docs: sync AGENTS.md with gitea/gitea (#1134)

Carries over the applicable rules from https://gitea.com/gitea/gitea `AGENTS.md`, including the Conventional Commits and `make lint-go-windows` requirements this repo already enforces but never documented for agents. Swaps `Co-Authored-By` for the `Assisted-by` trailer.

Reviewed-on: https://gitea.com/gitea/runner/pulls/1134
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

.gitea/workflows/pull-pr-title.yml

@@ -0,0 +1,27 @@
+name: pr-title
+
+on:
+  pull_request:
+    types:
+    - opened
+    - edited
+    - reopened
+    - synchronize
+    - ready_for_review
+
+permissions:
+  contents: read
+
+jobs:
+  lint-pr-title:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+    - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      with:
+        node-version: 24
+    - run: make lint-pr-title
+      env:
+        PR_TITLE: ${{ github.event.pull_request.title }}

.gitea/workflows/release-nightly.yml

@@ -17,14 +17,26 @@ jobs:
   goreleaser:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           fetch-depth: 0
-      - uses: actions/setup-go@v6
+      # Custom publishers (the R2 mirror below) run as the very last
+      # step of goreleaser's publish pipeline, after the Gitea release
+      # has already been created and every artifact already uploaded
+      # to S3. Fail here instead, before anything is built or
+      # published, if the R2 secrets are missing.
+      - name: check R2 configuration
+        run: sh scripts/upload-r2.sh --check-config
+        env:
+          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+          R2_BUCKET: ${{ secrets.R2_BUCKET }}
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7
         with:
           go-version-file: "go.mod"
       - name: goreleaser
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@f06c13b6b1a9625abc9e6e439d9c05a8f2190e94 # v7
         with:
           distribution: goreleaser-pro
           args: release --nightly
@@ -35,6 +47,10 @@ jobs:
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           S3_REGION: ${{ secrets.AWS_REGION }}
           S3_BUCKET: ${{ secrets.AWS_BUCKET }}
+          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+          R2_BUCKET: ${{ secrets.R2_BUCKET }}
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
           GORELEASER_FORCE_TOKEN: "gitea"
           GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -43,27 +59,33 @@ jobs:
     strategy:
       matrix:
         variant:
+          # The basic image is built from source and can target any arch the
+          # toolchain supports. The dind variants are limited to the arches the
+          # docker:dind base image publishes.
           - target: basic
             tag_suffix: ""
+            platforms: linux/amd64,linux/arm64,linux/riscv64,linux/s390x
           - target: dind
             tag_suffix: "-dind"
+            platforms: linux/amd64,linux/arm64
           - target: dind-rootless
             tag_suffix: "-dind-rootless"
+            platforms: linux/amd64,linux/arm64
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           fetch-depth: 0 # all history for all branches and tags
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@96fe6ef7f33517b61c61be40b68a1882f3264fb8 # v4
 
       - name: Set up Docker BuildX
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4
 
       - name: Login to DockerHub
-        uses: docker/login-action@v3
+        uses: docker/login-action@abd2ef45e78c5afb21d64d4ca52ee8550d9572c7 # v4
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
@@ -71,15 +93,20 @@ jobs:
       - name: Echo the tag
         run: echo "${{ env.DOCKER_ORG }}/runner:nightly${{ matrix.variant.tag_suffix }}"
 
+      - name: Get Meta
+        id: meta
+        run: |
+          echo REPO_VERSION=$(git describe --tags --always | sed 's/-/+/' | sed 's/^v//') >> $GITHUB_OUTPUT
+
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
         with:
           context: .
           file: ./Dockerfile
           target: ${{ matrix.variant.target }}
-          platforms: |
-            linux/amd64
-            linux/arm64
+          platforms: ${{ matrix.variant.platforms }}
           push: true
           tags: |
             ${{ env.DOCKER_ORG }}/runner:nightly${{ matrix.variant.tag_suffix }}
+          build-args: |
+            VERSION=${{ steps.meta.outputs.REPO_VERSION }}

.gitea/workflows/release-tag.yml

@@ -9,21 +9,33 @@ jobs:
   goreleaser:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           fetch-depth: 0 # all history for all branches and tags
-      - uses: actions/setup-go@v6
+      # Custom publishers (the R2 mirror below) run as the very last
+      # step of goreleaser's publish pipeline, after the Gitea release
+      # has already been created and every artifact already uploaded
+      # to S3. Fail here instead, before anything is built or
+      # published, if the R2 secrets are missing.
+      - name: check R2 configuration
+        run: sh scripts/upload-r2.sh --check-config
+        env:
+          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+          R2_BUCKET: ${{ secrets.R2_BUCKET }}
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7
         with:
           go-version-file: "go.mod"
       - name: Import GPG key
         id: import_gpg
-        uses: crazy-max/ghaction-import-gpg@v7
+        uses: crazy-max/ghaction-import-gpg@2dc316deee8e90f13e1a351ab510b4d5bc0c82cd # v7
         with:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.PASSPHRASE }}
           fingerprint: CC64B1DB67ABBEECAB24B6455FC346329753F4B0
       - name: goreleaser
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@f06c13b6b1a9625abc9e6e439d9c05a8f2190e94 # v7
         with:
           distribution: goreleaser-pro
           args: release
@@ -34,6 +46,10 @@ jobs:
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           S3_REGION: ${{ secrets.AWS_REGION }}
           S3_BUCKET: ${{ secrets.AWS_BUCKET }}
+          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+          R2_BUCKET: ${{ secrets.R2_BUCKET }}
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
           GORELEASER_FORCE_TOKEN: "gitea"
           GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
@@ -42,12 +58,18 @@ jobs:
     strategy:
       matrix:
         variant:
+          # The basic image is built from source and can target any arch the
+          # toolchain supports. The dind variants are limited to the arches the
+          # docker:dind base image publishes.
           - target: basic
             tag_suffix: ""
+            platforms: linux/amd64,linux/arm64,linux/riscv64,linux/s390x
           - target: dind
             tag_suffix: "-dind"
+            platforms: linux/amd64,linux/arm64
           - target: dind-rootless
             tag_suffix: "-dind-rootless"
+            platforms: linux/amd64,linux/arm64
     container:
       image: catthehacker/ubuntu:act-latest
     env:
@@ -55,25 +77,25 @@ jobs:
       DOCKER_LATEST: latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           fetch-depth: 0 # all history for all branches and tags
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@96fe6ef7f33517b61c61be40b68a1882f3264fb8 # v4
 
       - name: Set up Docker BuildX
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4
 
       - name: Login to DockerHub
-        uses: docker/login-action@v3
+        uses: docker/login-action@abd2ef45e78c5afb21d64d4ca52ee8550d9572c7 # v4
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
       - name: "Docker meta"
         id: docker_meta
-        uses: https://github.com/docker/metadata-action@v5
+        uses: docker/metadata-action@dc802804100637a589fabce1cb79ff13a1411302 # v6
         with:
           images: |
             ${{ env.DOCKER_ORG }}/runner
@@ -86,13 +108,13 @@ jobs:
             suffix=${{ matrix.variant.tag_suffix }},onlatest=true
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
         with:
           context: .
           file: ./Dockerfile
           target: ${{ matrix.variant.target }}
-          platforms: |
-            linux/amd64
-            linux/arm64
+          platforms: ${{ matrix.variant.platforms }}
           push: true
           tags: ${{ steps.docker_meta.outputs.tags }}
+          build-args: |
+            VERSION=${{ steps.docker_meta.outputs.version }}

.gitea/workflows/test.yml

@@ -9,14 +9,42 @@ jobs:
   lint:
     name: check and test
     runs-on: ubuntu-latest
+    env:
+      # The runner image ships a stale docker.io login; point docker at an empty config so
+      # image pulls go straight to anonymous instead of attempting (and failing) that auth
+      # first. The path must be a literal: the `runner` context is unavailable in job-level
+      # env, so `${{ runner.temp }}` would resolve to empty and config.Dir() would fall back
+      # to ~/.docker with the stale credentials.
+      DOCKER_CONFIG: /tmp/docker-noauth
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-go@v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7
         with:
           go-version-file: 'go.mod'
+      - name: prepare anonymous docker config
+        run: mkdir -p "$DOCKER_CONFIG" && echo '{}' > "$DOCKER_CONFIG/config.json"
+      # Pre-pull act/runner's two largest base images so a slow pull can't dominate `make test`;
+      # the rest (alpine/ubuntu) pull on demand, absorbed by the make-test -timeout. The host
+      # daemon retains them between runs, so this is usually a fast manifest re-check.
+      - name: pre-pull test images
+        run: |
+          for img in node:24-bookworm-slim nginx:alpine; do
+            for try in 1 2 3; do docker pull "$img" && break || sleep 5; done
+          done
       - name: lint
         run: make lint
+      - name: checks
+        run: make checks
       - name: build
         run: make build
       - name: test
-        run: make test
+        run: make test
+      # Build the dind image and run the daemon-facing tests against the docker version it
+      # ships, catching daemon-level regressions (e.g. gitea/runner#981) before release. Runs
+      # after `make test` so the images it needs are already present on the host daemon.
+      - name: test against dind image
+        run: make test-dind
+      - name: coverage report
+        run: |
+          make coverage-report
+          cat .tmp/coverage.md >> "$GITHUB_STEP_SUMMARY"

.gitignore

@@ -1,7 +1,10 @@
 /gitea-runner
 .env
+!/act/runner/testdata/secrets/.env
 .runner
+.runner.lock
 coverage.txt
+.tmp/
 /config.yaml
 
 # Jetbrains
@@ -10,4 +13,5 @@ coverage.txt
 .vscode
 __debug_bin
 # gorelease binary folder
-dist
+/dist
+.DS_Store

.golangci.yml

@@ -11,6 +11,7 @@ linters:
     - dupl
     - errcheck
     - forbidigo
+    - forcetypeassert
     - gocheckcompilerdirectives
     - gocritic
     - goheader
@@ -36,12 +37,8 @@ linters:
       rules:
         main:
           deny:
-            - pkg: io/ioutil
-              desc: use os or io instead
             - pkg: golang.org/x/exp
               desc: it's experimental and unreliable
-            - pkg: github.com/pkg/errors
-              desc: use builtin errors package instead
     nolintlint:
       allow-unused: false
       require-explanation: true
@@ -102,6 +99,9 @@ linters:
       - linters:
           - forbidigo
         path: cmd
+      - linters:
+          - forcetypeassert
+        path: _test\.go
 issues:
   max-issues-per-linter: 0
   max-same-issues: 0

.goreleaser.yaml

@@ -93,6 +93,37 @@ blobs:
       - glob: ./**.xz
       - glob: ./**.sha256
 
+# Mirrors the S3 `blobs:` upload above into Cloudflare R2 during the
+# parallel S3+R2 period (S3 will be removed once migration completes).
+# A second `blobs:` entry is impossible here since the blob pipe
+# authenticates from the global AWS_* env with no per-entry
+# credentials; `publishers:` supports per-entry `env:` instead, so
+# it's used to invoke scripts/upload-r2.sh once per artifact. Custom
+# publishers inherit almost nothing from the environment, hence the
+# explicit R2_* forwarding below.
+#
+# This publisher fires 109 times for 73 distinct keys because
+# goreleaser's release pipe already registers `release.extra_files`
+# as UploadableFile artifacts, and `internal/exec`'s filterArtifacts
+# appends this block's own extra_files with no de-duplication. It
+# can't be globbed away, since gobwas/glob (via goreleaser/fileglob)
+# has no substring-exclusion matcher. It's harmless: PUT is
+# idempotent, and the `./**.xz` glob below is kept deliberately so
+# this publisher declares its own complete file set rather than
+# implicitly depending on the `release:` block's globs.
+publishers:
+  - name: cloudflare-r2
+    checksum: true
+    extra_files:
+      - glob: ./**.xz
+      - glob: ./**.sha256
+    cmd: sh scripts/upload-r2.sh {{ abs .ArtifactPath }} gitea-runner/{{ .Version }}/{{ .ArtifactName }}
+    env:
+      - R2_ENDPOINT={{ index .Env "R2_ENDPOINT" }}
+      - R2_BUCKET={{ index .Env "R2_BUCKET" }}
+      - R2_ACCESS_KEY_ID={{ index .Env "R2_ACCESS_KEY_ID" }}
+      - R2_SECRET_ACCESS_KEY={{ index .Env "R2_SECRET_ACCESS_KEY" }}
+
 archives:
   - format: binary
     name_template: "{{ .Binary }}"

AGENTS.md

@@ -1,10 +1,18 @@
+- Never assume, verify before claiming
 - Use `make help` to find available development targets
-- Run `make fmt` to format `.go` files, and run `make lint-go` to lint them
-- Run `make tidy` after any `go.mod` changes
-- Run single go unit tests with `go test -run '^TestName$' ./modulepath/`
+- PR descriptions: minimal, only what and why, no task lists or file listings
+- Reference issues and PRs by full URL, not by number
+- Use Conventional Commits for commit messages and PR titles, plus the `enhance` type for user-facing enhancements
+- Add an `Assisted-by: AGENT_NAME:MODEL_VERSION` trailer to commit messages, never `Co-Authored-By` or `Signed-off-by`
+- Attribute agent authorship on one trailing line in issue and pull request comments, never as a PR description section
+- Never force-push, amend, or squash unless asked. Use new commits and normal push for pull request updates
+- Comments: write almost none, short and preferably same-line, explaining why for a future reader. Never narrate code, the change or the prompt. Preserve existing ones that still apply
 - Add the current year into the copyright header of new `.go` files
 - Ensure no trailing whitespace in edited files
-- Never force-push, amend, or squash unless asked. Use new commits and normal push for pull request updates
-- Preserve existing code comments, do not remove or rewrite comments that are still relevant
-- Include authorship attribution in issue and pull request comments
-- Add `Co-Authored-By` lines to all commits, indicating name and model used
+- Run `make fmt` after `.go` edits, `make tidy` after `go.mod` edits, and `make checks` for the non-lint source checks
+- Lint what changed with `make lint-go`, and `make lint-go-windows` for Windows and platform-split files
+- Fix the cause rather than disabling a linter or weakening a test. Where unavoidable, use the narrowest scope with a trailing comment giving the reason
+- Run single go tests with `go test -run '^TestName$' ./modulepath/`. `make test` self-skips the integration tests without docker or network, `make test-dind` runs the daemon-facing tests against the built dind image
+- Write the fewest, fastest tests covering the behavior, extending an existing one where possible. Prefer unit tests where logic is testable in isolation
+- Wait on a deterministic condition rather than `sleep`
+- Update the files under `docs/` when behavior documented there changes

Dockerfile

@@ -1,7 +1,7 @@
 ### BUILDER STAGE
 #
 #
-FROM golang:1.26-alpine AS builder
+FROM golang:1.26-alpine3.23 AS builder
 
 # Do not remove `git` here, it is required for getting runner version when executing `make build`
 RUN apk add --no-cache make git
@@ -17,9 +17,14 @@ RUN make clean && make build
 ### DIND VARIANT
 #
 #
-FROM docker:29-dind AS dind
+FROM docker:29.6.2-dind AS dind
 
-RUN apk add --no-cache s6 bash git tzdata
+ARG VERSION=dev
+
+LABEL org.opencontainers.image.source="https://gitea.com/gitea/runner"
+LABEL org.opencontainers.image.version="${VERSION}"
+
+RUN apk add --no-cache s6 bash git tzdata nftables
 
 COPY --from=builder /opt/src/runner/gitea-runner /usr/local/bin/gitea-runner
 COPY scripts/run.sh /usr/local/bin/run.sh
@@ -32,10 +37,15 @@ ENTRYPOINT ["s6-svscan","/etc/s6"]
 ### DIND-ROOTLESS VARIANT
 #
 #
-FROM docker:29-dind-rootless AS dind-rootless
+FROM docker:29.6.2-dind-rootless AS dind-rootless
+
+ARG VERSION=dev
+
+LABEL org.opencontainers.image.source="https://gitea.com/gitea/runner"
+LABEL org.opencontainers.image.version="${VERSION}"
 
 USER root
-RUN apk add --no-cache s6 bash git tzdata
+RUN apk add --no-cache s6 bash git tzdata nftables
 
 COPY --from=builder /opt/src/runner/gitea-runner /usr/local/bin/gitea-runner
 COPY scripts/run.sh /usr/local/bin/run.sh
@@ -53,7 +63,13 @@ ENTRYPOINT ["s6-svscan","/etc/s6"]
 ### BASIC VARIANT
 #
 #
-FROM alpine AS basic
+FROM alpine:3.24 AS basic
+
+ARG VERSION=dev
+
+LABEL org.opencontainers.image.source="https://gitea.com/gitea/runner"
+LABEL org.opencontainers.image.version="${VERSION}"
+
 RUN apk add --no-cache tini bash git tzdata
 
 COPY --from=builder /opt/src/runner/gitea-runner /usr/local/bin/gitea-runner

Makefile

@@ -4,9 +4,9 @@ DIST_DIRS := $(DIST)/binaries $(DIST)/release
 GO ?= go
 SHASUM ?= shasum -a 256
 HAS_GO = $(shell hash $(GO) > /dev/null 2>&1 && echo "GO" || echo "NOGO" )
-XGO_PACKAGE ?= src.techknowlogick.com/xgo@latest
+XGO_PACKAGE ?= src.techknowlogick.com/xgo@v1.9.0 # renovate: datasource=go
 XGO_VERSION := go-1.26.x
-GXZ_PACKAGE ?= github.com/ulikunitz/xz/cmd/gxz@v0.5.10
+GXZ_PACKAGE ?= github.com/ulikunitz/xz/cmd/gxz@v0.5.15 # renovate: datasource=go
 
 LINUX_ARCHS ?= linux/amd64,linux/arm64
 DARWIN_ARCHS ?= darwin-12/amd64,darwin-12/arm64
@@ -18,8 +18,10 @@ DOCKER_TAG ?= nightly
 DOCKER_REF := $(DOCKER_IMAGE):$(DOCKER_TAG)
 DOCKER_ROOTLESS_REF := $(DOCKER_IMAGE):$(DOCKER_TAG)-dind-rootless
 
-GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.11.4
-GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1
+GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.12.2 # renovate: datasource=go
+GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1.3.0 # renovate: datasource=go
+
+GOTEST_FLAGS ?= -race -timeout 20m -parallel 8
 
 STATIC ?=
 EXTLDFLAGS ?=
@@ -38,12 +40,15 @@ endif
 ifeq ($(OS), Windows_NT)
 	GOFLAGS := -v -buildmode=exe
 	EXECUTABLE ?= $(EXECUTABLE).exe
+	GO_ENV_WINDOWS := set GOOS=windows&&
 else ifeq ($(OS), Windows)
 	GOFLAGS := -v -buildmode=exe
 	EXECUTABLE ?= $(EXECUTABLE).exe
+	GO_ENV_WINDOWS := set GOOS=windows&&
 else
 	GOFLAGS := -v
 	EXECUTABLE ?= $(EXECUTABLE)
+	GO_ENV_WINDOWS := GOOS=windows
 endif
 
 STORED_VERSION_FILE := VERSION
@@ -92,7 +97,7 @@ go-check:
 
 .PHONY: fmt-check
 fmt-check: fmt
-	@diff=$$(git diff --color=always); \
+	@diff=$$(git diff --color=always -- '*.go'); \
 	if [ -n "$$diff" ]; then \
 		echo "Please run 'make fmt' and commit the result:"; \
 		printf "%s" "$${diff}"; \
@@ -107,19 +112,31 @@ deps-tools: ## install tool dependencies
 	$(GO) install $(GOVULNCHECK_PACKAGE) & \
 	wait
 
+.PHONY: checks
+checks: tidy-check fmt-check security-check ## run the non-lint source checks
+
 .PHONY: lint
-lint: lint-go ## lint everything
+lint: lint-go lint-go-windows ## lint everything
 
 .PHONY: lint-go
 lint-go: ## lint go files
 	$(GO) run $(GOLANGCI_LINT_PACKAGE) run
 
+.PHONY: lint-go-windows
+lint-go-windows: ## lint Windows go files
+	$(GO) install $(GOLANGCI_LINT_PACKAGE)
+	$(GO_ENV_WINDOWS) golangci-lint run
+
 .PHONY: lint-go-fix
 lint-go-fix: ## lint go files and fix issues
 	$(GO) run $(GOLANGCI_LINT_PACKAGE) run --fix
 
+.PHONY: lint-pr-title
+lint-pr-title: ## lint PR title against Conventional Commits (set PR_TITLE=...)
+	@node ./tools/lint-pr-title.ts
+
 .PHONY: security-check
-security-check: deps-tools
+security-check:
 	GOEXPERIMENT= $(GO) run $(GOVULNCHECK_PACKAGE) -show color ./... || true
 
 .PHONY: tidy
@@ -136,8 +153,18 @@ tidy-check: tidy
 	fi
 
 .PHONY: test
-test: fmt-check security-check ## test everything
-	@$(GO) test -race -short -v -cover -coverprofile coverage.txt ./... && echo "\n==>\033[32m Ok\033[m\n" || exit 1
+test: ## test everything (integration tests self-skip without docker/network)
+	@$(GO) test $(GOTEST_FLAGS) -cover -coverprofile coverage.txt ./... && echo "\n==>\033[32m Ok\033[m\n" || exit 1
+
+.PHONY: coverage-report
+coverage-report: ## turn coverage.txt from `make test` into .tmp/coverage.md
+	@mkdir -p .tmp
+	@node ./tools/coverage-report.ts -i coverage.txt -o .tmp/coverage.md
+	@echo "Wrote .tmp/coverage.md"
+
+.PHONY: test-dind
+test-dind: ## run the daemon-facing tests against the built dind image (TARGET=dind|dind-rootless)
+	@./scripts/test-dind.sh $(TARGET)
 
 .PHONY: install
 install: $(GOFILES) ## install the runner binary via `go install`
@@ -202,7 +229,7 @@ docker: ## build the docker image
 .PHONY: clean
 clean: ## delete binary and coverage files
 	$(GO) clean -x -i ./...
-	rm -rf coverage.txt $(EXECUTABLE) $(DIST)
+	rm -rf coverage.txt .tmp $(EXECUTABLE) $(DIST)
 
 .PHONY: version
 version: ## print the version

README.md

@@ -85,6 +85,48 @@ docker run -e GITEA_INSTANCE_URL=https://your_gitea.com -e GITEA_RUNNER_REGISTRA
 
 Mount a volume on `/data` if you want the registration file and optional config to survive container recreation (see [scripts/run.sh](scripts/run.sh)).
 
+> **`/data` does not hold the image cache.** It is the runner's working directory and contains only the `.runner` registration file and, optionally, your config file. Images pulled for jobs live in the *Docker daemon's* data root, which for the `dind` flavours is inside the container (`/var/lib/docker`, or `/home/rootless/.local/share/docker` for `dind-rootless`). To keep the image cache across restarts, give that path its own volume as well — otherwise every new container re-pulls the job images. With the `basic` flavour the images live on whichever daemon you point the runner at, so there is nothing extra to persist.
+
+### Image flavours
+
+The image is published in three flavours, all built from the single multi-stage [Dockerfile](Dockerfile) in this repository. They differ only in how a Docker daemon is made available to the jobs the runner executes; the `gitea-runner` binary inside them is identical.
+
+| Tag | Build target | Base image | Docker daemon | Process supervisor | Runs as |
+| --- | --- | --- | --- | --- | --- |
+| `latest` (and `<version>`) | `basic` | `alpine` | none — uses an external daemon you provide | [`tini`](https://github.com/krallin/tini) | `root` |
+| `latest-dind` | `dind` | `docker:dind` | bundled, started inside the container | [`s6`](https://skarnet.org/software/s6/) | `root` (privileged) |
+| `latest-dind-rootless` | `dind-rootless` | `docker:dind-rootless` | bundled, started rootless inside the container | [`s6`](https://skarnet.org/software/s6/) | `rootless` (UID 1000) |
+
+#### `latest` — basic
+
+The default flavour ships only the runner on a minimal Alpine base. It contains **no Docker daemon of its own**: jobs that use `docker://` images need a daemon supplied from outside the container, typically by bind-mounting the host's socket:
+
+```bash
+docker run -e GITEA_INSTANCE_URL=https://your_gitea.com -e GITEA_RUNNER_REGISTRATION_TOKEN=<your_token> \
+  -v /var/run/docker.sock:/var/run/docker.sock --name my_runner gitea/runner:latest
+```
+
+`tini` is the entrypoint (it reaps zombie processes), and it just runs [`scripts/run.sh`](scripts/run.sh), which registers the runner on first start and then execs `gitea-runner daemon`. This flavour does not need `--privileged`. The trade-off is that jobs share the host's daemon, so they can see other containers and images on that daemon.
+
+#### `latest-dind` — Docker-in-Docker
+
+This flavour is based on the official `docker:dind` image and bundles its own Docker daemon, so it needs no external socket — only the `--privileged` flag that Docker-in-Docker requires:
+
+```bash
+docker run --privileged -e GITEA_INSTANCE_URL=https://your_gitea.com -e GITEA_RUNNER_REGISTRATION_TOKEN=<your_token> \
+  --name my_runner gitea/runner:latest-dind
+```
+
+Two processes have to run side by side here (the Docker daemon and the runner), so the entrypoint is the [`s6`](https://skarnet.org/software/s6/) supervision tree under [`scripts/s6`](scripts/s6) instead of `tini`. `s6` starts `dockerd`, and the runner service waits for the daemon to come up (`s6-svwait`) before launching [`run.sh`](scripts/run.sh). Each container has a private daemon isolated from the host's, at the cost of running privileged.
+
+#### `latest-dind-rootless` — rootless Docker-in-Docker
+
+Same idea as `dind`, but built on `docker:dind-rootless` so the bundled daemon and the runner run as an unprivileged user (`rootless`, UID 1000) rather than `root`. `DOCKER_HOST` is preset to `unix:///run/user/1000/docker.sock` so the runner talks to the rootless daemon. This reduces the blast radius compared to the privileged `dind` flavour, but rootless Docker carries the usual rootless limitations (networking, cgroups, storage drivers, and some operations that need additional host configuration such as `/etc/subuid` / `/etc/subgid` mappings and unprivileged user-namespace support).
+
+> **The UID is fixed at 1000.** It comes from the `rootless` user baked into the upstream `docker:dind-rootless` base image, and the bundled daemon always listens on `/run/user/1000/docker.sock` inside the container, so running this flavour as a different user (`--user 1001`) does not work. If you need the runner to talk to a *host* rootless daemon that runs under some other UID, use the `basic` flavour instead and bind-mount that daemon's socket (see [examples/vm/rootless-docker.md](examples/vm/rootless-docker.md)); pointing `DOCKER_HOST` at a host socket from inside `dind-rootless` will not work. Changing the UID otherwise means rebuilding the image from a base with a different `rootless` user.
+
+> **Note on Podman:** these images target the Docker daemon. The bundled `dind`/`dind-rootless` daemons are `dockerd`, not Podman, and the `basic` flavour expects a Docker-compatible socket. Running them under rootless Podman is not a supported configuration, though pointing the `basic` flavour at a Podman socket that emulates the Docker API may work for some workloads.
+
 ### Configuration
 
 The runner is configured with a YAML file. Generate a starting point (this matches what ships in the tree):
@@ -105,26 +147,146 @@ Every option is described in [config.example.yaml](internal/pkg/config/config.ex
 
 #### Without a config file
 
-If you omit `-c`, built-in defaults apply (same as an empty YAML document). A small set of **deprecated** environment variables can still override parts of that default config, but **only when no `-c` path was given**; they are ignored if you use a config file:
+If you omit `-c`, built-in defaults apply (same as an empty YAML document).
 
-| Variable | Effect |
+Earlier releases let a small set of environment variables (`GITEA_DEBUG`, `GITEA_TRACE`, `GITEA_RUNNER_CAPACITY`, `GITEA_RUNNER_FILE`, `GITEA_RUNNER_ENVIRON`, `GITEA_RUNNER_ENV_FILE`) override parts of the default config. Those overrides have been removed — use a YAML config file for all settings instead. For the Docker images, the entrypoint still understands a separate set of variables (such as `RUNNER_STATE_FILE`); see [scripts/run.sh](scripts/run.sh) and the container documentation below.
+
+### Labels
+
+Labels decide **which jobs a runner accepts** and **how it runs them**. A job's `runs-on` is matched against the runner's label names; the first match wins and selects the execution environment for that job.
+
+A label is written as:
+
+```text
+<name>[:<schema>[:<args>]]
+```
+
+| Part | Meaning |
 | --- | --- |
-| `GITEA_DEBUG` | If true, sets log level to `debug` |
-| `GITEA_TRACE` | If true, sets log level to `trace` |
-| `GITEA_RUNNER_CAPACITY` | Concurrent jobs (integer) |
-| `GITEA_RUNNER_FILE` | Registration state file path (default `.runner`) |
-| `GITEA_RUNNER_ENVIRON` | Extra job env vars as comma-separated `KEY:VALUE` pairs |
-| `GITEA_RUNNER_ENV_FILE` | Path to an env file merged into job env (same idea as `runner.env_file` in YAML) |
+| `name` | The name a workflow refers to in `runs-on`, e.g. `ubuntu-latest`. |
+| `schema` | Either `docker` or `host`. Defaults to `host` when omitted. |
+| `args` | Only used by the `docker` schema: the image to run the job in. |
 
-Prefer a YAML file for all settings.
+Two schemas are supported:
+
+- **`docker://<image>`** — the job runs inside a container created from `<image>`:
+
+  ```text
+  ubuntu-latest:docker://docker.gitea.com/runner-images:ubuntu-latest
+  ```
+
+- **`host`** — the job's steps run directly on the machine the runner is on, using the tools installed there:
+
+  ```text
+  macos:host
+  ```
+
+So with the labels
+
+```text
+ubuntu-latest:docker://docker.gitea.com/runner-images:ubuntu-latest,macos:host
+```
+
+a workflow with `runs-on: ubuntu-latest` is executed in the `runner-images:ubuntu-latest` container, and one with `runs-on: macos` is executed directly on the host.
+
+Names may themselves contain a colon (for example `pool:e57e18d4-10d4-406f-93bf-60f127221bdd`); only `host` and `docker` are treated as schemas.
+
+If a job's `runs-on` matches none of the runner's labels, the job still runs, in the default `docker.gitea.com/runner-images:ubuntu-latest` image. Images maintained for this purpose are listed at [gitea/runner-images](https://gitea.com/gitea/runner-images).
+
+Labels are chosen at registration time (`--labels`, or the interactive prompt) and can be changed afterwards by editing `runner.labels` in the config file, or in the Gitea UI under the runner's settings.
 
 #### Registration vs config labels
 
 If `runner.labels` is set in the YAML file, those labels are used during `register` and the `--labels` CLI flag is ignored.
 
-#### External cache (`actions/cache`)
+The `daemon` command also accepts `--labels` (which defaults to the `GITEA_RUNNER_LABELS` environment variable), so the labels of an already registered runner can be changed without deleting its registration file. The most explicit source wins:
 
-If `cache.external_server` is set, you must set `cache.external_secret` to the same value on this runner and on the standalone cache server. Run the server with `gitea-runner cache-server` using a config that defines `cache.external_secret` (and matching `cache.dir` / host / port as needed). Flags `--dir`, `--host`, and `--port` on `cache-server` override the file.
+```
+--labels / GITEA_RUNNER_LABELS   >   runner.labels in the config file   >   labels in the .runner file
+```
+
+Whenever the resulting labels differ from the ones in the registration file, they are written back to it and re-declared to the Gitea instance on startup.
+
+> **Note:** A runner that only exposes `host` labels still needs access to a Docker daemon (e.g. a mounted `/var/run/docker.sock`) whenever a job uses a `docker://` action or a service container. `host` labels only change where the job's own steps run; container-based steps and actions are still executed with Docker.
+
+#### Proxy
+
+Set these variables in the runner's environment, with systemd `Environment=`, `docker run -e`, or Kubernetes `env:`:
+
+```sh
+http_proxy=http://proxy.example:3128
+https_proxy=http://proxy.example:3128
+no_proxy=gitea.internal,.example.local
+```
+
+The runner uses them for its own requests and gives them to every job, in lower and upper case.
+
+These hosts are added to `no_proxy` for jobs, so they are always reached directly:
+
+- the cache server
+- `localhost`, `127.0.0.1` and `::1`
+- the job's service containers
+- the Docker daemon, when it is reached over `tcp://`
+
+Gitea is not added. Add it to `no_proxy` yourself if it should be reached directly.
+
+To change a value for one job, set it in a step's `env:` or in the job's `container.env`. Setting it at workflow or job level has no effect. To change it for the whole runner, set it in `runner.envs`. A `no_proxy` set there is added to the list above instead of replacing it.
+
+Images are pulled by the Docker daemon, which needs its own proxy setting. In the `dind` images the daemon runs in the same container and reads the variables above. For any other daemon, see [the Docker documentation](https://docs.docker.com/engine/daemon/proxy/). The runner logs a warning at startup if it has a proxy and the daemon does not.
+
+Dockerfile actions are built with these variables as build arguments, so their `RUN` steps can reach the network.
+
+A password in a proxy URL is hidden in job logs. Any step can still read it, because the step is given the proxy URL in its environment.
+
+#### Caching (`actions/cache`)
+
+Each runner starts its own cache server automatically. Cache entries are local to that runner — runners do not share a cache by default.
+
+**Cache service v2**
+
+`actions/cache@v4.2` and later can use the *cache service v2* API. The runner serves it from the same store as v1, on by default, and it works with `external_server`. Turn it off with:
+
+```yaml
+cache:
+  v2: false
+```
+
+Those actions refuse any host they do not take for GitHub. Rather than misreport the server URL, the runner edits that check out of the action's own bundle and keeps the untouched copy beside it; a bundle it does not recognise is left alone and keeps to v1. The same edit lets the stock `actions/upload-artifact` and `actions/download-artifact` work from `v4.4.0` on, without the `gitea-upload-artifact` fork.
+
+**Shared cache across multiple runners**
+
+Run one dedicated `gitea-runner cache-server` that all runners point at.
+
+1. Create a config file for the cache server host:
+
+   ```yaml
+   cache:
+     dir: /data/actcache
+     port: 8088
+     external_secret: "replace-with-a-strong-random-secret"
+     # external_secret_file: /path/to/secret # secret can also be passed via a file
+   ```
+
+2. Start the server:
+
+   ```bash
+   gitea-runner -c cache-server-config.yaml cache-server
+   ```
+
+3. On every runner:
+
+   ```yaml
+   cache:
+     external_server: "http://<cache-server-host>:8088/"
+     external_secret: "replace-with-a-strong-random-secret"  # must match the server
+     # external_secret_file: /path/to/secret # secret can also be passed via a file
+   ```
+
+Alternatively, mount the same NFS/CIFS share on every runner and point `cache.dir` at it — simpler, but with weaker isolation between repositories.
+
+**S3 / MinIO** — mount object storage as a FUSE filesystem (e.g. [s3fs](https://github.com/s3fs-fuse/s3fs-fuse) or [goofys](https://github.com/kahing/goofys)) and set `cache.dir` to the mount point.
+
+Flags `--dir`, `--host`, and `--port` on `cache-server` override the corresponding `cache.*` YAML keys; all other settings, including `external_secret`, require the config file.
 
 #### Official Docker image
 
@@ -132,11 +294,32 @@ Besides `GITEA_INSTANCE_URL` and `GITEA_RUNNER_REGISTRATION_TOKEN`, the image en
 
 For a fuller container-oriented walkthrough, see [examples/docker](examples/docker/README.md).
 
-When `container.bind_workdir` is enabled, stale task workspace directories can be cleaned while the runner is idle:
-- directories older than `runner.workdir_cleanup_age` are removed (default: `24h`; set `0` to disable)
-- cleanup runs every `runner.idle_cleanup_interval` (default: `10m`; set `0` to disable)
+While the runner is idle it cleans up after earlier jobs:
+- when `container.bind_workdir` is enabled, stale task workspace directories older than `runner.workdir_cleanup_age` are removed (default: `24h`; set `0` to disable)
 - only purely numeric subdirectories under `container.workdir_parent` are treated as task workspaces and may be removed
 - cleanup assumes `container.workdir_parent` is not shared across multiple runners
+- on runners that use docker, per-job networks left behind by jobs the runner did not live to tear down are removed, identified by the `com.gitea.runner.uuid` label carrying this runner's uuid
+- cleanup runs every `runner.idle_cleanup_interval` (default: `10m`; set `0` to disable), and setting either knob to `0` disables all of the above
+
+#### Post-task script (`runner.post_task_script`)
+
+Optional host script that runs **after** each task's built-in cleanup (post-steps, container teardown, bind-workdir removal). Use it for extra machine housekeeping — Docker pruning, disk cleanup, and similar.
+
+**While the script runs, the runner stops task heartbeats and stays offline from Gitea's perspective until the script exits (or hits `runner.post_task_script_timeout`, default `5m`).** A script that blocks without exiting keeps the runner from taking new work for up to that timeout. Script output goes to the runner log, not the job log; a non-zero exit is warned but does not change the job result.
+
+On Windows, use `.exe`, `.bat`, or `.cmd` paths; **PowerShell (`.ps1`) is not supported yet** as the configured path — wrap commands in a `.cmd` file instead.
+
+See **[docs/post-task-script.md](docs/post-task-script.md)** for lifecycle details, environment variables, timeout interaction, and platform notes.
+
+#### Job hooks (`runner.hooks.job_started`, `runner.hooks.job_completed`)
+
+Optional scripts that run **inside the job environment** (the job container, or the host in host mode), before the job's first step and after its last one. They are the equivalent of GitHub's `ACTIONS_RUNNER_HOOK_JOB_STARTED` / `ACTIONS_RUNNER_HOOK_JOB_COMPLETED`, which are read when the settings are unset.
+
+Because they run where the steps run and see the job's environment, they are the place for per-job setup no workflow should have to carry: registry logins, mirror configuration, or masking runner-wide secrets with `::add-mask::`. Their output is part of the job log and is scanned for workflow commands, and they can export to the job through `$GITHUB_ENV` and `$GITHUB_PATH`.
+
+Both hooks are synchronous and block the job while they run. Either one exiting non-zero fails the job, and there is no per-hook timeout.
+
+See **[docs/job-hooks.md](docs/job-hooks.md)** for the execution order, environment, and platform notes.
 
 ### Example Deployments
 

act/artifactcache/handler.go

@@ -70,6 +70,7 @@ type Handler struct {
 	storage  *Storage
 	router   *httprouter.Router
 	listener net.Listener
+	port     int
 	server   *http.Server
 	logger   logrus.FieldLogger
 
@@ -157,12 +158,13 @@ func StartHandler(dir, outboundIP string, port uint16, internalSecret string, lo
 	router.POST(apiPath+"/clean", h.bearerAuth(h.clean))
 	// Artifact GET is signed via query-string HMAC because @actions/cache
 	// does not attach Authorization when downloading archiveLocation.
-	router.GET(apiPath+"/artifacts/:id", h.signedURLAuth(h.get))
+	router.GET(apiPath+"/artifacts/:id", h.signedAuth("", h.get))
 	// Control-plane: a remote runner registers/revokes per-job tokens so the
 	// cache API can authenticate them. Always wired so the routes exist; the
 	// handlers themselves 401 when internalSecret is unset.
 	router.POST(internalPath+"/register", h.internalAuth(h.internalRegister))
 	router.POST(internalPath+"/revoke", h.internalAuth(h.internalRevoke))
+	h.registerV2Routes(router)
 
 	h.router = router
 
@@ -177,6 +179,12 @@ func StartHandler(dir, outboundIP string, port uint16, internalSecret string, lo
 	if err != nil {
 		return nil, err
 	}
+	addr, ok := listener.Addr().(*net.TCPAddr)
+	if !ok {
+		listener.Close()
+		return nil, fmt.Errorf("cache server listens on %T, want a TCP address", listener.Addr())
+	}
+	h.port = addr.Port
 	server := &http.Server{
 		ReadHeaderTimeout: 2 * time.Second,
 		Handler:           router,
@@ -194,9 +202,7 @@ func StartHandler(dir, outboundIP string, port uint16, internalSecret string, lo
 
 func (h *Handler) ExternalURL() string {
 	// TODO: make the external url configurable if necessary
-	return fmt.Sprintf("http://%s:%d",
-		h.outboundIP,
-		h.listener.Addr().(*net.TCPAddr).Port)
+	return fmt.Sprintf("http://%s:%d", h.outboundIP, h.port)
 }
 
 // RegisterJob makes token a valid bearer credential for cache requests from
@@ -334,7 +340,7 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request, _ httprouter.Para
 	}
 	defer db.Close()
 
-	cache, err := findCache(db, cred.Repo, keys, version)
+	cache, err := h.lookupCache(db, cred.Repo, keys, version)
 	if err != nil {
 		h.responseJSON(w, r, 500, err)
 		return
@@ -343,15 +349,6 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request, _ httprouter.Para
 		h.responseJSON(w, r, 204)
 		return
 	}
-
-	if ok, err := h.storage.Exist(cache.ID); err != nil {
-		h.responseJSON(w, r, 500, err)
-		return
-	} else if !ok {
-		_ = db.Delete(cache.ID, cache)
-		h.responseJSON(w, r, 204)
-		return
-	}
 	h.responseJSON(w, r, 200, map[string]any{
 		"result":          "hit",
 		"archiveLocation": h.signedArtifactURL(cache.ID, time.Now().Add(artifactURLTTL)),
@@ -359,6 +356,25 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request, _ httprouter.Para
 	})
 }
 
+// lookupCache returns the entry to restore for these keys, or (nil, nil) when there is none:
+// either nothing matched, or the match had lost its blob to a prune, in which case the dangling
+// entry is dropped on the way out.
+func (h *Handler) lookupCache(db *bolthold.Store, repo string, keys []string, version string) (*Cache, error) {
+	cache, err := findCache(db, repo, keys, version)
+	if err != nil || cache == nil {
+		return nil, err
+	}
+	ok, err := h.storage.Exist(cache.ID)
+	if err != nil {
+		return nil, err
+	}
+	if !ok {
+		_ = db.Delete(cache.ID, cache)
+		return nil, nil //nolint:nilnil // absence is not an error here
+	}
+	return cache, nil
+}
+
 // POST /_apis/artifactcache/caches
 func (h *Handler) reserve(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
 	cred := credFromContext(r.Context())
@@ -431,8 +447,9 @@ func (h *Handler) upload(w http.ResponseWriter, r *http.Request, params httprout
 	}
 	if err := h.storage.Write(cache.ID, start, r.Body); err != nil {
 		h.responseJSON(w, r, 500, err)
+		return
 	}
-	h.useCache(id)
+	_ = h.touchCache(uint64(id), false)
 	h.responseJSON(w, r, 200)
 }
 
@@ -473,23 +490,7 @@ func (h *Handler) commit(w http.ResponseWriter, r *http.Request, params httprout
 
 	db.Close()
 
-	size, err := h.storage.Commit(cache.ID, cache.Size)
-	if err != nil {
-		h.responseJSON(w, r, 500, err)
-		return
-	}
-	// write real size back to cache, it may be different from the current value when the request doesn't specify it.
-	cache.Size = size
-
-	db, err = h.openDB()
-	if err != nil {
-		h.responseJSON(w, r, 500, err)
-		return
-	}
-	defer db.Close()
-
-	cache.Complete = true
-	if err := db.Update(cache.ID, cache); err != nil {
+	if err := h.commitCache(cache); err != nil {
 		h.responseJSON(w, r, 500, err)
 		return
 	}
@@ -497,8 +498,28 @@ func (h *Handler) commit(w http.ResponseWriter, r *http.Request, params httprout
 	h.responseJSON(w, r, 200)
 }
 
+// commitCache assembles the uploaded parts and marks the entry complete. The caller must
+// have closed its store first: Commit concatenates the whole archive and would otherwise
+// hold bolt's exclusive file lock for the duration.
+func (h *Handler) commitCache(cache *Cache) error {
+	written, err := h.storage.Commit(cache.ID, cache.Size)
+	if err != nil {
+		return err
+	}
+	// write real size back to cache, it may be different from the current value when the request doesn't specify it.
+	cache.Size = written
+	cache.Complete = true
+
+	db, err := h.openDB()
+	if err != nil {
+		return err
+	}
+	defer db.Close()
+	return db.Update(cache.ID, cache)
+}
+
 // GET /_apis/artifactcache/artifacts/:id
-// Authenticated via signed URL (see signedURLAuth), not bearer, because the
+// Authenticated via signed URL (see signedAuth), not bearer, because the
 // @actions/cache toolkit downloads archiveLocation without Authorization.
 // Repository scoping is already enforced at find() time; the signature binds
 // the URL to the specific cache ID and an expiry.
@@ -508,7 +529,7 @@ func (h *Handler) get(w http.ResponseWriter, r *http.Request, params httprouter.
 		h.responseJSON(w, r, 400, err)
 		return
 	}
-	h.useCache(id)
+	_ = h.touchCache(uint64(id), false)
 	h.storage.Serve(w, r, uint64(id))
 }
 
@@ -542,7 +563,9 @@ func (h *Handler) bearerAuth(handler httprouter.Handle) httprouter.Handle {
 	}
 }
 
-func (h *Handler) signedURLAuth(handler httprouter.Handle) httprouter.Handle {
+// signedAuth authenticates a signed URL. purpose separates the flavours of URL the
+// handler hands out, so one cannot be replayed as another; see computeSignature.
+func (h *Handler) signedAuth(purpose string, handler httprouter.Handle) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
 		h.logger.Debugf("%s %s", r.Method, r.URL.Path)
 		id, err := strconv.ParseInt(params.ByName("id"), 10, 64)
@@ -565,7 +588,7 @@ func (h *Handler) signedURLAuth(handler httprouter.Handle) httprouter.Handle {
 			h.responseJSON(w, r, http.StatusUnauthorized, errors.New("signature expired"))
 			return
 		}
-		expected := h.computeSignature(id, exp)
+		expected := h.computeSignature(purpose, id, exp)
 		if !hmac.Equal([]byte(sig), []byte(expected)) {
 			h.responseJSON(w, r, http.StatusUnauthorized, errors.New("bad signature"))
 			return
@@ -649,19 +672,26 @@ func credFromContext(ctx context.Context) JobCredential {
 	return JobCredential{}
 }
 
-func (h *Handler) computeSignature(cacheID, exp int64) string {
+// computeSignature signs a URL for one cache entry and expiry. purpose is mixed into the
+// message so a URL handed out for writing an entry cannot be replayed to read one, and the
+// other way round. Downloads use the empty purpose, the message v1 has always signed.
+func (h *Handler) computeSignature(purpose string, cacheID, exp int64) string {
 	mac := hmac.New(sha256.New, h.secret)
-	fmt.Fprintf(mac, "%d:%d", cacheID, exp)
+	fmt.Fprintf(mac, "%s%d:%d", purpose, cacheID, exp)
 	return hex.EncodeToString(mac.Sum(nil))
 }
 
-func (h *Handler) signedArtifactURL(cacheID uint64, exp time.Time) string {
+// signedURL builds a URL under path that signedAuth accepts for the same purpose.
+func (h *Handler) signedURL(path, purpose string, cacheID uint64, exp time.Time) string {
 	expUnix := exp.Unix()
-	sig := h.computeSignature(int64(cacheID), expUnix)
 	q := url.Values{}
 	q.Set("exp", strconv.FormatInt(expUnix, 10))
-	q.Set("sig", sig)
-	return fmt.Sprintf("%s%s/artifacts/%d?%s", h.ExternalURL(), apiPath, cacheID, q.Encode())
+	q.Set("sig", h.computeSignature(purpose, int64(cacheID), expUnix))
+	return fmt.Sprintf("%s%s/%d?%s", h.ExternalURL(), path, cacheID, q.Encode())
+}
+
+func (h *Handler) signedArtifactURL(cacheID uint64, exp time.Time) string {
+	return h.signedURL(apiPath+"/artifacts", "", cacheID, exp)
 }
 
 // if not found, return (nil, nil) instead of an error.
@@ -669,16 +699,12 @@ func findCache(db *bolthold.Store, repo string, keys []string, version string) (
 	cache := &Cache{}
 	for _, prefix := range keys {
 		// if a key in the list matches exactly, don't return partial matches
-		if err := db.FindOne(cache,
-			bolthold.Where("Repo").Eq(repo).
-				And("Key").Eq(prefix).
-				And("Version").Eq(version).
-				And("Complete").Eq(true).
-				SortBy("CreatedAt").Reverse()); err == nil || !errors.Is(err, bolthold.ErrNotFound) {
-			if err != nil {
-				return nil, fmt.Errorf("find cache: %w", err)
-			}
-			return cache, nil
+		exact, err := findExactCache(db, repo, prefix, version, true)
+		if err != nil {
+			return nil, err
+		}
+		if exact != nil {
+			return exact, nil
 		}
 		prefixPattern := "^" + regexp.QuoteMeta(prefix)
 		re, err := regexp.Compile(prefixPattern)
@@ -701,6 +727,34 @@ func findCache(db *bolthold.Store, repo string, keys []string, version string) (
 	return nil, nil //nolint:nilnil // pre-existing issue from nektos/act
 }
 
+// findExactCache returns the entry for exactly this key and version, or (nil, nil) if there is
+// none. Unlike findCache it never falls back to a prefix (restore-key) match, which is what both
+// its callers need: a new key that is only a prefix of an existing key is not the same entry.
+//
+// A completed entry is the one to restore, sorted by when it was written. An incomplete one is a
+// reservation being uploaded to, sorted by when it was last written to, because the upload route
+// touches UsedAt on every part.
+func findExactCache(db *bolthold.Store, repo, key, version string, complete bool) (*Cache, error) {
+	sortBy := "UsedAt"
+	if complete {
+		sortBy = "CreatedAt"
+	}
+	cache := &Cache{}
+	err := db.FindOne(cache,
+		bolthold.Where("Repo").Eq(repo).
+			And("Key").Eq(key).
+			And("Version").Eq(version).
+			And("Complete").Eq(complete).
+			SortBy(sortBy).Reverse())
+	if errors.Is(err, bolthold.ErrNotFound) {
+		return nil, nil //nolint:nilnil // absence is not an error here
+	}
+	if err != nil {
+		return nil, fmt.Errorf("find cache: %w", err)
+	}
+	return cache, nil
+}
+
 func insertCache(db *bolthold.Store, cache *Cache) error {
 	if err := db.Insert(bolthold.NextSequence(), cache); err != nil {
 		return fmt.Errorf("insert cache: %w", err)
@@ -712,18 +766,30 @@ func insertCache(db *bolthold.Store, cache *Cache) error {
 	return nil
 }
 
-func (h *Handler) useCache(id int64) {
+// touchCache stamps UsedAt so gcCache does not reap an entry mid-upload. With requireIncomplete
+// it also refuses an entry that is already complete, which is what the v2 blob route needs: its
+// upload URL outlives the finalize call, and overwriting a finished entry would leave the blob
+// other jobs restore no longer matching its recorded size. An entry missing from the store is
+// accepted, since the signature proves the id was handed out.
+func (h *Handler) touchCache(id uint64, requireIncomplete bool) error {
 	db, err := h.openDB()
 	if err != nil {
-		return
+		return err
 	}
 	defer db.Close()
+
 	cache := &Cache{}
 	if err := db.Get(id, cache); err != nil {
-		return
+		if errors.Is(err, bolthold.ErrNotFound) {
+			return nil
+		}
+		return err
+	}
+	if requireIncomplete && cache.Complete {
+		return fmt.Errorf("cache %d: already complete", id)
 	}
 	cache.UsedAt = time.Now().Unix()
-	_ = db.Update(cache.ID, cache)
+	return db.Update(cache.ID, cache)
 }
 
 const (

act/artifactcache/handler_test.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -338,6 +339,54 @@ func TestHandler(t *testing.T) {
 		}
 	})
 
+	t.Run("upload write failure returns only error", func(t *testing.T) {
+		key := strings.ToLower(t.Name())
+		version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
+		var id uint64
+		{
+			body, err := json.Marshal(&Request{
+				Key:     key,
+				Version: version,
+				Size:    100,
+			})
+			require.NoError(t, err)
+			resp, err := testClient.Post(base+"/caches", "application/json", bytes.NewReader(body))
+			require.NoError(t, err)
+			defer resp.Body.Close()
+			require.Equal(t, 200, resp.StatusCode)
+
+			got := struct {
+				CacheID uint64 `json:"cacheId"`
+			}{}
+			require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
+			id = got.CacheID
+		}
+
+		storageFile := filepath.Join(dir, "not-a-directory")
+		require.NoError(t, os.WriteFile(storageFile, []byte("blocked"), 0o600))
+		originalStorage := handler.storage
+		handler.storage = &Storage{rootDir: storageFile}
+		defer func() {
+			handler.storage = originalStorage
+		}()
+
+		req, err := http.NewRequest(http.MethodPatch,
+			fmt.Sprintf("%s/caches/%d", base, id), bytes.NewReader(make([]byte, 100)))
+		require.NoError(t, err)
+		req.Header.Set("Content-Type", "application/octet-stream")
+		req.Header.Set("Content-Range", "bytes 0-99/*")
+		resp, err := testClient.Do(req)
+		require.NoError(t, err)
+		defer resp.Body.Close()
+		require.Equal(t, 500, resp.StatusCode)
+
+		body, err := io.ReadAll(resp.Body)
+		require.NoError(t, err)
+		var got map[string]string
+		require.NoError(t, json.Unmarshal(body, &got))
+		assert.NotEmpty(t, got["error"])
+	})
+
 	t.Run("commit early", func(t *testing.T) {
 		key := strings.ToLower(t.Name())
 		version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
@@ -396,13 +445,6 @@ func TestHandler(t *testing.T) {
 		require.Equal(t, 404, resp.StatusCode)
 	})
 
-	t.Run("get with not exist id", func(t *testing.T) {
-		resp, err := testClient.Get(signArtifactURL(handler, 100))
-		require.NoError(t, err)
-		defer resp.Body.Close()
-		require.Equal(t, 404, resp.StatusCode)
-	})
-
 	t.Run("get with multiple keys", func(t *testing.T) {
 		version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
 		key := strings.ToLower(t.Name())
@@ -420,7 +462,8 @@ func TestHandler(t *testing.T) {
 			_, err := rand.Read(contents[i])
 			require.NoError(t, err)
 			uploadCacheNormally(t, base, keys[i], version, contents[i])
-			time.Sleep(time.Second) // ensure CreatedAt of caches are different
+			// ensure CreatedAt of caches are different, in upload order
+			backdateCache(t, handler, keys[i], time.Duration(len(contents)-i)*time.Second)
 		}
 
 		reqKeys := strings.Join([]string{
@@ -505,7 +548,8 @@ func TestHandler(t *testing.T) {
 			_, err := rand.Read(contents[i])
 			require.NoError(t, err)
 			uploadCacheNormally(t, base, keys[i], version, contents[i])
-			time.Sleep(time.Second) // ensure CreatedAt of caches are different
+			// ensure CreatedAt of caches are different, in upload order
+			backdateCache(t, handler, keys[i], time.Duration(len(contents)-i)*time.Second)
 		}
 
 		reqKeys := strings.Join([]string{
@@ -558,7 +602,8 @@ func TestHandler(t *testing.T) {
 			_, err := rand.Read(contents[i])
 			require.NoError(t, err)
 			uploadCacheNormally(t, base, keys[i], version, contents[i])
-			time.Sleep(time.Second) // ensure CreatedAt of caches are different
+			// ensure CreatedAt of caches are different, in upload order
+			backdateCache(t, handler, keys[i], time.Duration(len(contents)-i)*time.Second)
 		}
 
 		reqKeys := strings.Join([]string{
@@ -597,6 +642,20 @@ func TestHandler(t *testing.T) {
 	})
 }
 
+// backdateCache rewrites a cache's CreatedAt. It has one-second resolution, so age-ordering
+// tests set it directly instead of sleeping a second between uploads.
+func backdateCache(t *testing.T, handler *Handler, key string, age time.Duration) {
+	db, err := handler.openDB()
+	require.NoError(t, err)
+	defer db.Close()
+
+	var caches []*Cache
+	require.NoError(t, db.Find(&caches, bolthold.Where("Key").Eq(key)))
+	require.Len(t, caches, 1)
+	caches[0].CreatedAt = time.Now().Add(-age).Unix()
+	require.NoError(t, db.Update(caches[0].ID, caches[0]))
+}
+
 func uploadCacheNormally(t *testing.T, base, key, version string, content []byte) { //nolint:unparam // pre-existing issue from nektos/act
 	var id uint64
 	{
@@ -982,14 +1041,14 @@ func TestHandler_SecretPersistsAcrossRestarts(t *testing.T) {
 	first, err := StartHandler(dir, "127.0.0.1", 0, "", nil)
 	require.NoError(t, err)
 	exp := time.Now().Add(artifactURLTTL).Unix()
-	sig := first.computeSignature(42, exp)
+	sig := first.computeSignature("", 42, exp)
 	require.NoError(t, first.Close())
 
 	second, err := StartHandler(dir, "127.0.0.1", 0, "", nil)
 	require.NoError(t, err)
 	defer second.Close()
 
-	assert.Equal(t, sig, second.computeSignature(42, exp))
+	assert.Equal(t, sig, second.computeSignature("", 42, exp))
 }
 
 // TestHandler_ArtifactSignatureDownload is a happy-path round trip that

act/artifactcache/handler_v2.go

@@ -0,0 +1,268 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package artifactcache
+
+import (
+	"cmp"
+	"encoding/json"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+// The cache service v2 API. A client on this version talks twirp to
+// `github.actions.results.api.v1.CacheService` instead of the /_apis/artifactcache
+// endpoints, and uploads the archive to the returned URL with the Azure blob protocol.
+// Both API versions are served from the same store, so a repository keeps its cache
+// when a workflow moves between action versions.
+const (
+	cacheServiceV2Path = "/twirp/github.actions.results.api.v1.CacheService"
+
+	// blobPath authenticates by signature, because the client uploads without an
+	// Authorization header. Downloads are handed the v1 artifact URL instead.
+	blobPath = apiPath + "/blobs"
+
+	// blobUploadPurpose keeps an upload URL from being replayed to read an entry.
+	blobUploadPurpose = "upload:"
+
+	blobUploadURLTTL = time.Hour
+
+	// twirpInternal is the only error code that is not the client's fault.
+	twirpInternal = "internal"
+)
+
+func (h *Handler) registerV2Routes(router *httprouter.Router) {
+	router.POST(cacheServiceV2Path+"/CreateCacheEntry", h.bearerAuth(h.v2CreateCacheEntry))
+	router.POST(cacheServiceV2Path+"/FinalizeCacheEntryUpload", h.bearerAuth(h.v2FinalizeCacheEntryUpload))
+	router.POST(cacheServiceV2Path+"/GetCacheEntryDownloadURL", h.bearerAuth(h.v2GetCacheEntryDownloadURL))
+	router.PUT(blobPath+"/:id", h.signedAuth(blobUploadPurpose, h.v2UploadBlob))
+}
+
+// An entry that already exists is reported as not ok, which is how the client learns to skip
+// the upload.
+func (h *Handler) v2CreateCacheEntry(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+	cred := credFromContext(r.Context())
+	req, err := decodeTwirpRequest[v2CreateRequest](r)
+	if err != nil {
+		h.twirpError(w, r, "malformed_request", err)
+		return
+	}
+	if req.Key == "" || req.Version == "" {
+		h.twirpError(w, r, "invalid_argument", errors.New("key and version are required"))
+		return
+	}
+
+	db, err := h.openDB()
+	if err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+	defer db.Close()
+
+	// An exact (key, version) match means the entry is already cached; the client then skips
+	// the upload. A prefix match must not count here, or a shorter key would be reported as
+	// existing and silently never saved.
+	if existing, err := findExactCache(db, cred.Repo, req.Key, req.Version, true); err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	} else if existing != nil {
+		h.twirpNotOK(w, r)
+		return
+	}
+
+	now := time.Now().Unix()
+	cache := &Cache{
+		Repo:      cred.Repo,
+		Key:       req.Key,
+		Version:   req.Version,
+		Size:      -1, // the size is only known at finalize time
+		CreatedAt: now,
+		UsedAt:    now,
+	}
+	if err := insertCache(db, cache); err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+
+	h.responseJSON(w, r, http.StatusOK, map[string]any{
+		"ok":              true,
+		"signedUploadUrl": h.signedURL(blobPath, blobUploadPurpose, cache.ID, time.Now().Add(blobUploadURLTTL)),
+	})
+}
+
+func (h *Handler) v2FinalizeCacheEntryUpload(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+	cred := credFromContext(r.Context())
+	req, err := decodeTwirpRequest[v2FinalizeRequest](r)
+	if err != nil {
+		h.twirpError(w, r, "malformed_request", err)
+		return
+	}
+
+	db, err := h.openDB()
+	if err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+	defer db.Close()
+
+	cache, err := findExactCache(db, cred.Repo, req.Key, req.Version, false)
+	if err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+	if cache == nil {
+		h.twirpNotOK(w, r)
+		return
+	}
+	db.Close() // commitCache needs the store closed
+
+	cache.Size, _ = cmp.Or(req.SizeBytes, req.SizeBytesCamel).Int64()
+	if err := h.commitCache(cache); err != nil {
+		h.logger.Errorf("finalize cache %d (%s): %v", cache.ID, cache.Key, err)
+		h.twirpNotOK(w, r)
+		return
+	}
+
+	h.responseJSON(w, r, http.StatusOK, map[string]any{
+		"ok": true,
+		// int64 fields travel as strings in the proto JSON mapping.
+		"entryId": strconv.FormatUint(cache.ID, 10),
+	})
+}
+
+func (h *Handler) v2GetCacheEntryDownloadURL(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+	cred := credFromContext(r.Context())
+	req, err := decodeTwirpRequest[v2DownloadRequest](r)
+	if err != nil {
+		h.twirpError(w, r, "malformed_request", err)
+		return
+	}
+
+	db, err := h.openDB()
+	if err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+	defer db.Close()
+
+	cache, err := h.lookupCache(db, cred.Repo, req.keys(), req.Version)
+	if err != nil {
+		h.twirpError(w, r, twirpInternal, err)
+		return
+	}
+	if cache == nil {
+		h.twirpNotOK(w, r)
+		return
+	}
+
+	h.responseJSON(w, r, http.StatusOK, map[string]any{
+		"ok":                true,
+		"signedDownloadUrl": h.signedArtifactURL(cache.ID, time.Now().Add(artifactURLTTL)),
+		"matchedKey":        cache.Key,
+	})
+}
+
+// The archive arrives over the subset of the Azure blob API the toolkit uses: a small
+// cache is a single PUT, a large one is staged as blocks that a final block list puts
+// in order.
+func (h *Handler) v2UploadBlob(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
+	id, err := strconv.ParseUint(params.ByName("id"), 10, 64)
+	if err != nil {
+		h.responseJSON(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	if err := h.touchCache(id, true); err != nil {
+		h.responseJSON(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	query := r.URL.Query()
+	switch strings.ToLower(query.Get("comp")) {
+	case "block":
+		blockID := query.Get("blockid")
+		if blockID == "" {
+			h.responseJSON(w, r, http.StatusBadRequest, errors.New("missing blockid"))
+			return
+		}
+		err = h.storage.WriteBlock(id, blockID, r.Body)
+	case "blocklist":
+		var list struct{ Latest []string }
+		if err := xml.NewDecoder(io.LimitReader(r.Body, 8<<20)).Decode(&list); err != nil {
+			h.responseJSON(w, r, http.StatusBadRequest, fmt.Errorf("malformed block list: %w", err))
+			return
+		}
+		err = h.storage.OrderBlocks(id, list.Latest)
+	default:
+		err = h.storage.Write(id, 0, r.Body)
+	}
+	if err != nil {
+		h.responseJSON(w, r, http.StatusInternalServerError, err)
+		return
+	}
+
+	w.WriteHeader(http.StatusCreated)
+}
+
+// twirpNotOK is the negative answer all three endpoints share: no such entry to restore, no
+// reservation to finalize, or an entry that already exists and need not be uploaded again.
+func (h *Handler) twirpNotOK(w http.ResponseWriter, r *http.Request) {
+	h.responseJSON(w, r, http.StatusOK, map[string]any{"ok": false})
+}
+
+// twirpError reports in the shape a twirp client expects, so the toolkit surfaces the message
+// instead of a parse error.
+func (h *Handler) twirpError(w http.ResponseWriter, r *http.Request, code string, err error) {
+	h.logger.Debugf("%s %s: %v", r.Method, r.URL.Path, err)
+	status := http.StatusBadRequest
+	if code == twirpInternal {
+		status = http.StatusInternalServerError
+	}
+	h.responseJSON(w, r, status, map[string]any{"code": code, "msg": err.Error()})
+}
+
+// The twirp request bodies. The toolkit's client serialises with useProtoFieldName, so the proto
+// names are what arrive; the camelCase spellings of the same mapping are accepted too, as are
+// int64s sent as a bare number rather than the string the mapping prescribes.
+type (
+	v2CreateRequest struct {
+		Key     string `json:"key"`
+		Version string `json:"version"`
+	}
+
+	v2FinalizeRequest struct {
+		Key            string      `json:"key"`
+		Version        string      `json:"version"`
+		SizeBytes      json.Number `json:"size_bytes"`
+		SizeBytesCamel json.Number `json:"sizeBytes"`
+	}
+
+	v2DownloadRequest struct {
+		Key              string   `json:"key"`
+		Version          string   `json:"version"`
+		RestoreKeys      []string `json:"restore_keys"`
+		RestoreKeysCamel []string `json:"restoreKeys"`
+	}
+)
+
+func (d v2DownloadRequest) keys() []string {
+	restoreKeys := d.RestoreKeys
+	if len(restoreKeys) == 0 {
+		restoreKeys = d.RestoreKeysCamel
+	}
+	return append([]string{d.Key}, restoreKeys...)
+}
+
+func decodeTwirpRequest[T any](r *http.Request) (T, error) {
+	var req T
+	err := json.NewDecoder(io.LimitReader(r.Body, 1<<20)).Decode(&req)
+	return req, err
+}

act/artifactcache/handler_v2_test.go

@@ -0,0 +1,236 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package artifactcache
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// v2Call posts a twirp request to the cache service and returns the decoded response.
+// Field names are the proto ones, which is what the toolkit's client sends.
+func v2Call(t *testing.T, handler *Handler, client *http.Client, method string, request any) map[string]any {
+	t.Helper()
+
+	body, err := json.Marshal(request)
+	require.NoError(t, err)
+
+	resp, err := client.Post(handler.ExternalURL()+cacheServiceV2Path+"/"+method, "application/json", bytes.NewReader(body))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	require.Equal(t, http.StatusOK, resp.StatusCode)
+
+	got := map[string]any{}
+	require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
+	return got
+}
+
+// putBlob uploads to a signed URL and returns the status, so a test can assert a refusal.
+func putBlob(t *testing.T, url string, content []byte) int {
+	t.Helper()
+
+	req, err := http.NewRequestWithContext(t.Context(), http.MethodPut, url, bytes.NewReader(content))
+	require.NoError(t, err)
+	resp, err := http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	return resp.StatusCode
+}
+
+func getURL(t *testing.T, url string) []byte {
+	t.Helper()
+
+	req, err := http.NewRequestWithContext(t.Context(), http.MethodGet, url, nil)
+	require.NoError(t, err)
+	resp, err := http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	require.NoError(t, err)
+	return body
+}
+
+func startTestHandler(t *testing.T) *Handler {
+	t.Helper()
+
+	handler, err := StartHandler(filepath.Join(t.TempDir(), "artifactcache"), "127.0.0.1", 0, "", nil)
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = handler.Close() })
+	handler.RegisterJob(testToken, testRepo)
+	return handler
+}
+
+// saveV2 runs the reserve/upload/finalize sequence and returns the finalize response along
+// with the upload URL it used.
+func saveV2(t *testing.T, handler *Handler, key, version string, content []byte) (finalized map[string]any, uploadURL string) {
+	t.Helper()
+
+	created := v2Call(t, handler, testClient, "CreateCacheEntry", map[string]any{"key": key, "version": version})
+	require.Equal(t, true, created["ok"])
+	uploadURL, _ = created["signedUploadUrl"].(string)
+	require.NotEmpty(t, uploadURL)
+	require.Equal(t, http.StatusCreated, putBlob(t, uploadURL, content))
+
+	return v2Call(t, handler, testClient, "FinalizeCacheEntryUpload", map[string]any{
+		"key": key, "version": version,
+		"size_bytes": strconv.Itoa(len(content)),
+	}), uploadURL
+}
+
+// The whole round trip an actions/cache v2 client makes, plus the guarantees on the signed
+// URLs it is handed: unsigned requests are refused, an upload URL cannot be replayed to read
+// or to replace a finalized entry.
+func TestCacheServiceV2RoundTrip(t *testing.T) {
+	handler := startTestHandler(t)
+	content := []byte("the cached archive")
+
+	unsigned := fmt.Sprintf("%s%s/1", handler.ExternalURL(), blobPath)
+	assert.Equal(t, http.StatusUnauthorized, putBlob(t, unsigned, content))
+
+	finalized, uploadURL := saveV2(t, handler, "deps-v1", "abc123", content)
+	require.Equal(t, true, finalized["ok"])
+	assert.NotEmpty(t, finalized["entryId"])
+
+	// The upload URL outlives the finalize call, so replaying it must not poison the entry,
+	// and it is an upload URL only: nothing reads a blob back through it.
+	assert.Equal(t, http.StatusBadRequest, putBlob(t, uploadURL, []byte("poisoned")))
+	resp, err := http.Get(uploadURL) //nolint:noctx // the URL is the server under test
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusMethodNotAllowed, resp.StatusCode)
+
+	got := v2Call(t, handler, testClient, "GetCacheEntryDownloadURL", map[string]any{"key": "deps-v1", "version": "abc123"})
+	require.Equal(t, true, got["ok"])
+	assert.Equal(t, "deps-v1", got["matchedKey"])
+	downloadURL, _ := got["signedDownloadUrl"].(string)
+	require.NotEmpty(t, downloadURL)
+	assert.Equal(t, content, getURL(t, downloadURL))
+}
+
+// A large archive is staged as blocks and only put in order by the final block list, so
+// blocks that arrive out of order must still be assembled the way the client asked.
+func TestCacheServiceV2BlockUpload(t *testing.T) {
+	handler := startTestHandler(t)
+
+	created := v2Call(t, handler, testClient, "CreateCacheEntry", map[string]any{"key": "blocks", "version": "v1"})
+	uploadURL, _ := created["signedUploadUrl"].(string)
+	require.NotEmpty(t, uploadURL)
+
+	blocks := map[string][]byte{}
+	var order []string
+	for i, part := range []string{"hello ", "world", "!"} {
+		blockID := base64.StdEncoding.EncodeToString(fmt.Appendf(nil, "block-%d", i))
+		blocks[blockID] = []byte(part)
+		order = append(order, blockID)
+	}
+	// Upload in an order that is not the block list order.
+	for _, blockID := range []string{order[2], order[0], order[1]} {
+		require.Equal(t, http.StatusCreated, putBlob(t, uploadURL+"&comp=block&blockid="+blockID, blocks[blockID]))
+	}
+
+	var list bytes.Buffer
+	list.WriteString(`<?xml version="1.0" encoding="utf-8"?><BlockList>`)
+	for _, blockID := range order {
+		fmt.Fprintf(&list, "<Latest>%s</Latest>", blockID)
+	}
+	list.WriteString(`</BlockList>`)
+	require.Equal(t, http.StatusCreated, putBlob(t, uploadURL+"&comp=blocklist", list.Bytes()))
+
+	finalized := v2Call(t, handler, testClient, "FinalizeCacheEntryUpload", map[string]any{
+		"key": "blocks", "version": "v1", "size_bytes": len("hello world!"),
+	})
+	require.Equal(t, true, finalized["ok"])
+
+	got := v2Call(t, handler, testClient, "GetCacheEntryDownloadURL", map[string]any{"key": "blocks", "version": "v1"})
+	require.Equal(t, true, got["ok"])
+	assert.Equal(t, "hello world!", string(getURL(t, got["signedDownloadUrl"].(string))))
+}
+
+func TestCacheServiceV2Lookups(t *testing.T) {
+	handler := startTestHandler(t)
+	saved, _ := saveV2(t, handler, "deps-abc", "v1", []byte("x"))
+	require.Equal(t, true, saved["ok"])
+
+	t.Run("reports a miss for an unknown key", func(t *testing.T) {
+		got := v2Call(t, handler, testClient, "GetCacheEntryDownloadURL", map[string]any{"key": "nothing", "version": "v1"})
+		assert.Equal(t, false, got["ok"])
+	})
+
+	// The toolkit serialises with the proto field names; the camelCase spellings of the same
+	// proto JSON mapping are accepted alongside them.
+	for _, field := range []string{"restore_keys", "restoreKeys"} {
+		t.Run("restore keys match by prefix, spelled "+field, func(t *testing.T) {
+			got := v2Call(t, handler, testClient, "GetCacheEntryDownloadURL", map[string]any{
+				"key": "deps-zzz", field: []string{"deps-"}, "version": "v1",
+			})
+			require.Equal(t, true, got["ok"])
+			assert.Equal(t, "deps-abc", got["matchedKey"])
+		})
+	}
+
+	t.Run("an existing entry is not reserved twice", func(t *testing.T) {
+		again := v2Call(t, handler, testClient, "CreateCacheEntry", map[string]any{"key": "deps-abc", "version": "v1"})
+		assert.Equal(t, false, again["ok"])
+	})
+
+	// A key that is only a prefix of an existing one is a different entry, so the
+	// reservation check must be exact and not a restore-key prefix match, or the shorter
+	// key would be reported as existing and silently never saved.
+	t.Run("a prefix of an existing key is still reserved", func(t *testing.T) {
+		reserved := v2Call(t, handler, testClient, "CreateCacheEntry", map[string]any{"key": "deps", "version": "v1"})
+		require.Equal(t, true, reserved["ok"])
+		assert.NotEmpty(t, reserved["signedUploadUrl"])
+	})
+
+	t.Run("finalizing without a reservation is not ok", func(t *testing.T) {
+		got := v2Call(t, handler, testClient, "FinalizeCacheEntryUpload", map[string]any{
+			"key": "never-reserved", "version": "v1", "size_bytes": 1,
+		})
+		assert.Equal(t, false, got["ok"])
+	})
+
+	// The size the client declares is what Commit validates the assembled archive against.
+	t.Run("finalizing with the wrong size is not ok", func(t *testing.T) {
+		created := v2Call(t, handler, testClient, "CreateCacheEntry", map[string]any{"key": "wrong-size", "version": "v1"})
+		require.Equal(t, http.StatusCreated, putBlob(t, created["signedUploadUrl"].(string), []byte("four")))
+
+		got := v2Call(t, handler, testClient, "FinalizeCacheEntryUpload", map[string]any{
+			"key": "wrong-size", "version": "v1", "size_bytes": 99,
+		})
+		assert.Equal(t, false, got["ok"])
+	})
+
+	// Both API versions are served from one store, so an entry written through v2 is a hit for
+	// a v1 client asking for the same key and version.
+	t.Run("a v1 client sees an entry written through v2", func(t *testing.T) {
+		resp, err := testClient.Get(fmt.Sprintf("%s%s/cache?keys=deps-abc&version=v1", handler.ExternalURL(), apiPath))
+		require.NoError(t, err)
+		defer resp.Body.Close()
+		require.Equal(t, http.StatusOK, resp.StatusCode)
+
+		got := map[string]any{}
+		require.NoError(t, json.NewDecoder(resp.Body).Decode(&got))
+		assert.Equal(t, "deps-abc", got["cacheKey"])
+		assert.NotEmpty(t, got["archiveLocation"])
+	})
+
+	// The cache of one repository must stay invisible to another, as it does for the v1 API.
+	t.Run("another repository sees nothing", func(t *testing.T) {
+		handler.RegisterJob("other-runtime-token", "other/repo")
+		otherClient := &http.Client{Transport: &bearerTransport{token: "other-runtime-token"}}
+
+		got := v2Call(t, handler, otherClient, "GetCacheEntryDownloadURL", map[string]any{"key": "deps-abc", "version": "v1"})
+		assert.Equal(t, false, got["ok"])
+	})
+}

act/artifactcache/storage.go

@@ -5,12 +5,15 @@
 package artifactcache
 
 import (
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strconv"
+	"strings"
 )
 
 type Storage struct {
@@ -37,7 +40,10 @@ func (s *Storage) Exist(id uint64) (bool, error) {
 }
 
 func (s *Storage) Write(id uint64, offset int64, reader io.Reader) error {
-	name := s.tempName(id, offset)
+	return s.writeFile(s.tempName(id, offset), reader)
+}
+
+func (s *Storage) writeFile(name string, reader io.Reader) error {
 	if err := os.MkdirAll(filepath.Dir(name), 0o755); err != nil {
 		return err
 	}
@@ -51,6 +57,26 @@ func (s *Storage) Write(id uint64, offset int64, reader io.Reader) error {
 	return err
 }
 
+func (s *Storage) WriteBlock(id uint64, blockID string, reader io.Reader) error {
+	return s.writeFile(s.blockName(id, blockID), reader)
+}
+
+// OrderBlocks renames the staged blocks into the order the block list gives. A block the list
+// does not name keeps its staged name, which is how Commit leaves it out, as Azure drops it. One
+// rename pass is safe because a staged name always carries blockFilePrefix and a target name
+// never does, so no rename can collide with a block not yet moved.
+func (s *Storage) OrderBlocks(id uint64, blockIDs []string) error {
+	for i, blockID := range blockIDs {
+		if err := os.Rename(s.blockName(id, blockID), s.tempName(id, int64(i))); err != nil {
+			if os.IsNotExist(err) {
+				return fmt.Errorf("block %q of cache %d was never uploaded: %w", blockID, id, err)
+			}
+			return err
+		}
+	}
+	return nil
+}
+
 func (s *Storage) Commit(id uint64, size int64) (int64, error) {
 	defer func() {
 		_ = os.RemoveAll(s.tempDir(id))
@@ -65,6 +91,31 @@ func (s *Storage) Commit(id uint64, size int64) (int64, error) {
 	if err := os.MkdirAll(filepath.Dir(name), 0o755); err != nil {
 		return 0, err
 	}
+	written, err := assemble(name, tempNames)
+	if err != nil {
+		return 0, err
+	}
+	// If size is less than 0, it means the size is unknown.
+	// We can't check the size of the file, just skip the check.
+	// It happens when the request comes from old versions of actions, like `actions/cache@v2`.
+	if size >= 0 && written != size {
+		_ = os.Remove(name)
+		return 0, fmt.Errorf("broken file: %v != %v", written, size)
+	}
+	return written, nil
+}
+
+// assemble concatenates the uploaded parts into name. A single part, which is what the v2 API
+// produces below the client's block threshold, is already the whole archive and is moved.
+func assemble(name string, tempNames []string) (int64, error) {
+	if len(tempNames) == 1 {
+		info, err := os.Stat(tempNames[0])
+		if err != nil {
+			return 0, err
+		}
+		return info.Size(), os.Rename(tempNames[0], name)
+	}
+
 	file, err := os.Create(name)
 	if err != nil {
 		return 0, err
@@ -84,16 +135,6 @@ func (s *Storage) Commit(id uint64, size int64) (int64, error) {
 		}
 		written += n
 	}
-
-	// If size is less than 0, it means the size is unknown.
-	// We can't check the size of the file, just skip the check.
-	// It happens when the request comes from old versions of actions, like `actions/cache@v2`.
-	if size >= 0 && written != size {
-		_ = file.Close()
-		_ = os.Remove(name)
-		return 0, fmt.Errorf("broken file: %v != %v", written, size)
-	}
-
 	return written, nil
 }
 
@@ -119,6 +160,17 @@ func (s *Storage) tempName(id uint64, offset int64) string {
 	return filepath.Join(s.tempDir(id), fmt.Sprintf("%016x", offset))
 }
 
+// blockFilePrefix marks a staged, not yet ordered block, so that tempNames can keep it out of
+// Commit's name-ordered concatenation.
+const blockFilePrefix = "block-"
+
+func (s *Storage) blockName(id uint64, blockID string) string {
+	// The block id is client-chosen (base64), so it is hashed rather than trusted as a
+	// path element.
+	sum := sha256.Sum256([]byte(blockID))
+	return filepath.Join(s.tempDir(id), blockFilePrefix+hex.EncodeToString(sum[:]))
+}
+
 func (s *Storage) tempNames(id uint64) ([]string, error) {
 	dir := s.tempDir(id)
 	files, err := os.ReadDir(dir)
@@ -127,7 +179,7 @@ func (s *Storage) tempNames(id uint64) ([]string, error) {
 	}
 	var names []string
 	for _, v := range files {
-		if !v.IsDir() {
+		if !v.IsDir() && !strings.HasPrefix(v.Name(), blockFilePrefix) {
 			names = append(names, filepath.Join(dir, v.Name()))
 		}
 	}

act/artifacts/server_test.go

@@ -5,24 +5,25 @@
 package artifacts
 
 import (
-	"context"
+	"bytes"
+	"compress/gzip"
 	"encoding/json"
 	"fmt"
+	"io"
+	"maps"
 	"net/http"
 	"net/http/httptest"
+	"net/url"
 	"os"
-	"path"
 	"path/filepath"
 	"strings"
 	"testing"
 	"testing/fstest"
-
-	"gitea.com/gitea/runner/act/model"
-	"gitea.com/gitea/runner/act/runner"
+	"time"
 
 	"github.com/julienschmidt/httprouter"
-	log "github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type writableMapFile struct {
@@ -234,89 +235,133 @@ func TestDownloadArtifactFile(t *testing.T) {
 	assert.Equal("content", string(data))
 }
 
-type TestJobFileInfo struct {
-	workdir               string
-	workflowPath          string
-	eventName             string
-	errorMessage          string
-	platforms             map[string]string
-	containerArchitecture string
-}
-
-var (
-	artifactsPath = path.Join(os.TempDir(), "test-artifacts")
-	artifactsAddr = "127.0.0.1"
-	artifactsPort = "12345"
-)
-
+// TestArtifactFlow drives the real Serve() artifact server over a loopback socket, exercising
+// the same upload -> finalize -> list -> download protocol the upload-artifact/download-artifact
+// actions speak. Running it in-process (rather than from a job container) keeps it network-free
+// and reachable everywhere, including when the CI job is itself a container.
 func TestArtifactFlow(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
+	artifactPath := t.TempDir()
+
+	// Serve the exact routes Serve() wires up, on a real loopback socket via httptest. httptest
+	// picks a free port and Close() tears the server down synchronously — avoiding both the
+	// port-rebind race and Serve()'s detached ListenAndServe goroutine, which logger.Fatal()s
+	// (process exit) on a bind error and can outlive the test's temp-dir cleanup.
+	router := httprouter.New()
+	fsys := readWriteFSImpl{}
+	uploads(router, artifactPath, fsys)
+	downloads(router, artifactPath, fsys)
+	server := httptest.NewServer(router)
+	defer server.Close()
+
+	baseURL := server.URL
+	client := server.Client()
+	client.Timeout = 5 * time.Second
+
+	// request performs one HTTP call and returns the status and body. The default transport adds
+	// Accept-Encoding: gzip and transparently decompresses, so gzipped downloads come back plain.
+	request := func(t *testing.T, method, rawURL string, body io.Reader, header http.Header) (int, []byte) {
+		t.Helper()
+		req, err := http.NewRequest(method, rawURL, body)
+		require.NoError(t, err)
+		maps.Copy(req.Header, header)
+		resp, err := client.Do(req)
+		require.NoError(t, err)
+		defer resp.Body.Close()
+		data, err := io.ReadAll(resp.Body)
+		require.NoError(t, err)
+		return resp.StatusCode, data
 	}
 
-	ctx := context.Background()
+	t.Run("upload-and-download", func(t *testing.T) {
+		const runID, item, content = "1", "my-artifact/data.txt", "hello artifact\n"
 
-	cancel := Serve(ctx, artifactsPath, artifactsAddr, artifactsPort)
-	defer cancel()
+		status, data := request(t, http.MethodPost, baseURL+"/_apis/pipelines/workflows/"+runID+"/artifacts", nil, nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+		var prep FileContainerResourceURL
+		require.NoError(t, json.Unmarshal(data, &prep))
+		require.Equal(t, baseURL+"/upload/"+runID, prep.FileContainerResourceURL)
 
-	platforms := map[string]string{
-		"ubuntu-latest": "node:24-bookworm", // Don't use node:24-bookworm-slim because it doesn't have curl command, which is used in the tests
-	}
+		status, data = request(t, http.MethodPut, prep.FileContainerResourceURL+"?itemPath="+url.QueryEscape(item), strings.NewReader(content), nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+		var msg ResponseMessage
+		require.NoError(t, json.Unmarshal(data, &msg))
+		require.Equal(t, "success", msg.Message)
 
-	tables := []TestJobFileInfo{
-		{"testdata", "upload-and-download", "push", "", platforms, ""},
-		{"testdata", "GHSL-2023-004", "push", "", platforms, ""},
-	}
-	log.SetLevel(log.DebugLevel)
+		status, data = request(t, http.MethodPatch, baseURL+"/_apis/pipelines/workflows/"+runID+"/artifacts", nil, nil)
+		require.Equal(t, http.StatusOK, status, string(data))
 
-	for _, table := range tables {
-		runTestJobFile(ctx, t, table)
-	}
-}
+		status, data = request(t, http.MethodGet, baseURL+"/_apis/pipelines/workflows/"+runID+"/artifacts", nil, nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+		var list NamedFileContainerResourceURLResponse
+		require.NoError(t, json.Unmarshal(data, &list))
+		require.Equal(t, 1, list.Count)
+		require.Equal(t, "my-artifact", list.Value[0].Name)
 
-func runTestJobFile(ctx context.Context, t *testing.T, tjfi TestJobFileInfo) {
-	t.Run(tjfi.workflowPath, func(t *testing.T) {
-		fmt.Printf("::group::%s\n", tjfi.workflowPath) //nolint:forbidigo // pre-existing issue from nektos/act
+		status, data = request(t, http.MethodGet, list.Value[0].FileContainerResourceURL+"?itemPath=my-artifact", nil, nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+		var items ContainerItemResponse
+		require.NoError(t, json.Unmarshal(data, &items))
+		require.Len(t, items.Value, 1)
+		require.Equal(t, "file", items.Value[0].ItemType)
+		require.Equal(t, "my-artifact/data.txt", items.Value[0].Path)
 
-		if err := os.RemoveAll(artifactsPath); err != nil {
-			panic(err)
-		}
+		status, data = request(t, http.MethodGet, items.Value[0].ContentLocation, nil, nil)
+		require.Equal(t, http.StatusOK, status)
+		require.Equal(t, content, string(data))
 
-		workdir, err := filepath.Abs(tjfi.workdir)
-		assert.NoError(t, err, workdir) //nolint:testifylint // pre-existing issue from nektos/act
-		fullWorkflowPath := filepath.Join(workdir, tjfi.workflowPath)
-		runnerConfig := &runner.Config{
-			Workdir:               workdir,
-			BindWorkdir:           false,
-			EventName:             tjfi.eventName,
-			Platforms:             tjfi.platforms,
-			ReuseContainers:       false,
-			ContainerArchitecture: tjfi.containerArchitecture,
-			GitHubInstance:        "github.com",
-			ArtifactServerPath:    artifactsPath,
-			ArtifactServerAddr:    artifactsAddr,
-			ArtifactServerPort:    artifactsPort,
-		}
+		stored, err := os.ReadFile(filepath.Join(artifactPath, runID, "my-artifact", "data.txt"))
+		require.NoError(t, err)
+		require.Equal(t, content, string(stored))
+	})
 
-		runner, err := runner.New(runnerConfig)
-		assert.NoError(t, err, tjfi.workflowPath) //nolint:testifylint // pre-existing issue from nektos/act
+	t.Run("gzip-roundtrip", func(t *testing.T) {
+		const runID, item, content = "2", "logs/app.log", "compressed payload\n"
 
-		planner, err := model.NewWorkflowPlanner(fullWorkflowPath, true)
-		assert.NoError(t, err, fullWorkflowPath) //nolint:testifylint // pre-existing issue from nektos/act
+		var buf bytes.Buffer
+		gz := gzip.NewWriter(&buf)
+		_, err := gz.Write([]byte(content))
+		require.NoError(t, err)
+		require.NoError(t, gz.Close())
 
-		plan, err := planner.PlanEvent(tjfi.eventName)
-		if err == nil {
-			err = runner.NewPlanExecutor(plan)(ctx)
-			if tjfi.errorMessage == "" {
-				assert.NoError(t, err, fullWorkflowPath) //nolint:testifylint // pre-existing issue from nektos/act
-			} else {
-				assert.Error(t, err, tjfi.errorMessage) //nolint:testifylint // pre-existing issue from nektos/act
-			}
-		} else {
-			assert.Nil(t, plan)
-		}
+		status, data := request(t, http.MethodPut, baseURL+"/upload/"+runID+"?itemPath="+url.QueryEscape(item),
+			&buf, http.Header{"Content-Encoding": []string{"gzip"}})
+		require.Equal(t, http.StatusOK, status, string(data))
 
-		fmt.Println("::endgroup::") //nolint:forbidigo // pre-existing issue from nektos/act
+		// stored compressed, with the server's gzip marker suffix
+		_, err = os.Stat(filepath.Join(artifactPath, runID, "logs", "app.log.gz__"))
+		require.NoError(t, err)
+
+		status, data = request(t, http.MethodGet, baseURL+"/download/"+runID+"?itemPath=logs", nil, nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+		var items ContainerItemResponse
+		require.NoError(t, json.Unmarshal(data, &items))
+		require.Len(t, items.Value, 1)
+		require.Equal(t, "logs/app.log", items.Value[0].Path)
+
+		status, data = request(t, http.MethodGet, items.Value[0].ContentLocation, nil, nil)
+		require.Equal(t, http.StatusOK, status)
+		require.Equal(t, content, string(data))
+	})
+
+	// GHSL-2023-004: an itemPath that climbs out of the run directory must be neutralised so the
+	// blob cannot be written outside the artifact root.
+	t.Run("GHSL-2023-004", func(t *testing.T) {
+		const runID, content = "3", "contained\n"
+
+		status, data := request(t, http.MethodPut, baseURL+"/upload/"+runID+"?itemPath="+url.QueryEscape("../../escape.txt"),
+			strings.NewReader(content), nil)
+		require.Equal(t, http.StatusOK, status, string(data))
+
+		stored, err := os.ReadFile(filepath.Join(artifactPath, runID, "escape.txt"))
+		require.NoError(t, err)
+		require.Equal(t, content, string(stored))
+
+		_, err = os.Stat(filepath.Join(filepath.Dir(artifactPath), "escape.txt"))
+		require.True(t, os.IsNotExist(err), "upload escaped the artifact root")
+
+		status, data = request(t, http.MethodGet, baseURL+"/artifact/"+runID+"/escape.txt", nil, nil)
+		require.Equal(t, http.StatusOK, status)
+		require.Equal(t, content, string(data))
 	})
 }
 
@@ -345,6 +390,43 @@ func TestMkdirFsImplSafeResolve(t *testing.T) {
 	}
 }
 
+func TestReadWriteFSWritableAndAppendable(t *testing.T) {
+	fsys := readWriteFSImpl{}
+	name := filepath.Join(t.TempDir(), "nested", "artifact.txt")
+
+	w, err := fsys.OpenWritable(name)
+	require.NoError(t, err)
+	_, err = w.Write([]byte("first"))
+	require.NoError(t, err)
+	require.NoError(t, w.Close())
+
+	w, err = fsys.OpenAppendable(name)
+	require.NoError(t, err)
+	_, err = w.Write([]byte("-second"))
+	require.NoError(t, err)
+	require.NoError(t, w.Close())
+
+	got, err := os.ReadFile(name)
+	require.NoError(t, err)
+	require.Equal(t, "first-second", string(got))
+
+	w, err = fsys.OpenWritable(name)
+	require.NoError(t, err)
+	_, err = w.Write([]byte("replaced"))
+	require.NoError(t, err)
+	require.NoError(t, w.Close())
+
+	got, err = os.ReadFile(name)
+	require.NoError(t, err)
+	require.Equal(t, "replaced", string(got))
+}
+
+func TestServeEmptyArtifactPathReturnsCancelableNoop(t *testing.T) {
+	cancel := Serve(t.Context(), "", "127.0.0.1", "0")
+	require.NotNil(t, cancel)
+	cancel()
+}
+
 func TestDownloadArtifactFileUnsafePath(t *testing.T) {
 	assert := assert.New(t)
 

act/artifacts/testdata/GHSL-2023-004/artifacts.yml

@@ -1,39 +0,0 @@
-
-name: "GHSL-2023-0004"
-on: push
-
-jobs:
-  test-artifacts:
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "hello world" > test.txt
-      - name: curl upload
-        run: curl --silent --show-error --fail ${ACTIONS_RUNTIME_URL}upload/1?itemPath=../../my-artifact/secret.txt --upload-file test.txt
-      - uses: actions/download-artifact@v2
-        with:
-          name: my-artifact
-          path: test-artifacts
-      - name: 'Verify Artifact #1'
-        run: |
-          file="test-artifacts/secret.txt"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if [ "$(cat $file)" != "hello world" ] ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi
-      - name: Verify download should work by clean extra dots
-        run: curl --silent --show-error --fail --path-as-is -o out.txt ${ACTIONS_RUNTIME_URL}artifact/1/../../../1/my-artifact/secret.txt
-      - name: 'Verify download content'
-        run: |
-          file="out.txt"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if [ "$(cat $file)" != "hello world" ] ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi

act/artifacts/testdata/upload-and-download/artifacts.yml

@@ -1,230 +0,0 @@
-
-name: "Test that artifact uploads and downloads succeed"
-on: push
-
-jobs:
-  test-artifacts:
-    runs-on: ubuntu-latest
-    steps:
-      - run: mkdir -p path/to/artifact
-      - run: echo hello > path/to/artifact/world.txt
-      - uses: actions/upload-artifact@v2
-        with:
-          name: my-artifact
-          path: path/to/artifact/world.txt
-
-      - run: rm -rf path
-
-      - uses: actions/download-artifact@v2
-        with:
-          name: my-artifact
-      - name: Display structure of downloaded files
-        run: ls -la
-
-      # Test end-to-end by uploading two artifacts and then downloading them
-      - name: Create artifact files
-        run: |
-          mkdir -p path/to/dir-1
-          mkdir -p path/to/dir-2
-          mkdir -p path/to/dir-3
-          mkdir -p path/to/dir-5
-          mkdir -p path/to/dir-6
-          mkdir -p path/to/dir-7
-          echo "Lorem ipsum dolor sit amet" > path/to/dir-1/file1.txt
-          echo "Hello world from file #2" > path/to/dir-2/file2.txt
-          echo "This is a going to be a test for a large enough file that should get compressed with GZip. The @actions/artifact package uses GZip to upload files. This text should have a compression ratio greater than 100% so it should get uploaded using GZip" > path/to/dir-3/gzip.txt
-          dd if=/dev/random of=path/to/dir-5/file5.rnd bs=1024 count=1024
-          dd if=/dev/random of=path/to/dir-6/file6.rnd bs=1024 count=$((10*1024))
-          dd if=/dev/random of=path/to/dir-7/file7.rnd bs=1024 count=$((10*1024))
-
-      # Upload a single file artifact
-      - name: 'Upload artifact #1'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Artifact-A'
-          path: path/to/dir-1/file1.txt
-      
-      # Upload using a wildcard pattern, name should default to 'artifact' if not provided
-      - name: 'Upload artifact #2'
-        uses: actions/upload-artifact@v2
-        with:
-          path: path/**/dir*/
-      
-      # Upload a directory that contains a file that will be uploaded with GZip
-      - name: 'Upload artifact #3'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'GZip-Artifact'
-          path: path/to/dir-3/
-      
-      # Upload a directory that contains a file that will be uploaded with GZip
-      - name: 'Upload artifact #4'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Multi-Path-Artifact'
-          path: |
-            path/to/dir-1/*
-            path/to/dir-[23]/*
-            !path/to/dir-3/*.txt
-      
-      # Upload a mid-size file artifact
-      - name: 'Upload artifact #5'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Mid-Size-Artifact'
-          path: path/to/dir-5/file5.rnd
-      
-      # Upload a big file artifact
-      - name: 'Upload artifact #6'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Big-Artifact'
-          path: path/to/dir-6/file6.rnd
-
-      # Upload a big file artifact twice
-      - name: 'Upload artifact #7 (First)'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Big-Uploaded-Twice'
-          path: path/to/dir-7/file7.rnd
-
-      # Upload a big file artifact twice
-      - name: 'Upload artifact #7 (Second)'
-        uses: actions/upload-artifact@v2
-        with:
-          name: 'Big-Uploaded-Twice'
-          path: path/to/dir-7/file7.rnd
-
-      # Verify artifacts. Switch to download-artifact@v2 once it's out of preview
-      
-      # Download Artifact #1 and verify the correctness of the content
-      - name: 'Download artifact #1'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'Artifact-A'
-          path: some/new/path
-      
-      - name: 'Verify Artifact #1'
-        run: |
-          file="some/new/path/file1.txt"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if [ "$(cat $file)" != "Lorem ipsum dolor sit amet" ] ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi
-      
-      # Download Artifact #2 and verify the correctness of the content
-      - name: 'Download artifact #2'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'artifact'
-          path: some/other/path
-      
-      - name: 'Verify Artifact #2'
-        run: |
-          file1="some/other/path/to/dir-1/file1.txt"
-          file2="some/other/path/to/dir-2/file2.txt"
-          if [ ! -f $file1 -o ! -f $file2 ] ; then
-            echo "Expected files do not exist"
-            exit 1
-          fi
-          if [ "$(cat $file1)" != "Lorem ipsum dolor sit amet" -o "$(cat $file2)" != "Hello world from file #2" ] ; then
-            echo "File contents of downloaded artifacts are incorrect"
-            exit 1
-          fi
-      
-      # Download Artifact #3 and verify the correctness of the content
-      - name: 'Download artifact #3'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'GZip-Artifact'
-          path: gzip/artifact/path
-      
-      # Because a directory was used as input during the upload the parent directories, path/to/dir-3/, should not be included in the uploaded artifact
-      - name: 'Verify Artifact #3'
-        run: |
-          gzipFile="gzip/artifact/path/gzip.txt"
-          if [ ! -f $gzipFile ] ; then
-            echo "Expected file do not exist"
-            exit 1
-          fi
-          if [ "$(cat $gzipFile)" != "This is a going to be a test for a large enough file that should get compressed with GZip. The @actions/artifact package uses GZip to upload files. This text should have a compression ratio greater than 100% so it should get uploaded using GZip" ] ; then
-            echo "File contents of downloaded artifact is incorrect"
-            exit 1
-          fi
-      
-      - name: 'Download artifact #4'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'Multi-Path-Artifact'
-          path: multi/artifact
-      
-      - name: 'Verify Artifact #4'
-        run: |
-          file1="multi/artifact/dir-1/file1.txt"
-          file2="multi/artifact/dir-2/file2.txt"
-          if [ ! -f $file1 -o ! -f $file2 ] ; then
-            echo "Expected files do not exist"
-            exit 1
-          fi
-          if [ "$(cat $file1)" != "Lorem ipsum dolor sit amet" -o "$(cat $file2)" != "Hello world from file #2" ] ; then
-            echo "File contents of downloaded artifacts are incorrect"
-            exit 1
-          fi
-      
-      - name: 'Download artifact #5'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'Mid-Size-Artifact'
-          path: mid-size/artifact/path
-      
-      - name: 'Verify Artifact #5'
-        run: |
-          file="mid-size/artifact/path/file5.rnd"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if ! diff $file path/to/dir-5/file5.rnd ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi
-      
-      - name: 'Download artifact #6'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'Big-Artifact'
-          path: big/artifact/path
-      
-      - name: 'Verify Artifact #6'
-        run: |
-          file="big/artifact/path/file6.rnd"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if ! diff $file path/to/dir-6/file6.rnd ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi
-
-      - name: 'Download artifact #7'
-        uses: actions/download-artifact@v2
-        with:
-          name: 'Big-Uploaded-Twice'
-          path: big-uploaded-twice/artifact/path
-
-      - name: 'Verify Artifact #7'
-        run: |
-          file="big-uploaded-twice/artifact/path/file7.rnd"
-          if [ ! -f $file ] ; then
-            echo "Expected file does not exist"
-            exit 1
-          fi
-          if ! diff $file path/to/dir-7/file7.rnd ; then
-            echo "File contents of downloaded artifact are incorrect"
-            exit 1
-          fi

act/common/cartesian.go

@@ -4,6 +4,8 @@
 
 package common
 
+import "slices"
+
 // CartesianProduct takes map of lists and returns list of unique tuples
 func CartesianProduct(mapOfLists map[string][]any) []map[string]any {
 	listNames := make([]string, 0)
@@ -46,7 +48,7 @@ func cartN(a ...[]any) [][]any {
 		for j, n := range n {
 			pi[j] = a[j][n]
 		}
-		for j := len(n) - 1; j >= 0; j-- {
+		for j := range slices.Backward(n) {
 			n[j]++
 			if n[j] < len(a[j]) {
 				break

act/common/context_helpers_test.go

@@ -0,0 +1,73 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package common
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/sirupsen/logrus"
+)
+
+func TestDryrunContext(t *testing.T) {
+	ctx := context.Background()
+	if Dryrun(ctx) {
+		t.Fatal("plain context should not be dryrun")
+	}
+	if !Dryrun(WithDryrun(ctx, true)) {
+		t.Fatal("WithDryrun(true) should set dryrun")
+	}
+	if Dryrun(WithDryrun(ctx, false)) {
+		t.Fatal("WithDryrun(false) should clear dryrun")
+	}
+}
+
+func TestJobErrorContainer(t *testing.T) {
+	ctx := context.Background()
+	err := errors.New("job failed")
+
+	SetJobError(ctx, err)
+	if got := JobError(ctx); got != nil {
+		t.Fatalf("JobError without container = %v, want nil", got)
+	}
+
+	ctx = WithJobErrorContainer(ctx)
+	SetJobError(ctx, err)
+	if got := JobError(ctx); !errors.Is(got, err) {
+		t.Fatalf("JobError = %v, want %v", got, err)
+	}
+}
+
+func TestLoggerAndHookContext(t *testing.T) {
+	ctx := context.Background()
+	if Logger(ctx) != logrus.StandardLogger() {
+		t.Fatal("plain context should use standard logger")
+	}
+	if LoggerHook(ctx) != nil {
+		t.Fatal("plain context should not have a logger hook")
+	}
+
+	logger := logrus.New()
+	ctx = WithLogger(ctx, logger)
+	if Logger(ctx) != logger {
+		t.Fatal("WithLogger should set logger")
+	}
+
+	hook := testHook{}
+	ctx = WithLoggerHook(ctx, hook)
+	if LoggerHook(ctx) != hook {
+		t.Fatal("WithLoggerHook should set hook")
+	}
+}
+
+type testHook struct{}
+
+func (testHook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}
+
+func (testHook) Fire(*logrus.Entry) error {
+	return nil
+}

act/common/draw.go

@@ -1,146 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// Copyright 2020 The nektos/act Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package common
-
-import (
-	"fmt"
-	"io"
-	"os"
-	"strings"
-)
-
-// Style is a specific style
-type Style int
-
-// Styles
-const (
-	StyleDoubleLine = iota
-	StyleSingleLine
-	StyleDashedLine
-	StyleNoLine
-)
-
-// NewPen creates a new pen
-func NewPen(style Style, color int) *Pen {
-	bgcolor := 49
-	if os.Getenv("CLICOLOR") == "0" {
-		color = 0
-		bgcolor = 0
-	}
-	return &Pen{
-		style:   style,
-		color:   color,
-		bgcolor: bgcolor,
-	}
-}
-
-type styleDef struct {
-	cornerTL string
-	cornerTR string
-	cornerBL string
-	cornerBR string
-	lineH    string
-	lineV    string
-}
-
-var styleDefs = []styleDef{
-	{"\u2554", "\u2557", "\u255a", "\u255d", "\u2550", "\u2551"},
-	{"\u256d", "\u256e", "\u2570", "\u256f", "\u2500", "\u2502"},
-	{"\u250c", "\u2510", "\u2514", "\u2518", "\u254c", "\u254e"},
-	{" ", " ", " ", " ", " ", " "},
-}
-
-// Pen struct
-type Pen struct {
-	style   Style
-	color   int
-	bgcolor int
-}
-
-// Drawing struct
-type Drawing struct {
-	buf   *strings.Builder
-	width int
-}
-
-func (p *Pen) drawTopBars(buf io.Writer, labels ...string) {
-	style := styleDefs[p.style]
-	for _, label := range labels {
-		bar := strings.Repeat(style.lineH, len(label)+2)
-		fmt.Fprintf(buf, " ")
-		fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
-		fmt.Fprintf(buf, "%s%s%s", style.cornerTL, bar, style.cornerTR)
-		fmt.Fprintf(buf, "\x1b[%dm", 0)
-	}
-	fmt.Fprintf(buf, "\n")
-}
-
-func (p *Pen) drawBottomBars(buf io.Writer, labels ...string) {
-	style := styleDefs[p.style]
-	for _, label := range labels {
-		bar := strings.Repeat(style.lineH, len(label)+2)
-		fmt.Fprintf(buf, " ")
-		fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
-		fmt.Fprintf(buf, "%s%s%s", style.cornerBL, bar, style.cornerBR)
-		fmt.Fprintf(buf, "\x1b[%dm", 0)
-	}
-	fmt.Fprintf(buf, "\n")
-}
-
-func (p *Pen) drawLabels(buf io.Writer, labels ...string) {
-	style := styleDefs[p.style]
-	for _, label := range labels {
-		fmt.Fprintf(buf, " ")
-		fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
-		fmt.Fprintf(buf, "%s %s %s", style.lineV, label, style.lineV)
-		fmt.Fprintf(buf, "\x1b[%dm", 0)
-	}
-	fmt.Fprintf(buf, "\n")
-}
-
-// DrawArrow between boxes
-func (p *Pen) DrawArrow() *Drawing {
-	drawing := &Drawing{
-		buf:   new(strings.Builder),
-		width: 1,
-	}
-	fmt.Fprintf(drawing.buf, "\x1b[%dm", p.color)
-	fmt.Fprintf(drawing.buf, "\u2b07")
-	fmt.Fprintf(drawing.buf, "\x1b[%dm", 0)
-	return drawing
-}
-
-// DrawBoxes to draw boxes
-func (p *Pen) DrawBoxes(labels ...string) *Drawing {
-	width := 0
-	for _, l := range labels {
-		width += len(l) + 2 + 2 + 1
-	}
-	drawing := &Drawing{
-		buf:   new(strings.Builder),
-		width: width,
-	}
-	p.drawTopBars(drawing.buf, labels...)
-	p.drawLabels(drawing.buf, labels...)
-	p.drawBottomBars(drawing.buf, labels...)
-
-	return drawing
-}
-
-// Draw to writer
-func (d *Drawing) Draw(writer io.Writer, centerOnWidth int) {
-	padSize := max((centerOnWidth-d.GetWidth())/2, 0)
-	for l := range strings.SplitSeq(d.buf.String(), "\n") {
-		if len(l) > 0 {
-			padding := strings.Repeat(" ", padSize)
-			fmt.Fprintf(writer, "%s%s\n", padding, l)
-		}
-	}
-}
-
-// GetWidth of drawing
-func (d *Drawing) GetWidth() int {
-	return d.width
-}

act/common/executor.go

@@ -12,24 +12,6 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-// Warning that implements `error` but safe to ignore
-type Warning struct {
-	Message string
-}
-
-// Error the contract for error
-func (w Warning) Error() string {
-	return w.Message
-}
-
-// Warningf create a warning
-func Warningf(format string, args ...any) Warning {
-	w := Warning{
-		Message: fmt.Sprintf(format, args...),
-	}
-	return w
-}
-
 // Executor define contract for the steps of a workflow
 type Executor func(ctx context.Context) error
 
@@ -97,6 +79,12 @@ func NewErrorExecutor(err error) Executor {
 
 // NewParallelExecutor creates a new executor from a parallel of other executors
 func NewParallelExecutor(parallel int, executors ...Executor) Executor {
+	if len(executors) == 0 {
+		return func(ctx context.Context) error {
+			return ctx.Err()
+		}
+	}
+
 	return func(ctx context.Context) error {
 		work := make(chan Executor, len(executors))
 		errs := make(chan error, len(executors))
@@ -156,14 +144,8 @@ func NewParallelExecutor(parallel int, executors ...Executor) Executor {
 // Then runs another executor if this executor succeeds
 func (e Executor) Then(then Executor) Executor {
 	return func(ctx context.Context) error {
-		err := e(ctx)
-		if err != nil {
-			switch err.(type) {
-			case Warning:
-				Logger(ctx).Warning(err.Error())
-			default:
-				return err
-			}
+		if err := e(ctx); err != nil {
+			return err
 		}
 		if ctx.Err() != nil {
 			return ctx.Err()

act/common/executor_max_parallel_test.go

@@ -1,89 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package common
-
-import (
-	"context"
-	"sync"
-	"sync/atomic"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-)
-
-// Simple fast test that verifies max-parallel: 2 limits concurrency
-func TestMaxParallel2Quick(t *testing.T) {
-	ctx := context.Background()
-
-	var currentRunning atomic.Int32
-	var maxSimultaneous atomic.Int32
-
-	executors := make([]Executor, 4)
-	for i := range 4 {
-		executors[i] = func(ctx context.Context) error {
-			current := currentRunning.Add(1)
-
-			// Update max if needed
-			for {
-				maxValue := maxSimultaneous.Load()
-				if current <= maxValue || maxSimultaneous.CompareAndSwap(maxValue, current) {
-					break
-				}
-			}
-
-			time.Sleep(10 * time.Millisecond)
-			currentRunning.Add(-1)
-			return nil
-		}
-	}
-
-	err := NewParallelExecutor(2, executors...)(ctx)
-
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.LessOrEqual(t, maxSimultaneous.Load(), int32(2),
-		"Should not exceed max-parallel: 2")
-}
-
-// Test that verifies max-parallel: 1 enforces sequential execution
-func TestMaxParallel1Sequential(t *testing.T) {
-	ctx := context.Background()
-
-	var currentRunning atomic.Int32
-	var maxSimultaneous atomic.Int32
-	var executionOrder []int
-	var orderMutex sync.Mutex
-
-	executors := make([]Executor, 5)
-	for i := range 5 {
-		taskID := i
-		executors[i] = func(ctx context.Context) error {
-			current := currentRunning.Add(1)
-
-			// Track execution order
-			orderMutex.Lock()
-			executionOrder = append(executionOrder, taskID)
-			orderMutex.Unlock()
-
-			// Update max if needed
-			for {
-				maxValue := maxSimultaneous.Load()
-				if current <= maxValue || maxSimultaneous.CompareAndSwap(maxValue, current) {
-					break
-				}
-			}
-
-			time.Sleep(20 * time.Millisecond)
-			currentRunning.Add(-1)
-			return nil
-		}
-	}
-
-	err := NewParallelExecutor(1, executors...)(ctx)
-
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.Equal(t, int32(1), maxSimultaneous.Load(),
-		"max-parallel: 1 should only run 1 task at a time")
-	assert.Len(t, executionOrder, 5, "All 5 tasks should have executed")
-}

act/common/executor_parallel_advanced_test.go

@@ -1,283 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package common
-
-import (
-	"context"
-	"sync"
-	"sync/atomic"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-)
-
-// TestMaxParallelJobExecution tests actual job execution with max-parallel
-func TestMaxParallelJobExecution(t *testing.T) {
-	t.Run("MaxParallel=1 Sequential", func(t *testing.T) {
-		var currentRunning atomic.Int32
-		var maxConcurrent int32
-		var executionOrder []int
-		var mu sync.Mutex
-
-		executors := make([]Executor, 5)
-		for i := range 5 {
-			taskID := i
-			executors[i] = func(ctx context.Context) error {
-				current := currentRunning.Add(1)
-
-				// Track max concurrent
-				for {
-					maxValue := atomic.LoadInt32(&maxConcurrent)
-					if current <= maxValue || atomic.CompareAndSwapInt32(&maxConcurrent, maxValue, current) {
-						break
-					}
-				}
-
-				mu.Lock()
-				executionOrder = append(executionOrder, taskID)
-				mu.Unlock()
-
-				time.Sleep(10 * time.Millisecond)
-				currentRunning.Add(-1)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		err := NewParallelExecutor(1, executors...)(ctx)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		assert.Equal(t, int32(1), maxConcurrent, "Should never exceed 1 concurrent execution")
-		assert.Len(t, executionOrder, 5, "All tasks should execute")
-	})
-
-	t.Run("MaxParallel=3 Limited", func(t *testing.T) {
-		var currentRunning atomic.Int32
-		var maxConcurrent int32
-
-		executors := make([]Executor, 10)
-		for i := range 10 {
-			executors[i] = func(ctx context.Context) error {
-				current := currentRunning.Add(1)
-
-				for {
-					maxValue := atomic.LoadInt32(&maxConcurrent)
-					if current <= maxValue || atomic.CompareAndSwapInt32(&maxConcurrent, maxValue, current) {
-						break
-					}
-				}
-
-				time.Sleep(20 * time.Millisecond)
-				currentRunning.Add(-1)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		err := NewParallelExecutor(3, executors...)(ctx)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		assert.LessOrEqual(t, int(maxConcurrent), 3, "Should never exceed 3 concurrent executions")
-		assert.GreaterOrEqual(t, int(maxConcurrent), 1, "Should have at least 1 concurrent execution")
-	})
-
-	t.Run("MaxParallel=0 Uses1Worker", func(t *testing.T) {
-		var maxConcurrent int32
-		var currentRunning atomic.Int32
-
-		executors := make([]Executor, 5)
-		for i := range 5 {
-			executors[i] = func(ctx context.Context) error {
-				current := currentRunning.Add(1)
-
-				for {
-					maxValue := atomic.LoadInt32(&maxConcurrent)
-					if current <= maxValue || atomic.CompareAndSwapInt32(&maxConcurrent, maxValue, current) {
-						break
-					}
-				}
-
-				time.Sleep(10 * time.Millisecond)
-				currentRunning.Add(-1)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		// When maxParallel is 0 or negative, it defaults to 1
-		err := NewParallelExecutor(0, executors...)(ctx)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		assert.Equal(t, int32(1), maxConcurrent, "Should use 1 worker when max-parallel is 0")
-	})
-}
-
-// TestMaxParallelWithErrors tests error handling with max-parallel
-func TestMaxParallelWithErrors(t *testing.T) {
-	t.Run("OneTaskFailsOthersContinue", func(t *testing.T) {
-		var successCount int32
-
-		executors := make([]Executor, 5)
-		for i := range 5 {
-			taskID := i
-			executors[i] = func(ctx context.Context) error {
-				if taskID == 2 {
-					return assert.AnError
-				}
-				atomic.AddInt32(&successCount, 1)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		err := NewParallelExecutor(2, executors...)(ctx)
-
-		// Should return the error from task 2
-		assert.Error(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		// Other tasks should still execute
-		assert.Equal(t, int32(4), successCount, "4 tasks should succeed")
-	})
-
-	t.Run("ContextCancellation", func(t *testing.T) {
-		ctx, cancel := context.WithCancel(context.Background())
-
-		var startedCount int32
-		executors := make([]Executor, 10)
-		for i := range 10 {
-			executors[i] = func(ctx context.Context) error {
-				atomic.AddInt32(&startedCount, 1)
-				time.Sleep(100 * time.Millisecond)
-				return nil
-			}
-		}
-
-		// Cancel after a short delay
-		go func() {
-			time.Sleep(30 * time.Millisecond)
-			cancel()
-		}()
-
-		err := NewParallelExecutor(3, executors...)(ctx)
-		assert.Error(t, err)                     //nolint:testifylint // pre-existing issue from nektos/act
-		assert.ErrorIs(t, err, context.Canceled) //nolint:testifylint // pre-existing issue from nektos/act
-
-		// Not all tasks should start due to cancellation (but timing may vary)
-		// Just verify cancellation occurred
-		t.Logf("Started %d tasks before cancellation", startedCount)
-	})
-}
-
-// TestMaxParallelPerformance tests performance characteristics
-func TestMaxParallelPerformance(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping performance test in short mode")
-	}
-
-	t.Run("ParallelFasterThanSequential", func(t *testing.T) {
-		executors := make([]Executor, 10)
-		for i := range 10 {
-			executors[i] = func(ctx context.Context) error {
-				time.Sleep(50 * time.Millisecond)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-
-		// Sequential (max-parallel=1)
-		start := time.Now()
-		err := NewParallelExecutor(1, executors...)(ctx)
-		sequentialDuration := time.Since(start)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		// Parallel (max-parallel=5)
-		start = time.Now()
-		err = NewParallelExecutor(5, executors...)(ctx)
-		parallelDuration := time.Since(start)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		// Parallel should be significantly faster
-		assert.Less(t, parallelDuration, sequentialDuration/2,
-			"Parallel execution should be at least 2x faster")
-	})
-
-	t.Run("OptimalWorkerCount", func(t *testing.T) {
-		executors := make([]Executor, 20)
-		for i := range 20 {
-			executors[i] = func(ctx context.Context) error {
-				time.Sleep(10 * time.Millisecond)
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-
-		// Test with different worker counts
-		workerCounts := []int{1, 2, 5, 10, 20}
-		durations := make(map[int]time.Duration)
-
-		for _, count := range workerCounts {
-			start := time.Now()
-			err := NewParallelExecutor(count, executors...)(ctx)
-			durations[count] = time.Since(start)
-			assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-		}
-
-		// More workers should generally be faster (up to a point)
-		assert.Less(t, durations[5], durations[1], "5 workers should be faster than 1")
-		assert.Less(t, durations[10], durations[2], "10 workers should be faster than 2")
-	})
-}
-
-// TestMaxParallelResourceSharing tests resource sharing scenarios
-func TestMaxParallelResourceSharing(t *testing.T) {
-	t.Run("SharedResourceWithMutex", func(t *testing.T) {
-		var sharedCounter int
-		var mu sync.Mutex
-
-		executors := make([]Executor, 100)
-		for i := range 100 {
-			executors[i] = func(ctx context.Context) error {
-				mu.Lock()
-				sharedCounter++
-				mu.Unlock()
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		err := NewParallelExecutor(10, executors...)(ctx)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		assert.Equal(t, 100, sharedCounter, "All tasks should increment counter")
-	})
-
-	t.Run("ChannelCommunication", func(t *testing.T) {
-		resultChan := make(chan int, 50)
-
-		executors := make([]Executor, 50)
-		for i := range 50 {
-			taskID := i
-			executors[i] = func(ctx context.Context) error {
-				resultChan <- taskID
-				return nil
-			}
-		}
-
-		ctx := context.Background()
-		err := NewParallelExecutor(5, executors...)(ctx)
-		assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-		close(resultChan)
-
-		results := make(map[int]bool)
-		for result := range resultChan {
-			results[result] = true
-		}
-
-		assert.Len(t, results, 50, "All task IDs should be received")
-	})
-}

act/common/executor_test.go

@@ -7,11 +7,14 @@ package common
 import (
 	"context"
 	"errors"
+	"reflect"
+	"strings"
+	"sync"
 	"sync/atomic"
 	"testing"
-	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestNewWorkflow(t *testing.T) {
@@ -79,44 +82,58 @@ func TestNewConditionalExecutor(t *testing.T) {
 	assert.Equal(1, falseCount)
 }
 
-func TestNewParallelExecutor(t *testing.T) {
-	assert := assert.New(t)
+// concurrencyProbe returns an executor recording the peak number of concurrent copies. Copies
+// block until wantActive are in flight so the peak is exact without sleeping, and later copies
+// find the gate already open so the last one still finishes with no partner left.
+func concurrencyProbe(wantActive int32) (exec Executor, count, maxActive *atomic.Int32) {
+	var counted, active, peak atomic.Int32
+	var once sync.Once
+	reached := make(chan struct{})
 
-	ctx := context.Background()
-
-	var count, activeCount, maxCount atomic.Int32
-	emptyWorkflow := NewPipelineExecutor(func(ctx context.Context) error {
-		count.Add(1)
-
-		active := activeCount.Add(1)
+	return func(ctx context.Context) error {
+		counted.Add(1)
+		running := active.Add(1)
 		for {
-			m := maxCount.Load()
-			if active <= m || maxCount.CompareAndSwap(m, active) {
+			seen := peak.Load()
+			if running <= seen || peak.CompareAndSwap(seen, running) {
 				break
 			}
 		}
-		time.Sleep(2 * time.Second)
-		activeCount.Add(-1)
-
+		if running >= wantActive {
+			once.Do(func() { close(reached) })
+		}
+		<-reached
+		active.Add(-1)
 		return nil
-	})
+	}, &counted, &peak
+}
 
-	err := NewParallelExecutor(2, emptyWorkflow, emptyWorkflow, emptyWorkflow)(ctx)
+func TestNewParallelExecutor(t *testing.T) {
+	ctx := context.Background()
 
-	assert.Equal(int32(3), count.Load(), "should run all 3 executors")
-	assert.Equal(int32(2), maxCount.Load(), "should run at most 2 executors in parallel")
-	assert.NoError(err) //nolint:testifylint // pre-existing issue from nektos/act
+	exec, count, maxActive := concurrencyProbe(2)
+	require.NoError(t, NewParallelExecutor(2, exec, exec, exec)(ctx))
+	assert.Equal(t, int32(3), count.Load(), "should run all 3 executors")
+	assert.Equal(t, int32(2), maxActive.Load(), "should run at most 2 executors in parallel")
 
-	// Reset to test running the executor with 0 parallelism
-	count.Store(0)
-	activeCount.Store(0)
-	maxCount.Store(0)
+	// parallelism below 1 falls back to a single worker
+	exec, count, maxActive = concurrencyProbe(1)
+	require.NoError(t, NewParallelExecutor(0, exec, exec, exec)(ctx))
+	assert.Equal(t, int32(3), count.Load(), "should run all 3 executors")
+	assert.Equal(t, int32(1), maxActive.Load(), "should run at most 1 executor in parallel")
+}
 
-	errSingle := NewParallelExecutor(0, emptyWorkflow, emptyWorkflow, emptyWorkflow)(ctx)
+func TestNewParallelExecutorEmpty(t *testing.T) {
+	assert := assert.New(t)
 
-	assert.Equal(int32(3), count.Load(), "should run all 3 executors")
-	assert.Equal(int32(1), maxCount.Load(), "should run at most 1 executors in parallel")
-	assert.NoError(errSingle)
+	ctx := context.Background()
+	require.NoError(t, NewParallelExecutor(2)(ctx))
+
+	canceledCtx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	err := NewParallelExecutor(2)(canceledCtx)
+	assert.ErrorIs(err, context.Canceled)
 }
 
 func TestNewParallelExecutorFailed(t *testing.T) {
@@ -156,3 +173,60 @@ func TestNewParallelExecutorCanceled(t *testing.T) {
 	assert.Equal(int32(3), count.Load())
 	assert.Error(errExpected, err) //nolint:testifylint // pre-existing issue from nektos/act
 }
+
+func TestNewParallelExecutorRunsRemainingAfterFailure(t *testing.T) {
+	var successCount atomic.Int32
+	executors := make([]Executor, 5)
+	for i := range executors {
+		executors[i] = func(ctx context.Context) error {
+			if i == 2 {
+				return errors.New("fake error")
+			}
+			successCount.Add(1)
+			return nil
+		}
+	}
+
+	require.Error(t, NewParallelExecutor(2, executors...)(context.Background()))
+	assert.Equal(t, int32(4), successCount.Load(), "a failing executor must not stop the others")
+}
+
+func TestExecutorConditionalsAndFinally(t *testing.T) {
+	ctx := context.Background()
+	var calls []string
+	record := func(name string) Executor {
+		return func(ctx context.Context) error {
+			calls = append(calls, name)
+			return nil
+		}
+	}
+
+	require.NoError(t, record("if-true").If(func(context.Context) bool { return true })(ctx))
+	require.NoError(t, record("if-false").If(func(context.Context) bool { return false })(ctx))
+	require.NoError(t, record("if-not").IfNot(func(context.Context) bool { return false })(ctx))
+	require.NoError(t, record("if-bool").IfBool(true)(ctx))
+	require.NoError(t, record("main").Finally(record("finally"))(ctx))
+
+	want := []string{"if-true", "if-not", "if-bool", "main", "finally"}
+	if !reflect.DeepEqual(calls, want) {
+		t.Fatalf("calls = %v, want %v", calls, want)
+	}
+}
+
+func TestExecutorFinallyReturnsFinallyErrorWithOriginal(t *testing.T) {
+	mainErr := errors.New("main failed")
+	finalErr := errors.New("cleanup failed")
+
+	err := NewErrorExecutor(mainErr).Finally(NewErrorExecutor(finalErr))(context.Background())
+	require.Error(t, err)
+	if !strings.Contains(err.Error(), "cleanup failed") || !strings.Contains(err.Error(), "main failed") {
+		t.Fatalf("finally error = %q, want both cleanup and original error", err)
+	}
+}
+
+func TestConditionalNot(t *testing.T) {
+	cond := Conditional(func(context.Context) bool { return false })
+	if !cond.Not()(context.Background()) {
+		t.Fatal("inverted conditional should be true")
+	}
+}

act/common/file.go

@@ -1,77 +0,0 @@
-// Copyright 2022 The Gitea Authors. All rights reserved.
-// Copyright 2020 The nektos/act Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package common
-
-import (
-	"fmt"
-	"io"
-	"os"
-)
-
-// CopyFile copy file
-func CopyFile(source, dest string) (err error) {
-	sourcefile, err := os.Open(source)
-	if err != nil {
-		return err
-	}
-
-	defer sourcefile.Close()
-
-	destfile, err := os.Create(dest)
-	if err != nil {
-		return err
-	}
-
-	defer destfile.Close()
-
-	_, err = io.Copy(destfile, sourcefile)
-	if err == nil {
-		sourceinfo, err := os.Stat(source)
-		if err != nil {
-			_ = os.Chmod(dest, sourceinfo.Mode())
-		}
-	}
-
-	return err
-}
-
-// CopyDir recursive copy of directory
-func CopyDir(source, dest string) (err error) {
-	// get properties of source dir
-	sourceinfo, err := os.Stat(source)
-	if err != nil {
-		return err
-	}
-
-	// create dest dir
-
-	err = os.MkdirAll(dest, sourceinfo.Mode())
-	if err != nil {
-		return err
-	}
-
-	objects, err := os.ReadDir(source)
-
-	for _, obj := range objects {
-		sourcefilepointer := source + "/" + obj.Name()
-
-		destinationfilepointer := dest + "/" + obj.Name()
-
-		if obj.IsDir() {
-			// create sub-directories - recursively
-			err = CopyDir(sourcefilepointer, destinationfilepointer)
-			if err != nil {
-				fmt.Println(err) //nolint:forbidigo // pre-existing issue from nektos/act
-			}
-		} else {
-			// perform copy
-			err = CopyFile(sourcefilepointer, destinationfilepointer)
-			if err != nil {
-				fmt.Println(err) //nolint:forbidigo // pre-existing issue from nektos/act
-			}
-		}
-	}
-	return err
-}

act/common/git/git.go

@@ -16,6 +16,7 @@ import (
 	"sync"
 
 	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/internal/pkg/lock"
 
 	"github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/config"
@@ -32,7 +33,7 @@ var (
 	githubHTTPRegex     = regexp.MustCompile(`^https?://.*github.com.*/(.+)/(.+?)(?:.git)?$`)
 	githubSSHRegex      = regexp.MustCompile(`github.com[:/](.+)/(.+?)(?:.git)?$`)
 
-	cloneLocks sync.Map // key: clone target directory; value: *sync.Mutex
+	cloneLocks lock.Keyed[string] // key: clone target directory
 
 	ErrShortRef = errors.New("short SHA references are not supported")
 	ErrNoRepo   = errors.New("unable to find git repo")
@@ -43,10 +44,7 @@ var (
 // Callers reading files inside dir (e.g. tarring a checked-out action into a job container) must hold this lock too,
 // otherwise a concurrent NewGitCloneExecutor on the same dir can mutate the worktree mid-read.
 func AcquireCloneLock(dir string) func() {
-	v, _ := cloneLocks.LoadOrStore(dir, &sync.Mutex{})
-	mu := v.(*sync.Mutex)
-	mu.Lock()
-	return mu.Unlock
+	return cloneLocks.Lock(dir)
 }
 
 type Error struct {
@@ -66,8 +64,21 @@ func (e *Error) Commit() string {
 	return e.commit
 }
 
+// goGitMu serializes go-git repository access across the process. go-git is not safe for
+// concurrent use of the same repository (even read access decodes packfiles into shared
+// state), so parallel jobs inspecting the shared workdir repo race without this. The guarded
+// operations are fast local reads; gitea runs one job per process, so the lock is effectively
+// uncontended in production.
+var goGitMu sync.Mutex
+
 // FindGitRevision get the current git revision
 func FindGitRevision(ctx context.Context, file string) (shortSha, sha string, err error) {
+	goGitMu.Lock()
+	defer goGitMu.Unlock()
+	return findGitRevision(ctx, file)
+}
+
+func findGitRevision(ctx context.Context, file string) (shortSha, sha string, err error) {
 	logger := common.Logger(ctx)
 
 	gitDir, err := git.PlainOpenWithOptions(
@@ -99,10 +110,13 @@ func FindGitRevision(ctx context.Context, file string) (shortSha, sha string, er
 
 // FindGitRef get the current git ref
 func FindGitRef(ctx context.Context, file string) (string, error) {
+	goGitMu.Lock()
+	defer goGitMu.Unlock()
+
 	logger := common.Logger(ctx)
 
 	logger.Debugf("Loading revision from git directory")
-	_, ref, err := FindGitRevision(ctx, file)
+	_, ref, err := findGitRevision(ctx, file)
 	if err != nil {
 		return "", err
 	}
@@ -174,6 +188,8 @@ func FindGitRef(ctx context.Context, file string) (string, error) {
 
 // FindGithubRepo get the repo
 func FindGithubRepo(ctx context.Context, file, githubInstance, remoteName string) (string, error) {
+	goGitMu.Lock()
+	defer goGitMu.Unlock()
 	if remoteName == "" {
 		remoteName = "origin"
 	}
@@ -239,51 +255,77 @@ type NewGitCloneExecutorInput struct {
 	Token       string
 	OfflineMode bool
 
+	// Depth limits the clone/fetch to the given number of commits from the tip of the requested ref.
+	// 0 for full clone.
+	Depth int
+
+	// Quiet drops the informational clone line to debug level, for callers that log their own
+	// download summary (the setup section's action report).
+	Quiet bool
+
 	// For Gitea
 	InsecureSkipTLS bool
 }
 
-// CloneIfRequired ...
-func CloneIfRequired(ctx context.Context, refName plumbing.ReferenceName, input NewGitCloneExecutorInput, logger log.FieldLogger) (*git.Repository, error) {
+// CloneIfRequired returns the repository and a boolean indicating whether an existing local clone was reused.
+func CloneIfRequired(ctx context.Context, refName plumbing.ReferenceName, input NewGitCloneExecutorInput, logger log.FieldLogger) (*git.Repository, bool, error) {
 	r, err := git.PlainOpen(input.Dir)
-	if err != nil {
-		var progressWriter io.Writer
-		if isatty.IsTerminal(os.Stdout.Fd()) || isatty.IsCygwinTerminal(os.Stdout.Fd()) {
-			if entry, ok := logger.(*log.Entry); ok {
-				progressWriter = entry.WriterLevel(log.DebugLevel)
-			} else if lgr, ok := logger.(*log.Logger); ok {
-				progressWriter = lgr.WriterLevel(log.DebugLevel)
-			} else {
-				log.Errorf("Unable to get writer from logger (type=%T)", logger)
-				progressWriter = os.Stdout
-			}
+	if err == nil {
+		// Verify the cached clone still points to the resolved URL before reusing it.
+		remote, err := r.Remote("origin")
+		if err == nil && len(remote.Config().URLs) > 0 && remote.Config().URLs[0] == input.URL {
+			// Reuse existing clone
+			return r, true, nil
 		}
 
-		cloneOptions := git.CloneOptions{
-			URL:      input.URL,
-			Progress: progressWriter,
-
-			InsecureSkipTLS: input.InsecureSkipTLS, // For Gitea
-		}
-		if input.Token != "" {
-			cloneOptions.Auth = &http.BasicAuth{
-				Username: "token",
-				Password: input.Token,
-			}
-		}
-
-		r, err = git.PlainCloneContext(ctx, input.Dir, false, &cloneOptions)
 		if err != nil {
-			logger.Errorf("Unable to clone %v %s: %v", input.URL, refName, err)
-			return nil, err
+			logger.Debugf("Removing cached clone at %s because origin cannot be read: %v", input.Dir, err)
+		} else if len(remote.Config().URLs) == 0 {
+			logger.Debugf("Removing cached clone at %s because origin has no URL", input.Dir)
+		} else {
+			logger.Debugf("Removing cached clone at %s because origin URL changed from %s to %s", input.Dir, remote.Config().URLs[0], input.URL)
 		}
-
-		if err = os.Chmod(input.Dir, 0o755); err != nil {
-			return nil, err
+		if err := os.RemoveAll(input.Dir); err != nil {
+			return nil, false, fmt.Errorf("remove cached clone %s: %w", input.Dir, err)
 		}
 	}
 
-	return r, nil
+	var progressWriter io.Writer
+	if isatty.IsTerminal(os.Stdout.Fd()) || isatty.IsCygwinTerminal(os.Stdout.Fd()) {
+		if entry, ok := logger.(*log.Entry); ok {
+			progressWriter = entry.WriterLevel(log.DebugLevel)
+		} else if lgr, ok := logger.(*log.Logger); ok {
+			progressWriter = lgr.WriterLevel(log.DebugLevel)
+		} else {
+			log.Errorf("Unable to get writer from logger (type=%T)", logger)
+			progressWriter = os.Stdout
+		}
+	}
+
+	cloneOptions := git.CloneOptions{
+		URL:      input.URL,
+		Progress: progressWriter,
+
+		InsecureSkipTLS: input.InsecureSkipTLS, // For Gitea
+	}
+	if input.Token != "" {
+		cloneOptions.Auth = &http.BasicAuth{
+			Username: "token",
+			Password: input.Token,
+		}
+	}
+
+	r, err = cloneAtDepth(ctx, input, cloneOptions, logger)
+	if err != nil {
+		logger.Errorf("Unable to clone %v %s: %v", input.URL, refName, err)
+		return nil, false, err
+	}
+
+	if err = os.Chmod(input.Dir, 0o755); err != nil {
+		return nil, false, err
+	}
+
+	return r, false, nil
 }
 
 func gitOptions(token string) (fetchOptions git.FetchOptions, pullOptions git.PullOptions) {
@@ -307,13 +349,17 @@ func gitOptions(token string) (fetchOptions git.FetchOptions, pullOptions git.Pu
 func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 	return func(ctx context.Context) error {
 		logger := common.Logger(ctx)
-		logger.Infof("git clone '%s' # ref=%s", input.URL, input.Ref)
+		if input.Quiet {
+			logger.Debugf("git clone '%s' # ref=%s", input.URL, input.Ref)
+		} else {
+			logger.Infof("git clone '%s' # ref=%s", input.URL, input.Ref)
+		}
 		logger.Debugf("  cloning %s to %s", input.URL, input.Dir)
 
 		defer AcquireCloneLock(input.Dir)()
 
 		refName := plumbing.ReferenceName("refs/heads/" + input.Ref)
-		r, err := CloneIfRequired(ctx, refName, input, logger)
+		r, reused, err := CloneIfRequired(ctx, refName, input, logger)
 		if err != nil {
 			return err
 		}
@@ -328,6 +374,16 @@ func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 			pullOptions.InsecureSkipTLS = true
 		}
 
+		// Action clones only ever need the tip commit, so keep a shallow cache cheap on update at depth 1 regardless of its original depth
+		// Turning action_shallow_clone off does not convert an existing shallow cache; evict it for a full clone.
+		shallow := isShallow(r)
+		if shallow {
+			fetchOptions.Depth = 1
+			if spec, ok := shallowFetchRefSpec(r, input.Ref); ok {
+				fetchOptions.RefSpecs = []config.RefSpec{spec}
+			}
+		}
+
 		if !isOfflineMode {
 			err = r.Fetch(&fetchOptions)
 			if err != nil && !errors.Is(err, git.NoErrAlreadyUpToDate) {
@@ -338,10 +394,10 @@ func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 		var hash *plumbing.Hash
 		rev := plumbing.Revision(input.Ref)
 		if hash, err = r.ResolveRevision(rev); err != nil {
+			// ResolveRevision returns a nil hash on error, and a branch ref legitimately fails
+			// here (no local refs/heads/<ref>); the duck-typing below resolves it.
 			logger.Errorf("Unable to resolve %s: %v", input.Ref, err)
-		}
-
-		if hash.String() != input.Ref && strings.HasPrefix(hash.String(), input.Ref) {
+		} else if hash.String() != input.Ref && strings.HasPrefix(hash.String(), input.Ref) {
 			return &Error{
 				err:    ErrShortRef,
 				commit: hash.String(),
@@ -392,12 +448,20 @@ func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 				return err
 			}
 		}
-		if !isOfflineMode {
+
+		reusedMsg := ""
+
+		switch {
+		case !isOfflineMode && !shallow:
+			// In shallow mode the depth-limited fetch above already advanced the ref.
 			if err = w.Pull(&pullOptions); err != nil && err != git.NoErrAlreadyUpToDate {
 				logger.Debugf("Unable to pull %s: %v", refName, err)
 			}
+		case isOfflineMode && reused:
+			reusedMsg = " (reused in offline mode)"
 		}
-		logger.Debugf("Cloned %s to %s", input.URL, input.Dir)
+
+		logger.Debugf("Cloned %s to %s%s", input.URL, input.Dir, reusedMsg)
 
 		if hash.String() != input.Ref && refType == "branch" {
 			logger.Debugf("Provided ref is not a sha. Updating branch ref after pull")
@@ -426,3 +490,53 @@ func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 		return nil
 	}
 }
+
+// cloneAtDepth clones input.URL into input.Dir using opts.
+// With input.Depth > 0 it first tries a shallow, single-branch clone of input.Ref, falling back when error.
+func cloneAtDepth(ctx context.Context, input NewGitCloneExecutorInput, opts git.CloneOptions, logger log.FieldLogger) (*git.Repository, error) {
+	if input.Depth > 0 {
+		for _, refName := range []plumbing.ReferenceName{
+			plumbing.NewBranchReferenceName(input.Ref),
+			plumbing.NewTagReferenceName(input.Ref),
+		} {
+			shallowOpts := opts
+			shallowOpts.Depth = input.Depth
+			shallowOpts.SingleBranch = true
+			shallowOpts.ReferenceName = refName
+			shallowOpts.Tags = git.NoTags
+
+			r, err := git.PlainCloneContext(ctx, input.Dir, false, &shallowOpts)
+			if err == nil {
+				return r, nil
+			}
+			logger.Debugf("Shallow clone of %s as %s failed: %v", input.URL, refName, err)
+			if rmErr := os.RemoveAll(input.Dir); rmErr != nil {
+				return nil, fmt.Errorf("remove partial clone %s: %w", input.Dir, rmErr)
+			}
+		}
+		logger.Debugf("Falling back to a full clone of %s for ref %q", input.URL, input.Ref)
+	}
+
+	return git.PlainCloneContext(ctx, input.Dir, false, &opts)
+}
+
+// isShallow reports whether the local repository was cloned with a limited depth.
+func isShallow(r *git.Repository) bool {
+	shallows, err := r.Storer.Shallow()
+	return err == nil && len(shallows) > 0
+}
+
+// shallowFetchRefSpec returns the single refspec that updates only input.Ref, keeping a shallow clone from re-downloading every branch's history.
+// ok is false when the ref is not present locally as a tag or remote-tracking branch, in which case the broad default refspec is used.
+func shallowFetchRefSpec(r *git.Repository, ref string) (config.RefSpec, bool) {
+	tagRef := plumbing.NewTagReferenceName(ref)
+	if _, err := r.Reference(tagRef, false); err == nil {
+		return config.RefSpec(fmt.Sprintf("+%s:%s", tagRef, tagRef)), true
+	}
+	remoteRef := plumbing.NewRemoteReferenceName("origin", ref)
+	if _, err := r.Reference(remoteRef, false); err == nil {
+		branchRef := plumbing.NewBranchReferenceName(ref)
+		return config.RefSpec(fmt.Sprintf("+%s:%s", branchRef, remoteRef)), true
+	}
+	return "", false
+}

act/common/git/git_test.go

@@ -10,13 +10,16 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strconv"
 	"strings"
-	"sync"
 	"syscall"
 	"testing"
 	"time"
 
+	"gitea.com/gitea/runner/act/common"
+
 	log "github.com/sirupsen/logrus"
+	logrustest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -50,8 +53,11 @@ func TestFindGitSlug(t *testing.T) {
 	}
 }
 
-func testDir(t *testing.T) string {
-	return t.TempDir()
+func TestErrorWrapsCommitAndCause(t *testing.T) {
+	err := &Error{err: ErrShortRef, commit: "abc123"}
+	require.Equal(t, ErrShortRef.Error(), err.Error())
+	require.ErrorIs(t, err, ErrShortRef)
+	require.Equal(t, "abc123", err.Commit())
 }
 
 func cleanGitHooks(dir string) error {
@@ -78,8 +84,7 @@ func cleanGitHooks(dir string) error {
 func TestFindGitRemoteURL(t *testing.T) {
 	assert := assert.New(t)
 
-	basedir := testDir(t)
-	gitConfig()
+	basedir := t.TempDir()
 	err := gitCmd("init", basedir)
 	assert.NoError(err) //nolint:testifylint // pre-existing issue from nektos/act
 	err = cleanGitHooks(basedir)
@@ -101,9 +106,24 @@ func TestFindGitRemoteURL(t *testing.T) {
 	assert.Equal(remoteURL, u)
 }
 
+func TestFindGithubRepoUsesOriginAndCustomRemote(t *testing.T) {
+	basedir := t.TempDir()
+	require.NoError(t, gitCmd("init", basedir))
+	require.NoError(t, cleanGitHooks(basedir))
+	require.NoError(t, gitCmd("-C", basedir, "remote", "add", "origin", "https://github.com/owner/repo.git"))
+	require.NoError(t, gitCmd("-C", basedir, "remote", "add", "ghe", "git@git.example.com:team/project.git"))
+
+	slug, err := FindGithubRepo(context.Background(), basedir, "github.com", "")
+	require.NoError(t, err)
+	require.Equal(t, "owner/repo", slug)
+
+	slug, err = FindGithubRepo(context.Background(), basedir, "git.example.com", "ghe")
+	require.NoError(t, err)
+	require.Equal(t, "team/project", slug)
+}
+
 func TestGitFindRef(t *testing.T) {
-	basedir := testDir(t)
-	gitConfig()
+	basedir := t.TempDir()
 
 	for name, tt := range map[string]struct {
 		Prepare func(t *testing.T, dir string)
@@ -180,36 +200,55 @@ func TestGitFindRef(t *testing.T) {
 }
 
 func TestGitCloneExecutor(t *testing.T) {
+	// Build a local bare "remote" so this runs offline and fast. The cases below mirror
+	// the tag/branch/sha/short-sha ref paths the executor handles, formerly exercised by
+	// cloning actions/checkout and anchore/scan-action over the network.
+	remoteDir := t.TempDir()
+	require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
+
+	workDir := t.TempDir()
+	require.NoError(t, gitCmd("clone", remoteDir, workDir))
+	require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "main"))
+	require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", "initial"))
+	require.NoError(t, gitCmd("-C", workDir, "tag", "v2"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "-u", "origin", "main"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "origin", "v2"))
+
+	// A branch with a dash in the name (mirrors the historical scan-action@act-fails case).
+	require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "act-fails"))
+	require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", "branch-commit"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "origin", "act-fails"))
+
+	out, err := exec.Command("git", "-C", workDir, "rev-parse", "main").Output()
+	require.NoError(t, err)
+	fullSha := strings.TrimSpace(string(out))
+
 	for name, tt := range map[string]struct {
-		Err      error
-		URL, Ref string
+		Err error
+		Ref string
 	}{
 		"tag": {
 			Err: nil,
-			URL: "https://github.com/actions/checkout",
 			Ref: "v2",
 		},
 		"branch": {
 			Err: nil,
-			URL: "https://github.com/anchore/scan-action",
 			Ref: "act-fails",
 		},
 		"sha": {
 			Err: nil,
-			URL: "https://github.com/actions/checkout",
-			Ref: "5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f", // v2
+			Ref: fullSha,
 		},
 		"short-sha": {
-			Err: &Error{ErrShortRef, "5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f"},
-			URL: "https://github.com/actions/checkout",
-			Ref: "5a4ac90", // v2
+			Err: &Error{ErrShortRef, fullSha},
+			Ref: fullSha[:7],
 		},
 	} {
 		t.Run(name, func(t *testing.T) {
 			clone := NewGitCloneExecutor(NewGitCloneExecutorInput{
-				URL: tt.URL,
+				URL: remoteDir,
 				Ref: tt.Ref,
-				Dir: testDir(t),
+				Dir: t.TempDir(),
 			})
 
 			err := clone(context.Background())
@@ -223,13 +262,56 @@ func TestGitCloneExecutor(t *testing.T) {
 	}
 }
 
+func TestGitCloneExecutorReclonesWhenOriginURLChanges(t *testing.T) {
+	createRemote := func(message string) string {
+		remoteDir := t.TempDir()
+		require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
+
+		workDir := t.TempDir()
+		require.NoError(t, gitCmd("clone", remoteDir, workDir))
+		require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "main"))
+		require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", message))
+		require.NoError(t, gitCmd("-C", workDir, "push", "-u", "origin", "main"))
+
+		return remoteDir
+	}
+
+	oldRemoteDir := createRemote("old-action")
+	newRemoteDir := createRemote("new-action")
+	cacheDir := t.TempDir()
+
+	require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+		URL: oldRemoteDir,
+		Ref: "main",
+		Dir: cacheDir,
+	})(t.Context()))
+
+	markerPath := filepath.Join(cacheDir, "stale-marker")
+	require.NoError(t, os.WriteFile(markerPath, []byte("stale"), 0o644))
+
+	require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+		URL: newRemoteDir,
+		Ref: "main",
+		Dir: cacheDir,
+	})(t.Context()))
+
+	originURL, err := findGitRemoteURL(t.Context(), cacheDir, "origin")
+	require.NoError(t, err)
+	assert.Equal(t, newRemoteDir, originURL)
+
+	out, err := exec.Command("git", "-C", cacheDir, "log", "--oneline", "-1", "--format=%s").Output()
+	require.NoError(t, err)
+	assert.Equal(t, "new-action", strings.TrimSpace(string(out)))
+
+	_, err = os.Stat(markerPath)
+	require.True(t, os.IsNotExist(err), "stale cached directory should be removed before recloning")
+}
+
 func TestGitCloneExecutorNonFastForwardRef(t *testing.T) {
 	// Simulate the scenario where a remote ref (e.g. a GitHub PR head ref) changes
 	// non-fast-forward between two fetches. Before the fix, the fetch used Force=false,
 	// causing go-git to return ErrForceNeeded and short-circuit the checkout.
 
-	gitConfig()
-
 	// Create a bare "remote" repo with an initial commit on main and a feature branch.
 	remoteDir := t.TempDir()
 	require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
@@ -279,22 +361,195 @@ func TestGitCloneExecutorNonFastForwardRef(t *testing.T) {
 	assert.Equal(t, "second", strings.TrimSpace(string(out)), "working tree should be at the latest commit")
 }
 
-func gitConfig() {
-	if os.Getenv("GITHUB_ACTIONS") == "true" {
-		var err error
-		if err = gitCmd("config", "--global", "user.email", "test@test.com"); err != nil {
-			log.Error(err)
-		}
-		if err = gitCmd("config", "--global", "user.name", "Unit Test"); err != nil {
-			log.Error(err)
-		}
+func TestGitCloneExecutorOfflineMode(t *testing.T) {
+	// Build a local "remote" with a single commit on main.
+	remoteDir := t.TempDir()
+	require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
+	workDir := t.TempDir()
+	require.NoError(t, gitCmd("clone", remoteDir, workDir))
+	require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "main"))
+	require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", "initial"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "-u", "origin", "main"))
+
+	// Prime the cache with an online clone of main.
+	cacheDir := t.TempDir()
+	require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+		URL: remoteDir,
+		Ref: "main",
+		Dir: cacheDir,
+	})(context.Background()))
+
+	t.Run("cached branch resolves without fetching", func(t *testing.T) {
+		// Offline reuse of a cached branch must succeed even though ResolveRevision(input.Ref)
+		// finds no local refs/heads/<ref>.
+		err := NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL:         remoteDir,
+			Ref:         "main",
+			Dir:         cacheDir,
+			OfflineMode: true,
+		})(context.Background())
+		require.NoError(t, err)
+
+		out, err := exec.Command("git", "-C", cacheDir, "log", "--oneline", "-1", "--format=%s").Output()
+		require.NoError(t, err)
+		assert.Equal(t, "initial", strings.TrimSpace(string(out)))
+	})
+
+	t.Run("unresolvable cached ref returns error", func(t *testing.T) {
+		// The ref was never cached; offline mode cannot resolve it and must return an error.
+		err := NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL:         remoteDir,
+			Ref:         "never-fetched",
+			Dir:         cacheDir,
+			OfflineMode: true,
+		})(context.Background())
+		require.Error(t, err)
+	})
+}
+
+func TestGitCloneExecutorQuietDemotesCloneLine(t *testing.T) {
+	remoteDir := t.TempDir()
+	require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
+	workDir := t.TempDir()
+	require.NoError(t, gitCmd("clone", remoteDir, workDir))
+	require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "main"))
+	require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", "initial"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "-u", "origin", "main"))
+
+	// Quiet callers report the download themselves, so the clone line must not reach the job log.
+	for name, quiet := range map[string]bool{"quiet": true, "not quiet": false} {
+		t.Run(name, func(t *testing.T) {
+			logger, hook := logrustest.NewNullLogger()
+			logger.SetLevel(log.InfoLevel)
+			ctx := common.WithLogger(context.Background(), logger.WithField("job", "j1"))
+
+			require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+				URL:   remoteDir,
+				Ref:   "main",
+				Dir:   t.TempDir(),
+				Quiet: quiet,
+			})(ctx))
+
+			var cloneLines int
+			for _, entry := range hook.AllEntries() {
+				if strings.HasPrefix(entry.Message, "git clone ") {
+					cloneLines++
+				}
+			}
+			if quiet {
+				assert.Zero(t, cloneLines)
+			} else {
+				assert.Equal(t, 1, cloneLines)
+			}
+		})
 	}
 }
 
+func TestGitCloneExecutorShallow(t *testing.T) {
+	// Build a local "remote" with several commits on main plus a tag, so a full clone would pull noticeably more history than a shallow one.
+	remoteDir := t.TempDir()
+	require.NoError(t, gitCmd("init", "--bare", "--initial-branch=main", remoteDir))
+	workDir := t.TempDir()
+	require.NoError(t, gitCmd("clone", remoteDir, workDir))
+	require.NoError(t, gitCmd("-C", workDir, "checkout", "-b", "main"))
+	for _, m := range []string{"c1", "c2", "c3"} {
+		require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", m))
+	}
+	require.NoError(t, gitCmd("-C", workDir, "tag", "v1"))
+	sha := gitRevParse(t, workDir, "HEAD~1") // c2, a SHA that go-git cannot shallow-clone
+	require.NoError(t, gitCmd("-C", workDir, "push", "-u", "origin", "main"))
+	require.NoError(t, gitCmd("-C", workDir, "push", "origin", "v1"))
+
+	shallowMarker := func(dir string) string { return filepath.Join(dir, ".git", "shallow") }
+
+	t.Run("branch is cloned shallowly", func(t *testing.T) {
+		dir := t.TempDir()
+		require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL: remoteDir, Ref: "main", Dir: dir, Depth: 1,
+		})(t.Context()))
+		assert.FileExists(t, shallowMarker(dir), "clone should be shallow")
+		assert.Equal(t, 1, gitRevCount(t, dir), "only the tip commit should be present")
+		assert.Equal(t, "c3", gitHeadSubject(t, dir))
+	})
+
+	t.Run("tag is cloned shallowly", func(t *testing.T) {
+		dir := t.TempDir()
+		require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL: remoteDir, Ref: "v1", Dir: dir, Depth: 1,
+		})(t.Context()))
+		assert.FileExists(t, shallowMarker(dir), "clone should be shallow")
+		assert.Equal(t, 1, gitRevCount(t, dir))
+		assert.Equal(t, "c3", gitHeadSubject(t, dir))
+	})
+
+	t.Run("SHA falls back to a full clone", func(t *testing.T) {
+		dir := t.TempDir()
+		require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL: remoteDir, Ref: sha, Dir: dir, Depth: 1,
+		})(t.Context()))
+		// go-git cannot shallow-clone a raw SHA, so it falls back to a full clone; the absence of a shallow marker proves the fallback happened.
+		assert.NoFileExists(t, shallowMarker(dir), "a SHA ref must not produce a shallow clone")
+		assert.Equal(t, sha, gitRevParse(t, dir, "HEAD"))
+	})
+
+	t.Run("moving branch updates while staying shallow", func(t *testing.T) {
+		dir := t.TempDir()
+		require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL: remoteDir, Ref: "main", Dir: dir, Depth: 1,
+		})(t.Context()))
+		require.Equal(t, "c3", gitHeadSubject(t, dir))
+
+		// Advance main on the remote, then reuse the existing shallow clone.
+		require.NoError(t, gitCmd("-C", workDir, "commit", "--allow-empty", "-m", "c4"))
+		require.NoError(t, gitCmd("-C", workDir, "push", "origin", "main"))
+
+		require.NoError(t, NewGitCloneExecutor(NewGitCloneExecutorInput{
+			URL: remoteDir, Ref: "main", Dir: dir, Depth: 1,
+		})(t.Context()))
+		assert.Equal(t, "c4", gitHeadSubject(t, dir), "reused shallow clone should update to the new tip")
+		assert.FileExists(t, shallowMarker(dir), "repo should remain shallow after update")
+		assert.Equal(t, 1, gitRevCount(t, dir))
+	})
+}
+
+func gitRevParse(t *testing.T, dir, rev string) string {
+	t.Helper()
+	out, err := exec.Command("git", "-C", dir, "rev-parse", rev).Output()
+	require.NoError(t, err)
+	return strings.TrimSpace(string(out))
+}
+
+func gitRevCount(t *testing.T, dir string) int {
+	t.Helper()
+	out, err := exec.Command("git", "-C", dir, "rev-list", "--count", "HEAD").Output()
+	require.NoError(t, err)
+	n, err := strconv.Atoi(strings.TrimSpace(string(out)))
+	require.NoError(t, err)
+	return n
+}
+
+func gitHeadSubject(t *testing.T, dir string) string {
+	t.Helper()
+	out, err := exec.Command("git", "-C", dir, "log", "-1", "--format=%s").Output()
+	require.NoError(t, err)
+	return strings.TrimSpace(string(out))
+}
+
 func gitCmd(args ...string) error {
 	cmd := exec.Command("git", args...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
+	// Inject a deterministic identity and ignore the host's global/system config so commits
+	// succeed regardless of the host having no user.name/user.email (e.g. CI, GITHUB_ACTIONS
+	// unset) or a global commit.gpgsign, and without mutating the developer's ~/.gitconfig.
+	cmd.Env = append(os.Environ(),
+		"GIT_AUTHOR_NAME=Unit Test",
+		"GIT_AUTHOR_EMAIL=test@test.com",
+		"GIT_COMMITTER_NAME=Unit Test",
+		"GIT_COMMITTER_EMAIL=test@test.com",
+		"GIT_CONFIG_GLOBAL=/dev/null",
+		"GIT_CONFIG_SYSTEM=/dev/null",
+	)
 
 	err := cmd.Run()
 	if exitError, ok := err.(*exec.ExitError); ok {
@@ -354,12 +609,4 @@ func TestAcquireCloneLock(t *testing.T) {
 			t.Fatal("acquire on a different directory must not block")
 		}
 	})
-
-	t.Run("same directory reuses the same mutex", func(t *testing.T) {
-		dir := t.TempDir()
-
-		v1, _ := cloneLocks.LoadOrStore(dir, &sync.Mutex{})
-		v2, _ := cloneLocks.LoadOrStore(dir, &sync.Mutex{})
-		require.Same(t, v1, v2)
-	})
 }

act/common/job_error.go

@@ -24,7 +24,9 @@ func JobError(ctx context.Context) error {
 }
 
 func SetJobError(ctx context.Context, err error) {
-	ctx.Value(jobErrorContextKeyVal).(map[string]error)["error"] = err
+	if container, ok := ctx.Value(jobErrorContextKeyVal).(map[string]error); ok {
+		container["error"] = err
+	}
 }
 
 // WithJobErrorContainer adds a value to the context as a container for an error

act/common/line_writer.go

@@ -12,6 +12,13 @@ import (
 // LineHandler is a callback function for handling a line
 type LineHandler func(line string) bool
 
+// Flusher is implemented by writers that buffer a trailing, not-yet-terminated
+// line. Callers should flush once the underlying stream has reached EOF so the
+// final line (when it is not newline-terminated) is not lost.
+type Flusher interface {
+	Flush()
+}
+
 type lineWriter struct {
 	buffer   bytes.Buffer
 	handlers []LineHandler
@@ -24,6 +31,14 @@ func NewLineWriter(handlers ...LineHandler) io.Writer {
 	return w
 }
 
+// FlushWriter flushes w if it implements Flusher. It is a no-op otherwise, so
+// callers can flush an io.Writer without knowing its concrete type.
+func FlushWriter(w io.Writer) {
+	if f, ok := w.(Flusher); ok {
+		f.Flush()
+	}
+}
+
 func (lw *lineWriter) Write(p []byte) (n int, err error) {
 	pBuf := bytes.NewBuffer(p)
 	written := 0
@@ -44,6 +59,17 @@ func (lw *lineWriter) Write(p []byte) (n int, err error) {
 	return written, nil
 }
 
+// Flush emits any buffered, not-yet-newline-terminated content as a final line.
+// It is safe to call multiple times; subsequent calls with an empty buffer are
+// no-ops.
+func (lw *lineWriter) Flush() {
+	if lw.buffer.Len() == 0 {
+		return
+	}
+	lw.handleLine(lw.buffer.String())
+	lw.buffer.Reset()
+}
+
 func (lw *lineWriter) handleLine(line string) {
 	for _, h := range lw.handlers {
 		ok := h(line)

act/common/line_writer_test.go

@@ -5,6 +5,7 @@
 package common
 
 import (
+	"io"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -39,3 +40,33 @@ func TestLineWriter(t *testing.T) {
 	assert.Equal(" and another\n", lines[2])
 	assert.Equal("last line\n", lines[3])
 }
+
+func TestLineWriterFlush(t *testing.T) {
+	lines := make([]string, 0)
+	lineHandler := func(s string) bool {
+		lines = append(lines, s)
+		return true
+	}
+
+	lineWriter := NewLineWriter(lineHandler)
+
+	assert := assert.New(t)
+	_, err := lineWriter.Write([]byte("complete line\npartial line without newline"))
+	assert.NoError(err) //nolint:testifylint // pre-existing pattern from nektos/act
+
+	// Only the newline-terminated line is emitted before flushing.
+	assert.Equal([]string{"complete line\n"}, lines)
+
+	// Flushing emits the buffered, not-yet-terminated trailing line.
+	FlushWriter(lineWriter)
+	assert.Equal([]string{"complete line\n", "partial line without newline"}, lines)
+
+	// Flushing again is a no-op: nothing is buffered.
+	FlushWriter(lineWriter)
+	assert.Len(lines, 2)
+}
+
+func TestFlushWriterIgnoresNonFlusher(t *testing.T) {
+	// FlushWriter must be a safe no-op for writers that do not buffer lines.
+	assert.NotPanics(t, func() { FlushWriter(io.Discard) })
+}

act/common/outbound_ip.go

@@ -19,7 +19,9 @@ func GetOutboundIP() net.IP {
 	conn, err := net.Dial("udp", "8.8.8.8:80")
 	if err == nil {
 		defer conn.Close()
-		return conn.LocalAddr().(*net.UDPAddr).IP
+		if addr, ok := conn.LocalAddr().(*net.UDPAddr); ok {
+			return addr.IP
+		}
 	}
 
 	// So the machine cannot access the internet. Pick an IP address from network interfaces.

act/container/container_types.go

@@ -47,6 +47,7 @@ type NewContainerInput struct {
 	// Gitea specific
 	AutoRemove   bool
 	ValidVolumes []string
+	AllocatePTY  bool // allocate a pseudo-TTY for the container's exec processes
 }
 
 // FileEntry is a file to copy to a container
@@ -81,6 +82,14 @@ type NewDockerBuildExecutorInput struct {
 	BuildContext io.Reader
 	ImageTag     string
 	Platform     string
+	BuildArgs    map[string]*string
+}
+
+// NewDockerNetworkCreateExecutorInput the input for the NewDockerNetworkCreateExecutor function
+type NewDockerNetworkCreateExecutorInput struct {
+	EnableIPv4 *bool
+	EnableIPv6 *bool
+	RunnerUUID string
 }
 
 // NewDockerPullExecutorInput the input for the NewDockerPullExecutor function

act/container/docker_auth.go

@@ -8,34 +8,33 @@ package container
 
 import (
 	"context"
-	"strings"
 
 	"gitea.com/gitea/runner/act/common"
 
+	"github.com/distribution/reference"
 	"github.com/docker/cli/cli/config"
-	"github.com/docker/cli/cli/config/credentials"
-	"github.com/docker/docker/api/types/registry"
+	"github.com/moby/moby/api/types/registry"
 )
 
 func LoadDockerAuthConfig(ctx context.Context, image string) (registry.AuthConfig, error) {
 	logger := common.Logger(ctx)
-	config, err := config.Load(config.Dir())
+	// config.LoadDefaultConfigFile panics on nil io.Writer when the config
+	// file is malformed; use config.Load to route errors through the logger.
+	cfg, err := config.Load(config.Dir())
 	if err != nil {
 		logger.Warnf("Could not load docker config: %v", err)
 		return registry.AuthConfig{}, err
 	}
-
-	if !config.ContainsAuth() {
-		config.CredentialsStore = credentials.DetectDefaultStore(config.CredentialsStore)
+	registryKey := registryAuthConfigKey("docker.io")
+	if image != "" {
+		if registryRef, refErr := reference.ParseNormalizedNamed(image); refErr != nil {
+			logger.Warnf("Could not normalize image reference: %v", refErr)
+		} else {
+			registryKey = registryAuthConfigKey(reference.Domain(registryRef))
+		}
 	}
 
-	hostName := "index.docker.io"
-	index := strings.IndexRune(image, '/')
-	if index > -1 && (strings.ContainsAny(image[:index], ".:") || image[:index] == "localhost") {
-		hostName = image[:index]
-	}
-
-	authConfig, err := config.GetAuthConfig(hostName)
+	authConfig, err := cfg.GetAuthConfig(registryKey)
 	if err != nil {
 		logger.Warnf("Could not get auth config from docker config: %v", err)
 		return registry.AuthConfig{}, err
@@ -46,17 +45,16 @@ func LoadDockerAuthConfig(ctx context.Context, image string) (registry.AuthConfi
 
 func LoadDockerAuthConfigs(ctx context.Context) map[string]registry.AuthConfig {
 	logger := common.Logger(ctx)
-	config, err := config.Load(config.Dir())
+	cfg, err := config.Load(config.Dir())
 	if err != nil {
 		logger.Warnf("Could not load docker config: %v", err)
 		return nil
 	}
-
-	if !config.ContainsAuth() {
-		config.CredentialsStore = credentials.DetectDefaultStore(config.CredentialsStore)
+	creds, err := cfg.GetAllCredentials()
+	if err != nil {
+		logger.Warnf("Could not get docker auth configs: %v", err)
+		return nil
 	}
-
-	creds, _ := config.GetAllCredentials()
 	authConfigs := make(map[string]registry.AuthConfig, len(creds))
 	for k, v := range creds {
 		authConfigs[k] = registry.AuthConfig(v)
@@ -64,3 +62,10 @@ func LoadDockerAuthConfigs(ctx context.Context) map[string]registry.AuthConfig {
 
 	return authConfigs
 }
+
+func registryAuthConfigKey(domainName string) string {
+	if domainName == "docker.io" || domainName == "index.docker.io" {
+		return "https://index.docker.io/v1/"
+	}
+	return domainName
+}

act/container/docker_build.go

@@ -14,10 +14,12 @@ import (
 
 	"gitea.com/gitea/runner/act/common"
 
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/pkg/archive"
-	"github.com/moby/buildkit/frontend/dockerfile/dockerignore"
+	"github.com/moby/go-archive"
+	"github.com/moby/go-archive/compression"
+	"github.com/moby/moby/client"
 	"github.com/moby/patternmatcher"
+	"github.com/moby/patternmatcher/ignorefile"
+	specs "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // NewDockerBuildExecutor function to create a run executor for the container
@@ -42,12 +44,19 @@ func NewDockerBuildExecutor(input NewDockerBuildExecutorInput) common.Executor {
 		logger.Debugf("Building image from '%v'", input.ContextDir)
 
 		tags := []string{input.ImageTag}
-		options := types.ImageBuildOptions{
+		options := client.ImageBuildOptions{
 			Tags:        tags,
 			Remove:      true,
-			Platform:    input.Platform,
 			AuthConfigs: LoadDockerAuthConfigs(ctx),
 			Dockerfile:  input.Dockerfile,
+			BuildArgs:   input.BuildArgs,
+		}
+		platform, err := parsePlatform(input.Platform)
+		if err != nil {
+			return err
+		}
+		if platform != nil {
+			options.Platforms = []specs.Platform{*platform}
 		}
 		var buildContext io.ReadCloser
 		if input.BuildContext != nil {
@@ -76,7 +85,7 @@ func createBuildContext(ctx context.Context, contextDir, relDockerfile string) (
 	common.Logger(ctx).Debugf("Creating archive for build context dir '%s' with relative dockerfile '%s'", contextDir, relDockerfile)
 
 	// And canonicalize dockerfile name to a platform-independent one
-	relDockerfile = archive.CanonicalTarNameForPath(relDockerfile)
+	relDockerfile = filepath.ToSlash(relDockerfile)
 
 	f, err := os.Open(filepath.Join(contextDir, ".dockerignore"))
 	if err != nil && !os.IsNotExist(err) {
@@ -86,7 +95,7 @@ func createBuildContext(ctx context.Context, contextDir, relDockerfile string) (
 
 	var excludes []string
 	if err == nil {
-		excludes, err = dockerignore.ReadAll(f) //nolint:staticcheck // pre-existing issue from nektos/act
+		excludes, err = ignorefile.ReadAll(f)
 		if err != nil {
 			return nil, err
 		}
@@ -106,9 +115,8 @@ func createBuildContext(ctx context.Context, contextDir, relDockerfile string) (
 		includes = append(includes, ".dockerignore", relDockerfile)
 	}
 
-	compression := archive.Uncompressed
 	buildCtx, err := archive.TarWithOptions(contextDir, &archive.TarOptions{
-		Compression:     compression,
+		Compression:     compression.None,
 		ExcludePatterns: excludes,
 		IncludeFiles:    includes,
 	})

act/container/docker_create_flags.go

@@ -0,0 +1,86 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !(WITHOUT_DOCKER || !(linux || darwin || windows || netbsd))
+
+package container
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"slices"
+
+	"github.com/kballard/go-shellquote"
+	"github.com/spf13/pflag"
+)
+
+const (
+	pullPolicyAlways  = "always"
+	pullPolicyMissing = "missing"
+	pullPolicyNever   = "never"
+)
+
+var pullPolicies = []string{pullPolicyAlways, pullPolicyMissing, pullPolicyNever}
+
+// createFlags are the flags docker/cli registers on the `create` and `run` commands
+// instead of in addFlags, so they are not part of containerOptions.
+type createFlags struct {
+	platform     string
+	pull         string
+	name         string
+	useAPISocket bool
+}
+
+func registerCreateFlags(flags *pflag.FlagSet) *createFlags {
+	cf := new(createFlags)
+	flags.StringVar(&cf.platform, "platform", "", "Set platform if server is multi-platform capable")
+	flags.StringVar(&cf.pull, "pull", pullPolicyMissing, `Pull image before creating ("always", "missing", "never")`)
+	flags.StringVar(&cf.name, "name", "", "Assign a name to the container")
+	flags.BoolVar(&cf.useAPISocket, "use-api-socket", false, "Bind mount Docker API socket and required auth")
+	// Accepted without effect: pull progress is only logged at debug level, and docker
+	// no longer implements content trust.
+	flags.BoolP("quiet", "q", false, "Suppress the pull output")
+	flags.Bool("disable-content-trust", true, "Skip image verification (deprecated)")
+	return cf
+}
+
+// parseContainerOptions parses a container options string. The flags are returned even
+// on error, holding whatever was read before the failure.
+func parseContainerOptions(options string) (*pflag.FlagSet, *containerOptions, *createFlags, error) {
+	flags := pflag.NewFlagSet("container_flags", pflag.ContinueOnError)
+	flags.SetOutput(io.Discard)
+	copts := addFlags(flags)
+	cf := registerCreateFlags(flags)
+
+	args, err := shellquote.Split(options)
+	if err != nil {
+		return flags, copts, cf, fmt.Errorf("Cannot split container options: '%s': '%w'", options, err)
+	}
+
+	if err := flags.Parse(args); err != nil {
+		return flags, copts, cf, fmt.Errorf("Cannot parse container options: '%s': '%w'", options, err)
+	}
+
+	return flags, copts, cf, nil
+}
+
+// createFlagsFromOptions reads the create-level flags that have to be known before the
+// container is created. Malformed options keep the defaults here and are reported by
+// mergeContainerConfigs at create time.
+func createFlagsFromOptions(options string) *createFlags {
+	_, _, cf, _ := parseContainerOptions(options)
+	return cf
+}
+
+func (cf *createFlags) validate() error {
+	if !slices.Contains(pullPolicies, cf.pull) {
+		return fmt.Errorf("invalid --pull option %q: must be one of %q", cf.pull, pullPolicies)
+	}
+
+	if cf.useAPISocket {
+		return errors.New("--use-api-socket is not supported, use the runner's container.docker_host setting to expose a docker socket")
+	}
+
+	return nil
+}

act/container/docker_create_flags_test.go

@@ -0,0 +1,62 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCreateFlagsFromOptions(t *testing.T) {
+	for _, tc := range []struct {
+		options  string
+		platform string
+		pull     string
+	}{
+		{"", "", pullPolicyMissing},
+		{"-v /a:/b --platform=linux/arm64 --pull always", "linux/arm64", pullPolicyAlways},
+		{"--platform linux/arm/v7 --pull never", "linux/arm/v7", pullPolicyNever},
+		{`--platform "linux/amd64`, "", pullPolicyMissing}, // malformed, defaults kept
+	} {
+		t.Run(tc.options, func(t *testing.T) {
+			cf := createFlagsFromOptions(tc.options)
+			assert.Equal(t, tc.platform, cf.platform)
+			assert.Equal(t, tc.pull, cf.pull)
+		})
+	}
+}
+
+func TestCreateFlagsValidate(t *testing.T) {
+	for _, tc := range []struct {
+		options string
+		wantErr string
+	}{
+		{"--quiet --disable-content-trust --name mine", ""},
+		{"--pull sometimes", `invalid --pull option "sometimes"`},
+		{"--use-api-socket", "--use-api-socket is not supported"},
+	} {
+		t.Run(tc.options, func(t *testing.T) {
+			err := createFlagsFromOptions(tc.options).validate()
+			if tc.wantErr == "" {
+				require.NoError(t, err)
+				return
+			}
+			require.ErrorContains(t, err, tc.wantErr)
+		})
+	}
+}
+
+func TestNewContainerAppliesCreateFlags(t *testing.T) {
+	input := &NewContainerInput{Platform: "linux/amd64", Options: "--platform linux/arm64 --pull never"}
+	cr, ok := NewContainer(input).(*containerReference)
+	require.True(t, ok)
+	assert.Equal(t, "linux/arm64", input.Platform)
+	assert.Equal(t, pullPolicyNever, cr.pullPolicy)
+
+	kept := &NewContainerInput{Platform: "linux/amd64", Options: "--privileged"}
+	NewContainer(kept)
+	assert.Equal(t, "linux/amd64", kept.Platform)
+}

act/container/docker_images.go

@@ -10,8 +10,8 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/client"
+	cerrdefs "github.com/containerd/errdefs"
+	"github.com/moby/moby/client"
 )
 
 // ImageExistsLocally returns a boolean indicating if an image with the
@@ -23,8 +23,8 @@ func ImageExistsLocally(ctx context.Context, imageName, platform string) (bool,
 	}
 	defer cli.Close()
 
-	inspectImage, _, err := cli.ImageInspectWithRaw(ctx, imageName)
-	if client.IsErrNotFound(err) {
+	inspectImage, err := cli.ImageInspect(ctx, imageName)
+	if cerrdefs.IsNotFound(err) {
 		return false, nil
 	} else if err != nil {
 		return false, err
@@ -46,14 +46,14 @@ func RemoveImage(ctx context.Context, imageName string, force, pruneChildren boo
 	}
 	defer cli.Close()
 
-	inspectImage, _, err := cli.ImageInspectWithRaw(ctx, imageName)
-	if client.IsErrNotFound(err) {
+	inspectImage, err := cli.ImageInspect(ctx, imageName)
+	if cerrdefs.IsNotFound(err) {
 		return false, nil
 	} else if err != nil {
 		return false, err
 	}
 
-	if _, err = cli.ImageRemove(ctx, inspectImage.ID, types.ImageRemoveOptions{
+	if _, err = cli.ImageRemove(ctx, inspectImage.ID, client.ImageRemoveOptions{
 		Force:         force,
 		PruneChildren: pruneChildren,
 	}); err != nil {

act/container/docker_images_test.go

@@ -6,66 +6,64 @@ package container
 
 import (
 	"context"
-	"io"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
 	"testing"
 
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/client"
 	log "github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func init() {
 	log.SetLevel(log.DebugLevel)
 }
 
-func TestImageExistsLocally(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
-	}
-	ctx := context.Background()
-	// to help make this test reliable and not flaky, we need to have
-	// an image that will exist, and onew that won't exist
-
-	// Test if image exists with specific tag
-	invalidImageTag, err := ImageExistsLocally(ctx, "library/alpine:this-random-tag-will-never-exist", "linux/amd64")
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.False(t, invalidImageTag)
-
-	// Test if image exists with specific architecture (image platform)
-	invalidImagePlatform, err := ImageExistsLocally(ctx, "alpine:latest", "windows/amd64")
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.False(t, invalidImagePlatform)
-
-	// pull an image
-	cli, err := client.NewClientWithOpts(client.FromEnv)
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	cli.NegotiateAPIVersion(context.Background())
-
-	// Chose alpine latest because it's so small
-	// maybe we should build an image instead so that tests aren't reliable on dockerhub
-	readerDefault, err := cli.ImagePull(ctx, "node:24-bookworm-slim", types.ImagePullOptions{
-		Platform: "linux/amd64",
-	})
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	defer readerDefault.Close()
-	_, err = io.ReadAll(readerDefault)
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-	imageDefaultArchExists, err := ImageExistsLocally(ctx, "node:24-bookworm-slim", "linux/amd64")
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.True(t, imageDefaultArchExists)
-
-	// Validate if another architecture platform can be pulled
-	readerArm64, err := cli.ImagePull(ctx, "node:24-bookworm-slim", types.ImagePullOptions{
-		Platform: "linux/arm64",
-	})
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	defer readerArm64.Close()
-	_, err = io.ReadAll(readerArm64)
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-
-	imageArm64Exists, err := ImageExistsLocally(ctx, "node:24-bookworm-slim", "linux/arm64")
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.True(t, imageArm64Exists)
+// buildScratchImage builds a tiny empty image for the given platform locally (FROM scratch, no
+// network or emulation since there is nothing to run) and returns its tag, removing it after
+// the test.
+func buildScratchImage(t *testing.T, platform string) string {
+	t.Helper()
+	tag := fmt.Sprintf("act-test-exists-%s:latest", strings.TrimPrefix(platform, "linux/"))
+	cmd := exec.Command("docker", "build", "--platform", platform, "-t", tag, "-")
+	cmd.Stdin = strings.NewReader("FROM scratch\nLABEL act-test=1\n")
+	// Force BuildKit: it records the requested architecture in the image config for a
+	// FROM-scratch build, whereas the classic builder ignores --platform and tags it with the
+	// host arch, which would break the per-platform existence assertions below.
+	cmd.Env = append(os.Environ(), "DOCKER_BUILDKIT=1")
+	out, err := cmd.CombinedOutput()
+	require.NoError(t, err, string(out))
+	t.Cleanup(func() { _ = exec.Command("docker", "rmi", "-f", tag).Run() })
+	return tag
+}
+
+func TestImageExistsLocally(t *testing.T) {
+	requireDocker(t)
+	ctx := context.Background()
+
+	// a non-existent image is reported absent
+	missing, err := ImageExistsLocally(ctx, "library/alpine:this-random-tag-will-never-exist", "linux/amd64")
+	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.False(t, missing)
+
+	// Build tiny images for two architectures locally so per-platform existence can be checked
+	// offline (formerly pulled node:24-bookworm-slim for amd64 and arm64 over the network).
+	amd64Ref := buildScratchImage(t, "linux/amd64")
+	arm64Ref := buildScratchImage(t, "linux/arm64")
+
+	amd64Exists, err := ImageExistsLocally(ctx, amd64Ref, "linux/amd64")
+	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.True(t, amd64Exists)
+
+	// a non-host architecture image is detected for its own architecture
+	arm64Exists, err := ImageExistsLocally(ctx, arm64Ref, "linux/arm64")
+	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.True(t, arm64Exists)
+
+	// a present image is reported absent for a different platform
+	wrongPlatform, err := ImageExistsLocally(ctx, amd64Ref, "linux/arm64")
+	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.False(t, wrongPlatform)
 }

act/container/docker_logger.go

@@ -57,7 +57,7 @@ func logDockerResponse(logger logrus.FieldLogger, dockerResponse io.ReadCloser,
 
 		if msg.ErrorDetail.Message != "" {
 			writeLog(logger, isError, "%s", msg.ErrorDetail.Message)
-			return errors.New(msg.Error)
+			return errors.New(msg.ErrorDetail.Message)
 		}
 
 		if msg.Status != "" {

act/container/docker_network.go

@@ -8,13 +8,70 @@ package container
 
 import (
 	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
 
 	"gitea.com/gitea/runner/act/common"
 
-	"github.com/docker/docker/api/types"
+	"github.com/moby/moby/client"
 )
 
-func NewDockerNetworkCreateExecutor(name string) common.Executor {
+const (
+	networkCreateAttempts   = 3
+	networkCreateRetryDelay = time.Second
+
+	// marks the networks a runner creates for its jobs, so it can tell its own leftovers from
+	// those of another runner sharing the daemon
+	runnerUUIDLabel = "com.gitea.runner.uuid"
+)
+
+// RemoveOrphanNetworks removes the networks this runner created for jobs whose teardown did
+// not get to them: the runner died with the job, the teardown timed out, or the network still
+// had an endpoint on it at the time. Each one holds a subnet of the daemon's address pool
+// until it is removed. Networks created after createdBefore are left alone, so a job starting
+// while this runs cannot lose the network it has created but not yet attached a container to.
+func RemoveOrphanNetworks(ctx context.Context, runnerUUID string, createdBefore time.Time) error {
+	cli, err := GetDockerClient(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to connect to the docker daemon: %w", err)
+	}
+	defer cli.Close()
+
+	return removeOrphanNetworks(ctx, cli, runnerUUID, createdBefore)
+}
+
+func removeOrphanNetworks(ctx context.Context, cli client.APIClient, runnerUUID string, createdBefore time.Time) error {
+	networks, err := cli.NetworkList(ctx, client.NetworkListOptions{
+		Filters: make(client.Filters).Add("label", runnerUUIDLabel+"="+runnerUUID),
+	})
+	if err != nil {
+		return err
+	}
+
+	var errs []error
+	for _, n := range networks.Items {
+		result, err := cli.NetworkInspect(ctx, n.ID, client.NetworkInspectOptions{})
+		if err != nil {
+			errs = append(errs, fmt.Errorf("failed to inspect network %s: %w", n.Name, err))
+			continue
+		}
+		// the emptiness check, not the label, is what keeps a live job of another process
+		// sharing this registration safe
+		if len(result.Network.Containers) != 0 || result.Network.Created.After(createdBefore) {
+			continue
+		}
+		if _, err := cli.NetworkRemove(ctx, n.ID, client.NetworkRemoveOptions{}); err != nil {
+			errs = append(errs, fmt.Errorf("failed to remove network %s: %w", n.Name, err))
+			continue
+		}
+		common.Logger(ctx).Infof("removed docker network %s left behind by an earlier job", n.Name)
+	}
+	return errors.Join(errs...)
+}
+
+func NewDockerNetworkCreateExecutor(name string, opts NewDockerNetworkCreateExecutorInput) common.Executor {
 	return func(ctx context.Context) error {
 		cli, err := GetDockerClient(ctx)
 		if err != nil {
@@ -23,29 +80,58 @@ func NewDockerNetworkCreateExecutor(name string) common.Executor {
 		defer cli.Close()
 
 		// Only create the network if it doesn't exist
-		networks, err := cli.NetworkList(ctx, types.NetworkListOptions{})
+		networks, err := cli.NetworkList(ctx, client.NetworkListOptions{})
 		if err != nil {
 			return err
 		}
 		// For Gitea, reduce log noise
 		// common.Logger(ctx).Debugf("%v", networks)
-		for _, network := range networks {
-			if network.Name == name {
+		for _, n := range networks.Items {
+			if n.Name == name {
 				common.Logger(ctx).Debugf("Network %v exists", name)
 				return nil
 			}
 		}
 
-		_, err = cli.NetworkCreate(ctx, name, types.NetworkCreate{
-			Driver: "bridge",
-			Scope:  "local",
-		})
-		if err != nil {
-			return err
+		for i := range networkCreateAttempts {
+			if i > 0 {
+				common.Logger(ctx).Infof("Waiting for a free docker address pool to create network %s", name)
+				select {
+				case <-ctx.Done():
+					return ctx.Err()
+				case <-time.After(time.Duration(i) * networkCreateRetryDelay):
+				}
+			}
+			if _, err = cli.NetworkCreate(ctx, name, client.NetworkCreateOptions{
+				Driver:     "bridge",
+				Scope:      "local",
+				EnableIPv4: opts.EnableIPv4,
+				EnableIPv6: opts.EnableIPv6,
+				Labels:     runnerLabels(opts.RunnerUUID),
+			}); err == nil {
+				return nil
+			}
+			if !isAddressPoolExhausted(err) {
+				return err
+			}
 		}
+		return fmt.Errorf("docker has no address pool left for this job's network, lower runner.capacity or widen default-address-pools in the docker daemon config: %w", err)
+	}
+}
 
+func runnerLabels(runnerUUID string) map[string]string {
+	if runnerUUID == "" {
 		return nil
 	}
+	return map[string]string{runnerUUIDLabel: runnerUUID}
+}
+
+// The daemon reports this as a plain invalid-parameter error, the same kind it uses for every
+// malformed request, so the message is the only discriminator.
+func isAddressPoolExhausted(err error) bool {
+	msg := err.Error()
+	return strings.Contains(msg, "all predefined address pools have been fully subnetted") ||
+		strings.Contains(msg, "could not find an available, non-overlapping IPv4 address pool among the defaults") // docker 24 and older
 }
 
 func NewDockerNetworkRemoveExecutor(name string) common.Executor {
@@ -56,31 +142,33 @@ func NewDockerNetworkRemoveExecutor(name string) common.Executor {
 		}
 		defer cli.Close()
 
-		// Make shure that all network of the specified name are removed
+		// Make sure that all network of the specified name are removed
 		// cli.NetworkRemove refuses to remove a network if there are duplicates
-		networks, err := cli.NetworkList(ctx, types.NetworkListOptions{})
+		networks, err := cli.NetworkList(ctx, client.NetworkListOptions{})
 		if err != nil {
 			return err
 		}
 		// For Gitea, reduce log noise
 		// common.Logger(ctx).Debugf("%v", networks)
-		for _, network := range networks {
-			if network.Name == name {
-				result, err := cli.NetworkInspect(ctx, network.ID, types.NetworkInspectOptions{})
+		var errs []error
+		for _, n := range networks.Items {
+			if n.Name == name {
+				result, err := cli.NetworkInspect(ctx, n.ID, client.NetworkInspectOptions{})
 				if err != nil {
 					return err
 				}
 
-				if len(result.Containers) == 0 {
-					if err = cli.NetworkRemove(ctx, network.ID); err != nil {
-						common.Logger(ctx).Debugf("%v", err)
-					}
-				} else {
-					common.Logger(ctx).Debugf("Refusing to remove network %v because it still has active endpoints", name)
+				// it holds a subnet out of the daemon's pool until something reclaims it
+				if len(result.Network.Containers) != 0 {
+					common.Logger(ctx).Warnf("Refusing to remove network %s because it still has active endpoints, the idle cleanup reclaims it once they are gone", name)
+					continue
+				}
+				if _, err = cli.NetworkRemove(ctx, n.ID, client.NetworkRemoveOptions{}); err != nil {
+					errs = append(errs, fmt.Errorf("failed to remove network %s: %w", name, err))
 				}
 			}
 		}
 
-		return err
+		return errors.Join(errs...)
 	}
 }

act/container/docker_network_test.go

@@ -0,0 +1,50 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	cerrdefs "github.com/containerd/errdefs"
+	"github.com/moby/moby/api/types/network"
+	mobyclient "github.com/moby/moby/client"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsAddressPoolExhausted(t *testing.T) {
+	assert.True(t, isAddressPoolExhausted(cerrdefs.ErrInvalidArgument.WithMessage("Error response from daemon: all predefined address pools have been fully subnetted")))
+	assert.True(t, isAddressPoolExhausted(errors.New("could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network")))
+	assert.False(t, isAddressPoolExhausted(cerrdefs.ErrInvalidArgument.WithMessage("invalid subnet 10.0.0.0/8: it overlaps with an existing network")))
+}
+
+// Of this runner's networks, only the ones nothing is attached to and old enough to predate
+// any job now starting are the runner's to reclaim. An unexpected NetworkRemove fails the
+// test on its own, since testify has no expectation to match it against.
+func TestRemoveOrphanNetworks(t *testing.T) {
+	ctx := context.Background()
+	cutoff := time.Date(2026, time.April, 29, 20, 0, 0, 0, time.UTC)
+	client := &mockDockerClient{}
+	client.On("NetworkList", ctx, mobyclient.NetworkListOptions{
+		Filters: make(mobyclient.Filters).Add("label", runnerUUIDLabel+"=runner-1"),
+	}).Return(mobyclient.NetworkListResult{Items: []network.Summary{
+		{Network: network.Network{ID: "orphan"}},
+		{Network: network.Network{ID: "busy"}},
+		{Network: network.Network{ID: "starting"}},
+	}}, nil)
+	client.On("NetworkInspect", ctx, "orphan", mobyclient.NetworkInspectOptions{}).
+		Return(mobyclient.NetworkInspectResult{}, nil)
+	client.On("NetworkInspect", ctx, "busy", mobyclient.NetworkInspectOptions{}).
+		Return(mobyclient.NetworkInspectResult{Network: network.Inspect{Containers: map[string]network.EndpointResource{"c": {}}}}, nil)
+	client.On("NetworkInspect", ctx, "starting", mobyclient.NetworkInspectOptions{}).
+		Return(mobyclient.NetworkInspectResult{Network: network.Inspect{Network: network.Network{Created: cutoff.Add(time.Second)}}}, nil)
+	client.On("NetworkRemove", ctx, "orphan", mobyclient.NetworkRemoveOptions{}).
+		Return(mobyclient.NetworkRemoveResult{}, nil)
+
+	require.NoError(t, removeOrphanNetworks(ctx, client, "runner-1", cutoff))
+	client.AssertExpectations(t)
+}

act/container/docker_platform.go

@@ -0,0 +1,39 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// Copyright 2025 The nektos/act Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !(WITHOUT_DOCKER || !(linux || darwin || windows || netbsd))
+
+package container
+
+import (
+	"fmt"
+	"strings"
+
+	specs "github.com/opencontainers/image-spec/specs-go/v1"
+)
+
+// parsePlatform parses an "os/arch[/variant]" string into a Platform. An empty input
+// returns (nil, nil), meaning "no platform constraint". A non-empty but malformed
+// string is rejected explicitly so it cannot silently fall through to the daemon's
+// default architecture.
+func parsePlatform(platform string) (*specs.Platform, error) {
+	if platform == "" {
+		return nil, nil //nolint:nilnil // no platform constraint requested
+	}
+
+	parts := strings.Split(platform, "/")
+	if len(parts) < 2 || len(parts) > 3 || parts[0] == "" || parts[1] == "" || (len(parts) == 3 && parts[2] == "") {
+		return nil, fmt.Errorf("invalid platform %q: expected os/arch[/variant]", platform)
+	}
+
+	spec := &specs.Platform{
+		OS:           strings.ToLower(parts[0]),
+		Architecture: strings.ToLower(parts[1]),
+	}
+	if len(parts) == 3 {
+		spec.Variant = strings.ToLower(parts[2])
+	}
+
+	return spec, nil
+}

act/container/docker_platform_test.go

@@ -0,0 +1,63 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParsePlatform(t *testing.T) {
+	t.Run("empty input returns nil platform without error", func(t *testing.T) {
+		got, err := parsePlatform("")
+		require.NoError(t, err)
+		assert.Nil(t, got)
+	})
+
+	t.Run("os/arch", func(t *testing.T) {
+		got, err := parsePlatform("linux/amd64")
+		require.NoError(t, err)
+		require.NotNil(t, got)
+		assert.Equal(t, "linux", got.OS)
+		assert.Equal(t, "amd64", got.Architecture)
+		assert.Empty(t, got.Variant)
+	})
+
+	t.Run("os/arch/variant", func(t *testing.T) {
+		got, err := parsePlatform("linux/arm/v7")
+		require.NoError(t, err)
+		require.NotNil(t, got)
+		assert.Equal(t, "linux", got.OS)
+		assert.Equal(t, "arm", got.Architecture)
+		assert.Equal(t, "v7", got.Variant)
+	})
+
+	t.Run("input is lowercased", func(t *testing.T) {
+		got, err := parsePlatform("Linux/AMD64/V8")
+		require.NoError(t, err)
+		require.NotNil(t, got)
+		assert.Equal(t, "linux", got.OS)
+		assert.Equal(t, "amd64", got.Architecture)
+		assert.Equal(t, "v8", got.Variant)
+	})
+
+	for _, bad := range []string{
+		"amd64",
+		"linux",
+		"linux/",
+		"/amd64",
+		"/",
+		"//",
+		"linux/arm/",
+		"linux/arm/v7/extra",
+	} {
+		t.Run("rejects "+bad, func(t *testing.T) {
+			got, err := parsePlatform(bad)
+			require.Error(t, err)
+			assert.Nil(t, got)
+		})
+	}
+}

act/container/docker_pull.go

@@ -8,16 +8,16 @@ package container
 
 import (
 	"context"
-	"encoding/base64"
-	"encoding/json"
 	"fmt"
 	"strings"
 
 	"gitea.com/gitea/runner/act/common"
 
 	"github.com/distribution/reference"
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/registry"
+	"github.com/moby/moby/api/pkg/authconfig"
+	"github.com/moby/moby/api/types/registry"
+	"github.com/moby/moby/client"
+	specs "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // NewDockerPullExecutor function to create a run executor for the container
@@ -30,23 +30,19 @@ func NewDockerPullExecutor(input NewDockerPullExecutorInput) common.Executor {
 			return nil
 		}
 
-		pull := input.ForcePull
-		if !pull {
+		// skip the pull when the image is already here: either none was forced, or a digest
+		// pins the content so a forced pull could only fetch the same bytes again
+		if !input.ForcePull || isPinnedImage(input.Image) {
 			imageExists, err := ImageExistsLocally(ctx, input.Image, input.Platform)
 			logger.Debugf("Image exists? %v", imageExists)
 			if err != nil {
 				return fmt.Errorf("unable to determine if image already exists for image '%s' (%s): %w", input.Image, input.Platform, err)
 			}
-
-			if !imageExists {
-				pull = true
+			if imageExists {
+				return nil
 			}
 		}
 
-		if !pull {
-			return nil
-		}
-
 		imageRef := cleanImage(ctx, input.Image)
 		logger.Debugf("pulling image '%v' (%s)", imageRef, input.Platform)
 
@@ -61,43 +57,58 @@ func NewDockerPullExecutor(input NewDockerPullExecutorInput) common.Executor {
 			return err
 		}
 
-		reader, err := cli.ImagePull(ctx, imageRef, imagePullOptions)
-
-		_ = logDockerResponse(logger, reader, err != nil)
-		if err != nil {
-			if imagePullOptions.RegistryAuth != "" && strings.Contains(err.Error(), "unauthorized") {
-				logger.Errorf("pulling image '%v' (%s) failed with credentials %s retrying without them, please check for stale docker config files", imageRef, input.Platform, err.Error())
-				imagePullOptions.RegistryAuth = ""
-				reader, err = cli.ImagePull(ctx, imageRef, imagePullOptions)
-
-				_ = logDockerResponse(logger, reader, err != nil)
+		// the daemon reports a failure that happens after the first progress line in the
+		// stream rather than on the call itself, so both have to be checked
+		pullOnce := func(opts client.ImagePullOptions) error {
+			reader, err := cli.ImagePull(ctx, imageRef, opts)
+			streamErr := logDockerResponse(logger, reader, err != nil)
+			if err != nil {
+				return err
 			}
-			return err
+			return streamErr
 		}
-		return nil
+
+		err = pullOnce(imagePullOptions)
+		if err != nil && imagePullOptions.RegistryAuth != "" && strings.Contains(err.Error(), "unauthorized") {
+			logger.Errorf("pulling image '%v' (%s) failed with credentials %s retrying without them, please check for stale docker config files", imageRef, input.Platform, err.Error())
+			imagePullOptions.RegistryAuth = ""
+			err = pullOnce(imagePullOptions)
+		}
+		if err == nil {
+			return nil
+		}
+		// a registry that is down should not fail a job whose image is already here
+		if exists, existsErr := ImageExistsLocally(ctx, input.Image, input.Platform); existsErr == nil && exists {
+			logger.Warnf("could not update image '%s' (%s), continuing with the local copy: %v", imageRef, input.Platform, err)
+			return nil
+		}
+		return fmt.Errorf("failed to pull image '%s' (%s): %w", imageRef, input.Platform, err)
 	}
 }
 
-func getImagePullOptions(ctx context.Context, input NewDockerPullExecutorInput) (types.ImagePullOptions, error) {
-	imagePullOptions := types.ImagePullOptions{
-		Platform: input.Platform,
+func getImagePullOptions(ctx context.Context, input NewDockerPullExecutorInput) (client.ImagePullOptions, error) {
+	imagePullOptions := client.ImagePullOptions{}
+	platform, err := parsePlatform(input.Platform)
+	if err != nil {
+		return imagePullOptions, err
+	}
+	if platform != nil {
+		imagePullOptions.Platforms = []specs.Platform{*platform}
 	}
 	logger := common.Logger(ctx)
 
 	if input.Username != "" && input.Password != "" {
 		logger.Debugf("using authentication for docker pull")
 
-		authConfig := registry.AuthConfig{
+		encodedAuth, err := authconfig.Encode(registry.AuthConfig{
 			Username: input.Username,
 			Password: input.Password,
-		}
-
-		encodedJSON, err := json.Marshal(authConfig)
+		})
 		if err != nil {
 			return imagePullOptions, err
 		}
 
-		imagePullOptions.RegistryAuth = base64.URLEncoding.EncodeToString(encodedJSON)
+		imagePullOptions.RegistryAuth = encodedAuth
 	} else {
 		authConfig, err := LoadDockerAuthConfig(ctx, input.Image)
 		if err != nil {
@@ -108,19 +119,26 @@ func getImagePullOptions(ctx context.Context, input NewDockerPullExecutorInput)
 		}
 		logger.Info("using DockerAuthConfig authentication for docker pull")
 
-		encodedJSON, err := json.Marshal(authConfig)
+		imagePullOptions.RegistryAuth, err = authconfig.Encode(authConfig)
 		if err != nil {
 			return imagePullOptions, err
 		}
-
-		imagePullOptions.RegistryAuth = base64.URLEncoding.EncodeToString(encodedJSON)
 	}
 
 	return imagePullOptions, nil
 }
 
-func cleanImage(ctx context.Context, image string) string {
+func isPinnedImage(image string) bool {
 	ref, err := reference.ParseAnyReference(image)
+	if err != nil {
+		return false
+	}
+	_, pinned := ref.(reference.Canonical)
+	return pinned
+}
+
+func cleanImage(ctx context.Context, imageName string) string {
+	ref, err := reference.ParseAnyReference(imageName)
 	if err != nil {
 		common.Logger(ctx).Error(err)
 		return ""

act/container/docker_pull_test.go

@@ -6,11 +6,15 @@ package container
 
 import (
 	"context"
+	"io"
+	"strings"
 	"testing"
 
 	"github.com/docker/cli/cli/config"
 	log "github.com/sirupsen/logrus"
+	"github.com/sirupsen/logrus/hooks/test"
 	assert "github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func init() {
@@ -40,6 +44,9 @@ func TestCleanImage(t *testing.T) {
 func TestGetImagePullOptions(t *testing.T) {
 	ctx := context.Background()
 
+	orig := config.Dir()
+	t.Cleanup(func() { config.SetDir(orig) })
+
 	config.SetDir("/non-existent/docker")
 
 	options, err := getImagePullOptions(ctx, NewDockerPullExecutorInput{})
@@ -62,3 +69,21 @@ func TestGetImagePullOptions(t *testing.T) {
 	assert.NoError(t, err, "Failed to create ImagePullOptions") //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, "eyJ1c2VybmFtZSI6InVzZXJuYW1lIiwicGFzc3dvcmQiOiJwYXNzd29yZFxuIiwic2VydmVyYWRkcmVzcyI6Imh0dHBzOi8vaW5kZXguZG9ja2VyLmlvL3YxLyJ9", options.RegistryAuth, "RegistryAuth should be taken from local docker config")
 }
+
+// A digest-pinned image is immutable, so its local copy is always current.
+func TestIsPinnedImage(t *testing.T) {
+	assert.True(t, isPinnedImage("alpine@sha256:28bd5fe8b56d1bd048e5babf5b10710ebe0bae67db86916198a6eec434943f8b"))
+	assert.False(t, isPinnedImage("alpine:latest"))
+}
+
+// The pull path reports a failure the daemon sent mid-stream, so it must carry the reason
+// whichever of the two shapes the daemon used.
+func TestLogDockerResponseError(t *testing.T) {
+	logger, _ := test.NewNullLogger()
+	streamErr := func(line string) error {
+		return logDockerResponse(logger, io.NopCloser(strings.NewReader(line)), false)
+	}
+	require.EqualError(t, streamErr(`{"error":"toomanyrequests: rate limit exceeded"}`), "toomanyrequests: rate limit exceeded")
+	require.EqualError(t, streamErr(`{"errorDetail":{"message":"unexpected EOF"}}`), "unexpected EOF")
+	require.NoError(t, streamErr(`{"status":"Downloading"}`))
+}

act/container/docker_run_test.go

@@ -5,21 +5,27 @@
 package container
 
 import (
+	"archive/tar"
 	"bufio"
 	"bytes"
 	"context"
+	"encoding/binary"
 	"errors"
 	"io"
 	"net"
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
 
 	"gitea.com/gitea/runner/act/common"
 
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/container"
-	"github.com/docker/docker/client"
+	cerrdefs "github.com/containerd/errdefs"
+	"github.com/moby/moby/api/pkg/stdcopy"
+	"github.com/moby/moby/api/types/container"
+	"github.com/moby/moby/api/types/mount"
+	mobyclient "github.com/moby/moby/client"
 	"github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
@@ -27,9 +33,10 @@ import (
 )
 
 func TestDocker(t *testing.T) {
+	requireDocker(t)
 	ctx := context.Background()
 	client, err := GetDockerClient(ctx)
-	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+	require.NoError(t, err)
 	defer client.Close()
 
 	dockerBuild := NewDockerBuildExecutor(NewDockerBuildExecutorInput{
@@ -67,33 +74,78 @@ func TestDocker(t *testing.T) {
 }
 
 type mockDockerClient struct {
-	client.APIClient
+	mobyclient.APIClient
 	mock.Mock
 }
 
-func (m *mockDockerClient) ContainerExecCreate(ctx context.Context, id string, opts types.ExecConfig) (types.IDResponse, error) {
+func (m *mockDockerClient) ExecCreate(ctx context.Context, id string, opts mobyclient.ExecCreateOptions) (mobyclient.ExecCreateResult, error) {
 	args := m.Called(ctx, id, opts)
-	return args.Get(0).(types.IDResponse), args.Error(1)
+	return args.Get(0).(mobyclient.ExecCreateResult), args.Error(1)
 }
 
-func (m *mockDockerClient) ContainerExecAttach(ctx context.Context, id string, opts types.ExecStartCheck) (types.HijackedResponse, error) {
+func (m *mockDockerClient) ExecAttach(ctx context.Context, id string, opts mobyclient.ExecAttachOptions) (mobyclient.ExecAttachResult, error) {
 	args := m.Called(ctx, id, opts)
-	return args.Get(0).(types.HijackedResponse), args.Error(1)
+	return args.Get(0).(mobyclient.ExecAttachResult), args.Error(1)
 }
 
-func (m *mockDockerClient) ContainerExecInspect(ctx context.Context, execID string) (types.ContainerExecInspect, error) {
-	args := m.Called(ctx, execID)
-	return args.Get(0).(types.ContainerExecInspect), args.Error(1)
+func (m *mockDockerClient) ExecInspect(ctx context.Context, execID string, opts mobyclient.ExecInspectOptions) (mobyclient.ExecInspectResult, error) {
+	args := m.Called(ctx, execID, opts)
+	return args.Get(0).(mobyclient.ExecInspectResult), args.Error(1)
 }
 
-func (m *mockDockerClient) ContainerWait(ctx context.Context, containerID string, condition container.WaitCondition) (<-chan container.WaitResponse, <-chan error) {
-	args := m.Called(ctx, containerID, condition)
-	return args.Get(0).(<-chan container.WaitResponse), args.Get(1).(<-chan error)
+func (m *mockDockerClient) ContainerStatPath(ctx context.Context, containerID string, opts mobyclient.ContainerStatPathOptions) (mobyclient.ContainerStatPathResult, error) {
+	args := m.Called(ctx, containerID, opts)
+	return args.Get(0).(mobyclient.ContainerStatPathResult), args.Error(1)
 }
 
-func (m *mockDockerClient) CopyToContainer(ctx context.Context, id, path string, content io.Reader, options types.CopyToContainerOptions) error {
-	args := m.Called(ctx, id, path, content, options)
-	return args.Error(0)
+func (m *mockDockerClient) ContainerAttach(ctx context.Context, containerID string, opts mobyclient.ContainerAttachOptions) (mobyclient.ContainerAttachResult, error) {
+	args := m.Called(ctx, containerID, opts)
+	return args.Get(0).(mobyclient.ContainerAttachResult), args.Error(1)
+}
+
+func (m *mockDockerClient) ContainerWait(ctx context.Context, containerID string, opts mobyclient.ContainerWaitOptions) mobyclient.ContainerWaitResult {
+	args := m.Called(ctx, containerID, opts)
+	return args.Get(0).(mobyclient.ContainerWaitResult)
+}
+
+func (m *mockDockerClient) CopyToContainer(ctx context.Context, id string, options mobyclient.CopyToContainerOptions) (mobyclient.CopyToContainerResult, error) {
+	args := m.Called(ctx, id, options)
+	return args.Get(0).(mobyclient.CopyToContainerResult), args.Error(1)
+}
+
+func (m *mockDockerClient) ContainerInspect(ctx context.Context, id string, opts mobyclient.ContainerInspectOptions) (mobyclient.ContainerInspectResult, error) {
+	args := m.Called(ctx, id, opts)
+	return args.Get(0).(mobyclient.ContainerInspectResult), args.Error(1)
+}
+
+func (m *mockDockerClient) ContainerList(ctx context.Context, opts mobyclient.ContainerListOptions) (mobyclient.ContainerListResult, error) {
+	args := m.Called(ctx, opts)
+	return args.Get(0).(mobyclient.ContainerListResult), args.Error(1)
+}
+
+func (m *mockDockerClient) ContainerRemove(ctx context.Context, id string, opts mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error) {
+	args := m.Called(ctx, id, opts)
+	return args.Get(0).(mobyclient.ContainerRemoveResult), args.Error(1)
+}
+
+func (m *mockDockerClient) ContainerKill(ctx context.Context, id string, opts mobyclient.ContainerKillOptions) (mobyclient.ContainerKillResult, error) {
+	args := m.Called(ctx, id, opts)
+	return args.Get(0).(mobyclient.ContainerKillResult), args.Error(1)
+}
+
+func (m *mockDockerClient) NetworkList(ctx context.Context, opts mobyclient.NetworkListOptions) (mobyclient.NetworkListResult, error) {
+	args := m.Called(ctx, opts)
+	return args.Get(0).(mobyclient.NetworkListResult), args.Error(1)
+}
+
+func (m *mockDockerClient) NetworkInspect(ctx context.Context, id string, opts mobyclient.NetworkInspectOptions) (mobyclient.NetworkInspectResult, error) {
+	args := m.Called(ctx, id, opts)
+	return args.Get(0).(mobyclient.NetworkInspectResult), args.Error(1)
+}
+
+func (m *mockDockerClient) NetworkRemove(ctx context.Context, id string, opts mobyclient.NetworkRemoveOptions) (mobyclient.NetworkRemoveResult, error) {
+	args := m.Called(ctx, id, opts)
+	return args.Get(0).(mobyclient.NetworkRemoveResult), args.Error(1)
 }
 
 type endlessReader struct {
@@ -125,10 +177,12 @@ func TestDockerExecAbort(t *testing.T) {
 	conn.On("Write", mock.AnythingOfType("[]uint8")).Return(1, nil)
 
 	client := &mockDockerClient{}
-	client.On("ContainerExecCreate", ctx, "123", mock.AnythingOfType("types.ExecConfig")).Return(types.IDResponse{ID: "id"}, nil)
-	client.On("ContainerExecAttach", ctx, "id", mock.AnythingOfType("types.ExecStartCheck")).Return(types.HijackedResponse{
-		Conn:   conn,
-		Reader: bufio.NewReader(endlessReader{}),
+	client.On("ExecCreate", ctx, "123", mock.AnythingOfType("client.ExecCreateOptions")).Return(mobyclient.ExecCreateResult{ID: "id"}, nil)
+	client.On("ExecAttach", ctx, "id", mock.AnythingOfType("client.ExecAttachOptions")).Return(mobyclient.ExecAttachResult{
+		HijackedResponse: mobyclient.HijackedResponse{
+			Conn:   conn,
+			Reader: bufio.NewReader(endlessReader{}),
+		},
 	}, nil)
 
 	cr := &containerReference{
@@ -162,12 +216,14 @@ func TestDockerExecFailure(t *testing.T) {
 	conn := &mockConn{}
 
 	client := &mockDockerClient{}
-	client.On("ContainerExecCreate", ctx, "123", mock.AnythingOfType("types.ExecConfig")).Return(types.IDResponse{ID: "id"}, nil)
-	client.On("ContainerExecAttach", ctx, "id", mock.AnythingOfType("types.ExecStartCheck")).Return(types.HijackedResponse{
-		Conn:   conn,
-		Reader: bufio.NewReader(strings.NewReader("output")),
+	client.On("ExecCreate", ctx, "123", mock.AnythingOfType("client.ExecCreateOptions")).Return(mobyclient.ExecCreateResult{ID: "id"}, nil)
+	client.On("ExecAttach", ctx, "id", mock.AnythingOfType("client.ExecAttachOptions")).Return(mobyclient.ExecAttachResult{
+		HijackedResponse: mobyclient.HijackedResponse{
+			Conn:   conn,
+			Reader: bufio.NewReader(strings.NewReader("output")),
+		},
 	}, nil)
-	client.On("ContainerExecInspect", ctx, "id").Return(types.ContainerExecInspect{
+	client.On("ExecInspect", ctx, "id", mobyclient.ExecInspectOptions{}).Return(mobyclient.ExecInspectResult{
 		ExitCode: 1,
 	}, nil)
 
@@ -189,6 +245,71 @@ func TestDockerExecFailure(t *testing.T) {
 	client.AssertExpectations(t)
 }
 
+// stdcopyFrame wraps payload in a single Docker multiplexed-stream frame, the
+// format StdCopy expects: an 8-byte header (stream type + 4-byte big-endian
+// length) followed by the payload.
+func stdcopyFrame(stream stdcopy.StdType, payload string) []byte {
+	b := make([]byte, 8+len(payload))
+	b[0] = byte(stream)
+	binary.BigEndian.PutUint32(b[4:8], uint32(len(payload)))
+	copy(b[8:], payload)
+	return b
+}
+
+// TestDockerAttachFlushesTrailingLine verifies that wait() blocks until the
+// attach() streaming goroutine has drained and flushed the container's output,
+// so a final line without a trailing newline is not lost.
+func TestDockerAttachFlushesTrailingLine(t *testing.T) {
+	ctx := context.Background()
+
+	framed := bytes.NewBuffer(stdcopyFrame(stdcopy.Stdout, "line one\nlast line without newline"))
+
+	var lines []string
+	logWriter := common.NewLineWriter(func(s string) bool {
+		lines = append(lines, s)
+		return true
+	})
+
+	client := &mockDockerClient{}
+	client.On("ContainerAttach", ctx, "123", mock.AnythingOfType("client.ContainerAttachOptions")).
+		Return(mobyclient.ContainerAttachResult{
+			HijackedResponse: mobyclient.HijackedResponse{
+				Conn:   &mockConn{},
+				Reader: bufio.NewReader(framed),
+			},
+		}, nil)
+
+	statusCh := make(chan container.WaitResponse, 1)
+	statusCh <- container.WaitResponse{StatusCode: 0}
+	errCh := make(chan error, 1)
+	client.On("ContainerWait", ctx, "123", mobyclient.ContainerWaitOptions{Condition: container.WaitConditionNotRunning}).
+		Return(mobyclient.ContainerWaitResult{
+			Result: (<-chan container.WaitResponse)(statusCh),
+			Error:  (<-chan error)(errCh),
+		})
+
+	cr := &containerReference{
+		id:  "123",
+		cli: client,
+		input: &NewContainerInput{
+			Image:  "image",
+			Stdout: logWriter,
+			Stderr: logWriter,
+		},
+	}
+
+	require.NoError(t, cr.attach()(ctx))
+	require.NoError(t, cr.wait()(ctx))
+
+	// wait() must have blocked until the goroutine drained AND flushed; the
+	// trailing, non-newline-terminated line must therefore be present. Reading
+	// lines here is race-free because wait() synchronizes on attachDone, which
+	// the goroutine closes after the final append.
+	assert.Equal(t, []string{"line one\n", "last line without newline"}, lines)
+
+	client.AssertExpectations(t)
+}
+
 func TestDockerWaitFailure(t *testing.T) {
 	ctx := context.Background()
 
@@ -197,8 +318,11 @@ func TestDockerWaitFailure(t *testing.T) {
 	errCh := make(chan error, 1)
 
 	client := &mockDockerClient{}
-	client.On("ContainerWait", ctx, "123", container.WaitConditionNotRunning).
-		Return((<-chan container.WaitResponse)(statusCh), (<-chan error)(errCh))
+	client.On("ContainerWait", ctx, "123", mobyclient.ContainerWaitOptions{Condition: container.WaitConditionNotRunning}).
+		Return(mobyclient.ContainerWaitResult{
+			Result: (<-chan container.WaitResponse)(statusCh),
+			Error:  (<-chan error)(errCh),
+		})
 
 	cr := &containerReference{
 		id:  "123",
@@ -217,14 +341,38 @@ func TestDockerWaitFailure(t *testing.T) {
 	client.AssertExpectations(t)
 }
 
+// stubStatPath answers path resolution: the given paths exist, mapped to their target
+// when they are a symlink, everything else does not exist.
+func stubStatPath(client *mockDockerClient, existing map[string]string) {
+	for containerPath, target := range existing {
+		client.On("ContainerStatPath", mock.Anything, "123", mobyclient.ContainerStatPathOptions{Path: containerPath}).
+			Return(mobyclient.ContainerStatPathResult{Stat: container.PathStat{LinkTarget: target}}, nil).Maybe()
+	}
+	client.On("ContainerStatPath", mock.Anything, "123", mock.Anything).
+		Return(mobyclient.ContainerStatPathResult{}, cerrdefs.ErrNotFound).Maybe()
+}
+
+// The mkdir tarball is extracted at the deepest existing ancestor, with entries relative
+// to it that never traverse the "/var/run" symlink, see moby/moby#53258.
 func TestDockerCopyTarStream(t *testing.T) {
 	ctx := context.Background()
 
-	conn := &mockConn{}
-
+	var mkdirNames []string
 	client := &mockDockerClient{}
-	client.On("CopyToContainer", ctx, "123", "/", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(nil)
-	client.On("CopyToContainer", ctx, "123", "/var/run/act", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(nil)
+	stubStatPath(client, map[string]string{"/var": "", "/var/run": "/run", "/run": ""})
+	client.On("CopyToContainer", ctx, "123", mock.MatchedBy(func(opts mobyclient.CopyToContainerOptions) bool {
+		if opts.DestinationPath != "/run" || opts.Content == nil {
+			return false
+		}
+		tr := tar.NewReader(opts.Content)
+		for hdr, err := tr.Next(); err == nil; hdr, err = tr.Next() {
+			mkdirNames = append(mkdirNames, hdr.Name)
+		}
+		return true
+	})).Return(mobyclient.CopyToContainerResult{}, nil)
+	client.On("CopyToContainer", ctx, "123", mock.MatchedBy(func(opts mobyclient.CopyToContainerOptions) bool {
+		return opts.DestinationPath == "/run/act" && opts.Content != nil
+	})).Return(mobyclient.CopyToContainerResult{}, nil)
 	cr := &containerReference{
 		id:  "123",
 		cli: client,
@@ -233,60 +381,231 @@ func TestDockerCopyTarStream(t *testing.T) {
 		},
 	}
 
-	_ = cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{})
+	require.NoError(t, cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{}))
+	assert.Equal(t, []string{"act"}, mkdirNames)
 
-	conn.AssertExpectations(t)
 	client.AssertExpectations(t)
 }
 
-func TestDockerCopyTarStreamErrorInCopyFiles(t *testing.T) {
-	ctx := context.Background()
-
-	conn := &mockConn{}
-
+func TestDockerCopyTarStreamErrors(t *testing.T) {
 	merr := errors.New("Failure")
+	for _, testCase := range []struct {
+		name     string
+		mkdirErr error
+		copyErr  error
+	}{
+		{"mkdir", merr, nil},
+		{"copy content", nil, merr},
+	} {
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx := context.Background()
 
-	client := &mockDockerClient{}
-	client.On("CopyToContainer", ctx, "123", "/", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(merr)
-	client.On("CopyToContainer", ctx, "123", "/", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(merr)
-	cr := &containerReference{
-		id:  "123",
-		cli: client,
-		input: &NewContainerInput{
-			Image: "image",
-		},
+			client := &mockDockerClient{}
+			stubStatPath(client, map[string]string{"/var": "", "/var/run": ""})
+			client.On("CopyToContainer", ctx, "123", mock.MatchedBy(func(opts mobyclient.CopyToContainerOptions) bool {
+				return opts.DestinationPath == "/var/run" && opts.Content != nil
+			})).Return(mobyclient.CopyToContainerResult{}, testCase.mkdirErr)
+			client.On("CopyToContainer", ctx, "123", mock.MatchedBy(func(opts mobyclient.CopyToContainerOptions) bool {
+				return opts.DestinationPath == "/var/run/act" && opts.Content != nil
+			})).Return(mobyclient.CopyToContainerResult{}, testCase.copyErr).Maybe()
+			cr := &containerReference{
+				id:  "123",
+				cli: client,
+				input: &NewContainerInput{
+					Image: "image",
+				},
+			}
+
+			require.ErrorIs(t, cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{}), merr)
+
+			client.AssertExpectations(t)
+		})
 	}
+}
 
-	err := cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{})
-	assert.ErrorIs(t, err, merr) //nolint:testifylint // pre-existing issue from nektos/act
+// A remove that raced the daemon's AutoRemove teardown is not a failure and must not
+// be logged as one.
+func TestRemoveIgnoresAutoRemoveRace(t *testing.T) {
+	removeOpts := mobyclient.ContainerRemoveOptions{RemoveVolumes: true, Force: true}
+	killOpts := mobyclient.ContainerKillOptions{Signal: "SIGKILL"}
+	for _, tc := range []struct {
+		name        string
+		err         error
+		wantWait    bool
+		wantFailure bool
+	}{
+		{name: "removal in progress", err: cerrdefs.ErrConflict.WithMessage("removal of container abc is already in progress"), wantWait: true},
+		{name: "already removed", err: cerrdefs.ErrNotFound.WithMessage("No such container: abc")},
+		{name: "removed cleanly", err: nil},
+		{name: "real failure", err: errors.New("driver failed to remove root filesystem"), wantFailure: true},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			logger, hook := test.NewNullLogger()
+			ctx := common.WithLogger(context.Background(), logger)
+			client := &mockDockerClient{}
+			client.On("ContainerKill", ctx, "abc", killOpts).Return(mobyclient.ContainerKillResult{}, nil)
+			client.On("ContainerRemove", ctx, "abc", removeOpts).Return(mobyclient.ContainerRemoveResult{}, tc.err)
+			if tc.wantWait {
+				removed := make(chan container.WaitResponse, 1)
+				removed <- container.WaitResponse{}
+				client.On("ContainerWait", mock.Anything, "abc", mobyclient.ContainerWaitOptions{Condition: container.WaitConditionRemoved}).
+					Return(mobyclient.ContainerWaitResult{Result: removed})
+			}
+			cr := &containerReference{id: "abc", cli: client}
 
-	conn.AssertExpectations(t)
+			require.NoError(t, cr.remove()(ctx))
+			// a failure keeps the id, so a later Remove() can retry it
+			if tc.wantFailure {
+				assert.Equal(t, "abc", cr.id)
+				assert.Len(t, hook.AllEntries(), 1)
+			} else {
+				assert.Empty(t, cr.id)
+				assert.Empty(t, hook.AllEntries())
+			}
+			client.AssertExpectations(t)
+		})
+	}
+}
+
+// A container whose id was never learned, because find() could not reach the daemon or
+// create() lost its reply, must still be removed rather than leaking with its network. It
+// was never started here, so it is not worth a kill of its own.
+func TestRemoveWithoutIDUsesName(t *testing.T) {
+	ctx := context.Background()
+	client := &mockDockerClient{}
+	client.On("ContainerRemove", ctx, "job-1", mobyclient.ContainerRemoveOptions{RemoveVolumes: true, Force: true}).
+		Return(mobyclient.ContainerRemoveResult{}, nil)
+	cr := &containerReference{cli: client, input: &NewContainerInput{Name: "job-1"}}
+
+	require.NoError(t, cr.remove()(ctx))
 	client.AssertExpectations(t)
 }
 
-func TestDockerCopyTarStreamErrorInMkdir(t *testing.T) {
+// find() must drop a stale cached id so later Copy/Exec don't hit the
+// daemon with a torn-down container.
+func TestFindRevalidatesStaleID(t *testing.T) {
+	ctx := context.Background()
+	notFound := cerrdefs.ErrNotFound.WithMessage("No such container")
+	boom := errors.New("daemon unreachable")
+	newCR := func(id string) (*containerReference, *mockDockerClient) {
+		client := &mockDockerClient{}
+		return &containerReference{id: id, cli: client, input: &NewContainerInput{Name: "job-1"}}, client
+	}
+	listOpts := mobyclient.ContainerListOptions{All: true}
+	inspectOpts := mobyclient.ContainerInspectOptions{}
+
+	t.Run("stale id cleared, name lookup empty", func(t *testing.T) {
+		cr, client := newCR("stale")
+		client.On("ContainerInspect", ctx, "stale", inspectOpts).Return(mobyclient.ContainerInspectResult{}, notFound)
+		client.On("ContainerList", ctx, listOpts).Return(mobyclient.ContainerListResult{}, nil)
+		require.NoError(t, cr.find()(ctx))
+		assert.Empty(t, cr.id)
+		client.AssertExpectations(t)
+	})
+
+	t.Run("stale id cleared, name lookup repopulates", func(t *testing.T) {
+		cr, client := newCR("stale")
+		client.On("ContainerInspect", ctx, "stale", inspectOpts).Return(mobyclient.ContainerInspectResult{}, notFound)
+		client.On("ContainerList", ctx, listOpts).Return(mobyclient.ContainerListResult{Items: []container.Summary{
+			{ID: "other", Names: []string{"/somebody-else"}},
+			{ID: "fresh", Names: []string{"/job-1"}},
+		}}, nil)
+		require.NoError(t, cr.find()(ctx))
+		assert.Equal(t, "fresh", cr.id)
+		client.AssertExpectations(t)
+	})
+
+	t.Run("live id kept", func(t *testing.T) {
+		cr, client := newCR("live")
+		client.On("ContainerInspect", ctx, "live", inspectOpts).Return(mobyclient.ContainerInspectResult{}, nil)
+		require.NoError(t, cr.find()(ctx))
+		assert.Equal(t, "live", cr.id)
+		client.AssertExpectations(t)
+	})
+
+	t.Run("transient inspect error trusts cache", func(t *testing.T) {
+		cr, client := newCR("live")
+		client.On("ContainerInspect", ctx, "live", inspectOpts).Return(mobyclient.ContainerInspectResult{}, boom)
+		require.NoError(t, cr.find()(ctx))
+		assert.Equal(t, "live", cr.id)
+		client.AssertExpectations(t)
+	})
+
+	t.Run("list error propagates", func(t *testing.T) {
+		cr, client := newCR("")
+		client.On("ContainerList", ctx, listOpts).Return(mobyclient.ContainerListResult{}, boom)
+		require.ErrorIs(t, cr.find()(ctx), boom)
+		client.AssertExpectations(t)
+	})
+}
+
+// Every daemon entry point fails fast with a clear, container-named
+// error when no live cr.id is known.
+func TestRejectsMissingContainer(t *testing.T) {
+	ctx := context.Background()
+	client := &mockDockerClient{}
+	client.On("ContainerList", ctx, mobyclient.ContainerListOptions{All: true}).Return(mobyclient.ContainerListResult{}, nil)
+	cr := &containerReference{cli: client, input: &NewContainerInput{Name: "job-1"}}
+	check := func(op string, err error) {
+		t.Helper()
+		require.Error(t, err, op)
+		assert.Contains(t, err.Error(), `container "job-1" does not exist`, op)
+	}
+	check("copyContent", cr.copyContent("/var/run/act", &FileEntry{Name: "x", Mode: 0o644})(ctx))
+	check("copyDir", cr.copyDir("/var/run/act", "/src", false)(ctx))
+	check("CopyTarStream", cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{}))
+	check("exec", cr.exec([]string{"echo"}, nil, "", "")(ctx))
+	_, err := cr.GetContainerArchive(ctx, "/var/run/act/x")
+	check("GetContainerArchive", err)
+}
+
+// End-to-end: a stale cr.id is cleared, repopulated from name lookup,
+// and the Copy completes against the fresh id.
+func TestPublicCopyPipelineHandlesStaleID(t *testing.T) {
+	ctx := context.Background()
+	client := &mockDockerClient{}
+	client.On("ContainerInspect", ctx, "stale", mobyclient.ContainerInspectOptions{}).
+		Return(mobyclient.ContainerInspectResult{}, cerrdefs.ErrNotFound.WithMessage("gone"))
+	client.On("ContainerList", ctx, mobyclient.ContainerListOptions{All: true}).
+		Return(mobyclient.ContainerListResult{Items: []container.Summary{
+			{ID: "fresh", Names: []string{"/job-1"}},
+		}}, nil)
+	client.On("CopyToContainer", ctx, "fresh", mock.MatchedBy(func(opts mobyclient.CopyToContainerOptions) bool {
+		return opts.DestinationPath == "/var/run/act"
+	})).Return(mobyclient.CopyToContainerResult{}, nil)
+
+	cr := &containerReference{id: "stale", cli: client, input: &NewContainerInput{Name: "job-1"}}
+	require.NoError(t, cr.Copy("/var/run/act", &FileEntry{Name: "x", Mode: 0o644})(ctx))
+	assert.Equal(t, "fresh", cr.id)
+	client.AssertExpectations(t)
+}
+
+// TestDockerCopyToSymlinkPath is a regression test for gitea/runner#981. Most base images
+// symlink /var/run to /run, so copying into /var/run/act traverses that symlink. The broken
+// docker 29.5.1 daemon fails the extraction with "mkdirat var/run: file exists" (fixed in
+// 29.5.2). Running against the daemon shipped in the dind image, this catches a bad bump.
+func TestDockerCopyToSymlinkPath(t *testing.T) {
+	requireDocker(t)
 	ctx := context.Background()
 
-	conn := &mockConn{}
+	rc := NewContainer(&NewContainerInput{
+		Image:      "alpine:latest",
+		Entrypoint: []string{"sleep", "30"},
+		Name:       "act-test-symlink-" + time.Now().Format("20060102150405.000000"),
+		AutoRemove: true,
+	})
+	require.NoError(t, rc.Pull(false)(ctx))
+	require.NoError(t, rc.Create(nil, nil)(ctx))
+	require.NoError(t, rc.Start(false)(ctx))
+	t.Cleanup(func() {
+		_ = rc.Remove()(ctx)
+		_ = rc.Close()(ctx)
+	})
 
-	merr := errors.New("Failure")
-
-	client := &mockDockerClient{}
-	client.On("CopyToContainer", ctx, "123", "/", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(nil)
-	client.On("CopyToContainer", ctx, "123", "/var/run/act", mock.Anything, mock.AnythingOfType("types.CopyToContainerOptions")).Return(merr)
-	cr := &containerReference{
-		id:  "123",
-		cli: client,
-		input: &NewContainerInput{
-			Image: "image",
-		},
-	}
-
-	err := cr.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{})
-	assert.ErrorIs(t, err, merr) //nolint:testifylint // pre-existing issue from nektos/act
-
-	conn.AssertExpectations(t)
-	client.AssertExpectations(t)
+	// CopyTarStream resolves the var/run symlink and creates act below its target, the
+	// exact step that fails on a broken daemon.
+	err := rc.CopyTarStream(ctx, "/var/run/act", &bytes.Buffer{})
+	require.NoError(t, err)
 }
 
 // Type assert containerReference implements ExecutionsEnvironment
@@ -364,3 +683,163 @@ func TestCheckVolumes(t *testing.T) {
 		})
 	}
 }
+
+func TestSanitizeOptionsHostConfig(t *testing.T) {
+	logger, _ := test.NewNullLogger()
+
+	dangerous := func() *container.HostConfig {
+		return &container.HostConfig{
+			PidMode:      "host",
+			IpcMode:      "host",
+			UTSMode:      "host",
+			CgroupnsMode: "host",
+			UsernsMode:   "host",
+			CapAdd:       []string{"ALL"},
+			SecurityOpt:  []string{"seccomp=unconfined", "apparmor=unconfined"},
+			VolumesFrom:  []string{"other"},
+			Runtime:      "runc",
+			Resources: container.Resources{
+				CgroupParent:      "/custom",
+				Devices:           []container.DeviceMapping{{PathOnHost: "/dev/sda", PathInContainer: "/dev/sda", CgroupPermissions: "rwm"}},
+				DeviceCgroupRules: []string{"a *:* rwm"},
+			},
+			Sysctls: map[string]string{"net.ipv4.ip_forward": "1"},
+		}
+	}
+
+	hostConfig := dangerous()
+	sanitizeOptionsHostConfig(logger, hostConfig)
+
+	assert.Empty(t, string(hostConfig.PidMode))
+	assert.Empty(t, string(hostConfig.IpcMode))
+	assert.Empty(t, string(hostConfig.UTSMode))
+	assert.Empty(t, string(hostConfig.CgroupnsMode))
+	assert.Empty(t, string(hostConfig.UsernsMode))
+	assert.Empty(t, hostConfig.CapAdd)
+	assert.Empty(t, hostConfig.SecurityOpt)
+	assert.Empty(t, hostConfig.Devices)
+	assert.Empty(t, hostConfig.DeviceCgroupRules)
+	assert.Empty(t, hostConfig.VolumesFrom)
+	assert.Empty(t, hostConfig.Runtime)
+	assert.Empty(t, hostConfig.CgroupParent)
+	assert.Empty(t, hostConfig.Sysctls)
+}
+
+func TestMergeContainerConfigsStripsDangerousOptionsWhenUnprivileged(t *testing.T) {
+	// OS-independent options only: --device parsing requires a linux/windows
+	// server OS, which is not guaranteed for the test host.
+	const dangerousOptions = "--pid=host --ipc=host --uts=host --cgroupns=host " +
+		"--userns=host --cap-add=ALL --security-opt seccomp=unconfined " +
+		"--security-opt apparmor=unconfined --volumes-from other " +
+		"--runtime runc --cgroup-parent /custom --sysctl net.ipv4.ip_forward=1"
+
+	t.Run("unprivileged strips host-escape options", func(t *testing.T) {
+		logger, _ := test.NewNullLogger()
+		ctx := common.WithLogger(context.Background(), logger)
+		cr := &containerReference{
+			input: &NewContainerInput{
+				Options:     dangerousOptions,
+				NetworkMode: "bridge",
+				UsernsMode:  "private",
+			},
+		}
+
+		_, hostConfig, err := cr.mergeContainerConfigs(ctx, &container.Config{}, &container.HostConfig{
+			Privileged:  false,
+			UsernsMode:  container.UsernsMode("private"),
+			NetworkMode: container.NetworkMode("bridge"),
+		})
+		require.NoError(t, err)
+
+		assert.False(t, hostConfig.Privileged)
+		assert.Empty(t, string(hostConfig.PidMode))
+		assert.Empty(t, string(hostConfig.IpcMode))
+		assert.Empty(t, string(hostConfig.UTSMode))
+		assert.Empty(t, string(hostConfig.CgroupnsMode))
+		// UsernsMode must keep the runner-controlled value, not the one from options.
+		assert.Equal(t, "private", string(hostConfig.UsernsMode))
+		assert.Empty(t, hostConfig.CapAdd)
+		assert.Empty(t, hostConfig.SecurityOpt)
+		assert.Empty(t, hostConfig.VolumesFrom)
+		assert.Empty(t, hostConfig.Runtime)
+		assert.Empty(t, hostConfig.CgroupParent)
+		assert.Empty(t, hostConfig.Sysctls)
+	})
+
+	t.Run("privileged preserves options", func(t *testing.T) {
+		logger, _ := test.NewNullLogger()
+		ctx := common.WithLogger(context.Background(), logger)
+		cr := &containerReference{
+			input: &NewContainerInput{
+				Options:     "--pid=host --cap-add=ALL --security-opt seccomp=unconfined",
+				NetworkMode: "bridge",
+			},
+		}
+
+		_, hostConfig, err := cr.mergeContainerConfigs(ctx, &container.Config{}, &container.HostConfig{
+			Privileged:  true,
+			NetworkMode: container.NetworkMode("bridge"),
+		})
+		require.NoError(t, err)
+
+		assert.Equal(t, "host", string(hostConfig.PidMode))
+		assert.Equal(t, []string{"ALL"}, hostConfig.CapAdd)
+		assert.Equal(t, []string{"seccomp=unconfined"}, hostConfig.SecurityOpt)
+	})
+}
+
+func TestCheckVolumesRejectsEscapingHostPaths(t *testing.T) {
+	logger, _ := test.NewNullLogger()
+	ctx := common.WithLogger(context.Background(), logger)
+
+	base := t.TempDir()
+	allowed := filepath.Join(base, "allowed")
+	denied := filepath.Join(base, "denied")
+	require.NoError(t, os.MkdirAll(allowed, 0o700))
+	require.NoError(t, os.MkdirAll(denied, 0o700))
+
+	cr := &containerReference{
+		input: &NewContainerInput{
+			ValidVolumes: []string{filepath.Join(allowed, "**")},
+		},
+	}
+
+	escapingPath := allowed + string(filepath.Separator) + ".." + string(filepath.Separator) + "denied"
+	_, hostConf := cr.sanitizeConfig(ctx, &container.Config{}, &container.HostConfig{
+		Binds: []string{escapingPath + ":/mnt"},
+	})
+	assert.Empty(t, hostConf.Binds)
+
+	linkPath := filepath.Join(allowed, "link")
+	if err := os.Symlink(denied, linkPath); err != nil {
+		t.Skipf("cannot create symlink: %v", err)
+	}
+	_, hostConf = cr.sanitizeConfig(ctx, &container.Config{}, &container.HostConfig{
+		Binds: []string{linkPath + ":/mnt"},
+	})
+	assert.Empty(t, hostConf.Binds)
+
+	_, hostConf = cr.sanitizeConfig(ctx, &container.Config{}, &container.HostConfig{
+		Binds: []string{filepath.Join(linkPath, "missing") + ":/mnt"},
+	})
+	assert.Empty(t, hostConf.Binds)
+}
+
+func TestMergeContainerConfigsVolumesReplaceRunnerMounts(t *testing.T) {
+	logger, _ := test.NewNullLogger()
+	ctx := common.WithLogger(context.Background(), logger)
+	cr := &containerReference{
+		input: &NewContainerInput{
+			NetworkMode: "bridge",
+			Options:     "--volume /host/tools:/opt/hostedtoolcache",
+		},
+	}
+
+	_, hostConf, err := cr.mergeContainerConfigs(ctx, &container.Config{}, &container.HostConfig{
+		Binds:  []string{"/var/run/docker.sock:/var/run/docker.sock"},
+		Mounts: []mount.Mount{{Type: mount.TypeVolume, Source: "act-toolcache", Target: "/opt/hostedtoolcache"}},
+	})
+	require.NoError(t, err)
+	assert.Equal(t, []string{"/var/run/docker.sock:/var/run/docker.sock", "/host/tools:/opt/hostedtoolcache"}, hostConf.Binds)
+	assert.Empty(t, hostConf.Mounts)
+}

act/container/docker_socket_test.go

@@ -18,9 +18,19 @@ func init() {
 
 var originalCommonSocketLocations = CommonSocketLocations
 
+func isolateSocketEnv(t *testing.T) {
+	t.Helper()
+	t.Cleanup(func() { CommonSocketLocations = originalCommonSocketLocations })
+	if host, ok := os.LookupEnv("DOCKER_HOST"); ok {
+		t.Setenv("DOCKER_HOST", host)
+	} else {
+		t.Cleanup(func() { os.Unsetenv("DOCKER_HOST") })
+	}
+}
+
 func TestGetSocketAndHostWithSocket(t *testing.T) {
 	// Arrange
-	CommonSocketLocations = originalCommonSocketLocations
+	isolateSocketEnv(t)
 	dockerHost := "unix:///my/docker/host.sock"
 	socketURI := "/path/to/my.socket"
 	t.Setenv("DOCKER_HOST", dockerHost)
@@ -48,9 +58,9 @@ func TestGetSocketAndHostNoSocket(t *testing.T) {
 
 func TestGetSocketAndHostOnlySocket(t *testing.T) {
 	// Arrange
+	isolateSocketEnv(t)
 	socketURI := "/path/to/my.socket"
 	os.Unsetenv("DOCKER_HOST")
-	CommonSocketLocations = originalCommonSocketLocations
 	defaultSocket, defaultSocketFound := socketLocation()
 
 	// Act
@@ -65,7 +75,7 @@ func TestGetSocketAndHostOnlySocket(t *testing.T) {
 
 func TestGetSocketAndHostDontMount(t *testing.T) {
 	// Arrange
-	CommonSocketLocations = originalCommonSocketLocations
+	isolateSocketEnv(t)
 	dockerHost := "unix:///my/docker/host.sock"
 	t.Setenv("DOCKER_HOST", dockerHost)
 
@@ -79,7 +89,7 @@ func TestGetSocketAndHostDontMount(t *testing.T) {
 
 func TestGetSocketAndHostNoHostNoSocket(t *testing.T) {
 	// Arrange
-	CommonSocketLocations = originalCommonSocketLocations
+	isolateSocketEnv(t)
 	os.Unsetenv("DOCKER_HOST")
 	defaultSocket, found := socketLocation()
 
@@ -97,6 +107,7 @@ func TestGetSocketAndHostNoHostNoSocket(t *testing.T) {
 // > This happens if neither DOCKER_HOST nor --container-daemon-socket has a value, but socketLocation() returns a URI
 func TestGetSocketAndHostNoHostNoSocketDefaultLocation(t *testing.T) {
 	// Arrange
+	isolateSocketEnv(t)
 	mySocketFile, tmpErr := os.CreateTemp(t.TempDir(), "act-*.sock")
 	mySocket := mySocketFile.Name()
 	unixSocket := "unix://" + mySocket
@@ -119,6 +130,7 @@ func TestGetSocketAndHostNoHostNoSocketDefaultLocation(t *testing.T) {
 
 func TestGetSocketAndHostNoHostInvalidSocket(t *testing.T) {
 	// Arrange
+	isolateSocketEnv(t)
 	os.Unsetenv("DOCKER_HOST")
 	mySocket := "/my/socket/path.sock"
 	CommonSocketLocations = []string{"/unusual", "/socket", "/location"}
@@ -136,6 +148,7 @@ func TestGetSocketAndHostNoHostInvalidSocket(t *testing.T) {
 
 func TestGetSocketAndHostOnlySocketValidButUnusualLocation(t *testing.T) {
 	// Arrange
+	isolateSocketEnv(t)
 	socketURI := "unix:///path/to/my.socket"
 	CommonSocketLocations = []string{"/unusual", "/location"}
 	os.Unsetenv("DOCKER_HOST")

act/container/docker_stub.go

@@ -8,12 +8,13 @@ package container
 
 import (
 	"context"
+	"errors"
 	"runtime"
+	"time"
 
 	"gitea.com/gitea/runner/act/common"
 
-	"github.com/docker/docker/api/types"
-	"github.com/pkg/errors"
+	"github.com/moby/moby/api/types/system"
 )
 
 // ImageExistsLocally returns a boolean indicating if an image with the
@@ -51,8 +52,8 @@ func RunnerArch(ctx context.Context) string {
 	return runtime.GOOS
 }
 
-func GetHostInfo(ctx context.Context) (info types.Info, err error) {
-	return types.Info{}, nil
+func GetHostInfo(ctx context.Context) (info system.Info, err error) {
+	return system.Info{}, nil
 }
 
 func NewDockerVolumeRemoveExecutor(volume string, force bool) common.Executor {
@@ -61,7 +62,7 @@ func NewDockerVolumeRemoveExecutor(volume string, force bool) common.Executor {
 	}
 }
 
-func NewDockerNetworkCreateExecutor(name string) common.Executor {
+func NewDockerNetworkCreateExecutor(name string, opts NewDockerNetworkCreateExecutorInput) common.Executor {
 	return func(ctx context.Context) error {
 		return nil
 	}
@@ -72,3 +73,7 @@ func NewDockerNetworkRemoveExecutor(name string) common.Executor {
 		return nil
 	}
 }
+
+func RemoveOrphanNetworks(ctx context.Context, runnerUUID string, createdBefore time.Time) error {
+	return nil
+}

act/container/docker_volume.go

@@ -11,8 +11,7 @@ import (
 
 	"gitea.com/gitea/runner/act/common"
 
-	"github.com/docker/docker/api/types/filters"
-	"github.com/docker/docker/api/types/volume"
+	"github.com/moby/moby/client"
 )
 
 func NewDockerVolumeRemoveExecutor(volumeName string, force bool) common.Executor {
@@ -23,12 +22,12 @@ func NewDockerVolumeRemoveExecutor(volumeName string, force bool) common.Executo
 		}
 		defer cli.Close()
 
-		list, err := cli.VolumeList(ctx, volume.ListOptions{Filters: filters.NewArgs()})
+		list, err := cli.VolumeList(ctx, client.VolumeListOptions{})
 		if err != nil {
 			return err
 		}
 
-		for _, vol := range list.Volumes {
+		for _, vol := range list.Items {
 			if vol.Name == volumeName {
 				return removeExecutor(volumeName, force)(ctx)
 			}
@@ -54,6 +53,7 @@ func removeExecutor(volume string, force bool) common.Executor {
 		}
 		defer cli.Close()
 
-		return cli.VolumeRemove(ctx, volume, force)
+		_, err = cli.VolumeRemove(ctx, volume, client.VolumeRemoveOptions{Force: force})
+		return err
 	}
 }

act/container/helpers_test.go

@@ -0,0 +1,27 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"context"
+	"testing"
+
+	mobyclient "github.com/moby/moby/client"
+)
+
+// requireDocker skips the test unless a reachable docker daemon is available.
+// GetDockerClient succeeds even without a running daemon (its ping is best-effort),
+// so the daemon has to be pinged explicitly here to decide whether to skip.
+func requireDocker(t *testing.T) {
+	t.Helper()
+	ctx := context.Background()
+	cli, err := GetDockerClient(ctx)
+	if err != nil {
+		t.Skipf("skipping: docker client unavailable: %v", err)
+	}
+	defer cli.Close()
+	if _, err := cli.Ping(ctx, mobyclient.PingOptions{}); err != nil {
+		t.Skipf("skipping: docker daemon unreachable: %v", err)
+	}
+}

act/container/host_environment.go

@@ -16,14 +16,15 @@ import (
 	"os/exec"
 	"path/filepath"
 	"runtime"
-	"strconv"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"gitea.com/gitea/runner/act/common"
 	"gitea.com/gitea/runner/act/filecollector"
 	"gitea.com/gitea/runner/act/lookpath"
+	"gitea.com/gitea/runner/internal/pkg/process"
 
 	"github.com/go-git/go-billy/v5/helper/polyfill"
 	"github.com/go-git/go-billy/v5/osfs"
@@ -36,15 +37,32 @@ type HostEnvironment struct {
 	TmpDir    string
 	ToolCache string
 	Workdir   string
-	// BindWorkdir is true when the app runner mounts the workspace on the host and
-	// deletes the task directory after the job; host teardown must not remove Workdir.
-	BindWorkdir bool
-	ActPath     string
-	CleanUp     func()
-	StdOut      io.Writer
+	// CleanWorkdir means teardown owns Workdir and may delete it. Leave false
+	// when Workdir points at a caller-owned checkout (e.g. `act` local mode).
+	CleanWorkdir bool
+	ActPath      string
+	CleanUp      func()
+	StdOut       io.Writer
+	AllocatePTY  bool // allocate a pseudo-TTY for each step's process
 
-	mu          sync.Mutex
-	runningPIDs map[int]struct{}
+	// procGroup owns every process the job's steps start. Atomic: Remove may read
+	// it while a step is still starting.
+	procGroupOnce sync.Once
+	procGroup     atomic.Pointer[process.Group]
+}
+
+// processGroup returns the job-scoped process group, creating it on first use.
+// Returns nil if the job object could not be created; Group is nil-safe.
+func (e *HostEnvironment) processGroup(ctx context.Context) *process.Group {
+	e.procGroupOnce.Do(func() {
+		group, err := process.NewGroup()
+		if err != nil {
+			common.Logger(ctx).Warnf("could not create the job's process group; processes a step leaves behind can only be reclaimed by the workspace scan: %v", err)
+			return
+		}
+		e.procGroup.Store(group)
+	})
+	return e.procGroup.Load()
 }
 
 func (e *HostEnvironment) Create(_, _ []string) common.Executor {
@@ -200,12 +218,12 @@ func (e *HostEnvironment) Start(_ bool) common.Executor {
 
 type ptyWriter struct {
 	Out       io.Writer
-	AutoStop  bool
+	AutoStop  atomic.Bool
 	dirtyLine bool
 }
 
 func (w *ptyWriter) Write(buf []byte) (int, error) {
-	if w.AutoStop && len(buf) > 0 && buf[len(buf)-1] == 4 {
+	if w.AutoStop.Load() && len(buf) > 0 && buf[len(buf)-1] == 4 {
 		n, err := w.Out.Write(buf[:len(buf)-1])
 		if err != nil {
 			return n, err
@@ -264,7 +282,7 @@ func setupPty(cmd *exec.Cmd, cmdline string) (*os.File, *os.File, error) {
 	cmd.Stdin = tty
 	cmd.Stdout = tty
 	cmd.Stderr = tty
-	cmd.SysProcAttr = getSysProcAttr(cmdline, true)
+	cmd.SysProcAttr = process.SysProcAttr(cmdline, true)
 	return ppty, tty, nil
 }
 
@@ -312,6 +330,10 @@ func (e *HostEnvironment) exec(ctx context.Context, command []string, cmdline st
 	} else {
 		wd = e.Path
 	}
+	// Flush any buffered, not-yet-newline-terminated trailing line, as the docker backend
+	// does in waitForCommand, so the final line of a command's output is not lost.
+	defer common.FlushWriter(e.StdOut)
+
 	f, err := lookupPathHost(command[0], env, e.StdOut)
 	if err != nil {
 		return err
@@ -324,7 +346,12 @@ func (e *HostEnvironment) exec(ctx context.Context, command []string, cmdline st
 	cmd.Env = envList
 	cmd.Stderr = e.StdOut
 	cmd.Dir = wd
-	cmd.SysProcAttr = getSysProcAttr(cmdline, false)
+	cmd.SysProcAttr = process.SysProcAttr(cmdline, false)
+
+	// Kills the step's whole tree on cancellation and bounds the post-exit I/O
+	// wait, so an orphan holding cmd's stdout pipe cannot hang cmd.Wait().
+	treeKill := process.NewTreeKill(cmd)
+
 	var ppty *os.File
 	var tty *os.File
 	defer func() {
@@ -335,40 +362,34 @@ func (e *HostEnvironment) exec(ctx context.Context, command []string, cmdline st
 			tty.Close()
 		}
 	}()
-	if true /* allocate Terminal */ {
+	if e.AllocatePTY {
 		var err error
 		ppty, tty, err = setupPty(cmd, cmdline)
 		if err != nil {
 			common.Logger(ctx).Debugf("Failed to setup Pty %v\n", err.Error())
 		}
 	}
-	writer := &ptyWriter{Out: e.StdOut}
-	logctx, finishLog := context.WithCancel(context.Background())
+	var writer *ptyWriter
+	var logctx context.Context
 	if ppty != nil {
+		writer = &ptyWriter{Out: e.StdOut}
+		var finishLog context.CancelFunc
+		logctx, finishLog = context.WithCancel(context.Background())
 		go copyPtyOutput(writer, ppty, finishLog)
-	} else {
-		finishLog()
-	}
-	if ppty != nil {
 		go writeKeepAlive(ppty)
 	}
-	// Split Start/Wait so the PID can be registered before the process can exit;
-	// cmd.Run() would block until exit, by which time the PID may have been reused.
 	if err := cmd.Start(); err != nil {
 		return err
 	}
-	if cmd.Process != nil {
-		e.mu.Lock()
-		if e.runningPIDs == nil {
-			e.runningPIDs = map[int]struct{}{}
-		}
-		e.runningPIDs[cmd.Process.Pid] = struct{}{}
-		e.mu.Unlock()
-		defer func(pid int) {
-			e.mu.Lock()
-			delete(e.runningPIDs, pid)
-			e.mu.Unlock()
-		}(cmd.Process.Pid)
+	// Assign before the step's Killer so the step's job nests inside the group's;
+	// cancellation still scopes to this step's tree.
+	if err := e.processGroup(ctx).Assign(cmd.Process); err != nil {
+		common.Logger(ctx).Warnf("could not assign the step's process to the job's process group; a process it leaves behind may outlive the job: %v", err)
+	}
+	if k, kerr := treeKill.Capture(cmd.Process); kerr != nil {
+		common.Logger(ctx).Warnf("process tree kill setup failed, falling back to single-process kill: %v", kerr)
+	} else {
+		defer k.Close()
 	}
 	err = cmd.Wait()
 	if err != nil {
@@ -379,14 +400,11 @@ func (e *HostEnvironment) exec(ctx context.Context, command []string, cmdline st
 		return err
 	}
 	if tty != nil {
-		writer.AutoStop = true
+		writer.AutoStop.Store(true)
 		if _, err := tty.WriteString("\x04"); err != nil {
 			common.Logger(ctx).Debug("Failed to write EOT")
 		}
-	}
-	<-logctx.Done()
-
-	if ppty != nil {
+		<-logctx.Done()
 		ppty.Close()
 		ppty = nil
 	}
@@ -415,6 +433,23 @@ func (e *HostEnvironment) UpdateFromEnv(srcPath string, env *map[string]string)
 	return parseEnvFile(e, srcPath, env)
 }
 
+// removeAll is a var so tests can substitute a blocking stub.
+var removeAll = os.RemoveAll
+
+// removeAllWithContext returns once the delete finishes or ctx is cancelled. On
+// cancellation the goroutine leaks: a delete inside a syscall cannot be
+// interrupted (see runWithTimeout).
+func removeAllWithContext(ctx context.Context, path string) error {
+	done := make(chan error, 1)
+	go func() { done <- removeAll(path) }()
+	select {
+	case err := <-done:
+		return err
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
 func removePathWithRetry(ctx context.Context, path string) error {
 	if path == "" {
 		return nil
@@ -434,64 +469,165 @@ func removePathWithRetry(ctx context.Context, path string) error {
 			case <-time.After(delay):
 			}
 		}
-		lastErr = os.RemoveAll(path)
+		lastErr = removeAllWithContext(ctx, path)
 		if lastErr == nil {
 			return nil
 		}
+		if errors.Is(lastErr, context.DeadlineExceeded) {
+			return lastErr
+		}
 	}
 	return lastErr
 }
 
+// buildWindowsWorkspaceKillScript builds a PowerShell command that taskkills
+// every process tree whose ExecutablePath or CommandLine references one of the
+// given workspace dirs, releasing file handles for cleanup. Win32_Process
+// exposes both fields (Get-Process doesn't, wmic is deprecated); matching is on
+// the dir+separator prefix via ordinal String methods, so a name-prefix sibling
+// (job1 vs job10) is spared and path metacharacters stay literal.
+func buildWindowsWorkspaceKillScript(dirs []string) string {
+	quoted := make([]string, len(dirs))
+	for i, d := range dirs {
+		// Single-quoted PowerShell literal; escape ' by doubling it.
+		quoted[i] = "'" + strings.ReplaceAll(d, "'", "''") + "'"
+	}
+
+	return `$paths = @(` + strings.Join(quoted, ",") + `)
+$selfPid = $PID
+Get-CimInstance Win32_Process -ErrorAction SilentlyContinue | Where-Object {
+    if ($_.ProcessId -eq $selfPid) { return $false }
+    foreach ($p in $paths) {
+        $prefix = $p + '\'
+        if ($_.ExecutablePath -and $_.ExecutablePath.StartsWith($prefix, [System.StringComparison]::OrdinalIgnoreCase)) { return $true }
+        if ($_.CommandLine -and $_.CommandLine.IndexOf($prefix, [System.StringComparison]::OrdinalIgnoreCase) -ge 0) { return $true }
+    }
+    return $false
+} | ForEach-Object {
+    & taskkill.exe /PID $_.ProcessId /T /F 2>$null | Out-Null
+}
+`
+}
+
 func (e *HostEnvironment) terminateRunningProcesses(ctx context.Context) {
 	if runtime.GOOS != "windows" {
 		return
 	}
-	e.mu.Lock()
-	pids := make([]int, 0, len(e.runningPIDs))
-	for pid := range e.runningPIDs {
-		pids = append(pids, pid)
-	}
-	e.mu.Unlock()
 
-	if len(pids) == 0 {
+	// Detached: exec.CommandContext won't start on a cancelled ctx, and a
+	// server cancel has already cancelled the parent ctx.
+	killCtx, killCancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer killCancel()
+
+	logger := common.Logger(ctx)
+
+	// Dirs we own; a process referencing one is a leftover. ToolCache is shared
+	// across jobs, and Workdir may be a caller-owned checkout.
+	owned := []string{e.Path, e.TmpDir}
+	if e.CleanWorkdir {
+		owned = append(owned, e.Workdir)
+	}
+	dirs := make([]string, 0, len(owned))
+	for _, d := range owned {
+		if d == "" {
+			continue
+		}
+		abs, err := filepath.Abs(d)
+		if err != nil {
+			continue
+		}
+		dirs = append(dirs, abs)
+	}
+	if len(dirs) == 0 {
 		return
 	}
 
-	logger := common.Logger(ctx)
-	for _, pid := range pids {
-		// Best-effort: forcibly terminate process tree to release file handles
-		// so that workspace cleanup can succeed on Windows.
-		cmd := exec.CommandContext(ctx, "taskkill", "/PID", strconv.Itoa(pid), "/T", "/F")
-		out, err := cmd.CombinedOutput()
-		if err != nil {
-			logger.Debugf("taskkill failed for pid=%d: %v output=%s", pid, err, strings.TrimSpace(string(out)))
-		}
+	script := buildWindowsWorkspaceKillScript(dirs)
+
+	cmd := exec.CommandContext(killCtx, "powershell.exe", "-NoProfile", "-NonInteractive", "-Command", script)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		logger.Debugf("workspace process-tree kill via PowerShell failed: %v output=%s", err, strings.TrimSpace(string(out)))
+	}
+
+	// Win32_Process exposes no working directory, so the scan above misses a
+	// process that merely runs in a workspace dir while pinning a handle on it.
+	if killed, err := process.KillProcessesWithCWDUnder(killCtx, dirs); err != nil {
+		logger.Debugf("workspace process kill by working directory reported errors: %v", err)
+	} else if killed > 0 {
+		logger.Debugf("terminated %d leftover process(es) by workspace working directory", killed)
+	}
+}
+
+// hostCleanupTimeout bounds each teardown phase so one stalled delete cannot
+// wedge the runner slot. A var so tests can shrink it.
+var hostCleanupTimeout = 30 * time.Second
+
+// runWithTimeout returns context.DeadlineExceeded once timeout elapses, leaking
+// the goroutine: a delete blocked in a syscall (AV filter driver, dead network
+// mount) cannot be interrupted, and leaking scratch state beats losing the
+// runner's capacity slot forever. The idle stale-dir sweep reclaims it later.
+func runWithTimeout(fn func(), timeout time.Duration) error {
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		fn()
+	}()
+	timer := time.NewTimer(timeout)
+	defer timer.Stop()
+	select {
+	case <-done:
+		return nil
+	case <-timer.C:
+		return context.DeadlineExceeded
 	}
 }
 
 func (e *HostEnvironment) Remove() common.Executor {
 	return func(ctx context.Context) error {
-		// Ensure any lingering child processes are ended before attempting
-		// to remove the workspace (Windows file locks otherwise prevent cleanup).
+		logger := common.Logger(ctx)
+
+		// End lingering processes before removing the workspace; on Windows their
+		// file locks block cleanup. Closing the group is deterministic, the scan a net.
+		if err := e.procGroup.Load().Close(); err != nil {
+			logger.Debugf("closing the job's process group failed: %v", err)
+		}
 		e.terminateRunningProcesses(ctx)
 
-		// Only removes per-job misc state. Must not remove the cache/toolcache root.
+		// Removes per-job misc state only, never the toolcache root. Bounded because
+		// CleanUp is a caller-supplied, typically unbounded os.RemoveAll.
 		if e.CleanUp != nil {
-			e.CleanUp()
+			logger.Debugf("running host environment cleanup callback")
+			if err := runWithTimeout(e.CleanUp, hostCleanupTimeout); err != nil {
+				logger.Warnf("host environment cleanup did not finish within %s; continuing job completion, scratch state may be leaked and is reclaimed by the idle stale-dir sweep", hostCleanupTimeout)
+			} else {
+				logger.Debugf("host environment cleanup callback finished")
+			}
 		}
-		logger := common.Logger(ctx)
+
+		// Detach: a cancelled ctx would skip removePathWithRetry's retries,
+		// which absorb Windows file-handle release lag after the kill above.
+		rmCtx, rmCancel := context.WithTimeout(context.Background(), hostCleanupTimeout)
+		defer rmCancel()
+
 		var errs []error
-		if err := removePathWithRetry(ctx, e.Path); err != nil {
+		if err := removePathWithRetry(rmCtx, e.Path); err != nil {
 			logger.Warnf("failed to remove host misc state %s: %v", e.Path, err)
 			errs = append(errs, err)
 		}
-		if !e.BindWorkdir && e.Workdir != "" {
-			if err := removePathWithRetry(ctx, e.Workdir); err != nil {
+		if e.CleanWorkdir {
+			if err := removePathWithRetry(rmCtx, e.Workdir); err != nil {
 				logger.Warnf("failed to remove host workspace %s: %v", e.Workdir, err)
 				errs = append(errs, err)
 			}
 		}
-		return errors.Join(errs...)
+		for _, err := range errs {
+			if !errors.Is(err, context.DeadlineExceeded) {
+				return errors.Join(errs...)
+			}
+		}
+		// Teardown timed out; warned above. Do not fail job completion over it.
+		return nil
 	}
 }
 

act/container/host_environment_test.go

@@ -6,13 +6,16 @@ package container
 
 import (
 	"archive/tar"
+	"bytes"
 	"context"
 	"io"
 	"os"
 	"path"
 	"path/filepath"
 	"runtime"
+	"strings"
 	"testing"
+	"time"
 
 	"gitea.com/gitea/runner/act/common"
 
@@ -100,7 +103,46 @@ func TestHostEnvironmentExecExitCode(t *testing.T) {
 	assert.Equal(t, "Process completed with exit code 3.", err.Error())
 }
 
-func TestHostEnvironmentRemoveCleansWorkdir(t *testing.T) {
+func TestHostEnvironmentAllocatePTY(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("uses POSIX shell")
+	}
+	for _, tc := range []struct {
+		name     string
+		allocPTY bool
+		expect   string
+	}{
+		{name: "off", allocPTY: false, expect: "NOTTY"},
+		{name: "on", allocPTY: true, expect: "TTY"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			dir := t.TempDir()
+			buf := &bytes.Buffer{}
+			e := &HostEnvironment{
+				Path:        filepath.Join(dir, "path"),
+				TmpDir:      filepath.Join(dir, "tmp"),
+				ToolCache:   filepath.Join(dir, "tool_cache"),
+				ActPath:     filepath.Join(dir, "act_path"),
+				StdOut:      buf,
+				Workdir:     filepath.Join(dir, "path"),
+				AllocatePTY: tc.allocPTY,
+			}
+			for _, p := range []string{e.Path, e.TmpDir, e.ToolCache, e.ActPath} {
+				require.NoError(t, os.MkdirAll(p, 0o700))
+			}
+
+			err := e.Exec(
+				[]string{"sh", "-c", "[ -t 1 ] && printf TTY || printf NOTTY"},
+				map[string]string{"PATH": os.Getenv("PATH")}, "", "",
+			)(context.Background())
+			require.NoError(t, err)
+			got := strings.TrimSpace(strings.ReplaceAll(buf.String(), "\r", ""))
+			assert.Equal(t, tc.expect, got)
+		})
+	}
+}
+
+func TestHostEnvironmentRemovePreservesWorkdirByDefault(t *testing.T) {
 	logger := logrus.New()
 	ctx := common.WithLogger(context.Background(), logrus.NewEntry(logger))
 	base := t.TempDir()
@@ -111,9 +153,8 @@ func TestHostEnvironmentRemoveCleansWorkdir(t *testing.T) {
 	require.NoError(t, os.MkdirAll(workdir, 0o700))
 
 	e := &HostEnvironment{
-		Path:        path,
-		Workdir:     workdir,
-		BindWorkdir: false,
+		Path:    path,
+		Workdir: workdir,
 		CleanUp: func() {
 			_ = os.RemoveAll(miscRoot)
 		},
@@ -121,10 +162,10 @@ func TestHostEnvironmentRemoveCleansWorkdir(t *testing.T) {
 	}
 	require.NoError(t, e.Remove()(ctx))
 	_, err := os.Stat(workdir)
-	assert.ErrorIs(t, err, os.ErrNotExist)
+	require.NoError(t, err)
 }
 
-func TestHostEnvironmentRemoveSkipsWorkdirWhenBindWorkdir(t *testing.T) {
+func TestHostEnvironmentRemoveCleansWorkdirWhenOwned(t *testing.T) {
 	logger := logrus.New()
 	ctx := common.WithLogger(context.Background(), logrus.NewEntry(logger))
 	base := t.TempDir()
@@ -135,9 +176,9 @@ func TestHostEnvironmentRemoveSkipsWorkdirWhenBindWorkdir(t *testing.T) {
 	require.NoError(t, os.MkdirAll(workdir, 0o700))
 
 	e := &HostEnvironment{
-		Path:        path,
-		Workdir:     workdir,
-		BindWorkdir: true,
+		Path:         path,
+		Workdir:      workdir,
+		CleanWorkdir: true,
 		CleanUp: func() {
 			_ = os.RemoveAll(miscRoot)
 		},
@@ -145,5 +186,178 @@ func TestHostEnvironmentRemoveSkipsWorkdirWhenBindWorkdir(t *testing.T) {
 	}
 	require.NoError(t, e.Remove()(ctx))
 	_, err := os.Stat(workdir)
-	require.NoError(t, err)
+	assert.ErrorIs(t, err, os.ErrNotExist)
+}
+
+func TestRemoveAllWithContextDoesNotHangOnStuckDelete(t *testing.T) {
+	release := make(chan struct{})
+	stubDone := make(chan struct{})
+
+	orig := removeAll
+	removeAll = func(string) error {
+		defer close(stubDone)
+		<-release
+		return nil
+	}
+	// removeAllWithContext intentionally leaks the delete goroutine on timeout,
+	// and that goroutine still references removeAll. Unblock it and wait for it
+	// to return before restoring the var, so the restore can't race the read.
+	t.Cleanup(func() {
+		close(release)
+		<-stubDone
+		removeAll = orig
+	})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+
+	err := removeAllWithContext(ctx, t.TempDir())
+	require.ErrorIs(t, err, context.DeadlineExceeded)
+}
+
+// TestHostEnvironmentRemoveDoesNotHangOnStuckCleanUp guards against a stalled
+// CleanUp callback (e.g. an os.RemoveAll blocked by an AV/EDR filter driver or
+// an unresponsive mount) wedging the runner slot forever at "Cleaning up
+// container". Remove must time out the callback and complete job teardown.
+func TestHostEnvironmentRemoveDoesNotHangOnStuckCleanUp(t *testing.T) {
+	// Keep the suite fast: shrink the per-phase teardown timeout for this test.
+	orig := hostCleanupTimeout
+	hostCleanupTimeout = 100 * time.Millisecond
+	t.Cleanup(func() { hostCleanupTimeout = orig })
+
+	logger := logrus.New()
+	ctx := common.WithLogger(context.Background(), logrus.NewEntry(logger))
+	base := t.TempDir()
+	path := filepath.Join(base, "misc", "hostexecutor")
+	require.NoError(t, os.MkdirAll(path, 0o700))
+
+	release := make(chan struct{})
+	t.Cleanup(func() { close(release) }) // unblock the leaked goroutine at test end
+
+	e := &HostEnvironment{
+		Path: path,
+		CleanUp: func() {
+			<-release // simulate a delete syscall stuck indefinitely
+		},
+		StdOut: os.Stdout,
+	}
+
+	done := make(chan error, 1)
+	go func() { done <- e.Remove()(ctx) }()
+
+	select {
+	case err := <-done:
+		require.NoError(t, err)
+	case <-time.After(10 * time.Second):
+		t.Fatal("Remove() hung on a stuck CleanUp callback")
+	}
+}
+
+// TestHostEnvironmentRemoveDoesNotHangOnStuckPathRemoval guards against a
+// stalled os.RemoveAll on the misc/workspace paths (same AV/EDR wedge as
+// #1023) wedging job completion after the CleanUp callback has already timed
+// out or finished.
+func TestHostEnvironmentRemoveDoesNotHangOnStuckPathRemoval(t *testing.T) {
+	origTimeout := hostCleanupTimeout
+	hostCleanupTimeout = 100 * time.Millisecond
+	t.Cleanup(func() { hostCleanupTimeout = origTimeout })
+
+	release := make(chan struct{})
+	stubDone := make(chan struct{})
+
+	origRemoveAll := removeAll
+	removeAll = func(string) error {
+		defer close(stubDone)
+		<-release
+		return nil
+	}
+	// The stuck delete goroutine outlives the timed-out Remove and still reads
+	// removeAll; unblock it and wait before restoring to avoid a restore/read race.
+	t.Cleanup(func() {
+		close(release)
+		<-stubDone
+		removeAll = origRemoveAll
+	})
+
+	logger := logrus.New()
+	ctx := common.WithLogger(context.Background(), logrus.NewEntry(logger))
+	base := t.TempDir()
+	path := filepath.Join(base, "misc", "hostexecutor")
+	require.NoError(t, os.MkdirAll(path, 0o700))
+
+	e := &HostEnvironment{
+		Path:   path,
+		StdOut: os.Stdout,
+	}
+
+	done := make(chan error, 1)
+	go func() { done <- e.Remove()(ctx) }()
+
+	select {
+	case err := <-done:
+		require.NoError(t, err)
+	case <-time.After(10 * time.Second):
+		t.Fatal("Remove() hung on a stuck path removal")
+	}
+}
+
+func TestBuildWindowsWorkspaceKillScript(t *testing.T) {
+	t.Run("single dir", func(t *testing.T) {
+		s := buildWindowsWorkspaceKillScript([]string{`C:\workspace\job1`})
+		assert.Contains(t, s, `$paths = @('C:\workspace\job1')`)
+		// Self-PID guard is essential — without it the script could taskkill
+		// the PowerShell process running it.
+		assert.Contains(t, s, "$selfPid = $PID")
+		assert.Contains(t, s, "$_.ProcessId -eq $selfPid")
+		// Must match both ExecutablePath (binaries from the workspace) and
+		// CommandLine (system binaries invoked with workspace paths in args),
+		// both bounded by dir+separator so a name-prefix sibling is spared.
+		assert.Contains(t, s, `$prefix = $p + '\'`)
+		assert.Contains(t, s, "$_.ExecutablePath.StartsWith($prefix")
+		assert.Contains(t, s, "$_.CommandLine.IndexOf($prefix")
+		// Each matched PID must be tree-killed, not just stopped.
+		assert.Contains(t, s, "taskkill.exe /PID $_.ProcessId /T /F")
+	})
+
+	t.Run("multiple dirs comma-separated", func(t *testing.T) {
+		s := buildWindowsWorkspaceKillScript([]string{
+			`C:\work\path`,
+			`C:\work\workdir`,
+			`C:\Users\runner\AppData\Local\Temp\job-42`,
+		})
+		assert.Contains(t, s, `'C:\work\path'`)
+		assert.Contains(t, s, `'C:\work\workdir'`)
+		assert.Contains(t, s, `'C:\Users\runner\AppData\Local\Temp\job-42'`)
+		// Commas between entries — no trailing comma, no leading comma.
+		assert.Contains(t, s, `'C:\work\path','C:\work\workdir',`)
+	})
+
+	t.Run("path with single quote is escaped", func(t *testing.T) {
+		// In PowerShell single-quoted strings the only special char is the
+		// quote itself, escaped by doubling. A workspace path that ever
+		// contained `'` would inject a command into the script otherwise.
+		s := buildWindowsWorkspaceKillScript([]string{`C:\work\it's\path`})
+		assert.Contains(t, s, `'C:\work\it''s\path'`)
+		// And it must NOT appear unescaped — otherwise the quote would
+		// terminate the literal early.
+		assert.NotContains(t, s, `'C:\work\it's\path'`)
+	})
+
+	t.Run("path with wildcard metacharacters is matched literally", func(t *testing.T) {
+		// A path containing [ ] ? * must be embedded verbatim and matched with
+		// ordinal String methods, not -like, otherwise the metacharacters would
+		// be interpreted as wildcards and the leftover process could escape.
+		s := buildWindowsWorkspaceKillScript([]string{`C:\work\[job]?1`})
+		assert.Contains(t, s, `'C:\work\[job]?1'`)
+		assert.NotContains(t, s, "-like")
+		assert.Contains(t, s, "StartsWith")
+		assert.Contains(t, s, "IndexOf")
+	})
+
+	t.Run("empty dir list still produces a valid script", func(t *testing.T) {
+		s := buildWindowsWorkspaceKillScript(nil)
+		// Empty array literal — script runs, matches nothing, is a no-op.
+		assert.Contains(t, s, "$paths = @()")
+		assert.Contains(t, s, "Get-CimInstance Win32_Process")
+	})
 }

act/container/linux_container_environment_extensions.go

@@ -66,12 +66,15 @@ func (*LinuxContainerEnvironmentExtensions) JoinPathVariable(paths ...string) st
 	return strings.Join(paths, ":")
 }
 
+// DefaultToolCache is where the runner mounts the tool cache inside job containers.
+const DefaultToolCache = "/opt/hostedtoolcache"
+
 func (*LinuxContainerEnvironmentExtensions) GetRunnerContext(ctx context.Context) map[string]any {
 	return map[string]any{
 		"os":         "Linux",
 		"arch":       RunnerArch(ctx),
 		"temp":       "/tmp",
-		"tool_cache": "/opt/hostedtoolcache",
+		"tool_cache": DefaultToolCache,
 	}
 }
 

act/container/parse_env_file.go

@@ -13,6 +13,9 @@ import (
 	"strings"
 
 	"gitea.com/gitea/runner/act/common"
+
+	"golang.org/x/text/encoding/unicode"
+	"golang.org/x/text/transform"
 )
 
 func parseEnvFile(e Container, srcPath string, env *map[string]string) common.Executor {
@@ -28,9 +31,19 @@ func parseEnvFile(e Container, srcPath string, env *map[string]string) common.Ex
 		if err != nil && err != io.EOF {
 			return err
 		}
-		s := bufio.NewScanner(reader)
+		// Decode by BOM: Windows PowerShell 5.1 redirection writes UTF-16, and some
+		// tools emit a UTF-8 BOM. Without a BOM the file is read as UTF-8, as before.
+		decoded := transform.NewReader(reader, unicode.BOMOverride(unicode.UTF8.NewDecoder()))
+
+		s := bufio.NewScanner(decoded)
+		// Default 64 KiB max token size is too small for realistic env-file lines; allow up to 16 MiB.
+		s.Buffer(make([]byte, 0, 64*1024), 16*1024*1024)
 		for s.Scan() {
 			line := s.Text()
+			// GitHub's runner ignores blank lines
+			if strings.TrimSpace(line) == "" {
+				continue
+			}
 			singleLineEnv := strings.Index(line, "=")
 			multiLineEnv := strings.Index(line, "<<")
 			if singleLineEnv != -1 && (multiLineEnv == -1 || singleLineEnv < multiLineEnv) {
@@ -50,6 +63,9 @@ func parseEnvFile(e Container, srcPath string, env *map[string]string) common.Ex
 					}
 					multiLineEnvContent += content
 				}
+				if err := s.Err(); err != nil {
+					return fmt.Errorf("reading env file: %w", err)
+				}
 				if !delimiterFound {
 					return fmt.Errorf("invalid format delimiter '%v' not found before end of file", multiLineEnvDelimiter)
 				}
@@ -58,6 +74,9 @@ func parseEnvFile(e Container, srcPath string, env *map[string]string) common.Ex
 				return fmt.Errorf("invalid format '%v', expected a line with '=' or '<<'", line)
 			}
 		}
+		if err := s.Err(); err != nil {
+			return fmt.Errorf("reading env file: %w", err)
+		}
 		env = &localEnv
 		return nil
 	}

act/container/parse_env_file_test.go

@@ -0,0 +1,134 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"bufio"
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/encoding/unicode"
+)
+
+func newTestHostEnv(t *testing.T) (*HostEnvironment, string) {
+	t.Helper()
+	e := &HostEnvironment{Path: t.TempDir()}
+	return e, filepath.Join(e.Path, "envfile")
+}
+
+func TestParseEnvFileSingleLine(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	require.NoError(t, os.WriteFile(envPath, []byte("FOO=bar\nBAZ=qux\n"), 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, "bar", env["FOO"])
+	assert.Equal(t, "qux", env["BAZ"])
+}
+
+func TestParseEnvFileMultiLine(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	content := "FOO<<EOF\nline1\nline2\nEOF\n"
+	require.NoError(t, os.WriteFile(envPath, []byte(content), 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, "line1\nline2", env["FOO"])
+}
+
+func TestParseEnvFileLargeValueWithinLimit(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	big := strings.Repeat("x", 2*1024*1024)
+	content := "FOO<<EOF\n" + big + "\nEOF\n"
+	require.NoError(t, os.WriteFile(envPath, []byte(content), 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, big, env["FOO"])
+}
+
+func TestParseEnvFileLineExceedsBufferReportsScannerError(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	tooBig := strings.Repeat("x", 17*1024*1024) // over the 16 MiB cap
+	content := "FOO<<EOF\n" + tooBig + "\nEOF\n"
+	require.NoError(t, os.WriteFile(envPath, []byte(content), 0o600))
+
+	env := map[string]string{}
+	err := parseEnvFile(e, envPath, &env)(context.Background())
+	require.ErrorIs(t, err, bufio.ErrTooLong)
+	assert.Contains(t, err.Error(), "reading env file")
+}
+
+// Regression test: a blank line used to fail the job at "Complete Job", after
+// every step had already been recorded as successful.
+func TestParseEnvFileBlankLines(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	require.NoError(t, os.WriteFile(envPath, []byte("\nFOO=bar\n\n   \nBAZ=qux\n\n"), 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, "bar", env["FOO"])
+	assert.Equal(t, "qux", env["BAZ"])
+}
+
+// blank lines inside a heredoc value are content, not separators
+func TestParseEnvFileMultiLineKeepsBlankLines(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	require.NoError(t, os.WriteFile(envPath, []byte("FOO<<EOF\nline1\n\nline2\nEOF\n"), 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, "line1\n\nline2", env["FOO"])
+}
+
+func TestParseEnvFileUTF8BOM(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	content := append([]byte{0xEF, 0xBB, 0xBF}, []byte("FOO=bar\n")...)
+	require.NoError(t, os.WriteFile(envPath, content, 0o600))
+
+	env := map[string]string{}
+	require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+	assert.Equal(t, "bar", env["FOO"])
+}
+
+// Windows host mode: PowerShell 5.1 redirection writes UTF-16, which used to be
+// unrecognisable as KEY=VALUE, so the writes were silently ignored.
+func TestParseEnvFileUTF16(t *testing.T) {
+	tests := []struct {
+		name    string
+		encoder *encoding.Encoder
+	}{
+		{"little endian", unicode.UTF16(unicode.LittleEndian, unicode.UseBOM).NewEncoder()},
+		{"big endian", unicode.UTF16(unicode.BigEndian, unicode.UseBOM).NewEncoder()},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e, envPath := newTestHostEnv(t)
+			content, err := tt.encoder.Bytes([]byte("FOO=bar\r\nMULTI<<EOF\r\nline1\r\nEOF\r\n"))
+			require.NoError(t, err)
+			require.NoError(t, os.WriteFile(envPath, content, 0o600))
+
+			env := map[string]string{}
+			require.NoError(t, parseEnvFile(e, envPath, &env)(context.Background()))
+			assert.Equal(t, "bar", env["FOO"])
+			assert.Equal(t, "line1", env["MULTI"])
+		})
+	}
+}
+
+func TestParseEnvFileMissingDelimiter(t *testing.T) {
+	e, envPath := newTestHostEnv(t)
+	require.NoError(t, os.WriteFile(envPath, []byte("FOO<<EOF\nline1\nline2\n"), 0o600))
+
+	env := map[string]string{}
+	err := parseEnvFile(e, envPath, &env)(context.Background())
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "delimiter")
+}

act/container/util.go

@@ -8,23 +8,10 @@ package container
 
 import (
 	"os"
-	"syscall"
 
 	"github.com/creack/pty"
 )
 
-func getSysProcAttr(_ string, tty bool) *syscall.SysProcAttr {
-	if tty {
-		return &syscall.SysProcAttr{
-			Setsid:  true,
-			Setctty: true,
-		}
-	}
-	return &syscall.SysProcAttr{
-		Setpgid: true,
-	}
-}
-
 func openPty() (*os.File, *os.File, error) {
 	return pty.Open()
 }

act/container/util_openbsd_mips64.go

@@ -7,15 +7,8 @@ package container
 import (
 	"errors"
 	"os"
-	"syscall"
 )
 
-func getSysProcAttr(cmdLine string, tty bool) *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{
-		Setpgid: true,
-	}
-}
-
 func openPty() (*os.File, *os.File, error) {
 	return nil, nil, errors.New("Unsupported")
 }

act/container/util_plan9.go

@@ -7,15 +7,8 @@ package container
 import (
 	"errors"
 	"os"
-	"syscall"
 )
 
-func getSysProcAttr(cmdLine string, tty bool) *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{
-		Rfork: syscall.RFNOTEG,
-	}
-}
-
 func openPty() (*os.File, *os.File, error) {
 	return nil, nil, errors.New("Unsupported")
 }

act/container/util_windows.go

@@ -7,13 +7,8 @@ package container
 import (
 	"errors"
 	"os"
-	"syscall"
 )
 
-func getSysProcAttr(cmdLine string, tty bool) *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{CmdLine: cmdLine, CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP}
-}
-
 func openPty() (*os.File, *os.File, error) {
 	return nil, nil, errors.New("Unsupported")
 }

act/exprparser/functions.go

@@ -266,7 +266,7 @@ func (impl *interperterImpl) jobSuccess() (bool, error) { //nolint:unparam // pr
 	jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job())
 
 	for _, needs := range jobNeeds {
-		if jobs[needs].Result != "success" {
+		if jobs[needs].NeedsResult() != "success" {
 			return false, nil
 		}
 	}
@@ -274,8 +274,17 @@ func (impl *interperterImpl) jobSuccess() (bool, error) { //nolint:unparam // pr
 	return true, nil
 }
 
+// jobStatus returns the current job status, treating a nil Job context as an
+// empty status so status-check functions never panic on a nil dereference.
+func (impl *interperterImpl) jobStatus() string {
+	if impl.env.Job == nil {
+		return ""
+	}
+	return impl.env.Job.Status
+}
+
 func (impl *interperterImpl) stepSuccess() (bool, error) { //nolint:unparam // pre-existing issue from nektos/act
-	return impl.env.Job.Status == "success", nil
+	return impl.jobStatus() == "success", nil
 }
 
 func (impl *interperterImpl) jobFailure() (bool, error) { //nolint:unparam // pre-existing issue from nektos/act
@@ -283,7 +292,7 @@ func (impl *interperterImpl) jobFailure() (bool, error) { //nolint:unparam // pr
 	jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job())
 
 	for _, needs := range jobNeeds {
-		if jobs[needs].Result == "failure" {
+		if jobs[needs].NeedsResult() == "failure" {
 			return true, nil
 		}
 	}
@@ -292,9 +301,9 @@ func (impl *interperterImpl) jobFailure() (bool, error) { //nolint:unparam // pr
 }
 
 func (impl *interperterImpl) stepFailure() (bool, error) { //nolint:unparam // pre-existing issue from nektos/act
-	return impl.env.Job.Status == "failure", nil
+	return impl.jobStatus() == "failure", nil
 }
 
 func (impl *interperterImpl) cancelled() (bool, error) { //nolint:unparam // pre-existing issue from nektos/act
-	return impl.env.Job.Status == "cancelled", nil
+	return impl.jobStatus() == "cancelled", nil
 }

act/exprparser/functions_test.go

@@ -254,3 +254,27 @@ func TestFunctionFormat(t *testing.T) {
 		})
 	}
 }
+
+func TestStatusFunctionsNilJob(t *testing.T) {
+	// A nil Job context must not panic: the status-check functions should treat
+	// it as an empty status and return false rather than dereferencing nil.
+	env := &EvaluationEnvironment{}
+
+	table := []struct {
+		input   string
+		context string
+		name    string
+	}{
+		{"cancelled()", "job", "cancelled-nil-job"},
+		{"success()", "step", "step-success-nil-job"},
+		{"failure()", "step", "step-failure-nil-job"},
+	}
+
+	for _, tt := range table {
+		t.Run(tt.name, func(t *testing.T) {
+			output, err := NewInterpeter(env, Config{Context: tt.context}).Evaluate(tt.input, DefaultStatusCheckNone)
+			assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
+			assert.Equal(t, false, output)
+		})
+	}
+}

act/exprparser/interpreter.go

@@ -251,7 +251,7 @@ func (impl *interperterImpl) evaluateArrayDeref(arrayDerefNode *actionlint.Array
 
 func (impl *interperterImpl) getPropertyValue(left reflect.Value, property string) (value any, err error) {
 	switch left.Kind() {
-	case reflect.Ptr:
+	case reflect.Pointer:
 		return impl.getPropertyValue(left.Elem(), property)
 
 	case reflect.Struct:
@@ -321,7 +321,7 @@ func (impl *interperterImpl) getPropertyValue(left reflect.Value, property strin
 }
 
 func (impl *interperterImpl) getMapValue(value reflect.Value) (any, error) {
-	if value.Kind() == reflect.Ptr {
+	if value.Kind() == reflect.Pointer {
 		return impl.getMapValue(value.Elem())
 	}
 

act/exprparser/interpreter_test.go

@@ -11,6 +11,7 @@ import (
 	"gitea.com/gitea/runner/act/model"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestLiterals(t *testing.T) {
@@ -523,7 +524,9 @@ func TestOperatorsBooleanEvaluation(t *testing.T) {
 			assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
 
 			if expected, ok := tt.expected.(float64); ok && math.IsNaN(expected) {
-				assert.True(t, math.IsNaN(output.(float64)))
+				number, ok := output.(float64)
+				require.True(t, ok, "want a number, got %T", output)
+				assert.True(t, math.IsNaN(number))
 			} else {
 				assert.Equal(t, tt.expected, output)
 			}

act/filecollector/file_collector_test.go

@@ -13,6 +13,7 @@ import (
 	"runtime"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/go-git/go-billy/v5"
 	"github.com/go-git/go-billy/v5/memfs"
@@ -221,3 +222,63 @@ func TestCopyCollectorWriteFileOverwritesFileWithSymlink(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, "target", resolved)
 }
+
+func TestDefaultFsOpenReadlinkAndWalk(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("creating symlinks requires elevated privileges on Windows")
+	}
+
+	root := t.TempDir()
+	require.NoError(t, os.WriteFile(filepath.Join(root, "file.txt"), []byte("content"), 0o644))
+	require.NoError(t, os.Symlink("file.txt", filepath.Join(root, "link.txt")))
+
+	fsys := &DefaultFs{}
+	var walked []string
+	require.NoError(t, fsys.Walk(root, func(path string, info os.FileInfo, err error) error {
+		require.NoError(t, err)
+		walked = append(walked, info.Name())
+		return nil
+	}))
+	require.Contains(t, walked, "file.txt")
+	require.Contains(t, walked, "link.txt")
+
+	file, err := fsys.Open(filepath.Join(root, "file.txt"))
+	require.NoError(t, err)
+	data, err := io.ReadAll(file)
+	require.NoError(t, err)
+	require.NoError(t, file.Close())
+	require.Equal(t, "content", string(data))
+
+	link, err := fsys.Readlink(filepath.Join(root, "link.txt"))
+	require.NoError(t, err)
+	require.Equal(t, "file.txt", link)
+}
+
+func TestFileCollectorCancellationAndWalkError(t *testing.T) {
+	fc := &FileCollector{Fs: &memoryFs{Filesystem: memfs.New()}}
+	walk := fc.CollectFiles(cancelledContext(t), nil)
+
+	err := walk("file", fakeFileInfo{name: "file"}, nil)
+	require.EqualError(t, err, "copy cancelled")
+
+	err = walk("file", fakeFileInfo{name: "file"}, os.ErrPermission)
+	require.ErrorIs(t, err, os.ErrPermission)
+}
+
+func cancelledContext(t *testing.T) context.Context {
+	t.Helper()
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	return ctx
+}
+
+type fakeFileInfo struct {
+	name string
+}
+
+func (f fakeFileInfo) Name() string       { return f.name }
+func (f fakeFileInfo) Size() int64        { return 0 }
+func (f fakeFileInfo) Mode() os.FileMode  { return 0o644 }
+func (f fakeFileInfo) ModTime() time.Time { return time.Time{} }
+func (f fakeFileInfo) IsDir() bool        { return false }
+func (f fakeFileInfo) Sys() any           { return nil }

act/lookpath/env.go

@@ -4,18 +4,6 @@
 
 package lookpath
 
-import "os"
-
 type Env interface {
 	Getenv(name string) string
 }
-
-type defaultEnv struct{}
-
-func (*defaultEnv) Getenv(name string) string {
-	return os.Getenv(name)
-}
-
-func LookPath(file string) (string, error) {
-	return LookPath2(file, &defaultEnv{})
-}

act/lookpath/lp_unix_test.go

@@ -0,0 +1,74 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+
+package lookpath
+
+import (
+	"errors"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+type testEnv map[string]string
+
+func (e testEnv) Getenv(name string) string {
+	return e[name]
+}
+
+func TestLookPath2SearchesPathAndEmptyElement(t *testing.T) {
+	dir := t.TempDir()
+	exe := filepath.Join(dir, "tool")
+	if err := os.WriteFile(exe, []byte("#!/bin/sh\n"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := LookPath2("tool", testEnv{"PATH": string(filepath.ListSeparator) + dir})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != exe {
+		t.Fatalf("LookPath2() = %q, want %q", got, exe)
+	}
+}
+
+func TestLookPath2DirectPathDoesNotSearchPath(t *testing.T) {
+	dir := t.TempDir()
+	exe := filepath.Join(dir, "tool")
+	if err := os.WriteFile(exe, []byte("#!/bin/sh\n"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := LookPath2(exe, testEnv{"PATH": ""})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != exe {
+		t.Fatalf("LookPath2() = %q, want %q", got, exe)
+	}
+}
+
+func TestLookPath2ReportsPermissionAndNotFound(t *testing.T) {
+	dir := t.TempDir()
+	file := filepath.Join(dir, "not-executable")
+	if err := os.WriteFile(file, []byte("plain text"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	_, err := LookPath2(file, testEnv{"PATH": dir})
+	var pathErr *Error
+	if !errors.As(err, &pathErr) || !errors.Is(pathErr.Err, fs.ErrPermission) {
+		t.Fatalf("LookPath2(non-executable) error = %v, want fs.ErrPermission wrapped in *Error", err)
+	}
+	if pathErr.Error() != fs.ErrPermission.Error() {
+		t.Fatalf("Error() = %q, want %q", pathErr.Error(), fs.ErrPermission.Error())
+	}
+
+	_, err = LookPath2("missing", testEnv{"PATH": dir})
+	if !errors.As(err, &pathErr) || !errors.Is(pathErr.Err, ErrNotFound) {
+		t.Fatalf("LookPath2(missing) error = %v, want ErrNotFound wrapped in *Error", err)
+	}
+}

act/lookpath/lp_windows.go

@@ -62,7 +62,7 @@ func LookPath2(file string, lenv Env) (string, error) {
 	var exts []string
 	x := lenv.Getenv(`PATHEXT`)
 	if x != "" {
-		for _, e := range strings.Split(strings.ToLower(x), `;`) {
+		for e := range strings.SplitSeq(strings.ToLower(x), `;`) {
 			if e == "" {
 				continue
 			}

act/model/action.go

@@ -76,17 +76,19 @@ func (a ActionRunsUsing) IsComposite() bool {
 
 // ActionRuns are a field in Action
 type ActionRuns struct {
-	Using      ActionRunsUsing   `yaml:"using"`
-	Env        map[string]string `yaml:"env"`
-	Main       string            `yaml:"main"`
-	Pre        string            `yaml:"pre"`
-	PreIf      string            `yaml:"pre-if"`
-	Post       string            `yaml:"post"`
-	PostIf     string            `yaml:"post-if"`
-	Image      string            `yaml:"image"`
-	Entrypoint string            `yaml:"entrypoint"`
-	Args       []string          `yaml:"args"`
-	Steps      []Step            `yaml:"steps"`
+	Using          ActionRunsUsing   `yaml:"using"`
+	Env            map[string]string `yaml:"env"`
+	Main           string            `yaml:"main"`
+	Pre            string            `yaml:"pre"`
+	PreIf          string            `yaml:"pre-if"`
+	Post           string            `yaml:"post"`
+	PostIf         string            `yaml:"post-if"`
+	Image          string            `yaml:"image"`
+	PreEntrypoint  string            `yaml:"pre-entrypoint"`
+	Entrypoint     string            `yaml:"entrypoint"`
+	PostEntrypoint string            `yaml:"post-entrypoint"`
+	Args           []string          `yaml:"args"`
+	Steps          []Step            `yaml:"steps"`
 }
 
 // Action describes a metadata file for GitHub actions. The metadata filename must be either action.yml or action.yaml. The data in the metadata file defines the inputs, outputs and main entrypoint for your action.

act/model/action_test.go

@@ -0,0 +1,82 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package model
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestReadActionDefaultsAndCaseInsensitiveUsing(t *testing.T) {
+	action, err := ReadAction(strings.NewReader(`
+name: example
+runs:
+  using: NoDe24
+  main: dist/index.js
+`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if action.Runs.Using != ActionRunsUsingNode24 {
+		t.Fatalf("using = %q, want %q", action.Runs.Using, ActionRunsUsingNode24)
+	}
+	if action.Runs.PreIf != "always()" {
+		t.Fatalf("pre-if = %q, want always()", action.Runs.PreIf)
+	}
+	if action.Runs.PostIf != "always()" {
+		t.Fatalf("post-if = %q, want always()", action.Runs.PostIf)
+	}
+}
+
+func TestReadActionPreservesExplicitConditions(t *testing.T) {
+	action, err := ReadAction(strings.NewReader(`
+runs:
+  using: composite
+  pre-if: success()
+  post-if: failure()
+  steps:
+    - run: echo hello
+`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if action.Runs.PreIf != "success()" || action.Runs.PostIf != "failure()" {
+		t.Fatalf("conditions = %q/%q, want explicit values", action.Runs.PreIf, action.Runs.PostIf)
+	}
+	if !action.Runs.Using.IsComposite() || action.Runs.Using.IsDocker() || action.Runs.Using.IsNode() {
+		t.Fatalf("unexpected using predicates for %q", action.Runs.Using)
+	}
+}
+
+func TestReadActionRejectsUnknownUsing(t *testing.T) {
+	_, err := ReadAction(strings.NewReader(`
+runs:
+  using: node99
+`))
+	if err == nil {
+		t.Fatal("expected unknown runs.using to fail")
+	}
+	if !strings.Contains(err.Error(), "node99") {
+		t.Fatalf("error = %q, want invalid value", err)
+	}
+}
+
+func TestReadActionDockerEntrypoints(t *testing.T) {
+	action, err := ReadAction(strings.NewReader(`
+runs:
+  using: docker
+  image: Dockerfile
+  pre-entrypoint: pre.sh
+  post-entrypoint: post.sh
+`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if action.Runs.PreEntrypoint != "pre.sh" {
+		t.Fatalf("pre-entrypoint = %q, want pre.sh", action.Runs.PreEntrypoint)
+	}
+	if action.Runs.PostEntrypoint != "post.sh" {
+		t.Fatalf("post-entrypoint = %q, want post.sh", action.Runs.PostEntrypoint)
+	}
+}

act/model/planner_test.go

@@ -6,10 +6,12 @@ package model
 
 import (
 	"path/filepath"
+	"strings"
 	"testing"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type WorkflowPlanTest struct {
@@ -65,3 +67,133 @@ func TestWorkflow(t *testing.T) {
 	assert.NoError(t, err) //nolint:testifylint // pre-existing issue from nektos/act
 	assert.NotNil(t, result)
 }
+
+func TestNewSingleWorkflowPlannerAndPlanMethods(t *testing.T) {
+	planner, err := NewSingleWorkflowPlanner("ci.yml", strings.NewReader(`
+name: CI
+on: [push, pull_request]
+jobs:
+  build:
+    name: Build project
+    runs-on: ubuntu-latest
+    steps:
+      - run: make build
+  test:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - run: make test
+`))
+	require.NoError(t, err)
+
+	assert.Equal(t, []string{"pull_request", "push"}, planner.GetEvents())
+
+	eventPlan, err := planner.PlanEvent("push")
+	require.NoError(t, err)
+	require.Len(t, eventPlan.Stages, 2)
+	assert.Equal(t, []string{"build"}, eventPlan.Stages[0].GetJobIDs())
+	assert.Equal(t, []string{"test"}, eventPlan.Stages[1].GetJobIDs())
+	assert.Equal(t, len("Build project"), eventPlan.MaxRunNameLen())
+	assert.Equal(t, "Build project", eventPlan.Stages[0].Runs[0].String())
+	assert.Equal(t, "build", eventPlan.Stages[0].Runs[0].JobID)
+	assert.NotNil(t, eventPlan.Stages[0].Runs[0].Job())
+
+	jobPlan, err := planner.PlanJob("test")
+	require.NoError(t, err)
+	require.Len(t, jobPlan.Stages, 2)
+	assert.Equal(t, []string{"build"}, jobPlan.Stages[0].GetJobIDs())
+	assert.Equal(t, []string{"test"}, jobPlan.Stages[1].GetJobIDs())
+
+	allPlan, err := planner.PlanAll()
+	require.NoError(t, err)
+	require.Len(t, allPlan.Stages, 2)
+	assert.Equal(t, []string{"build"}, allPlan.Stages[0].GetJobIDs())
+	assert.Equal(t, []string{"test"}, allPlan.Stages[1].GetJobIDs())
+}
+
+func TestCombineWorkflowPlannerMergesWorkflowStages(t *testing.T) {
+	first := mustReadWorkflow(t, `
+name: First
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - run: make build
+`)
+	second := mustReadWorkflow(t, `
+name: Second
+on: push
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - run: make lint
+  test:
+    needs: lint
+    runs-on: ubuntu-latest
+    steps:
+      - run: make test
+`)
+
+	planner := CombineWorkflowPlanner(first, second)
+	plan, err := planner.PlanEvent("push")
+	require.NoError(t, err)
+	require.Len(t, plan.Stages, 2)
+	assert.ElementsMatch(t, []string{"build", "lint"}, plan.Stages[0].GetJobIDs())
+	assert.Equal(t, []string{"test"}, plan.Stages[1].GetJobIDs())
+
+	empty, err := planner.PlanEvent("schedule")
+	require.NoError(t, err)
+	assert.Empty(t, empty.Stages)
+}
+
+func TestPlannerErrorsForMissingAndCyclicJobs(t *testing.T) {
+	workflow := mustReadWorkflow(t, `
+name: Cyclic
+on: push
+jobs:
+  a:
+    needs: b
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo a
+  b:
+    needs: a
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo b
+`)
+	planner := CombineWorkflowPlanner(workflow)
+
+	plan, err := planner.PlanJob("missing")
+	require.Error(t, err)
+	assert.Empty(t, plan.Stages)
+	assert.Contains(t, err.Error(), "Could not find any stages")
+
+	plan, err = planner.PlanEvent("push")
+	require.Error(t, err)
+	assert.Empty(t, plan.Stages)
+	assert.Contains(t, err.Error(), "unable to build dependency graph")
+}
+
+func TestNewSingleWorkflowPlannerErrors(t *testing.T) {
+	_, err := NewSingleWorkflowPlanner("empty.yml", strings.NewReader(""))
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "file is empty")
+
+	_, err = NewSingleWorkflowPlanner("invalid.yml", strings.NewReader("jobs: ["))
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "workflow is not valid")
+}
+
+func mustReadWorkflow(t *testing.T, content string) *Workflow {
+	t.Helper()
+
+	workflow, err := ReadWorkflow(strings.NewReader(content))
+	require.NoError(t, err)
+	if workflow.Name == "" {
+		workflow.Name = "workflow"
+	}
+	return workflow
+}

act/model/workflow.go

@@ -86,11 +86,12 @@ func (w *Workflow) OnSchedule() []string {
 	case []any:
 		allSchedules := []string{}
 		for _, v := range val {
-			for k, cron := range v.(map[string]any) {
-				if k != "cron" {
-					continue
-				}
-				allSchedules = append(allSchedules, cron.(string))
+			entry, ok := v.(map[string]any)
+			if !ok {
+				continue
+			}
+			if cron, ok := entry["cron"].(string); ok {
+				allSchedules = append(allSchedules, cron)
 			}
 		}
 		return allSchedules
@@ -190,23 +191,52 @@ func (w *Workflow) WorkflowCallConfig() *WorkflowCall {
 
 // Job is the structure of one job in a workflow
 type Job struct {
-	Name           string                    `yaml:"name"`
-	RawNeeds       yaml.Node                 `yaml:"needs"`
-	RawRunsOn      yaml.Node                 `yaml:"runs-on"`
-	Env            yaml.Node                 `yaml:"env"`
-	If             yaml.Node                 `yaml:"if"`
-	Steps          []*Step                   `yaml:"steps"`
-	TimeoutMinutes string                    `yaml:"timeout-minutes"`
-	Services       map[string]*ContainerSpec `yaml:"services"`
-	Strategy       *Strategy                 `yaml:"strategy"`
-	RawContainer   yaml.Node                 `yaml:"container"`
-	Defaults       Defaults                  `yaml:"defaults"`
-	Outputs        map[string]string         `yaml:"outputs"`
-	Uses           string                    `yaml:"uses"`
-	With           map[string]any            `yaml:"with"`
-	RawSecrets     yaml.Node                 `yaml:"secrets"`
-	RawPermissions yaml.Node                 `yaml:"permissions"`
-	Result         string
+	Name               string                    `yaml:"name"`
+	RawNeeds           yaml.Node                 `yaml:"needs"`
+	RawRunsOn          yaml.Node                 `yaml:"runs-on"`
+	Env                yaml.Node                 `yaml:"env"`
+	If                 yaml.Node                 `yaml:"if"`
+	Steps              []*Step                   `yaml:"steps"`
+	TimeoutMinutes     string                    `yaml:"timeout-minutes"`
+	RawContinueOnError string                    `yaml:"continue-on-error"`
+	Services           map[string]*ContainerSpec `yaml:"services"`
+	Strategy           *Strategy                 `yaml:"strategy"`
+	RawContainer       yaml.Node                 `yaml:"container"`
+	Defaults           Defaults                  `yaml:"defaults"`
+	Outputs            map[string]string         `yaml:"outputs"`
+	Uses               string                    `yaml:"uses"`
+	With               map[string]any            `yaml:"with"`
+	RawSecrets         yaml.Node                 `yaml:"secrets"`
+	RawPermissions     yaml.Node                 `yaml:"permissions"`
+	Result             string
+	// Runtime fields set during execution (not from YAML):
+	ContinueOnError bool // true when all failing matrix combinations had continue-on-error=true
+	hasFirmFailure  bool // true once any combination failed without continue-on-error
+}
+
+// SetContinueOnError records whether this combination's failure should not fail the workflow.
+// Must be called under the job lock. Safe across parallel matrix combinations.
+func (j *Job) SetContinueOnError(continueOnErr bool) {
+	if continueOnErr {
+		if !j.hasFirmFailure {
+			j.ContinueOnError = true
+		}
+	} else {
+		j.hasFirmFailure = true
+		j.ContinueOnError = false
+	}
+}
+
+// NeedsResult returns the job result as seen by dependent jobs through the
+// `needs` context. A job that failed but was tolerated via continue-on-error
+// reports "success" to its dependents, matching GitHub: such a failure must not
+// block jobs gated on the default `if: success()`, even though the overall
+// workflow run is still marked as failed.
+func (j *Job) NeedsResult() string {
+	if j.Result == "failure" && j.ContinueOnError {
+		return "success"
+	}
+	return j.Result
 }
 
 // Strategy for the job
@@ -325,14 +355,20 @@ func (j *Job) Needs() []string {
 
 // RunsOn list for Job
 func (j *Job) RunsOn() []string {
-	switch j.RawRunsOn.Kind {
+	return RunsOnFromNode(j.RawRunsOn)
+}
+
+// RunsOnFromNode parses the runs-on labels from a raw runs-on node, so callers can evaluate a
+// copy of the node (avoiding mutation of the shared Job) before reading the labels.
+func RunsOnFromNode(rawRunsOn yaml.Node) []string {
+	switch rawRunsOn.Kind {
 	case yaml.MappingNode:
 		var val struct {
 			Group  string
 			Labels yaml.Node
 		}
 
-		if !decodeNode(j.RawRunsOn, &val) {
+		if !decodeNode(rawRunsOn, &val) {
 			return nil
 		}
 
@@ -344,7 +380,7 @@ func (j *Job) RunsOn() []string {
 
 		return labels
 	default:
-		return nodeAsStringSlice(j.RawRunsOn)
+		return nodeAsStringSlice(rawRunsOn)
 	}
 }
 
@@ -408,9 +444,9 @@ func normalizeMatrixValue(key string, val any) ([]any, error) {
 // Scalar values are wrapped into single-element arrays automatically.
 // Template expressions are resolved by EvaluateYamlNode before this method is
 // called; if unresolved, the literal string is wrapped as a one-element fallback.
-func (j *Job) Matrix() map[string][]any {
+func (j *Job) Matrix() (map[string][]any, error) {
 	if j.Strategy == nil || j.Strategy.RawMatrix.Kind != yaml.MappingNode {
-		return nil
+		return map[string][]any{}, nil
 	}
 
 	// Decode to flexible map first so that scalar values don't cause a type error.
@@ -420,9 +456,9 @@ func (j *Job) Matrix() map[string][]any {
 		// Fall back to the strict array-only format for backward compatibility.
 		var val map[string][]any
 		if !decodeNode(j.Strategy.RawMatrix, &val) {
-			return nil
+			return map[string][]any{}, nil
 		}
-		return val
+		return val, nil
 	}
 
 	// Convert flexible format to expected format with validation
@@ -430,12 +466,11 @@ func (j *Job) Matrix() map[string][]any {
 	for k, v := range flexVal {
 		normalized, err := normalizeMatrixValue(k, v)
 		if err != nil {
-			log.Errorf("matrix validation error: %v", err)
-			return nil
+			return nil, err
 		}
 		val[k] = normalized
 	}
-	return val
+	return val, nil
 }
 
 // GetMatrixes returns the matrix cross product
@@ -447,38 +482,38 @@ func (j *Job) GetMatrixes() ([]map[string]any, error) {
 		j.Strategy.FailFast = j.Strategy.GetFailFast()
 		j.Strategy.MaxParallel = j.Strategy.GetMaxParallel()
 
-		if m := j.Matrix(); m != nil {
+		m, err := j.Matrix()
+		if err != nil {
+			return nil, err
+		}
+		if len(m) > 0 {
 			includes := make([]map[string]any, 0)
 			extraIncludes := make([]map[string]any, 0)
+			addInclude := func(raw any) error {
+				include, ok := raw.(map[string]any)
+				if !ok {
+					return fmt.Errorf("the workflow is not valid. Matrix include %v is not a map of matrix keys to values", raw)
+				}
+				for k := range include {
+					if _, ok := m[k]; ok {
+						includes = append(includes, include)
+						return nil
+					}
+				}
+				extraIncludes = append(extraIncludes, include)
+				return nil
+			}
 			for _, v := range m["include"] {
 				switch t := v.(type) {
 				case []any:
 					for _, i := range t {
-						i := i.(map[string]any)
-						extraInclude := true
-						for k := range i {
-							if _, ok := m[k]; ok {
-								includes = append(includes, i)
-								extraInclude = false
-								break
-							}
-						}
-						if extraInclude {
-							extraIncludes = append(extraIncludes, i)
+						if err := addInclude(i); err != nil {
+							return nil, err
 						}
 					}
 				case any:
-					v := v.(map[string]any)
-					extraInclude := true
-					for k := range v {
-						if _, ok := m[k]; ok {
-							includes = append(includes, v)
-							extraInclude = false
-							break
-						}
-					}
-					if extraInclude {
-						extraIncludes = append(extraIncludes, v)
+					if err := addInclude(t); err != nil {
+						return nil, err
 					}
 				}
 			}
@@ -486,10 +521,13 @@ func (j *Job) GetMatrixes() ([]map[string]any, error) {
 
 			excludes := make([]map[string]any, 0)
 			for _, e := range m["exclude"] {
-				e := e.(map[string]any)
-				for k := range e {
+				exclude, ok := e.(map[string]any)
+				if !ok {
+					return nil, fmt.Errorf("the workflow is not valid. Matrix exclude %v is not a map of matrix keys to values", e)
+				}
+				for k := range exclude {
 					if _, ok := m[k]; ok {
-						excludes = append(excludes, e)
+						excludes = append(excludes, exclude)
 					} else {
 						// We fail completely here because that's what GitHub does for non-existing matrix keys, fail on exclude, silent skip on include
 						return nil, fmt.Errorf("the workflow is not valid. Matrix exclude key %q does not match any key within the matrix", k)
@@ -645,6 +683,33 @@ type Step struct {
 	TimeoutMinutes     string            `yaml:"timeout-minutes"`
 }
 
+// Clone returns a deep copy safe to mutate independently of s. Job steps are shared across
+// parallel matrix runs, which mutate per-job fields (ID, Number, Shell) and evaluate the If/Env
+// yaml.Nodes in place, so each job must own its copy.
+func (s *Step) Clone() *Step {
+	clone := *s
+	clone.If = CloneYamlNode(s.If)
+	clone.Env = CloneYamlNode(s.Env)
+	clone.With = maps.Clone(s.With)
+	return &clone
+}
+
+// CloneYamlNode returns a deep copy of a yaml.Node so callers can evaluate it in place without
+// mutating a node shared across parallel jobs.
+func CloneYamlNode(n yaml.Node) yaml.Node {
+	clone := n
+	if n.Content != nil {
+		clone.Content = make([]*yaml.Node, len(n.Content))
+		for i, child := range n.Content {
+			if child != nil {
+				childClone := CloneYamlNode(*child)
+				clone.Content[i] = &childClone
+			}
+		}
+	}
+	return clone
+}
+
 // String gets the name of step
 func (s *Step) String() string {
 	if s.Name != "" {

act/model/workflow_test.go

@@ -5,13 +5,244 @@
 package model
 
 import (
+	"fmt"
 	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"go.yaml.in/yaml/v4"
 )
 
+// TestStepCloneIsolatesMutableFields guards the parallel-matrix race fix: combinations share the
+// job's *Step, and Clone() must hand each a copy whose If/Env nodes and With map can be mutated
+// independently. A shallow copy would share Env.Content's backing array (and the With map) and
+// leak writes across combinations.
+func TestStepCloneIsolatesMutableFields(t *testing.T) {
+	var orig Step
+	require.NoError(t, yaml.Unmarshal([]byte("if: ${{ env.X == 'a' }}\nenv:\n  KEY: original\nwith:\n  arg: original\n"), &orig))
+	require.Len(t, orig.Env.Content, 2) // [key, value]
+
+	clone := orig.Clone()
+	clone.If.Value = "changed"
+	clone.Env.Content[1].Value = "changed"
+	clone.With["arg"] = "changed"
+
+	assert.Equal(t, "${{ env.X == 'a' }}", orig.If.Value, "If must not be shared with the clone")
+	assert.Equal(t, "original", orig.Env.Content[1].Value, "Env nodes must not be shared with the clone")
+	assert.Equal(t, "original", orig.With["arg"], "With map must not be shared with the clone")
+}
+
+// TestJobNeedsResult guards the continue-on-error semantics exposed to dependent
+// jobs through the `needs` context: a failed-but-tolerated job reports "success"
+// so it does not block dependents gated on the default `if: success()`, matching
+// GitHub. A firm failure and any non-failure result are reported verbatim.
+func TestJobNeedsResult(t *testing.T) {
+	cases := []struct {
+		name            string
+		result          string
+		continueOnError bool
+		want            string
+	}{
+		{"tolerated failure reports success", "failure", true, "success"},
+		{"firm failure reports failure", "failure", false, "failure"},
+		{"success is unchanged", "success", false, "success"},
+		{"success with continue-on-error is unchanged", "success", true, "success"},
+		{"empty result is unchanged", "", true, ""},
+		{"skipped is unchanged", "skipped", true, "skipped"},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			j := &Job{Result: tc.result, ContinueOnError: tc.continueOnError}
+			assert.Equal(t, tc.want, j.NeedsResult())
+		})
+	}
+}
+
+func TestJobSetContinueOnErrorFirmFailureWins(t *testing.T) {
+	job := &Job{}
+	job.SetContinueOnError(true)
+	assert.True(t, job.ContinueOnError)
+
+	job.SetContinueOnError(false)
+	assert.False(t, job.ContinueOnError)
+
+	job.SetContinueOnError(true)
+	assert.False(t, job.ContinueOnError, "a later tolerated failure must not hide an earlier firm failure")
+}
+
+func TestStepStatusText(t *testing.T) {
+	for _, tc := range []struct {
+		status stepStatus
+		text   string
+	}{
+		{StepStatusSuccess, "success"},
+		{StepStatusFailure, "failure"},
+		{StepStatusSkipped, "skipped"},
+	} {
+		t.Run(tc.text, func(t *testing.T) {
+			got, err := tc.status.MarshalText()
+			require.NoError(t, err)
+			assert.Equal(t, tc.text, string(got))
+
+			var parsed stepStatus
+			require.NoError(t, parsed.UnmarshalText(got))
+			assert.Equal(t, tc.status, parsed)
+			assert.Equal(t, tc.text, parsed.String())
+		})
+	}
+
+	var parsed stepStatus
+	require.Error(t, parsed.UnmarshalText([]byte("cancelled")))
+	assert.Empty(t, stepStatus(99).String())
+}
+
+func TestWorkflowCallConfig(t *testing.T) {
+	workflow, err := ReadWorkflow(strings.NewReader(`
+on:
+  workflow_call:
+    inputs:
+      name:
+        required: true
+        type: string
+    outputs:
+      digest:
+        value: ${{ jobs.build.outputs.digest }}
+jobs: {}
+`))
+	require.NoError(t, err)
+
+	config := workflow.WorkflowCallConfig()
+	require.NotNil(t, config)
+	require.Contains(t, config.Inputs, "name")
+	assert.True(t, config.Inputs["name"].Required)
+	assert.Equal(t, "string", config.Inputs["name"].Type)
+	assert.Equal(t, "${{ jobs.build.outputs.digest }}", config.Outputs["digest"].Value)
+
+	listWorkflow, err := ReadWorkflow(strings.NewReader("on: [workflow_call]\njobs: {}\n"))
+	require.NoError(t, err)
+	assert.NotNil(t, listWorkflow.WorkflowCallConfig())
+	assert.Empty(t, listWorkflow.WorkflowCallConfig().Inputs)
+}
+
+func TestJobSecretsAndEnvironment(t *testing.T) {
+	inheritJob := readJob(t, `
+secrets: inherit
+env:
+  A: one
+  B: two
+`)
+	assert.True(t, inheritJob.InheritSecrets())
+	assert.Nil(t, inheritJob.Secrets())
+	assert.Equal(t, map[string]string{"A": "one", "B": "two"}, inheritJob.Environment())
+
+	mappingJob := readJob(t, `
+secrets:
+  TOKEN: ${{ secrets.TOKEN }}
+`)
+	assert.False(t, mappingJob.InheritSecrets())
+	assert.Equal(t, map[string]string{"TOKEN": "${{ secrets.TOKEN }}"}, mappingJob.Secrets())
+}
+
+func TestJobTypeAndString(t *testing.T) {
+	tests := []struct {
+		job     Job
+		want    JobType
+		wantErr bool
+	}{
+		{job: Job{}, want: JobTypeDefault},
+		{job: Job{Uses: "./.github/workflows/reuse.yml"}, want: JobTypeReusableWorkflowLocal},
+		{job: Job{Uses: "owner/repo/.github/workflows/reuse.yaml@v1"}, want: JobTypeReusableWorkflowRemote},
+		{job: Job{Uses: "owner/repo/.github/workflows/reuse.yaml"}, want: JobTypeInvalid, wantErr: true},
+	}
+
+	for _, tc := range tests {
+		t.Run(fmt.Sprintf("%s/%s", tc.job.Uses, tc.want), func(t *testing.T) {
+			got, err := tc.job.Type()
+			if tc.wantErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+			assert.Equal(t, tc.want, got)
+		})
+	}
+
+	assert.Equal(t, "default", JobTypeDefault.String())
+	assert.Equal(t, "local-reusable-workflow", JobTypeReusableWorkflowLocal.String())
+	assert.Equal(t, "remote-reusable-workflow", JobTypeReusableWorkflowRemote.String())
+	assert.Equal(t, "unknown", JobType(99).String())
+}
+
+func TestStepStringEnvironmentEnvAndType(t *testing.T) {
+	step := readStep(t, `
+id: example
+env:
+  DIRECT: value
+with:
+  mixed-key: input
+`)
+	assert.Equal(t, "example", step.String())
+	assert.Equal(t, map[string]string{"DIRECT": "value"}, step.Environment())
+	assert.Equal(t, map[string]string{"DIRECT": "value", "INPUT_MIXED-KEY": "input"}, step.GetEnv())
+
+	for _, tc := range []struct {
+		step Step
+		want StepType
+	}{
+		{step: Step{}, want: StepTypeInvalid},
+		{step: Step{Run: "echo hi"}, want: StepTypeRun},
+		{step: Step{Run: "echo hi", Uses: "actions/checkout@v4"}, want: StepTypeInvalid},
+		{step: Step{Uses: "docker://alpine:latest"}, want: StepTypeUsesDockerURL},
+		{step: Step{Uses: "./.github/workflows/reuse.yml"}, want: StepTypeReusableWorkflowLocal},
+		{step: Step{Uses: "owner/repo/.github/workflows/reuse.yml@v1"}, want: StepTypeReusableWorkflowRemote},
+		{step: Step{Uses: "./actions/local"}, want: StepTypeUsesActionLocal},
+		{step: Step{Uses: "actions/checkout@v4"}, want: StepTypeUsesActionRemote},
+	} {
+		t.Run(tc.want.String(), func(t *testing.T) {
+			assert.Equal(t, tc.want, tc.step.Type())
+		})
+	}
+
+	assert.Equal(t, "invalid", StepTypeInvalid.String())
+	assert.Equal(t, "run", StepTypeRun.String())
+	assert.Equal(t, "local-action", StepTypeUsesActionLocal.String())
+	assert.Equal(t, "remote-action", StepTypeUsesActionRemote.String())
+	assert.Equal(t, "docker", StepTypeUsesDockerURL.String())
+	assert.Equal(t, "local-reusable-workflow", StepTypeReusableWorkflowLocal.String())
+	assert.Equal(t, "remote-reusable-workflow", StepTypeReusableWorkflowRemote.String())
+	assert.Equal(t, "unknown", StepType(99).String())
+	assert.NotEmpty(t, (&Step{Uses: "actions/checkout@v4"}).UsesHash())
+}
+
+func TestWorkflowGetJobAndIDs(t *testing.T) {
+	workflow := &Workflow{Jobs: map[string]*Job{"build": {}}}
+	assert.Equal(t, []string{"build"}, workflow.GetJobIDs())
+
+	job := workflow.GetJob("build")
+	require.NotNil(t, job)
+	assert.Equal(t, "build", job.Name)
+	assert.Equal(t, "success()", job.If.Value)
+	assert.Nil(t, workflow.GetJob("missing"))
+}
+
+func TestRawConcurrencyYaml(t *testing.T) {
+	var expr RawConcurrency
+	require.NoError(t, yaml.Unmarshal([]byte("group-${{ github.ref }}"), &expr))
+	assert.Equal(t, "group-${{ github.ref }}", expr.RawExpression)
+	marshaled, err := expr.MarshalYAML()
+	require.NoError(t, err)
+	assert.Equal(t, "group-${{ github.ref }}", marshaled)
+
+	var object RawConcurrency
+	require.NoError(t, yaml.Unmarshal([]byte("group: ci\ncancel-in-progress: true\n"), &object))
+	assert.Equal(t, "ci", object.Group)
+	assert.Equal(t, "true", object.CancelInProgress)
+	marshaled, err = object.MarshalYAML()
+	require.NoError(t, err)
+	assert.Equal(t, (*objectConcurrency)(&object), marshaled)
+}
+
 func TestReadWorkflow_ScheduleEvent(t *testing.T) {
 	yaml := `
 name: local-action-docker-url
@@ -436,7 +667,9 @@ func TestReadWorkflow_Strategy(t *testing.T) {
 	matrixes, err := job.GetMatrixes()
 	assert.NoError(t, err)                          //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, matrixes, []map[string]any{{}}) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.Equal(t, job.Matrix(), map[string][]any(nil))
+	matrix, err := job.Matrix()
+	require.NoError(t, err)
+	assert.Empty(t, matrix)
 	assert.Equal(t, job.Strategy.MaxParallel, 2) //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, job.Strategy.FailFast, true) //nolint:testifylint // pre-existing issue from nektos/act
 
@@ -444,7 +677,9 @@ func TestReadWorkflow_Strategy(t *testing.T) {
 	matrixes, err = job.GetMatrixes()
 	assert.NoError(t, err)                          //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, matrixes, []map[string]any{{}}) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.Equal(t, job.Matrix(), map[string][]any(nil))
+	matrix, err = job.Matrix()
+	require.NoError(t, err)
+	assert.Empty(t, matrix)
 	assert.Equal(t, job.Strategy.MaxParallel, 4)  //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, job.Strategy.FailFast, false) //nolint:testifylint // pre-existing issue from nektos/act
 
@@ -452,7 +687,9 @@ func TestReadWorkflow_Strategy(t *testing.T) {
 	matrixes, err = job.GetMatrixes()
 	assert.NoError(t, err)                          //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, matrixes, []map[string]any{{}}) //nolint:testifylint // pre-existing issue from nektos/act
-	assert.Equal(t, job.Matrix(), map[string][]any(nil))
+	matrix, err = job.Matrix()
+	require.NoError(t, err)
+	assert.Empty(t, matrix)
 	assert.Equal(t, job.Strategy.MaxParallel, 2)  //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(t, job.Strategy.FailFast, false) //nolint:testifylint // pre-existing issue from nektos/act
 
@@ -469,7 +706,9 @@ func TestReadWorkflow_Strategy(t *testing.T) {
 			{"datacenter": "site-b", "node-version": "12.x", "site": "dev"},
 		},
 	)
-	assert.Equal(t, job.Matrix(), //nolint:testifylint // pre-existing issue from nektos/act
+	matrix, err = job.Matrix()
+	require.NoError(t, err)
+	assert.Equal(t, matrix, //nolint:testifylint // pre-existing issue from nektos/act
 		map[string][]any{
 			"datacenter": {"site-c", "site-d"},
 			"exclude": {
@@ -861,13 +1100,15 @@ jobs:
 				t.Fatal("job not found")
 			}
 
-			matrix := job.Matrix()
+			matrix, err := job.Matrix()
 
 			if tt.wantErr {
+				require.Error(t, err)
 				assert.Nil(t, matrix, "matrix should be nil on error")
 			} else {
+				require.NoError(t, err)
 				if tt.wantLen == 0 {
-					assert.Nil(t, matrix, "matrix should be nil for jobs without strategy")
+					assert.Empty(t, matrix, "no matrix for jobs without strategy")
 				} else {
 					assert.NotNil(t, matrix, "matrix should not be nil")
 					assert.Len(t, matrix, tt.wantLen, "matrix should have expected number of keys")
@@ -899,10 +1140,24 @@ func TestJobMatrixValidation(t *testing.T) {
 			},
 		}
 
-		// Attempt to get matrix
-		matrix := job.Matrix()
-
-		// Should return nil due to validation error
-		assert.Nil(t, matrix, "matrix with nested map should return nil")
+		matrix, err := job.Matrix()
+		require.ErrorContains(t, err, `matrix key "config" has invalid nested object value`)
+		assert.Nil(t, matrix)
 	})
 }
+
+func readJob(t *testing.T, content string) *Job {
+	t.Helper()
+
+	var job Job
+	require.NoError(t, yaml.Unmarshal([]byte(content), &job))
+	return &job
+}
+
+func readStep(t *testing.T, content string) *Step {
+	t.Helper()
+
+	var step Step
+	require.NoError(t, yaml.Unmarshal([]byte(content), &step))
+	return &step
+}

act/runner/action.go

@@ -6,7 +6,9 @@ package runner
 
 import (
 	"context"
+	"crypto/sha256"
 	"embed"
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"io"
@@ -127,6 +129,16 @@ func readActionImpl(ctx context.Context, step *model.Step, actionDir, actionPath
 	return action, err
 }
 
+// cachedActionTar returns the action's tree from the action cache, which only a remote action
+// has an entry in.
+func cachedActionTar(ctx context.Context, step actionStep, name, includePrefix string) (io.ReadCloser, error) {
+	remote, ok := step.(*stepActionRemote)
+	if !ok {
+		return nil, fmt.Errorf("action %q is a remote action but runs as %T", name, step)
+	}
+	return step.getRunContext().Config.ActionCache.GetTarArchive(ctx, remote.cacheDir, remote.resolvedSha, includePrefix)
+}
+
 func maybeCopyToActionDir(ctx context.Context, step actionStep, actionDir, actionPath, containerActionDir string) error {
 	logger := common.Logger(ctx)
 	rc := step.getRunContext()
@@ -145,8 +157,7 @@ func maybeCopyToActionDir(ctx context.Context, step actionStep, actionDir, actio
 	}
 
 	if rc.Config != nil && rc.Config.ActionCache != nil {
-		raction := step.(*stepActionRemote)
-		ta, err := rc.Config.ActionCache.GetTarArchive(ctx, raction.cacheDir, raction.resolvedSha, "")
+		ta, err := cachedActionTar(ctx, step, stepModel.Uses, "")
 		if err != nil {
 			return err
 		}
@@ -205,7 +216,7 @@ func runActionImpl(step actionStep, actionDir string, remoteAction *remoteAction
 			if remoteAction == nil {
 				location = containerActionDir
 			}
-			return execAsDocker(ctx, step, actionName, actionDir, location, remoteAction == nil)
+			return execAsDocker(ctx, step, actionName, actionDir, location, remoteAction == nil, stepStageMain)
 		case x.IsComposite():
 			if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
 				return err
@@ -272,8 +283,38 @@ func removeGitIgnore(ctx context.Context, directory string) error {
 	return nil
 }
 
+// dockerActionImageTag derives the local docker image tag used when an action
+// is built from a Dockerfile.
+//
+// For Gitea: a local action (`uses: ./` or `uses: ./path`) has an actionName
+// that is the workspace-relative path of the action. That path is identical
+// across repositories (e.g. "./" for a self-referencing action), so without
+// namespacing, every repository's local docker action would build and reuse the
+// same `act-dockeraction:latest` image on a shared docker daemon. A subsequent
+// repository would then silently run the image built for an earlier one.
+// Including the repository keeps the tag stable for caching within a repository
+// while preventing cross-repository collisions.
+// See https://gitea.com/gitea/runner/issues/1039.
+func dockerActionImageTag(repository, actionName string, localAction bool) string {
+	name := actionName
+	if localAction {
+		name = path.Join(repository, actionName)
+	}
+	// The human-readable name is sanitized by collapsing every non-alphanumeric character to "-".
+	sanitized := regexp.MustCompile("[^a-zA-Z0-9]").ReplaceAllString(name, "-")
+	if localAction {
+		// For local actions a short hash of the raw repository and action path is appended so the tag stays unique per repository.
+		sum := sha256.Sum256([]byte(repository + "\x00" + actionName))
+		sanitized += "-" + hex.EncodeToString(sum[:])[:12]
+	}
+	// "-dockeraction" ensures that "./", "./test " won't get converted to "act-:latest", "act-test-:latest" which are invalid docker image names
+	image := fmt.Sprintf("%s-dockeraction:%s", sanitized, "latest")
+	image = "act-" + strings.TrimLeft(image, "-")
+	return strings.ToLower(image)
+}
+
 // TODO: break out parts of function to reduce complexicity
-func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, basedir string, localAction bool) error {
+func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, basedir string, localAction bool, stage stepStage) error {
 	logger := common.Logger(ctx)
 	rc := step.getRunContext()
 	action := step.getActionModel()
@@ -286,10 +327,7 @@ func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, b
 		// Apply forcePull only for prebuild docker images
 		forcePull = rc.Config.ForcePull
 	} else {
-		// "-dockeraction" enshures that "./", "./test " won't get converted to "act-:latest", "act-test-:latest" which are invalid docker image names
-		image = fmt.Sprintf("%s-dockeraction:%s", regexp.MustCompile("[^a-zA-Z0-9]").ReplaceAllString(actionName, "-"), "latest")
-		image = "act-" + strings.TrimLeft(image, "-")
-		image = strings.ToLower(image)
+		image = dockerActionImageTag(step.getGithubContext(ctx).Repository, actionName, localAction)
 		contextDir, fileName := filepath.Split(filepath.Join(basedir, action.Runs.Image))
 
 		anyArchExists, err := ContainerImageExistsLocally(ctx, image, "any")
@@ -322,8 +360,7 @@ func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, b
 				}
 				defer buildContext.Close()
 			} else if rc.Config.ActionCache != nil {
-				rstep := step.(*stepActionRemote)
-				buildContext, err = rc.Config.ActionCache.GetTarArchive(ctx, rstep.cacheDir, rstep.resolvedSha, contextDir)
+				buildContext, err = cachedActionTar(ctx, step, actionName, contextDir)
 				if err != nil {
 					return err
 				}
@@ -335,6 +372,7 @@ func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, b
 				ImageTag:     image,
 				BuildContext: buildContext,
 				Platform:     rc.Config.ContainerArchitecture,
+				BuildArgs:    rc.proxyBuildArgs(),
 			})
 			if buildContext == nil {
 				// Held across the whole build: the daemon drains contextDir lazily.
@@ -357,16 +395,9 @@ func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, b
 		cmd = action.Runs.Args
 		evalDockerArgs(ctx, step, action, &cmd)
 	}
-	entrypoint := strings.Fields(eval.Interpolate(ctx, step.getStepModel().With["entrypoint"]))
-	if len(entrypoint) == 0 {
-		if action.Runs.Entrypoint != "" {
-			entrypoint, err = shellquote.Split(action.Runs.Entrypoint)
-			if err != nil {
-				return err
-			}
-		} else {
-			entrypoint = nil
-		}
+	entrypoint, err := dockerEntrypoint(ctx, step, eval, stage)
+	if err != nil {
+		return err
 	}
 	stepContainer := newStepContainer(ctx, step, image, cmd, entrypoint)
 	return common.NewPipelineExecutor(
@@ -376,10 +407,34 @@ func execAsDocker(ctx context.Context, step actionStep, actionName, actionDir, b
 		stepContainer.Create(rc.Config.ContainerCapAdd, rc.Config.ContainerCapDrop),
 		stepContainer.Start(true),
 	).Finally(
-		stepContainer.Remove().IfBool(!rc.Config.ReuseContainers),
+		stepContainer.Remove().IfBool(!rc.Config.ReuseContainers && !rc.Config.AutoRemove),
 	).Finally(stepContainer.Close())(ctx)
 }
 
+// dockerEntrypoint returns the entrypoint the action's image runs with for the given
+// stage. Only the main stage honours the `entrypoint` input.
+func dockerEntrypoint(ctx context.Context, step actionStep, eval ExpressionEvaluator, stage stepStage) ([]string, error) {
+	runs := step.getActionModel().Runs
+
+	var entrypoint string
+	switch stage {
+	case stepStagePre:
+		entrypoint = runs.PreEntrypoint
+	case stepStagePost:
+		entrypoint = runs.PostEntrypoint
+	default:
+		if fields := strings.Fields(eval.Interpolate(ctx, step.getStepModel().With["entrypoint"])); len(fields) > 0 {
+			return fields, nil
+		}
+		entrypoint = runs.Entrypoint
+	}
+
+	if entrypoint == "" {
+		return nil, nil
+	}
+	return shellquote.Split(entrypoint)
+}
+
 func evalDockerArgs(ctx context.Context, step step, action *model.Action, cmd *[]string) {
 	rc := step.getRunContext()
 	stepModel := step.getStepModel()
@@ -426,23 +481,18 @@ func newStepContainer(ctx context.Context, step step, image string, cmd, entrypo
 		envList = append(envList, fmt.Sprintf("%s=%s", k, v))
 	}
 
-	envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TOOL_CACHE", "/opt/hostedtoolcache"))
-	envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_OS", "Linux"))
-	envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_ARCH", container.RunnerArch(ctx)))
-	envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TEMP", "/tmp"))
+	envList = append(envList, rc.runnerEnv(ctx)...)
 
 	binds, mounts := rc.GetBindsAndMounts()
 	networkMode := "container:" + rc.jobContainerName()
 	if rc.IsHostEnv(ctx) {
 		networkMode = "default"
 	}
-	stepContainer := container.NewContainer(&container.NewContainerInput{
+	stepContainer := ContainerNewContainer(&container.NewContainerInput{
 		Cmd:          cmd,
 		Entrypoint:   entrypoint,
 		WorkingDir:   rc.JobContainer.ToContainerPath(rc.Config.Workdir),
 		Image:        image,
-		Username:     rc.Config.Secrets["DOCKER_USERNAME"],
-		Password:     rc.Config.Secrets["DOCKER_PASSWORD"],
 		Name:         createContainerName(rc.jobContainerName(), "STEP-"+stepModel.ID),
 		Env:          envList,
 		Mounts:       mounts,
@@ -455,7 +505,8 @@ func newStepContainer(ctx context.Context, step step, image string, cmd, entrypo
 		Platform:     rc.Config.ContainerArchitecture,
 		Options:      rc.Config.ContainerOptions,
 		AutoRemove:   rc.Config.AutoRemove,
-		ValidVolumes: rc.Config.ValidVolumes,
+		ValidVolumes: rc.validVolumes(),
+		AllocatePTY:  rc.Config.AllocatePTY,
 	})
 	return stepContainer
 }
@@ -531,44 +582,57 @@ func hasPreStep(step actionStep) common.Conditional {
 		return action.Runs.Using.IsComposite() ||
 			(action.Runs.Using.IsNode() &&
 				action.Runs.Pre != "") ||
+			(action.Runs.Using.IsDocker() &&
+				action.Runs.PreEntrypoint != "") ||
 			(action.Runs.Using == model.ActionRunsUsingGo &&
 				action.Runs.Pre != "")
 	}
 }
 
+// actionStagePaths resolves where a step's action lives and where the job container sees
+// it, for the pre and post stage.
+func actionStagePaths(step actionStep) (actionDir, actionPath, actionName, containerActionDir string) {
+	rc := step.getRunContext()
+	stepModel := step.getStepModel()
+
+	if sar, ok := step.(*stepActionRemote); ok {
+		actionDir = sar.actionDir()
+		actionPath = newRemoteAction(stepModel.Uses).Path
+	} else {
+		actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
+	}
+
+	actionName, containerActionDir = getContainerActionPaths(stepModel, path.Join(actionDir, actionPath), rc)
+	return actionDir, actionPath, actionName, containerActionDir
+}
+
+// execDockerActionStage runs a docker action's image for its pre or post stage.
+func execDockerActionStage(ctx context.Context, step actionStep, stage stepStage) error {
+	actionDir, actionPath, actionName, containerActionDir := actionStagePaths(step)
+
+	_, remote := step.(*stepActionRemote)
+	location := containerActionDir
+	if remote {
+		location = path.Join(actionDir, actionPath)
+	}
+	return execAsDocker(ctx, step, actionName, actionDir, location, !remote, stage)
+}
+
 func runPreStep(step actionStep) common.Executor {
 	return func(ctx context.Context) error {
 		logger := common.Logger(ctx)
 		logger.Debugf("run pre step for '%s'", step.getStepModel())
 
 		rc := step.getRunContext()
-		stepModel := step.getStepModel()
 		action := step.getActionModel()
 
+		actionDir, actionPath, _, containerActionDir := actionStagePaths(step)
+
 		x := action.Runs.Using
 		switch {
 		case x.IsNode():
 			// defaults in pre steps were missing, however provided inputs are available
 			populateEnvsFromInput(ctx, step.getEnv(), action, rc)
-			// todo: refactor into step
-			var actionDir string
-			var actionPath string
-			if _, ok := step.(*stepActionRemote); ok {
-				actionPath = newRemoteAction(stepModel.Uses).Path
-				actionDir = fmt.Sprintf("%s/%s", rc.ActionCacheDir(), stepModel.UsesHash())
-			} else {
-				actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
-				actionPath = ""
-			}
-
-			var actionLocation string
-			if actionPath != "" {
-				actionLocation = path.Join(actionDir, actionPath)
-			} else {
-				actionLocation = actionDir
-			}
-
-			_, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
 
 			if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
 				return err
@@ -581,6 +645,12 @@ func runPreStep(step actionStep) common.Executor {
 
 			return rc.execJobContainer(containerArgs, *step.getEnv(), "", "")(ctx)
 
+		case x.IsDocker():
+			// defaults in pre steps were missing, however provided inputs are available
+			populateEnvsFromInput(ctx, step.getEnv(), action, rc)
+
+			return execDockerActionStage(ctx, step, stepStagePre)
+
 		case x.IsComposite():
 			if step.getCompositeSteps() == nil {
 				step.getCompositeRunContext(ctx)
@@ -594,25 +664,6 @@ func runPreStep(step actionStep) common.Executor {
 		case x == model.ActionRunsUsingGo:
 			// defaults in pre steps were missing, however provided inputs are available
 			populateEnvsFromInput(ctx, step.getEnv(), action, rc)
-			// todo: refactor into step
-			var actionDir string
-			var actionPath string
-			if _, ok := step.(*stepActionRemote); ok {
-				actionPath = newRemoteAction(stepModel.Uses).Path
-				actionDir = fmt.Sprintf("%s/%s", rc.ActionCacheDir(), stepModel.UsesHash())
-			} else {
-				actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
-				actionPath = ""
-			}
-
-			var actionLocation string
-			if actionPath != "" {
-				actionLocation = path.Join(actionDir, actionPath)
-			} else {
-				actionLocation = actionDir
-			}
-
-			_, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
 
 			if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
 				return err
@@ -665,6 +716,8 @@ func hasPostStep(step actionStep) common.Conditional {
 		return action.Runs.Using.IsComposite() ||
 			(action.Runs.Using.IsNode() &&
 				action.Runs.Post != "") ||
+			(action.Runs.Using.IsDocker() &&
+				action.Runs.PostEntrypoint != "") ||
 			(action.Runs.Using == model.ActionRunsUsingGo &&
 				action.Runs.Post != "")
 	}
@@ -676,28 +729,9 @@ func runPostStep(step actionStep) common.Executor {
 		logger.Debugf("run post step for '%s'", step.getStepModel())
 
 		rc := step.getRunContext()
-		stepModel := step.getStepModel()
 		action := step.getActionModel()
 
-		// todo: refactor into step
-		var actionDir string
-		var actionPath string
-		if _, ok := step.(*stepActionRemote); ok {
-			actionPath = newRemoteAction(stepModel.Uses).Path
-			actionDir = fmt.Sprintf("%s/%s", rc.ActionCacheDir(), stepModel.UsesHash())
-		} else {
-			actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
-			actionPath = ""
-		}
-
-		var actionLocation string
-		if actionPath != "" {
-			actionLocation = path.Join(actionDir, actionPath)
-		} else {
-			actionLocation = actionDir
-		}
-
-		_, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
+		actionDir, actionPath, _, containerActionDir := actionStagePaths(step)
 
 		x := action.Runs.Using
 		switch {
@@ -712,6 +746,11 @@ func runPostStep(step actionStep) common.Executor {
 
 			return rc.execJobContainer(containerArgs, *step.getEnv(), "", "")(ctx)
 
+		case x.IsDocker():
+			populateEnvsFromSavedState(step.getEnv(), step, rc)
+
+			return execDockerActionStage(ctx, step, stepStagePost)
+
 		case x.IsComposite():
 			if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
 				return err

act/runner/action_cache_offline_mode.go

@@ -1,45 +0,0 @@
-// Copyright 2024 The Gitea Authors. All rights reserved.
-// Copyright 2024 The nektos/act Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package runner
-
-import (
-	"context"
-	"io"
-	"path"
-
-	git "github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/plumbing"
-)
-
-type GoGitActionCacheOfflineMode struct {
-	Parent GoGitActionCache
-}
-
-func (c GoGitActionCacheOfflineMode) Fetch(ctx context.Context, cacheDir, url, ref, token string) (string, error) {
-	sha, fetchErr := c.Parent.Fetch(ctx, cacheDir, url, ref, token)
-	gitPath := path.Join(c.Parent.Path, safeFilename(cacheDir)+".git")
-	gogitrepo, err := git.PlainOpen(gitPath)
-	if err != nil {
-		return "", fetchErr
-	}
-	refName := plumbing.ReferenceName("refs/action-cache-offline/" + ref)
-	r, err := gogitrepo.Reference(refName, true)
-	if fetchErr == nil {
-		if err != nil || sha != r.Hash().String() {
-			if err == nil {
-				refName = r.Name()
-			}
-			ref := plumbing.NewHashReference(refName, plumbing.NewHash(sha))
-			_ = gogitrepo.Storer.SetReference(ref)
-		}
-	} else if err == nil {
-		return r.Hash().String(), nil
-	}
-	return sha, fetchErr
-}
-
-func (c GoGitActionCacheOfflineMode) GetTarArchive(ctx context.Context, cacheDir, sha, includePrefix string) (io.ReadCloser, error) {
-	return c.Parent.GetTarArchive(ctx, cacheDir, sha, includePrefix)
-}

act/runner/action_cache_test.go

@@ -8,64 +8,139 @@ import (
 	"archive/tar"
 	"bytes"
 	"context"
+	"fmt"
 	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 	"testing"
+	"time"
+
+	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/model"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
-func TestActionCache(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
+func runGit(t *testing.T, dir string, args ...string) {
+	t.Helper()
+	if dir != "" {
+		args = append([]string{"-C", dir}, args...)
 	}
+	cmd := exec.Command("git", args...)
+	// Fixed identity and host-config isolation so commits succeed offline regardless of the
+	// host's git config (mirrors gitCmd in act/common/git).
+	cmd.Env = append(os.Environ(),
+		"GIT_AUTHOR_NAME=test", "GIT_AUTHOR_EMAIL=test@example.com",
+		"GIT_COMMITTER_NAME=test", "GIT_COMMITTER_EMAIL=test@example.com",
+		"GIT_CONFIG_GLOBAL=/dev/null", "GIT_CONFIG_SYSTEM=/dev/null",
+	)
+	out, err := cmd.CombinedOutput()
+	require.NoError(t, err, string(out))
+}
+
+// TestShortShaActionRejected verifies a `uses` ref that is a shortened commit SHA is rejected
+// with a clear error. The action is resolved from a local repo (via DefaultActionInstance) so
+// this runs offline.
+func TestShortShaActionRejected(t *testing.T) {
+	// a local "remote" action repo at <root>/actions/hello-world-docker-action
+	actionRoot := t.TempDir()
+	repo := filepath.Join(actionRoot, "actions", "hello-world-docker-action")
+	require.NoError(t, os.MkdirAll(repo, 0o755))
+	runGit(t, "", "init", "--initial-branch=main", repo)
+	require.NoError(t, os.WriteFile(filepath.Join(repo, "action.yml"),
+		[]byte("name: hello\nruns:\n  using: node24\n  main: index.js\n"), 0o644))
+	runGit(t, repo, "add", ".")
+	runGit(t, repo, "commit", "-m", "initial")
+	out, err := exec.Command("git", "-C", repo, "rev-parse", "HEAD").Output()
+	require.NoError(t, err)
+	shortSha := strings.TrimSpace(string(out))[:7]
+
+	// a workflow that uses the action at the short SHA
+	wfDir := filepath.Join(t.TempDir(), "wf")
+	require.NoError(t, os.MkdirAll(wfDir, 0o755))
+	wf := fmt.Sprintf("on: push\njobs:\n  test:\n    runs-on: ubuntu-latest\n    steps:\n      - uses: actions/hello-world-docker-action@%s\n", shortSha)
+	require.NoError(t, os.WriteFile(filepath.Join(wfDir, "push.yml"), []byte(wf), 0o644))
+
+	runner, err := New(&Config{
+		Workdir:               wfDir,
+		EventName:             "push",
+		Platforms:             map[string]string{"ubuntu-latest": baseImage},
+		GitHubInstance:        "github.com",
+		DefaultActionInstance: actionRoot,
+		ContainerMaxLifetime:  time.Hour,
+	})
+	require.NoError(t, err)
+	planner, err := model.NewWorkflowPlanner(wfDir, true)
+	require.NoError(t, err)
+	plan, err := planner.PlanEvent("push")
+	require.NoError(t, err)
+
+	err = runner.NewPlanExecutor(plan)(common.WithDryrun(context.Background(), true))
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "shortened version of a commit SHA")
+}
+
+func TestActionCache(t *testing.T) {
 	a := assert.New(t)
+	ctx := context.Background()
+
+	// Build a local bare repo with a `js` action dir so this runs offline (formerly cloned
+	// github.com/nektos/act-test-actions over the network). allowAnySHA1InWant lets the
+	// "Fetch Sha" case fetch a commit hash directly.
+	remoteDir := t.TempDir()
+	runGit(t, "", "init", "--bare", "--initial-branch=main", remoteDir)
+	runGit(t, remoteDir, "config", "uploadpack.allowAnySHA1InWant", "true")
+
+	workDir := t.TempDir()
+	runGit(t, "", "clone", remoteDir, workDir)
+	require.NoError(t, os.MkdirAll(filepath.Join(workDir, "js"), 0o755))
+	require.NoError(t, os.WriteFile(filepath.Join(workDir, "js", "action.yml"),
+		[]byte("name: js\nruns:\n  using: node24\n  main: index.js\n"), 0o644))
+	require.NoError(t, os.WriteFile(filepath.Join(workDir, "js", "index.js"),
+		[]byte("console.log('hello');\n"), 0o644))
+	runGit(t, workDir, "add", ".")
+	runGit(t, workDir, "commit", "-m", "initial")
+	runGit(t, workDir, "push", "-u", "origin", "main")
+
+	out, err := exec.Command("git", "-C", workDir, "rev-parse", "main").Output()
+	require.NoError(t, err)
+	fullSha := strings.TrimSpace(string(out))
+
 	cache := &GoGitActionCache{
 		Path: t.TempDir(),
 	}
-	ctx := context.Background()
-	cacheDir := "nektos/act-test-actions"
-	repo := "https://github.com/nektos/act-test-actions"
+	cacheDir := "local/act-test-actions"
 	refs := []struct {
-		Name     string
-		CacheDir string
-		Repo     string
-		Ref      string
+		Name string
+		Ref  string
 	}{
-		{
-			Name:     "Fetch Branch Name",
-			CacheDir: cacheDir,
-			Repo:     repo,
-			Ref:      "main",
-		},
-		{
-			Name:     "Fetch Branch Name Absolutely",
-			CacheDir: cacheDir,
-			Repo:     repo,
-			Ref:      "refs/heads/main",
-		},
-		{
-			Name:     "Fetch HEAD",
-			CacheDir: cacheDir,
-			Repo:     repo,
-			Ref:      "HEAD",
-		},
-		{
-			Name:     "Fetch Sha",
-			CacheDir: cacheDir,
-			Repo:     repo,
-			Ref:      "de984ca37e4df4cb9fd9256435a3b82c4a2662b1",
-		},
+		{Name: "Fetch Branch Name", Ref: "main"},
+		{Name: "Fetch Branch Name Absolutely", Ref: "refs/heads/main"},
+		{Name: "Fetch HEAD", Ref: "HEAD"},
+		{Name: "Fetch Sha", Ref: fullSha},
 	}
 	for _, c := range refs {
 		t.Run(c.Name, func(t *testing.T) {
-			sha, err := cache.Fetch(ctx, c.CacheDir, c.Repo, c.Ref, "")
+			sha, err := cache.Fetch(ctx, cacheDir, remoteDir, c.Ref, "")
 			if !a.NoError(err) || !a.NotEmpty(sha) { //nolint:testifylint // pre-existing issue from nektos/act
 				return
 			}
-			atar, err := cache.GetTarArchive(ctx, c.CacheDir, sha, "js")
-			if !a.NoError(err) || !a.NotEmpty(atar) { //nolint:testifylint // pre-existing issue from nektos/act
+			atar, err := cache.GetTarArchive(ctx, cacheDir, sha, "js")
+			// NotNil, not NotEmpty: atar is a live io.PipeReader whose producer goroutine is
+			// writing concurrently; NotEmpty deep-reflects over its internals and races.
+			if !a.NoError(err) || !a.NotNil(atar) { //nolint:testifylint // pre-existing issue from nektos/act
 				return
 			}
+			// GetTarArchive streams from a background goroutine walking the shared repo.
+			// Drain and close so it finishes before the next subtest fetches into the same
+			// repo; otherwise the lingering walk races with that fetch.
+			defer func() {
+				_, _ = io.Copy(io.Discard, atar)
+				_ = atar.Close()
+			}()
 			mytar := tar.NewReader(atar)
 			th, err := mytar.Next()
 			if !a.NoError(err) || !a.NotEqual(0, th.Size) { //nolint:testifylint // pre-existing issue from nektos/act

act/runner/action_composite.go

@@ -8,6 +8,7 @@ import (
 	"context"
 	"errors"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -85,6 +86,19 @@ func newCompositeRunContext(ctx context.Context, parent *RunContext, step action
 	return compositerc
 }
 
+// appendUniqueMasks appends the masks from src to dst, skipping any mask that
+// is already present in dst. This prevents the parent RunContext's Masks slice
+// from growing exponentially when composite actions are nested or repeated,
+// since each composite RunContext is seeded with its parent's masks.
+func appendUniqueMasks(dst, src []string) []string {
+	for _, m := range src {
+		if !slices.Contains(dst, m) {
+			dst = append(dst, m)
+		}
+	}
+	return dst
+}
+
 func execAsComposite(step actionStep) common.Executor {
 	rc := step.getRunContext()
 	action := step.getActionModel()
@@ -110,7 +124,11 @@ func execAsComposite(step actionStep) common.Executor {
 			}, eval.Interpolate(ctx, output.Value))
 		}
 
-		rc.Masks = append(rc.Masks, compositeRC.Masks...)
+		// compositeRC.Masks is seeded with rc.Masks (see newCompositeRunContext)
+		// and may have additional masks appended while the composite action runs.
+		// Only append masks that are not already present, otherwise nested or
+		// repeated composite actions grow rc.Masks exponentially.
+		rc.Masks = appendUniqueMasks(rc.Masks, compositeRC.Masks)
 		rc.ExtraPath = compositeRC.ExtraPath
 		// compositeRC.Env is dirty, contains INPUT_ and merged step env, only rely on compositeRC.GlobalEnv
 		mergeIntoMap := mergeIntoMapCaseSensitive

act/runner/action_composite_test.go

@@ -0,0 +1,70 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAppendUniqueMasks(t *testing.T) {
+	tests := []struct {
+		name string
+		dst  []string
+		src  []string
+		want []string
+	}{
+		{
+			name: "appends new masks",
+			dst:  []string{"a"},
+			src:  []string{"b", "c"},
+			want: []string{"a", "b", "c"},
+		},
+		{
+			name: "skips masks already present",
+			dst:  []string{"a", "b"},
+			src:  []string{"a", "b"},
+			want: []string{"a", "b"},
+		},
+		{
+			name: "deduplicates within src",
+			dst:  []string{"a"},
+			src:  []string{"b", "b", "a"},
+			want: []string{"a", "b"},
+		},
+		{
+			name: "empty src leaves dst unchanged",
+			dst:  []string{"a"},
+			src:  nil,
+			want: []string{"a"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, appendUniqueMasks(tt.dst, tt.src))
+		})
+	}
+}
+
+// TestAppendUniqueMasksNoExponentialGrowth reproduces the exponential growth of
+// the parent's Masks slice observed with nested/repeated composite actions. A
+// composite RunContext is seeded with its parent's masks and the whole seeded
+// slice was previously appended back into the parent, doubling its length on
+// every composite action.
+func TestAppendUniqueMasksNoExponentialGrowth(t *testing.T) {
+	parentMasks := []string{"secret"}
+
+	for range 20 {
+		// compositeRC.Masks starts as a copy of the parent's masks (it is
+		// seeded with parent.Masks in newCompositeRunContext).
+		compositeMasks := make([]string, len(parentMasks))
+		copy(compositeMasks, parentMasks)
+
+		parentMasks = appendUniqueMasks(parentMasks, compositeMasks)
+	}
+
+	assert.Equal(t, []string{"secret"}, parentMasks)
+}

act/runner/action_test.go

@@ -20,6 +20,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
 )
 
 type closerMock struct {
@@ -150,6 +151,44 @@ runs:
 	}
 }
 
+// With AutoRemove the daemon reaps the container on exit, so act must not remove it afterwards.
+func TestExecAsDockerAutoRemove(t *testing.T) {
+	orig := ContainerNewContainer
+	defer func() { ContainerNewContainer = orig }()
+
+	for _, tc := range []struct {
+		autoRemove bool
+		removes    int
+	}{
+		{false, 2}, // stale + post-run
+		{true, 1},  // post-run skipped
+	} {
+		cm := &containerMock{}
+		ContainerNewContainer = func(*container.NewContainerInput) container.ExecutionsEnvironment { return cm }
+
+		step := &stepActionRemote{
+			Step: &model.Step{ID: "1", Uses: "org/action@v1"},
+			RunContext: &RunContext{
+				Config:       &Config{AutoRemove: tc.autoRemove},
+				Run:          &model.Run{JobID: "1", Workflow: &model.Workflow{Jobs: map[string]*model.Job{"1": {}}}},
+				JobContainer: cm,
+			},
+			action: &model.Action{Runs: model.ActionRuns{Using: "docker", Image: "docker://node:14"}},
+		}
+
+		removes := 0
+		cm.On("Pull", false).Return(func(context.Context) error { return nil })
+		cm.On("Remove").Return(func(context.Context) error { removes++; return nil })
+		cm.On("Create", []string(nil), []string(nil)).Return(func(context.Context) error { return nil })
+		cm.On("Start", true).Return(func(context.Context) error { return nil })
+		cm.On("Close").Return(func(context.Context) error { return nil })
+
+		require.NoError(t, execAsDocker(context.Background(), step, "action", t.TempDir(), t.TempDir(), false, stepStageMain))
+		cm.AssertExpectations(t)
+		assert.Equal(t, tc.removes, removes)
+	}
+}
+
 func TestActionRunner(t *testing.T) {
 	table := []struct {
 		name        string
@@ -258,6 +297,54 @@ func TestActionRunner(t *testing.T) {
 	}
 }
 
+func TestNewStepContainerDoesNotUseDockerSecrets(t *testing.T) {
+	cm := &containerMock{}
+
+	var captured *container.NewContainerInput
+	origContainerNewContainer := ContainerNewContainer
+	ContainerNewContainer = func(input *container.NewContainerInput) container.ExecutionsEnvironment {
+		captured = input
+		return cm
+	}
+	defer func() {
+		ContainerNewContainer = origContainerNewContainer
+	}()
+
+	ctx := context.Background()
+	rc := &RunContext{
+		Name: "job",
+		Config: &Config{
+			Secrets: map[string]string{
+				"DOCKER_USERNAME": "docker-user",
+				"DOCKER_PASSWORD": "docker-password",
+			},
+		},
+		Run: &model.Run{
+			JobID: "job",
+			Workflow: &model.Workflow{
+				Name: "test",
+				Jobs: map[string]*model.Job{
+					"job": {},
+				},
+			},
+		},
+		JobContainer: cm,
+		StepResults:  map[string]*model.StepResult{},
+	}
+	env := map[string]string{}
+	step := &stepMock{}
+	step.On("getRunContext").Return(rc)
+	step.On("getStepModel").Return(&model.Step{ID: "action"})
+	step.On("getEnv").Return(&env)
+
+	_ = newStepContainer(ctx, step, "registry.example.com/action:tag", nil, nil)
+
+	// DOCKER_USERNAME/DOCKER_PASSWORD should not be injected as pull credentials for docker action containers.
+	assert.Empty(t, captured.Username)
+	assert.Empty(t, captured.Password)
+	step.AssertExpectations(t)
+}
+
 func TestMaybeCopyToActionDirHoldsCloneLock(t *testing.T) {
 	ctx := context.Background()
 
@@ -378,7 +465,7 @@ func TestExecAsDockerHoldsCloneLockForRemoteUncached(t *testing.T) {
 	defer cancel()
 
 	done := make(chan error, 1)
-	go func() { done <- execAsDocker(ctx, step, "test-action", actionDir, actionDir, false) }()
+	go func() { done <- execAsDocker(ctx, step, "test-action", actionDir, actionDir, false, stepStageMain) }()
 
 	select {
 	case <-innerEntered:
@@ -407,3 +494,133 @@ func TestExecAsDockerHoldsCloneLockForRemoteUncached(t *testing.T) {
 		t.Fatal("execAsDocker did not return after inner was released and ctx was canceled")
 	}
 }
+
+func TestDockerActionImageTag(t *testing.T) {
+	// Remote actions already carry a unique, ref-scoped actionName (the uses
+	// hash), so the tag must be left untouched for backwards compatibility.
+	assert.Equal(t,
+		"act-abc123-dockeraction:latest",
+		dockerActionImageTag("owner/repo", "abc123", false),
+	)
+
+	// Local actions keep a human-readable, repository-namespaced prefix and gain a short hash suffix that makes the tag unique per (repository, actionName).
+	// See https://gitea.com/gitea/runner/issues/1039.
+	assert.Equal(t,
+		"act-owner-repo-baca2daaa2fe-dockeraction:latest",
+		dockerActionImageTag("owner/repo", "./", true),
+	)
+	assert.Equal(t,
+		"act-owner-repo-sub-e847b61255a8-dockeraction:latest",
+		dockerActionImageTag("owner/repo", "./sub", true),
+	)
+
+	// Sanitizing every non-alphanumeric character to "-" is lossy, so distinct inputs can collapse to the same readable prefix.
+	// The hash suffix must keep such cases apart, otherwise an image built for one repository is reused for another.
+	collisions := [][2]struct {
+		repoName   string
+		actionName string
+	}{
+		// Two different repositories, both `uses: ./`: "a/b-c" and "a-b/c" both sanitize to "a-b-c".
+		{{"a/b-c", "./"}, {"a-b/c", "./"}},
+		// A repository's root action vs another repository's sub-path action:
+		// "owner/repo-a" + "./" and "owner/repo" + "./a" both sanitize to "owner-repo-a".
+		{{"owner/repo-a", "./"}, {"owner/repo", "./a"}},
+	}
+	for _, c := range collisions {
+		assert.NotEqual(t,
+			dockerActionImageTag(c[0].repoName, c[0].actionName, true),
+			dockerActionImageTag(c[1].repoName, c[1].actionName, true),
+			"local docker action tags must differ for %q/%q vs %q/%q",
+			c[0].repoName, c[0].actionName, c[1].repoName, c[1].actionName,
+		)
+	}
+
+	// Distinct local actions within the same repository keep distinct tags.
+	assert.NotEqual(t,
+		dockerActionImageTag("owner/repo", "./", true),
+		dockerActionImageTag("owner/repo", "./sub", true),
+	)
+}
+
+// Only the entrypoint is stage specific: every stage of a docker action receives runs.args
+// and runs.env, and the `entrypoint` input applies to the main stage alone.
+func TestExecAsDockerStageEntrypoint(t *testing.T) {
+	orig := ContainerNewContainer
+	defer func() { ContainerNewContainer = orig }()
+
+	for _, tc := range []struct {
+		name           string
+		stage          stepStage
+		wantEntrypoint []string
+	}{
+		{
+			name:           "main stage prefers the entrypoint input",
+			stage:          stepStageMain,
+			wantEntrypoint: []string{"input.sh"},
+		},
+		{
+			name:           "pre stage uses runs.pre-entrypoint",
+			stage:          stepStagePre,
+			wantEntrypoint: []string{"pre.sh", "--verbose"},
+		},
+		{
+			name:           "post stage uses runs.post-entrypoint",
+			stage:          stepStagePost,
+			wantEntrypoint: []string{"post.sh"},
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			cm := &containerMock{}
+			var input *container.NewContainerInput
+			ContainerNewContainer = func(in *container.NewContainerInput) container.ExecutionsEnvironment {
+				input = in
+				return cm
+			}
+
+			step := &stepActionRemote{
+				Step: &model.Step{ID: "1", Uses: "org/action@v1", With: map[string]string{"entrypoint": "input.sh"}},
+				RunContext: &RunContext{
+					Config:       &Config{},
+					Run:          &model.Run{JobID: "1", Workflow: &model.Workflow{Jobs: map[string]*model.Job{"1": {}}}},
+					JobContainer: cm,
+				},
+				action: &model.Action{Runs: model.ActionRuns{
+					Using:          "docker",
+					Image:          "docker://node:14",
+					PreEntrypoint:  "pre.sh --verbose",
+					Entrypoint:     "main.sh",
+					PostEntrypoint: "post.sh",
+					Args:           []string{"hello"},
+					Env:            map[string]string{"MY_VAR": "world"},
+				}},
+				env: map[string]string{},
+			}
+
+			cm.On("Pull", false).Return(func(context.Context) error { return nil })
+			cm.On("Remove").Return(func(context.Context) error { return nil })
+			cm.On("Create", []string(nil), []string(nil)).Return(func(context.Context) error { return nil })
+			cm.On("Start", true).Return(func(context.Context) error { return nil })
+			cm.On("Close").Return(func(context.Context) error { return nil })
+
+			require.NoError(t, execAsDocker(context.Background(), step, "action", t.TempDir(), t.TempDir(), false, tc.stage))
+			require.NotNil(t, input)
+			assert.Equal(t, tc.wantEntrypoint, input.Entrypoint)
+			assert.Equal(t, []string{"hello"}, input.Cmd)
+			assert.Contains(t, input.Env, "MY_VAR=world")
+		})
+	}
+}
+
+func TestDockerActionHasPreAndPostStep(t *testing.T) {
+	newStep := func(runs model.ActionRuns) actionStep {
+		return &stepActionRemote{action: &model.Action{Runs: runs}}
+	}
+	ctx := context.Background()
+
+	assert.False(t, hasPreStep(newStep(model.ActionRuns{Using: "docker", Image: "Dockerfile"}))(ctx))
+	assert.False(t, hasPostStep(newStep(model.ActionRuns{Using: "docker", Image: "Dockerfile"}))(ctx))
+
+	withStages := model.ActionRuns{Using: "docker", Image: "Dockerfile", PreEntrypoint: "pre.sh", PostEntrypoint: "post.sh"}
+	assert.True(t, hasPreStep(newStep(withStages))(ctx))
+	assert.True(t, hasPostStep(newStep(withStages))(ctx))
+}

act/runner/cancellation_test.go

@@ -0,0 +1,312 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/exprparser"
+	"gitea.com/gitea/runner/act/model"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.yaml.in/yaml/v4"
+)
+
+// TestCancelledJobStatusEnablesAlwaysAndCancelledSteps verifies that once a job is
+// cancelled, getJobContext reports the "cancelled" status so the step `if` functions
+// evaluate the way GitHub Actions does: cancelled()/always() are true, success()/failure()
+// are false. A step that defaults to success() is therefore skipped while an always() step
+// still runs. Before the fix the status could only ever be success/failure, so cancelled()
+// was structurally impossible and cancel-only cleanup steps never ran.
+func TestCancelledJobStatusEnablesAlwaysAndCancelledSteps(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+	rc.markCancelled()
+
+	// The core fix: the job status context now reports "cancelled" instead of being
+	// pinned to success/failure.
+	jobCtx := rc.getJobContext()
+	require.Equal(t, "cancelled", jobCtx.Status)
+
+	// Feed that status through the step-context expression functions, which is what a
+	// step `if` evaluates. On a cancelled job only always()/cancelled() are true.
+	interp := exprparser.NewInterpeter(
+		&exprparser.EvaluationEnvironment{Job: jobCtx},
+		exprparser.Config{Context: "step"},
+	)
+	for expr, want := range map[string]bool{
+		"cancelled()":  true,
+		"always()":     true,
+		"success()":    false,
+		"failure()":    false,
+		"!cancelled()": false,
+	} {
+		got, err := interp.Evaluate(expr, exprparser.DefaultStatusCheckNone)
+		require.NoErrorf(t, err, "Evaluate(%q)", expr)
+		assert.Equalf(t, want, got, "Evaluate(%q) on a cancelled job", expr)
+	}
+
+	// A step without an `if` defaults to success() and must be skipped on cancel,
+	// while an `if: always()` step must still run.
+	disabled, err := interp.Evaluate("", exprparser.DefaultStatusCheckSuccess)
+	require.NoError(t, err)
+	assert.Equal(t, false, disabled, "default-success step must be skipped on a cancelled job")
+
+	enabled, err := interp.Evaluate("always()", exprparser.DefaultStatusCheckSuccess)
+	require.NoError(t, err)
+	assert.Equal(t, true, enabled, "`if: always()` step must run on a cancelled job")
+}
+
+// TestMainStepsExecutorRunsAlwaysStepsAfterCancel verifies that newMainStepsExecutor does
+// not abandon the remaining steps when the run is cancelled mid-pipeline. The later step
+// still runs (so a main-stage always() step is reached), it runs under a fresh,
+// non-cancelled context, and the job is marked cancelled. The interrupt error is still
+// propagated so callers up the chain see the cancellation.
+func TestMainStepsExecutorRunsAlwaysStepsAfterCancel(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	var ran []string
+	var laterStepCtxErr error
+	steps := []common.Executor{
+		func(_ context.Context) error {
+			ran = append(ran, "step1")
+			cancel() // server cancellation lands while step1 runs
+			return nil
+		},
+		func(c context.Context) error {
+			ran = append(ran, "always-step")
+			laterStepCtxErr = c.Err()
+			return nil
+		},
+	}
+
+	err := newMainStepsExecutor(rc, steps)(ctx)
+
+	require.ErrorIs(t, err, context.Canceled, "interrupt error is propagated")
+	assert.Equal(t, []string{"step1", "always-step"}, ran, "the always() step still runs after cancel")
+	require.NoError(t, laterStepCtxErr, "remaining steps run under a fresh, non-cancelled context")
+	assert.True(t, rc.jobCancelled, "the job is marked cancelled")
+}
+
+// TestMainStepsExecutorMarksFailedOnTimeoutBetweenSteps guards the timeout path's symmetry with the cancel path.
+// When the job deadline (timeout-minutes) lands in the gap between two steps, the job must be marked as failed (not cancelled),
+// so always()/failure() cleanup steps run while default success() steps skip, and so the timed-out job is not reported as success.
+func TestMainStepsExecutorMarksFailedOnTimeoutBetweenSteps(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+
+	// A short deadline that we let elapse between steps, so no step records the error itself.
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
+	defer cancel()
+
+	var ran []string
+	var laterStepCtxErr error
+	steps := []common.Executor{
+		func(c context.Context) error {
+			ran = append(ran, "step1")
+			// Block until the job deadline elapses, then return cleanly: the interrupt lands in the loop's between-steps check, not inside a step.
+			<-c.Done()
+			return nil
+		},
+		func(c context.Context) error {
+			ran = append(ran, "always-step")
+			laterStepCtxErr = c.Err()
+			return nil
+		},
+	}
+
+	err := newMainStepsExecutor(rc, steps)(ctx)
+
+	require.ErrorIs(t, err, context.DeadlineExceeded, "the timeout error is propagated")
+	assert.Equal(t, []string{"step1", "always-step"}, ran, "the always() step still runs after a timeout")
+	require.NoError(t, laterStepCtxErr, "remaining steps run under a fresh, non-expired context")
+	assert.True(t, rc.jobFailed, "a job timeout marks the job failed")
+	assert.False(t, rc.jobCancelled, "a timeout is not a cancellation")
+
+	// The status the real main-step `if` evaluation sees: "failure", so default success() steps skip while always()/failure() steps run.
+	assert.Equal(t, "failure", rc.getJobContext().Status)
+}
+
+// TestStepsExecutorRunsMainStepsAfterPreCancel verifies that a cancellation landing during the
+// pre phase does not abandon the main steps: newStepsExecutor still runs the main-steps executor,
+// so a main-stage always()/cancelled() step is reached (under a fresh, non-cancelled context),
+// the job is marked cancelled, and the cancellation is propagated. Before the fix the `.Then(...)`
+// short-circuit skipped the main steps entirely when a pre step was cancelled.
+func TestStepsExecutorRunsMainStepsAfterPreCancel(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	var ran []string
+	var mainStepCtxErr error
+	preSteps := []common.Executor{
+		func(_ context.Context) error {
+			ran = append(ran, "pre1")
+			cancel() // server cancellation lands during the pre phase
+			return nil
+		},
+	}
+	steps := []common.Executor{
+		func(c context.Context) error {
+			ran = append(ran, "always-step")
+			mainStepCtxErr = c.Err()
+			return nil
+		},
+	}
+
+	err := newStepsExecutor(rc, preSteps, steps)(ctx)
+
+	require.ErrorIs(t, err, context.Canceled, "the cancellation is propagated")
+	assert.Equal(t, []string{"pre1", "always-step"}, ran, "the main always() step runs after a pre-phase cancel")
+	require.NoError(t, mainStepCtxErr, "the main step runs under a fresh, non-cancelled context")
+	assert.True(t, rc.jobCancelled, "the job is marked cancelled")
+}
+
+// TestStepsExecutorRunsMainStepsAfterPreFailure verifies that a failing pre step does not abandon
+// the main steps: they still run (so a main-stage always()/failure() step is reached), and the
+// pre-step error is propagated so the job is reported as failed. The main steps' own `if`
+// evaluation is what skips success()-default steps, so running them here is safe.
+func TestStepsExecutorRunsMainStepsAfterPreFailure(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+
+	var ran []string
+	preSteps := []common.Executor{
+		func(_ context.Context) error {
+			ran = append(ran, "pre1")
+			return assert.AnError
+		},
+	}
+	steps := []common.Executor{
+		func(_ context.Context) error {
+			ran = append(ran, "always-step")
+			return nil
+		},
+	}
+
+	err := newStepsExecutor(rc, preSteps, steps)(context.Background())
+
+	require.ErrorIs(t, err, assert.AnError, "the pre-step error is propagated")
+	assert.Equal(t, []string{"pre1", "always-step"}, ran, "the main always() step runs after a pre-step failure")
+	assert.False(t, rc.jobCancelled, "a pre-step failure is not a cancellation")
+}
+
+// TestPreStepFailureAffectsMainStepIfStatus verifies the status path used by real
+// main-step `if` evaluation. A pre-step failure is not present in StepResults, so
+// recording only the context job error is not enough: getJobContext must also report
+// failure so success()-default main steps skip and failure() steps run.
+func TestPreStepFailureAffectsMainStepIfStatus(t *testing.T) {
+	rc := createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, `runs-on: ubuntu-latest`, ""),
+	})
+	ctx := common.WithJobErrorContainer(context.Background())
+
+	reportStepError(ctx, rc, assert.AnError)
+
+	assert.Equal(t, "failure", rc.getJobContext().Status)
+	require.ErrorIs(t, common.JobError(ctx), assert.AnError)
+
+	defaultStep := &stepRun{
+		RunContext: rc,
+		Step:       &model.Step{ID: "default-step"},
+		env:        map[string]string{},
+	}
+	defaultEnabled, err := isStepEnabled(ctx, defaultStep.getIfExpression(ctx, stepStageMain), defaultStep, stepStageMain)
+	require.NoError(t, err)
+	assert.False(t, defaultEnabled, "default success() main step must skip after a pre-step failure")
+
+	failureStep := &stepRun{
+		RunContext: rc,
+		Step: &model.Step{
+			ID: "failure-step",
+			If: yaml.Node{Value: "failure()"},
+		},
+		env: map[string]string{},
+	}
+	failureEnabled, err := isStepEnabled(ctx, failureStep.getIfExpression(ctx, stepStageMain), failureStep, stepStageMain)
+	require.NoError(t, err)
+	assert.True(t, failureEnabled, "failure() main step must run after a pre-step failure")
+}
+
+// TestPostStepsContextCancelledIsUsableForFailingStep guards against a panic: post/cleanup
+// steps run on a context derived from the cancelled job context, and a failing post step
+// records its error via common.SetJobError. If that derived context lacks a job-error container,
+// SetJobError dereferences a nil map and panics. The post context must therefore be detached
+// from cancellation (so the steps run) yet still carry a usable error container.
+func TestPostStepsContextCancelledIsUsableForFailingStep(t *testing.T) {
+	cancelled, cancel := context.WithCancel(common.WithJobErrorContainer(context.Background()))
+	cancel()
+	require.ErrorIs(t, cancelled.Err(), context.Canceled)
+
+	postCtx, done := postStepsContext(cancelled)
+	defer done()
+
+	// Detached from cancellation, so the post steps actually run.
+	require.NoError(t, postCtx.Err(), "post context must not be cancelled")
+
+	// A failing post step records its error instead of panicking.
+	require.NotPanics(t, func() {
+		common.SetJobError(postCtx, assert.AnError)
+	}, "a failing post step must not panic on the cancel path")
+	assert.ErrorIs(t, common.JobError(postCtx), assert.AnError)
+}
+
+// TestPostStepsContextDeadlinePreservesJobError verifies the job-timeout path keeps the original
+// job-error container (via context.WithoutCancel), so the timeout failure and any post-step error
+// survive into the post phase and the job is still reported as failed.
+func TestPostStepsContextDeadlinePreservesJobError(t *testing.T) {
+	base := common.WithJobErrorContainer(context.Background())
+	common.SetJobError(base, assert.AnError)
+	expired, cancel := context.WithDeadline(base, time.Now().Add(-time.Hour))
+	defer cancel()
+	require.ErrorIs(t, expired.Err(), context.DeadlineExceeded)
+
+	postCtx, done := postStepsContext(expired)
+	defer done()
+
+	require.NoError(t, postCtx.Err(), "post context must not carry the expired deadline")
+	assert.ErrorIs(t, common.JobError(postCtx), assert.AnError, "the timeout job error must be preserved")
+}
+
+// reportStepError must treat a context.Canceled (e.g. a teardown-cancelled read) as an
+// interruption, never a job failure.
+func TestReportStepErrorTreatsCancelAsInterruption(t *testing.T) {
+	rc := &RunContext{}
+
+	// stray read cancellation while the job context is live: ignored, not a failure
+	live := common.WithJobErrorContainer(context.Background())
+	reportStepError(live, rc, context.Canceled)
+	require.NoError(t, common.JobError(live))
+	assert.False(t, rc.jobFailed)
+	assert.False(t, rc.jobCancelled)
+
+	// genuine job cancellation: recorded as cancelled, still not a failure
+	cancelled, cancel := context.WithCancel(common.WithJobErrorContainer(context.Background()))
+	cancel()
+	reportStepError(cancelled, rc, context.Canceled)
+	require.NoError(t, common.JobError(cancelled))
+	assert.False(t, rc.jobFailed)
+	assert.True(t, rc.jobCancelled)
+
+	// a real error still fails the job
+	failed := common.WithJobErrorContainer(context.Background())
+	reportStepError(failed, rc, assert.AnError)
+	require.ErrorIs(t, common.JobError(failed), assert.AnError)
+	assert.True(t, rc.jobFailed)
+}

act/runner/command.go

@@ -48,10 +48,13 @@ func (rc *RunContext) commandHandler(ctx context.Context) common.LineHandler {
 		if resumeCommand != "" && command != resumeCommand {
 			// There should not be any emojis in the log output for Gitea.
 			// The code in the switch statement is the same.
+			// Return true (not false) so the line still reaches the raw_output
+			// log handler; otherwise everything between ::stop-commands:: and
+			// its end token is silently dropped from the step log.
 			logger.Infof("%s", line)
-			return false
+			return true
 		}
-		arg = unescapeCommandData(arg)
+		arg = UnescapeCommandData(arg)
 		kvPairs = unescapeKvPairs(kvPairs)
 		switch command {
 		case "set-env":
@@ -151,30 +154,25 @@ func parseKeyValuePairs(kvPairs, separator string) map[string]string {
 	return rtn
 }
 
-func unescapeCommandData(arg string) string {
-	escapeMap := map[string]string{
-		"%25": "%",
-		"%0D": "\r",
-		"%0A": "\n",
-	}
-	for k, v := range escapeMap {
-		arg = strings.ReplaceAll(arg, k, v)
-	}
-	return arg
+// A Replacer never rescans what it wrote, so "%250A" stays a literal "%0A".
+var (
+	commandDataEscaper       = strings.NewReplacer("%", "%25", "\r", "%0D", "\n", "%0A")
+	commandDataUnescaper     = strings.NewReplacer("%25", "%", "%0D", "\r", "%0A", "\n")
+	commandPropertyUnescaper = strings.NewReplacer("%25", "%", "%0D", "\r", "%0A", "\n", "%3A", ":", "%2C", ",")
+)
+
+// escapeCommandData encodes the data part of a "::cmd::" or "##[cmd]" line the runner writes itself,
+// so the log renderer decodes it back. Lines forwarded from step output are already escaped.
+func escapeCommandData(arg string) string {
+	return commandDataEscaper.Replace(arg)
+}
+
+func UnescapeCommandData(arg string) string {
+	return commandDataUnescaper.Replace(arg)
 }
 
 func unescapeCommandProperty(arg string) string {
-	escapeMap := map[string]string{
-		"%25": "%",
-		"%0D": "\r",
-		"%0A": "\n",
-		"%3A": ":",
-		"%2C": ",",
-	}
-	for k, v := range escapeMap {
-		arg = strings.ReplaceAll(arg, k, v)
-	}
-	return arg
+	return commandPropertyUnescaper.Replace(arg)
 }
 
 func unescapeKvPairs(kvPairs map[string]string) map[string]string {

act/runner/command_test.go

@@ -28,6 +28,29 @@ func TestSetEnv(t *testing.T) {
 	a.Equal("valz", rc.Env["x"])
 }
 
+func TestStopCommandsKeepsSuppressedLinesInLog(t *testing.T) {
+	a := assert.New(t)
+	ctx := context.Background()
+	rc := new(RunContext)
+	handler := rc.commandHandler(ctx)
+
+	// Stop command processing until the matching end token is seen.
+	a.True(handler("::stop-commands::my-end-token\n"))
+
+	// A command-shaped line while stopped must not be executed (env unchanged),
+	// but must still return true so it reaches the raw_output log handler and is
+	// not dropped from the step log.
+	a.True(handler("::set-env name=x::valz\n"))
+	a.NotContains(rc.Env, "x")
+
+	// The matching end token resumes command processing.
+	a.True(handler("::my-end-token::\n"))
+
+	// Commands are processed again after resuming.
+	a.True(handler("::set-env name=y::valy\n"))
+	a.Equal("valy", rc.Env["y"])
+}
+
 func TestSetOutput(t *testing.T) {
 	a := assert.New(t)
 	ctx := context.Background()
@@ -191,3 +214,10 @@ func TestSaveState(t *testing.T) {
 
 	assert.Equal(t, "state-value", rc.IntraActionState["step"]["state-name"])
 }
+
+func TestEscapeCommandData(t *testing.T) {
+	a := assert.New(t)
+
+	a.Equal("a%25b%0Dc%0Ad%250A", escapeCommandData("a%b\rc\nd%0A"))
+	a.Equal("a%b\rc\nd%0A", UnescapeCommandData("a%25b%0Dc%0Ad%250A"))
+}

act/runner/expression.go

@@ -56,7 +56,7 @@ func (rc *RunContext) NewExpressionEvaluatorWithEnv(ctx context.Context, env map
 		for _, needs := range jobNeeds {
 			using[needs] = exprparser.Needs{
 				Outputs: jobs[needs].Outputs,
-				Result:  jobs[needs].Result,
+				Result:  jobs[needs].NeedsResult(),
 			}
 		}
 
@@ -95,9 +95,7 @@ func (rc *RunContext) NewExpressionEvaluatorWithEnv(ctx context.Context, env map
 		Inputs:    inputs,
 		HashFiles: getHashFilesFunction(ctx, rc),
 	}
-	if rc.JobContainer != nil {
-		ee.Runner = rc.JobContainer.GetRunnerContext(ctx)
-	}
+	ee.Runner = rc.getRunnerContext(ctx)
 	return expressionEvaluator{
 		interpreter: exprparser.NewInterpeter(ee, exprparser.Config{
 			Run:        rc.Run,
@@ -127,7 +125,7 @@ func (rc *RunContext) NewStepExpressionEvaluator(ctx context.Context, step step)
 	for _, needs := range jobNeeds {
 		using[needs] = exprparser.Needs{
 			Outputs: jobs[needs].Outputs,
-			Result:  jobs[needs].Result,
+			Result:  jobs[needs].NeedsResult(),
 		}
 	}
 
@@ -149,9 +147,7 @@ func (rc *RunContext) NewStepExpressionEvaluator(ctx context.Context, step step)
 		Inputs:    inputs,
 		HashFiles: getHashFilesFunction(ctx, rc),
 	}
-	if rc.JobContainer != nil {
-		ee.Runner = rc.JobContainer.GetRunnerContext(ctx)
-	}
+	ee.Runner = rc.getRunnerContext(ctx)
 	return expressionEvaluator{
 		interpreter: exprparser.NewInterpeter(ee, exprparser.Config{
 			Run:        rc.Run,
@@ -229,7 +225,8 @@ func (ee expressionEvaluator) evaluate(ctx context.Context, in string, defaultSt
 	logger.Debugf("evaluating expression '%s'", in)
 	evaluated, err := ee.interpreter.Evaluate(in, defaultStatusCheck)
 
-	printable := regexp.MustCompile(`::add-mask::.*`).ReplaceAllString(fmt.Sprintf("%t", evaluated), "::add-mask::***)")
+	// evaluated is an any: %t renders everything but a bool as "%!t(string=...)"
+	printable := regexp.MustCompile(`::add-mask::.*`).ReplaceAllString(fmt.Sprintf("%v", evaluated), "::add-mask::***)")
 	logger.Debugf("expression '%s' evaluated to '%s'", in, printable)
 
 	return evaluated, err
@@ -497,11 +494,7 @@ func getEvaluatorInputs(ctx context.Context, rc *RunContext, step step, ghc *mod
 				if value == nil {
 					value = v.Default
 				}
-				if v.Type == "boolean" {
-					inputs[k] = value == "true"
-				} else {
-					inputs[k] = value
-				}
+				inputs[k] = coerceInputValue(value, v.Type)
 			}
 		}
 	}
@@ -514,17 +507,26 @@ func getEvaluatorInputs(ctx context.Context, rc *RunContext, step step, ghc *mod
 				if value == nil {
 					value = v.Default
 				}
-				if v.Type == "boolean" {
-					inputs[k] = value == "true"
-				} else {
-					inputs[k] = value
-				}
+				inputs[k] = coerceInputValue(value, v.Type)
 			}
 		}
 	}
 	return inputs
 }
 
+// coerceInputValue converts an input value to the type declared by the workflow.
+// The event payload carries natively typed JSON values on newer Gitea versions,
+// while defaults and older servers provide strings.
+func coerceInputValue(value any, inputType string) any {
+	if inputType != "boolean" {
+		return value
+	}
+	if b, ok := value.(bool); ok {
+		return b
+	}
+	return value == "true"
+}
+
 func setupWorkflowInputs(ctx context.Context, inputs *map[string]any, rc *RunContext) {
 	if rc.caller != nil {
 		config := rc.Run.Workflow.WorkflowCallConfig()
@@ -548,7 +550,7 @@ func setupWorkflowInputs(ctx context.Context, inputs *map[string]any, rc *RunCon
 				}
 			}
 
-			(*inputs)[name] = value
+			(*inputs)[name] = coerceInputValue(value, input.Type)
 		}
 	}
 }
@@ -562,15 +564,15 @@ func getWorkflowSecrets(ctx context.Context, rc *RunContext) map[string]string {
 			secrets = rc.caller.runContext.Config.Secrets
 		}
 
-		if secrets == nil {
-			secrets = map[string]string{}
-		}
-
+		// Interpolate into a new map. secrets may be the shared Config.Secrets (or the job's
+		// map), which other parallel jobs read concurrently (e.g. log masking), so mutating it
+		// in place is a data race.
+		interpolated := make(map[string]string, len(secrets))
 		for k, v := range secrets {
-			secrets[k] = rc.caller.runContext.ExprEval.Interpolate(ctx, v)
+			interpolated[k] = rc.caller.runContext.ExprEval.Interpolate(ctx, v)
 		}
 
-		return secrets
+		return interpolated
 	}
 
 	return rc.Config.Secrets

act/runner/expression_test.go

@@ -6,12 +6,14 @@ package runner
 
 import (
 	"context"
+	"strings"
 	"testing"
 
 	"gitea.com/gitea/runner/act/exprparser"
 	"gitea.com/gitea/runner/act/model"
 
 	assert "github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	yaml "go.yaml.in/yaml/v4"
 )
 
@@ -321,3 +323,82 @@ func TestRewriteSubExpressionForceFormat(t *testing.T) {
 		})
 	}
 }
+
+func TestGetEvaluatorInputsBoolean(t *testing.T) {
+	workflows := map[string]string{
+		"workflow_call": `
+on:
+  workflow_call:
+    inputs:
+      flag:
+        type: boolean
+        default: true
+      name:
+        type: string
+        default: gitea
+`,
+		"workflow_dispatch": `
+on:
+  workflow_dispatch:
+    inputs:
+      flag:
+        type: boolean
+        default: true
+      name:
+        type: string
+        default: gitea
+`,
+	}
+
+	tables := []struct {
+		name  string
+		event map[string]any
+		flag  any
+	}{
+		{
+			// Gitea >= 1.27 resolves the inputs server-side and sends native JSON types
+			name:  "native bool true",
+			event: map[string]any{"inputs": map[string]any{"flag": true}},
+			flag:  true,
+		},
+		{
+			name:  "native bool false",
+			event: map[string]any{"inputs": map[string]any{"flag": false}},
+			flag:  false,
+		},
+		{
+			name:  "string true",
+			event: map[string]any{"inputs": map[string]any{"flag": "true"}},
+			flag:  true,
+		},
+		{
+			name:  "string false",
+			event: map[string]any{"inputs": map[string]any{"flag": "false"}},
+			flag:  false,
+		},
+		{
+			name:  "default is used when the event carries no inputs",
+			event: map[string]any{},
+			flag:  true,
+		},
+	}
+
+	for eventName, workflow := range workflows {
+		for _, table := range tables {
+			t.Run(eventName+"/"+table.name, func(t *testing.T) {
+				wf, err := model.ReadWorkflow(strings.NewReader(workflow))
+				require.NoError(t, err)
+
+				rc := &RunContext{
+					Config: &Config{Workdir: "."},
+					Run:    &model.Run{JobID: "job1", Workflow: wf},
+				}
+				ghc := &model.GithubContext{EventName: eventName, Event: table.event}
+
+				inputs := getEvaluatorInputs(context.Background(), rc, nil, ghc)
+				assert.Equal(t, table.flag, inputs["flag"])
+				assert.Equal(t, "gitea", inputs["name"])
+			})
+		}
+	}
+}

act/runner/helpers_test.go

@@ -0,0 +1,52 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"os/exec"
+	"runtime"
+	"testing"
+
+	"gitea.com/gitea/runner/act/container"
+
+	mobyclient "github.com/moby/moby/client"
+)
+
+// requireLinuxDocker skips on non-Linux hosts. Some integration workflows need Docker features
+// that only a Linux daemon provides (host networking, host /proc bind mounts); Docker Desktop
+// on macOS/Windows does not, so those tests can only run on Linux.
+func requireLinuxDocker(t *testing.T) {
+	t.Helper()
+	if runtime.GOOS != "linux" {
+		t.Skip("skipping: requires a Linux Docker host")
+	}
+}
+
+// requireDocker skips the test unless a reachable docker daemon is available.
+// GetDockerClient succeeds even without a running daemon (its ping is best-effort),
+// so the daemon has to be pinged explicitly here to decide whether to skip.
+func requireDocker(t *testing.T) {
+	t.Helper()
+	ctx := context.Background()
+	cli, err := container.GetDockerClient(ctx)
+	if err != nil {
+		t.Skipf("skipping: docker client unavailable: %v", err)
+	}
+	defer cli.Close()
+	if _, err := cli.Ping(ctx, mobyclient.PingOptions{}); err != nil {
+		t.Skipf("skipping: docker daemon unreachable: %v", err)
+	}
+}
+
+// requireHostTools skips the test unless every named executable is on PATH. Used by the
+// self-hosted (host environment) suite, which runs steps directly on the host.
+func requireHostTools(t *testing.T, tools ...string) {
+	t.Helper()
+	for _, tool := range tools {
+		if _, err := exec.LookPath(tool); err != nil {
+			t.Skipf("skipping: required host tool %q not found: %v", tool, err)
+		}
+	}
+}

act/runner/job_executor.go

@@ -5,15 +5,48 @@
 package runner
 
 import (
+	"archive/tar"
+	"bytes"
 	"context"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
 	"fmt"
+	"io"
+	"net/http"
+	"path"
+	"slices"
 	"strconv"
+	"strings"
 	"time"
+	"unicode"
 
 	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/container"
+	"gitea.com/gitea/runner/act/exprparser"
 	"gitea.com/gitea/runner/act/model"
 )
 
+const maxJobSummaryBytes = 1024 * 1024
+
+// jobSummaryTruncationMarker is appended to a summary that exceeded the size limit
+// so the rendered output makes the truncation visible instead of silently cutting off.
+const jobSummaryTruncationMarker = "\n\n---\n\n*Job summary truncated: it exceeded the maximum allowed size.*\n"
+
+var (
+	jobSummaryUploadRetryDelay = time.Second
+	// jobSummaryUploadRequestTimeout bounds a single step upload request. It is kept
+	// below jobSummaryUploadPhaseTimeout so one slow or unreachable request times out
+	// and lets the remaining steps still upload within the phase budget, instead of a
+	// single stuck request consuming the whole phase.
+	jobSummaryUploadRequestTimeout = 5 * time.Second
+	// jobSummaryUploadPhaseTimeout bounds the total time spent uploading all step
+	// summaries. The uploads run inside the job cleanup budget that is also used to
+	// stop and remove the container, so a slow or unreachable endpoint must not be
+	// allowed to consume it; this keeps the remaining budget available for teardown.
+	jobSummaryUploadPhaseTimeout = 15 * time.Second
+)
+
 type jobInfo interface {
 	matrix() map[string]any
 	steps() []*model.Step
@@ -24,16 +57,81 @@ type jobInfo interface {
 	result(result string)
 }
 
-// reportStepError emits the GitHub Actions ##[error] annotation and records
-// the error against the job so the job is reported as failed.
-func reportStepError(ctx context.Context, err error) {
-	common.Logger(ctx).Errorf("##[error]%v", err)
+// reportStepError records a step error so the job is reported failed — except a
+// cancellation, which is an interruption, not a failure.
+func reportStepError(ctx context.Context, rc *RunContext, err error) {
+	if errors.Is(err, context.Canceled) {
+		// Defer to the job context: a genuine cancel reports cancelled, a stray teardown
+		// cancellation on a live ctx is ignored — never a step FAILURE.
+		rc.markInterrupted(ctx.Err())
+		return
+	}
+	common.Logger(ctx).Errorf("##[error]%s", escapeCommandData(err.Error()))
 	common.SetJobError(ctx, err)
+	rc.markFailed()
+}
+
+// actionPreparer is implemented by steps that download an action before they run, so the job
+// executor can fetch all of them up front.
+type actionPreparer interface {
+	prepareActionExecutor() common.Executor
+	actionDownloadInfo() (reference, sha string, ok bool)
+}
+
+// printPrepareActions downloads every action the job uses before its first step runs and reports
+// them as actions/runner's "Prepare all required actions" section does. The steps still call
+// prepareActionExecutor themselves; it is a no-op once the action is resolved here.
+func printPrepareActions(rc *RunContext, preparers []actionPreparer) common.Executor {
+	return func(ctx context.Context) error {
+		if len(preparers) == 0 {
+			return nil
+		}
+
+		rawLogger := common.Logger(ctx).WithField(rawOutputField, true)
+		rawLogger.Infof("Prepare all required actions")
+
+		for _, preparer := range preparers {
+			if err := preparer.prepareActionExecutor()(ctx); err != nil {
+				// No step has run yet, so the failure belongs to the job.
+				reportStepError(ctx, rc, err)
+				return err
+			}
+			reference, sha, ok := preparer.actionDownloadInfo()
+			if !ok {
+				continue
+			}
+			if sha == "" {
+				rawLogger.Infof("Download action repository '%s'", reference)
+			} else {
+				rawLogger.Infof("Download action repository '%s' (SHA:%s)", reference, sha)
+			}
+		}
+		return nil
+	}
+}
+
+// printCompleteJobName closes the setup section the way actions/runner ends its "Set up job" step.
+func printCompleteJobName(rc *RunContext) common.Executor {
+	return func(ctx context.Context) error {
+		// Name holds a matrix combination; JobName is the shared name GitHub reports.
+		name := rc.JobName
+		if name == "" {
+			name = rc.Name
+		}
+		if name == "" && rc.Run != nil {
+			name = rc.Run.JobID
+		}
+		common.Logger(ctx).WithField(rawOutputField, true).Infof("Complete job name: %s", name)
+		return nil
+	}
 }
 
 func newJobExecutor(info jobInfo, sf stepFactory, rc *RunContext) common.Executor {
 	steps := make([]common.Executor, 0)
 	preSteps := make([]common.Executor, 0)
+	// Collected separately: every action is downloaded before the first pre step runs.
+	stepPreSteps := make([]common.Executor, 0)
+	preparers := make([]actionPreparer, 0)
 	var postExecutor common.Executor
 
 	steps = append(steps, func(ctx context.Context) error {
@@ -80,35 +178,43 @@ func newJobExecutor(info jobInfo, sf stepFactory, rc *RunContext) common.Executo
 			return common.NewErrorExecutor(err)
 		}
 
+		if preparer, ok := step.(actionPreparer); ok {
+			preparers = append(preparers, preparer)
+		}
+
+		stepIdx := stepModel.Number
 		preExec := step.pre()
-		preSteps = append(preSteps, useStepLogger(rc, stepModel, stepStagePre, func(ctx context.Context) error {
+		stepPreSteps = append(stepPreSteps, useStepLogger(rc, stepModel, stepStagePre, func(ctx context.Context) error {
+			rc.CurrentStepIndex = stepIdx
 			preErr := preExec(ctx)
 			if preErr != nil {
-				reportStepError(ctx, preErr)
+				reportStepError(ctx, rc, preErr)
 			} else if ctx.Err() != nil {
-				reportStepError(ctx, ctx.Err())
+				reportStepError(ctx, rc, ctx.Err())
 			}
 			return preErr
 		}))
 
 		stepExec := step.main()
 		steps = append(steps, useStepLogger(rc, stepModel, stepStageMain, func(ctx context.Context) error {
+			rc.CurrentStepIndex = stepIdx
 			err := stepExec(ctx)
 			if err != nil {
-				reportStepError(ctx, err)
+				reportStepError(ctx, rc, err)
 			} else if ctx.Err() != nil {
-				reportStepError(ctx, ctx.Err())
+				reportStepError(ctx, rc, ctx.Err())
 			}
 			return nil
 		}))
 
 		postFn := step.post()
 		postExec := useStepLogger(rc, stepModel, stepStagePost, func(ctx context.Context) error {
+			rc.CurrentStepIndex = stepIdx
 			err := postFn(ctx)
 			if err != nil {
-				reportStepError(ctx, err)
+				reportStepError(ctx, rc, err)
 			} else if ctx.Err() != nil {
-				reportStepError(ctx, ctx.Err())
+				reportStepError(ctx, rc, ctx.Err())
 			}
 			return err
 		})
@@ -120,15 +226,31 @@ func newJobExecutor(info jobInfo, sf stepFactory, rc *RunContext) common.Executo
 		}
 	}
 
+	// The setup section of the job log. The started hook goes first, so what it sets up is
+	// in place for the first action download and the first step.
+	preSteps = append(preSteps, rc.runJobStartedHook)
+	preSteps = append(preSteps, printPrepareActions(rc, preparers))
+	preSteps = append(preSteps, stepPreSteps...)
+	preSteps = append(preSteps, printCompleteJobName(rc))
+
+	// Ahead of the teardown below, while the job environment is still up.
+	postExecutor = postExecutor.Finally(rc.runJobCompletedHook)
+
 	postExecutor = postExecutor.Finally(func(ctx context.Context) error {
 		jobError := common.JobError(ctx)
 		var err error
-		if rc.Config.AutoRemove || jobError == nil {
+		// jobError == nil keeps a failed job's container alive for post-mortem debugging when
+		// AutoRemove is off (the act-CLI --rm behavior; the shipped runner always sets
+		// AutoRemove). A cancelled run is not a failure to inspect, and the cancel-path post
+		// context now carries its own error container so a failing post step makes jobError
+		// non-nil — OR in rc.jobCancelled so cancellation still always tears the container down.
+		if rc.Config.AutoRemove || jobError == nil || rc.jobCancelled {
 			// always allow 1 min for stopping and removing the runner, even if we were cancelled
 			ctx, cancel := context.WithTimeout(common.WithLogger(context.Background(), common.Logger(ctx)), time.Minute)
 			defer cancel()
 
 			logger := common.Logger(ctx)
+			tryUploadJobSummary(ctx, rc)
 			// For Gitea
 			// We don't need to call `stopServiceContainers` here since it will be called by following `info.stopContainer`
 			// logger.Infof("Cleaning up services for job %s", rc.JobName)
@@ -161,40 +283,136 @@ func newJobExecutor(info jobInfo, sf stepFactory, rc *RunContext) common.Executo
 		return err
 	})
 
-	pipeline := make([]common.Executor, 0)
-	pipeline = append(pipeline, preSteps...)
-	pipeline = append(pipeline, steps...)
+	stepsExecutor := newStepsExecutor(rc, preSteps, steps)
 
-	return common.NewPipelineExecutor(info.startContainer(), common.NewPipelineExecutor(pipeline...).
+	return common.NewPipelineExecutor(info.startContainer(), stepsExecutor.
 		Finally(func(ctx context.Context) error {
-			var cancel context.CancelFunc
-			if ctx.Err() == context.Canceled {
-				// in case of an aborted run, we still should execute the
-				// post steps to allow cleanup.
-				ctx, cancel = context.WithTimeout(common.WithLogger(context.Background(), common.Logger(ctx)), 5*time.Minute)
-				defer cancel()
-			}
-			return postExecutor(ctx)
+			// Record an interrupt (backstop for interrupts that land outside the main
+			// step loop) so the post steps observe the cancelled/failed job status.
+			rc.markInterrupted(ctx.Err())
+			postCtx, cancel := postStepsContext(ctx)
+			defer cancel()
+			return postExecutor(postCtx)
 		}).
 		Finally(info.interpolateOutputs()).
 		Finally(info.closeContainer()))
 }
 
+// postStepsContext derives the context used to run the job's post/cleanup steps from the
+// finished main-pipeline context. Cleanup has to run even when the run was interrupted, so the
+// returned context always carries a fresh bounded deadline and is never itself cancelled.
+//
+//   - context.Canceled (server cancel): detach from the cancelled context via a fresh root so
+//     the post steps can run.
+//   - context.DeadlineExceeded (job timeout): detach the deadline with WithoutCancel, which
+//     keeps the original values — including the job-error container — so the timeout failure and
+//     any post-step error are preserved and the job is still reported as failed.
+//   - otherwise: run on the live context unchanged.
+func postStepsContext(ctx context.Context) (context.Context, context.CancelFunc) {
+	switch ctx.Err() {
+	case context.Canceled:
+		// The cancelled context is abandoned for a fresh root, which drops the job-error
+		// container installed at the job root. Re-attach a fresh one so a failing post step
+		// records its error via SetJobError instead of panicking on a nil container.
+		return context.WithTimeout(common.WithJobErrorContainer(common.WithLogger(context.Background(), common.Logger(ctx))), 5*time.Minute)
+	case context.DeadlineExceeded:
+		return context.WithTimeout(context.WithoutCancel(ctx), 5*time.Minute)
+	default:
+		return ctx, func() {}
+	}
+}
+
+// newStepsExecutor sequences the job's pre steps and main steps.
+//
+// The pre steps run as a normal pipeline that short-circuits on the first failure or
+// cancellation. The main-steps executor then runs unconditionally — even if a pre step failed
+// or the job was interrupted — so always()/cancelled()/failure() main steps still run, mirroring
+// GitHub Actions. This is safe because each main step re-evaluates its own `if` (a pre-step
+// failure flips the expression job status to failure, so success()-default steps skip) and
+// newMainStepsExecutor detaches from an interrupted context before running the remaining steps.
+//
+// A pre-step failure or interrupt is still propagated so the job is reported with the correct
+// conclusion; the pre error takes precedence since it happened first.
+func newStepsExecutor(rc *RunContext, preSteps, steps []common.Executor) common.Executor {
+	preExecutor := common.NewPipelineExecutor(preSteps...)
+	mainExecutor := newMainStepsExecutor(rc, steps)
+	return func(ctx context.Context) error {
+		preErr := preExecutor(ctx)
+		mainErr := mainExecutor(ctx)
+		if preErr != nil {
+			return preErr
+		}
+		return mainErr
+	}
+}
+
+// newMainStepsExecutor runs the job's main-stage step executors in order. Unlike a plain
+// pipeline, an interruption (context.Canceled from a server cancel, or context.DeadlineExceeded
+// from the job timeout) does not abandon the remaining steps: it marks the job cancelled when
+// appropriate and keeps iterating under a fresh, bounded context so steps whose `if` still
+// evaluates true — always() and cancelled() — run for cleanup, mirroring GitHub Actions. Steps
+// that default to success() skip themselves because success() is false once the job is no longer
+// successful. The main-step wrappers report their own errors and return nil, so the loop drives
+// step ordering off the context, not return values.
+func newMainStepsExecutor(rc *RunContext, steps []common.Executor) common.Executor {
+	return func(ctx context.Context) error {
+		for i, step := range steps {
+			if ctx.Err() != nil {
+				return runMainStepsAfterInterrupt(ctx, rc, steps[i:])
+			}
+			_ = step(ctx)
+		}
+		// An interrupt can land during the final step, after the loop's last context
+		// check; record it so the post steps still observe the cancelled/failed status.
+		rc.markInterrupted(ctx.Err())
+		return nil
+	}
+}
+
+// runMainStepsAfterInterrupt runs the remaining main steps after the job context was cancelled or
+// timed out. It detaches from the interrupted context (keeping its values: logger and job error)
+// and applies a fresh deadline so always()/cancelled() steps run to completion. The original
+// interrupt error is returned so callers up the chain still see the job as cancelled/timed out.
+func runMainStepsAfterInterrupt(ctx context.Context, rc *RunContext, steps []common.Executor) error {
+	interruptErr := ctx.Err()
+	rc.markInterrupted(interruptErr)
+	freshCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 5*time.Minute)
+	defer cancel()
+	for _, step := range steps {
+		_ = step(freshCtx)
+	}
+	return interruptErr
+}
+
 func setJobResult(ctx context.Context, info jobInfo, rc *RunContext, success bool) {
 	logger := common.Logger(ctx)
 
-	jobResult := "success"
-	// we have only one result for a whole matrix build, so we need
-	// to keep an existing result state if we run a matrix
-	if len(info.matrix()) > 0 && rc.Run.Job().Result != "" {
-		jobResult = rc.Run.Job().Result
-	}
-
+	// Matrix combinations share one *model.Job and run in parallel; serialize the
+	// read-modify-write of the job result so a failing combination is not lost-updated by a
+	// concurrent succeeding one.
+	job := rc.Run.Job()
+	var continueOnError bool
 	if !success {
-		jobResult = "failure"
+		// Use a fresh context so an expired job timeout cannot block expression evaluation.
+		evalCtx := common.WithLogger(context.Background(), common.Logger(ctx))
+		continueOnError = evaluateJobContinueOnError(evalCtx, rc, job)
 	}
+	jobResult := func() string {
+		defer lockJob(job)()
+		result := "success"
+		// we have only one result for a whole matrix build, so we need
+		// to keep an existing result state if we run a matrix
+		if len(info.matrix()) > 0 && job.Result != "" {
+			result = job.Result
+		}
+		if !success {
+			result = "failure"
+			job.SetContinueOnError(continueOnError)
+		}
+		info.result(result)
+		return result
+	}()
 
-	info.result(jobResult)
 	if rc.caller != nil {
 		// set reusable workflow job result
 		rc.caller.setReusedWorkflowJobResult(rc.JobName, jobResult) // For Gitea
@@ -220,10 +438,214 @@ func setJobOutputs(ctx context.Context, rc *RunContext) {
 			callerOutputs[k] = ee.Interpolate(ctx, ee.Interpolate(ctx, v.Value))
 		}
 
-		rc.caller.runContext.Run.Job().Outputs = callerOutputs
+		// Matrix combinations of a reusable-workflow caller share the caller's *model.Job;
+		// serialize the write so parallel combos don't race on its Outputs field.
+		callerJob := rc.caller.runContext.Run.Job()
+		defer lockJob(callerJob)()
+		callerJob.Outputs = callerOutputs
 	}
 }
 
+// applyJobTimeout applies the job-level timeout-minutes to ctx, mirroring the
+// step-level evaluateStepTimeout in step.go.
+func applyJobTimeout(ctx context.Context, rc *RunContext, job *model.Job) (context.Context, context.CancelFunc) {
+	timeout := rc.ExprEval.Interpolate(ctx, job.TimeoutMinutes)
+	if timeout != "" {
+		if timeoutMinutes, err := strconv.ParseInt(timeout, 10, 64); err == nil {
+			return context.WithTimeout(ctx, time.Duration(timeoutMinutes)*time.Minute)
+		}
+	}
+	return ctx, func() {}
+}
+
+// evaluateJobContinueOnError evaluates the job-level continue-on-error expression.
+func evaluateJobContinueOnError(ctx context.Context, rc *RunContext, job *model.Job) bool {
+	expr := strings.TrimSpace(job.RawContinueOnError)
+	if expr == "" {
+		return false
+	}
+	continueOnError, err := EvalBool(ctx, rc.NewExpressionEvaluator(ctx), expr, exprparser.DefaultStatusCheckNone)
+	if err != nil {
+		common.Logger(ctx).Warnf("continue-on-error expression %q evaluation failed: %v", expr, err)
+		return false
+	}
+	return continueOnError
+}
+
+func tryUploadJobSummary(ctx context.Context, rc *RunContext) {
+	if rc == nil || rc.JobContainer == nil || rc.Config == nil {
+		return
+	}
+	// Bound the whole upload phase so a slow or unreachable endpoint cannot consume
+	// the job cleanup budget reserved for stopping and removing the container.
+	ctx, cancel := context.WithTimeout(ctx, jobSummaryUploadPhaseTimeout)
+	defer cancel()
+	env := rc.GetEnv()
+	caps := strings.TrimSpace(env["GITEA_ACTIONS_CAPABILITIES"])
+	if !hasJobSummaryCapability(caps) {
+		// Server did not advertise support. Do not attempt upload.
+		return
+	}
+	runtimeURL := strings.TrimSpace(env["ACTIONS_RUNTIME_URL"])
+	runtimeToken := strings.TrimSpace(env["ACTIONS_RUNTIME_TOKEN"])
+	runID := strings.TrimSpace(env["GITEA_RUN_ID"])
+	if runtimeURL == "" || runtimeToken == "" || runID == "" {
+		return
+	}
+	if rc.Run == nil || rc.Run.Job() == nil {
+		return
+	}
+	// The numeric ActionRunJob ID is not exposed in the proto Task message or task context,
+	// but the server signs it into the ACTIONS_RUNTIME_TOKEN JWT claims. We decode the
+	// unverified claims to retrieve it; the server re-verifies the token on the request.
+	jobID := extractJobIDFromRuntimeToken(runtimeToken)
+	if jobID <= 0 {
+		return
+	}
+
+	base := strings.TrimRight(runtimeURL, "/") + "/_apis/pipelines/workflows/" + runID +
+		"/jobs/" + strconv.FormatInt(jobID, 10) + "/steps/"
+	actPath := rc.JobContainer.GetActPath()
+	// Reuse a single client across all step uploads so connections can be pooled.
+	client := &http.Client{Timeout: jobSummaryUploadRequestTimeout}
+	for i := range rc.Run.Job().Steps {
+		summaryPath := path.Join(actPath, "workflow", "step-summary-"+strconv.Itoa(i)+".md")
+		body, ok := readSingleFileFromContainerArchive(ctx, rc.JobContainer, summaryPath, maxJobSummaryBytes)
+		if !ok || len(body) == 0 {
+			continue
+		}
+		uploadJobSummary(ctx, client, base+strconv.Itoa(i)+"/summary", runtimeToken, body)
+	}
+}
+
+// extractJobIDFromRuntimeToken returns the JobID claim from an ACTIONS_RUNTIME_TOKEN JWT
+// without verifying its signature. Returns 0 if the token is unparseable or has no JobID.
+func extractJobIDFromRuntimeToken(token string) int64 {
+	parts := strings.Split(token, ".")
+	if len(parts) != 3 {
+		return 0
+	}
+	payload, err := base64.RawURLEncoding.DecodeString(parts[1])
+	if err != nil {
+		return 0
+	}
+	var claims struct {
+		JobID int64 `json:"JobID"`
+	}
+	if err := json.Unmarshal(payload, &claims); err != nil {
+		return 0
+	}
+	return claims.JobID
+}
+
+func hasJobSummaryCapability(caps string) bool {
+	return slices.Contains(strings.FieldsFunc(caps, func(r rune) bool {
+		return r == ',' || unicode.IsSpace(r)
+	}), "job-summary")
+}
+
+func uploadJobSummary(ctx context.Context, client *http.Client, url, runtimeToken string, body []byte) {
+	logger := common.Logger(ctx)
+
+	var lastStatus int
+	var lastErr error
+	for attempt := 0; attempt < 2; attempt++ {
+		status, err := putJobSummary(ctx, client, url, runtimeToken, body)
+		if err == nil && status/100 == 2 {
+			return
+		}
+		lastStatus = status
+		lastErr = err
+		if attempt == 1 || !isTransientJobSummaryUploadFailure(status, err) {
+			break
+		}
+		timer := time.NewTimer(jobSummaryUploadRetryDelay)
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			lastErr = ctx.Err()
+			attempt = 1
+		case <-timer.C:
+		}
+	}
+
+	// Best-effort only; do not fail job, but log because capability was advertised.
+	if lastErr != nil {
+		logger.WithError(lastErr).Warn("job summary upload failed")
+		return
+	}
+	logger.Warnf("job summary upload failed: status=%d", lastStatus)
+}
+
+func putJobSummary(ctx context.Context, client *http.Client, url, runtimeToken string, body []byte) (int, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodPut, url, bytes.NewReader(body))
+	if err != nil {
+		return 0, err
+	}
+	req.Header.Set("Authorization", "Bearer "+runtimeToken)
+	req.Header.Set("Content-Type", "text/markdown; charset=utf-8")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return 0, err
+	}
+	defer resp.Body.Close()
+	_, _ = io.Copy(io.Discard, resp.Body)
+	return resp.StatusCode, nil
+}
+
+func isTransientJobSummaryUploadFailure(status int, err error) bool {
+	return err != nil || status == http.StatusRequestTimeout || status == http.StatusTooManyRequests || status/100 == 5
+}
+
+func readSingleFileFromContainerArchive(ctx context.Context, env container.ExecutionsEnvironment, p string, maxBytes int64) ([]byte, bool) {
+	rc, err := env.GetContainerArchive(ctx, p)
+	if err != nil {
+		return nil, false
+	}
+	defer rc.Close()
+
+	tr := tar.NewReader(rc)
+	for {
+		header, err := tr.Next()
+		if err == io.EOF {
+			return nil, false
+		}
+		if err != nil {
+			return nil, false
+		}
+		if header.Typeflag != tar.TypeReg {
+			continue
+		}
+		if !archiveEntryMatchesPath(header.Name, p) {
+			continue
+		}
+		// Summaries larger than the limit are truncated rather than dropped, so the
+		// user still gets the leading content (mirroring how GitHub caps oversized
+		// step summaries instead of discarding them). Read one extra byte so an
+		// over-limit file is detected from the actual stream rather than trusting
+		// header.Size, then cap the returned content at maxBytes.
+		b, err := io.ReadAll(io.LimitReader(tr, maxBytes+1))
+		if err != nil {
+			return nil, false
+		}
+		if int64(len(b)) > maxBytes {
+			// Reserve room for the marker so the marked-up result still fits in maxBytes.
+			marker := []byte(jobSummaryTruncationMarker)
+			keep := max(maxBytes-int64(len(marker)), 0)
+			b = append(b[:keep], marker...)
+			common.Logger(ctx).Warnf("job summary truncated: path=%s max=%d", p, maxBytes)
+		}
+		return b, true
+	}
+}
+
+func archiveEntryMatchesPath(entryName, requestedPath string) bool {
+	entryName = path.Clean(strings.TrimPrefix(entryName, "/"))
+	requestedPath = path.Clean(strings.TrimPrefix(requestedPath, "/"))
+	return entryName == requestedPath || entryName == path.Base(requestedPath)
+}
+
 func useStepLogger(rc *RunContext, stepModel *model.Step, stage stepStage, executor common.Executor) common.Executor {
 	return func(ctx context.Context) error {
 		ctx = withStepLogger(ctx, stepModel.Number, stepModel.ID, rc.ExprEval.Interpolate(ctx, stepModel.String()), stage.String())
@@ -241,6 +663,11 @@ func useStepLogger(rc *RunContext, stepModel *model.Step, stage stepStage, execu
 		oldout, olderr := rc.JobContainer.ReplaceLogWriter(logWriter, logWriter)
 		defer rc.JobContainer.ReplaceLogWriter(oldout, olderr)
 
+		// Flush any buffered, not-yet-newline-terminated trailing line once the
+		// step has finished, so the final line of the step's output is not lost
+		// when it is not newline-terminated.
+		defer common.FlushWriter(logWriter)
+
 		return executor(ctx)
 	}
 }

act/runner/job_executor_test.go

@@ -5,40 +5,49 @@
 package runner
 
 import (
+	"archive/tar"
+	"bytes"
 	"context"
+	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
+	"net/http"
+	"net/http/httptest"
 	"slices"
+	"strconv"
+	"strings"
 	"testing"
+	"time"
 
 	"gitea.com/gitea/runner/act/common"
 	"gitea.com/gitea/runner/act/container"
 	"gitea.com/gitea/runner/act/model"
 
+	log "github.com/sirupsen/logrus"
+	logrustest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+	yaml "go.yaml.in/yaml/v4"
 )
 
 func TestJobExecutor(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
-	}
+	t.Parallel()
+	// Dryrun only checks syntax/planning; all cases resolve locally, so this runs offline.
 	tables := []TestJobFileInfo{
 		{workdir, "uses-and-run-in-one-step", "push", "Invalid run/uses syntax for job:test step:Test", platforms, secrets},
 		{workdir, "uses-github-empty", "push", "Expected format {org}/{repo}[/path]@ref", platforms, secrets},
 		{workdir, "uses-github-noref", "push", "Expected format {org}/{repo}[/path]@ref", platforms, secrets},
 		{workdir, "uses-github-root", "push", "", platforms, secrets},
-		{workdir, "uses-github-path", "push", "", platforms, secrets},
 		{workdir, "uses-docker-url", "push", "", platforms, secrets},
-		{workdir, "uses-github-full-sha", "push", "", platforms, secrets},
-		{workdir, "uses-github-short-sha", "push", "Unable to resolve action `actions/hello-world-docker-action@b136eb8`, the provided ref `b136eb8` is the shortened version of a commit SHA, which is not supported. Please use the full commit SHA `b136eb8894c5cb1dd5807da824be97ccdf9b5423` instead", platforms, secrets},
 		{workdir, "job-nil-step", "push", "invalid Step 0: missing run or uses key", platforms, secrets},
 	}
 	// These tests are sufficient to only check syntax.
 	ctx := common.WithDryrun(context.Background(), true)
 	for _, table := range tables {
 		t.Run(table.workflowPath, func(t *testing.T) {
+			t.Parallel()
 			table.runTest(ctx, t, &Config{})
 		})
 	}
@@ -105,6 +114,182 @@ func (sfm *stepFactoryMock) newStep(model *model.Step, rc *RunContext) (step, er
 	return args.Get(0).(step), args.Error(1)
 }
 
+// actionPreparerMock stands in for a step whose action is downloaded before the job's first step.
+type actionPreparerMock struct {
+	reference string
+	sha       string
+	ok        bool
+	err       error
+	prepared  int
+}
+
+func (apm *actionPreparerMock) prepareActionExecutor() common.Executor {
+	return func(context.Context) error {
+		apm.prepared++
+		return apm.err
+	}
+}
+
+func (apm *actionPreparerMock) actionDownloadInfo() (string, string, bool) {
+	return apm.reference, apm.sha, apm.ok
+}
+
+func TestPrintPrepareActionsGolden(t *testing.T) {
+	buf := &bytes.Buffer{}
+	logger := log.New()
+	logger.SetOutput(buf)
+	logger.SetLevel(log.InfoLevel)
+	logger.SetFormatter(&jobLogFormatter{color: cyan})
+	ctx := common.WithLogger(context.Background(), logger.WithFields(log.Fields{"job": "j1"}))
+
+	preparers := []actionPreparer{
+		&actionPreparerMock{reference: "actions/checkout@v7", sha: "9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0", ok: true},
+		// A resolved commit is best effort; the ref alone is reported when it is unknown.
+		&actionPreparerMock{reference: "actions/setup-go@v6", ok: true},
+		// A step that downloads nothing, such as the checkout of the workflow's own repository.
+		&actionPreparerMock{ok: false},
+	}
+	require.NoError(t, printPrepareActions(&RunContext{}, preparers)(ctx))
+
+	want := strings.Join([]string{
+		"[j1]   | Prepare all required actions",
+		"[j1]   | Download action repository 'actions/checkout@v7' (SHA:9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0)",
+		"[j1]   | Download action repository 'actions/setup-go@v6'",
+		"",
+	}, "\n")
+	assert.Equal(t, want, buf.String())
+}
+
+func TestPrintPrepareActionsSkipsWithoutActions(t *testing.T) {
+	buf := &bytes.Buffer{}
+	logger := log.New()
+	logger.SetOutput(buf)
+	logger.SetFormatter(&jobLogFormatter{color: cyan})
+	ctx := common.WithLogger(context.Background(), logger.WithFields(log.Fields{"job": "j1"}))
+
+	require.NoError(t, printPrepareActions(&RunContext{}, nil)(ctx))
+
+	assert.Empty(t, buf.String())
+}
+
+func TestPrintPrepareActionsFailsJobOnDownloadError(t *testing.T) {
+	logger, _ := logrustest.NewNullLogger()
+	ctx := common.WithJobErrorContainer(common.WithLogger(context.Background(), logger.WithField("job", "j1")))
+
+	downloadErr := errors.New("failed to fetch \"actions/checkout\"")
+	rc := &RunContext{}
+	remaining := &actionPreparerMock{reference: "actions/setup-go@v6", ok: true}
+
+	err := printPrepareActions(rc, []actionPreparer{
+		&actionPreparerMock{err: downloadErr},
+		remaining,
+	})(ctx)
+
+	require.ErrorIs(t, err, downloadErr)
+	// No step has run yet, so the failure has to be recorded against the job itself.
+	assert.Equal(t, downloadErr, common.JobError(ctx))
+	assert.True(t, rc.jobFailed)
+	assert.Zero(t, remaining.prepared)
+}
+
+func TestPrintCompleteJobName(t *testing.T) {
+	for name, tt := range map[string]struct {
+		rc   *RunContext
+		want string
+	}{
+		"job name":            {rc: &RunContext{JobName: "lint", Name: "lint-1"}, want: "lint"},
+		"falls back to name":  {rc: &RunContext{Name: "lint-1"}, want: "lint-1"},
+		"falls back to jobID": {rc: &RunContext{Run: &model.Run{JobID: "lint"}}, want: "lint"},
+	} {
+		t.Run(name, func(t *testing.T) {
+			buf := &bytes.Buffer{}
+			logger := log.New()
+			logger.SetOutput(buf)
+			logger.SetFormatter(&jobLogFormatter{color: cyan})
+			ctx := common.WithLogger(context.Background(), logger.WithFields(log.Fields{"job": "j1"}))
+
+			require.NoError(t, printCompleteJobName(tt.rc)(ctx))
+
+			assert.Equal(t, "[j1]   | Complete job name: "+tt.want+"\n", buf.String())
+		})
+	}
+}
+
+// actionStepMock is a step whose action has to be downloaded before it can run.
+type actionStepMock struct {
+	*stepMock
+	*actionPreparerMock
+}
+
+// TestNewJobExecutorDownloadsAllActionsBeforeTheFirstStep pins the shape of the setup section:
+// every action is downloaded before any step runs, and the job name closes the section. A pre
+// step that downloaded its own action would leave the log interleaved with the downloads.
+func TestNewJobExecutorDownloadsAllActionsBeforeTheFirstStep(t *testing.T) {
+	ctx := common.WithJobErrorContainer(context.Background())
+	jim := &jobInfoMock{}
+	sfm := &stepFactoryMock{}
+	rc := &RunContext{
+		JobContainer: &jobContainerMock{},
+		Run: &model.Run{
+			JobID: "test",
+			Workflow: &model.Workflow{
+				Jobs: map[string]*model.Job{"test": {}},
+			},
+		},
+		Config: &Config{},
+	}
+	rc.ExprEval = rc.NewExpressionEvaluator(ctx)
+
+	steps := []*model.Step{{ID: "1"}, {ID: "2"}}
+	executorOrder := make([]string, 0)
+
+	jim.On("steps").Return(steps)
+	jim.On("matrix").Return(map[string]any{})
+	jim.On("startContainer").Return(func(context.Context) error { return nil })
+	jim.On("stopContainer").Return(func(context.Context) error { return nil })
+	jim.On("closeContainer").Return(func(context.Context) error { return nil })
+	jim.On("interpolateOutputs").Return(func(context.Context) error { return nil })
+	jim.On("result", "success")
+
+	for _, stepModel := range steps {
+		sm := &stepMock{}
+		apm := &actionPreparerMock{reference: "actions/checkout@v" + stepModel.ID, ok: true}
+		sfm.On("newStep", stepModel, rc).Return(&actionStepMock{stepMock: sm, actionPreparerMock: apm}, nil)
+
+		sm.On("pre").Return(func(context.Context) error {
+			executorOrder = append(executorOrder, "pre"+stepModel.ID)
+			return nil
+		})
+		sm.On("main").Return(func(context.Context) error {
+			executorOrder = append(executorOrder, "step"+stepModel.ID)
+			return nil
+		})
+		sm.On("post").Return(func(context.Context) error { return nil })
+
+		defer sm.AssertExpectations(t)
+	}
+
+	logger, hook := logrustest.NewNullLogger()
+	err := newJobExecutor(jim, sfm, rc)(common.WithLogger(ctx, logger.WithField("job", "test")))
+	require.NoError(t, err)
+
+	assert.Equal(t, []string{"pre1", "pre2", "step1", "step2"}, executorOrder)
+
+	setup := make([]string, 0)
+	for _, entry := range hook.AllEntries() {
+		if strings.HasPrefix(entry.Message, "Prepare all required actions") || strings.HasPrefix(entry.Message, "Download action") ||
+			strings.HasPrefix(entry.Message, "Complete job name") {
+			setup = append(setup, entry.Message)
+		}
+	}
+	assert.Equal(t, []string{
+		"Prepare all required actions",
+		"Download action repository 'actions/checkout@v1'",
+		"Download action repository 'actions/checkout@v2'",
+		"Complete job name: test",
+	}, setup)
+}
+
 func TestNewJobExecutor(t *testing.T) {
 	table := []struct {
 		name          string
@@ -341,3 +526,559 @@ func TestNewJobExecutor(t *testing.T) {
 		})
 	}
 }
+
+// TestNewJobExecutorRunsPostStepsAfterTimeout guards the timeout-minutes cleanup
+// path: when a job exceeds its timeout the job context is DeadlineExceeded, but
+// the post steps (cleanup hooks like actions/checkout post and cache save) must
+// still run against a fresh, non-expired context, and the job must still be
+// reported as failed.
+func TestNewJobExecutorRunsPostStepsAfterTimeout(t *testing.T) {
+	ctx := common.WithJobErrorContainer(context.Background())
+	// The timeout is generous so the main step (which blocks on ctx.Done below) is
+	// always reached before the deadline fires; otherwise the pipeline would
+	// short-circuit before the step runs and the job error would never be set.
+	ctx, cancel := context.WithTimeout(ctx, 200*time.Millisecond)
+	defer cancel()
+
+	jim := &jobInfoMock{}
+	sfm := &stepFactoryMock{}
+	rc := &RunContext{
+		JobContainer: &jobContainerMock{},
+		Run: &model.Run{
+			JobID: "test",
+			Workflow: &model.Workflow{
+				Jobs: map[string]*model.Job{
+					"test": {},
+				},
+			},
+		},
+		Config: &Config{},
+	}
+	rc.ExprEval = rc.NewExpressionEvaluator(ctx)
+
+	stepModel := &model.Step{ID: "1"}
+	jim.On("steps").Return([]*model.Step{stepModel})
+	jim.On("matrix").Return(map[string]any{})
+	jim.On("startContainer").Return(func(ctx context.Context) error { return nil })
+	jim.On("interpolateOutputs").Return(func(ctx context.Context) error { return nil })
+	jim.On("closeContainer").Return(func(ctx context.Context) error { return nil })
+	// The job timed out, so it must be reported as failed. stopContainer is left
+	// unexpected on purpose: a timed-out (failed) job preserves its error state, so
+	// the graceful stop is skipped exactly like any other failure without AutoRemove.
+	jim.On("result", "failure")
+
+	sm := &stepMock{}
+	sfm.On("newStep", stepModel, rc).Return(sm, nil)
+	sm.On("pre").Return(func(ctx context.Context) error { return nil })
+	// The main step runs past the job timeout: it blocks until the job context is
+	// done, mirroring a step that overruns timeout-minutes.
+	sm.On("main").Return(func(ctx context.Context) error {
+		<-ctx.Done()
+		return ctx.Err()
+	})
+
+	var postRan bool
+	var postCtxErr error
+	sm.On("post").Return(func(ctx context.Context) error {
+		postRan = true
+		postCtxErr = ctx.Err()
+		return nil
+	})
+
+	executor := newJobExecutor(jim, sfm, rc)
+	// The executor itself returns nil on timeout: the failure is surfaced through
+	// the job result ("failure", asserted via the result mock below), not the
+	// return value.
+	require.NoError(t, executor(ctx))
+
+	assert.True(t, postRan, "post step must run after a job timeout")
+	require.NoError(t, postCtxErr, "post step must run against a fresh, non-expired context")
+
+	jim.AssertExpectations(t)
+	sfm.AssertExpectations(t)
+	sm.AssertExpectations(t)
+}
+
+// TestSetJobResultMatrixContinueOnError exercises the parallel-matrix path
+// end-to-end: two combinations share one *model.Job and continue-on-error is
+// keyed on matrix.experimental, so one combination tolerates its failure and the
+// other does not. The job is reported as continue-on-error only when EVERY failing
+// combination was tolerated; a single firm failure makes the whole job firm, and
+// handleFailure then fails the run.
+func TestSetJobResultMatrixContinueOnError(t *testing.T) {
+	const jobYAML = "continue-on-error: ${{ matrix.experimental }}\nruns-on: ubuntu-latest"
+
+	newSharedJob := func(t *testing.T) (*model.Job, *model.Workflow) {
+		t.Helper()
+		var job *model.Job
+		require.NoError(t, yaml.Unmarshal([]byte(jobYAML), &job))
+		return job, &model.Workflow{
+			Name: "workflow1",
+			Jobs: map[string]*model.Job{"job1": job},
+		}
+	}
+
+	planFor := func(wf *model.Workflow) *model.Plan {
+		return &model.Plan{Stages: []*model.Stage{{Runs: []*model.Run{{Workflow: wf, JobID: "job1"}}}}}
+	}
+
+	ctx := context.Background()
+
+	// fail drives a single matrix combination through the failure path; each
+	// RunContext is its own jobInfo (rc implements jobInfo) and shares the job.
+	fail := func(wf *model.Workflow, experimental bool) {
+		rc := newTestRC(wf, map[string]any{"experimental": experimental})
+		setJobResult(ctx, rc, rc, false)
+	}
+
+	t.Run("one tolerated and one firm failure fails the run", func(t *testing.T) {
+		job, wf := newSharedJob(t)
+		// Order is intentional: the tolerated combination finishes first, then the
+		// firm one. The firm-failure latch must still win regardless of order.
+		fail(wf, true)
+		fail(wf, false)
+
+		assert.Equal(t, "failure", job.Result)
+		assert.False(t, job.ContinueOnError, "a single firm failure must make the whole job firm")
+		assert.Error(t, handleFailure(planFor(wf))(ctx))
+	})
+
+	t.Run("all tolerated failures do not fail the run", func(t *testing.T) {
+		job, wf := newSharedJob(t)
+		fail(wf, true)
+		fail(wf, true)
+
+		assert.Equal(t, "failure", job.Result)
+		assert.True(t, job.ContinueOnError, "every failing combination was tolerated")
+		assert.NoError(t, handleFailure(planFor(wf))(ctx))
+	})
+}
+
+func TestHasJobSummaryCapability(t *testing.T) {
+	assert.True(t, hasJobSummaryCapability("cache,job-summary artifacts"))
+	assert.True(t, hasJobSummaryCapability("cache,\njob-summary\tartifacts"))
+	assert.False(t, hasJobSummaryCapability("not-job-summary,job-summary-v2"))
+}
+
+// fakeRuntimeToken builds a JWT-shaped string whose middle (claims) segment encodes
+// the given JobID. The header and signature segments are filler — the runner does not
+// verify the signature; the server does.
+func fakeRuntimeToken(jobID int64) string {
+	header := base64.RawURLEncoding.EncodeToString([]byte(`{"alg":"HS256","typ":"JWT"}`))
+	claims := base64.RawURLEncoding.EncodeToString(fmt.Appendf(nil, `{"JobID":%d}`, jobID))
+	sig := base64.RawURLEncoding.EncodeToString([]byte("sig"))
+	return header + "." + claims + "." + sig
+}
+
+func newJobSummaryRC(env map[string]string, jobContainer container.ExecutionsEnvironment, stepCount int) *RunContext {
+	steps := make([]*model.Step, stepCount)
+	for i := range steps {
+		steps[i] = &model.Step{ID: strconv.Itoa(i)}
+	}
+	return &RunContext{
+		Config:       &Config{},
+		JobContainer: jobContainer,
+		Env:          env,
+		Run: &model.Run{
+			JobID: "test",
+			Workflow: &model.Workflow{
+				Jobs: map[string]*model.Job{
+					"test": {Steps: steps},
+				},
+			},
+		},
+	}
+}
+
+func TestTryUploadJobSummaryRetriesTransientFailure(t *testing.T) {
+	oldDelay := jobSummaryUploadRetryDelay
+	jobSummaryUploadRetryDelay = 0
+	defer func() {
+		jobSummaryUploadRetryDelay = oldDelay
+	}()
+
+	runtimeToken := fakeRuntimeToken(34)
+
+	requests := 0
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requests++
+		assert.Equal(t, http.MethodPut, r.Method)
+		assert.Equal(t, "/_apis/pipelines/workflows/12/jobs/34/steps/0/summary", r.URL.Path)
+		assert.Equal(t, "Bearer "+runtimeToken, r.Header.Get("Authorization"))
+		assert.Equal(t, "text/markdown; charset=utf-8", r.Header.Get("Content-Type"))
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
+		assert.Equal(t, []byte("# summary"), body)
+		if requests == 1 {
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	ctx := context.Background()
+	cm := &containerMock{}
+	cm.On("GetContainerArchive", mock.Anything, "/var/run/act/workflow/step-summary-0.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "step-summary-0.md", body: "# summary"}))),
+		nil,
+	).Once()
+
+	rc := newJobSummaryRC(map[string]string{
+		"GITEA_ACTIONS_CAPABILITIES": "cache, job-summary",
+		"ACTIONS_RUNTIME_URL":        server.URL,
+		"ACTIONS_RUNTIME_TOKEN":      runtimeToken,
+		"GITEA_RUN_ID":               "12",
+	}, cm, 1)
+
+	tryUploadJobSummary(ctx, rc)
+
+	assert.Equal(t, 2, requests)
+	cm.AssertExpectations(t)
+}
+
+func TestTryUploadJobSummaryStopsAtPhaseTimeout(t *testing.T) {
+	oldPhase := jobSummaryUploadPhaseTimeout
+	jobSummaryUploadPhaseTimeout = 100 * time.Millisecond
+	defer func() {
+		jobSummaryUploadPhaseTimeout = oldPhase
+	}()
+
+	runtimeToken := fakeRuntimeToken(34)
+
+	// The server blocks until either the request context is cancelled (the behaviour
+	// under test: the phase timeout aborts the in-flight upload) or the test tears it
+	// down. Without the phase timeout the upload would hang until the 30s client
+	// timeout instead of releasing the cleanup budget. The release channel guarantees
+	// the handler always returns so server.Close() cannot itself hang.
+	release := make(chan struct{})
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		select {
+		case <-r.Context().Done():
+		case <-release:
+		}
+	}))
+	defer server.Close()
+	defer close(release)
+
+	ctx := context.Background()
+	cm := &containerMock{}
+	cm.On("GetContainerArchive", mock.Anything, "/var/run/act/workflow/step-summary-0.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "step-summary-0.md", body: "# summary"}))),
+		nil,
+	).Once()
+
+	rc := newJobSummaryRC(map[string]string{
+		"GITEA_ACTIONS_CAPABILITIES": "job-summary",
+		"ACTIONS_RUNTIME_URL":        server.URL,
+		"ACTIONS_RUNTIME_TOKEN":      runtimeToken,
+		"GITEA_RUN_ID":               "12",
+	}, cm, 1)
+
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		tryUploadJobSummary(ctx, rc)
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(5 * time.Second):
+		t.Fatal("tryUploadJobSummary did not honour the phase timeout")
+	}
+	cm.AssertExpectations(t)
+}
+
+func TestTryUploadJobSummaryUploadsEachStepIndependently(t *testing.T) {
+	runtimeToken := fakeRuntimeToken(34)
+
+	type upload struct {
+		path string
+		body string
+	}
+	var got []upload
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
+		got = append(got, upload{r.URL.Path, string(body)})
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	ctx := context.Background()
+	cm := &containerMock{}
+	// Three steps: 0 has content, 1 has empty content (skipped), 2 has content.
+	cm.On("GetContainerArchive", mock.Anything, "/var/run/act/workflow/step-summary-0.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "step-summary-0.md", body: "first"}))),
+		nil,
+	).Once()
+	cm.On("GetContainerArchive", mock.Anything, "/var/run/act/workflow/step-summary-1.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "step-summary-1.md", body: ""}))),
+		nil,
+	).Once()
+	cm.On("GetContainerArchive", mock.Anything, "/var/run/act/workflow/step-summary-2.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "step-summary-2.md", body: "third"}))),
+		nil,
+	).Once()
+
+	rc := newJobSummaryRC(map[string]string{
+		"GITEA_ACTIONS_CAPABILITIES": "job-summary",
+		"ACTIONS_RUNTIME_URL":        server.URL,
+		"ACTIONS_RUNTIME_TOKEN":      runtimeToken,
+		"GITEA_RUN_ID":               "12",
+	}, cm, 3)
+
+	tryUploadJobSummary(ctx, rc)
+
+	assert.Equal(t, []upload{
+		{"/_apis/pipelines/workflows/12/jobs/34/steps/0/summary", "first"},
+		{"/_apis/pipelines/workflows/12/jobs/34/steps/2/summary", "third"},
+	}, got)
+	cm.AssertExpectations(t)
+}
+
+func TestTryUploadJobSummaryRequiresExactCapability(t *testing.T) {
+	requests := 0
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requests++
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	rc := newJobSummaryRC(map[string]string{
+		"GITEA_ACTIONS_CAPABILITIES": "not-job-summary,job-summary-v2",
+		"ACTIONS_RUNTIME_URL":        server.URL,
+		"ACTIONS_RUNTIME_TOKEN":      fakeRuntimeToken(34),
+		"GITEA_RUN_ID":               "12",
+	}, &containerMock{}, 1)
+
+	tryUploadJobSummary(context.Background(), rc)
+
+	assert.Equal(t, 0, requests)
+}
+
+func TestTryUploadJobSummarySkipsWhenJobIDMissingFromToken(t *testing.T) {
+	requests := 0
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requests++
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	rc := newJobSummaryRC(map[string]string{
+		"GITEA_ACTIONS_CAPABILITIES": "job-summary",
+		"ACTIONS_RUNTIME_URL":        server.URL,
+		"ACTIONS_RUNTIME_TOKEN":      "not-a-jwt",
+		"GITEA_RUN_ID":               "12",
+	}, &containerMock{}, 1)
+
+	tryUploadJobSummary(context.Background(), rc)
+
+	assert.Equal(t, 0, requests)
+}
+
+func TestExtractJobIDFromRuntimeToken(t *testing.T) {
+	assert.Equal(t, int64(42), extractJobIDFromRuntimeToken(fakeRuntimeToken(42)))
+	assert.Equal(t, int64(0), extractJobIDFromRuntimeToken("not-a-jwt"))
+	assert.Equal(t, int64(0), extractJobIDFromRuntimeToken("a.b.c"))
+	assert.Equal(t, int64(0), extractJobIDFromRuntimeToken(""))
+}
+
+func TestReadSingleFileFromContainerArchiveFindsMatchingRegularFile(t *testing.T) {
+	ctx := context.Background()
+	cm := &containerMock{}
+	cm.On("GetContainerArchive", ctx, "/var/run/act/workflow/SUMMARY.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t,
+			tarEntry{name: "workflow", typeflag: tar.TypeDir},
+			tarEntry{name: "other.md", body: "wrong"},
+			tarEntry{name: "SUMMARY.md", body: "right"},
+		))),
+		nil,
+	).Once()
+
+	body, ok := readSingleFileFromContainerArchive(ctx, cm, "/var/run/act/workflow/SUMMARY.md", 1024)
+
+	assert.True(t, ok)
+	assert.Equal(t, []byte("right"), body)
+	cm.AssertExpectations(t)
+}
+
+func TestReadSingleFileFromContainerArchiveTruncatesWhenTooLarge(t *testing.T) {
+	logger, hook := logrustest.NewNullLogger()
+	ctx := common.WithLogger(context.Background(), logger)
+	cm := &containerMock{}
+	content := strings.Repeat("a", 300)
+	cm.On("GetContainerArchive", ctx, "/var/run/act/workflow/SUMMARY.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "SUMMARY.md", body: content}))),
+		nil,
+	).Once()
+
+	const maxBytes = 200
+	body, ok := readSingleFileFromContainerArchive(ctx, cm, "/var/run/act/workflow/SUMMARY.md", maxBytes)
+
+	// Oversized summaries are truncated to the limit (reserving room for the marker)
+	// rather than dropped entirely, and the truncation marker is appended.
+	assert.True(t, ok)
+	assert.LessOrEqual(t, len(body), maxBytes)
+	keep := maxBytes - len(jobSummaryTruncationMarker)
+	assert.Equal(t, []byte(content[:keep]+jobSummaryTruncationMarker), body)
+	if assert.Len(t, hook.Entries, 1) {
+		assert.Contains(t, hook.Entries[0].Message, "job summary truncated")
+	}
+	cm.AssertExpectations(t)
+}
+
+func TestReadSingleFileFromContainerArchiveKeepsExactLimitWithoutWarning(t *testing.T) {
+	logger, hook := logrustest.NewNullLogger()
+	ctx := common.WithLogger(context.Background(), logger)
+	cm := &containerMock{}
+	cm.On("GetContainerArchive", ctx, "/var/run/act/workflow/SUMMARY.md").Return(
+		io.NopCloser(bytes.NewReader(tarArchive(t, tarEntry{name: "SUMMARY.md", body: "abc"}))),
+		nil,
+	).Once()
+
+	body, ok := readSingleFileFromContainerArchive(ctx, cm, "/var/run/act/workflow/SUMMARY.md", 3)
+
+	// A summary that is exactly at the limit is kept whole and not flagged as truncated.
+	assert.True(t, ok)
+	assert.Equal(t, []byte("abc"), body)
+	assert.Empty(t, hook.Entries)
+	cm.AssertExpectations(t)
+}
+
+type tarEntry struct {
+	name     string
+	body     string
+	typeflag byte
+}
+
+func tarArchive(t *testing.T, entries ...tarEntry) []byte {
+	t.Helper()
+
+	buf := &bytes.Buffer{}
+	tw := tar.NewWriter(buf)
+	for _, entry := range entries {
+		typeflag := entry.typeflag
+		if typeflag == 0 {
+			typeflag = tar.TypeReg
+		}
+		header := &tar.Header{
+			Name:     entry.name,
+			Typeflag: typeflag,
+			Mode:     0o644,
+			Size:     int64(len(entry.body)),
+		}
+		if typeflag == tar.TypeDir {
+			header.Mode = 0o755
+			header.Size = 0
+		}
+		require.NoError(t, tw.WriteHeader(header))
+		if typeflag == tar.TypeReg {
+			_, err := tw.Write([]byte(entry.body))
+			require.NoError(t, err)
+		}
+	}
+	require.NoError(t, tw.Close())
+	return buf.Bytes()
+}
+
+func newTestRC(wf *model.Workflow, matrix map[string]any) *RunContext {
+	return &RunContext{
+		Config: &Config{
+			Workdir: ".",
+			Platforms: map[string]string{
+				"ubuntu-latest": "ubuntu-latest",
+			},
+		},
+		StepResults: map[string]*model.StepResult{},
+		Env:         map[string]string{},
+		Matrix:      matrix,
+		Run:         &model.Run{JobID: "job1", Workflow: wf},
+	}
+}
+
+func makeTestRC(t *testing.T, jobYAML string) *RunContext {
+	t.Helper()
+	var job *model.Job
+	require.NoError(t, yaml.Unmarshal([]byte(jobYAML), &job))
+	rc := newTestRC(&model.Workflow{
+		Name: "workflow1",
+		Jobs: map[string]*model.Job{"job1": job},
+	}, nil)
+	rc.ExprEval = rc.NewExpressionEvaluator(context.Background())
+	return rc
+}
+
+func TestApplyJobTimeout(t *testing.T) {
+	cases := []struct {
+		name        string
+		yaml        string
+		wantTimeout bool
+	}{
+		{"empty", "runs-on: ubuntu-latest", false},
+		{"integer", "timeout-minutes: 5\nruns-on: ubuntu-latest", true},
+		{"non-numeric ignored", "timeout-minutes: abc\nruns-on: ubuntu-latest", false},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			rc := makeTestRC(t, tc.yaml)
+			ctx := context.Background()
+			newCtx, cancel := applyJobTimeout(ctx, rc, rc.Run.Job())
+			defer cancel()
+			_, hasDeadline := newCtx.Deadline()
+			assert.Equal(t, tc.wantTimeout, hasDeadline)
+		})
+	}
+}
+
+func TestEvaluateJobContinueOnError(t *testing.T) {
+	cases := []struct {
+		name string
+		yaml string
+		want bool
+	}{
+		{"absent", "runs-on: ubuntu-latest", false},
+		{"true", "continue-on-error: true\nruns-on: ubuntu-latest", true},
+		{"false", "continue-on-error: false\nruns-on: ubuntu-latest", false},
+		{"expression true", "continue-on-error: ${{ 'x' == 'x' }}\nruns-on: ubuntu-latest", true},
+		{"expression false", "continue-on-error: ${{ 'x' != 'x' }}\nruns-on: ubuntu-latest", false},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			rc := makeTestRC(t, tc.yaml)
+			got := evaluateJobContinueOnError(context.Background(), rc, rc.Run.Job())
+			assert.Equal(t, tc.want, got)
+		})
+	}
+}
+
+func TestJobSetContinueOnError(t *testing.T) {
+	t.Run("first call true", func(t *testing.T) {
+		j := &model.Job{}
+		j.SetContinueOnError(true)
+		assert.True(t, j.ContinueOnError)
+	})
+	t.Run("first call false", func(t *testing.T) {
+		j := &model.Job{}
+		j.SetContinueOnError(false)
+		assert.False(t, j.ContinueOnError)
+	})
+	t.Run("true then false locks to false", func(t *testing.T) {
+		j := &model.Job{}
+		j.SetContinueOnError(true)
+		j.SetContinueOnError(false)
+		assert.False(t, j.ContinueOnError)
+	})
+	t.Run("false then true stays false", func(t *testing.T) {
+		j := &model.Job{}
+		j.SetContinueOnError(false)
+		j.SetContinueOnError(true)
+		assert.False(t, j.ContinueOnError)
+	})
+	t.Run("true then true stays true", func(t *testing.T) {
+		j := &model.Job{}
+		j.SetContinueOnError(true)
+		j.SetContinueOnError(true)
+		assert.True(t, j.ContinueOnError)
+	})
+}

act/runner/job_hooks.go

@@ -0,0 +1,115 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"cmp"
+	"context"
+	"fmt"
+	"maps"
+	"path"
+	"strings"
+
+	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/container"
+)
+
+// GitHub's job-hook variables, read as a fallback when the settings are unset.
+const (
+	jobStartedHookEnv   = "ACTIONS_RUNNER_HOOK_JOB_STARTED"
+	jobCompletedHookEnv = "ACTIONS_RUNNER_HOOK_JOB_COMPLETED"
+)
+
+// Kept apart from the per-step file-command files, which are truncated on every step.
+const (
+	hookEnvFileCommand  = "workflow/hook-envs.txt"
+	hookPathFileCommand = "workflow/hook-path.txt"
+)
+
+func (rc *RunContext) runJobStartedHook(ctx context.Context) error {
+	return rc.runJobHook(ctx, cmp.Or(rc.Config.JobStartedHook, rc.Config.Env[jobStartedHookEnv]), "job started")
+}
+
+func (rc *RunContext) runJobCompletedHook(ctx context.Context) error {
+	return rc.runJobHook(ctx, cmp.Or(rc.Config.JobCompletedHook, rc.Config.Env[jobCompletedHookEnv]), "job completed")
+}
+
+// runJobHook runs one hook in the job environment. Either hook failing fails the job, as
+// on GitHub, where the operator is responsible for the hook's own resilience.
+func (rc *RunContext) runJobHook(ctx context.Context, hookPath, name string) error {
+	if hookPath == "" {
+		return nil
+	}
+
+	cmd, shell := hookCommand(hookPath)
+	rawLogger := common.Logger(ctx).WithField(rawOutputField, true)
+	defer rawLogger.Infof("::endgroup::")
+	rawLogger.Infof("::group::Run '%s'", escapeCommandData(hookPath))
+	rawLogger.Infof("A %s hook has been configured by the runner administrator", name)
+	if shell != "" {
+		rawLogger.Infof("shell: %s", shell)
+	}
+
+	env := maps.Clone(rc.GetEnv())
+	if jobContainer := rc.Run.Job().Container(); jobContainer != nil {
+		maps.Copy(env, jobContainer.Env)
+	}
+	rc.withGithubEnv(ctx, rc.getGithubContext(ctx), env)
+	rc.ApplyExtraPath(ctx, &env)
+
+	err := rc.setupHookFileCommands(ctx, env)
+	if err == nil {
+		err = rc.JobContainer.Exec(cmd, env, "", "")(ctx)
+	}
+	// Processed even on failure, so a hook that exports what it managed to set up before
+	// failing still hands it to the job.
+	err = cmp.Or(err, rc.processHookFileCommands(ctx))
+	if err == nil {
+		return nil
+	}
+
+	err = fmt.Errorf("the %s hook %q failed: %w", name, hookPath, err)
+	// Flip the job status the way a failing pre step does, so success()-default main steps
+	// skip and the task is reported failed.
+	reportStepError(ctx, rc, err)
+	return err
+}
+
+// setupHookFileCommands points the hook at its GITHUB_ENV and GITHUB_PATH files, so it can
+// export to the job's steps, and truncates them so the second hook does not re-read what
+// the first one wrote.
+func (rc *RunContext) setupHookFileCommands(ctx context.Context, env map[string]string) error {
+	actPath := rc.JobContainer.GetActPath()
+	env["GITHUB_ENV"] = path.Join(actPath, hookEnvFileCommand)
+	env["GITHUB_PATH"] = path.Join(actPath, hookPathFileCommand)
+	env["GITEA_ENV"] = env["GITHUB_ENV"]
+	env["GITEA_PATH"] = env["GITHUB_PATH"]
+
+	return rc.JobContainer.Copy(actPath,
+		&container.FileEntry{Name: hookEnvFileCommand, Mode: 0o666},
+		&container.FileEntry{Name: hookPathFileCommand, Mode: 0o666},
+	)(ctx)
+}
+
+func (rc *RunContext) processHookFileCommands(ctx context.Context) error {
+	if err := processRunnerEnvFileCommand(ctx, hookEnvFileCommand, rc, rc.setEnv); err != nil {
+		return err
+	}
+	return rc.UpdateExtraPath(ctx, path.Join(rc.JobContainer.GetActPath(), hookPathFileCommand))
+}
+
+// hookCommand mirrors actions/runner, which deliberately does not apply the shell flags it
+// gives `run:` steps — a hook sets its own. See docs/adrs/1751-runner-job-hooks.md there.
+// The second return value is how the invocation is shown in the log, empty when the file is
+// executed directly.
+func hookCommand(hookPath string) (cmd []string, shell string) {
+	switch strings.ToLower(path.Ext(hookPath)) {
+	case ".sh":
+		return []string{"bash", "-e", hookPath}, "bash -e {0}"
+	case ".ps1":
+		return []string{"pwsh", "-command", ". '" + hookPath + "'"}, `pwsh -command ". '{0}'"`
+	default:
+		return []string{hookPath}, ""
+	}
+}

act/runner/job_hooks_test.go

@@ -0,0 +1,162 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"maps"
+	"testing"
+
+	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/model"
+
+	"github.com/sirupsen/logrus/hooks/test"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// hookContainer records the command a hook was run with and answers with what the hook
+// wrote to its GITHUB_ENV and GITHUB_PATH files.
+type hookContainer struct {
+	fakeContainer
+	cmd     []string
+	env     map[string]string
+	err     error
+	envFile map[string]string
+	pathTar []byte
+}
+
+func (c *hookContainer) ToContainerPath(path string) string { return path }
+func (c *hookContainer) IsEnvironmentCaseInsensitive() bool { return false }
+
+func (c *hookContainer) GetRunnerContext(context.Context) map[string]any {
+	return map[string]any{"os": "Linux"}
+}
+
+func (c *hookContainer) Exec(command []string, env map[string]string, _, _ string) common.Executor {
+	return func(context.Context) error {
+		c.cmd, c.env = command, env
+		return c.err
+	}
+}
+
+func (c *hookContainer) UpdateFromEnv(_ string, env *map[string]string) common.Executor {
+	return func(context.Context) error {
+		maps.Copy(*env, c.envFile)
+		return nil
+	}
+}
+
+func (c *hookContainer) GetContainerArchive(context.Context, string) (io.ReadCloser, error) {
+	return io.NopCloser(bytes.NewReader(c.pathTar)), nil
+}
+
+// newHookRunContext returns a RunContext and the context to run a hook with, whose logger is
+// silenced so the hook's job-log output does not reach the test output.
+func newHookRunContext(jobContainer *hookContainer, config *Config) (*RunContext, context.Context) {
+	// Env is left nil so that it is built from the config, as it is for a real job.
+	rc := &RunContext{
+		Config:       config,
+		Run:          &model.Run{JobID: "job", Workflow: &model.Workflow{Jobs: map[string]*model.Job{"job": {}}}},
+		JobContainer: jobContainer,
+	}
+	logger, _ := test.NewNullLogger()
+	ctx := common.WithJobErrorContainer(common.WithLogger(context.Background(), logger.WithField("test", true)))
+	rc.ExprEval = rc.NewExpressionEvaluator(ctx)
+	return rc, ctx
+}
+
+func TestRunJobHook(t *testing.T) {
+	t.Run("runs the hook with the job environment", func(t *testing.T) {
+		jobContainer := &hookContainer{}
+		rc, ctx := newHookRunContext(jobContainer, &Config{
+			JobStartedHook: "/hooks/started.sh",
+			Env:            map[string]string{"A_VAR": "value", jobStartedHookEnv: "/from/env.sh"},
+		})
+
+		require.NoError(t, rc.runJobStartedHook(ctx))
+
+		// The setting wins over the environment variable.
+		assert.Equal(t, []string{"bash", "-e", "/hooks/started.sh"}, jobContainer.cmd)
+		assert.Equal(t, "value", jobContainer.env["A_VAR"])
+		// The github environment is there too, so a hook can tell which job it runs for.
+		assert.Equal(t, "job", jobContainer.env["GITHUB_JOB"])
+		assert.Equal(t, "/var/run/act/workflow/hook-envs.txt", jobContainer.env["GITHUB_ENV"])
+		assert.Equal(t, "/var/run/act/workflow/hook-path.txt", jobContainer.env["GITHUB_PATH"])
+	})
+
+	// Each hook reads its own variable, so a swapped constant cannot pass.
+	t.Run("falls back to the GitHub environment variables", func(t *testing.T) {
+		for name, hook := range map[string]struct {
+			env string
+			run func(*RunContext, context.Context) error
+		}{
+			"started":   {jobStartedHookEnv, (*RunContext).runJobStartedHook},
+			"completed": {jobCompletedHookEnv, (*RunContext).runJobCompletedHook},
+		} {
+			t.Run(name, func(t *testing.T) {
+				jobContainer := &hookContainer{}
+				rc, ctx := newHookRunContext(jobContainer, &Config{Env: map[string]string{hook.env: "/from/env.sh"}})
+
+				require.NoError(t, hook.run(rc, ctx))
+				assert.Equal(t, []string{"bash", "-e", "/from/env.sh"}, jobContainer.cmd)
+			})
+		}
+	})
+
+	t.Run("exports what the hook wrote to GITHUB_ENV and GITHUB_PATH", func(t *testing.T) {
+		jobContainer := &hookContainer{
+			envFile: map[string]string{"FROM_HOOK": "1"},
+			pathTar: tarArchive(t, tarEntry{name: "hook-path.txt", body: "/opt/tool/bin\n"}),
+		}
+		rc, ctx := newHookRunContext(jobContainer, &Config{JobStartedHook: "/hooks/started.sh"})
+
+		require.NoError(t, rc.runJobStartedHook(ctx))
+
+		assert.Equal(t, "1", rc.Env["FROM_HOOK"])
+		assert.Equal(t, []string{"/opt/tool/bin"}, rc.ExtraPath)
+	})
+
+	t.Run("a failing hook fails the job", func(t *testing.T) {
+		rc, ctx := newHookRunContext(&hookContainer{err: errors.New("boom")}, &Config{JobStartedHook: "/hooks/started.sh"})
+
+		err := rc.runJobStartedHook(ctx)
+
+		require.ErrorContains(t, err, `the job started hook "/hooks/started.sh" failed`)
+		require.ErrorContains(t, err, "boom")
+		// The failure has to flip the job status, or success()-default steps would still
+		// run and the task would be reported successful despite the missing setup.
+		assert.Equal(t, "failure", rc.getJobContext().Status)
+		require.ErrorContains(t, common.JobError(ctx), "boom")
+	})
+
+	t.Run("is a no-op without a hook", func(t *testing.T) {
+		jobContainer := &hookContainer{}
+		rc, ctx := newHookRunContext(jobContainer, &Config{})
+
+		require.NoError(t, rc.runJobStartedHook(ctx))
+		require.NoError(t, rc.runJobCompletedHook(ctx))
+		assert.Nil(t, jobContainer.cmd)
+	})
+}
+
+// actions/runner deliberately runs a hook without the flags it gives `run:` steps, and an
+// executable without a known extension speaks for itself through its shebang.
+func TestHookCommand(t *testing.T) {
+	for hookPath, want := range map[string]struct {
+		cmd   []string
+		shell string
+	}{
+		"/hooks/started.sh":  {[]string{"bash", "-e", "/hooks/started.sh"}, "bash -e {0}"},
+		"/hooks/started.PS1": {[]string{"pwsh", "-command", ". '/hooks/started.PS1'"}, `pwsh -command ". '{0}'"`},
+		"/hooks/started":     {[]string{"/hooks/started"}, ""},
+	} {
+		cmd, shell := hookCommand(hookPath)
+		assert.Equal(t, want.cmd, cmd, hookPath)
+		assert.Equal(t, want.shell, shell, hookPath)
+	}
+}

act/runner/logger.go

@@ -7,9 +7,13 @@ package runner
 import (
 	"bytes"
 	"context"
+	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"io"
+	"net/url"
 	"os"
+	"slices"
 	"strings"
 	"sync"
 
@@ -166,9 +170,130 @@ func withStepLogger(ctx context.Context, stepNumber int, stepID, stepName, stage
 
 type entryProcessor func(entry *logrus.Entry) *logrus.Entry
 
+// secretValueEncoders are the shapes a secret takes on its way into a log: a base64
+// payload, a JSON string, or a URL component. An action that serializes a secret leaks
+// it in one of these forms, which a mask of the verbatim value alone does not catch, so
+// every form is masked as well. This mirrors the value encoders of GitHub's runner.
+var secretValueEncoders = []func(string) string{
+	func(v string) string { return base64.StdEncoding.EncodeToString([]byte(v)) },
+	base64ShiftEncoder(1),
+	base64ShiftEncoder(2),
+	jsonStringEscape,
+	jsonStringEscapeNoHTML,
+	url.QueryEscape,
+	url.PathEscape,
+}
+
+// minShiftedBase64Len is the shortest shifted base64 fragment worth masking. A shorter
+// one carries too few bytes of the secret to identify it and would mask unrelated output.
+const minShiftedBase64Len = 8
+
+// base64ShiftEncoder returns the part of a secret's base64 form that survives when the
+// secret does not start on a 3-byte boundary of the payload it is embedded in. base64
+// encodes three bytes at a time, so `Authorization: Basic base64("user:token")` contains
+// the base64 of the token alone only when the prefix length happens to be a multiple of
+// three; at the other two alignments the encoding of the whole value differs. Encoding
+// the secret behind shift filler bytes reproduces those alignments, which is what the
+// Base64StringEscapeShift1/2 encoders of GitHub's runner do.
+//
+// The leading group (filler mixed with the secret's first bytes) and the trailing group
+// (padded here, but continuing into whatever follows the secret) are dropped, leaving the
+// group-aligned middle that does appear verbatim in the log.
+func base64ShiftEncoder(shift int) func(string) string {
+	return func(v string) string {
+		buf := make([]byte, shift+len(v))
+		copy(buf[shift:], v)
+		encoded := base64.StdEncoding.EncodeToString(buf)
+		// Keep only the aligned middle, and only when enough of it is left to be a
+		// distinctive pattern rather than a fragment that matches unrelated output.
+		if len(encoded) < 8+minShiftedBase64Len {
+			return ""
+		}
+		return encoded[4 : len(encoded)-4]
+	}
+}
+
+// jsonStringEscape returns v as it appears inside a JSON string, without the quotes,
+// which is what `toJSON(secrets)` or any action logging a JSON body produces. Go's encoder
+// escapes <, >, & (as act's own toJSON does); the non-HTML variant below covers the runtimes
+// that do not. When v has none of those characters both forms are equal and deduplicated.
+func jsonStringEscape(v string) string {
+	encoded, err := json.Marshal(v)
+	if err != nil {
+		return v
+	}
+	return string(encoded[1 : len(encoded)-1])
+}
+
+// jsonStringEscapeNoHTML is jsonStringEscape without HTML escaping, matching the JSON a
+// JavaScript (JSON.stringify) or .NET action emits, so a secret containing < > or & is
+// masked in that form too.
+func jsonStringEscapeNoHTML(v string) string {
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(v); err != nil {
+		return v
+	}
+	// Encode appends a newline; drop it along with the surrounding quotes.
+	encoded := strings.TrimRight(buf.String(), "\n")
+	return encoded[1 : len(encoded)-1]
+}
+
+func AppendSecretMasker(oldnew []string, v string) []string {
+	ret := oldnew
+
+	for l := range strings.SplitSeq(v, "\n") {
+		tm := strings.TrimSpace(l)
+		// formatted JSON secrets could otherwise mask {,[,],} everywhere
+		if len(tm) > 1 {
+			ret = append(ret, tm, "***")
+			// command data reaches the log escaped, so "pass%word" also arrives as "pass%25word"
+			if strings.ContainsAny(tm, "%\r\n") {
+				ret = append(ret, escapeCommandData(tm), "***")
+			}
+		}
+	}
+
+	// The encoded forms are derived from the whole value: a multi-line secret is
+	// encoded as one string, not line by line.
+	trimmed := strings.TrimSpace(v)
+	if len(trimmed) <= 1 {
+		return ret
+	}
+	for _, encode := range secretValueEncoders {
+		encoded := encode(trimmed)
+		// An encoding that leaves the value unchanged is already masked above.
+		if encoded == trimmed || len(encoded) <= 1 || slices.Contains(ret, encoded) {
+			continue
+		}
+		ret = append(ret, encoded, "***")
+	}
+
+	return ret
+}
+
 // valueMasker applies secrets and ::add-mask:: patterns to every log entry, including
 // raw_output (command/stream) lines; there is no bypass by field.
 func valueMasker(insecureSecrets bool, secrets map[string]string) entryProcessor {
+	var oldnew []string
+	for _, v := range secrets {
+		oldnew = AppendSecretMasker(oldnew, v)
+	}
+	oldnew = slices.Clip(oldnew)
+	defReplacer := strings.NewReplacer(oldnew...)
+
+	// A ::add-mask:: only ever appends to the job's mask slice, so the replacer built for
+	// it stays valid until the slice grows. Cache it, keyed by the slice itself and its
+	// length, instead of encoding every secret and mask again for each log line.
+	var (
+		mu       sync.Mutex
+		masksRef *[]string
+		pairs    []string
+		masked   int
+		replacer *strings.Replacer
+	)
+
 	return func(entry *logrus.Entry) *logrus.Entry {
 		if insecureSecrets {
 			return entry
@@ -176,17 +301,28 @@ func valueMasker(insecureSecrets bool, secrets map[string]string) entryProcessor
 
 		masks := Masks(entry.Context)
 
-		for _, v := range secrets {
-			if v != "" {
-				entry.Message = strings.ReplaceAll(entry.Message, v, "***")
-			}
+		if len(*masks) == 0 {
+			entry.Message = defReplacer.Replace(entry.Message)
+			return entry
 		}
 
-		for _, v := range *masks {
-			if v != "" {
-				entry.Message = strings.ReplaceAll(entry.Message, v, "***")
-			}
+		mu.Lock()
+		// A composite action logs through the same masker with its own mask slice, so a
+		// different slice starts the cache over.
+		if masksRef != masks {
+			masksRef, pairs, masked, replacer = masks, oldnew, 0, nil
 		}
+		if replacer == nil || masked != len(*masks) {
+			for _, v := range (*masks)[masked:] {
+				pairs = AppendSecretMasker(pairs, v)
+			}
+			masked = len(*masks)
+			replacer = strings.NewReplacer(pairs...)
+		}
+		cmasker := replacer
+		mu.Unlock()
+
+		entry.Message = cmasker.Replace(entry.Message)
 
 		return entry
 	}
@@ -209,6 +345,11 @@ type jobLogFormatter struct {
 func (f *jobLogFormatter) Format(entry *logrus.Entry) ([]byte, error) {
 	b := &bytes.Buffer{}
 
+	// the web renderer decodes command data, so this local view has to as well
+	if _, _, _, ok := tryParseRawActionCommand(entry.Message + "\n"); ok {
+		entry.Message = UnescapeCommandData(entry.Message)
+	}
+
 	if f.isColored(entry) {
 		f.printColored(b, entry)
 	} else {

act/runner/logger_test.go

@@ -0,0 +1,206 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"encoding/base64"
+	"io"
+	"net/url"
+	"strings"
+	"testing"
+
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestValueMasker(t *testing.T) {
+	table := []struct {
+		name       string
+		lines      string
+		secrets    map[string]string
+		masks      []string
+		disallowed []string
+	}{
+		{
+			name:  "Multiline Private Key",
+			lines: "cat << EOF > private.key\nPRIVATE_KEY_BEGIN\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\nPRIVATE_KEY_END\nEOF",
+			secrets: map[string]string{
+				"PRIVATE_KEY": "PRIVATE_KEY_BEGIN\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\nPRIVATE_KEY_END",
+			},
+			disallowed: []string{"KEY", "dsdfseffefsefes", "PRIVATE_KEY_END"},
+		},
+		{
+			name:       "Multiline Private Key in masks",
+			lines:      "cat << EOF > private.key\nPRIVATE_KEY_BEGIN\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\nPRIVATE_KEY_END\nEOF",
+			masks:      []string{"PRIVATE_KEY_BEGIN\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\ndsdfseffefsefes\nPRIVATE_KEY_END"},
+			disallowed: []string{"KEY", "dsdfseffefsefes", "PRIVATE_KEY_END"},
+		},
+		{
+			name:       "Secret containing a percent sign",
+			lines:      "##[error]login failed for pass%25word",
+			secrets:    map[string]string{"TOKEN": "pass%word"},
+			disallowed: []string{"pass%25word"},
+		},
+	}
+	for _, entry := range table {
+		t.Run(entry.name, func(t *testing.T) {
+			ctx := WithMasks(t.Context(), &entry.masks)
+			masker := valueMasker(false, entry.secrets)
+			for line := range strings.SplitSeq(entry.lines, "\n") {
+				lentry := masker(&logrus.Entry{
+					Context: ctx,
+					Message: line,
+				})
+				for _, line := range entry.disallowed {
+					assert.NotContains(t, lentry.Message, line)
+				}
+			}
+		})
+	}
+}
+
+// A secret that reaches the log through an encoding — a base64 payload, a JSON body, a
+// URL — must be masked as well: masking only the verbatim value leaks it.
+func TestValueMaskerEncodedSecrets(t *testing.T) {
+	secret := `p@ss w"rd/1`
+	masker := valueMasker(false, map[string]string{"TOKEN": secret})
+
+	for _, tc := range []struct {
+		name string
+		line string
+	}{
+		{"verbatim", "the token is " + secret},
+		{"base64", "Authorization: Basic " + base64.StdEncoding.EncodeToString([]byte(secret))},
+		{"json", `{"token":"` + jsonStringEscape(secret) + `"}`},
+		{"query escaped", "https://example.com/?token=" + url.QueryEscape(secret)},
+		{"path escaped", "https://example.com/" + url.PathEscape(secret) + "/x"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			entry := masker(&logrus.Entry{Context: t.Context(), Message: tc.line})
+
+			assert.Contains(t, entry.Message, "***")
+			assert.NotContains(t, entry.Message, secret)
+			assert.NotContains(t, entry.Message, base64.StdEncoding.EncodeToString([]byte(secret)))
+			assert.NotContains(t, entry.Message, url.QueryEscape(secret))
+		})
+	}
+}
+
+// A secret containing " together with <, > or & serializes to JSON differently depending
+// on the runtime: act's own toJSON (and Go) HTML-escape <>&, while a JavaScript
+// (JSON.stringify) or .NET action leaves them literal. The secret must be masked in either
+// form, so a JS-serialized JSON body does not leak it.
+func TestValueMaskerJSONEscapesBothWays(t *testing.T) {
+	secret := `a"<b>&c`
+	masker := valueMasker(false, map[string]string{"TOKEN": secret})
+
+	for _, tc := range []struct {
+		name string
+		form string
+	}{
+		{"html escaped (act toJSON / Go)", jsonStringEscape(secret)},
+		{"literal (JS JSON.stringify / .NET)", jsonStringEscapeNoHTML(secret)},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			entry := masker(&logrus.Entry{Context: t.Context(), Message: `{"t":"` + tc.form + `"}`})
+
+			assert.Contains(t, entry.Message, "***")
+			assert.NotContains(t, entry.Message, tc.form)
+		})
+	}
+}
+
+// ::add-mask:: values go through the same masker, so they get the same treatment.
+func TestValueMaskerEncodedMasks(t *testing.T) {
+	masks := []string{"s3cr3t value"}
+	masker := valueMasker(false, nil)
+
+	entry := masker(&logrus.Entry{
+		Context: WithMasks(t.Context(), &masks),
+		Message: "encoded: " + base64.StdEncoding.EncodeToString([]byte("s3cr3t value")),
+	})
+
+	assert.Equal(t, "encoded: ***", entry.Message)
+}
+
+// A token in a Basic auth header is base64'd together with the user name, so the token's
+// own base64 only appears when the prefix length is a multiple of three. The other two
+// alignments must be masked as well, or `Authorization: Basic base64("user:token")` leaks
+// the token to anyone who can decode the log.
+func TestValueMaskerBase64Alignments(t *testing.T) {
+	secret := "s3cr3t-token-value"
+	masker := valueMasker(false, map[string]string{"TOKEN": secret})
+
+	// One prefix per alignment: len%3 of 0, 1 and 2.
+	for _, prefix := range []string{"x-access-token:", "user:", "ab:"} {
+		t.Run(prefix, func(t *testing.T) {
+			encoded := base64.StdEncoding.EncodeToString([]byte(prefix + secret))
+			entry := masker(&logrus.Entry{Context: t.Context(), Message: "Authorization: Basic " + encoded})
+
+			assert.Contains(t, entry.Message, "***")
+			// The aligned middle of the secret must be gone, so the payload can no longer be
+			// decoded back into the token.
+			assert.NotEqual(t, "Authorization: Basic "+encoded, entry.Message)
+			decodable := strings.TrimPrefix(entry.Message, "Authorization: Basic ")
+			decoded, err := base64.StdEncoding.DecodeString(decodable)
+			if err == nil {
+				assert.NotContains(t, string(decoded), secret)
+			}
+		})
+	}
+}
+
+// The masker caches its replacer, so it has to notice both a mask appended to the same
+// slice and a composite action logging with a slice of its own.
+func TestValueMaskerCachedReplacerSeesNewMasks(t *testing.T) {
+	masker := valueMasker(false, map[string]string{"TOKEN": "secret-token"})
+	mask := func(masks *[]string, message string) string {
+		return masker(&logrus.Entry{Context: WithMasks(t.Context(), masks), Message: message}).Message
+	}
+
+	job := []string{"first mask"}
+	assert.Equal(t, "a *** and ***", mask(&job, "a first mask and secret-token"))
+
+	// ::add-mask:: appends to the same slice
+	job = append(job, "second mask")
+	assert.Equal(t, "*** and ***", mask(&job, "first mask and second mask"))
+
+	// a composite action brings its own slice
+	composite := []string{"composite mask"}
+	assert.Equal(t, "*** but first mask", mask(&composite, "composite mask but first mask"))
+
+	// and the job's masks still apply once it is back
+	assert.Equal(t, "*** and *** but composite mask", mask(&job, "first mask and second mask but composite mask"))
+}
+
+func TestAppendSecretMaskerSkipsUselessEncodings(t *testing.T) {
+	// A token with no character an escape would touch only gains its base64 forms:
+	// JSON, query and path escaping all leave it unchanged.
+	pairs := AppendSecretMasker(nil, "plaintoken")
+	assert.Equal(t, []string{
+		"plaintoken", "***",
+		base64.StdEncoding.EncodeToString([]byte("plaintoken")), "***",
+		// The two shifted alignments, each without its leading and trailing group.
+		"YWludG9r", "***",
+		"bGFpbnRv", "***",
+	}, pairs)
+
+	// Too short to mask.
+	assert.Empty(t, AppendSecretMasker(nil, "x"))
+}
+
+func TestJobLogFormatterDecodesCommandData(t *testing.T) {
+	logger := logrus.New()
+	logger.Out = io.Discard
+	format := func(message string) string {
+		out, err := (&jobLogFormatter{}).Format(&logrus.Entry{Logger: logger, Message: message, Data: logrus.Fields{rawOutputField: true}})
+		require.NoError(t, err)
+		return string(out)
+	}
+
+	assert.Contains(t, format("##[error]deploy 50%25 traffic"), "##[error]deploy 50% traffic")
+	// a plain line is not command data and keeps its literal escapes
+	assert.Contains(t, format("progress 50%25 done"), "progress 50%25 done")
+}

act/runner/reusable_workflow.go

@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"net/url"
 	"path"
+	"path/filepath"
 	"regexp"
 	"strings"
 
@@ -27,7 +28,9 @@ func newLocalReusableWorkflowExecutor(rc *RunContext) common.Executor {
 		workflowDir = strings.TrimPrefix(workflowDir, "./")
 
 		return common.NewPipelineExecutor(
-			newReusableWorkflowExecutor(rc, workflowDir, fileName),
+			// resolve the local workflow against the workspace root, not the process
+			// working directory, so it is found regardless of where the runner is invoked
+			newReusableWorkflowExecutor(rc, filepath.Join(rc.Config.Workdir, workflowDir), fileName),
 		)
 	}
 
@@ -138,6 +141,7 @@ func cloneRemoteReusableWorkflow(rc *RunContext, cloneURL, ref, targetDirectory,
 			Dir:         targetDirectory,
 			Token:       token,
 			OfflineMode: rc.Config.ActionOfflineMode,
+			Depth:       rc.Config.ActionCloneDepth,
 		})(ctx)
 	}
 }
@@ -284,7 +288,11 @@ func setReusedWorkflowCallerResult(rc *RunContext, runner Runner) common.Executo
 			if rc.caller != nil {
 				rc.caller.setReusedWorkflowJobResult(rc.JobName, reusedWorkflowJobResult)
 			} else {
+				// Serialize this shared Job.Result write against the other matrix combos
+				// and setJobResult (same lockJob key).
+				unlock := lockJob(rc.Run.Job())
 				rc.result(reusedWorkflowJobResult)
+				unlock()
 				logger.WithField("jobResult", reusedWorkflowJobResult).Infof("Job %s", reusedWorkflowJobResultMessage)
 			}
 		}
@@ -297,25 +305,45 @@ func setReusedWorkflowCallerResult(rc *RunContext, runner Runner) common.Executo
 // getGitCloneToken returns GITEA_TOKEN when shouldCloneURLUseToken returns true,
 // otherwise returns an empty string
 func getGitCloneToken(conf *Config, cloneURL string) string {
-	if !shouldCloneURLUseToken(conf.GitHubInstance, cloneURL) {
+	if !shouldCloneURLUseToken(conf.GitHubInstance, conf.trustedActionInstance(), cloneURL) {
 		return ""
 	}
 	return conf.GetToken()
 }
 
 // For Gitea
-// shouldCloneURLUseToken returns true when the following conditions are met:
-// 1. cloneURL is from the same Gitea instance that the runner is registered to
-// 2. the cloneURL does not have basic auth embedded
-func shouldCloneURLUseToken(instanceURL, cloneURL string) bool {
-	u1, err1 := url.Parse(instanceURL)
-	u2, err2 := url.Parse(cloneURL)
-	if err1 != nil || err2 != nil {
-		return false
+// trustedActionInstance returns the self-hosted DEFAULT_ACTIONS_URL host that may carry the
+// task token, or "" when actions resolve to github.com / a GithubMirror (never trusted).
+func (c Config) trustedActionInstance() string {
+	if c.DefaultActionInstanceIsSelfHosted {
+		return c.DefaultActionInstance
 	}
-	if u2.User != nil {
+	return ""
+}
+
+// For Gitea
+// shouldCloneURLUseToken returns true when the following conditions are met:
+//  1. cloneURL's host matches this Gitea instance: either the registered instance
+//     (instanceURL) or, for DEFAULT_ACTIONS_URL=self on a different hostname, the
+//     self-hosted action instance (trustedActionInstance, "" when not trusted)
+//  2. the cloneURL does not have basic auth embedded
+func shouldCloneURLUseToken(instanceURL, trustedActionInstance, cloneURL string) bool {
+	u2, err := url.Parse(cloneURL)
+	if err != nil || u2.User != nil {
 		return false
 	}
 
-	return u1.Host == u2.Host
+	for _, candidate := range []string{instanceURL, trustedActionInstance} {
+		if candidate == "" {
+			continue
+		}
+		if !strings.HasPrefix(candidate, "http://") &&
+			!strings.HasPrefix(candidate, "https://") {
+			candidate = "https://" + candidate
+		}
+		if u1, err := url.Parse(candidate); err == nil && u1.Host == u2.Host {
+			return true
+		}
+	}
+	return false
 }

act/runner/reusable_workflow_test.go

@@ -123,6 +123,109 @@ func TestNewReusableWorkflowExecutorHoldsCloneLock(t *testing.T) {
 	}
 }
 
+func TestGetGitCloneTokenWithSchemalessGiteaInstance(t *testing.T) {
+	conf := &Config{
+		GitHubInstance: "gitea.example.net",
+		Secrets: map[string]string{
+			"GITEA_TOKEN": "token-value",
+		},
+	}
+
+	token := getGitCloneToken(conf, "https://gitea.example.net/actions/tools")
+
+	require.Equal(t, "token-value", token)
+}
+
+func TestGetGitCloneTokenSelfHostedActionsDifferentHost(t *testing.T) {
+	// The runner registered with one hostname while DEFAULT_ACTIONS_URL=self resolves
+	// actions against AppURL on a different hostname for the same instance.
+	conf := &Config{
+		GitHubInstance:                    "gitea.local",
+		DefaultActionInstance:             "https://gitea.my-nas.lan",
+		DefaultActionInstanceIsSelfHosted: true,
+		Secrets: map[string]string{
+			"GITEA_TOKEN": "token-value",
+		},
+	}
+
+	token := getGitCloneToken(conf, "https://gitea.my-nas.lan/owner/action")
+
+	require.Equal(t, "token-value", token)
+}
+
+func TestShouldCloneURLUseToken(t *testing.T) {
+	tests := []struct {
+		name                  string
+		instanceURL           string
+		trustedActionInstance string
+		cloneURL              string
+		want                  bool
+	}{
+		{
+			name:        "same host with schemaless instance",
+			instanceURL: "gitea.example.net",
+			cloneURL:    "https://gitea.example.net/actions/tools",
+			want:        true,
+		},
+		{
+			name:        "same host with schemaless instance and port",
+			instanceURL: "gitea.example.net:3000",
+			cloneURL:    "https://gitea.example.net:3000/actions/tools",
+			want:        true,
+		},
+		{
+			name:        "different host",
+			instanceURL: "gitea.example.net",
+			cloneURL:    "https://github.com/actions/tools",
+			want:        false,
+		},
+		{
+			name:        "embedded basic auth",
+			instanceURL: "gitea.example.net",
+			cloneURL:    "https://user:pass@gitea.example.net/actions/tools",
+			want:        false,
+		},
+		{
+			name:        "invalid clone URL",
+			instanceURL: "gitea.example.net",
+			cloneURL:    "://gitea.example.net/actions/tools",
+			want:        false,
+		},
+		{
+			// self-hosted DEFAULT_ACTIONS_URL on a different hostname than the
+			// registered instance: the token must still be attached.
+			name:                  "self-hosted action instance on different host",
+			instanceURL:           "gitea.local",
+			trustedActionInstance: "https://gitea.my-nas.lan",
+			cloneURL:              "https://gitea.my-nas.lan/owner/action",
+			want:                  true,
+		},
+		{
+			// embedded basic auth must still be rejected even when the host matches
+			// the trusted action instance.
+			name:                  "self-hosted action instance with embedded basic auth",
+			instanceURL:           "gitea.local",
+			trustedActionInstance: "https://gitea.my-nas.lan",
+			cloneURL:              "https://user:pass@gitea.my-nas.lan/owner/action",
+			want:                  false,
+		},
+		{
+			// github.com / mirror hosts are never trusted: trustedActionInstance is
+			// empty in github mode, so an off-instance clone URL gets no token.
+			name:        "github mode does not trust mirror host",
+			instanceURL: "gitea.local",
+			cloneURL:    "https://mirror.example.com/owner/action",
+			want:        false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			require.Equal(t, tt.want, shouldCloneURLUseToken(tt.instanceURL, tt.trustedActionInstance, tt.cloneURL))
+		})
+	}
+}
+
 func gitMust(t *testing.T, dir string, args ...string) {
 	t.Helper()
 	cmd := exec.Command("git", args...)

act/runner/run_context.go

@@ -20,6 +20,7 @@ import (
 	"path/filepath"
 	"regexp"
 	"runtime"
+	"slices"
 	"strings"
 	"time"
 
@@ -27,22 +28,29 @@ import (
 	"gitea.com/gitea/runner/act/container"
 	"gitea.com/gitea/runner/act/exprparser"
 	"gitea.com/gitea/runner/act/model"
+	"gitea.com/gitea/runner/internal/pkg/lock"
 
+	"github.com/docker/cli/cli/compose/loader"
 	"github.com/docker/go-connections/nat"
+	"github.com/moby/moby/api/types/mount"
 	"github.com/opencontainers/selinux/go-selinux"
 )
 
 // RunContext contains info about current job
 type RunContext struct {
-	Name                string
-	Config              *Config
-	Matrix              map[string]any
-	Run                 *model.Run
-	EventJSON           string
-	Env                 map[string]string
-	GlobalEnv           map[string]string // to pass env changes of GITHUB_ENV and set-env correctly, due to dirty Env field
-	ExtraPath           []string
-	CurrentStep         string
+	Name        string
+	Config      *Config
+	Matrix      map[string]any
+	Run         *model.Run
+	EventJSON   string
+	Env         map[string]string
+	GlobalEnv   map[string]string // to pass env changes of GITHUB_ENV and set-env correctly, due to dirty Env field
+	ExtraPath   []string
+	CurrentStep string
+	// CurrentStepIndex is the index of the top-level job step currently executing
+	// (model.Step.Number). Composite sub-steps inherit the outer step's index by
+	// walking the Parent chain; see topLevelRunContext.
+	CurrentStepIndex    int
 	StepResults         map[string]*model.StepResult
 	IntraActionState    map[string]map[string]string
 	ExprEval            ExpressionEvaluator
@@ -55,6 +63,51 @@ type RunContext struct {
 	Masks               []string
 	cleanUpJobContainer common.Executor
 	caller              *caller // job calling this RunContext (reusable workflows)
+	// summaryFileInitialized tracks which per-step summary files (workflow/step-summary-N.md)
+	// have already been created on the JobContainer. The runner sets up file-command files
+	// via JobContainer.Copy at the start of every phase, which truncates them — fine for
+	// GITHUB_ENV/OUTPUT/STATE/PATH (consumed per phase) but wrong for GITHUB_STEP_SUMMARY,
+	// which has accumulating semantics. We initialize each step's summary file exactly once
+	// so writes from later phases and from composite sub-steps append to the same file.
+	// Only populated on the top-level RunContext; child RCs walk Parent via topLevelRunContext.
+	summaryFileInitialized map[int]bool
+	// outputTemplate is this combination's pristine snapshot of the job's output expressions,
+	// captured before execution so each matrix combo interpolates from the originals rather
+	// than from a sibling's already-resolved values written into the shared Job.Outputs.
+	outputTemplate map[string]string
+	// jobCancelled records that this job's run was cancelled (context.Canceled). It makes
+	// getJobContext report the "cancelled" status so cancelled()/always() evaluate the way
+	// GitHub Actions does, letting cleanup and always() steps run while normal steps skip.
+	jobCancelled bool
+	// jobFailed records failures outside normal main-step results, such as action pre-step
+	// failures. Those failures must still make success() false and failure() true for later
+	// main-step if evaluation.
+	jobFailed bool
+}
+
+// markCancelled flags the job as cancelled so subsequent step `if` evaluations and the
+// job status context observe the "cancelled" state.
+func (rc *RunContext) markCancelled() {
+	rc.jobCancelled = true
+}
+
+// markFailed flags the job as failed so subsequent step `if` evaluations observe
+// failure even when the error happened outside a main step result.
+func (rc *RunContext) markFailed() {
+	rc.jobFailed = true
+}
+
+// markInterrupted records the job's interruption status from a context error so later step `if` evaluations and the job result observe it,
+// keeping the timeout path symmetric with the cancel path:
+//   - context.Canceled (server cancel) marks the job cancelled, matching GitHub's "only always()/cancelled() run on cancel".
+//   - context.DeadlineExceeded (job timeout-minutes) marks the job failed, matching the "Timeout -> FAILURE" reporting semantics.
+func (rc *RunContext) markInterrupted(err error) {
+	switch {
+	case errors.Is(err, context.Canceled):
+		rc.markCancelled()
+	case errors.Is(err, context.DeadlineExceeded):
+		rc.markFailed()
+	}
 }
 
 func (rc *RunContext) AddMask(mask string) {
@@ -87,7 +140,9 @@ func (rc *RunContext) GetEnv() map[string]string {
 			}
 		}
 	}
-	rc.Env["ACT"] = "true"
+	if !rc.Config.DisableActEnv {
+		rc.Env["ACT"] = "true"
+	}
 
 	if !rc.Config.NoSkipCheckout {
 		rc.Env["ACT_SKIP_CHECKOUT"] = "true"
@@ -130,62 +185,115 @@ func getDockerDaemonSocketMountPath(daemonPath string) string {
 	return daemonPath
 }
 
+// containerDaemonSocket returns the configured Docker daemon socket, applying the default
+// without mutating the shared Config. Parallel jobs in a plan share one *Config, so a job
+// must never write to it.
+func (rc *RunContext) containerDaemonSocket() string {
+	if rc.Config.ContainerDaemonSocket == "" {
+		return "/var/run/docker.sock"
+	}
+	return rc.Config.ContainerDaemonSocket
+}
+
+// validVolumes returns the volumes allowed on this job's containers: the configured base
+// plus the volumes the runner mounts automatically. It derives a fresh slice every call and
+// never mutates the shared Config (see containerDaemonSocket).
+func (rc *RunContext) validVolumes() []string {
+	name := rc.jobContainerName()
+	volumes := slices.Clone(rc.Config.ValidVolumes)
+	// TODO: add a new configuration to control whether the docker daemon can be mounted
+	return append(volumes, "act-toolcache", name, name+"-env",
+		getDockerDaemonSocketMountPath(rc.containerDaemonSocket()))
+}
+
+// toolCache returns the tool cache path the job sees, relocatable through RUNNER_TOOL_CACHE.
+func (rc *RunContext) toolCache(fallback string) string {
+	if path := rc.GetEnv()["RUNNER_TOOL_CACHE"]; path != "" {
+		return path
+	}
+	return fallback
+}
+
+// runnerEnv returns a container's RUNNER_* variables, derived from the values runner.tool_cache
+// and friends report so the two cannot drift apart.
+func (rc *RunContext) runnerEnv(ctx context.Context) []string {
+	ext := container.LinuxContainerEnvironmentExtensions{}
+	runnerContext := ext.GetRunnerContext(ctx)
+	runnerContext["tool_cache"] = rc.toolCache(container.DefaultToolCache)
+
+	env := make([]string, 0, len(runnerContext))
+	for key, value := range runnerContext {
+		env = append(env, fmt.Sprintf("RUNNER_%s=%s", strings.ToUpper(key), value))
+	}
+	slices.Sort(env)
+	return env
+}
+
+// splitVolumes routes volume specs into binds and a source:target mount map, and returns the
+// container paths they mount onto. Only a plain source:target volume fits the map, everything
+// else (anonymous volumes, host binds, mount options) stays a bind.
+func splitVolumes(specs []string) ([]string, map[string]string, map[string]bool) {
+	binds := []string{}
+	mounts := map[string]string{}
+	targets := map[string]bool{}
+
+	for _, spec := range specs {
+		parsed, err := loader.ParseVolume(spec)
+		if err != nil {
+			binds = append(binds, spec) // let Docker report the malformed spec
+			continue
+		}
+		targets[parsed.Target] = true
+		if parsed.Type == string(mount.TypeVolume) && parsed.Source != "" && !parsed.ReadOnly {
+			mounts[parsed.Source] = parsed.Target
+		} else {
+			binds = append(binds, spec)
+		}
+	}
+	return binds, mounts, targets
+}
+
 // Returns the binds and mounts for the container, resolving paths as appopriate
 func (rc *RunContext) GetBindsAndMounts() ([]string, map[string]string) {
 	name := rc.jobContainerName()
-
-	if rc.Config.ContainerDaemonSocket == "" {
-		rc.Config.ContainerDaemonSocket = "/var/run/docker.sock"
-	}
-
-	binds := []string{}
-	if rc.Config.ContainerDaemonSocket != "-" {
-		daemonPath := getDockerDaemonSocketMountPath(rc.Config.ContainerDaemonSocket)
-		binds = append(binds, fmt.Sprintf("%s:%s", daemonPath, "/var/run/docker.sock"))
-	}
-
 	ext := container.LinuxContainerEnvironmentExtensions{}
 
-	mounts := map[string]string{
-		"act-toolcache": "/opt/hostedtoolcache",
-		name + "-env":   ext.GetActPath(),
-	}
-
+	var volumes []string
 	if job := rc.Run.Job(); job != nil {
 		if container := job.Container(); container != nil {
 			for _, v := range container.Volumes {
-				if !strings.Contains(v, ":") || filepath.IsAbs(v) {
-					// Bind anonymous volume or host file.
-					binds = append(binds, v)
-				} else {
-					// Mount existing volume.
-					paths := strings.SplitN(v, ":", 2)
-					mounts[paths[0]] = paths[1]
+				if rc.ExprEval != nil {
+					v = rc.ExprEval.Interpolate(context.Background(), v)
 				}
+				volumes = append(volumes, v)
 			}
 		}
 	}
+	// the runner's own mounts below yield to the targets the job claims
+	binds, mounts, claimed := splitVolumes(volumes)
 
-	if rc.Config.BindWorkdir {
-		bindModifiers := ""
-		if runtime.GOOS == "darwin" {
-			bindModifiers = ":delegated"
-		}
-		if selinux.GetEnabled() {
-			bindModifiers = ":z"
-		}
-		binds = append(binds, fmt.Sprintf("%s:%s%s", rc.Config.Workdir, ext.ToContainerPath(rc.Config.Workdir), bindModifiers))
-	} else {
-		mounts[name] = ext.ToContainerPath(rc.Config.Workdir)
+	if daemonSocket := rc.containerDaemonSocket(); daemonSocket != "-" && !claimed["/var/run/docker.sock"] {
+		binds = append(binds, getDockerDaemonSocketMountPath(daemonSocket)+":/var/run/docker.sock")
 	}
+	if toolCache := rc.toolCache(container.DefaultToolCache); !claimed[toolCache] {
+		mounts["act-toolcache"] = toolCache
+	}
+	mounts[name+"-env"] = ext.GetActPath() // runner-internal, never overridable
 
-	// For Gitea
-	// add some default binds and mounts to ValidVolumes
-	rc.Config.ValidVolumes = append(rc.Config.ValidVolumes, "act-toolcache")
-	rc.Config.ValidVolumes = append(rc.Config.ValidVolumes, name)
-	rc.Config.ValidVolumes = append(rc.Config.ValidVolumes, name+"-env")
-	// TODO: add a new configuration to control whether the docker daemon can be mounted
-	rc.Config.ValidVolumes = append(rc.Config.ValidVolumes, getDockerDaemonSocketMountPath(rc.Config.ContainerDaemonSocket))
+	if workdir := ext.ToContainerPath(rc.Config.Workdir); !claimed[workdir] {
+		if rc.Config.BindWorkdir {
+			bindModifiers := ""
+			if runtime.GOOS == "darwin" {
+				bindModifiers = ":delegated"
+			}
+			if selinux.GetEnabled() {
+				bindModifiers = ":z"
+			}
+			binds = append(binds, fmt.Sprintf("%s:%s%s", rc.Config.Workdir, workdir, bindModifiers))
+		} else {
+			mounts[name] = workdir
+		}
+	}
 
 	return binds, mounts
 }
@@ -218,21 +326,25 @@ func (rc *RunContext) startHostEnvironment() common.Executor {
 		if err := os.MkdirAll(runnerTmp, 0o777); err != nil {
 			return err
 		}
-		toolCache := filepath.Join(cacheDir, "tool_cache")
+		toolCache := rc.toolCache(filepath.Join(cacheDir, "tool_cache"))
+		if err := os.MkdirAll(toolCache, 0o777); err != nil {
+			return err
+		}
 		rc.JobContainer = &container.HostEnvironment{
-			Path:        path,
-			TmpDir:      runnerTmp,
-			ToolCache:   toolCache,
-			Workdir:     rc.Config.Workdir,
-			BindWorkdir: rc.Config.BindWorkdir,
-			ActPath:     actPath,
+			Path:         path,
+			TmpDir:       runnerTmp,
+			ToolCache:    toolCache,
+			Workdir:      rc.Config.Workdir,
+			CleanWorkdir: rc.Config.CleanWorkdir,
+			ActPath:      actPath,
 			CleanUp: func() {
 				os.RemoveAll(miscpath)
 			},
-			StdOut: logWriter,
+			StdOut:      logWriter,
+			AllocatePTY: rc.Config.AllocatePTY,
 		}
 		rc.cleanUpJobContainer = rc.JobContainer.Remove()
-		for k, v := range rc.JobContainer.GetRunnerContext(ctx) {
+		for k, v := range rc.getRunnerContext(ctx) {
 			if v, ok := v.(string); ok {
 				rc.Env["RUNNER_"+strings.ToUpper(k)] = v
 			}
@@ -273,6 +385,9 @@ func printStartJobContainerGroup(ctx context.Context, image, name, network strin
 	}
 }
 
+// newContainer is a variable so tests can substitute a container that needs no Docker daemon.
+var newContainer = container.NewContainer
+
 func (rc *RunContext) startJobContainer() common.Executor {
 	return func(ctx context.Context) error {
 		logger := common.Logger(ctx)
@@ -299,10 +414,7 @@ func (rc *RunContext) startJobContainer() common.Executor {
 
 		envList := make([]string, 0)
 
-		envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TOOL_CACHE", "/opt/hostedtoolcache"))
-		envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_OS", "Linux"))
-		envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_ARCH", container.RunnerArch(ctx)))
-		envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TEMP", "/tmp"))
+		envList = append(envList, rc.runnerEnv(ctx)...)
 		envList = append(envList, fmt.Sprintf("%s=%s", "LANG", "C.UTF-8")) // Use same locale as GitHub Actions
 
 		ext := container.LinuxContainerEnvironmentExtensions{}
@@ -315,8 +427,17 @@ func (rc *RunContext) startJobContainer() common.Executor {
 
 		// add service containers
 		for serviceID, spec := range rc.Run.Job().Services {
+			// GitHub compatibility: skip services whose image evaluates to an
+			// empty string, enabling conditional services via expressions
+			serviceImage := rc.ExprEval.Interpolate(ctx, spec.Image)
+			if serviceImage == "" {
+				logger.Infof("The service '%s' will not be started because the container definition has an empty image.", serviceID)
+				continue
+			}
 			// interpolate env
-			interpolatedEnvs := make(map[string]string, len(spec.Env))
+			interpolatedEnvs := make(map[string]string, len(spec.Env)+len(rc.Config.ProxyEnv))
+			// a service reaches the internet the way the job does; its own env still wins
+			maps0.Copy(interpolatedEnvs, rc.Config.ProxyEnv)
 			for k, v := range spec.Env {
 				interpolatedEnvs[k] = rc.ExprEval.Interpolate(ctx, v)
 			}
@@ -329,7 +450,9 @@ func (rc *RunContext) startJobContainer() common.Executor {
 			for _, v := range spec.Cmd {
 				interpolatedCmd = append(interpolatedCmd, rc.ExprEval.Interpolate(ctx, v))
 			}
-			username, password, err = rc.handleServiceCredentials(ctx, spec.Credentials)
+			// keep these local: reusing username/password would overwrite the
+			// credentials the job container is pulled with further down
+			serviceUsername, servicePassword, err := rc.handleServiceCredentials(ctx, spec.Credentials)
 			if err != nil {
 				return fmt.Errorf("failed to handle service %s credentials: %w", serviceID, err)
 			}
@@ -350,12 +473,12 @@ func (rc *RunContext) startJobContainer() common.Executor {
 			}
 
 			serviceContainerName := createContainerName(rc.jobContainerName(), serviceID)
-			c := container.NewContainer(&container.NewContainerInput{
+			c := newContainer(&container.NewContainerInput{
 				Name:           serviceContainerName,
 				WorkingDir:     ext.ToContainerPath(rc.Config.Workdir),
-				Image:          rc.ExprEval.Interpolate(ctx, spec.Image),
-				Username:       username,
-				Password:       password,
+				Image:          serviceImage,
+				Username:       serviceUsername,
+				Password:       servicePassword,
 				Cmd:            interpolatedCmd,
 				Env:            envs,
 				Mounts:         serviceMounts,
@@ -371,46 +494,17 @@ func (rc *RunContext) startJobContainer() common.Executor {
 				NetworkAliases: []string{serviceID},
 				ExposedPorts:   exposedPorts,
 				PortBindings:   portBindings,
+				AllocatePTY:    rc.Config.AllocatePTY,
 			})
 			rc.ServiceContainers = append(rc.ServiceContainers, c)
 		}
 
-		rc.cleanUpJobContainer = func(ctx context.Context) error {
-			reuseJobContainer := func(ctx context.Context) bool {
-				return rc.Config.ReuseContainers
-			}
-
-			if rc.JobContainer != nil {
-				return rc.JobContainer.Remove().IfNot(reuseJobContainer).
-					Then(container.NewDockerVolumeRemoveExecutor(rc.jobContainerName(), false)).IfNot(reuseJobContainer).
-					Then(container.NewDockerVolumeRemoveExecutor(rc.jobContainerName()+"-env", false)).IfNot(reuseJobContainer).
-					Then(func(ctx context.Context) error {
-						if len(rc.ServiceContainers) > 0 {
-							logger.Infof("Cleaning up services for job %s", rc.JobName)
-							if err := rc.stopServiceContainers()(ctx); err != nil {
-								logger.Errorf("Error while cleaning services: %v", err)
-							}
-						}
-						if createAndDeleteNetwork {
-							// clean network if it has been created by act
-							// if using service containers
-							// it means that the network to which containers are connecting is created by `runner`,
-							// so, we should remove the network at last.
-							logger.Infof("Cleaning up network for job %s, and network name is: %s", rc.JobName, networkName)
-							if err := container.NewDockerNetworkRemoveExecutor(networkName)(ctx); err != nil {
-								logger.Errorf("Error while cleaning network: %v", err)
-							}
-						}
-						return nil
-					})(ctx)
-			}
-			return nil
-		}
+		rc.cleanUpJobContainer = rc.cleanupJobResources(networkName, createAndDeleteNetwork)
 
 		// For Gitea, `jobContainerNetwork` should be the same as `networkName`
 		jobContainerNetwork := networkName
 
-		rc.JobContainer = container.NewContainer(&container.NewContainerInput{
+		rc.JobContainer = newContainer(&container.NewContainerInput{
 			Cmd:            nil,
 			Entrypoint:     []string{"/bin/sleep", fmt.Sprint(rc.Config.ContainerMaxLifetime.Round(time.Second).Seconds())},
 			WorkingDir:     ext.ToContainerPath(rc.Config.Workdir),
@@ -430,7 +524,8 @@ func (rc *RunContext) startJobContainer() common.Executor {
 			Platform:       rc.Config.ContainerArchitecture,
 			Options:        rc.options(ctx),
 			AutoRemove:     rc.Config.AutoRemove,
-			ValidVolumes:   rc.Config.ValidVolumes,
+			ValidVolumes:   rc.validVolumes(),
+			AllocatePTY:    rc.Config.AllocatePTY,
 		})
 		if rc.JobContainer == nil {
 			return errors.New("Failed to create job container")
@@ -441,7 +536,8 @@ func (rc *RunContext) startJobContainer() common.Executor {
 			rc.pullServicesImages(rc.Config.ForcePull),
 			rc.JobContainer.Pull(rc.Config.ForcePull),
 			rc.stopJobContainer(),
-			container.NewDockerNetworkCreateExecutor(networkName).IfBool(createAndDeleteNetwork),
+			container.NewDockerNetworkCreateExecutor(networkName, rc.Config.ContainerNetworkCreateOptions).
+				IfBool(createAndDeleteNetwork),
 			rc.startServiceContainers(networkName),
 			rc.JobContainer.Create(rc.Config.ContainerCapAdd, rc.Config.ContainerCapDrop),
 			rc.JobContainer.Start(false),
@@ -458,6 +554,41 @@ func (rc *RunContext) startJobContainer() common.Executor {
 	}
 }
 
+// cleanupJobResources removes everything the job created, continuing past failures.
+// Only job container and volume errors are returned, the rest are logged.
+func (rc *RunContext) cleanupJobResources(networkName string, createAndDeleteNetwork bool) common.Executor {
+	return func(ctx context.Context) error {
+		logger := common.Logger(ctx)
+		removeJobContainer := rc.JobContainer != nil && !rc.Config.ReuseContainers
+
+		var errs []error
+		if removeJobContainer {
+			errs = append(errs, rc.JobContainer.Remove()(ctx))
+		}
+		if len(rc.ServiceContainers) > 0 {
+			logger.Infof("Cleaning up services for job %s", rc.JobName)
+			if err := rc.stopServiceContainers()(ctx); err != nil {
+				logger.Errorf("Error while cleaning services: %v", err)
+			}
+		}
+		if removeJobContainer {
+			// after the containers using them, services can hold these via `--volumes-from`
+			name := rc.jobContainerName()
+			errs = append(errs,
+				container.NewDockerVolumeRemoveExecutor(name, false)(ctx),
+				container.NewDockerVolumeRemoveExecutor(name+"-env", false)(ctx))
+		}
+		if createAndDeleteNetwork {
+			// last, once every container has detached
+			logger.Infof("Cleaning up network for job %s, and network name is: %s", rc.JobName, networkName)
+			if err := container.NewDockerNetworkRemoveExecutor(networkName)(ctx); err != nil {
+				logger.Errorf("Error while cleaning network: %v", err)
+			}
+		}
+		return errors.Join(errs...)
+	}
+}
+
 func (rc *RunContext) execJobContainer(cmd []string, env map[string]string, user, workdir string) common.Executor { //nolint:unparam // pre-existing issue from nektos/act
 	return func(ctx context.Context) error {
 		return rc.JobContainer.Exec(cmd, env, user, workdir)(ctx)
@@ -583,14 +714,26 @@ func (rc *RunContext) ActionCacheDir() string {
 }
 
 // Interpolate outputs after a job is done
+// jobMutexes serializes per-job result/output aggregation across the matrix combinations that
+// share one *model.Job and run in parallel. Keyed by the shared *model.Job (mirrors the
+// per-directory AcquireCloneLock pattern).
+var jobMutexes lock.Keyed[*model.Job]
+
+func lockJob(job *model.Job) func() {
+	return jobMutexes.Lock(job)
+}
+
 func (rc *RunContext) interpolateOutputs() common.Executor {
 	return func(ctx context.Context) error {
 		ee := rc.NewExpressionEvaluator(ctx)
-		for k, v := range rc.Run.Job().Outputs {
-			interpolated := ee.Interpolate(ctx, v)
-			if v != interpolated {
-				rc.Run.Job().Outputs[k] = interpolated
-			}
+		job := rc.Run.Job()
+		// Matrix combinations share this Job and its Outputs map. Interpolate from this combo's
+		// pristine snapshot (outputTemplate) and write under the lock, so each combo overwrites
+		// with its own resolved values (last wins, as on GitHub) instead of the first combo's
+		// resolved values freezing the shared template against later combos.
+		defer lockJob(job)()
+		for k, v := range rc.outputTemplate {
+			job.Outputs[k] = ee.Interpolate(ctx, v)
 		}
 		return nil
 	}
@@ -598,10 +741,34 @@ func (rc *RunContext) interpolateOutputs() common.Executor {
 
 func (rc *RunContext) startContainer() common.Executor {
 	return func(ctx context.Context) error {
+		var err error
 		if rc.IsHostEnv(ctx) {
-			return rc.startHostEnvironment()(ctx)
+			err = rc.startHostEnvironment()(ctx)
+		} else {
+			err = rc.startJobContainer()(ctx)
 		}
-		return rc.startJobContainer()(ctx)
+		if err != nil {
+			// The job executor's teardown only runs after a successful start, so a failed
+			// start would otherwise leak the per-job network and container.
+			rc.cleanupFailedStart(ctx)
+		}
+		return err
+	}
+}
+
+func (rc *RunContext) cleanupFailedStart(ctx context.Context) {
+	if rc.cleanUpJobContainer == nil {
+		return
+	}
+	cleanCtx := ctx
+	if ctx.Err() != nil {
+		// the start likely failed because ctx was cancelled, detach so teardown still runs
+		var cancel context.CancelFunc
+		cleanCtx, cancel = context.WithTimeout(common.WithLogger(context.Background(), common.Logger(ctx)), time.Minute)
+		defer cancel()
+	}
+	if err := rc.cleanUpJobContainer(cleanCtx); err != nil {
+		common.Logger(ctx).Errorf("Error while cleaning up after failed container start for job %s: %v", rc.JobName, err)
 	}
 }
 
@@ -633,7 +800,29 @@ func (rc *RunContext) result(result string) {
 }
 
 func (rc *RunContext) steps() []*model.Step {
-	return rc.Run.Job().Steps
+	// Return per-job copies of the steps. Matrix combinations run in parallel and share the
+	// workflow model, but step execution mutates per-job fields and evaluates the If/Env nodes
+	// in place, so the *model.Step instances must not be shared across jobs (see Step.Clone).
+	shared := rc.Run.Job().Steps
+	steps := make([]*model.Step, len(shared))
+	for i, step := range shared {
+		if step == nil {
+			continue
+		}
+		steps[i] = step.Clone()
+	}
+	return steps
+}
+
+// topLevelRunContext walks the Parent chain to the outermost RunContext. Composite
+// actions create child RunContexts whose sub-steps need to share the outer job step's
+// summary file path so that nested writes accumulate under the right step_index.
+func (rc *RunContext) topLevelRunContext() *RunContext {
+	top := rc
+	for top.Parent != nil {
+		top = top.Parent
+	}
+	return top
 }
 
 // Executor returns a pipeline executor for all the steps in the job
@@ -655,7 +844,13 @@ func (rc *RunContext) Executor() (common.Executor, error) {
 	return func(ctx context.Context) error {
 		res, err := rc.isEnabled(ctx)
 		if err != nil {
-			rc.caller.setReusedWorkflowJobResult(rc.JobName, "failure") // For Gitea
+			// Record the failure so a job whose if-expression fails to evaluate
+			// gets a result (and therefore a stop time) instead of being left
+			// unfinished. rc.caller is only set for reusable workflows.
+			rc.result("failure")
+			if rc.caller != nil { // For Gitea
+				rc.caller.setReusedWorkflowJobResult(rc.JobName, "failure")
+			}
 			return err
 		}
 		if res {
@@ -710,12 +905,15 @@ func (rc *RunContext) runsOnPlatformNames(ctx context.Context) []string {
 		return []string{}
 	}
 
-	if err := rc.ExprEval.EvaluateYamlNode(ctx, &job.RawRunsOn); err != nil {
+	// Evaluate a copy: RawRunsOn is shared across parallel matrix jobs, so interpolating it in
+	// place would race and leak one matrix combination's runs-on into the others.
+	rawRunsOn := model.CloneYamlNode(job.RawRunsOn)
+	if err := rc.ExprEval.EvaluateYamlNode(ctx, &rawRunsOn); err != nil {
 		common.Logger(ctx).Errorf("Error while evaluating runs-on: %v", err)
 		return []string{}
 	}
 
-	return job.RunsOn()
+	return model.RunsOnFromNode(rawRunsOn)
 }
 
 func (rc *RunContext) platformImage(ctx context.Context) string {
@@ -773,6 +971,20 @@ func (rc *RunContext) isEnabled(ctx context.Context) (bool, error) {
 	return true, nil
 }
 
+// proxyBuildArgs returns the job's proxy variables as docker build args. The docker CLI
+// pre-populates these from its own client configuration, but act builds through the API,
+// so without them a Dockerfile action's RUN steps have no network behind a proxy.
+func (rc *RunContext) proxyBuildArgs() map[string]*string {
+	if len(rc.Config.ProxyEnv) == 0 {
+		return nil
+	}
+	args := make(map[string]*string, len(rc.Config.ProxyEnv))
+	for name, value := range rc.Config.ProxyEnv {
+		args[name] = &value
+	}
+	return args
+}
+
 func mergeMaps(maps ...map[string]string) map[string]string {
 	rtnMap := make(map[string]string)
 	for _, m := range maps {
@@ -806,12 +1018,21 @@ func trimToLen(s string, l int) string {
 
 func (rc *RunContext) getJobContext() *model.JobContext {
 	jobStatus := "success"
+	if rc.jobFailed {
+		jobStatus = "failure"
+	}
 	for _, stepStatus := range rc.StepResults {
 		if stepStatus.Conclusion == model.StepStatusFailure {
 			jobStatus = "failure"
 			break
 		}
 	}
+	// A cancelled run takes precedence over success/failure so cancelled() is true and
+	// success()/failure() are false, matching GitHub Actions: on cancellation only
+	// always() and cancelled() steps run.
+	if rc.jobCancelled {
+		jobStatus = "cancelled"
+	}
 	return &model.JobContext{
 		Status: jobStatus,
 	}
@@ -821,6 +1042,23 @@ func (rc *RunContext) getStepsContext() map[string]*model.StepResult {
 	return rc.StepResults
 }
 
+// getRunnerContext returns the `runner` context: what the execution environment knows
+// (os, arch, temp, tool_cache) plus what only the runner process knows.
+func (rc *RunContext) getRunnerContext(ctx context.Context) map[string]any {
+	runnerContext := map[string]any{}
+	if rc.JobContainer != nil {
+		maps0.Copy(runnerContext, rc.JobContainer.GetRunnerContext(ctx))
+		defaultToolCache, _ := runnerContext["tool_cache"].(string)
+		runnerContext["tool_cache"] = rc.toolCache(defaultToolCache)
+	}
+	runnerContext["name"] = rc.Config.RunnerName
+	runnerContext["environment"] = "self-hosted"
+	if rc.Config.RunnerDebug() {
+		runnerContext["debug"] = "1"
+	}
+	return runnerContext
+}
+
 func (rc *RunContext) getGithubContext(ctx context.Context) *model.GithubContext {
 	logger := common.Logger(ctx)
 	ghc := &model.GithubContext{
@@ -1005,7 +1243,7 @@ func nestedMapLookup(m map[string]any, ks ...string) (rval any) {
 	}
 }
 
-func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubContext, env map[string]string) map[string]string { //nolint:unparam // pre-existing issue from nektos/act
+func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubContext, env map[string]string) {
 	env["CI"] = "true"
 	env["GITHUB_WORKFLOW"] = github.Workflow
 	env["GITHUB_RUN_ID"] = github.RunID
@@ -1047,23 +1285,71 @@ func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubCon
 		env["GITHUB_RUN_ATTEMPT"] = github.RunAttempt
 	}
 
+	env["RUNNER_NAME"] = rc.Config.RunnerName
+	env["RUNNER_ENVIRONMENT"] = "self-hosted"
+	if workspace := parentDir(github.Workspace); workspace != "" {
+		env["RUNNER_WORKSPACE"] = workspace
+	}
+	if rc.Config.RunnerDebug() {
+		env["RUNNER_DEBUG"] = "1"
+	}
+
 	if rc.Config.ArtifactServerPath != "" {
 		setActionRuntimeVars(rc, env)
 	}
 
-	for _, platformName := range rc.runsOnPlatformNames(ctx) {
-		if platformName != "" {
-			if platformName == "ubuntu-latest" {
-				// hardcode current ubuntu-latest since we have no way to check that 'on the fly'
-				env["ImageOS"] = "ubuntu20"
-			} else {
-				platformName = strings.SplitN(strings.Replace(platformName, `-`, ``, 1), `.`, 2)[0]
-				env["ImageOS"] = platformName
-			}
-		}
+	if imageOS := rc.imageOS(ctx); imageOS != "" {
+		env["ImageOS"] = imageOS
+	}
+}
+
+// parentDir returns the directory containing p, or "" when p names no parent. Both
+// separators are accepted rather than filepath's, as p may describe a container while
+// the runner itself runs on Windows, or the other way round.
+func parentDir(p string) string {
+	if slash := strings.LastIndexAny(p, `/\`); slash > 0 {
+		return p[:slash]
+	}
+	return ""
+}
+
+// imageOS returns ImageOS, which setup-* actions use to tell one runner image release
+// from another. The resolved image tag is preferred over the runs-on label because it
+// still names a release when the label is a rolling one such as ubuntu-latest.
+func (rc *RunContext) imageOS(ctx context.Context) string {
+	if rc.Run.Job().RunsOn() == nil {
+		// A composite action runs on a synthetic job, and resolving its image would only
+		// log that runs-on is missing.
+		return ""
+	}
+	if imageOS := imageOSFromImage(rc.platformImage(ctx)); imageOS != "" {
+		return imageOS
 	}
 
-	return env
+	for _, platformName := range slices.Backward(rc.runsOnPlatformNames(ctx)) {
+		if platformName == "ubuntu-latest" {
+			// Rolling label whose image names no release either, so keep the historical value.
+			return "ubuntu20"
+		} else if platformName != "" {
+			return strings.SplitN(strings.Replace(platformName, `-`, ``, 1), `.`, 2)[0]
+		}
+	}
+	return ""
+}
+
+// imageOSTag matches an image reference tagged with an OS family ImageOS can report plus
+// its release, such as "docker.gitea.com/runner-images:ubuntu-24.04". Anything else
+// ("ubuntu-latest", "app:22.04", "catthehacker/ubuntu:act-22.04", or a registry port) is
+// left to the runs-on label rather than turned into a bogus OS.
+var imageOSTag = regexp.MustCompile(`:(ubuntu|win|macos)-?([0-9]+)[^/]*$`)
+
+// imageOSFromImage derives ImageOS from an image reference, e.g.
+// "docker.gitea.com/runner-images:ubuntu-24.04" yields "ubuntu24".
+func imageOSFromImage(image string) string {
+	if match := imageOSTag.FindStringSubmatch(image); match != nil {
+		return match[1] + match[2]
+	}
+	return ""
 }
 
 func setActionRuntimeVars(rc *RunContext, env map[string]string) {
@@ -1081,21 +1367,18 @@ func setActionRuntimeVars(rc *RunContext, env map[string]string) {
 }
 
 func (rc *RunContext) handleCredentials(ctx context.Context) (string, string, error) {
-	// TODO: remove below 2 lines when we can release act with breaking changes
-	username := rc.Config.Secrets["DOCKER_USERNAME"]
-	password := rc.Config.Secrets["DOCKER_PASSWORD"]
-
 	container := rc.Run.Job().Container()
 	if container == nil || container.Credentials == nil {
-		return username, password, nil
+		return "", "", nil
 	}
 
-	if container.Credentials != nil && len(container.Credentials) != 2 {
+	if len(container.Credentials) != 2 {
 		err := errors.New("invalid property count for key 'credentials:'")
 		return "", "", err
 	}
 
 	ee := rc.NewExpressionEvaluator(ctx)
+	var username, password string
 	if username = ee.Interpolate(ctx, container.Credentials["username"]); username == "" {
 		err := errors.New("failed to interpolate container.credentials.username")
 		return "", "", err
@@ -1138,27 +1421,9 @@ func (rc *RunContext) handleServiceCredentials(ctx context.Context, creds map[st
 
 // GetServiceBindsAndMounts returns the binds and mounts for the service container, resolving paths as appopriate
 func (rc *RunContext) GetServiceBindsAndMounts(svcVolumes []string) ([]string, map[string]string) {
-	if rc.Config.ContainerDaemonSocket == "" {
-		rc.Config.ContainerDaemonSocket = "/var/run/docker.sock"
+	binds, mounts, claimed := splitVolumes(svcVolumes)
+	if daemonSocket := rc.containerDaemonSocket(); daemonSocket != "-" && !claimed["/var/run/docker.sock"] {
+		binds = append(binds, getDockerDaemonSocketMountPath(daemonSocket)+":/var/run/docker.sock")
 	}
-	binds := []string{}
-	if rc.Config.ContainerDaemonSocket != "-" {
-		daemonPath := getDockerDaemonSocketMountPath(rc.Config.ContainerDaemonSocket)
-		binds = append(binds, fmt.Sprintf("%s:%s", daemonPath, "/var/run/docker.sock"))
-	}
-
-	mounts := map[string]string{}
-
-	for _, v := range svcVolumes {
-		if !strings.Contains(v, ":") || filepath.IsAbs(v) {
-			// Bind anonymous volume or host file.
-			binds = append(binds, v)
-		} else {
-			// Mount existing volume.
-			paths := strings.SplitN(v, ":", 2)
-			mounts[paths[0]] = paths[1]
-		}
-	}
-
 	return binds, mounts
 }

act/runner/run_context_test.go

@@ -7,6 +7,7 @@ package runner
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"runtime"
@@ -14,11 +15,14 @@ import (
 	"testing"
 
 	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/container"
 	"gitea.com/gitea/runner/act/exprparser"
 	"gitea.com/gitea/runner/act/model"
 
+	"github.com/docker/cli/cli/compose/loader"
 	log "github.com/sirupsen/logrus"
 	assert "github.com/stretchr/testify/assert"
+	require "github.com/stretchr/testify/require"
 	yaml "go.yaml.in/yaml/v4"
 )
 
@@ -169,6 +173,202 @@ func TestRunContext_EvalBool(t *testing.T) {
 	}
 }
 
+func TestRunContextHandleCredentialsDoesNotUseDockerSecrets(t *testing.T) {
+	workflow, err := model.ReadWorkflow(strings.NewReader(`
+name: test
+on: push
+jobs:
+  job:
+    runs-on: ubuntu-latest
+    steps: []
+`))
+	require.NoError(t, err)
+
+	rc := &RunContext{
+		Config: &Config{
+			Secrets: map[string]string{
+				"DOCKER_USERNAME": "docker-user",
+				"DOCKER_PASSWORD": "docker-password",
+			},
+			Env: map[string]string{},
+		},
+		Run: &model.Run{
+			JobID:    "job",
+			Workflow: workflow,
+		},
+	}
+
+	// DOCKER_USERNAME/DOCKER_PASSWORD secrets should not be used as implicit job container pull credentials.
+	username, password, err := rc.handleCredentials(t.Context())
+	require.NoError(t, err)
+	assert.Empty(t, username)
+	assert.Empty(t, password)
+}
+
+// fakeContainer turns every container operation into a no-op, so startJobContainer
+// runs without a Docker daemon. The embedded interface is nil, so any method the
+// test does not exercise panics rather than silently doing the wrong thing.
+type fakeContainer struct {
+	container.ExecutionsEnvironment
+}
+
+func (fakeContainer) Pull(bool) common.Executor  { return func(context.Context) error { return nil } }
+func (fakeContainer) Start(bool) common.Executor { return func(context.Context) error { return nil } }
+func (fakeContainer) Remove() common.Executor    { return func(context.Context) error { return nil } }
+func (fakeContainer) Close() common.Executor     { return func(context.Context) error { return nil } }
+func (fakeContainer) GetActPath() string         { return "/var/run/act" }
+func (fakeContainer) Create([]string, []string) common.Executor {
+	return func(context.Context) error { return nil }
+}
+
+func (fakeContainer) Copy(string, ...*container.FileEntry) common.Executor {
+	return func(context.Context) error { return nil }
+}
+
+// Regression test: a service without a `credentials:` block resolves to empty
+// credentials, which used to overwrite the job container's own credentials.
+func TestStartJobContainerKeepsJobCredentialsWithServices(t *testing.T) {
+	workflow, err := model.ReadWorkflow(strings.NewReader(`
+name: test
+on: push
+jobs:
+  job:
+    runs-on: ubuntu-latest
+    container:
+      image: registry.example/private:latest
+      credentials:
+        username: job-user
+        password: job-password
+    services:
+      redis:
+        image: redis:latest
+      db:
+        image: postgres:latest
+        credentials:
+          username: db-user
+          password: db-password
+    steps: []
+`))
+	require.NoError(t, err)
+
+	var inputs []*container.NewContainerInput
+	origNewContainer := newContainer
+	newContainer = func(input *container.NewContainerInput) container.ExecutionsEnvironment {
+		inputs = append(inputs, input)
+		return fakeContainer{}
+	}
+	t.Cleanup(func() { newContainer = origNewContainer })
+
+	rc := &RunContext{
+		Name: "test",
+		Config: &Config{
+			Workdir: "/tmp",
+			// no daemon: an explicit network mode creates no network, and
+			// reusing containers short-circuits the volume cleanup executors
+			ContainerNetworkMode: "host",
+			ReuseContainers:      true,
+			Env:                  map[string]string{},
+			Secrets:              map[string]string{},
+		},
+		Env: map[string]string{},
+		Run: &model.Run{
+			JobID:    "job",
+			Workflow: workflow,
+		},
+	}
+	rc.ExprEval = rc.NewExpressionEvaluator(t.Context())
+
+	require.NoError(t, rc.startJobContainer()(t.Context()))
+
+	credentials := map[string][2]string{}
+	for _, in := range inputs {
+		credentials[in.Image] = [2]string{in.Username, in.Password}
+	}
+
+	// the job container keeps its own credentials, whichever services exist
+	require.Equal(t, [2]string{"job-user", "job-password"}, credentials["registry.example/private:latest"])
+	// each service keeps its own, and a service without credentials gets none
+	require.Equal(t, [2]string{"db-user", "db-password"}, credentials["postgres:latest"])
+	require.Equal(t, [2]string{"", ""}, credentials["redis:latest"])
+}
+
+// A service container reaches the internet the same way the job does, so it inherits the
+// job's proxy; a service that sets the variable itself keeps its own value.
+func TestStartJobContainerGivesServicesTheJobProxy(t *testing.T) {
+	workflow, err := model.ReadWorkflow(strings.NewReader(`
+name: test
+on: push
+jobs:
+  job:
+    runs-on: ubuntu-latest
+    container:
+      image: registry.example/job:latest
+    services:
+      redis:
+        image: redis:latest
+      db:
+        image: postgres:latest
+        env:
+          no_proxy: db-only.example
+    steps: []
+`))
+	require.NoError(t, err)
+
+	var inputs []*container.NewContainerInput
+	origNewContainer := newContainer
+	newContainer = func(input *container.NewContainerInput) container.ExecutionsEnvironment {
+		inputs = append(inputs, input)
+		return fakeContainer{}
+	}
+	t.Cleanup(func() { newContainer = origNewContainer })
+
+	rc := &RunContext{
+		Name: "test",
+		Config: &Config{
+			Workdir:              "/tmp",
+			ContainerNetworkMode: "host",
+			ReuseContainers:      true,
+			Env:                  map[string]string{},
+			ProxyEnv:             map[string]string{"http_proxy": "http://proxy:3128", "no_proxy": "internal.example"},
+			Secrets:              map[string]string{},
+		},
+		Env: map[string]string{},
+		Run: &model.Run{
+			JobID:    "job",
+			Workflow: workflow,
+		},
+	}
+	rc.ExprEval = rc.NewExpressionEvaluator(t.Context())
+
+	require.NoError(t, rc.startJobContainer()(t.Context()))
+
+	env := map[string][]string{}
+	for _, in := range inputs {
+		env[in.Image] = in.Env
+	}
+
+	require.Contains(t, env["redis:latest"], "http_proxy=http://proxy:3128")
+	require.Contains(t, env["redis:latest"], "no_proxy=internal.example")
+	// the service's own env wins over what the runner injected, without dropping the rest
+	require.Contains(t, env["postgres:latest"], "no_proxy=db-only.example")
+	require.NotContains(t, env["postgres:latest"], "no_proxy=internal.example")
+	require.Contains(t, env["postgres:latest"], "http_proxy=http://proxy:3128")
+}
+
+// act builds Dockerfile actions through the API, which does not pre-populate the proxy
+// build args the docker CLI would, so the RUN steps would have no network behind a proxy.
+func TestProxyBuildArgs(t *testing.T) {
+	rc := &RunContext{Config: &Config{ProxyEnv: map[string]string{"http_proxy": "http://proxy:3128"}}}
+
+	args := rc.proxyBuildArgs()
+
+	require.Len(t, args, 1)
+	require.Equal(t, "http://proxy:3128", *args["http_proxy"])
+
+	// a job without a proxy builds exactly as it does today
+	require.Nil(t, (&RunContext{Config: &Config{}}).proxyBuildArgs())
+}
+
 func TestRunContext_GetBindsAndMounts(t *testing.T) {
 	rctemplate := &RunContext{
 		Name: "TestRCName",
@@ -241,8 +441,43 @@ func TestRunContext_GetBindsAndMounts(t *testing.T) {
 			{"BindAnonymousVolume", []string{"/volume"}, "/volume", map[string]string{}},
 			{"BindHostFile", []string{"/path/to/file/on/host:/volume"}, "/path/to/file/on/host:/volume", map[string]string{}},
 			{"MountExistingVolume", []string{"volume-id:/volume"}, "", map[string]string{"volume-id": "/volume"}},
+			{"MountExistingVolumeReadOnly", []string{"volume-id:/volume:ro"}, "volume-id:/volume:ro", map[string]string{}},
+			{"BindRelativeHostPath", []string{"./relative:/volume"}, "./relative:/volume", map[string]string{}},
+			{"OverridesToolCache", []string{"/host/tools:/opt/hostedtoolcache"}, "/host/tools:/opt/hostedtoolcache", map[string]string{}},
+			{"OverridesDockerSocket", []string{"/host/docker.sock:/var/run/docker.sock"}, "/host/docker.sock:/var/run/docker.sock", map[string]string{}},
 		}
 
+		t.Run("InterpolatedContainerVolumes", func(t *testing.T) {
+			job := &model.Job{}
+			err := job.RawContainer.Encode(map[string][]string{
+				"volumes": {"${{ secrets.MAME }}:/root/.mame/roms:ro"},
+			})
+			require.NoError(t, err)
+
+			rc := &RunContext{
+				Name: "TestRCName",
+				Run: &model.Run{
+					Workflow: &model.Workflow{
+						Name: "TestWorkflowName",
+					},
+				},
+				Config: &Config{
+					BindWorkdir: false,
+					Secrets: map[string]string{
+						"MAME": "/host/mame/roms",
+					},
+				},
+			}
+			rc.Run.JobID = "job1"
+			rc.Run.Workflow.Jobs = map[string]*model.Job{"job1": job}
+			rc.ExprEval = rc.NewExpressionEvaluator(context.Background())
+
+			gotbind, gotmount := rc.GetBindsAndMounts()
+			assert.Contains(t, gotbind, "/host/mame/roms:/root/.mame/roms:ro")
+			assert.NotContains(t, gotbind, "${{ secrets.MAME }}")
+			assert.NotContains(t, gotmount, "${{ secrets.MAME }}")
+		})
+
 		for _, testcase := range tests {
 			t.Run(testcase.name, func(t *testing.T) {
 				job := &model.Job{}
@@ -265,21 +500,121 @@ func TestRunContext_GetBindsAndMounts(t *testing.T) {
 				rc.Run.JobID = "job1"
 				rc.Run.Workflow.Jobs = map[string]*model.Job{"job1": job}
 
-				gotbind, gotmount := rc.GetBindsAndMounts()
+				jobBinds, jobMounts := rc.GetBindsAndMounts()
+				svcBinds, svcMounts := rc.GetServiceBindsAndMounts(testcase.volumes)
+				// job and service containers classify volumes alike, only their own mounts differ
+				for _, got := range []struct {
+					binds  []string
+					mounts map[string]string
+				}{{jobBinds, jobMounts}, {svcBinds, svcMounts}} {
+					gotbind, gotmount := got.binds, got.mounts
 
-				if len(testcase.wantbind) > 0 {
-					assert.Contains(t, gotbind, testcase.wantbind)
-				}
+					if len(testcase.wantbind) > 0 {
+						assert.Contains(t, gotbind, testcase.wantbind)
+					}
 
-				for k, v := range testcase.wantmount {
-					assert.Contains(t, gotmount, k)
-					assert.Equal(t, gotmount[k], v)
+					for k, v := range testcase.wantmount {
+						assert.Contains(t, gotmount, k)
+						assert.Equal(t, gotmount[k], v)
+					}
+
+					// Docker rejects a container with two mounts on one target, so the job's own
+					// volumes must displace the runner's rather than pile up next to them.
+					targets := map[string]bool{}
+					for _, bind := range gotbind {
+						parsed, err := loader.ParseVolume(bind)
+						require.NoError(t, err)
+						assert.NotContains(t, targets, parsed.Target, "%s mounts an already mounted target", bind)
+						targets[parsed.Target] = true
+					}
+					for source, target := range gotmount {
+						assert.NotContains(t, targets, target, "%s mounts an already mounted target", source)
+						targets[target] = true
+					}
 				}
 			})
 		}
 	})
 }
 
+func TestRunContextValidVolumes(t *testing.T) {
+	rc := &RunContext{
+		Name:   "job",
+		Run:    &model.Run{Workflow: &model.Workflow{Name: "wf"}},
+		Config: &Config{ValidVolumes: []string{"my-vol", "/host/path"}},
+	}
+	name := rc.jobContainerName()
+
+	got := rc.validVolumes()
+
+	// the configured volumes plus the four the runner mounts automatically
+	assert.Subset(t, got, []string{"my-vol", "/host/path", "act-toolcache", name, name + "-env", "/var/run/docker.sock"})
+
+	// deriving the list must never mutate or grow the shared Config slice: parallel matrix
+	// combinations share one *Config, and the previous in-place append was a data race.
+	assert.Equal(t, []string{"my-vol", "/host/path"}, rc.Config.ValidVolumes)
+	assert.Len(t, rc.validVolumes(), len(got), "repeated calls must be stable, not accumulate")
+}
+
+func TestCleanupJobResourcesCleansServicesWithoutJobContainer(t *testing.T) {
+	service := &containerMock{}
+	service.On("Remove").Return(func(context.Context) error { return nil }).Once()
+	service.On("Close").Return(func(context.Context) error { return nil }).Once()
+
+	rc := &RunContext{
+		Config:            &Config{},
+		ServiceContainers: []container.ExecutionsEnvironment{service},
+	}
+
+	err := rc.cleanupJobResources("external-network", false)(context.Background())
+	require.NoError(t, err)
+	service.AssertExpectations(t)
+}
+
+// cleanup used to bail out on a previous step's error and on a cancelled context
+func TestCleanupJobResourcesContinuesAfterFailure(t *testing.T) {
+	t.Setenv("DOCKER_HOST", "unix:///nonexistent.sock")
+
+	jobContainer := &containerMock{}
+	jobContainer.On("Remove").Return(func(context.Context) error { return errors.New("removal failed") }).Once()
+	service := &containerMock{}
+	service.On("Remove").Return(func(context.Context) error { return nil }).Once()
+	service.On("Close").Return(func(context.Context) error { return nil }).Once()
+
+	rc := &RunContext{
+		Name:              "job",
+		Config:            &Config{},
+		Run:               &model.Run{Workflow: &model.Workflow{Name: "wf"}, JobID: "job"},
+		JobContainer:      jobContainer,
+		ServiceContainers: []container.ExecutionsEnvironment{service},
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	require.Error(t, rc.cleanupJobResources("job-network", true)(ctx))
+	jobContainer.AssertExpectations(t)
+	service.AssertExpectations(t)
+}
+
+// TestInterpolateOutputsIsPerMatrixCombo guards the matrix-output fix: combinations share one
+// *model.Job, so each must interpolate from its own pristine snapshot. Otherwise the first
+// combo's resolved value freezes the shared template and later combos can't resolve their own.
+func TestInterpolateOutputsIsPerMatrixCombo(t *testing.T) {
+	job := &model.Job{Outputs: map[string]string{"o": "${{ matrix.v }}"}}
+	run := &model.Run{JobID: "j", Workflow: &model.Workflow{Name: "w", Jobs: map[string]*model.Job{"j": job}}}
+	r := &runnerImpl{config: &Config{}}
+	ctx := context.Background()
+
+	rcA := r.newRunContext(ctx, run, map[string]any{"v": "a"})
+	rcB := r.newRunContext(ctx, run, map[string]any{"v": "b"})
+
+	require.NoError(t, rcA.interpolateOutputs()(ctx))
+	require.NoError(t, rcB.interpolateOutputs()(ctx))
+
+	// Last combo wins (matching GitHub) instead of being frozen to combo A's "a".
+	require.Equal(t, "b", job.Outputs["o"])
+}
+
 func TestGetGitHubContext(t *testing.T) {
 	log.SetLevel(log.DebugLevel)
 
@@ -659,3 +994,167 @@ func TestPrintStartJobContainerGroupGolden(t *testing.T) {
 	}, "\n")
 	assert.Equal(t, want, buf.String())
 }
+
+func TestRunContext_cleanupFailedStart(t *testing.T) {
+	type ctxKey string
+	const sentinel = ctxKey("sentinel")
+
+	// the fresh context is cancelled via defer on return, so capture state inside the stub
+	type capture struct {
+		calls    int
+		err      error
+		sentinel any
+	}
+	newRC := func(c *capture) *RunContext {
+		return &RunContext{
+			JobName: "job",
+			cleanUpJobContainer: func(ctx context.Context) error {
+				c.calls++
+				c.err = ctx.Err()
+				c.sentinel = ctx.Value(sentinel)
+				return nil
+			},
+		}
+	}
+
+	t.Run("runs teardown on the live context", func(t *testing.T) {
+		var c capture
+		ctx := context.WithValue(context.Background(), sentinel, "v")
+
+		newRC(&c).cleanupFailedStart(ctx)
+
+		assert.Equal(t, 1, c.calls)
+		require.NoError(t, c.err)
+		assert.Equal(t, "v", c.sentinel)
+	})
+
+	t.Run("falls back to a fresh context when the input is done", func(t *testing.T) {
+		var c capture
+		ctx, cancel := context.WithCancel(context.WithValue(context.Background(), sentinel, "v"))
+		cancel()
+
+		newRC(&c).cleanupFailedStart(ctx)
+
+		assert.Equal(t, 1, c.calls)
+		require.NoError(t, c.err)
+		assert.Nil(t, c.sentinel)
+	})
+
+	t.Run("no-op when there is nothing to clean up", func(t *testing.T) {
+		assert.NotPanics(t, func() { (&RunContext{}).cleanupFailedStart(context.Background()) })
+	})
+}
+
+func TestImageOSFromImage(t *testing.T) {
+	for _, tc := range []struct {
+		image string
+		want  string
+	}{
+		{"", ""},
+		{"docker.gitea.com/runner-images:ubuntu-24.04", "ubuntu24"},
+		{"docker.gitea.com/runner-images:ubuntu-latest", ""},
+		{"runner-images:ubuntu22.04", "ubuntu22"},
+		{"node:20", ""},
+		{"ubuntu:22.04", ""},
+		{"ubuntu", ""},
+		{"catthehacker/ubuntu:act-22.04", ""},
+		{"myco/ubuntu:v2.1", ""},
+		{"myco/ubuntu:v22.04", ""},
+		{"app:release-1", ""},
+		{"app:1.2.3", ""},
+		{"app:build-2.1", ""},
+		{"registry.example.com:5000/runner-images", ""},
+		{"registry.example.com:5000/runner-images:ubuntu-24.04", "ubuntu24"},
+	} {
+		t.Run(tc.image, func(t *testing.T) {
+			assert.Equal(t, tc.want, imageOSFromImage(tc.image))
+		})
+	}
+}
+
+func createRunsOnRunContext(t *testing.T, runsOn string) *RunContext {
+	return createIfTestRunContext(map[string]*model.Job{
+		"job1": createJob(t, "runs-on: "+runsOn, ""),
+	})
+}
+
+func TestRunContextImageOS(t *testing.T) {
+	ctx := context.Background()
+
+	t.Run("prefers the release in the resolved image tag", func(t *testing.T) {
+		rc := createRunsOnRunContext(t, "ubuntu-latest")
+		rc.Config.Platforms = map[string]string{
+			"ubuntu-latest": "docker.gitea.com/runner-images:ubuntu-24.04",
+		}
+		assert.Equal(t, "ubuntu24", rc.imageOS(ctx))
+	})
+
+	t.Run("falls back to the runs-on label", func(t *testing.T) {
+		rc := createRunsOnRunContext(t, "ubuntu-22.04")
+		rc.Config.Platforms = map[string]string{"ubuntu-22.04": "some-image"}
+		assert.Equal(t, "ubuntu22", rc.imageOS(ctx))
+	})
+
+	t.Run("keeps the historical value for a rolling label with no release", func(t *testing.T) {
+		assert.Equal(t, "ubuntu20", createRunsOnRunContext(t, "ubuntu-latest").imageOS(ctx))
+	})
+
+	t.Run("is empty for the synthetic job of a composite action", func(t *testing.T) {
+		rc := createIfTestRunContext(map[string]*model.Job{"job1": {}})
+		assert.Empty(t, rc.imageOS(ctx))
+	})
+}
+
+func TestRunContextGetRunnerContext(t *testing.T) {
+	ctx := context.Background()
+
+	t.Run("adds the runner values the container cannot know", func(t *testing.T) {
+		rc := createRunsOnRunContext(t, "ubuntu-latest")
+		rc.Config.RunnerName = "runner-1"
+
+		runnerContext := rc.getRunnerContext(ctx)
+		assert.Equal(t, "runner-1", runnerContext["name"])
+		assert.Equal(t, "self-hosted", runnerContext["environment"])
+		assert.NotContains(t, runnerContext, "debug")
+	})
+
+	t.Run("reports debug when step debugging is on", func(t *testing.T) {
+		rc := createRunsOnRunContext(t, "ubuntu-latest")
+		rc.Config.Secrets = map[string]string{"ACTIONS_STEP_DEBUG": "true"}
+
+		assert.Equal(t, "1", rc.getRunnerContext(ctx)["debug"])
+	})
+
+	t.Run("keeps the execution environment values", func(t *testing.T) {
+		rc := createRunsOnRunContext(t, "ubuntu-latest")
+		rc.JobContainer = &container.HostEnvironment{TmpDir: "/tmp/act", ToolCache: "/tmp/tool_cache"}
+
+		runnerContext := rc.getRunnerContext(ctx)
+		assert.Equal(t, "/tmp/act", runnerContext["temp"])
+		assert.Equal(t, "/tmp/tool_cache", runnerContext["tool_cache"])
+		assert.NotEmpty(t, runnerContext["os"])
+	})
+}
+
+func TestParentDir(t *testing.T) {
+	assert.Empty(t, parentDir(""))
+	assert.Empty(t, parentDir("repo"))
+	assert.Empty(t, parentDir("/repo"))
+	assert.Equal(t, "/workspace/owner", parentDir("/workspace/owner/repo"))
+	assert.Equal(t, `C:\workspace\owner`, parentDir(`C:\workspace\owner\repo`))
+}
+
+func TestRunContextWithGithubEnvRunnerValues(t *testing.T) {
+	ctx := context.Background()
+	rc := createRunsOnRunContext(t, "ubuntu-latest")
+	rc.Config.RunnerName = "runner-1"
+	rc.Config.Secrets = map[string]string{"ACTIONS_STEP_DEBUG": "true"}
+
+	env := map[string]string{}
+	rc.withGithubEnv(ctx, &model.GithubContext{Workspace: "/workspace/owner/repo"}, env)
+
+	assert.Equal(t, "runner-1", env["RUNNER_NAME"])
+	assert.Equal(t, "self-hosted", env["RUNNER_ENVIRONMENT"])
+	assert.Equal(t, "/workspace/owner", env["RUNNER_WORKSPACE"])
+	assert.Equal(t, "1", env["RUNNER_DEBUG"])
+}

act/runner/runner.go

@@ -8,15 +8,17 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"maps"
 	"os"
 	"runtime"
 	"sync"
 	"time"
 
 	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/container"
 	"gitea.com/gitea/runner/act/model"
 
-	docker_container "github.com/docker/docker/api/types/container"
+	docker_container "github.com/moby/moby/api/types/container"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -27,58 +29,80 @@ type Runner interface {
 
 // Config contains the config for a new runner
 type Config struct {
-	Actor                              string                       // the user that triggered the event
-	Workdir                            string                       // path to working directory
-	ActionCacheDir                     string                       // path used for caching action contents
-	ActionOfflineMode                  bool                         // when offline, use caching action contents
-	BindWorkdir                        bool                         // bind the workdir to the job container
-	EventName                          string                       // name of event to run
-	EventPath                          string                       // path to JSON file to use for event.json in containers
-	DefaultBranch                      string                       // name of the main branch for this repository
-	ReuseContainers                    bool                         // reuse containers to maintain state
-	ForcePull                          bool                         // force pulling of the image, even if already present
-	ForceRebuild                       bool                         // force rebuilding local docker image action
-	LogOutput                          bool                         // log the output from docker run
-	JSONLogger                         bool                         // use json or text logger
-	LogPrefixJobID                     bool                         // switches from the full job name to the job id
-	Env                                map[string]string            // env for containers
-	Inputs                             map[string]string            // manually passed action inputs
-	Secrets                            map[string]string            // list of secrets
-	Vars                               map[string]string            // list of vars
-	Token                              string                       // GitHub token
-	InsecureSecrets                    bool                         // switch hiding output when printing to terminal
-	Platforms                          map[string]string            // list of platforms
-	Privileged                         bool                         // use privileged mode
-	UsernsMode                         string                       // user namespace to use
-	ContainerArchitecture              string                       // Desired OS/architecture platform for running containers
-	ContainerDaemonSocket              string                       // Path to Docker daemon socket
-	ContainerOptions                   string                       // Options for the job container
-	UseGitIgnore                       bool                         // controls if paths in .gitignore should not be copied into container, default true
-	GitHubInstance                     string                       // GitHub instance to use, default "github.com"
-	ContainerCapAdd                    []string                     // list of kernel capabilities to add to the containers
-	ContainerCapDrop                   []string                     // list of kernel capabilities to remove from the containers
-	AutoRemove                         bool                         // controls if the container is automatically removed upon workflow completion
-	ArtifactServerPath                 string                       // the path where the artifact server stores uploads
-	ArtifactServerAddr                 string                       // the address the artifact server binds to
-	ArtifactServerPort                 string                       // the port the artifact server binds to
-	NoSkipCheckout                     bool                         // do not skip actions/checkout
-	RemoteName                         string                       // remote name in local git repo config
-	ReplaceGheActionWithGithubCom      []string                     // Use actions from GitHub Enterprise instance to GitHub
-	ReplaceGheActionTokenWithGithubCom string                       // Token of private action repo on GitHub.
-	Matrix                             map[string]map[string]bool   // Matrix config to run
-	ContainerNetworkMode               docker_container.NetworkMode // the network mode of job containers (the value of --network)
-	ActionCache                        ActionCache                  // Use a custom ActionCache Implementation
+	Actor                              string                                        // the user that triggered the event
+	Workdir                            string                                        // path to working directory
+	ActionCacheDir                     string                                        // path used for caching action contents
+	ActionOfflineMode                  bool                                          // when offline, use cached action contents
+	ActionCloneDepth                   int                                           // limit history when cloning an action repo; 0 clones every branch in full
+	BindWorkdir                        bool                                          // bind the workdir to the job container
+	EventName                          string                                        // name of event to run
+	EventPath                          string                                        // path to JSON file to use for event.json in containers
+	DefaultBranch                      string                                        // name of the main branch for this repository
+	ReuseContainers                    bool                                          // reuse containers to maintain state
+	ForcePull                          bool                                          // force pulling of the image, even if already present
+	ForceRebuild                       bool                                          // force rebuilding local docker image action
+	LogOutput                          bool                                          // log the output from docker run
+	JSONLogger                         bool                                          // use json or text logger
+	LogPrefixJobID                     bool                                          // switches from the full job name to the job id
+	Env                                map[string]string                             // env for containers
+	Inputs                             map[string]string                             // manually passed action inputs
+	Secrets                            map[string]string                             // list of secrets
+	Vars                               map[string]string                             // list of vars
+	Token                              string                                        // GitHub token
+	InsecureSecrets                    bool                                          // switch hiding output when printing to terminal
+	Platforms                          map[string]string                             // list of platforms
+	Privileged                         bool                                          // use privileged mode
+	UsernsMode                         string                                        // user namespace to use
+	ContainerArchitecture              string                                        // Desired OS/architecture platform for running containers
+	ContainerDaemonSocket              string                                        // Path to Docker daemon socket
+	ContainerOptions                   string                                        // Options for the job container
+	UseGitIgnore                       bool                                          // controls if paths in .gitignore should not be copied into container, default true
+	GitHubInstance                     string                                        // GitHub instance to use, default "github.com"
+	ContainerCapAdd                    []string                                      // list of kernel capabilities to add to the containers
+	ContainerCapDrop                   []string                                      // list of kernel capabilities to remove from the containers
+	AutoRemove                         bool                                          // controls if the container is automatically removed upon workflow completion
+	ArtifactServerPath                 string                                        // the path where the artifact server stores uploads
+	ArtifactServerAddr                 string                                        // the address the artifact server binds to
+	ArtifactServerPort                 string                                        // the port the artifact server binds to
+	NoSkipCheckout                     bool                                          // do not skip actions/checkout
+	DisableActEnv                      bool                                          // do not inject the ACT=true environment variable into jobs
+	RemoteName                         string                                        // remote name in local git repo config
+	ReplaceGheActionWithGithubCom      []string                                      // Use actions from GitHub Enterprise instance to GitHub
+	ReplaceGheActionTokenWithGithubCom string                                        // Token of private action repo on GitHub.
+	Matrix                             map[string]map[string]bool                    // Matrix config to run
+	ContainerNetworkMode               docker_container.NetworkMode                  // the network mode of job containers (the value of --network)
+	ContainerNetworkCreateOptions      container.NewDockerNetworkCreateExecutorInput // the default network create options
+	ActionCache                        ActionCache                                   // Use a custom ActionCache Implementation
+	ProxyEnv                           map[string]string                             // the proxy variables the job runs with, also given to service containers and image builds
 
-	PresetGitHubContext   *model.GithubContext         // the preset github context, overrides some fields like DefaultBranch, Env, Secrets etc.
-	EventJSON             string                       // the content of JSON file to use for event.json in containers, overrides EventPath
-	ContainerNamePrefix   string                       // the prefix of container name
-	ContainerMaxLifetime  time.Duration                // the max lifetime of job containers
-	DefaultActionInstance string                       // the default actions web site
-	PlatformPicker        func(labels []string) string // platform picker, it will take precedence over Platforms if isn't nil
-	JobLoggerLevel        *log.Level                   // the level of job logger
-	ValidVolumes          []string                     // only volumes (and bind mounts) in this slice can be mounted on the job container or service containers
-	InsecureSkipTLS       bool                         // whether to skip verifying TLS certificate of the Gitea instance
-	MaxParallel           int                          // max parallel jobs to run across all workflows (0 = no limit, uses CPU count)
+	PresetGitHubContext   *model.GithubContext // the preset github context, overrides some fields like DefaultBranch, Env, Secrets etc.
+	EventJSON             string               // the content of JSON file to use for event.json in containers, overrides EventPath
+	ContainerNamePrefix   string               // the prefix of container name
+	ContainerMaxLifetime  time.Duration        // the max lifetime of job containers
+	CleanWorkdir          bool                 // remove host executor workdir on teardown
+	DefaultActionInstance string               // the default actions web site
+	// DefaultActionInstanceIsSelfHosted reports whether DefaultActionInstance is this
+	// self-hosted Gitea (DEFAULT_ACTIONS_URL=self). It gates token trust: only then may the
+	// task token be attached to action clone URLs on DefaultActionInstance's host, which can
+	// differ from GitHubInstance when the runner registered with a different hostname than
+	// AppURL. It is never set for github.com or a GithubMirror, so the token stays on-instance.
+	DefaultActionInstanceIsSelfHosted bool
+	PlatformPicker                    func(labels []string) string // platform picker, it will take precedence over Platforms if isn't nil
+	JobLoggerLevel                    *log.Level                   // the level of job logger
+	ValidVolumes                      []string                     // only volumes (and bind mounts) in this slice can be mounted on the job container or service containers
+	InsecureSkipTLS                   bool                         // whether to skip verifying TLS certificate of the Gitea instance
+	MaxParallel                       int                          // max parallel jobs to run across all workflows (0 = no limit, uses CPU count)
+	AllocatePTY                       bool                         // allocate a pseudo-TTY for each step's process
+	RunnerName                        string                       // name this runner registered with, reported as `runner.name`, defaults to the hostname
+	JobStartedHook                    string                       // script run inside the job environment before the job's first step; ACTIONS_RUNNER_HOOK_JOB_STARTED is read from Env when empty
+	JobCompletedHook                  string                       // script run inside the job environment after the job's last step; ACTIONS_RUNNER_HOOK_JOB_COMPLETED is read from Env when empty
+}
+
+// RunnerDebug reports whether debug logging is on, exposed as `runner.debug` and
+// RUNNER_DEBUG. Only the secret also makes the reporter keep ::debug:: output, the env
+// is accepted for `exec` and for runners configured with it.
+func (c Config) RunnerDebug() bool {
+	return c.Secrets["ACTIONS_STEP_DEBUG"] == "true" || c.Env["ACTIONS_STEP_DEBUG"] == "true"
 }
 
 // GetToken: Adapt to Gitea
@@ -90,6 +114,17 @@ func (c Config) GetToken() string {
 	return token
 }
 
+// DefaultActionURL returns the host used for implicit remote actions.
+func (c Config) DefaultActionURL() string {
+	if c.DefaultActionInstance != "" {
+		return c.DefaultActionInstance
+	}
+	if c.GitHubInstance != "" {
+		return c.GitHubInstance
+	}
+	return "github.com"
+}
+
 type caller struct {
 	runContext *RunContext
 
@@ -113,6 +148,11 @@ func New(runnerConfig *Config) (Runner, error) {
 }
 
 func (runner *runnerImpl) configure() (Runner, error) {
+	if runner.config.RunnerName == "" {
+		// Callers that do not register, such as `exec`, still get a `runner.name`.
+		runner.config.RunnerName, _ = os.Hostname()
+	}
+
 	runner.eventJSON = "{}"
 	if runner.config.EventJSON != "" {
 		runner.eventJSON = runner.config.EventJSON
@@ -234,10 +274,20 @@ func (runner *runnerImpl) NewPlanExecutor(plan *model.Plan) common.Executor {
 							return err
 						}
 
-						return executor(common.WithJobErrorContainer(WithJobLogger(ctx, rc.Run.JobID, jobName, rc.Config, &rc.Masks, matrix)))
+						jobCtx := common.WithJobErrorContainer(WithJobLogger(ctx, rc.Run.JobID, jobName, rc.Config, &rc.Masks, matrix))
+						jobCtx, cancelTimeout := applyJobTimeout(jobCtx, rc, job)
+						defer cancelTimeout()
+						return executor(jobCtx)
 					})
 				}
-				pipeline = append(pipeline, common.NewParallelExecutor(maxParallel, stageExecutor...))
+				// Run all matrix combinations of this job, then drop its aggregation mutex: the
+				// combos are the only users of it, so once they finish the jobMutexes entry can be
+				// released, keeping the map from growing unbounded over a long-lived runner.
+				stageParallel := common.NewParallelExecutor(maxParallel, stageExecutor...)
+				pipeline = append(pipeline, func(ctx context.Context) error {
+					defer jobMutexes.Delete(job)
+					return stageParallel(ctx)
+				})
 			}
 
 			// For pipeline execution:
@@ -282,7 +332,7 @@ func handleFailure(plan *model.Plan) common.Executor {
 	return func(ctx context.Context) error {
 		for _, stage := range plan.Stages {
 			for _, run := range stage.Runs {
-				if run.Job().Result == "failure" {
+				if run.Job().Result == "failure" && !run.Job().ContinueOnError {
 					return fmt.Errorf("Job '%s' failed", run.String())
 				}
 			}
@@ -321,6 +371,11 @@ func (runner *runnerImpl) newRunContext(ctx context.Context, run *model.Run, mat
 	}
 	rc.ExprEval = rc.NewExpressionEvaluator(ctx)
 	rc.Name = rc.ExprEval.Interpolate(ctx, run.String())
+	// Snapshot the job's pristine output expressions now, before any matrix combo runs and
+	// rewrites the shared Job.Outputs (see interpolateOutputs).
+	if job := run.Job(); job != nil {
+		rc.outputTemplate = maps.Clone(job.Outputs)
+	}
 
 	return rc
 }