chore(deps): update dependencies (#1365)

Co-authored-by: Renovate Bot <[email protected]>

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

@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7
       with:
-        node-version: 24
+        node-version: 26
     - run: make lint-pr-title
       env:
         PR_TITLE: ${{ github.event.pull_request.title }}

.gitea/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
       # daemon retains them between runs, and their digest pins skip the registry when it has them.
       - name: pre-pull test images
         env:
-          TEST_JOB_IMAGE: node:24-bookworm-slim@sha256:55fb5f5a527ea2c5c4a95f963e48ef90aa38c7b346054fdc8ee9957a2b55d205 # renovate: datasource=docker
+          TEST_JOB_IMAGE: node:26-bookworm-slim@sha256:bc0a2afd3b74ce12222fc8bab99271e66257f021078f5f4a5d687a77d280c1d9 # renovate: datasource=docker
           TEST_SERVICE_IMAGE: nginx:alpine@sha256:a3554c0d0b48177b1413c26e01f695334428020d9df01243fbae3e11cfd17417 # renovate: datasource=docker
         run: |
           for image in "$TEST_JOB_IMAGE" "$TEST_SERVICE_IMAGE"; do

DEVELOPMENT.md

@@ -57,7 +57,15 @@ Each lives in `internal/pkg/action/<name>` and is registered in `builtinActions`
 
 `make test-e2e` runs the runner against `E2E_GITEA_IMAGE`. It defaults to the nightly image.
 It requires Docker and is excluded from `make test`. CI runs stable and nightly variants in
-parallel.
+parallel. Outside a container it runs `go test` in a Linux container on its own network, as CI does,
+so both take the same paths. `E2E_ARGS` passes extra flags, e.g. `make test-e2e E2E_ARGS='-run TestCompatibility/dispatch'`.
 
-The suite shares one Gitea and regular runner. Cache and ephemeral scenarios use isolated
+The `cli_*` scenarios build the binary and drive `register` and `daemon` as a user would, including `--once`,
+`--labels` and shutdown with a running job. `failure_paths` covers failed, skipped and tolerated jobs, `job_timeout`
+a job killed at the runner's deadline. `label_routing` and `capacity` cover scheduling, `reconnect` drops the
+connection to Gitea through a proxy, and `host_mode` and `reusable_workflow` cover host labels and `workflow_call`.
+`dispatch`, `failure_paths` and `reusable_workflow` run in every mode: through the daemon and `exec`, each on
+Docker and Kubernetes.
+
+The suite shares one Gitea, regular runner and k3s cluster. Cache and ephemeral scenarios use isolated
 repository runners. A run path is `<workflow>@<ref>` and a log row is `<timestamp>Z <payload>`.

Dockerfile

@@ -19,7 +19,7 @@ RUN --mount=type=cache,target=/go/pkg/mod \
 ### DIND VARIANT
 #
 #
-FROM docker:29.9.1-dind AS dind
+FROM docker:29.9.2-dind AS dind
 
 ARG VERSION=dev
 
@@ -41,7 +41,7 @@ ENTRYPOINT ["s6-svscan","/etc/s6"]
 ### DIND-ROOTLESS VARIANT
 #
 #
-FROM docker:29.9.1-dind-rootless AS dind-rootless
+FROM docker:29.9.2-dind-rootless AS dind-rootless
 
 ARG VERSION=dev
 

Makefile

@@ -4,7 +4,7 @@ GO ?= go
 HAS_GO = $(shell hash $(GO) > /dev/null 2>&1 && echo "GO" || echo "NOGO" )
 
 PODMAN_TEST_IMAGE ?= quay.io/containers/podman:v5.8.9-immutable@sha256:87f42f37fa85b421664c30b8f5f9cfc23920057f5e5fcadf0b6f68d9edc6d415 # renovate: datasource=docker
-E2E_JOB_IMAGE ?= docker.gitea.com/runner-images:ubuntu-latest@sha256:8856b200466e9a5af9cc0d4de4ca96f73547833bcdddf9a567189ff772c4d372 # renovate: datasource=docker
+E2E_JOB_IMAGE ?= docker.gitea.com/runner-images:ubuntu-latest@sha256:657378e5cfd898e36f820459c60ef8e69be8fcda9fd354e4381a8b654d091bbc # renovate: datasource=docker
 SERVICE_IMAGE ?= nginx:1.31.7-alpine@sha256:892bb2152464f0c5d8972593a5f5afaf8054552580b699d95f8ff4af08c2d33d # renovate: datasource=docker
 E2E_GITEA_IMAGE ?= gitea/gitea:main-nightly
 E2E_K3S_IMAGE ?= rancher/k3s:v1.37.1-k3s1@sha256:ca7f37d993d82ef0dcdcfecb2e0e2618ea541dbaffc620c8cedebe01a82acd0d # renovate: datasource=docker
@@ -154,7 +154,7 @@ E2E_CONCURRENCY ?= 8
 
 .PHONY: test-e2e
 test-e2e: ## run Gitea compatibility tests against E2E_GITEA_IMAGE
-	@E2E_CONCURRENCY=$(E2E_CONCURRENCY) E2E_GITEA_IMAGE=$(E2E_GITEA_IMAGE) E2E_K3S_IMAGE=$(E2E_K3S_IMAGE) E2E_JOB_IMAGE=$(E2E_JOB_IMAGE) GO=$(GO) SERVICE_IMAGE=$(SERVICE_IMAGE) ./tools/test-e2e.sh
+	@E2E_CONCURRENCY=$(E2E_CONCURRENCY) E2E_GITEA_IMAGE=$(E2E_GITEA_IMAGE) E2E_K3S_IMAGE=$(E2E_K3S_IMAGE) E2E_JOB_IMAGE=$(E2E_JOB_IMAGE) GO=$(GO) SERVICE_IMAGE=$(SERVICE_IMAGE) ./tools/test-e2e.sh $(E2E_ARGS)
 
 .PHONY: install
 install: $(GOFILES) ## install the runner binary via `go install`

README.md

@@ -303,6 +303,8 @@ Use `uses: builtin:checkout` to check out a repository without downloading `acti
 
 Each runner starts its own cache server, so runners do not share cached entries. A runner in a container on the jobs' Docker daemon attaches itself to each job network, so jobs reach its cache without extra setup.
 
+As on GitHub, a job restores caches saved for its own ref, its pull request's base branch and the default branch, so a cache saved by a pull request is only restored by that pull request.
+
 **Sharing a cache between runners**
 
 Run one `gitea-runner cache-server` and point every runner at it, using the same secret everywhere, for example from `openssl rand -hex 32`:

act/artifactcache/doc.go

@@ -6,7 +6,5 @@
 //
 // Inspired by https://github.com/sp-ricard-valverde/github-act-cache-server
 //
-// TODO: Authorization
-// TODO: Restrictions for accessing a cache, see https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#restrictions-for-accessing-a-cache
 // TODO: Force deleting cache entries, see https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#force-deleting-cache-entries
 package artifactcache

act/artifactcache/handler.go

@@ -59,6 +59,10 @@ type credKey struct{}
 type JobCredential struct {
 	Repo string `json:"repo"`
 
+	Ref        string `json:"ref"`
+	BaseRef    string `json:"base_ref"`
+	DefaultRef string `json:"default_ref"`
+
 	// Results is the instance whose artifact service this server forwards for the job, and
 	// InsecureTLS how the runner reaches it; see results.go.
 	Results     string `json:"-"`
@@ -68,6 +72,10 @@ type JobCredential struct {
 	PublicURL string `json:"public_url"`
 }
 
+func (cred JobCredential) owns(cache *Cache) bool {
+	return cache.Repo == cred.Repo && cache.Ref == cred.Ref
+}
+
 // credEntry holds a registered job's credential along with an active
 // registration count. RegisterJob is reference-counted so that if two tasks
 // briefly share an ACTIONS_RUNTIME_TOKEN — e.g. a runner that retries a task
@@ -653,7 +661,7 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request) {
 	}
 	defer db.Close()
 
-	cache, err := h.lookupCache(db, cred.Repo, keys, version)
+	cache, err := h.lookupCache(db, cred, keys, version)
 	if err != nil {
 		h.responseJSON(w, r, 500, err)
 		return
@@ -669,26 +677,27 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
-// 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 *cacheDB, repo string, keys []string, version string) (*Cache, error) {
-	cache, err := findCache(db, repo, keys, version)
-	if err != nil || cache == nil {
-		return nil, err
+// lookupCache returns the entry to restore or (nil, nil), dropping matches whose blob was pruned.
+func (h *Handler) lookupCache(db *cacheDB, cred JobCredential, keys []string, version string) (*Cache, error) {
+	for {
+		cache, err := findCache(db, cred, 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 {
+			// Handing out a download URL counts as access, or eviction could drop the entry between
+			// this call and the GET that follows it.
+			h.touch(db, cache)
+			return cache, nil
+		}
+		if !h.deleteCache(db, cache) {
+			return nil, nil //nolint:nilnil // absence is not an error here
+		}
 	}
-	ok, err := h.storage.Exist(cache.ID)
-	if err != nil {
-		return nil, err
-	}
-	if !ok {
-		h.deleteCache(db, cache)
-		return nil, nil //nolint:nilnil // absence is not an error here
-	}
-	// Handing out a download URL counts as access, or eviction could drop the entry between
-	// this call and the GET that follows it.
-	h.touch(db, cache)
-	return cache, nil
 }
 
 // POST /_apis/artifactcache/caches
@@ -700,7 +709,7 @@ func (h *Handler) reserve(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	cache := &Cache{Repo: cred.Repo, Key: api.Key, Version: api.Version, Size: api.Size}
+	cache := &Cache{Repo: cred.Repo, Ref: cred.Ref, Key: api.Key, Version: api.Version, Size: api.Size}
 	if cache.Size == 0 {
 		cache.Size = -1
 	}
@@ -749,7 +758,7 @@ func (h *Handler) upload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if cache.Repo != cred.Repo {
+	if !cred.owns(cache) {
 		h.responseJSON(w, r, 403, fmt.Errorf("cache %d: forbidden", id))
 		return
 	}
@@ -808,7 +817,7 @@ func (h *Handler) commit(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if cache.Repo != cred.Repo {
+	if !cred.owns(cache) {
 		h.responseJSON(w, r, 403, fmt.Errorf("cache %d: forbidden", id))
 		return
 	}
@@ -1071,25 +1080,35 @@ func (h *Handler) signedArtifactURL(cred JobCredential, cacheID uint64, exp time
 	return h.signedURL(cred, apiPath+"/artifacts", "", cacheID, exp)
 }
 
-// if not found, return (nil, nil) instead of an error.
-func findCache(db *cacheDB, repo string, keys []string, version string) (*Cache, error) {
-	for _, prefix := range keys {
-		// if a key in the list matches exactly, don't return partial matches
-		exact, err := findExactCache(db, repo, prefix, version, true)
-		if err != nil {
-			return nil, err
+// findCache tries every key in one ref before the next ref, and returns (nil, nil) on a miss.
+func findCache(db *cacheDB, cred JobCredential, keys []string, version string) (*Cache, error) {
+	refs := []string{cred.Ref}
+	for _, ref := range []string{cred.BaseRef, cred.DefaultRef} {
+		if ref != "" && !slices.Contains(refs, ref) {
+			refs = append(refs, ref)
 		}
-		if exact != nil {
-			return exact, nil
-		}
-		caches, err := db.find(func(cache *Cache) bool {
-			return cache.Repo == repo && strings.HasPrefix(cache.Key, prefix) && cache.Version == version && cache.Complete
-		})
-		if err != nil {
-			return nil, fmt.Errorf("find cache: %w", err)
-		}
-		if cache := latest(caches, (*Cache).createdAtNano); cache != nil {
-			return cache, nil
+	}
+	caches, err := db.find(func(cache *Cache) bool {
+		return cache.Repo == cred.Repo && cache.Version == version && cache.Complete && slices.Contains(refs, cache.Ref) &&
+			slices.ContainsFunc(keys, func(prefix string) bool { return strings.HasPrefix(cache.Key, prefix) })
+	})
+	if err != nil {
+		return nil, fmt.Errorf("find cache: %w", err)
+	}
+	for _, ref := range refs {
+		for _, prefix := range keys {
+			var exact, partial []*Cache
+			for _, cache := range caches {
+				if cache.Ref == ref && cache.Key == prefix {
+					exact = append(exact, cache)
+				} else if cache.Ref == ref && strings.HasPrefix(cache.Key, prefix) {
+					partial = append(partial, cache)
+				}
+			}
+			// if a key in the list matches exactly, don't return partial matches
+			if cache := cmp.Or(latest(exact, (*Cache).createdAtNano), latest(partial, (*Cache).createdAtNano)); cache != nil {
+				return cache, nil
+			}
 		}
 	}
 	return nil, nil //nolint:nilnil // pre-existing issue from nektos/act
@@ -1111,9 +1130,9 @@ func latest(caches []*Cache, stamp func(*Cache) int64) *Cache {
 // 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 *cacheDB, repo, key, version string, complete bool) (*Cache, error) {
+func findExactCache(db *cacheDB, cred JobCredential, key, version string, complete bool) (*Cache, error) {
 	caches, err := db.find(func(cache *Cache) bool {
-		return cache.Key == key && cache.Repo == repo && cache.Version == version && cache.Complete == complete
+		return cred.owns(cache) && cache.Key == key && cache.Version == version && cache.Complete == complete
 	})
 	if err != nil {
 		return nil, fmt.Errorf("find cache: %w", err)
@@ -1280,13 +1299,12 @@ func (h *Handler) evictExpired(db *cacheDB) {
 	h.sweep(db, func(cache *Cache) bool { return cache.UsedAt < expired })
 }
 
-// evictSuperseded removes entries a newer one with the same key and version replaced. The
-// grouping includes Repo so two repos sharing a (key, version) do not evict each other.
+// evictSuperseded removes entries a newer one with the same repo, ref, key and version replaced.
 func (h *Handler) evictSuperseded(db *cacheDB) {
-	type entry struct{ repo, key, version string }
+	type entry struct{ repo, ref, key, version string }
 	groups := make(map[entry][]*Cache)
 	for _, cache := range h.caches(db, func(cache *Cache) bool { return cache.Complete }) {
-		group := entry{cache.Repo, cache.Key, cache.Version}
+		group := entry{cache.Repo, cache.Ref, cache.Key, cache.Version}
 		groups[group] = append(groups[group], cache)
 	}
 	for _, caches := range groups {

act/artifactcache/handler_test.go

@@ -759,11 +759,55 @@ func TestHandler_PrefixUsesNewestReservationWithinSecond(t *testing.T) {
 	db, err := handler.openDB()
 	require.NoError(t, err)
 	defer db.Close()
-	cache, err := findCache(db, testRepo, []string{"deps-"}, "v")
+	cache, err := findCache(db, JobCredential{Repo: testRepo}, []string{"deps-"}, "v")
 	require.NoError(t, err)
 	require.Equal(t, newer, cache)
 }
 
+func TestHandler_RestoreRefs(t *testing.T) {
+	t.Parallel()
+	const main, release, pull = "refs/heads/main", "refs/heads/release", "refs/pull/1/head"
+	now := time.Now().Unix()
+	entry := func(ref, key string, age int64) *Cache {
+		return &Cache{Repo: testRepo, Ref: ref, Key: key, Version: "v", Complete: true, CreatedAt: now - 3600 + age, UsedAt: now}
+	}
+	exactOnMain := entry(main, "deps-exact", -1)
+	onRelease := entry(release, "deps-release", 0)
+	onMain := entry(main, "deps-main", 1)
+	onPull := entry(pull, "deps-pull", 2)
+	unscoped := entry("", "deps-unscoped", 3)
+	handler := newTestHandler(t, Policy{}, exactOnMain, onRelease, onMain, onPull, unscoped, entry("refs/pull/2/head", "deps-lost", 4))
+	for _, cache := range []*Cache{exactOnMain, onRelease, onMain, onPull, unscoped} {
+		writeBlob(t, handler, cache.ID)
+	}
+
+	db, err := handler.openDB()
+	require.NoError(t, err)
+	defer db.Close()
+
+	for _, tc := range []struct {
+		name string
+		cred JobCredential
+		keys []string
+		want *Cache
+	}{
+		{"the default branch never restores what a pull request wrote", JobCredential{Ref: main, DefaultRef: main}, []string{"deps-"}, onMain},
+		{"a pull request restores its own entry first", JobCredential{Ref: pull, BaseRef: release, DefaultRef: main}, []string{"deps-"}, onPull},
+		{"a pull request falls back past a lost blob to its base branch before the default branch", JobCredential{Ref: "refs/pull/2/head", BaseRef: release, DefaultRef: main}, []string{"deps-"}, onRelease},
+		{"a branch does not restore a sibling branch", JobCredential{Ref: "refs/heads/other", DefaultRef: main}, []string{"deps-"}, onMain},
+		{"a prefix in the own ref wins over an exact key in the default branch", JobCredential{Ref: release, DefaultRef: main}, []string{"deps-exact", "deps-"}, onRelease},
+		{"a job with a ref never restores entries saved without one", JobCredential{Ref: "refs/heads/other"}, []string{"deps-"}, nil},
+		{"a job without a ref only restores entries saved without one", JobCredential{}, []string{"deps-"}, unscoped},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			tc.cred.Repo = testRepo
+			cache, err := handler.lookupCache(db, tc.cred, tc.keys, "v")
+			require.NoError(t, err)
+			assert.Equal(t, tc.want, cache)
+		})
+	}
+}
+
 func TestHandler_evictOnCommit(t *testing.T) {
 	t.Parallel()
 	full := &Cache{Repo: testRepo, Key: "full", Version: "v", Complete: true, Size: 4 * miB, UsedAt: time.Now().Add(-time.Hour).Unix()}
@@ -938,6 +982,7 @@ func TestHandler_CrossRepoIsolation(t *testing.T) {
 	defer handler.Close()
 	handler.RegisterJob("token-a", JobCredential{Repo: "owner/repoA"})
 	handler.RegisterJob("token-b", JobCredential{Repo: "owner/repoB"})
+	handler.RegisterJob("token-a-pull", JobCredential{Repo: "owner/repoA", Ref: "refs/pull/1/head"})
 
 	base := handler.ExternalURL() + apiPath
 	key := "shared-key"
@@ -972,13 +1017,20 @@ func TestHandler_CrossRepoIsolation(t *testing.T) {
 	resp.Body.Close()
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
 
-	req, err = http.NewRequest(http.MethodPatch, fmt.Sprintf("%s/caches/%d", base, id), bytes.NewReader([]byte("poison")))
-	require.NoError(t, err)
-	req.Header.Set("Content-Range", "bytes 0-5/*")
-	resp, err = clientB.Do(req)
-	require.NoError(t, err)
-	resp.Body.Close()
-	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+	for _, client := range []*http.Client{clientB, {Transport: &bearerTransport{token: "token-a-pull"}}} {
+		req, err = http.NewRequest(http.MethodPatch, fmt.Sprintf("%s/caches/%d", base, id), bytes.NewReader([]byte("poison")))
+		require.NoError(t, err)
+		req.Header.Set("Content-Range", "bytes 0-5/*")
+		resp, err = client.Do(req)
+		require.NoError(t, err)
+		resp.Body.Close()
+		assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+
+		resp, err = client.Post(fmt.Sprintf("%s/caches/%d", base, id), "", nil)
+		require.NoError(t, err)
+		resp.Body.Close()
+		assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+	}
 }
 
 func TestHandler_ArtifactSignature(t *testing.T) {
@@ -1083,49 +1135,20 @@ func TestHandler_ArtifactSignatureDownload(t *testing.T) {
 	assert.Equal(t, content, body)
 }
 
-func TestHandler_GC_PerRepoDedup(t *testing.T) {
+func TestHandler_GC_DedupPerRepoAndRef(t *testing.T) {
 	t.Parallel()
-	dir := filepath.Join(t.TempDir(), "artifactcache")
-	handler, err := StartHandler(Options{Dir: dir})
-	require.NoError(t, err)
-	defer handler.Close()
-	handler.RegisterJob("tok-a", JobCredential{Repo: "owner/repoA"})
-	handler.RegisterJob("tok-b", JobCredential{Repo: "owner/repoB"})
-
-	key := "shared-dedup-key"
-	version := "c19da02a2bd7e77277f1ac29ab45c09b7d46a4ee758284e26bb3045ad11d9d20"
-
-	db, err := handler.openDB()
-	require.NoError(t, err)
 	now := time.Now().Unix()
 	stale := time.Now().Add(-inUseGrace - time.Minute).Unix()
-	a := &Cache{Repo: "owner/repoA", Key: key, Version: version, Complete: true, CreatedAt: stale, UsedAt: stale, Size: 1}
-	b := &Cache{Repo: "owner/repoB", Key: key, Version: version, Complete: true, CreatedAt: now, UsedAt: now, Size: 1}
-	require.NoError(t, handler.insertCache(db, a))
-	require.NoError(t, handler.insertCache(db, b))
-	require.NoError(t, handler.storage.Write(a.ID, 0, strings.NewReader("a")))
-	_, err = handler.storage.Commit(a.ID, 1)
-	require.NoError(t, err)
-	require.NoError(t, handler.storage.Write(b.ID, 0, strings.NewReader("b")))
-	_, err = handler.storage.Commit(b.ID, 1)
-	require.NoError(t, err)
-	require.NoError(t, db.Close())
-
+	entries := []*Cache{
+		{Repo: "owner/repoA", Key: "shared", Version: "v", Complete: true, CreatedAt: stale, UsedAt: stale, Size: 1},
+		{Repo: "owner/repoB", Key: "shared", Version: "v", Complete: true, CreatedAt: now, UsedAt: now, Size: 1},
+		{Repo: "owner/repoA", Ref: "refs/pull/1/head", Key: "shared", Version: "v", Complete: true, CreatedAt: now, UsedAt: now, Size: 1},
+	}
+	handler := newTestHandler(t, Policy{}, entries...)
 	handler.gcAt = time.Time{}
 	handler.gcCache()
 
-	db, err = handler.openDB()
-	require.NoError(t, err)
-	defer db.Close()
-	after, err := db.find(func(cache *Cache) bool { return cache.Key == key && cache.Version == version })
-	require.NoError(t, err)
-
-	repos := make(map[string]bool)
-	for _, c := range after {
-		repos[c.Repo] = true
-	}
-	assert.True(t, repos["owner/repoA"], "repoA's cache must survive dedup against repoB")
-	assert.True(t, repos["owner/repoB"], "repoB's cache must survive dedup against repoA")
+	assert.Len(t, keptKeys(t, handler, entries), len(entries))
 }
 
 func TestHandler_InternalAPI_Disabled(t *testing.T) {
@@ -1190,10 +1213,10 @@ func TestHandler_InternalAPI_AuthAndUsage(t *testing.T) {
 		}
 
 		assert.Equal(t, http.StatusUnauthorized, probe("via-internal-api"))
-		assert.Equal(t, http.StatusOK, post("/_internal/register", secret, `{"token":"via-internal-api","repo":"owner/repo","public_url":"http://runner.example","results":"https://gitea.example","insecure_tls":true}`))
+		assert.Equal(t, http.StatusOK, post("/_internal/register", secret, `{"token":"via-internal-api","repo":"owner/repo","ref":"refs/pull/1/head","base_ref":"refs/heads/release","default_ref":"refs/heads/main","public_url":"http://runner.example","results":"https://gitea.example","insecure_tls":true}`))
 		cred, ok := handler.lookupCredential("via-internal-api")
 		require.True(t, ok)
-		assert.Equal(t, JobCredential{Repo: testRepo, PublicURL: "http://runner.example"}, cred)
+		assert.Equal(t, JobCredential{Repo: testRepo, Ref: "refs/pull/1/head", BaseRef: "refs/heads/release", DefaultRef: "refs/heads/main", PublicURL: "http://runner.example"}, cred)
 		assert.NotEqual(t, http.StatusUnauthorized, probe("via-internal-api"))
 		assert.Equal(t, http.StatusOK, post("/_internal/revoke", secret, `{"token":"via-internal-api"}`))
 		assert.Equal(t, http.StatusUnauthorized, probe("via-internal-api"))

act/artifactcache/handler_v2.go

@@ -73,7 +73,7 @@ func (h *Handler) v2CreateCacheEntry(w http.ResponseWriter, r *http.Request) {
 	// 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 {
+	if existing, err := findExactCache(db, cred, req.Key, req.Version, true); err != nil {
 		h.twirpError(w, r, twirpInternal, err)
 		return
 	} else if existing != nil {
@@ -84,7 +84,7 @@ func (h *Handler) v2CreateCacheEntry(w http.ResponseWriter, r *http.Request) {
 
 	// A second live reservation is finalized by whichever job calls last, against the other's upload.
 	owner := hashedToken(bearerToken(r))
-	if pending, err := findExactCache(db, cred.Repo, req.Key, req.Version, false); err != nil {
+	if pending, err := findExactCache(db, cred, req.Key, req.Version, false); err != nil {
 		h.twirpError(w, r, twirpInternal, err)
 		return
 	} else if pending != nil && pending.UsedAt > time.Now().Add(-uploadStallTimeout).Unix() {
@@ -103,6 +103,7 @@ func (h *Handler) v2CreateCacheEntry(w http.ResponseWriter, r *http.Request) {
 	now := time.Now()
 	cache := &Cache{
 		Repo:           cred.Repo,
+		Ref:            cred.Ref,
 		Key:            req.Key,
 		Version:        req.Version,
 		Owner:          owner,
@@ -137,13 +138,13 @@ func (h *Handler) v2FinalizeCacheEntryUpload(w http.ResponseWriter, r *http.Requ
 	}
 	defer db.Close()
 
-	cache, err := findExactCache(db, cred.Repo, req.Key, req.Version, false)
+	cache, err := findExactCache(db, cred, req.Key, req.Version, false)
 	if err == nil && cache != nil && cache.Owner != hashedToken(bearerToken(r)) {
 		cache = nil // not the reservation this job made, so not this job's to commit
 	}
 	if err == nil && cache == nil {
 		// A retry whose first response was lost finds the entry already committed.
-		cache, err = findExactCache(db, cred.Repo, req.Key, req.Version, true)
+		cache, err = findExactCache(db, cred, req.Key, req.Version, true)
 	}
 	if err != nil {
 		h.twirpError(w, r, twirpInternal, err)
@@ -186,7 +187,7 @@ func (h *Handler) v2GetCacheEntryDownloadURL(w http.ResponseWriter, r *http.Requ
 	}
 	defer db.Close()
 
-	cache, err := h.lookupCache(db, cred.Repo, req.keys(), req.Version)
+	cache, err := h.lookupCache(db, cred, req.keys(), req.Version)
 	if err != nil {
 		h.twirpError(w, r, twirpInternal, err)
 		return

act/artifactcache/handler_v2_test.go

@@ -231,6 +231,24 @@ func TestCacheServiceV2Lookups(t *testing.T) {
 		got := v2Call(t, handler, otherClient, "GetCacheEntryDownloadURL", map[string]any{"key": "deps-abc", "version": "v1"})
 		assert.Equal(t, false, got["ok"])
 	})
+
+	t.Run("each ref saves and restores its own entry for the same key", func(t *testing.T) {
+		clients := map[string]*http.Client{"x": testClient}
+		for _, ref := range []string{"y", "z"} {
+			handler.RegisterJob(ref, JobCredential{Repo: testRepo, Ref: "refs/pull/" + ref + "/head"})
+			clients[ref] = &http.Client{Transport: &bearerTransport{token: ref}}
+			created := v2Call(t, handler, clients[ref], "CreateCacheEntry", map[string]any{"key": "deps-abc", "version": "v1"})
+			require.Equal(t, true, created["ok"])
+			require.Equal(t, http.StatusCreated, putBlob(t, created["signed_upload_url"].(string), []byte(ref)))
+		}
+		for _, ref := range []string{"y", "z"} {
+			require.Equal(t, true, v2Call(t, handler, clients[ref], "FinalizeCacheEntryUpload", map[string]any{"key": "deps-abc", "version": "v1", "size_bytes": 1})["ok"])
+		}
+		for content, client := range clients {
+			got := v2Call(t, handler, client, "GetCacheEntryDownloadURL", map[string]any{"key": "deps-abc", "version": "v1"})
+			assert.Equal(t, content, string(getURL(t, got["signed_download_url"].(string))))
+		}
+	})
 }
 
 func TestCacheServiceV2RefusalsAreTwirp(t *testing.T) {

act/artifactcache/model.go

@@ -15,6 +15,7 @@ type Request struct {
 type Cache struct {
 	ID             uint64 `json:"id"`
 	Repo           string `json:"repo"`
+	Ref            string `json:"ref,omitzero"`
 	Key            string `json:"key"`
 	Version        string `json:"version"`
 	Size           int64  `json:"cacheSize"`

act/artifacts/server.go

@@ -218,6 +218,7 @@ func Serve(ctx context.Context, artifactPath, addr, port string) context.CancelF
 	logger.Debugf("Artifacts base path '%s'", artifactPath)
 	uploads(router, artifactPath)
 	downloads(router, artifactPath)
+	registerV4(router, artifactPath)
 
 	server := &http.Server{
 		Addr:              net.JoinHostPort(addr, port),

act/artifacts/server_test.go

@@ -28,6 +28,7 @@ func TestArtifactFlow(t *testing.T) {
 	router := http.NewServeMux()
 	uploads(router, artifactPath)
 	downloads(router, artifactPath)
+	registerV4(router, artifactPath)
 	server := httptest.NewServer(router)
 	defer server.Close()
 
@@ -174,6 +175,92 @@ func TestArtifactFlow(t *testing.T) {
 		require.Equal(t, http.StatusOK, status)
 		require.Equal(t, content, string(data))
 	})
+
+	t.Run("v4", func(t *testing.T) {
+		const artifactRef = `"workflow_run_backend_id":"7","name":"50% art@v1"`
+		call := func(method, body string) (int, map[string]any) {
+			status, data := request(t, http.MethodPost, baseURL+artifactServicePath+"/"+method, strings.NewReader(body), nil)
+			var out map[string]any
+			require.NoError(t, json.Unmarshal(data, &out), string(data))
+			return status, out
+		}
+		put := func(rawURL, body string) int {
+			status, _ := request(t, http.MethodPut, rawURL, strings.NewReader(body), nil)
+			return status
+		}
+		download := func() (string, http.Header) {
+			status, signed := call("GetSignedArtifactURL", "{"+artifactRef+"}")
+			require.Equal(t, http.StatusOK, status, signed)
+			resp, err := client.Get(signed["signedUrl"].(string))
+			require.NoError(t, err)
+			defer resp.Body.Close()
+			require.Equal(t, http.StatusOK, resp.StatusCode)
+			body, err := io.ReadAll(resp.Body)
+			require.NoError(t, err)
+			return string(body), resp.Header
+		}
+
+		status, created := call("CreateArtifact", "{"+artifactRef+"}")
+		require.Equal(t, http.StatusOK, status, created)
+		upload := created["signedUploadUrl"].(string)
+		require.Equal(t, http.StatusCreated, put(upload+"&comp=block&blockid=Yg", "world"))
+		require.Equal(t, http.StatusCreated, put(upload+"&comp=block&blockid=YQ", "hello "))
+		for attempt := range 2 {
+			require.Equal(t, http.StatusCreated, put(upload+"&comp=blocklist", `<?xml version="1.0"?><BlockList><Latest>YQ</Latest><Latest>Yg</Latest></BlockList>`), "commit attempt %d", attempt)
+		}
+
+		digest := "sha256:b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
+		status, _ = call("FinalizeArtifact", "{"+artifactRef+`,"size":"10"}`)
+		require.Equal(t, http.StatusBadRequest, status)
+		status, finalized := call("FinalizeArtifact", "{"+artifactRef+`,"size":"11","hash":"`+digest+`"}`)
+		require.Equal(t, http.StatusOK, status, finalized)
+		id := finalized["artifactId"].(string)
+		status, refinalized := call("FinalizeArtifact", "{"+artifactRef+`,"size":"10"}`)
+		require.Equal(t, http.StatusOK, status)
+		require.Equal(t, id, refinalized["artifactId"])
+		status, conflict := call("CreateArtifact", "{"+artifactRef+"}")
+		require.Equal(t, http.StatusConflict, status)
+		require.Equal(t, "already_exists", conflict["code"])
+
+		status, listed := call("ListArtifacts", `{"workflowRunBackendId":"7","idFilter":"`+id+`"}`)
+		require.Equal(t, http.StatusOK, status)
+		artifacts := listed["artifacts"].([]any)
+		require.Len(t, artifacts, 1)
+		artifact := artifacts[0].(map[string]any)
+		require.Regexp(t, `^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\dZ$`, artifact["createdAt"])
+		delete(artifact, "createdAt")
+		require.Equal(t, map[string]any{"workflowRunBackendId": "7", "name": "50% art@v1", "size": "11", "digest": digest, "databaseId": id}, artifact)
+		_, other := call("ListArtifacts", `{"workflow_run_backend_id":"8"}`)
+		require.Empty(t, other["artifacts"])
+
+		body, header := download()
+		require.Equal(t, "hello world", body)
+		require.Equal(t, "application/zip", header.Get("Content-Type"))
+		require.Equal(t, "attachment; filename*=UTF-8''50%25%20art%40v1.zip", header.Get("Content-Disposition"))
+
+		status, _ = call("DeleteArtifact", "{"+artifactRef+"}")
+		require.Equal(t, http.StatusOK, status)
+		status, missing := call("GetSignedArtifactURL", "{"+artifactRef+"}")
+		require.Equal(t, http.StatusNotFound, status)
+		require.Equal(t, "not_found", missing["code"])
+
+		status, created = call("CreateArtifact", "{"+artifactRef+"}")
+		require.Equal(t, http.StatusOK, status, created)
+		status, _ = request(t, http.MethodPut, created["signedUploadUrl"].(string), strings.NewReader("gz"), http.Header{"X-Ms-Blob-Content-Type": {"application/gzip"}})
+		require.Equal(t, http.StatusCreated, status)
+		status, _ = call("FinalizeArtifact", "{"+artifactRef+`,"size":"2"}`)
+		require.Equal(t, http.StatusOK, status)
+		body, header = download()
+		require.Equal(t, "gz", body)
+		require.Equal(t, "application/gzip", header.Get("Content-Type"))
+		require.Equal(t, "attachment; filename*=UTF-8''50%25%20art%40v1", header.Get("Content-Disposition"))
+
+		rerun := http.NewServeMux()
+		registerV4(rerun, artifactPath)
+		recorder := httptest.NewRecorder()
+		rerun.ServeHTTP(recorder, httptest.NewRequest(http.MethodPost, artifactServicePath+"/CreateArtifact", strings.NewReader("{"+artifactRef+"}")))
+		require.Equal(t, http.StatusOK, recorder.Code, recorder.Body.String())
+	})
 }
 
 func TestSafeResolve(t *testing.T) {

act/artifacts/server_v4.go

@@ -0,0 +1,329 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package artifacts
+
+import (
+	"cmp"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json/v2"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+	"sync"
+	"time"
+)
+
+type serverV4 struct { // the subset of Gitea's v4 artifact service that the toolkit uses, unauthenticated like the v3 routes beside it
+	dir     string
+	mu      sync.Mutex
+	lastID  int64
+	created map[string]bool
+}
+
+const (
+	zipMimeType   = "application/zip"
+	maxTwirpBytes = 1 << 20
+)
+
+func registerV4(router *http.ServeMux, baseDir string) {
+	server := &serverV4{dir: filepath.Join(baseDir, "v4"), lastID: time.Now().UnixMilli(), created: map[string]bool{}} // IDs stay unique across invocations sharing baseDir
+	router.HandleFunc("POST "+artifactServicePath+"/CreateArtifact", twirp(server.createArtifact))
+	router.HandleFunc("POST "+artifactServicePath+"/FinalizeArtifact", twirp(server.finalizeArtifact))
+	router.HandleFunc("POST "+artifactServicePath+"/ListArtifacts", twirp(server.listArtifacts))
+	router.HandleFunc("POST "+artifactServicePath+"/GetSignedArtifactURL", twirp(server.getSignedArtifactURL))
+	router.HandleFunc("POST "+artifactServicePath+"/DeleteArtifact", twirp(server.deleteArtifact))
+	router.HandleFunc("PUT "+artifactServicePath+"/UploadArtifact", server.uploadArtifact)
+	router.HandleFunc("GET "+artifactServicePath+"/DownloadArtifact", server.downloadArtifact)
+}
+
+type twirpError struct {
+	status int
+	code   string
+	msg    string
+}
+
+func (e *twirpError) Error() string { return e.msg }
+
+func notFound(name string) error {
+	return &twirpError{http.StatusNotFound, "not_found", fmt.Sprintf("artifact %q not found", name)}
+}
+
+func badRequest(format string, args ...any) error {
+	return &twirpError{http.StatusBadRequest, "invalid_argument", fmt.Sprintf(format, args...)}
+}
+
+func twirp[Req, Resp any](handle func(*http.Request, Req) (Resp, error)) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var req Req
+		var resp Resp
+		err := json.UnmarshalRead(io.LimitReader(r.Body, maxTwirpBytes), &req, json.MatchCaseInsensitiveNames(true)) // also matches the toolkit's proto field names
+		if err != nil {
+			err = badRequest("malformed request: %v", err)
+		} else {
+			resp, err = handle(r, req)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		if err != nil {
+			terr := &twirpError{http.StatusInternalServerError, "internal", err.Error()}
+			errors.As(err, &terr)
+			w.WriteHeader(terr.status)
+			_ = json.MarshalWrite(w, map[string]string{"code": terr.code, "msg": terr.msg})
+			return
+		}
+		_ = json.MarshalWrite(w, resp)
+	}
+}
+
+func fileName(name string) string { // safe on any filesystem for any client-chosen name, case-insensitive ones included
+	sum := sha256.Sum256([]byte(name))
+	return hex.EncodeToString(sum[:])
+}
+
+func (s *serverV4) runDir(runID string) string {
+	return filepath.Join(s.dir, fileName(runID))
+}
+
+func (s *serverV4) artifactDir(runID, name string) string {
+	return filepath.Join(s.runDir(runID), fileName(name))
+}
+
+func (s *serverV4) urlDir(r *http.Request) string {
+	return s.artifactDir(r.URL.Query().Get("run"), r.URL.Query().Get("name"))
+}
+
+func readMeta(dir string) (*monolithArtifact, error) {
+	data, err := os.ReadFile(filepath.Join(dir, "meta.json"))
+	if err != nil {
+		return nil, err
+	}
+	var meta monolithArtifact
+	return &meta, json.Unmarshal(data, &meta)
+}
+
+func writeMeta(dir string, meta *monolithArtifact) error {
+	data, err := json.Marshal(meta)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(filepath.Join(dir, "meta.json"), data, 0o644)
+}
+
+func blobURL(r *http.Request, endpoint, runID, name string) string {
+	return "http://" + r.Host + artifactServicePath + "/" + endpoint + "?" + url.Values{"run": {runID}, "name": {name}}.Encode()
+}
+
+func (s *serverV4) createArtifact(r *http.Request, req createArtifactRequest) (createArtifactResponse, error) { // an exec invocation re-runs its workflows, so it replaces earlier invocations' artifacts but conflicts with its own
+	dir := s.artifactDir(req.WorkflowRunBackendID, req.Name)
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.created[dir] {
+		return createArtifactResponse{}, &twirpError{http.StatusConflict, "already_exists", "an artifact with this name already exists on the workflow run"}
+	}
+	if err := os.RemoveAll(dir); err != nil {
+		return createArtifactResponse{}, err
+	}
+	if err := os.MkdirAll(filepath.Join(dir, "blocks"), 0o755); err != nil {
+		return createArtifactResponse{}, err
+	}
+	s.lastID++
+	if err := writeMeta(dir, &monolithArtifact{
+		WorkflowRunBackendID: req.WorkflowRunBackendID,
+		DatabaseID:           s.lastID,
+		Name:                 req.Name,
+		CreatedAt:            time.Now().UTC().Truncate(time.Second),
+	}); err != nil {
+		return createArtifactResponse{}, err
+	}
+	s.created[dir] = true
+	return createArtifactResponse{Ok: true, SignedUploadURL: blobURL(r, "UploadArtifact", req.WorkflowRunBackendID, req.Name)}, nil
+}
+
+type blockList struct {
+	Blocks []string `xml:",any"` // Latest, Committed and Uncommitted all name a staged block
+}
+
+func (s *serverV4) uploadArtifact(w http.ResponseWriter, r *http.Request) {
+	dir := s.urlDir(r)
+	if meta, err := readMeta(dir); err != nil || meta.Digest != "" {
+		http.Error(w, "no artifact awaits an upload", http.StatusNotFound)
+		return
+	}
+	contentType := r.Header.Get("x-ms-blob-content-type")
+	var err error
+	switch comp := r.URL.Query().Get("comp"); comp {
+	case "block":
+		err = writeFile(filepath.Join(dir, "blocks", fileName(r.URL.Query().Get("blockid"))), r.Body)
+	case "blocklist":
+		err = commitBlob(dir, contentType, func(out io.Writer) error { return joinBlocks(out, dir, r.Body) })
+	case "": // Put Blob, which docker/build-push-action uses
+		err = commitBlob(dir, contentType, func(out io.Writer) error {
+			_, err := io.Copy(out, r.Body)
+			return err
+		})
+	default:
+		http.Error(w, "unsupported comp "+comp, http.StatusBadRequest)
+		return
+	}
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.WriteHeader(http.StatusCreated)
+}
+
+func writeFile(name string, body io.Reader) error {
+	file, err := os.Create(name)
+	if err != nil {
+		return err
+	}
+	_, err = io.Copy(file, body)
+	return errors.Join(err, file.Close())
+}
+
+func commitBlob(dir, contentType string, write func(io.Writer) error) error { // replaces the blob whole and keeps its content type, as Azure does
+	out, err := os.CreateTemp(dir, "blob")
+	if err != nil {
+		return err
+	}
+	if err = errors.Join(write(out), out.Close()); err == nil {
+		err = os.Rename(out.Name(), filepath.Join(dir, "blob"))
+	}
+	if err != nil {
+		return errors.Join(err, os.Remove(out.Name()))
+	}
+	return os.WriteFile(filepath.Join(dir, "content-type"), []byte(contentType), 0o644)
+}
+
+func joinBlocks(out io.Writer, dir string, body io.Reader) error { // keeps the blocks for finalizeArtifact, so that a retried commit can join them again
+	var list blockList
+	if err := xml.NewDecoder(io.LimitReader(body, maxTwirpBytes)).Decode(&list); err != nil {
+		return err
+	}
+	for _, id := range list.Blocks {
+		if err := appendBlock(out, filepath.Join(dir, "blocks", fileName(id))); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func appendBlock(out io.Writer, name string) error {
+	in, err := os.Open(name)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+	_, err = io.Copy(out, in)
+	return err
+}
+
+func (s *serverV4) finalizeArtifact(_ *http.Request, req finalizeArtifactRequest) (finalizeArtifactResponse, error) {
+	dir := s.artifactDir(req.WorkflowRunBackendID, req.Name)
+	meta, err := readMeta(dir)
+	if err != nil {
+		return finalizeArtifactResponse{}, notFound(req.Name)
+	} else if meta.Digest != "" {
+		return finalizeArtifactResponse{Ok: true, ArtifactID: meta.DatabaseID}, nil
+	}
+	blob, err := os.Open(filepath.Join(dir, "blob"))
+	if err != nil {
+		return finalizeArtifactResponse{}, badRequest("artifact %q has no upload", req.Name)
+	}
+	defer blob.Close()
+	hash := sha256.New()
+	size, err := io.Copy(hash, blob)
+	if err != nil {
+		return finalizeArtifactResponse{}, err
+	}
+	digest := "sha256:" + hex.EncodeToString(hash.Sum(nil))
+	if size != req.Size {
+		return finalizeArtifactResponse{}, badRequest("size %d does not match the %d bytes uploaded", req.Size, size)
+	}
+	if req.Hash != "" && req.Hash != digest {
+		return finalizeArtifactResponse{}, badRequest("hash %s does not match the uploaded %s", req.Hash, digest)
+	}
+	s.mu.Lock() // only after hashing, so finalizing one large artifact does not stall the others
+	defer s.mu.Unlock()
+	if current, err := readMeta(dir); err != nil || current.DatabaseID != meta.DatabaseID {
+		return finalizeArtifactResponse{}, notFound(req.Name)
+	}
+	meta.Size, meta.Digest = size, digest
+	if err := writeMeta(dir, meta); err != nil {
+		return finalizeArtifactResponse{}, err
+	}
+	return finalizeArtifactResponse{Ok: true, ArtifactID: meta.DatabaseID}, os.RemoveAll(filepath.Join(dir, "blocks"))
+}
+
+func (s *serverV4) listArtifacts(_ *http.Request, req listArtifactsRequest) (listArtifactsResponse, error) {
+	run := s.runDir(req.WorkflowRunBackendID)
+	entries, err := os.ReadDir(run)
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return listArtifactsResponse{}, err
+	}
+	var resp listArtifactsResponse
+	for _, entry := range entries {
+		meta, err := readMeta(filepath.Join(run, entry.Name()))
+		if err != nil || meta.Digest == "" ||
+			req.NameFilter != "" && req.NameFilter != meta.Name || req.IDFilter != 0 && req.IDFilter != meta.DatabaseID {
+			continue
+		}
+		resp.Artifacts = append(resp.Artifacts, *meta)
+	}
+	slices.SortFunc(resp.Artifacts, func(left, right monolithArtifact) int { return cmp.Compare(left.DatabaseID, right.DatabaseID) })
+	return resp, nil
+}
+
+func (s *serverV4) getSignedArtifactURL(r *http.Request, req getSignedArtifactURLRequest) (getSignedArtifactURLResponse, error) {
+	if meta, err := readMeta(s.artifactDir(req.WorkflowRunBackendID, req.Name)); err != nil || meta.Digest == "" {
+		return getSignedArtifactURLResponse{}, notFound(req.Name)
+	}
+	return getSignedArtifactURLResponse{SignedURL: blobURL(r, "DownloadArtifact", req.WorkflowRunBackendID, req.Name)}, nil
+}
+
+func (s *serverV4) downloadArtifact(w http.ResponseWriter, r *http.Request) {
+	dir := s.urlDir(r)
+	meta, err := readMeta(dir)
+	if err != nil || meta.Digest == "" {
+		http.Error(w, "artifact not found", http.StatusNotFound)
+		return
+	}
+	blob, err := os.Open(filepath.Join(dir, "blob"))
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	defer blob.Close()
+	data, _ := os.ReadFile(filepath.Join(dir, "content-type"))
+	contentType, filename := string(data), meta.Name
+	if !strings.Contains(contentType, "/") {
+		contentType = zipMimeType
+	}
+	if contentType == zipMimeType && !strings.HasSuffix(filename, ".zip") {
+		filename += ".zip"
+	}
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("Content-Disposition", "attachment; filename*=UTF-8''"+strings.ReplaceAll(url.QueryEscape(filename), "+", "%20")) // RFC 5987 attr-chars only, which the toolkit and mime.ParseMediaType both accept
+	http.ServeContent(w, r, "", meta.CreatedAt, blob)
+}
+
+func (s *serverV4) deleteArtifact(_ *http.Request, req deleteArtifactRequest) (deleteArtifactResponse, error) {
+	dir := s.artifactDir(req.WorkflowRunBackendID, req.Name)
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	meta, err := readMeta(dir)
+	if err != nil {
+		return deleteArtifactResponse{}, notFound(req.Name)
+	}
+	delete(s.created, dir)
+	return deleteArtifactResponse{Ok: true, ArtifactID: meta.DatabaseID}, os.RemoveAll(dir)
+}

act/artifacts/token.go

@@ -0,0 +1,23 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package artifacts
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json/v2"
+	"time"
+)
+
+func LocalRuntimeToken(run string, lifetime time.Duration) string { // an unsecured JWT with the claims the toolkit and buildx read, its run hashed for scp and its jti an unguessable bearer
+	now := time.Now()
+	claims, _ := json.Marshal(map[string]any{
+		"scp": "Actions.Results:" + fileName(run) + ":1",
+		"ac":  `[{"Scope":"","Permission":3}]`,
+		"nbf": now.Unix(),
+		"exp": now.Add(lifetime).Unix(),
+		"jti": rand.Text(),
+	})
+	return base64.RawURLEncoding.EncodeToString([]byte(`{"alg":"none","typ":"JWT"}`)) + "." + base64.RawURLEncoding.EncodeToString(claims) + "."
+}

act/artifacts/twirp.go

@@ -0,0 +1,55 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package artifacts
+
+import "time"
+
+const artifactServicePath = "/twirp/github.actions.results.api.v1.ArtifactService"
+
+type ( // the ArtifactService messages in the protobuf JSON mapping, which writes int64 as strings
+	createArtifactResponse struct {
+		Ok              bool   `json:"ok"`
+		SignedUploadURL string `json:"signedUploadUrl"`
+	}
+
+	finalizeArtifactRequest struct {
+		WorkflowRunBackendID string
+		Name                 string
+		Size                 int64 `json:",string"`
+		Hash                 string
+	}
+	finalizeArtifactResponse struct {
+		Ok         bool  `json:"ok"`
+		ArtifactID int64 `json:"artifactId,string"`
+	}
+
+	listArtifactsRequest struct {
+		WorkflowRunBackendID string
+		NameFilter           string
+		IDFilter             int64 `json:",string"`
+	}
+	listArtifactsResponse struct {
+		Artifacts []monolithArtifact `json:"artifacts"`
+	}
+	monolithArtifact struct {
+		WorkflowRunBackendID string    `json:"workflowRunBackendId"` // the toolkit sends it back to GetSignedArtifactURL
+		DatabaseID           int64     `json:"databaseId,string"`
+		Name                 string    `json:"name"`
+		Size                 int64     `json:"size,string"`
+		CreatedAt            time.Time `json:"createdAt"` // whole seconds, the toolkit rejects the trimmed fractions json writes
+		Digest               string    `json:"digest"`    // empty until the upload is finalized
+	}
+
+	getSignedArtifactURLRequest struct {
+		WorkflowRunBackendID string
+		Name                 string
+	}
+	getSignedArtifactURLResponse struct {
+		SignedURL string `json:"signedUrl"`
+	}
+
+	createArtifactRequest  = getSignedArtifactURLRequest
+	deleteArtifactRequest  = getSignedArtifactURLRequest
+	deleteArtifactResponse = finalizeArtifactResponse
+)

act/container/docker_proxy.go

@@ -40,7 +40,9 @@ const (
 	jobLabel      = "com.gitea.runner.job."
 	maxCreateBody = 8 << 20
 
-	dockerProxyProbeTimeout = 5 * time.Second
+	dockerProxyProbeTimeout       = 5 * time.Second
+	dockerProxyProbeWorkerTimeout = time.Minute
+	dockerProxyProbeTarget        = "/gitea-runner-probe"
 )
 
 var (
@@ -48,7 +50,7 @@ var (
 	rawStreamPath = regexp.MustCompile(`^(/v[0-9.]+)?/(containers/[^/]+/attach|exec/[^/]+/start)$`)
 )
 
-var dockerProxyDirectories, dockerProxyProbes sync.Map
+var dockerProxyProbes sync.Map
 
 type dockerProxyDirectory struct {
 	dir, daemonDir string
@@ -68,7 +70,7 @@ func NewDockerProxy(ctx context.Context, job string) *DockerProxy {
 	}
 	probeCtx, cancel := context.WithTimeout(ctx, dockerProxyProbeTimeout)
 	defer cancel()
-	cli, err := GetDockerClient(probeCtx)
+	cli, err := client.New(client.FromEnv) // negotiates on first request, so a cached probe costs no round trip
 	if err != nil {
 		return nil
 	}
@@ -83,65 +85,69 @@ func NewDockerProxy(ctx context.Context, job string) *DockerProxy {
 	}
 	workdir, _ := os.Getwd()
 	key := [3]string{cli.DaemonHost(), workdir, os.TempDir()}
-	cached, _ := dockerProxyDirectories.Load(key)
-	directory, seen := cached.(dockerProxyDirectory)
-	seen = seen && os.SameFile(directory.socket, socket) // daemon replacement invalidates cached paths
-	if !seen {
-		directory, seen, err = probeDockerProxyDirectory(probeCtx, cli, key, socket)
-	}
+	probe, err := probeDockerProxyDirectory(probeCtx, cli, key, socket)
 	if err != nil {
 		common.Logger(ctx).Infof("docker proxy probe failed, jobs get the daemon socket directly: %v", err)
 		return nil
 	}
-	if !seen {
+	if !probe.seen {
 		common.Logger(ctx).Infof("the docker daemon cannot reach the runner's temporary or working directory, jobs get the daemon socket directly")
 		return nil
 	}
 	if ctx.Err() != nil {
 		return nil
 	}
-	proxy, err := StartDockerProxy(daemonSocket, directory.dir, job)
+	proxy, err := StartDockerProxy(daemonSocket, probe.directory.dir, job)
 	if err != nil {
-		dockerProxyDirectories.Delete(key)
+		dockerProxyProbes.CompareAndDelete(key, probe)
 		common.Logger(ctx).Warnf("docker proxy not started, the job gets the daemon socket directly: %v", err)
 		return nil
 	}
-	dockerProxyDirectories.Store(key, directory)
-	proxy.Socket = directory.daemonDir + strings.TrimPrefix(proxy.Socket, directory.dir)
+	proxy.Socket = probe.directory.daemonDir + strings.TrimPrefix(proxy.Socket, probe.directory.dir)
 	return proxy
 }
 
-func probeDockerProxyDirectory(ctx context.Context, cli client.APIClient, key [3]string, socket os.FileInfo) (dockerProxyDirectory, bool, error) {
+func probeDockerProxyDirectory(ctx context.Context, cli client.APIClient, key [3]string, socket os.FileInfo) (*dockerProxyProbe, error) {
 	for {
 		probe := &dockerProxyProbe{directory: dockerProxyDirectory{socket: socket}, done: make(chan struct{})}
 		actual, loaded := dockerProxyProbes.LoadOrStore(key, probe)
 		if loaded {
 			probe, _ = actual.(*dockerProxyProbe)
-			if !os.SameFile(probe.directory.socket, socket) {
+			if !os.SameFile(probe.directory.socket, socket) { // daemon replacement invalidates cached paths
 				dockerProxyProbes.CompareAndDelete(key, probe)
 				continue
 			}
-			select {
-			case <-ctx.Done():
-				return dockerProxyDirectory{}, false, ctx.Err()
-			case <-probe.done:
-			}
-			if ctx.Err() == nil && (errors.Is(probe.err, context.Canceled) || errors.Is(probe.err, context.DeadlineExceeded)) {
-				continue
-			}
 		} else {
-			probe.directory.dir, probe.directory.daemonDir = runnerContainerWorkdir(ctx, cli)
-			probe.seen = probe.directory.daemonDir != ""
-			if !probe.seen {
-				if probe.directory.dir, probe.err = filepath.Abs(key[2]); probe.err == nil {
-					probe.directory.daemonDir = probe.directory.dir
-					probe.seen, probe.err = daemonSeesDir(ctx, cli, probe.directory.dir, probe.directory.daemonDir)
+			go func() { // outlives callers' deadlines so a slow daemon still gets its result cached
+				defer cli.Close()
+				ctx, cancel := context.WithTimeout(context.Background(), dockerProxyProbeWorkerTimeout)
+				defer cancel()
+				probe.directory.dir, probe.directory.daemonDir = runnerContainerWorkdir(ctx, cli)
+				probe.seen = probe.directory.daemonDir != ""
+				if !probe.seen {
+					if probe.directory.dir, probe.err = filepath.Abs(key[2]); probe.err == nil {
+						probe.directory.daemonDir = probe.directory.dir
+						probe.seen, probe.err = daemonSeesDir(ctx, cli, probe.directory.dir, probe.directory.daemonDir)
+					}
 				}
-			}
-			dockerProxyProbes.CompareAndDelete(key, probe)
-			close(probe.done)
+				if probe.seen {
+					dockerProxyProbes.LoadOrStore(key, probe)
+				} else {
+					dockerProxyProbes.CompareAndDelete(key, probe)
+				}
+				close(probe.done)
+				removeStaleProbeContainers(cli)
+			}()
 		}
-		return probe.directory, probe.seen, probe.err
+		select {
+		case <-ctx.Done():
+			return &dockerProxyProbe{}, ctx.Err()
+		case <-probe.done:
+		}
+		if ctx.Err() == nil && errors.Is(probe.err, context.DeadlineExceeded) {
+			continue
+		}
+		return probe, probe.err
 	}
 }
 
@@ -200,7 +206,7 @@ func daemonSeesDir(ctx context.Context, cli client.APIClient, dir, daemonDir str
 		created, err = cli.ContainerCreate(ctx, client.ContainerCreateOptions{
 			Config: &container.Config{Image: image.ID, Cmd: []string{"true"}},
 			HostConfig: &container.HostConfig{Mounts: []mount.Mount{
-				{Type: mount.TypeBind, Source: daemonDir, Target: "/gitea-runner-probe", ReadOnly: true}, // not the marker itself, podman creates a missing bind source where docker rejects it
+				{Type: mount.TypeBind, Source: daemonDir, Target: dockerProxyProbeTarget, ReadOnly: true}, // not the marker itself, podman creates a missing bind source where docker rejects it
 			}},
 		})
 		if !cerrdefs.IsNotFound(err) {
@@ -213,7 +219,7 @@ func daemonSeesDir(ctx context.Context, cli client.APIClient, dir, daemonDir str
 	if err != nil {
 		return false, err
 	}
-	seen, err := containerSeesMarker(ctx, cli, dir, created.ID, "/gitea-runner-probe")
+	seen, err := containerSeesMarker(ctx, cli, dir, created.ID, dockerProxyProbeTarget)
 	cleanupCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), dockerProxyProbeTimeout)
 	defer cancel()
 	if _, removeErr := cli.ContainerRemove(cleanupCtx, created.ID, client.ContainerRemoveOptions{Force: true, RemoveVolumes: true}); removeErr != nil {
@@ -222,6 +228,36 @@ func daemonSeesDir(ctx context.Context, cli client.APIClient, dir, daemonDir str
 	return seen, err
 }
 
+// removeStaleProbeContainers removes probe containers left by abandoned creates once any probe in flight when listed has ended.
+func removeStaleProbeContainers(cli client.APIClient) {
+	ctx, cancel := context.WithTimeout(context.Background(), dockerProxyProbeTimeout)
+	defer cancel()
+	listed, err := cli.ContainerList(ctx, client.ContainerListOptions{
+		All:     true,
+		Filters: make(client.Filters).Add("status", string(container.StateCreated)).Add("volume", dockerProxyProbeTarget),
+	})
+	if err != nil {
+		common.Logger(ctx).Warnf("listing stale docker proxy probe containers failed: %v", err)
+		return
+	}
+	listed.Items = slices.DeleteFunc(listed.Items, func(stale container.Summary) bool {
+		return stale.State != container.StateCreated || !slices.ContainsFunc(stale.Mounts, func(mountPoint container.MountPoint) bool {
+			return mountPoint.Type == mount.TypeBind && !mountPoint.RW && mountPoint.Destination == dockerProxyProbeTarget
+		})
+	})
+	if len(listed.Items) == 0 {
+		return
+	}
+	time.Sleep(dockerProxyProbeWorkerTimeout + dockerProxyProbeTimeout)
+	for _, stale := range listed.Items {
+		ctx, cancel := context.WithTimeout(context.Background(), dockerProxyProbeTimeout)
+		if err := (&containerReference{cli: cli, id: stale.ID}).remove()(ctx); err != nil {
+			common.Logger(ctx).Warnf("removing stale docker proxy probe container failed: %v", err)
+		}
+		cancel()
+	}
+}
+
 // StartDockerProxy serves a job's docker socket in dir, labelling what the job creates through it.
 func StartDockerProxy(daemonSocket, dir, job string) (*DockerProxy, error) {
 	info, err := os.Stat(daemonSocket)

act/container/docker_proxy_test.go

@@ -94,6 +94,8 @@ func TestDockerProxy(t *testing.T) {
 				return
 			}
 			_, _ = w.Write([]byte(`[{"Id":"probe-image"}]`))
+		case strings.HasSuffix(r.URL.Path, "/containers/json"):
+			_, _ = w.Write([]byte(`[]`))
 		case strings.HasSuffix(r.URL.Path, "/json"):
 			http.NotFound(w, r)
 		case strings.HasSuffix(r.URL.Path, "/archive"):
@@ -235,7 +237,8 @@ func TestDockerProxy(t *testing.T) {
 			t.Skip("automatic proxy discovery requires Linux")
 		}
 		t.Setenv("DOCKER_HOST", "unix://"+daemonSocket)
-		t.Setenv("TMPDIR", shortTempDir(t))
+		tempDir := shortTempDir(t)
+		t.Setenv("TMPDIR", tempDir)
 		require.Nil(t, NewDockerProxy(t.Context(), "failed"))
 		for _, job := range []string{"first", "second"} {
 			proxy := NewDockerProxy(t.Context(), job)
@@ -243,12 +246,10 @@ func TestDockerProxy(t *testing.T) {
 			require.NoError(t, proxy.Close(context.Background()))
 		}
 		assert.EqualValues(t, 2, probes.Load())
-		dockerProxyDirectories.Range(func(key, value any) bool {
-			directory, _ := value.(dockerProxyDirectory)
-			directory.socket, _ = os.Stat(t.TempDir())
-			dockerProxyDirectories.Store(key, directory)
-			return true
-		})
+		workdir, err := os.Getwd()
+		require.NoError(t, err)
+		cached, _ := dockerProxyProbes.Load([3]string{"unix://" + daemonSocket, workdir, tempDir})
+		cached.(*dockerProxyProbe).directory.socket, _ = os.Stat(t.TempDir())
 		proxy := NewDockerProxy(t.Context(), "replaced daemon")
 		require.NotNil(t, proxy)
 		require.NoError(t, proxy.Close(context.Background()))
@@ -476,10 +477,23 @@ func BenchmarkDockerProxy(b *testing.B) {
 
 type probeClient struct {
 	mobyclient.APIClient
-	create func(mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error)
-	remove func(context.Context, string, mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error)
-	stat   func(string) error
-	mounts []container.MountPoint
+	create     func(context.Context, mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error)
+	remove     func(context.Context, string, mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error)
+	stat       func(string) error
+	mounts     []container.MountPoint
+	containers []container.Summary
+}
+
+func (c *probeClient) Close() error {
+	return nil
+}
+
+func (c *probeClient) ContainerList(context.Context, mobyclient.ContainerListOptions) (mobyclient.ContainerListResult, error) {
+	return mobyclient.ContainerListResult{Items: c.containers}, nil
+}
+
+func (c *probeClient) ContainerKill(context.Context, string, mobyclient.ContainerKillOptions) (mobyclient.ContainerKillResult, error) {
+	return mobyclient.ContainerKillResult{}, cerrdefs.ErrConflict
 }
 
 func (c *probeClient) ContainerInspect(context.Context, string, mobyclient.ContainerInspectOptions) (mobyclient.ContainerInspectResult, error) {
@@ -490,8 +504,8 @@ func (c *probeClient) ImageList(context.Context, mobyclient.ImageListOptions) (m
 	return mobyclient.ImageListResult{Items: []image.Summary{{ID: "removed-image"}, {ID: "probe-image"}}}, nil
 }
 
-func (c *probeClient) ContainerCreate(_ context.Context, opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
-	return c.create(opts)
+func (c *probeClient) ContainerCreate(ctx context.Context, opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+	return c.create(ctx, opts)
 }
 
 func (c *probeClient) ContainerRemove(ctx context.Context, id string, opts mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error) {
@@ -518,7 +532,7 @@ func TestDockerProxyDirectoryProbes(t *testing.T) {
 				var calls, removals atomic.Int32
 				visible := false
 				cli := &probeClient{
-					create: func(_opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+					create: func(_ctx context.Context, _opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
 						calls.Add(1)
 						<-release
 						return mobyclient.ContainerCreateResult{ID: "probe"}, createErr
@@ -538,23 +552,18 @@ func TestDockerProxyDirectoryProbes(t *testing.T) {
 				results := make(chan result, 8)
 				for range cap(results) {
 					go func() {
-						_, seen, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
-						results <- result{seen, err}
+						probe, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
+						results <- result{probe.seen, err}
 					}()
 				}
 				synctest.Wait()
 				assert.EqualValues(t, 1, calls.Load())
-				ctx, cancel := context.WithCancel(t.Context())
-				cancel()
-				_, seen, err := probeDockerProxyDirectory(ctx, cli, key, socket)
-				require.ErrorIs(t, err, context.Canceled)
-				assert.False(t, seen)
 				replacement, err := os.Stat(t.TempDir())
 				require.NoError(t, err)
 				replaced := make(chan result, 1)
 				go func() {
-					_, seen, err := probeDockerProxyDirectory(t.Context(), cli, key, replacement)
-					replaced <- result{seen, err}
+					probe, err := probeDockerProxyDirectory(t.Context(), cli, key, replacement)
+					replaced <- result{probe.seen, err}
 				}()
 				synctest.Wait()
 				assert.EqualValues(t, 2, calls.Load())
@@ -574,11 +583,11 @@ func TestDockerProxyDirectoryProbes(t *testing.T) {
 					assert.Zero(t, removals.Load())
 				}
 				createErr, visible = nil, true
-				directory, seen, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
+				probe, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
 				require.NoError(t, err)
-				assert.True(t, seen)
-				assert.Equal(t, dir, directory.dir)
-				assert.Equal(t, dir, directory.daemonDir)
+				assert.True(t, probe.seen)
+				assert.Equal(t, dir, probe.directory.dir)
+				assert.Equal(t, dir, probe.directory.daemonDir)
 				assert.EqualValues(t, 3, calls.Load())
 				entries, err := os.ReadDir(dir)
 				require.NoError(t, err)
@@ -586,7 +595,7 @@ func TestDockerProxyDirectoryProbes(t *testing.T) {
 			})
 		})
 	}
-	t.Run("cancelled probe does not cancel another caller", func(t *testing.T) {
+	t.Run("cancelled caller leaves the probe to finish for the others", func(t *testing.T) {
 		synctest.Test(t, func(t *testing.T) {
 			dir := t.TempDir()
 			socket, err := os.Stat(t.TempDir())
@@ -595,49 +604,105 @@ func TestDockerProxyDirectoryProbes(t *testing.T) {
 			ctx, cancel := context.WithCancel(t.Context())
 			defer cancel()
 			release := make(chan struct{})
-			calls := 0
+			var calls, removals atomic.Int32
 			cli := &probeClient{
-				create: func(_opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
-					calls++
-					if calls == 1 {
-						<-release
+				create: func(ctx context.Context, _opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+					calls.Add(1)
+					<-release
+					return mobyclient.ContainerCreateResult{ID: "probe"}, ctx.Err()
+				},
+				stat: func(_path string) error { return nil },
+				remove: func(_ctx context.Context, _id string, _opts mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error) {
+					removals.Add(1)
+					return mobyclient.ContainerRemoveResult{}, nil
+				},
+			}
+			leader, follower, late := make(chan result, 1), make(chan result, 1), make(chan result, 1)
+			go func() {
+				probe, err := probeDockerProxyDirectory(ctx, cli, key, socket)
+				leader <- result{probe.seen, err}
+			}()
+			synctest.Wait()
+			go func() {
+				probe, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
+				follower <- result{probe.seen, err}
+			}()
+			synctest.Wait()
+			cancel()
+			leaderResult := <-leader
+			require.ErrorIs(t, leaderResult.err, context.Canceled)
+			assert.False(t, leaderResult.seen)
+			go func() {
+				probe, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
+				late <- result{probe.seen, err}
+			}()
+			synctest.Wait()
+			close(release)
+			for _, results := range []chan result{follower, late} {
+				result := <-results
+				require.NoError(t, result.err)
+				assert.True(t, result.seen)
+			}
+			assert.EqualValues(t, 1, calls.Load())
+			assert.EqualValues(t, 1, removals.Load())
+			_, cached := dockerProxyProbes.Load(key)
+			assert.True(t, cached)
+		})
+	})
+	t.Run("caller joining a probe that ran out of time retries", func(t *testing.T) {
+		synctest.Test(t, func(t *testing.T) {
+			dir := t.TempDir()
+			socket, err := os.Stat(t.TempDir())
+			require.NoError(t, err)
+			var calls atomic.Int32
+			cli := &probeClient{
+				create: func(ctx context.Context, _opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+					if calls.Add(1) == 1 {
+						<-ctx.Done()
 						return mobyclient.ContainerCreateResult{}, ctx.Err()
-					} else {
-						return mobyclient.ContainerCreateResult{ID: "probe"}, nil
 					}
+					return mobyclient.ContainerCreateResult{ID: "probe"}, nil
 				},
 				stat: func(_path string) error { return nil },
 				remove: func(_ctx context.Context, _id string, _opts mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error) {
 					return mobyclient.ContainerRemoveResult{}, nil
 				},
 			}
-			leader, follower := make(chan result, 1), make(chan result, 1)
-			go func() {
-				_, seen, err := probeDockerProxyDirectory(ctx, cli, key, socket)
-				leader <- result{seen, err}
-			}()
-			synctest.Wait()
-			go func() {
-				_, seen, err := probeDockerProxyDirectory(t.Context(), cli, key, socket)
-				follower <- result{seen, err}
-			}()
-			synctest.Wait()
-			assert.Equal(t, 1, calls)
-			cancel()
-			close(release)
-			leaderResult, followerResult := <-leader, <-follower
-			require.ErrorIs(t, leaderResult.err, context.Canceled)
-			assert.False(t, leaderResult.seen)
-			require.NoError(t, followerResult.err)
-			assert.True(t, followerResult.seen)
-			assert.Equal(t, 2, calls)
+			probe, err := probeDockerProxyDirectory(t.Context(), cli, [3]string{"daemon", dir, dir}, socket)
+			require.NoError(t, err)
+			assert.True(t, probe.seen)
+			assert.EqualValues(t, 2, calls.Load())
 		})
 	})
 }
 
+func TestRemoveStaleProbeContainers(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		probeMount := container.MountPoint{Type: mount.TypeBind, Destination: "/gitea-runner-probe"}
+		writableMount := container.MountPoint{Type: mount.TypeBind, Destination: "/gitea-runner-probe", RW: true}
+		var removed []string
+		cli := &probeClient{
+			containers: []container.Summary{
+				{ID: "abandoned", State: container.StateCreated, Mounts: []container.MountPoint{probeMount}},
+				{ID: "foreign", State: container.StateCreated, Mounts: []container.MountPoint{writableMount}},
+				{ID: "started", State: container.StateExited, Mounts: []container.MountPoint{probeMount}},
+			},
+			remove: func(_ctx context.Context, id string, _opts mobyclient.ContainerRemoveOptions) (mobyclient.ContainerRemoveResult, error) {
+				removed = append(removed, id)
+				return mobyclient.ContainerRemoveResult{}, nil
+			},
+		}
+		start := time.Now()
+		removeStaleProbeContainers(cli)
+		assert.Equal(t, []string{"abandoned"}, removed)
+		assert.GreaterOrEqual(t, time.Since(start), dockerProxyProbeWorkerTimeout+dockerProxyProbeTimeout)
+	})
+}
+
 func TestDaemonSeesDir(t *testing.T) {
 	dir := t.TempDir()
 	markers := make(map[string]bool)
+
 	for _, testCase := range []struct {
 		name      string
 		daemonDir string
@@ -656,7 +721,7 @@ func TestDaemonSeesDir(t *testing.T) {
 			removed := false
 			var attemptedImages []string
 			cli := &probeClient{
-				create: func(opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+				create: func(_ctx context.Context, opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
 					assert.Equal(t, []mount.Mount{{Type: mount.TypeBind, Source: testCase.daemonDir, Target: "/gitea-runner-probe", ReadOnly: true}}, opts.HostConfig.Mounts)
 					attemptedImages = append(attemptedImages, opts.Config.Image)
 					if opts.Config.Image == "removed-image" {
@@ -692,6 +757,7 @@ func TestDaemonSeesDir(t *testing.T) {
 			assert.Equal(t, []string{"removed-image", "probe-image"}, attemptedImages)
 			assert.Equal(t, testCase.seen, seen)
 			assert.Equal(t, testCase.removed, removed)
+
 			entries, err := os.ReadDir(dir)
 			require.NoError(t, err)
 			assert.Empty(t, entries)

act/container/docker_run_test.go

@@ -980,7 +980,7 @@ func TestDockerCreateKeepsInputEntrypoint(t *testing.T) {
 					RunnerOptions:   "--entrypoint=runner-entrypoint",
 					WorkflowOptions: "--entrypoint=" + optionEntrypoint + " --init",
 				},
-				cli: &probeClient{create: func(opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
+				cli: &probeClient{create: func(_ctx context.Context, opts mobyclient.ContainerCreateOptions) (mobyclient.ContainerCreateResult, error) {
 					if len(entrypoint) > 0 {
 						assert.Equal(t, entrypoint, opts.Config.Entrypoint)
 					} else {

act/container/kubernetes.go

@@ -7,12 +7,15 @@ import (
 	"bufio"
 	"bytes"
 	"cmp"
+	"compress/gzip"
 	"context"
 	"crypto/rand"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"maps"
+	"net"
 	"net/http"
 	"net/url"
 	"os"
@@ -23,6 +26,7 @@ import (
 	"time"
 
 	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/common/logging"
 
 	"github.com/kballard/go-shellquote"
 	"github.com/spf13/pflag"
@@ -36,6 +40,7 @@ type KubernetesOptions struct {
 	MaxLifetime  time.Duration
 	ForcePull    bool
 	RunnerUUID   string
+	Transfer     *KubernetesTransfer
 }
 
 // KubernetesPod runs a job container and its service containers as one pod.
@@ -46,6 +51,10 @@ type KubernetesPod struct {
 	job              *kubernetesContainer
 	services         []*kubernetesContainer
 	arch, path       string
+	ips              []net.IP
+	transfer         *transferServer
+	transferImage    string
+	transferHelper   string // empty when copies go through the API server
 }
 
 type kubernetesContainer struct {
@@ -55,6 +64,7 @@ type kubernetesContainer struct {
 	name  string
 	input *NewContainerInput
 	probe map[string]any
+	gzip  bool // the container can gunzip, so copies into it go compressed
 }
 
 type containerStatus struct {
@@ -74,6 +84,7 @@ type podStatus struct {
 	Spec   struct{ Containers []struct{} }
 	Status struct {
 		Phase, Reason, Message                   string
+		PodIPs                                   []struct{ IP string }
 		Conditions                               []struct{ Type, Status, Message string }
 		InitContainerStatuses, ContainerStatuses []containerStatus
 	}
@@ -129,14 +140,24 @@ func (p *KubernetesPod) create(ctx context.Context) error {
 		labels[runnerUUIDLabel] = p.options.RunnerUUID
 	}
 	metadata := map[string]any{"name": name, "labels": labels}
+	var runnerImage string
 	if hostname, err := os.Hostname(); p.client.inCluster && err == nil {
-		var runner struct{ Metadata struct{ Name, UID string } }
+		var runner struct {
+			Metadata struct{ Name, UID string }
+			Spec     struct{ Containers []struct{ Image string } }
+		}
 		if err := p.client.do(ctx, http.MethodGet, p.client.path("pods/"+hostname), nil, &runner); err == nil {
 			metadata["ownerReferences"] = []any{map[string]any{"apiVersion": "v1", "kind": "Pod", "name": runner.Metadata.Name, "uid": runner.Metadata.UID}}
+			if len(runner.Spec.Containers) == 1 {
+				runnerImage = runner.Spec.Containers[0].Image
+			}
 		} else {
 			common.Logger(ctx).Debugf("The runner is not pod %s, job pods get no owner: %v", hostname, err)
 		}
 	}
+	if err := p.setupTransfer(runnerImage); err != nil {
+		return err
+	}
 	secretData := map[string]string{}
 	manifest, err := p.manifest(name, secretData, metadata)
 	if err != nil {
@@ -205,6 +226,18 @@ func (p *KubernetesPod) manifest(secret string, secretData map[string]string, me
 		}
 	}
 	spec := map[string]any{"restartPolicy": "Never", "containers": containers, "volumes": volumes}
+	if p.transferHelper != "" {
+		transfer := map[string]any{
+			"name": "gitea-runner-transfer", "image": p.transferImage, "terminationMessagePolicy": "FallbackToLogsOnError",
+			"command":         []string{"gitea-runner", KubernetesTransferCommand, "install", p.transferHelper},
+			"volumeMounts":    []any{map[string]any{"name": "act", "mountPath": p.job.GetActPath()}},
+			"securityContext": map[string]any{"allowPrivilegeEscalation": false, "capabilities": map[string]any{"drop": []string{"ALL"}}},
+		}
+		if p.options.ForcePull {
+			transfer["imagePullPolicy"] = "Always"
+		}
+		spec["initContainers"] = []any{transfer}
+	}
 	if len(hostnames) > 0 {
 		spec["hostAliases"] = []any{map[string]any{"ip": "127.0.0.1", "hostnames": hostnames}}
 	}
@@ -341,7 +374,13 @@ func (p *KubernetesPod) waitStarted(ctx context.Context) error {
 			return err
 		}
 		if pod.Status.Phase == "Failed" {
-			return fmt.Errorf("pod %s failed: %s", p.name, cmp.Or(pod.Status.Message, pod.Status.Reason))
+			reason := cmp.Or(pod.Status.Message, pod.Status.Reason)
+			for _, status := range append(pod.Status.InitContainerStatuses, pod.Status.ContainerStatuses...) {
+				if terminated := status.State.Terminated; reason == "" && terminated != nil && terminated.ExitCode != 0 {
+					reason = fmt.Sprintf("container %s exited with %d: %s", status.Name, terminated.ExitCode, strings.TrimSpace(terminated.Message))
+				}
+			}
+			return fmt.Errorf("pod %s failed: %s", p.name, reason)
 		}
 		started := len(pod.Status.ContainerStatuses) == len(pod.Spec.Containers)
 		for _, status := range append(pod.Status.InitContainerStatuses, pod.Status.ContainerStatuses...) {
@@ -354,6 +393,9 @@ func (p *KubernetesPod) waitStarted(ctx context.Context) error {
 			}
 		}
 		if started {
+			for _, ip := range pod.Status.PodIPs {
+				p.ips = append(p.ips, net.ParseIP(ip.IP))
+			}
 			return nil
 		}
 		for _, condition := range pod.Status.Conditions {
@@ -391,8 +433,11 @@ func (c *kubernetesContainer) Start(_ bool) common.Executor {
 		if err != nil {
 			return err
 		}
-		machine, path, _ := strings.Cut(output, "\n")
-		c.pod.arch, c.pod.path = goArchToActionArch(machine), path
+		probed := strings.SplitN(output, "\n", 3)
+		for len(probed) < 3 {
+			probed = append(probed, "")
+		}
+		c.pod.arch, c.gzip, c.pod.path = goArchToActionArch(probed[0]), probed[1] == "gzip", probed[2]
 		return nil
 	}
 }
@@ -403,7 +448,7 @@ func (p *KubernetesPod) probe(ctx context.Context, container string) (string, er
 	deadline := time.Now().Add(time.Minute)
 	for delay := 100 * time.Millisecond; ; delay = min(2*delay, 2*time.Second) {
 		var stdout bytes.Buffer
-		err := p.client.exec(ctx, p.name, container, []string{"sh", "-c", `printf '%s\n%s' "$(uname -m)" "$PATH"`}, nil, &stdout, io.Discard)
+		err := p.client.exec(ctx, p.name, container, []string{"sh", "-c", `printf '%s\n%s\n%s' "$(uname -m)" "$(command -v gzip >/dev/null && echo gzip)" "$PATH"`}, nil, &stdout, io.Discard)
 		var exitErr ExitCodeError
 		var apiErr *apiError
 		if err == nil || ctx.Err() != nil || errors.As(err, &exitErr) || time.Now().After(deadline) ||
@@ -452,26 +497,66 @@ func (c *kubernetesContainer) Exec(command []string, env map[string]string, _, w
 	}
 }
 
-func (c *kubernetesContainer) extract(ctx context.Context, destPath string, write func(io.Writer) error) error {
+// compressCopyMin is the size from which Copy compresses and uses the transfer helper: below it that saves next to nothing on the wire and costs a process in the pod.
+const compressCopyMin = 64 << 10
+
+// extract streams the tar write produces into destPath, gzipped with compress, as copied actions shrink about fivefold and API server traffic often crosses zones.
+func (c *kubernetesContainer) extract(ctx context.Context, destPath string, compress bool, write func(io.Writer) error) error {
+	if compress && c.pod.transferHelper != "" {
+		request, done := c.pod.transfer.offer(c.pod.ips, write)
+		stdin, _ := json.Marshal(request)
+		var stderr bytes.Buffer
+		err := c.pod.client.exec(ctx, c.pod.name, c.name, []string{c.pod.transferHelper, KubernetesTransferCommand, "fetch", destPath}, bytes.NewReader(stdin), io.Discard, &stderr)
+		taken, writeErr := done()
+		if err == nil || ctx.Err() != nil {
+			return err
+		}
+		if taken || !c.pod.options.Transfer.Fallback {
+			return fmt.Errorf("copy to %s over the pod network: %w: %s", destPath, errors.Join(writeErr, err), strings.TrimSpace(stderr.String()))
+		}
+		c.pod.transferHelper = "" // a pod that cannot reach the runner once will not later
+		logging.Warnf("Copying into pod %s over the pod network failed, copying through the API server instead: %v: %s", c.pod.name, err, strings.TrimSpace(stderr.String()))
+	}
+	compress = compress && c.gzip
 	reader, writer := io.Pipe()
 	defer reader.Close()
-	go func() { writer.CloseWithError(write(writer)) }()
+	go func() {
+		if compress {
+			writer.CloseWithError(writeGzip(writer, write))
+		} else {
+			writer.CloseWithError(write(writer))
+		}
+	}()
+	script := `mkdir -p "$1" && tar -xf - -C "$1"`
+	if compress {
+		script = `mkdir -p "$1" && gzip -dc | tar -xf - -C "$1"` // gzip -dc rather than tar -z, which GNU tar runs gzip for anyway
+	}
 	var stderr bytes.Buffer
-	if err := c.pod.client.exec(ctx, c.pod.name, c.name, []string{"sh", "-c", `mkdir -p "$1" && tar -xf - -C "$1"`, "sh", destPath}, reader, io.Discard, &stderr); err != nil {
+	if err := c.pod.client.exec(ctx, c.pod.name, c.name, []string{"sh", "-c", script, "sh", destPath}, reader, io.Discard, &stderr); err != nil {
 		return fmt.Errorf("extract to %s: %w: %s", destPath, err, strings.TrimSpace(stderr.String()))
 	}
 	return nil
 }
 
+// writeGzip gzips what write produces into w, at a level fast enough to not slow copies down and nearly as small as the default.
+func writeGzip(w io.Writer, write func(io.Writer) error) error {
+	compressed, _ := gzip.NewWriterLevel(w, gzip.BestSpeed)
+	return errors.Join(write(compressed), compressed.Close())
+}
+
 func (c *kubernetesContainer) Copy(destPath string, files ...*FileEntry) common.Executor {
 	return func(ctx context.Context) error {
-		return c.extract(ctx, destPath, func(writer io.Writer) error { return writeFilesTar(ctx, writer, 0, 0, files...) })
+		size := 0
+		for _, file := range files {
+			size += len(file.Body)
+		}
+		return c.extract(ctx, destPath, size >= compressCopyMin, func(writer io.Writer) error { return writeFilesTar(ctx, writer, 0, 0, files...) })
 	}
 }
 
 func (c *kubernetesContainer) CopyDir(destPath, srcPath string, useGitIgnore, skipGitDir bool) common.Executor {
 	return func(ctx context.Context) error {
-		return c.extract(ctx, destPath, func(writer io.Writer) error {
+		return c.extract(ctx, destPath, true, func(writer io.Writer) error { // directories are actions and workspaces, megabytes of compressible sources
 			return writeDirTar(ctx, writer, "/", srcPath, useGitIgnore, skipGitDir, 0, 0)
 		})
 	}

act/container/kubernetes_test.go

@@ -260,6 +260,7 @@ func TestKubernetesPodRunsJobThroughAPI(t *testing.T) {
 	)
 	require.NoError(t, job.Start(false)(ctx))
 	assert.Len(t, cluster.requests["exec"], 3)
+	assert.True(t, pod.job.gzip)
 
 	stepEnv := map[string]string{"INPUT_WHO-TO-GREET": "it's\nme", "SECRET": "hunter2", "UID": "5"}
 	require.NoError(t, job.Exec([]string{"printenv", "SECRET"}, stepEnv, "", "")(ctx))
@@ -276,7 +277,9 @@ func TestKubernetesPodRunsJobThroughAPI(t *testing.T) {
 		assert.NotContains(t, query, "hunter2")
 	}
 
+	lastExec := func() string { return cluster.requests["exec"][len(cluster.requests["exec"])-1] }
 	require.NoError(t, job.Copy(workdir+"/act/", &FileEntry{Name: "workflow/event.json", Mode: 0o644, Body: `{"ref":"main"}`})(ctx))
+	assert.NotContains(t, lastExec(), "gzip")
 	archive, err := job.GetContainerArchive(ctx, workdir+"/act/workflow/event.json")
 	require.NoError(t, err)
 	reader := tar.NewReader(archive)
@@ -289,6 +292,12 @@ func TestKubernetesPodRunsJobThroughAPI(t *testing.T) {
 	require.NoError(t, archive.Close())
 	_, err = job.GetContainerArchive(ctx, workdir+"/missing")
 	require.Error(t, err)
+	large := strings.Repeat("a", compressCopyMin)
+	require.NoError(t, job.Copy(workdir+"/act/", &FileEntry{Name: "workflow/large", Mode: 0o644, Body: large})(ctx))
+	assert.Contains(t, lastExec(), url.QueryEscape("gzip -dc |"))
+	content, err = os.ReadFile(workdir + "/act/workflow/large")
+	require.NoError(t, err)
+	assert.Equal(t, large, string(content))
 
 	actionDir := filepath.Join(t.TempDir(), "action")
 	require.NoError(t, os.MkdirAll(actionDir, 0o755))
@@ -297,7 +306,8 @@ func TestKubernetesPodRunsJobThroughAPI(t *testing.T) {
 	script, err := os.ReadFile(workdir + "/act/actions/sha/index.js")
 	require.NoError(t, err)
 	assert.Equal(t, "main()", string(script))
-	assert.Contains(t, cluster.requests["exec"][len(cluster.requests["exec"])-1], "command="+url.QueryEscape(workdir+"/act/actions/sha/"))
+	assert.Contains(t, lastExec(), "command="+url.QueryEscape(workdir+"/act/actions/sha/"))
+	assert.Contains(t, lastExec(), url.QueryEscape("gzip -dc |"))
 
 	pathEnv := map[string]string{}
 	require.NoError(t, job.UpdateFromImageEnv(&pathEnv)(ctx))
@@ -321,6 +331,38 @@ func TestKubernetesPodRunsJobThroughAPI(t *testing.T) {
 	assert.Empty(t, cluster.requests["DELETE /api/v1/namespaces/ci/secrets/new"])
 }
 
+func TestKubernetesCopiesUncompressedWithoutGzip(t *testing.T) {
+	t.Parallel()
+	if runtime.GOOS == "windows" {
+		t.Skip("uses POSIX shell")
+	}
+	ctx := t.Context()
+	workdir, bin := t.TempDir(), t.TempDir()
+	for _, tool := range []string{"uname", "tar", "mkdir"} { // all the job container needs but gzip, as on a minimal image
+		found, err := exec.LookPath(tool)
+		require.NoError(t, err)
+		require.NoError(t, os.Symlink(found, filepath.Join(bin, tool)))
+	}
+	kubeconfig, cluster := fakeKubernetes(t, `{"spec":{"containers":[{}]},"status":{"phase":"Running","containerStatuses":[
+		{"name":"job","ready":true,"state":{"running":{}}}]}}`, "PATH="+bin)
+	pod, err := NewKubernetesPod(KubernetesOptions{Kubeconfig: kubeconfig})
+	require.NoError(t, err)
+	job := pod.JobContainer(&NewContainerInput{Image: "node", WorkingDir: workdir})
+	require.NoError(t, job.Create(nil, nil)(ctx))
+	require.NoError(t, job.Start(false)(ctx))
+	assert.False(t, pod.job.gzip)
+	assert.Equal(t, bin, pod.path)
+
+	actionDir := filepath.Join(t.TempDir(), "action")
+	require.NoError(t, os.MkdirAll(actionDir, 0o755))
+	require.NoError(t, os.WriteFile(filepath.Join(actionDir, "index.js"), []byte("main()"), 0o644))
+	require.NoError(t, job.CopyDir(workdir+"/act/actions/sha/", actionDir+"/", false, false)(ctx))
+	script, err := os.ReadFile(workdir + "/act/actions/sha/index.js")
+	require.NoError(t, err)
+	assert.Equal(t, "main()", string(script))
+	assert.NotContains(t, cluster.requests["exec"][len(cluster.requests["exec"])-1], "gzip")
+}
+
 func TestKubernetesPodFailsBeforeSteps(t *testing.T) {
 	kubeconfig, _ := fakeKubernetes(t, `{"spec":{"containers":[{}]},"status":{"containerStatuses":[
 		{"name":"job","state":{"waiting":{"reason":"ErrImagePull","message":"no such image"}}}]}}`)
@@ -361,6 +403,13 @@ func TestKubernetesPodFailsBeforeSteps(t *testing.T) {
 	job := pod.JobContainer(&NewContainerInput{Image: "missing"})
 	require.NoError(t, job.Create(nil, nil)(t.Context()))
 	require.ErrorContains(t, job.Start(false)(t.Context()), "ErrImagePull: no such image")
+	failed, _ := fakeKubernetes(t, `{"spec":{"containers":[{}]},"status":{"phase":"Failed","initContainerStatuses":[
+		{"name":"gitea-runner-transfer","state":{"terminated":{"exitCode":1,"message":"exec format error\n"}}}]}}`)
+	pod, err = NewKubernetesPod(KubernetesOptions{Kubeconfig: failed})
+	require.NoError(t, err)
+	job = pod.JobContainer(&NewContainerInput{Image: "node"})
+	require.NoError(t, job.Create(nil, nil)(t.Context()))
+	require.ErrorContains(t, job.Start(false)(t.Context()), "container gitea-runner-transfer exited with 1: exec format error")
 
 	plugin := filepath.Join(t.TempDir(), "kubeconfig")
 	require.NoError(t, os.WriteFile(plugin, []byte(`

act/container/kubernetes_transfer.go

@@ -0,0 +1,248 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"cmp"
+	"context"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/sha256"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math/big"
+	"net"
+	"net/http"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"slices"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"gitea.com/gitea/runner/act/common"
+	"gitea.com/gitea/runner/act/common/logging"
+)
+
+// KubernetesTransfer has job pods fetch large copies from the runner over the pod network instead of through the API server.
+type KubernetesTransfer struct {
+	Host     string // empty uses the outbound IP
+	Port     uint16 // 0 picks a free port
+	Image    string // has gitea-runner on its PATH, for an init container to copy into each job pod
+	Fallback bool   // copy through the API server when a job pod cannot reach the runner, else fail
+}
+
+// KubernetesTransferCommand is the hidden runner subcommand job pods run the transfer helper with.
+const KubernetesTransferCommand = "kubernetes-transfer"
+
+// transferRequest goes to the helper on the exec stream's stdin, keeping the token out of the command line and the audit log.
+type transferRequest struct {
+	URL string `json:"url"`
+	Pin string `json:"pin"` // hex SHA-256 of the runner's certificate
+}
+
+type transferServer struct {
+	base    string
+	pin     string
+	mu      sync.Mutex
+	pending map[string]transferOffer
+}
+
+type transferOffer struct {
+	clients []net.IP
+	write   func(io.Writer) error
+	result  chan error
+}
+
+var (
+	transferServersMu sync.Mutex
+	transferServers   = map[string]*transferServer{}
+)
+
+// startTransferServer returns the runner's server for these settings, started on first use.
+func startTransferServer(host string, port uint16) (*transferServer, error) {
+	transferServersMu.Lock()
+	defer transferServersMu.Unlock()
+	configured := net.JoinHostPort(host, strconv.Itoa(int(port)))
+	if server, ok := transferServers[configured]; ok {
+		return server, nil
+	}
+	if host == "" {
+		ip := common.GetOutboundIP()
+		if ip == nil {
+			return nil, errors.New("no outbound IP for job pods to reach the runner at, set kubernetes.transfer.host")
+		}
+		host = ip.String()
+	}
+	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		return nil, err
+	}
+	template := &x509.Certificate{SerialNumber: big.NewInt(1)} // trusted by its pin alone, so no CA, names or validity
+	certificate, err := x509.CreateCertificate(rand.Reader, template, template, &privateKey.PublicKey, privateKey)
+	if err != nil {
+		return nil, err
+	}
+	listener, err := net.Listen("tcp", net.JoinHostPort(host, strconv.Itoa(int(port))))
+	if err != nil {
+		return nil, fmt.Errorf("listen for job pod transfers: %w", err)
+	}
+	pin := sha256.Sum256(certificate)
+	server := &transferServer{base: "https://" + listener.Addr().String() + "/", pin: hex.EncodeToString(pin[:]), pending: map[string]transferOffer{}}
+	httpServer := &http.Server{
+		Handler:           server,
+		TLSConfig:         &tls.Config{Certificates: []tls.Certificate{{Certificate: [][]byte{certificate}, PrivateKey: privateKey}}, MinVersion: tls.VersionTLS13},
+		ReadHeaderTimeout: 10 * time.Second,
+		IdleTimeout:       30 * time.Second,
+	}
+	go func() { _ = httpServer.ServeTLS(listener, "", "") }()
+	transferServers[configured] = server
+	return server, nil
+}
+
+// offer serves write once to one of clients until done, which reports whether a client took it and what write failed with.
+func (s *transferServer) offer(clients []net.IP, write func(io.Writer) error) (request transferRequest, done func() (taken bool, err error)) {
+	token := rand.Text()
+	result := make(chan error, 1)
+	s.mu.Lock()
+	s.pending[token] = transferOffer{clients: clients, write: write, result: result}
+	s.mu.Unlock()
+	return transferRequest{URL: s.base + token, Pin: s.pin}, func() (bool, error) {
+		s.mu.Lock()
+		_, pending := s.pending[token]
+		delete(s.pending, token)
+		s.mu.Unlock()
+		select {
+		case err := <-result:
+			return true, err
+		default:
+			return !pending, nil
+		}
+	}
+}
+
+func (s *transferServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	host, _, _ := net.SplitHostPort(r.RemoteAddr)
+	token := strings.TrimPrefix(r.URL.Path, "/")
+	s.mu.Lock()
+	offer, ok := s.pending[token]
+	ok = ok && r.Method == http.MethodGet && slices.ContainsFunc(offer.clients, net.ParseIP(host).Equal)
+	if ok {
+		delete(s.pending, token)
+	}
+	s.mu.Unlock()
+	if !ok {
+		http.NotFound(w, r)
+		return
+	}
+	w.Header().Set("Content-Encoding", "gzip")
+	err := writeGzip(w, offer.write)
+	offer.result <- err
+	if err != nil {
+		panic(http.ErrAbortHandler) // a cut-off body fails the fetch, a short tar might not
+	}
+}
+
+// FetchKubernetesTransfer reads a transferRequest from request and extracts the tar it points to into dest.
+func FetchKubernetesTransfer(ctx context.Context, request io.Reader, dest string) error {
+	var transfer transferRequest
+	if err := json.NewDecoder(request).Decode(&transfer); err != nil {
+		return fmt.Errorf("read transfer request: %w", err)
+	}
+	client := &http.Client{Transport: &http.Transport{
+		DialContext:           (&net.Dialer{Timeout: 10 * time.Second}).DialContext,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ResponseHeaderTimeout: time.Minute,
+		TLSClientConfig: &tls.Config{
+			MinVersion:         tls.VersionTLS13,
+			InsecureSkipVerify: true, // VerifyConnection checks the pin instead
+			VerifyConnection: func(state tls.ConnectionState) error {
+				if sum := sha256.Sum256(state.PeerCertificates[0].Raw); hex.EncodeToString(sum[:]) != transfer.Pin {
+					return errors.New("runner certificate does not match the pin")
+				}
+				return nil
+			},
+		},
+	}}
+	httpRequest, err := http.NewRequestWithContext(ctx, http.MethodGet, transfer.URL, nil)
+	if err != nil {
+		return err
+	}
+	response, err := client.Do(httpRequest)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode != http.StatusOK {
+		return fmt.Errorf("fetch: %s", response.Status)
+	}
+	if err := os.MkdirAll(dest, 0o777); err != nil {
+		return err
+	}
+	cmd := exec.CommandContext(ctx, "tar", "-xf", "-", "-C", dest)
+	cmd.Stdin, cmd.Stdout, cmd.Stderr = response.Body, os.Stderr, os.Stderr
+	if err := cmd.Run(); err != nil {
+		return err
+	}
+	_, err = io.Copy(io.Discard, response.Body) // tar stops at the first zero blocks, a cut-off body after them still fails
+	return err
+}
+
+// InstallKubernetesTransferHelper copies the running binary to target.
+func InstallKubernetesTransferHelper(target string) error {
+	executable, err := os.Executable()
+	if err != nil {
+		return err
+	}
+	source, err := os.Open(executable)
+	if err != nil {
+		return err
+	}
+	defer source.Close()
+	if err := os.MkdirAll(filepath.Dir(target), 0o755); err != nil {
+		return err
+	}
+	_ = os.Remove(target) // a file left in a reused act volume would keep its mode
+	file, err := os.OpenFile(target, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0o755)
+	if err != nil {
+		return err
+	}
+	_, err = io.Copy(file, source)
+	return errors.Join(err, file.Close())
+}
+
+// setupTransfer turns on transfers for the pod, with the runner pod's image unless one is set.
+func (p *KubernetesPod) setupTransfer(runnerImage string) error {
+	settings := p.options.Transfer
+	if settings == nil {
+		return nil
+	}
+	image := cmp.Or(settings.Image, runnerImage)
+	var err error
+	var server *transferServer
+	if image == "" {
+		err = errors.New("set kubernetes.transfer.image, the runner is no single-container pod in kubernetes.namespace to take it from")
+	} else {
+		server, err = startTransferServer(settings.Host, settings.Port)
+	}
+	if err != nil {
+		if !settings.Fallback {
+			return fmt.Errorf("kubernetes.transfer: %w", err)
+		}
+		logging.Warnf("Job pod copies go through the API server: %v", err)
+		return nil
+	}
+	p.transfer, p.transferImage = server, image
+	p.transferHelper = path.Join(p.job.GetActPath(), "bin", "gitea-runner")
+	return nil
+}

act/container/kubernetes_transfer_test.go

@@ -0,0 +1,185 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"bytes"
+	"context"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const transferHelperEnv = "GITEA_RUNNER_TEST_TRANSFER_HELPER"
+
+func TestMain(m *testing.M) {
+	if os.Getenv(transferHelperEnv) == "1" && len(os.Args) == 4 && os.Args[1] == KubernetesTransferCommand && os.Args[2] == "fetch" {
+		if err := FetchKubernetesTransfer(context.Background(), os.Stdin, os.Args[3]); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+		os.Exit(0)
+	}
+	os.Exit(m.Run())
+}
+
+func fetch(t *testing.T, request transferRequest) error {
+	t.Helper()
+	body, err := json.Marshal(request)
+	require.NoError(t, err)
+	return FetchKubernetesTransfer(t.Context(), bytes.NewReader(body), t.TempDir())
+}
+
+func TestTransferServer(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("extracts with tar")
+	}
+	server, err := startTransferServer("127.0.0.1", 0)
+	require.NoError(t, err)
+	again, err := startTransferServer("127.0.0.1", 0)
+	require.NoError(t, err)
+	assert.Same(t, server, again)
+	loopback := []net.IP{net.ParseIP("127.0.0.1")}
+	nothing := func(io.Writer) error { return nil }
+
+	t.Run("serves an offer gzipped once to an IP of its job pod", func(t *testing.T) {
+		request, done := server.offer([]net.IP{net.ParseIP("fd00::1"), loopback[0]}, nothing)
+		client := &http.Client{Transport: &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, DisableCompression: true}}
+		response, err := client.Get(request.URL)
+		require.NoError(t, err)
+		require.NoError(t, response.Body.Close())
+		assert.Equal(t, "gzip", response.Header.Get("Content-Encoding"))
+		require.ErrorContains(t, fetch(t, request), "404")
+		taken, _ := done()
+		assert.True(t, taken)
+	})
+
+	t.Run("another pod can neither take nor block an offer", func(t *testing.T) {
+		request, done := server.offer([]net.IP{net.ParseIP("10.1.2.3")}, nothing)
+		require.ErrorContains(t, fetch(t, request), "404")
+		taken, _ := done()
+		assert.False(t, taken)
+	})
+
+	t.Run("a failed write fails the fetch even past the end blocks tar stops at, and done reports it", func(t *testing.T) {
+		request, done := server.offer(loopback, func(w io.Writer) error {
+			_, _ = w.Write(make([]byte, 1024))
+			_, _ = io.CopyN(w, rand.Reader, 1<<20)
+			return errors.New("source gone")
+		})
+		require.Error(t, fetch(t, request))
+		taken, err := done()
+		assert.True(t, taken)
+		require.EqualError(t, err, "source gone")
+	})
+
+	t.Run("the helper refuses a runner whose certificate does not match its pin", func(t *testing.T) {
+		request, done := server.offer(loopback, nothing)
+		request.Pin = strings.Repeat("0", 64)
+		require.ErrorContains(t, fetch(t, request), "does not match the pin")
+		taken, _ := done()
+		assert.False(t, taken)
+	})
+}
+
+func TestKubernetesPodTransferImage(t *testing.T) {
+	newPod := func(image string, fallback bool) *KubernetesPod {
+		pod := &KubernetesPod{options: KubernetesOptions{Transfer: &KubernetesTransfer{Host: "127.0.0.1", Image: image, Fallback: fallback}}}
+		pod.JobContainer(&NewContainerInput{})
+		return pod
+	}
+
+	pod := newPod("", false)
+	require.NoError(t, pod.setupTransfer("gitea/runner:latest"))
+	assert.Equal(t, "gitea/runner:latest", pod.transferImage)
+
+	pod = newPod("registry.example/runner:1", false)
+	require.NoError(t, pod.setupTransfer("gitea/runner:latest"))
+	assert.Equal(t, "registry.example/runner:1", pod.transferImage)
+
+	pod = newPod("", true)
+	require.NoError(t, pod.setupTransfer(""))
+	assert.Empty(t, pod.transferHelper)
+
+	pod = newPod("", false)
+	require.ErrorContains(t, pod.setupTransfer(""), "kubernetes.transfer.image")
+}
+
+func TestKubernetesPodCopiesLargeFilesOverPodNetwork(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("uses POSIX shell")
+	}
+	ctx := t.Context()
+	workdir, err := filepath.EvalSymlinks(t.TempDir())
+	require.NoError(t, err)
+	kubeconfig, cluster := fakeKubernetes(t, `{"spec":{"containers":[{}]},"status":{"phase":"Running","podIPs":[{"ip":"127.0.0.1"}],"containerStatuses":[
+		{"name":"job","ready":true,"state":{"running":{}}}]}}`, transferHelperEnv+"=1")
+	pod, err := NewKubernetesPod(KubernetesOptions{Kubeconfig: kubeconfig, ForcePull: true, Transfer: &KubernetesTransfer{Host: "127.0.0.1", Image: "gitea/runner:latest", Fallback: true}})
+	require.NoError(t, err)
+	job := pod.JobContainer(&NewContainerInput{Name: "job", Image: "node", WorkingDir: workdir, Stdout: io.Discard, Stderr: io.Discard})
+	require.NoError(t, job.Create(nil, nil)(ctx))
+
+	var manifest struct {
+		Spec struct {
+			InitContainers []struct {
+				Image, ImagePullPolicy string
+				Command                []string
+				VolumeMounts           []struct{ Name, MountPath string }
+			}
+		}
+	}
+	require.NoError(t, json.Unmarshal([]byte(cluster.requests["POST /api/v1/namespaces/ci/pods"][0]), &manifest))
+	require.Len(t, manifest.Spec.InitContainers, 1)
+	initContainer := manifest.Spec.InitContainers[0]
+	assert.Equal(t, "gitea/runner:latest", initContainer.Image)
+	assert.Equal(t, "Always", initContainer.ImagePullPolicy)
+	assert.Equal(t, []string{"gitea-runner", KubernetesTransferCommand, "install", "/var/run/act/bin/gitea-runner"}, initContainer.Command)
+	assert.Equal(t, []struct{ Name, MountPath string }{{"act", "/var/run/act"}}, initContainer.VolumeMounts)
+	require.NoError(t, job.Start(false)(ctx))
+
+	helper := filepath.Join(t.TempDir(), "bin", "gitea-runner")
+	require.NoError(t, InstallKubernetesTransferHelper(helper))
+	pod.transferHelper = helper
+	lastExec := func() string { return cluster.requests["exec"][len(cluster.requests["exec"])-1] }
+	large := &FileEntry{Name: "large", Mode: 0o644, Body: strings.Repeat("a", compressCopyMin)}
+	copyLarge := func(dir string) error { return job.Copy(filepath.Join(workdir, dir)+"/", large)(ctx) }
+	require.NoError(t, copyLarge("transferred"))
+	content, err := os.ReadFile(filepath.Join(workdir, "transferred", "large"))
+	require.NoError(t, err)
+	assert.Equal(t, large.Body, string(content))
+	assert.Contains(t, lastExec(), "command="+KubernetesTransferCommand)
+	assert.NotContains(t, lastExec(), "127.0.0.1")
+
+	require.NoError(t, job.Copy(workdir+"/act/", &FileEntry{Name: "event.json", Mode: 0o644, Body: `{}`})(ctx))
+	assert.NotContains(t, lastExec(), "command="+KubernetesTransferCommand)
+
+	require.NoError(t, os.WriteFile(filepath.Join(workdir, "file"), nil, 0o644))
+	require.ErrorContains(t, copyLarge("file"), "over the pod network")
+	assert.Equal(t, helper, pod.transferHelper)
+
+	unreachable := filepath.Join(workdir, "unreachable")
+	require.NoError(t, os.WriteFile(unreachable, []byte("#!/bin/sh\necho 'connection refused' >&2\nexit 1\n"), 0o755))
+	pod.transferHelper = unreachable
+	pod.options.Transfer.Fallback = false
+	require.ErrorContains(t, copyLarge("direct"), "connection refused")
+	assert.NoFileExists(t, filepath.Join(workdir, "direct", "large"))
+
+	pod.options.Transfer.Fallback = true
+	require.NoError(t, copyLarge("auto"))
+	assert.FileExists(t, filepath.Join(workdir, "auto", "large"))
+	assert.Empty(t, pod.transferHelper)
+}

act/runner/action.go

@@ -180,9 +180,9 @@ func runActionImpl(step actionStep, actionDir string, remoteAction *remoteAction
 
 		action := step.getActionModel()
 
-		rc.withGithubEnv(ctx, step.getGithubContext(ctx), *step.getEnv())
+		rc.withGithubEnv(ctx, getStepGithubContext(ctx, step), *step.getEnv())
 		populateEnvsFromSavedState(step.getEnv(), step, rc)
-		if err := populateEnvsFromInput(ctx, step.getEnv(), action, rc); err != nil {
+		if err := populateEnvsFromInput(ctx, step, action); err != nil {
 			return err
 		}
 		warnUnexpectedInputs(ctx, action, stepModel.With)
@@ -283,7 +283,7 @@ func (rc *RunContext) dockerActionImage(ctx context.Context, step actionStep, ac
 	}
 	image, ok := job.dockerActionImages[step.getStepModel()]
 	if !ok {
-		image = dockerActionImageTag(step.getGithubContext(ctx).Repository, actionName, localAction) + "-" + strings.ToLower(rand.Text())
+		image = dockerActionImageTag(getStepGithubContext(ctx, step).Repository, actionName, localAction) + "-" + strings.ToLower(rand.Text())
 		if !common.Dryrun(ctx) { // a dry run builds nothing to remove
 			job.dockerActionImages[step.getStepModel()] = image
 		}
@@ -437,7 +437,7 @@ func evalDockerEnv(ctx context.Context, step step, action *model.Action) (*expre
 	for key := range step.getStepModel().With {
 		providedInputs[strings.ToLower(key)] = true
 	}
-	eval := rc.NewExpressionEvaluator(ctx)
+	eval := rc.NewStepExpressionEvaluator(ctx, step)
 	for k, input := range action.Inputs {
 		if providedInputs[strings.ToLower(k)] {
 			continue
@@ -456,6 +456,7 @@ func evalDockerEnv(ctx context.Context, step step, action *model.Action) (*expre
 		}
 	}
 	mergeIntoMap(step, step.getEnv(), runsEnv, maps.Clone(*step.getEnv()))
+	aliasGiteaEnv(*step.getEnv())
 	return ee, nil
 }
 
@@ -509,8 +510,9 @@ func inputEnvKey(inputID string) string {
 	return "INPUT_" + inputEnvPattern.ReplaceAllString(strings.ToUpper(inputID), "_")
 }
 
-func populateEnvsFromInput(ctx context.Context, env *map[string]string, action *model.Action, rc *RunContext) error {
-	eval := rc.NewExpressionEvaluator(ctx)
+func populateEnvsFromInput(ctx context.Context, step step, action *model.Action) error {
+	env := step.getEnv()
+	eval := step.getRunContext().NewStepExpressionEvaluator(ctx, step)
 	for inputID, input := range action.Inputs {
 		envKey := inputEnvKey(inputID)
 		if _, ok := (*env)[envKey]; !ok {
@@ -652,7 +654,7 @@ func runPreStep(step actionStep) common.Executor {
 		x := action.Runs.Using
 		if !x.IsComposite() {
 			// defaults in pre steps were missing, however provided inputs are available
-			if err := populateEnvsFromInput(ctx, step.getEnv(), action, rc); err != nil {
+			if err := populateEnvsFromInput(ctx, step, action); err != nil {
 				return err
 			}
 		}

act/runner/action_composite.go

@@ -57,9 +57,6 @@ func evaluateCompositeInputAndEnv(ctx context.Context, parent *RunContext, step
 			env[envKey] = value
 		}
 	}
-	gh := step.getGithubContext(ctx)
-	env["GITHUB_ACTION_REPOSITORY"] = gh.ActionRepository
-	env["GITHUB_ACTION_REF"] = gh.ActionRef
 
 	return env, nil
 }
@@ -110,6 +107,7 @@ func newCompositeRunContext(ctx context.Context, parent *RunContext, step action
 		kubernetes:    parent.kubernetes,
 		jobIndex:      parent.jobIndex,
 		jobTotal:      parent.jobTotal,
+		runtimeToken:  parent.runtimeToken,
 	}
 	compositerc.setCompositeActionEnv(env)
 	compositerc.ExprEval = compositerc.NewExpressionEvaluator(ctx)

act/runner/action_composite_test.go

@@ -19,6 +19,35 @@ import (
 )
 
 func TestCompositeActionParity(t *testing.T) {
+	t.Run("input defaults use the step identity and docker env keeps the GITEA aliases", func(t *testing.T) {
+		for _, uses := range []string{"./action", "own/action@v2"} {
+			t.Run(uses, func(t *testing.T) {
+				rc := &RunContext{
+					Config: &Config{PresetGitHubContext: &model.GithubContext{}},
+					Run:    &model.Run{JobID: "job", Workflow: &model.Workflow{Jobs: map[string]*model.Job{"job": {}}}},
+					Env:    map[string]string{"GITHUB_ACTION_REPOSITORY": "other/composite", "GITHUB_ACTION_REF": "v1"},
+				}
+				var currentStep step = &stepActionLocal{RunContext: rc, Step: &model.Step{Uses: uses}, env: map[string]string{}}
+				want := "|"
+				if uses == "own/action@v2" {
+					currentStep = &stepActionRemote{RunContext: rc, Step: &model.Step{Uses: uses}, env: map[string]string{}, remoteAction: mustNewRemoteAction(t, uses)}
+					want = "own/action|v2"
+				}
+				action := &model.Action{
+					Inputs: map[string]model.Input{"identity": {Default: "${{ github.action_repository }}|${{ github.action_ref }}"}},
+					Runs:   model.ActionRuns{Env: map[string]string{"GITHUB_WORKFLOW_SHA": "runs-sha"}},
+				}
+				require.NoError(t, setupEnv(t.Context(), currentStep))
+				require.NoError(t, populateEnvsFromInput(t.Context(), currentStep, action))
+				assert.Equal(t, want, (*currentStep.getEnv())["INPUT_IDENTITY"])
+				_, err := evalDockerEnv(t.Context(), currentStep, action)
+				require.NoError(t, err)
+				assert.Equal(t, want, (*currentStep.getEnv())["identity"])
+				assert.Equal(t, "runs-sha", (*currentStep.getEnv())["GITEA_WORKFLOW_SHA"])
+			})
+		}
+	})
+
 	t.Run("inherits contexts without leaking inputs", func(t *testing.T) {
 		hook := logtest.NewWithLevel(logging.LevelWarn)
 		ctx := common.WithLogger(t.Context(), logging.New(hook))
@@ -54,7 +83,7 @@ func TestCompositeActionParity(t *testing.T) {
 		assert.NotContains(t, composite.Env, "INPUT_EXTRA")
 
 		nestedEnv := composite.GetEnv()
-		require.NoError(t, populateEnvsFromInput(ctx, &nestedEnv, &model.Action{Inputs: map[string]model.Input{"shared": {Default: "inner-default"}}}, composite))
+		require.NoError(t, populateEnvsFromInput(ctx, &stepActionLocal{RunContext: composite, env: nestedEnv}, &model.Action{Inputs: map[string]model.Input{"shared": {Default: "inner-default"}}}))
 		assert.Equal(t, "inner-default", nestedEnv["INPUT_SHARED"])
 	})
 

act/runner/expression.go

@@ -90,18 +90,18 @@ var hashfiles string
 
 // NewStepExpressionEvaluator creates a new evaluator with the `inputs` of the enclosing workflow or composite action
 func (rc *RunContext) NewStepExpressionEvaluator(ctx context.Context, step step) *ExpressionEvaluator {
-	return rc.newStepExpressionEvaluator(ctx, step, rc.actionInputs, rc.getJobContext())
+	return rc.newStepExpressionEvaluator(ctx, step, rc.actionInputs, rc.getJobContext(), getStepGithubContext(ctx, step))
 }
 
 // NewActionInputsExpressionEvaluator creates a new evaluator with the step's own with: values as `inputs`
 func (rc *RunContext) NewActionInputsExpressionEvaluator(ctx context.Context, step step) *ExpressionEvaluator {
-	return rc.newStepExpressionEvaluator(ctx, step, inputsFromEnv(*step.getEnv()), rc.getJobContext())
+	return rc.newStepExpressionEvaluator(ctx, step, inputsFromEnv(*step.getEnv()), rc.getJobContext(), getStepGithubContext(ctx, step))
 }
 
-func (rc *RunContext) newStepExpressionEvaluator(ctx context.Context, step step, stepInputs map[string]any, jobContext *model.JobContext) *ExpressionEvaluator {
+func (rc *RunContext) newStepExpressionEvaluator(ctx context.Context, step step, stepInputs map[string]any, jobContext *model.JobContext, github *model.GithubContext) *ExpressionEvaluator {
 	// todo: cleanup EvaluationEnvironment creation
 	ee := &exprparser.EvaluationEnvironment{
-		Github:   step.getGithubContext(ctx),
+		Github:   github,
 		Env:      *step.getEnv(),
 		Job:      jobContext,
 		Steps:    rc.StepResults,
@@ -112,7 +112,7 @@ func (rc *RunContext) newStepExpressionEvaluator(ctx context.Context, step step,
 		Needs:    exprparser.NeedsContext(rc.Run),
 		// todo: should be unavailable
 		// but required to interpolate/evaluate the inputs in actions/composite
-		Inputs:    getEvaluatorInputs(rc, stepInputs, rc.getGithubContext(ctx)),
+		Inputs:    getEvaluatorInputs(rc, stepInputs, github),
 		HashFiles: getHashFilesFunction(ctx, rc),
 	}
 	ee.Runner = rc.getRunnerContext(ctx)
@@ -332,5 +332,10 @@ func getWorkflowSecrets(rc *RunContext) map[string]string {
 	if rc.caller != nil {
 		return rc.workflowCallSecrets
 	}
-	return rc.Config.Secrets
+	if rc.runtimeToken == "" {
+		return rc.Config.Secrets
+	}
+	secrets := map[string]string{"ACTIONS_RUNTIME_TOKEN": rc.runtimeToken} // as the daemon exposes its token
+	maps.Copy(secrets, rc.Config.Secrets)
+	return secrets
 }

act/runner/expression_test.go

@@ -504,7 +504,7 @@ jobs:
 	assert.Equal(t, "workflow", env["INPUT_FALLBACK"])
 }
 
-func TestResolveWorkflowCallToleratesMismatchesAndPassesInheritedSecretsVerbatim(t *testing.T) {
+func TestResolveWorkflowCallToleratesMismatchesAndPassesInheritedSecretsAndRuntimeToken(t *testing.T) {
 	callerWorkflow, err := model.ReadWorkflow(strings.NewReader(`
 jobs:
   call:
@@ -527,7 +527,11 @@ jobs:
 	require.NoError(t, err)
 	notCallable, err := model.ReadWorkflow(strings.NewReader("on: push\njobs:\n  test: {}\n"))
 	require.NoError(t, err)
-	config := &Config{Secrets: map[string]string{"token": "${{ github.token }}"}, PresetGitHubContext: &model.GithubContext{}}
+	config := &Config{
+		Secrets:             map[string]string{"token": "${{ github.token }}"},
+		PresetGitHubContext: &model.GithubContext{},
+		RuntimeTokens:       map[*model.Workflow]string{callerWorkflow: "caller-run"},
+	}
 	resolve := func(callerJobID string, workflow *model.Workflow) *RunContext {
 		parent, err := (&runnerImpl{config: config}).newRunContext(t.Context(), &model.Run{Workflow: callerWorkflow, JobID: callerJobID}, nil)
 		require.NoError(t, err)
@@ -539,9 +543,10 @@ jobs:
 	called := resolve("call", callee)
 	assert.Equal(t, map[string]any{"flag": true}, called.workflowCallInputs)
 	assert.Equal(t, map[string]string{"undeclared": "${{ github.token }}"}, called.workflowCallSecrets)
+	assert.Equal(t, "caller-run", called.GetEnv()["ACTIONS_RUNTIME_TOKEN"])
 	inherited := resolve("inherit", notCallable)
 	assert.Empty(t, inherited.workflowCallInputs)
-	assert.Equal(t, config.Secrets, inherited.workflowCallSecrets)
+	assert.Equal(t, map[string]string{"token": "${{ github.token }}", "ACTIONS_RUNTIME_TOKEN": "caller-run"}, inherited.workflowCallSecrets)
 }
 
 func TestJobNameMasksSecrets(t *testing.T) {

act/runner/job_executor.go

@@ -111,7 +111,7 @@ func printPrepareActions(rc *RunContext, preparers []actionPreparer) common.Exec
 			if !ok || strings.Contains(action.Step.Uses, "${{") || action.action != nil {
 				continue
 			}
-			github := action.getGithubContext(common.WithLogger(ctx, logging.New(logging.DiscardHandler)))
+			github := action.RunContext.getGithubContext(common.WithLogger(ctx, logging.New(logging.DiscardHandler)))
 			remote, err := newRemoteAction(action.Step.Uses, github, action.RunContext.Config.GitHubInstance)
 			if err != nil || action.skipsLocalCheckout(remote, github) {
 				continue

act/runner/job_executor_test.go

@@ -1047,23 +1047,25 @@ func makeTestRC(t *testing.T, jobYAML string) *RunContext {
 
 func TestApplyJobTimeout(t *testing.T) {
 	cases := []struct {
-		name        string
-		yaml        string
-		wantTimeout bool
+		name string
+		yaml string
+		want time.Duration
 	}{
-		{"empty", "runs-on: ubuntu-latest", false},
-		{"integer", "timeout-minutes: 5\nruns-on: ubuntu-latest", true},
-		{"zero ignored", "timeout-minutes: 0\nruns-on: ubuntu-latest", false},
-		{"non-numeric ignored", "timeout-minutes: abc\nruns-on: ubuntu-latest", false},
+		{"empty", "runs-on: ubuntu-latest", 0},
+		{"integer", "timeout-minutes: 5\nruns-on: ubuntu-latest", 5 * time.Minute},
+		{"zero ignored", "timeout-minutes: 0\nruns-on: ubuntu-latest", 0},
+		{"non-numeric ignored", "timeout-minutes: abc\nruns-on: ubuntu-latest", 0},
 	}
 	for _, tc := range cases {
 		t.Run(tc.name, func(t *testing.T) {
 			rc := makeTestRC(t, tc.yaml)
-			ctx := t.Context()
-			newCtx, cancel := applyJobTimeout(ctx, rc, rc.Run.Job())
+			newCtx, cancel := applyJobTimeout(t.Context(), rc, rc.Run.Job())
 			defer cancel()
-			_, hasDeadline := newCtx.Deadline()
-			assert.Equal(t, tc.wantTimeout, hasDeadline)
+			deadline, hasDeadline := newCtx.Deadline()
+			assert.Equal(t, tc.want != 0, hasDeadline)
+			if hasDeadline {
+				assert.WithinDuration(t, time.Now().Add(tc.want), deadline, time.Minute)
+			}
 		})
 	}
 }

act/runner/job_hooks.go

@@ -84,8 +84,7 @@ func (rc *RunContext) setupHookFileCommands(ctx context.Context, env map[string]
 	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"]
+	aliasGiteaEnv(env)
 
 	return rc.JobContainer.Copy(actPath,
 		&container.FileEntry{Name: hookEnvFileCommand, Mode: 0o666},

act/runner/job_hooks_test.go

@@ -121,6 +121,7 @@ func TestRunJobHook(t *testing.T) {
 		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"])
+		assert.Equal(t, jobContainer.env["GITHUB_PATH"], jobContainer.env["GITEA_PATH"])
 	})
 
 	t.Run("each hook has its own command state", func(t *testing.T) {

act/runner/reusable_workflow.go

@@ -23,13 +23,14 @@ func newLocalReusableWorkflowExecutor(rc *RunContext) common.Executor {
 		return common.NewErrorExecutor(err)
 	}
 
-	if !rc.Config.NoSkipCheckout {
+	preset := rc.Config.PresetGitHubContext
+	if preset == nil {
 		// resolve the local workflow against the workspace root, not the process
 		// working directory, so it is found regardless of where the runner is invoked
 		return newReusableWorkflowExecutor(rc, rc.Config.Workdir, localWorkflow.Path, false)
 	}
 
-	uses := fmt.Sprintf("%s/%s@%s", rc.Config.PresetGitHubContext.Repository, localWorkflow.Path, rc.Config.PresetGitHubContext.Sha)
+	uses := fmt.Sprintf("%s/%s@%s", preset.Repository, localWorkflow.Path, preset.Sha)
 
 	remoteReusableWorkflow, err := newRemoteReusableWorkflow(rc.Config.GitHubInstance, uses)
 	if err != nil {

act/runner/reusable_workflow_test.go

@@ -122,7 +122,7 @@ func TestNewLocalReusableWorkflowExecutorFindsSameRepositoryPaths(t *testing.T)
 
 	for _, uses := range []string{"./.gitea/workflows/reusable.yml", "$/.gitea/workflows/reusable.yml"} {
 		rc := &RunContext{
-			Config: &Config{Workdir: workdir},
+			Config: &Config{Workdir: workdir, NoSkipCheckout: true},
 			Run:    &model.Run{JobID: "job", Workflow: &model.Workflow{Jobs: map[string]*model.Job{"job": {Uses: uses}}}},
 		}
 		err := newLocalReusableWorkflowExecutor(rc)(t.Context())

act/runner/run_context.go

@@ -81,6 +81,7 @@ type RunContext struct {
 	jobRunDefaults      model.RunDefaults // defaults.run, resolved once at job setup as GitHub does
 	platformImage       string            // container.image or the runs-on pick, resolved once by isEnabled
 	jobIndex, jobTotal  int               // strategy.job-index and job-total, total 0 when unknown
+	runtimeToken        string            // ACTIONS_RUNTIME_TOKEN of the workflow run, shared with its called workflows and composite actions
 
 	jobEnv             map[string]string          // workflow and job env as evaluated for the container and service specs
 	dockerActionImages map[*model.Step]string     // Dockerfile action images built for this job, removed when it ends
@@ -193,6 +194,9 @@ func (rc *RunContext) GetEnv() map[string]string {
 				rc.Env = mergeMaps(rc.Run.Workflow.Env, job.Environment(), rc.Config.Env)
 			}
 		}
+		if rc.runtimeToken != "" {
+			rc.Env["ACTIONS_RUNTIME_TOKEN"] = rc.runtimeToken // as the daemon's Config.Env carries its token
+		}
 	}
 	if !rc.Config.DisableActEnv {
 		rc.Env["ACT"] = "true"
@@ -1598,6 +1602,23 @@ func isLocalCheckout(ghc *model.GithubContext, step *model.Step) bool {
 	return true
 }
 
+// aliasGiteaEnv mirrors the runner's GITHUB_* variables as GITEA_*, call it after the last write to them.
+func aliasGiteaEnv(env map[string]string) {
+	for _, suffix := range []string{
+		"ACTION", "ACTION_PATH", "ACTION_REF", "ACTION_REPOSITORY", "ACTIONS", "ACTOR", "ACTOR_ID", "API_URL", "BASE_REF",
+		"ENV", "EVENT_NAME", "EVENT_PATH", "GRAPHQL_URL", "HEAD_REF", "JOB", "OUTPUT", "PATH", "REF", "REF_NAME",
+		"REF_PROTECTED", "REF_TYPE", "REPOSITORY", "REPOSITORY_ID", "REPOSITORY_OWNER", "REPOSITORY_OWNER_ID",
+		"RETENTION_DAYS", "RUN_ATTEMPT", "RUN_ID", "RUN_NUMBER", "SERVER_URL", "SHA", "STATE", "STEP_SUMMARY",
+		"TRIGGERING_ACTOR", "WORKFLOW", "WORKFLOW_REF", "WORKFLOW_SHA", "WORKSPACE",
+	} {
+		if value, ok := env["GITHUB_"+suffix]; ok {
+			env["GITEA_"+suffix] = value
+		} else {
+			delete(env, "GITEA_"+suffix)
+		}
+	}
+}
+
 func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubContext, env map[string]string) {
 	if _, ok := env["CI"]; !ok {
 		env["CI"] = "true"
@@ -1650,6 +1671,7 @@ func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubCon
 
 	env["GITHUB_GRAPHQL_URL"] = ""
 	env["GITHUB_RUN_ATTEMPT"] = github.RunAttempt
+	aliasGiteaEnv(env)
 
 	env["RUNNER_NAME"] = rc.Config.RunnerName
 	env["RUNNER_ENVIRONMENT"] = "self-hosted"
@@ -1662,7 +1684,7 @@ func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubCon
 
 	if rc.Config.ArtifactServerPath != "" {
 		env["ACTIONS_RUNTIME_URL"] = cmp.Or(os.Getenv("ACTIONS_RUNTIME_URL"), "http://"+net.JoinHostPort(rc.Config.ArtifactServerAddr, rc.Config.ArtifactServerPort)+"/")
-		env["ACTIONS_RUNTIME_TOKEN"] = cmp.Or(os.Getenv("ACTIONS_RUNTIME_TOKEN"), "token")
+		env["ACTIONS_RUNTIME_TOKEN"] = cmp.Or(rc.runtimeToken, os.Getenv("ACTIONS_RUNTIME_TOKEN"), "token")
 	}
 
 	if imageOS := rc.imageOS(ctx); imageOS != "" {

act/runner/run_context_test.go

@@ -877,25 +877,25 @@ func TestGetGitHubContext(t *testing.T) {
 		RepositoryID:      "34",
 		RepositoryOwnerID: "56",
 		WorkflowRef:       "owner/repo/.gitea/workflows/test.yml@refs/heads/main",
-		WorkflowSha:       "workflow-sha",
 		RefProtected:      true,
 	}
 	ghc = rc.getGithubContext(t.Context())
 	assert.Equal(t, "preset-actor", ghc.Actor)
 	assert.Equal(t, "triggerer", ghc.TriggeringActor)
 	assert.Equal(t, "job1", ghc.Job)
-	env := map[string]string{}
+	env := map[string]string{"GITHUB_WORKFLOW_SHA": "workflow-sha"}
 	rc.withGithubEnv(t.Context(), ghc, env)
-	for name, value := range map[string]string{
-		"GITHUB_ACTOR_ID":            "12",
-		"GITHUB_TRIGGERING_ACTOR":    "triggerer",
-		"GITHUB_REPOSITORY_ID":       "34",
-		"GITHUB_REPOSITORY_OWNER_ID": "56",
-		"GITHUB_WORKFLOW_REF":        "owner/repo/.gitea/workflows/test.yml@refs/heads/main",
-		"GITHUB_WORKFLOW_SHA":        "workflow-sha",
-		"GITHUB_REF_PROTECTED":       "true",
+	for suffix, value := range map[string]string{
+		"ACTOR_ID":            "12",
+		"TRIGGERING_ACTOR":    "triggerer",
+		"REPOSITORY_ID":       "34",
+		"REPOSITORY_OWNER_ID": "56",
+		"WORKFLOW_REF":        "owner/repo/.gitea/workflows/test.yml@refs/heads/main",
+		"WORKFLOW_SHA":        "workflow-sha",
+		"REF_PROTECTED":       "true",
 	} {
-		assert.Equal(t, value, env[name], name)
+		assert.Equal(t, value, env["GITHUB_"+suffix], suffix)
+		assert.Equal(t, value, env["GITEA_"+suffix], suffix)
 	}
 	ghc.RefProtected = false
 	rc.withGithubEnv(t.Context(), ghc, env)
@@ -922,12 +922,12 @@ func TestGetGitHubContext(t *testing.T) {
 			github := rc.getGithubContext(t.Context())
 			assert.Equal(t, testcase.serverURL, github.ServerURL)
 			assert.Equal(t, testcase.apiURL, github.APIURL)
-			env := map[string]string{}
+			env := map[string]string{"GITEA_SERVER_URL": "stale", "GITEA_API_URL": "stale"}
 			rc.withGithubEnv(t.Context(), github, env)
 			_, exported := env["GITHUB_SERVER_URL"]
 			assert.Equal(t, testcase.serverURL != "", exported)
-			assert.Equal(t, testcase.serverURL, env["GITHUB_SERVER_URL"])
-			assert.Equal(t, testcase.apiURL, env["GITHUB_API_URL"])
+			assert.Equal(t, testcase.serverURL, env["GITEA_SERVER_URL"])
+			assert.Equal(t, testcase.apiURL, env["GITEA_API_URL"])
 		})
 	}
 }
@@ -1631,4 +1631,8 @@ func TestRunContextWithGithubEnvRunnerValues(t *testing.T) {
 		rc.withGithubEnv(ctx, &model.GithubContext{}, env)
 		assert.Equal(t, ci, env["CI"])
 	}
+
+	rc.runtimeToken = "run-token"
+	newTestCompositeRunContext(t, rc).withGithubEnv(ctx, &model.GithubContext{}, env)
+	assert.Equal(t, "run-token", env["ACTIONS_RUNTIME_TOKEN"])
 }

act/runner/runner.go

@@ -41,6 +41,7 @@ type Config struct {
 	Env                           map[string]string                             // env for containers
 	Secrets                       map[string]string                             // list of secrets
 	ExtraMasks                    []string                                      // values to hide that are not in Secrets, such as the proxy password
+	RuntimeTokens                 map[*model.Workflow]string                    // ACTIONS_RUNTIME_TOKEN per workflow run, as each is its own artifact run
 	Vars                          map[string]string                             // list of vars
 	Token                         string                                        // GitHub token
 	InsecureSecrets               bool                                          // switch hiding output when printing to terminal
@@ -355,6 +356,11 @@ func (runner *runnerImpl) newCombinationRunContext(ctx context.Context, run *mod
 		caller:      runner.caller,
 		jobIndex:    index,
 		jobTotal:    total,
+
+		runtimeToken: runner.config.RuntimeTokens[run.Workflow],
+	}
+	if runner.caller != nil {
+		rc.runtimeToken = runner.caller.runContext.runtimeToken
 	}
 	if err := rc.resolveWorkflowCall(ctx); err != nil {
 		return nil, err

act/runner/step.go

@@ -27,12 +27,24 @@ type step interface {
 	post() common.Executor
 
 	getRunContext() *RunContext
-	getGithubContext(ctx context.Context) *model.GithubContext
 	getStepModel() *model.Step
 	getEnv() *map[string]string
 	getIfExpression(context context.Context, stage stepStage) string
 }
 
+func stepActionIdentity(step step) (repository, ref string) {
+	if action, ok := step.(interface{ actionIdentity() (string, string) }); ok {
+		return action.actionIdentity()
+	}
+	return "", ""
+}
+
+func getStepGithubContext(ctx context.Context, step step) *model.GithubContext {
+	github := step.getRunContext().getGithubContext(ctx)
+	github.ActionRepository, github.ActionRef = stepActionIdentity(step)
+	return github
+}
+
 type stepStage int
 
 const (
@@ -92,6 +104,8 @@ func runStepExecutor(step step, stage stepStage, executor common.Executor) commo
 			runStep, err = isStepEnabled(ctx, ifExpression, step, stage)
 		}
 		if err == nil && runStep {
+			env := *step.getEnv()
+			env["GITHUB_ACTION_REPOSITORY"], env["GITHUB_ACTION_REF"] = stepActionIdentity(step)
 			err = setupInputs(ctx, step)
 		}
 		if err != nil {
@@ -143,15 +157,7 @@ func runStepExecutor(step step, stage stepStage, executor common.Executor) commo
 		stepSummaryIndex := topRC.CurrentStepIndex
 		summaryFileCommand := path.Join("workflow", "step-summary-"+strconv.Itoa(stepSummaryIndex)+".md")
 		(*step.getEnv())["GITHUB_STEP_SUMMARY"] = path.Join(actPath, summaryFileCommand)
-
-		{
-			// For Gitea
-			(*step.getEnv())["GITEA_OUTPUT"] = (*step.getEnv())["GITHUB_OUTPUT"]
-			(*step.getEnv())["GITEA_STATE"] = (*step.getEnv())["GITHUB_STATE"]
-			(*step.getEnv())["GITEA_PATH"] = (*step.getEnv())["GITHUB_PATH"]
-			(*step.getEnv())["GITEA_ENV"] = (*step.getEnv())["GITHUB_ENV"]
-			(*step.getEnv())["GITEA_STEP_SUMMARY"] = (*step.getEnv())["GITHUB_STEP_SUMMARY"]
-		}
+		aliasGiteaEnv(*step.getEnv())
 
 		// Reset the per-phase file-command files. GITHUB_STEP_SUMMARY is intentionally
 		// excluded here and initialized below at most once per step so writes from later
@@ -253,7 +259,7 @@ func setupEnv(ctx context.Context, step step) error {
 	env := step.getEnv()
 	// container env is the image's baseline, which job env and $GITHUB_ENV override
 	mergeIntoMap(step, env, rc.containerSpec.Env, rc.GetEnv())
-	rc.withGithubEnv(ctx, step.getGithubContext(ctx), *env)
+	rc.withGithubEnv(ctx, getStepGithubContext(ctx, step), *env)
 
 	var err error
 	exprEval := rc.NewExpressionEvaluator(ctx)
@@ -302,7 +308,7 @@ func isStepEnabled(ctx context.Context, expr string, step step, stage stepStage)
 	if rc.Parent != nil && stage == stepStageMain && jobContext.Status != "cancelled" {
 		jobContext.Status = rc.ownStatus()
 	}
-	runStep, err := EvalBool(ctx, rc.newStepExpressionEvaluator(ctx, step, rc.actionInputs, jobContext), expr, defaultStatusCheck)
+	runStep, err := EvalBool(ctx, rc.newStepExpressionEvaluator(ctx, step, rc.actionInputs, jobContext, rc.getGithubContext(ctx)), expr, defaultStatusCheck)
 	if err != nil {
 		return false, fmt.Errorf("if-expression %q evaluation failed: %s", expr, err)
 	}

act/runner/step_action_builtin.go

@@ -39,7 +39,7 @@ func (sab *stepActionBuiltin) main() common.Executor {
 		rc.ApplyExtraPath(ctx, &sab.env)
 		return sab.run(ctx, &action.Context{
 			Container:       rc.JobContainer,
-			Github:          rc.getGithubContext(ctx),
+			Github:          getStepGithubContext(ctx, sab),
 			Inputs:          sab.Step.With,
 			HostWorkdir:     rc.Config.Workdir,
 			Workspace:       rc.JobContainer.ToContainerPath(rc.Config.Workdir),
@@ -58,10 +58,6 @@ func (sab *stepActionBuiltin) post() common.Executor { return common.NewPipeline
 
 func (sab *stepActionBuiltin) getRunContext() *RunContext { return sab.RunContext }
 
-func (sab *stepActionBuiltin) getGithubContext(ctx context.Context) *model.GithubContext {
-	return sab.RunContext.getGithubContext(ctx)
-}
-
 func (sab *stepActionBuiltin) getStepModel() *model.Step { return sab.Step }
 
 func (sab *stepActionBuiltin) getEnv() *map[string]string { return &sab.env }

act/runner/step_action_local.go

@@ -95,10 +95,6 @@ func (sal *stepActionLocal) getRunContext() *RunContext {
 	return sal.RunContext
 }
 
-func (sal *stepActionLocal) getGithubContext(ctx context.Context) *model.GithubContext {
-	return sal.getRunContext().getGithubContext(ctx)
-}
-
 func (sal *stepActionLocal) getStepModel() *model.Step {
 	return sal.Step
 }

act/runner/step_action_local_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
+	"go.yaml.in/yaml/v4"
 )
 
 type stepActionMocks struct {
@@ -53,7 +54,7 @@ func TestStepActionLocalTest(t *testing.T) {
 		readAction: salm.readAction,
 		runAction:  salm.runAction,
 		RunContext: &RunContext{
-			StepResults: map[string]*model.StepResult{},
+			StepResults: map[string]*model.StepResult{"previous": {Outputs: map[string]string{"value": "previous"}}},
 			ExprEval:    &expressionEvaluator{},
 			Config: &Config{
 				Workdir: "/tmp",
@@ -68,25 +69,42 @@ func TestStepActionLocalTest(t *testing.T) {
 				},
 			},
 			JobContainer: cm,
+			Env:          map[string]string{"GITHUB_ACTION_REPOSITORY": "other/action", "GITHUB_ACTION_REF": "v1"},
+			Matrix:       map[string]any{"value": "matrix"},
+			actionInputs: map[string]any{"shared": "input"},
 		},
 		Step: &model.Step{
 			ID:   "1",
 			Uses: "./path/to/action",
+			If: yaml.Node{Value: "github.action_repository == 'other/action' && github.action_ref == 'v1' && " +
+				"env.STEP_VALUE == 'step' && env.GITHUB_ACTION_REPOSITORY == 'forged/repo' && env.GITHUB_ACTION_REF == 'forged-ref' && " +
+				"steps.previous.outputs.value == 'previous' && inputs.shared == 'input' && matrix.value == 'matrix'"},
 		},
 	}
+	require.NoError(t, sal.Step.Env.Encode(map[string]string{"STEP_VALUE": "step", "GITHUB_ACTION_REPOSITORY": "forged/repo", "GITHUB_ACTION_REF": "forged-ref"}))
+	require.NoError(t, sal.Step.RawWith.Encode(map[string]string{"identity": "${{ github.action_repository }}|${{ github.action_ref }}"}))
 
 	salm.On("readAction", sal.Step, filepath.Clean("/tmp/path/to/action"), "", mock.Anything, mock.Anything).
 		Return(&model.Action{}, nil)
 
 	expectStepFileCommands(t, cm)
 
-	salm.On("runAction", sal, filepath.Clean("/tmp/path/to/action"), (*remoteAction)(nil)).Return(noopExecutor)
+	salm.On("runAction", sal, filepath.Clean("/tmp/path/to/action"), (*remoteAction)(nil)).Return(func(ctx context.Context) error {
+		sal.RunContext.setOutput(ctx, map[string]string{"name": "value"}, "ran")
+		return nil
+	})
 
 	err := sal.pre()(ctx)
 	require.NoError(t, err)
 
 	err = sal.main()(ctx)
 	require.NoError(t, err)
+	assert.Empty(t, sal.env["GITHUB_ACTION_REPOSITORY"])
+	assert.Empty(t, sal.env["GITHUB_ACTION_REF"])
+	assert.Equal(t, "|", sal.Step.With["identity"])
+	assert.Equal(t, "ran", sal.RunContext.StepResults["1"].Outputs["value"])
+	assert.Equal(t, "other/action", sal.RunContext.Env["GITHUB_ACTION_REPOSITORY"])
+	assert.Equal(t, "v1", sal.RunContext.Env["GITHUB_ACTION_REF"])
 
 	cm.AssertExpectations(t)
 	salm.AssertExpectations(t)

act/runner/step_action_remote.go

@@ -75,7 +75,7 @@ func (sar *stepActionRemote) prepareActionExecutor() common.Executor {
 		}
 		sar.Step.Uses = uses
 
-		github := sar.getGithubContext(ctx) // read before remoteAction is set, so `$/` resolves against the enclosing action
+		github := sar.RunContext.getGithubContext(ctx)
 		if sar.remoteAction, err = newRemoteAction(sar.Step.Uses, github, sar.RunContext.Config.GitHubInstance); err != nil {
 			return err
 		}
@@ -153,7 +153,7 @@ func (sar *stepActionRemote) main() common.Executor {
 	return common.NewPipelineExecutor(
 		sar.prepareActionExecutor(),
 		runStepExecutor(sar, stepStageMain, func(ctx context.Context) error {
-			github := sar.getGithubContext(ctx)
+			github := getStepGithubContext(ctx, sar)
 			if sar.skipsLocalCheckout(sar.remoteAction, github) {
 				printRunActionHeader(ctx, sar.Step, nil, sar.env, sar.RunContext)
 				if sar.RunContext.Config.BindWorkdir {
@@ -181,17 +181,11 @@ func (sar *stepActionRemote) getRunContext() *RunContext {
 	return sar.RunContext
 }
 
-func (sar *stepActionRemote) getGithubContext(ctx context.Context) *model.GithubContext {
-	ghc := sar.getRunContext().getGithubContext(ctx)
-
-	// extend github context if we already have an initialized remoteAction
-	remoteAction := sar.remoteAction
-	if remoteAction != nil {
-		ghc.ActionRepository = fmt.Sprintf("%s/%s", remoteAction.Org, remoteAction.Repo)
-		ghc.ActionRef = remoteAction.Ref
+func (sar *stepActionRemote) actionIdentity() (string, string) {
+	if sar.remoteAction == nil {
+		return "", ""
 	}
-
-	return ghc
+	return sar.remoteAction.Org + "/" + sar.remoteAction.Repo, sar.remoteAction.Ref
 }
 
 func (sar *stepActionRemote) getStepModel() *model.Step {
@@ -205,7 +199,7 @@ func (sar *stepActionRemote) getEnv() *map[string]string {
 func (sar *stepActionRemote) getIfExpression(ctx context.Context, stage stepStage) string {
 	switch stage {
 	case stepStagePre:
-		github := sar.getGithubContext(ctx)
+		github := getStepGithubContext(ctx, sar)
 		if sar.skipsLocalCheckout(sar.remoteAction, github) {
 			// skip local checkout pre step
 			return "false"

act/runner/step_action_remote_test.go

@@ -76,7 +76,7 @@ func TestStepActionRemote(t *testing.T) {
 		status          model.StepStatus
 		runError        error
 	}{
-		{name: "run-successful", status: model.StepStatusSuccess},
+		{name: "run-successful", condition: "github.action_repository == 'other/composite' && github.action_ref == 'v2'", status: model.StepStatusSuccess},
 		{name: "run-skipped", condition: "false", status: model.StepStatusSkipped},
 		{name: "run-error", status: model.StepStatusFailure, runError: assert.AnError},
 	} {
@@ -110,6 +110,7 @@ func TestStepActionRemote(t *testing.T) {
 					},
 					StepResults:  map[string]*model.StepResult{},
 					JobContainer: cm,
+					Env:          map[string]string{"GITHUB_ACTION_REPOSITORY": "other/composite", "GITHUB_ACTION_REF": "v2"},
 				},
 				Step:       &model.Step{ID: "step", Uses: "remote/action@v1", If: yaml.Node{Value: tt.condition}},
 				readAction: sarm.readAction,
@@ -127,6 +128,8 @@ func TestStepActionRemote(t *testing.T) {
 			require.NoError(t, sar.pre()(ctx))
 			assert.Equal(t, tt.runError, sar.main()(ctx))
 			assert.True(t, clonedAction)
+			assert.Equal(t, "remote/action", sar.env["GITHUB_ACTION_REPOSITORY"])
+			assert.Equal(t, "v1", sar.env["GITHUB_ACTION_REF"])
 			assert.Equal(t, &model.StepResult{Conclusion: tt.status, Outcome: tt.status, Outputs: map[string]string{}}, sar.RunContext.StepResults["step"])
 
 			sarm.AssertExpectations(t)
@@ -182,7 +185,7 @@ func TestStepActionRemotePrepare(t *testing.T) {
 	require.NoError(t, err)
 	root, err := prepare(job, "org/repo@v1")
 	require.NoError(t, err)
-	nested, err := prepare(&RunContext{Config: job.Config, Run: job.Run, JobContainer: job.JobContainer, Parent: job}, "org/repo/save@v1")
+	nested, err := prepare(&RunContext{Config: job.Config, Run: job.Run, JobContainer: job.JobContainer, Parent: job, Env: map[string]string{"GITHUB_ACTION_REPOSITORY": "org/repo", "GITHUB_ACTION_REF": "v1"}}, "$/save")
 	require.NoError(t, err)
 	other, err := prepare(job, "org/repo@v2")
 	require.NoError(t, err)
@@ -346,9 +349,6 @@ func Test_newRemoteActionSelfRepo(t *testing.T) {
 			},
 		},
 		{name: "unknown instance", action: "$/.gitea/actions/build", github: &model.GithubContext{Repository: "owner/workflow-repo", Sha: "abc123"}},
-		{name: "empty path", action: "$/", github: workflow},
-		{name: "ref suffix is not allowed", action: "$/.gitea/actions/build@v1", github: workflow},
-		{name: "path traversal", action: "$/../escape", github: workflow},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

act/runner/step_docker.go

@@ -35,10 +35,6 @@ func (sd *stepDocker) getRunContext() *RunContext {
 	return sd.RunContext
 }
 
-func (sd *stepDocker) getGithubContext(ctx context.Context) *model.GithubContext {
-	return sd.getRunContext().getGithubContext(ctx)
-}
-
 func (sd *stepDocker) getStepModel() *model.Step {
 	return sd.Step
 }

act/runner/step_docker_test.go

@@ -14,6 +14,7 @@ import (
 	"gitea.dev/actionslib/pkg/model"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.yaml.in/yaml/v4"
 )
 
 func TestStepDockerMain(t *testing.T) {
@@ -57,13 +58,16 @@ func TestStepDockerMain(t *testing.T) {
 				},
 			},
 			JobContainer: cm,
+			Env:          map[string]string{"GITHUB_ACTION_REPOSITORY": "other/composite", "GITHUB_ACTION_REF": "v1"},
 		},
 		Step: &model.Step{
 			ID:               "1",
 			Uses:             "docker://node:14",
 			WorkingDirectory: "workdir",
+			If:               yaml.Node{Value: "github.action_repository == 'other/composite' && github.action_ref == 'v1'"},
 		},
 	}
+	require.NoError(t, sd.Step.RawWith.Encode(map[string]string{"args": "identity:${{ github.action_repository }}:${{ github.action_ref }}"}))
 	sd.RunContext.ExprEval = sd.RunContext.NewExpressionEvaluator(ctx)
 
 	cm.On("Pull", false).Return(noopExecutor)
@@ -80,6 +84,11 @@ func TestStepDockerMain(t *testing.T) {
 	require.NoError(t, sd.main()(ctx))
 
 	assert.Equal(t, "node:14", input.Image)
+	assert.Equal(t, []string{"identity::"}, input.Cmd)
+	assert.Contains(t, input.Env, "GITHUB_ACTION_REPOSITORY=")
+	assert.Contains(t, input.Env, "GITHUB_ACTION_REF=")
+	assert.Equal(t, "other/composite", sd.RunContext.Env["GITHUB_ACTION_REPOSITORY"])
+	assert.Equal(t, "v1", sd.RunContext.Env["GITHUB_ACTION_REF"])
 
 	assert.Empty(t, input.Username)
 	assert.Empty(t, input.Password)

act/runner/step_run.go

@@ -222,10 +222,6 @@ func (sr *stepRun) getRunContext() *RunContext {
 	return sr.RunContext
 }
 
-func (sr *stepRun) getGithubContext(ctx context.Context) *model.GithubContext {
-	return sr.getRunContext().getGithubContext(ctx)
-}
-
 func (sr *stepRun) getStepModel() *model.Step {
 	return sr.Step
 }

act/runner/step_run_test.go

@@ -19,6 +19,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
+	"go.yaml.in/yaml/v4"
 )
 
 type shellContainerMock struct{ *containerMock }
@@ -36,7 +37,6 @@ func TestStepRun(t *testing.T) {
 	sr := &stepRun{
 		RunContext: &RunContext{
 			StepResults: map[string]*model.StepResult{},
-			ExprEval:    &expressionEvaluator{},
 			Config:      &Config{Env: testCheckoutEnv()},
 			Run: &model.Run{
 				JobID: "1",
@@ -48,19 +48,33 @@ func TestStepRun(t *testing.T) {
 			},
 			JobContainer:   cm,
 			jobRunDefaults: model.RunDefaults{Shell: "bash"},
+			Env:            map[string]string{"GITHUB_ACTION_REPOSITORY": "other/composite", "GITHUB_ACTION_REF": "v1"},
 		},
 		Step: &model.Step{
 			ID:               "1",
-			Run:              "cmd",
+			Run:              "cmd${{ github.action_repository }}${{ github.action_ref }}",
 			WorkingDirectory: "workdir",
+			If:               yaml.Node{Value: "github.action_repository == 'other/composite' && github.action_ref == 'v1'"},
 		},
 	}
+	sr.RunContext.ExprEval = sr.RunContext.NewExpressionEvaluator(t.Context())
+	require.NoError(t, sr.Step.Env.Encode(map[string]string{
+		"GITHUB_ACTION_REPOSITORY": "forged/repo", "GITHUB_ACTION_REF": "forged-ref",
+		"GITEA_ACTION_REPOSITORY": "forged/repo", "GITEA_ACTION_REF": "forged-ref",
+	}))
 
 	cm.On("Copy", "/var/run/act", []*container.FileEntry{fileEntry}).Return(noopExecutor)
 	cm.On("Exec", []string{"bash", "--noprofile", "--norc", "-e", "-o", "pipefail", "/var/run/act/workflow/1.sh"}, mock.AnythingOfType("map[string]string"), "", "workdir").Return(noopExecutor)
 
 	expectStepFileCommands(t, cm)
 	require.NoError(t, sr.main()(t.Context()))
+	assert.Empty(t, sr.env["GITHUB_ACTION_REPOSITORY"])
+	assert.Empty(t, sr.env["GITHUB_ACTION_REF"])
+	assert.Empty(t, sr.env["GITEA_ACTION_REPOSITORY"])
+	assert.Empty(t, sr.env["GITEA_ACTION_REF"])
+	assert.Equal(t, sr.env["GITHUB_STEP_SUMMARY"], sr.env["GITEA_STEP_SUMMARY"])
+	assert.Equal(t, "other/composite", sr.RunContext.Env["GITHUB_ACTION_REPOSITORY"])
+	assert.Equal(t, "v1", sr.RunContext.Env["GITHUB_ACTION_REF"])
 
 	cm.AssertExpectations(t)
 }

act/runner/step_test.go

@@ -155,18 +155,14 @@ func TestSetupEnv(t *testing.T) {
 	require.NoError(t, setupEnv(t.Context(), testStep))
 	require.NoError(t, setupInputs(t.Context(), testStep))
 
-	delete(env, "GITHUB_REF")
-	delete(env, "GITHUB_REF_NAME")
-	delete(env, "GITHUB_REF_TYPE")
-	delete(env, "GITHUB_SHA")
-	delete(env, "GITHUB_WORKSPACE")
-	delete(env, "GITHUB_REPOSITORY")
-	delete(env, "GITHUB_REPOSITORY_OWNER")
-	delete(env, "GITHUB_ACTOR")
+	for _, suffix := range []string{"REF", "REF_NAME", "REF_TYPE", "SHA", "WORKSPACE", "REPOSITORY", "REPOSITORY_OWNER", "ACTOR"} {
+		delete(env, "GITHUB_"+suffix)
+		delete(env, "GITEA_"+suffix)
+	}
 	delete(env, "RUNNER_NAME")
 	delete(env, "RUNNER_WORKSPACE")
 
-	assert.Equal(t, map[string]string{
+	expected := map[string]string{
 		"ACT":                      "true",
 		"ACT_SKIP_CHECKOUT":        "true",
 		"CI":                       "true",
@@ -193,7 +189,13 @@ func TestSetupEnv(t *testing.T) {
 		"RUNNER_ENVIRONMENT":       "self-hosted",
 		"RUNNER_PERFLOG":           "/dev/null",
 		"RUNNER_TRACKING_ID":       "",
-	}, env)
+	}
+	for name, value := range expected {
+		if suffix, ok := strings.CutPrefix(name, "GITHUB_"); ok {
+			expected["GITEA_"+suffix] = value
+		}
+	}
+	assert.Equal(t, expected, env)
 
 	for _, expression := range []string{"inputs.args", "env.ARGS"} {
 		t.Run("deferred inputs from "+expression, func(t *testing.T) {

act/runner/testdata/actions/docker-local-noargs/Dockerfile

@@ -1,5 +1,5 @@
 # Container image that runs your code
-FROM node:24-bookworm-slim
+FROM node:26-bookworm-slim
 
 # Copies your code file from your action repository to the filesystem path `/` of the container
 COPY entrypoint.sh /entrypoint.sh

act/runner/testdata/actions/docker-local/Dockerfile

@@ -1,5 +1,5 @@
 # Container image that runs your code
-FROM node:24-bookworm-slim
+FROM node:26-bookworm-slim
 
 # Copies your code file from your action repository to the filesystem path `/` of the container
 COPY entrypoint.sh /entrypoint.sh

act/runner/testdata/actions/docker-url/action.yml

@@ -8,7 +8,7 @@ inputs:
     default: World
 runs:
   using: docker
-  image: docker://node:24-bookworm-slim
+  image: docker://node:26-bookworm-slim
   entrypoint: /bin/sh -c
   env:
     TEST: enabled

docs/job-hooks.md

@@ -45,7 +45,7 @@ A hook path that does not exist inside the job environment fails the job with `N
 
 ## Environment
 
-A hook sees the job's environment: the workflow, job and `container:` `env:`, the runner's `envs`, and the `GITHUB_*` context variables, with the same masking applied to its output as to a step's. The step-specific ones (`GITHUB_ACTION`, `GITHUB_OUTPUT`, `GITHUB_STATE`) are not set — a hook is not a step, so `::save-state::` and `::set-output::` have nowhere to go.
+A hook sees the job's environment: the workflow, job and `container:` `env:`, the runner's `envs`, and the `GITHUB_*`/`GITEA_*` context variables, with the same masking applied to its output as to a step's. The step-specific ones (`GITHUB_ACTION`, `GITHUB_OUTPUT`, `GITHUB_STATE`) are not set — a hook is not a step, so `::save-state::` and `::set-output::` have nowhere to go.
 
 Its stdout is part of the job log, after a collapsible group naming the hook and its shell, and is scanned for workflow commands. `::add-mask::` registers a value to be masked for the rest of the job. `::set-env::` and `::add-path::` apply to the steps that follow, but as in a step they need `ACTIONS_ALLOW_UNSECURE_COMMANDS: true`, and a refused one fails the hook.
 

docs/kubernetes.md

@@ -49,6 +49,60 @@ A job with `runs-on: [linux, gpu]` gets the `linux` and then the `gpu` entry of
 
 Job pods mount no service account token unless the template sets `automountServiceAccountToken: true`. Job pods and their Secrets are labeled `app.kubernetes.io/managed-by: gitea-runner` and `com.gitea.runner.uuid: <runner UUID>`. The idle cleanup removes those the runner did not get to remove, once they are older than `runner.workdir_cleanup_age`.
 
+## Copying files over the pod network
+
+The runner copies files into the job container, such as the actions a step uses, with `tar` over `pods/exec`. That data goes through the API server, which on a managed cluster often sits in other zones than the nodes, so each byte can cross zones twice. With `transfer.mode` set to `auto` or `direct`, the job container instead fetches directories, such as actions and workspaces, and other copies of 64 KiB or more gzipped from the runner pod. Smaller ones, like step scripts, stay on `pods/exec`, as do copies out of the job container and step output.
+
+```yaml
+kubernetes:
+  transfer:
+    mode: direct # api (default), auto or direct
+    host: "" # address the runner listens on and job pods reach it at, defaults to its outbound IP, the pod IP in a cluster
+    port: 0 # port it listens on, defaults to a free one
+    image: "" # image with gitea-runner on its PATH, defaults to the image of a single-container runner pod in kubernetes.namespace
+```
+
+Each job pod then gets an init container named `gitea-runner-transfer` from `image`, which copies its `gitea-runner` into the `act` volume for the job container to fetch with over HTTPS. The modes differ in what happens when a job pod cannot reach the runner, for example because of a NetworkPolicy, or when no `image` is set and the runner is not a single-container pod in `kubernetes.namespace`:
+
+| Mode | Copies | When the pod network does not work |
+|---|---|---|
+| `api` | through the API server | not used |
+| `auto` | over the pod network | the job pod gets its copies through the API server, after one failed attempt, and a warning is logged |
+| `direct` | over the pod network | the job fails, so a broken setup shows instead of quietly costing API server traffic again |
+
+In both `auto` and `direct`, a job fails when its init container does, for example when `image` cannot be pulled or has no `gitea-runner` on its PATH. A private `image` needs `imagePullSecrets` in `pod_template`, and a versioned tag keeps job pods on the runner's version. An `initContainers` entry named `gitea-runner-transfer` in `pod_template` merges into the init container, for example to set its `resources`.
+
+The copies include secrets, such as `run` scripts with `${{ secrets.* }}` expanded, SSH keys for checkout and the runner's client key, so a runner only serves them to its own job pods:
+
+- The runner listens with a certificate it generates at start. Its SHA-256 pin reaches the job pod over the `pods/exec` stream, which the API server protects with TLS, and the job pod trusts no other certificate, so nobody on the pod network can read or change a copy.
+- Every copy has a one-time token, sent on that stream's stdin, so it shows neither in the command line nor in the API server audit log.
+- The runner serves a copy only to a connection from an IP of the job pod it is for. Other pods get a 404 and leave the copy for its job pod. This needs the runner to see the job pods' own addresses, so it does not work for a runner outside the cluster or behind a proxy that rewrites source addresses.
+
+To also keep other pods from connecting at all, allow the port only from the runner's own job pods, which carry its UUID in the `com.gitea.runner.uuid` label. The policy denies every other connection to the runner pod, so it also needs to allow `cache.port`, and both ports need fixed values:
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: gitea-runner-transfer
+spec:
+  podSelector:
+    matchLabels:
+      app: runner # the runner pod
+  policyTypes: [Ingress]
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: <kubernetes.namespace>
+          podSelector:
+            matchLabels:
+              com.gitea.runner.uuid: <runner UUID, from the .runner file>
+      ports:
+        - port: 9090 # kubernetes.transfer.port
+        - port: 9091 # cache.port
+```
+
 ## Services
 
 Services share the pod's network, so a step reaches one by its id or `localhost`, and two services cannot listen on the same port. An id that is not a valid hostname is sanitized, so `my_db` is reached as `my-db`. Pass secrets to services through `env`, as `command` is visible in the pod spec. Of `options`, only `--health-*` is supported. They become a startup probe with Docker's defaults, which stops a service that fails its retries, so the job fails as on Docker.

e2e/cancel_test.go

@@ -28,7 +28,7 @@ func testRunCancellation(t *testing.T) {
 	pushWorkflow(t, api, repo, "cancel.yml")
 
 	wfRun := waitForRun(t, api, repo)
-	waitForRunningJobLog(t, api, repo, wfRun.ID, "e2e-live-log-marker")
+	waitForRunningJobLog(t, api, repo, wfRun.ID, "e2e-live-log-marker", 1)
 	if !cancelSupported {
 		requireSuccess(t, api, repo, wfRun.ID)
 		return
@@ -49,31 +49,32 @@ func testRunCancellation(t *testing.T) {
 	}
 }
 
-func waitForRunningJobLog(t *testing.T, api *GiteaAPI, repo string, runID int64, substr string) {
+func waitForRunningJobLog(t *testing.T, api *GiteaAPI, repo string, runID int64, prefix string, count int) {
 	t.Helper()
 	// The budget covers scheduling and the container start, which a loaded runner makes slow.
 	ctx, cancel := context.WithTimeout(t.Context(), runTimeout)
 	defer cancel()
 
-	status := "none"
 	for {
 		jobs, err := api.Jobs(ctx, repo, runID)
 		if err != nil {
 			t.Fatalf("list jobs: %v", err)
 		}
-		if len(jobs) > 0 {
-			status = jobs[0].Status
-			if status == "in_progress" {
-				logs, err := api.JobLogs(ctx, repo, jobs[0].ID)
-				if err == nil && commandRow(logs, substr) == substr {
-					return
+		logged := 0
+		for _, job := range jobs {
+			if job.Status == "in_progress" {
+				if logs, err := api.JobLogs(ctx, repo, job.ID); err == nil && commandRow(logs, prefix) != "" {
+					logged++
 				}
 			}
 		}
+		if logged >= count {
+			return
+		}
 		select {
 		case <-ctx.Done():
 			dumpRunLogs(t, api, repo, runID)
-			t.Fatalf("job of run %d is %q and never logged %q", runID, status, substr)
+			t.Fatalf("%d of %d running jobs of run %d logged %q", logged, count, runID, prefix)
 		case <-time.After(pollInterval):
 		}
 	}

e2e/cli_test.go

@@ -0,0 +1,321 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"slices"
+	"strings"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+)
+
+type syncBuffer struct {
+	mu  sync.Mutex
+	buf bytes.Buffer
+}
+
+func (b *syncBuffer) Write(p []byte) (int, error) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	return b.buf.Write(p)
+}
+
+func (b *syncBuffer) String() string {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	return b.buf.String()
+}
+
+type cliRunner struct {
+	api     *GiteaAPI
+	repo    string
+	bin     string
+	cfgFile string
+	dir     string
+}
+
+// newCLIRunner registers the built binary against a fresh repo with a single docker label.
+func newCLIRunner(t *testing.T, label, extraRunnerConfig string) *cliRunner {
+	t.Helper()
+	api, repo := newScenario(t)
+	token, err := fixture.RegistrationToken(t.Context(), repo)
+	if err != nil {
+		t.Fatalf("get registration token: %v", err)
+	}
+
+	dir := t.TempDir()
+	bin, err := runnerBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cfg := fmt.Sprintf(`runner:
+  file: %s
+  fetch_interval: 250ms
+  fetch_interval_max: 250ms
+  state_report_interval: 500ms
+  log_report_interval: 500ms
+%scache:
+  dir: %s
+container:
+  network: %s
+`, filepath.Join(dir, ".runner"), extraRunnerConfig, filepath.Join(dir, "cache"), fixture.network)
+	c := &cliRunner{api: api, repo: repo, bin: bin, cfgFile: filepath.Join(dir, "config.yaml"), dir: dir}
+	if err := os.WriteFile(c.cfgFile, []byte(cfg), 0o600); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+
+	out, err := exec.CommandContext(t.Context(), c.bin, "register", "--no-interactive", "-c", c.cfgFile,
+		"--instance", fixture.baseURL, "--token", token, "--name", repo,
+		"--labels", label+":docker://"+os.Getenv("E2E_JOB_IMAGE")).CombinedOutput()
+	if err != nil {
+		t.Fatalf("register: %v\n%s", err, out)
+	}
+	if _, err := os.Stat(filepath.Join(dir, ".runner")); err != nil {
+		t.Fatalf("register did not write the runner file: %v\n%s", err, out)
+	}
+	return c
+}
+
+type cliDaemon struct {
+	cmd    *exec.Cmd
+	log    *syncBuffer
+	exited chan error
+}
+
+func (c *cliRunner) startDaemon(t *testing.T, args ...string) *cliDaemon {
+	t.Helper()
+	d := &cliDaemon{log: &syncBuffer{}, exited: make(chan error, 1)}
+	d.cmd = exec.Command(c.bin, append([]string{"daemon", "-c", c.cfgFile}, args...)...)
+	d.cmd.Stdout, d.cmd.Stderr = d.log, d.log
+	if err := d.cmd.Start(); err != nil {
+		t.Fatalf("start daemon: %v", err)
+	}
+	go func() { d.exited <- d.cmd.Wait() }()
+	t.Cleanup(func() {
+		_ = d.cmd.Process.Kill() // no-op once the daemon has exited
+	})
+	return d
+}
+
+// wait returns the daemon's exit error, failing the test when it is still running after timeout.
+func (d *cliDaemon) wait(t *testing.T, timeout time.Duration) error {
+	t.Helper()
+	select {
+	case err := <-d.exited:
+		return err
+	case <-time.After(timeout):
+		t.Fatalf("daemon still running after %s\n%s", timeout, d.log)
+		return nil
+	}
+}
+
+func (d *cliDaemon) terminate(t *testing.T) {
+	t.Helper()
+	if err := d.cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("signal daemon: %v", err)
+	}
+}
+
+// requireSuccess waits for the run and dumps the daemon output next to the job logs on failure.
+func (d *cliDaemon) requireSuccess(t *testing.T, c *cliRunner, runID int64) {
+	t.Helper()
+	completed, err := c.api.WaitForRunConclusion(t.Context(), c.repo, runID, runTimeout)
+	if err != nil || completed.Conclusion != "success" {
+		t.Logf("daemon output:\n%s", d.log)
+		requireSuccess(t, c.api, c.repo, runID)
+	}
+}
+
+// testCLIRegisterDaemon drives the built binary the way a user does: register, then daemon.
+func testCLIRegisterDaemon(t *testing.T) {
+	t.Parallel()
+	c := newCLIRunner(t, "e2e-cli", "")
+	d := c.startDaemon(t)
+
+	pushWorkflow(t, c.api, c.repo, "cli.yml")
+	wfRun := waitForRun(t, c.api, c.repo)
+	d.requireSuccess(t, c, wfRun.ID)
+	if logs := runLogs(t, c.api, c.repo, wfRun.ID); commandRow(logs, "e2e-cli-job-ran") == "" {
+		t.Errorf("job logs are missing the marker:\n%s", logs)
+	}
+
+	d.terminate(t)
+	if err := d.wait(t, 30*time.Second); err != nil {
+		t.Errorf("daemon did not exit cleanly on SIGTERM: %v\n%s", err, d.log)
+	}
+}
+
+// testCLIOnce checks that --once takes a single job and then exits on its own.
+func testCLIOnce(t *testing.T) {
+	t.Parallel()
+	c := newCLIRunner(t, "e2e-once", "")
+	d := c.startDaemon(t, "--once")
+
+	pushWorkflow(t, c.api, c.repo, "cli_once.yml")
+	wfRun := waitForRun(t, c.api, c.repo)
+	if err := d.wait(t, runTimeout); err != nil {
+		t.Errorf("daemon --once exited with %v\n%s", err, d.log)
+	}
+
+	jobs, err := c.api.Jobs(t.Context(), c.repo, wfRun.ID)
+	if err != nil {
+		t.Fatalf("list jobs: %v", err)
+	}
+	var succeeded, pending int
+	for _, job := range jobs {
+		switch {
+		case job.Conclusion == "success":
+			succeeded++
+		case job.Status != "in_progress" && job.Status != "completed":
+			pending++
+		}
+	}
+	if succeeded != 1 || pending != 1 {
+		t.Errorf("got %d succeeded and %d waiting jobs, want 1 and 1: %+v\n%s", succeeded, pending, jobs, d.log)
+	}
+}
+
+// testCLILabelsOverride checks that daemon --labels replaces the labels given at registration.
+func testCLILabelsOverride(t *testing.T) {
+	t.Parallel()
+	c := newCLIRunner(t, "e2e-registered", "")
+	d := c.startDaemon(t, "--labels", "e2e-override:docker://"+os.Getenv("E2E_JOB_IMAGE"))
+
+	pushWorkflow(t, c.api, c.repo, "cli_labels.yml")
+	wfRun := waitForRun(t, c.api, c.repo)
+	d.requireSuccess(t, c, wfRun.ID)
+
+	runners, err := c.api.Runners(t.Context(), c.repo)
+	if err != nil {
+		t.Fatalf("list runners: %v", err)
+	}
+	for _, runner := range runners {
+		if runner.Name != c.repo {
+			continue
+		}
+		var labels []string
+		for _, label := range runner.Labels {
+			labels = append(labels, label.Name)
+		}
+		if !slices.Equal(labels, []string{"e2e-override"}) {
+			t.Errorf("runner has labels %v on the server, want only the --labels override", labels)
+		}
+		return
+	}
+	t.Errorf("runner %q not found among %+v", c.repo, runners)
+}
+
+// testCLIShutdownDrains checks that SIGTERM lets a running job finish within shutdown_timeout.
+func testCLIShutdownDrains(t *testing.T) {
+	t.Parallel()
+	c := newCLIRunner(t, "e2e-shutdown", "  shutdown_timeout: 1m\n")
+	gate, release := newGate(t)
+	if err := c.api.CreateVariable(t.Context(), c.repo, "E2E_GATE", gate); err != nil {
+		t.Fatalf("create gate variable: %v", err)
+	}
+	d := c.startDaemon(t)
+
+	pushWorkflow(t, c.api, c.repo, "cli_shutdown.yml")
+	wfRun := waitForRun(t, c.api, c.repo)
+	waitForRunningJobLog(t, c.api, c.repo, wfRun.ID, "e2e-shutdown-started", 1)
+
+	d.terminate(t)
+	deadline := time.After(time.Minute)
+	for !strings.Contains(d.log.String(), "shutdown initiated") {
+		select {
+		case <-deadline:
+			t.Fatalf("daemon never started shutting down\n%s", d.log)
+		case <-time.After(pollInterval):
+		}
+	}
+	release()
+	if err := d.wait(t, runTimeout); err != nil {
+		t.Errorf("daemon did not exit cleanly: %v\n%s", err, d.log)
+	}
+	if strings.Contains(d.log.String(), "cancelled in progress jobs") {
+		t.Errorf("the running job was cancelled instead of drained\n%s", d.log)
+	}
+	d.requireSuccess(t, c, wfRun.ID)
+	if logs := runLogs(t, c.api, c.repo, wfRun.ID); commandRow(logs, "e2e-shutdown-finished") == "" {
+		t.Errorf("job did not run to the end:\n%s", logs)
+	}
+}
+
+// testCLIShutdownCancels checks that a job still running at shutdown_timeout is cancelled.
+func testCLIShutdownCancels(t *testing.T) {
+	t.Parallel()
+	c := newCLIRunner(t, "e2e-shutdown", "  shutdown_timeout: 1s\n")
+	d := c.startDaemon(t)
+
+	pushWorkflow(t, c.api, c.repo, "cli_shutdown.yml")
+	wfRun := waitForRun(t, c.api, c.repo)
+	waitForRunningJobLog(t, c.api, c.repo, wfRun.ID, "e2e-shutdown-started", 1)
+
+	d.terminate(t)
+	if err := d.wait(t, runTimeout); err != nil {
+		t.Errorf("daemon did not exit cleanly after cancelling the job: %v\n%s", err, d.log)
+	}
+	if !strings.Contains(d.log.String(), "cancelled in progress jobs") {
+		t.Errorf("daemon did not report cancelling the running job\n%s", d.log)
+	}
+	completed, err := c.api.WaitForRunConclusion(t.Context(), c.repo, wfRun.ID, time.Minute)
+	if err != nil {
+		t.Fatalf("cancelled run was never finalized: %v", err)
+	}
+	if completed.Conclusion == "success" {
+		t.Errorf("run concluded success although the job was cancelled")
+	}
+}
+
+func testExecArtifacts(t *testing.T) {
+	t.Parallel()
+	ctx := t.Context()
+
+	bin, err := runnerBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+	workflow, err := os.ReadFile("testdata/workflows/exec_artifact.yml")
+	if err != nil {
+		t.Fatal(err)
+	}
+	workflows := t.TempDir()
+	for _, name := range []string{"a.yml", "b.yml"} {
+		if err := os.WriteFile(filepath.Join(workflows, name), workflow, 0o644); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	workdir := t.TempDir()
+	for _, args := range [][]string{
+		{"init", "-q"},
+		{"remote", "add", "origin", "https://example.com/e2e/exec.git"},
+		{"-c", "user.name=e2e", "-c", "[email protected]", "commit", "-q", "--allow-empty", "-m", "init"},
+	} {
+		if out, err := exec.CommandContext(ctx, "git", append([]string{"-C", workdir}, args...)...).CombinedOutput(); err != nil {
+			t.Fatalf("git %v: %v\n%s", args, err, out)
+		}
+	}
+
+	artifacts := t.TempDir()
+	args := []string{"exec", "-C", workdir, "-W", workflows, "-i", os.Getenv("E2E_JOB_IMAGE"), "--artifact-server-path", artifacts, "--network", fixture.network}
+	cmd := exec.CommandContext(ctx, bin, args...)
+	cmd.Env = slices.DeleteFunc(os.Environ(), func(kv string) bool { return strings.HasPrefix(kv, "ACTIONS_") })
+	if out, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("exec: %v\n%s", err, out)
+	}
+	if blobs, _ := filepath.Glob(filepath.Join(artifacts, "v4", "*", "*", "blob")); len(blobs) != 2 {
+		t.Fatalf("want one v4 artifact blob per workflow run, got %v", blobs)
+	}
+}

e2e/compatibility_test.go

@@ -28,10 +28,23 @@ func TestCompatibility(t *testing.T) {
 	t.Run("payloads", testPayloads)
 	t.Run("cache_and_artifacts", testCacheAndArtifactRoundTrips)
 	t.Run("cancellation_and_log_streaming", testRunCancellation)
-	t.Run("dispatch", testWorkflowDispatch)
+	t.Run("dispatch", inAllModes(testWorkflowDispatch))
 	t.Run("builtin_checkout", testBuiltinCheckout)
+	t.Run("exec_artifacts", testExecArtifacts)
 	t.Run("moving_action_ref", testMovingActionRef)
 	t.Run("ephemeral", testEphemeralRunner)
+	t.Run("failure_paths", inAllModes(testFailurePaths))
+	t.Run("job_timeout", testJobTimeout)
+	t.Run("cli_register_daemon", testCLIRegisterDaemon)
+	t.Run("cli_once", testCLIOnce)
+	t.Run("cli_labels_override", testCLILabelsOverride)
+	t.Run("cli_shutdown_drains", testCLIShutdownDrains)
+	t.Run("cli_shutdown_cancels", testCLIShutdownCancels)
+	t.Run("host_mode", testHostMode)
+	t.Run("reusable_workflow", inAllModes(testReusableWorkflow))
+	t.Run("label_routing", testLabelRouting)
+	t.Run("capacity", testCapacity)
+	t.Run("reconnect", testReconnect)
 	t.Run("kubernetes", testKubernetes)
 }
 

e2e/dispatch_test.go

@@ -11,27 +11,11 @@ import (
 	"time"
 )
 
-func testWorkflowDispatch(t *testing.T) {
-	t.Parallel()
-	ctx := t.Context()
-
-	api, repo := newScenario(t)
-	pushWorkflow(t, api, repo, "dispatch.yml")
-
-	branch, err := api.DefaultBranch(ctx, repo)
-	if err != nil {
-		t.Fatalf("get default branch: %v", err)
+func testWorkflowDispatch(t *testing.T, m mode) {
+	result := runWorkflow(t, m, workflowSpec{files: []string{"dispatch.yml"}, inputs: map[string]string{"subject": "dispatch-input-value"}})
+	if result.conclusion != "success" {
+		t.Errorf("run concluded %q, want success", result.conclusion)
 	}
-	inputs := map[string]string{"subject": "dispatch-input-value"}
-	if err := waitForDispatch(ctx, api, repo, "dispatch.yml", branch, inputs); err != nil {
-		t.Fatalf("dispatch workflow: %v", err)
-	}
-
-	dispatched := waitForRun(t, api, repo)
-	if dispatched.Event != "workflow_dispatch" {
-		t.Fatalf("run event is %q, want workflow_dispatch", dispatched.Event)
-	}
-	requireSuccess(t, api, repo, dispatched.ID)
 }
 
 // Gitea indexes workflows asynchronously after the Contents API commit.

e2e/failure_test.go

@@ -0,0 +1,45 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"testing"
+	"time"
+)
+
+func testFailurePaths(t *testing.T, m mode) {
+	result := runWorkflow(t, m, workflowSpec{files: []string{"failure.yml"}})
+	if result.conclusion != "failure" {
+		t.Errorf("run concluded %q, want failure", result.conclusion)
+	}
+	for job, want := range map[string]string{"fail": "failure", "tolerated": "success", "dependent": "skipped"} {
+		if got := result.job(job); got != want {
+			t.Errorf("job %q concluded %q, want %q", job, got, want)
+		}
+	}
+	for _, marker := range []string{"e2e-before-fail", "e2e-failure-cleanup", "e2e-tolerated-next"} {
+		if !result.hasLine(marker) {
+			t.Errorf("logs are missing %q", marker)
+		}
+	}
+	if result.hasLine("e2e-skipped-step") {
+		t.Error("a success() step ran after a failed step")
+	}
+}
+
+func testJobTimeout(t *testing.T) {
+	t.Parallel()
+	api, repo, _ := startIsolatedScenario(t, "timeout.yml", "e2e-timeout", runnerOptions{timeout: 15 * time.Second})
+	wfRun := waitForRun(t, api, repo)
+	completed, err := api.WaitForRunConclusion(t.Context(), repo, wfRun.ID, runTimeout)
+	if err != nil {
+		dumpRunLogs(t, api, repo, wfRun.ID)
+		t.Fatalf("wait for run: %v", err)
+	}
+	if logs := runLogs(t, api, repo, wfRun.ID); completed.Conclusion != "failure" || commandRow(logs, "e2e-timeout-started") == "" {
+		t.Errorf("run concluded %q, want failure after the job started, logs:\n%s", completed.Conclusion, logs)
+	}
+}

e2e/gitea_api.go

@@ -37,6 +37,14 @@ type ActionJob struct {
 	Name       string `json:"name"`
 	Status     string `json:"status"`
 	Conclusion string `json:"conclusion"`
+	RunnerName string `json:"runner_name"`
+}
+
+type ActionRunner struct {
+	Name   string `json:"name"`
+	Labels []struct {
+		Name string `json:"name"`
+	} `json:"labels"`
 }
 
 func (a *GiteaAPI) CreateRepo(ctx context.Context, name string) error {
@@ -45,12 +53,16 @@ func (a *GiteaAPI) CreateRepo(ctx context.Context, name string) error {
 }
 
 func (a *GiteaAPI) CreateFile(ctx context.Context, repo, path, content, message string) error {
-	body := map[string]any{
-		"content": base64.StdEncoding.EncodeToString([]byte(content)),
-		"message": message,
+	return a.CreateFiles(ctx, repo, map[string]string{path: content}, message)
+}
+
+func (a *GiteaAPI) CreateFiles(ctx context.Context, repo string, files map[string]string, message string) error {
+	var operations []map[string]string
+	for path, content := range files {
+		operations = append(operations, map[string]string{"operation": "create", "path": path, "content": base64.StdEncoding.EncodeToString([]byte(content))})
 	}
-	url := fmt.Sprintf("/api/v1/repos/%s/%s/contents/%s", giteaAdminUser, repo, path)
-	return a.doJSON(ctx, http.MethodPost, url, body, nil)
+	body := map[string]any{"files": operations, "message": message}
+	return a.doJSON(ctx, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/contents", giteaAdminUser, repo), body, nil)
 }
 
 func (a *GiteaAPI) CreateTag(ctx context.Context, repo, name string) error {
@@ -146,6 +158,17 @@ func (a *GiteaAPI) Jobs(ctx context.Context, repo string, runID int64) ([]Action
 	return resp.Jobs, nil
 }
 
+func (a *GiteaAPI) Runners(ctx context.Context, repo string) ([]ActionRunner, error) {
+	var resp struct {
+		Runners []ActionRunner `json:"runners"`
+	}
+	url := fmt.Sprintf("/api/v1/repos/%s/%s/actions/runners", giteaAdminUser, repo)
+	if err := a.doJSON(ctx, http.MethodGet, url, nil, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Runners, nil
+}
+
 func (a *GiteaAPI) JobLogs(ctx context.Context, repo string, jobID int64) (string, error) {
 	url := fmt.Sprintf("/api/v1/repos/%s/%s/actions/jobs/%d/logs", giteaAdminUser, repo, jobID)
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, a.baseURL+url, nil)
@@ -165,7 +188,7 @@ func (a *GiteaAPI) JobLogs(ctx context.Context, repo string, jobID int64) (strin
 		return "", err
 	}
 	if resp.StatusCode >= 300 {
-		return "", fmt.Errorf("GET %s: %d: %s", url, resp.StatusCode, body)
+		return "", statusError{method: http.MethodGet, path: url, code: resp.StatusCode, body: string(body)}
 	}
 	return string(body), nil
 }

e2e/gitea_fixture.go

@@ -15,9 +15,7 @@ import (
 	"io"
 	"net"
 	"net/http"
-	"net/netip"
 	"os"
-	"strconv"
 	"strings"
 	"time"
 
@@ -40,7 +38,8 @@ type GiteaFixture struct {
 	image      string
 	version    string
 	baseURL    string
-	network    string // set in container mode; jobs must join it
+	network    string // the user-defined network every container of the suite joins
+	selfIP     string // the test process's address on network, which job containers can reach
 	adminToken string
 }
 
@@ -55,44 +54,10 @@ func dockerClient(ctx context.Context) (mobyclient.APIClient, error) {
 	return cli, nil
 }
 
-// Prefer docker bridge gateway, then LAN IP; never 127.0.0.1 (ACTIONS_RUNTIME_URL must reach the host from job containers).
-func hostAddress(ctx context.Context, cli mobyclient.APIClient) netip.Addr {
-	if gateway, ok := bridgeGateway(ctx, cli); ok && bindable(gateway) {
-		return gateway
-	}
-
-	loopback := netip.AddrFrom4([4]byte{127, 0, 0, 1})
-
-	conn, err := net.Dial("udp", "192.0.2.1:80") // TEST-NET-1: routing table only
-	if err != nil {
-		return loopback
-	}
-	defer conn.Close()
-
-	addr, ok := conn.LocalAddr().(*net.UDPAddr)
-	if !ok {
-		return loopback
-	}
-	return addr.AddrPort().Addr().Unmap()
-}
-
-func bridgeGateway(ctx context.Context, cli mobyclient.APIClient) (netip.Addr, bool) {
-	inspected, err := cli.NetworkInspect(ctx, "bridge", mobyclient.NetworkInspectOptions{})
-	if err != nil {
-		return netip.Addr{}, false
-	}
-	for _, cfg := range inspected.Network.IPAM.Config {
-		if cfg.Gateway.Is4() {
-			return cfg.Gateway, true
-		}
-	}
-	return netip.Addr{}, false
-}
-
 // When tests run inside a container (sibling docker daemon), join that network and address by name.
-func selfNetwork(ctx context.Context, cli mobyclient.APIClient) (string, bool) {
+func selfNetwork(ctx context.Context, cli mobyclient.APIClient) (string, string, bool) {
 	if _, err := os.Stat("/.dockerenv"); err != nil {
-		return "", false
+		return "", "", false
 	}
 
 	id, err := os.ReadFile("/proc/sys/kernel/hostname")
@@ -100,42 +65,19 @@ func selfNetwork(ctx context.Context, cli mobyclient.APIClient) (string, bool) {
 		id, err = os.ReadFile("/etc/hostname")
 	}
 	if err != nil {
-		return "", false
+		return "", "", false
 	}
 
 	inspected, err := cli.ContainerInspect(ctx, strings.TrimSpace(string(id)), mobyclient.ContainerInspectOptions{})
 	if err != nil || inspected.Container.NetworkSettings == nil {
-		return "", false
+		return "", "", false
 	}
-	for name := range inspected.Container.NetworkSettings.Networks {
+	for name, endpoint := range inspected.Container.NetworkSettings.Networks {
 		if name != "host" && name != "none" && name != "bridge" { // only user-defined nets have DNS
-			return name, true
+			return name, endpoint.IPAddress.String(), true
 		}
 	}
-	return "", false
-}
-
-func bindable(addr netip.Addr) bool {
-	l, err := net.Listen("tcp", net.JoinHostPort(addr.String(), "0"))
-	if err != nil {
-		return false
-	}
-	_ = l.Close()
-	return true
-}
-
-func freeHostPort(host string) (int, error) {
-	l, err := net.Listen("tcp", net.JoinHostPort(host, "0"))
-	if err != nil {
-		return 0, err
-	}
-	defer l.Close()
-
-	addr, ok := l.Addr().(*net.TCPAddr)
-	if !ok {
-		return 0, fmt.Errorf("unexpected listener address type %T", l.Addr())
-	}
-	return addr.Port, nil
+	return "", "", false
 }
 
 func StartGitea(ctx context.Context, cli mobyclient.APIClient) (*GiteaFixture, error) {
@@ -151,31 +93,12 @@ func StartGitea(ctx context.Context, cli mobyclient.APIClient) (*GiteaFixture, e
 		return nil, errors.New("E2E_GITEA_IMAGE is not set")
 	}
 
-	name := fmt.Sprintf("gitea-runner-e2e-%d", time.Now().UnixNano())
-	containerPort := network.MustParsePort("3000/tcp")
-
-	var (
-		baseURL      string
-		hostConfig   = &apicontainer.HostConfig{}
-		netConfig    *network.NetworkingConfig
-		sharedNet, _ = selfNetwork(ctx, cli)
-	)
-	if sharedNet != "" {
-		baseURL = "http://" + net.JoinHostPort(name, "3000")
-		netConfig = &network.NetworkingConfig{
-			EndpointsConfig: map[string]*network.EndpointSettings{sharedNet: {}},
-		}
-	} else {
-		host := hostAddress(ctx, cli)
-		port, err := freeHostPort(host.String())
-		if err != nil {
-			return nil, fmt.Errorf("find a free host port: %w", err)
-		}
-		baseURL = "http://" + net.JoinHostPort(host.String(), strconv.Itoa(port))
-		hostConfig.PortBindings = network.PortMap{
-			containerPort: []network.PortBinding{{HostIP: host, HostPort: strconv.Itoa(port)}},
-		}
+	sharedNet, selfIP, ok := selfNetwork(ctx, cli)
+	if !ok {
+		return nil, errors.New("e2e tests must run in a container on a user-defined network, `make test-e2e` provides one")
 	}
+	name := fmt.Sprintf("gitea-runner-e2e-%d", time.Now().UnixNano())
+	baseURL := "http://" + net.JoinHostPort(name, "3000")
 
 	if _, err := cli.ImageInspect(ctx, image); err != nil {
 		return nil, fmt.Errorf("inspect gitea image %s: %w", image, err)
@@ -191,17 +114,16 @@ func StartGitea(ctx context.Context, cli mobyclient.APIClient) (*GiteaFixture, e
 				"GITEA__server__LFS_START_SERVER=true",
 				"GITEA__server__ROOT_URL=" + baseURL + "/",
 			},
-			ExposedPorts: network.PortSet{containerPort: struct{}{}},
 		},
-		HostConfig:       hostConfig,
-		NetworkingConfig: netConfig,
+		HostConfig:       &apicontainer.HostConfig{Tmpfs: map[string]string{"/data": "exec"}},
+		NetworkingConfig: &network.NetworkingConfig{EndpointsConfig: map[string]*network.EndpointSettings{sharedNet: {}}},
 		Name:             name,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("create gitea container: %w", err)
 	}
 
-	f := &GiteaFixture{cli: cli, id: resp.ID, image: image, baseURL: baseURL, network: sharedNet}
+	f := &GiteaFixture{cli: cli, id: resp.ID, image: image, baseURL: baseURL, network: sharedNet, selfIP: selfIP}
 	closeClient = false
 
 	if _, err := cli.ContainerStart(ctx, f.id, mobyclient.ContainerStartOptions{}); err != nil {

e2e/host_test.go

@@ -0,0 +1,33 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"os"
+	"testing"
+)
+
+func testHostMode(t *testing.T) {
+	t.Parallel()
+	ctx := t.Context()
+
+	api, repo := newScenario(t)
+	hostname, err := os.Hostname()
+	if err != nil {
+		t.Fatalf("hostname: %v", err)
+	}
+	if err := api.CreateVariable(ctx, repo, "E2E_HOSTNAME", hostname); err != nil {
+		t.Fatalf("create variable: %v", err)
+	}
+	startRunner(t, repo, "e2e-host", runnerOptions{host: true})
+	pushWorkflow(t, api, repo, "host.yml")
+
+	wfRun := waitForRun(t, api, repo)
+	requireSuccess(t, api, repo, wfRun.ID)
+	if logs := runLogs(t, api, repo, wfRun.ID); commandRow(logs, "e2e-host-job-ran") == "" {
+		t.Errorf("job logs are missing the marker:\n%s", logs)
+	}
+}

e2e/kubernetes_test.go

@@ -9,15 +9,16 @@ import (
 	"bufio"
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
-	"net"
-	"net/netip"
 	"net/url"
 	"os"
 	"path/filepath"
-	"strconv"
+	"slices"
 	"strings"
+	"sync"
+	"sync/atomic"
 	"testing"
 	"time"
 
@@ -32,125 +33,168 @@ import (
 func testKubernetes(t *testing.T) {
 	t.Parallel()
 	ctx := t.Context()
-	k3sID, kubernetes, images := startK3s(t)
+	cluster := requireCluster(t)
 
 	api, repo := newScenario(t)
-	if err := api.CreateVariable(ctx, repo, "E2E_SERVICE_IMAGE", images[1]); err != nil {
+	if err := api.CreateVariable(ctx, repo, "E2E_SERVICE_IMAGE", cluster.serviceImage); err != nil {
 		t.Fatalf("create service image variable: %v", err)
 	}
-	startRunner(t, repo, "e2e-kubernetes", runnerOptions{image: images[0], kubernetes: kubernetes})
+	startRunner(t, repo, "e2e-kubernetes", runnerOptions{image: cluster.jobImage, kubernetes: cluster.kubernetes})
 	pushWorkflow(t, api, repo, "kubernetes.yml")
 
 	wfRun := waitForRun(t, api, repo)
 	requireSuccess(t, api, repo, wfRun.ID)
+}
 
-	if out, err := containerExec(ctx, fixture.cli, k3sID, "", nil,
+// checkClusterLeaks runs after every test, so a pod or secret any of them left behind fails the suite.
+func checkClusterLeaks() error {
+	if !clusterStarted.Load() {
+		return nil
+	}
+	cluster, err := k3s()
+	if err != nil {
+		return nil // the tests that needed the cluster already failed
+	}
+	if out, err := containerExec(context.Background(), dockerCLI, cluster.id, "", nil,
 		"kubectl", "wait", "--for=delete", "pods,secrets", "--selector=app.kubernetes.io/managed-by=gitea-runner", "--timeout=1m",
 	); err != nil {
-		t.Errorf("job pods or secrets left behind: %v: %s", err, out)
+		return fmt.Errorf("job pods or secrets left behind: %w: %s", err, out)
+	}
+	return nil
+}
+
+type kubeCluster struct {
+	id                     string
+	kubernetes             *config.Kubernetes
+	jobImage, serviceImage string
+}
+
+var (
+	k3s            = sync.OnceValues(startK3s) // independent of Gitea, so it can boot alongside it
+	clusterStarted atomic.Bool
+	clusterCleanup []func()
+	sharedCluster  = sync.OnceValues(func() (*kubeCluster, error) {
+		cluster, err := k3s()
+		if err != nil {
+			return nil, err
+		}
+		gitea, err := fixture.cli.ContainerInspect(context.Background(), fixture.id, mobyclient.ContainerInspectOptions{})
+		if err != nil {
+			return nil, fmt.Errorf("inspect gitea container: %w", err)
+		}
+		giteaURL, err := url.Parse(fixture.baseURL)
+		if err != nil {
+			return nil, fmt.Errorf("parse gitea url: %w", err)
+		}
+		cluster.kubernetes.PodTemplate = map[string]any{"spec": map[string]any{"hostAliases": []any{map[string]any{
+			"ip":        gitea.Container.NetworkSettings.Networks[fixture.network].IPAddress.String(),
+			"hostnames": []any{giteaURL.Hostname()},
+		}}}}
+		return cluster, nil
+	})
+)
+
+func requireCluster(t *testing.T) *kubeCluster {
+	t.Helper()
+	cluster, err := sharedCluster()
+	if err != nil {
+		t.Fatal(err)
+	}
+	return cluster
+}
+
+func stopCluster() {
+	if !clusterStarted.Load() {
+		return
+	}
+	_, _ = k3s()
+	for _, cleanup := range slices.Backward(clusterCleanup) {
+		cleanup()
 	}
 }
 
-func startK3s(t *testing.T) (string, *config.Kubernetes, []string) {
-	t.Helper()
-	ctx := t.Context()
-	cli := fixture.cli
+func startK3s() (*kubeCluster, error) {
+	clusterStarted.Store(true)
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
+	defer cancel()
+	cli := dockerCLI
+	sharedNet, _, ok := selfNetwork(ctx, cli)
+	if !ok {
+		return nil, errors.New("e2e tests must run in a container on a user-defined network")
+	}
 
 	name := fmt.Sprintf("gitea-runner-e2e-k3s-%d", time.Now().UnixNano())
-	apiPort := network.MustParsePort("6443/tcp")
 	server := "https://" + name + ":6443"
-	hostConfig := &apicontainer.HostConfig{Privileged: true}
-	var netConfig *network.NetworkingConfig
-	if fixture.network != "" {
-		netConfig = &network.NetworkingConfig{EndpointsConfig: map[string]*network.EndpointSettings{fixture.network: {}}}
-	} else {
-		loopback := netip.MustParseAddr("127.0.0.1")
-		port, err := freeHostPort(loopback.String())
-		if err != nil {
-			t.Fatalf("find a free host port: %v", err)
-		}
-		server = "https://" + net.JoinHostPort(loopback.String(), strconv.Itoa(port))
-		hostConfig.PortBindings = network.PortMap{apiPort: []network.PortBinding{{HostIP: loopback, HostPort: strconv.Itoa(port)}}}
-	}
 
 	created, err := cli.ContainerCreate(ctx, mobyclient.ContainerCreateOptions{
 		Config: &apicontainer.Config{
-			Image:        os.Getenv("E2E_K3S_IMAGE"),
-			Cmd:          []string{"server", "--disable=traefik,metrics-server,servicelb,local-storage,coredns", "--tls-san=" + name, "--kubelet-arg=fail-cgroupv1=false"},
-			ExposedPorts: network.PortSet{apiPort: struct{}{}},
+			Image: os.Getenv("E2E_K3S_IMAGE"),
+			Cmd:   []string{"server", "--disable=traefik,metrics-server,servicelb,local-storage,coredns", "--tls-san=" + name, "--kubelet-arg=fail-cgroupv1=false"},
 		},
-		HostConfig:       hostConfig,
-		NetworkingConfig: netConfig,
+		HostConfig:       &apicontainer.HostConfig{Privileged: true},
+		NetworkingConfig: &network.NetworkingConfig{EndpointsConfig: map[string]*network.EndpointSettings{sharedNet: {}}},
 		Name:             name,
 	})
 	if err != nil {
-		t.Fatalf("create k3s container: %v", err)
+		return nil, fmt.Errorf("create k3s container: %w", err)
 	}
-	t.Cleanup(func() {
+	clusterCleanup = append(clusterCleanup, func() {
 		_, _ = cli.ContainerRemove(context.Background(), created.ID, mobyclient.ContainerRemoveOptions{Force: true, RemoveVolumes: true})
 	})
 	if _, err := cli.ContainerStart(ctx, created.ID, mobyclient.ContainerStartOptions{}); err != nil {
-		t.Fatalf("start k3s container: %v", err)
+		return nil, fmt.Errorf("start k3s container: %w", err)
 	}
 
-	containerdCtx, stopWaiting := context.WithTimeout(ctx, 2*time.Minute)
-	defer stopWaiting()
-	if err := waitForContainerLog(containerdCtx, created.ID, "containerd is now running"); err != nil {
-		t.Fatalf("wait for k3s containerd: %v", err)
+	if err := waitForContainerLog(ctx, created.ID, "containerd is now running"); err != nil {
+		return nil, fmt.Errorf("wait for k3s containerd: %w", err)
+	}
+	sandboxPulled := make(chan struct{})
+	go func() { // first pods would otherwise pull the sandbox image themselves
+		defer close(sandboxPulled)
+		pullCtx, cancel := context.WithTimeout(ctx, 30*time.Second)
+		defer cancel()
+		_, _ = containerExec(pullCtx, cli, created.ID, "", nil, "sh", "-c",
+			`ctr --namespace=k8s.io images pull "docker.io/$(sed -n 's/^ *sandbox = "\(.*\)"$/\1/p' /var/lib/rancher/k3s/agent/etc/containerd/config.toml)"`)
+	}()
+	images, err := preloadImages(ctx, created.ID, os.Getenv("E2E_JOB_IMAGE"), os.Getenv("SERVICE_IMAGE"))
+	<-sandboxPulled
+	if err != nil {
+		return nil, err
 	}
-	images := preloadImages(t, created.ID, os.Getenv("E2E_JOB_IMAGE"), os.Getenv("SERVICE_IMAGE"))
 
-	waitCtx, cancel := context.WithTimeout(ctx, 2*time.Minute)
-	defer cancel()
 	for {
-		_, err := containerExec(waitCtx, cli, created.ID, "", nil, "kubectl", "get", "serviceaccount", "default")
+		_, err := containerExec(ctx, cli, created.ID, "", nil, "kubectl", "get", "serviceaccount", "default")
 		if err == nil {
 			break
 		}
 		inspected, inspectErr := cli.ContainerInspect(ctx, created.ID, mobyclient.ContainerInspectOptions{})
-		if inspectErr != nil || !inspected.Container.State.Running || waitCtx.Err() != nil {
+		if inspectErr != nil || !inspected.Container.State.Running || ctx.Err() != nil {
 			var logs bytes.Buffer
-			if reader, logsErr := cli.ContainerLogs(ctx, created.ID, mobyclient.ContainerLogsOptions{ShowStdout: true, ShowStderr: true, Tail: "30"}); logsErr == nil {
+			if reader, logsErr := cli.ContainerLogs(context.Background(), created.ID, mobyclient.ContainerLogsOptions{ShowStdout: true, ShowStderr: true, Tail: "30"}); logsErr == nil {
 				_, _ = stdcopy.StdCopy(&logs, &logs, reader)
 				_ = reader.Close()
 			}
-			t.Fatalf("k3s did not start: %v, state %+v %v, last log lines:\n%s", err, inspected.Container.State, inspectErr, logs.String())
+			return nil, fmt.Errorf("k3s did not start: %w, state %+v %v, last log lines:\n%s", err, inspected.Container.State, inspectErr, logs.String())
 		}
 		select {
-		case <-waitCtx.Done():
+		case <-ctx.Done():
 		case <-time.After(pollInterval):
 		}
 	}
 
 	kubeconfig, err := containerExec(ctx, cli, created.ID, "", nil, "cat", "/etc/rancher/k3s/k3s.yaml")
 	if err != nil {
-		t.Fatalf("read kubeconfig: %v", err)
+		return nil, fmt.Errorf("read kubeconfig: %w", err)
 	}
-	path := filepath.Join(t.TempDir(), "kubeconfig")
+	path := filepath.Join(binDir, "kubeconfig")
 	if err := os.WriteFile(path, []byte(strings.ReplaceAll(kubeconfig, "https://127.0.0.1:6443", server)), 0o600); err != nil {
-		t.Fatalf("write kubeconfig: %v", err)
+		return nil, fmt.Errorf("write kubeconfig: %w", err)
 	}
-	kubernetes := &config.Kubernetes{Kubeconfig: path, Namespace: "default"}
-
-	if fixture.network != "" {
-		gitea, err := cli.ContainerInspect(ctx, fixture.id, mobyclient.ContainerInspectOptions{})
-		if err != nil {
-			t.Fatalf("inspect gitea container: %v", err)
-		}
-		giteaURL, err := url.Parse(fixture.baseURL)
-		if err != nil {
-			t.Fatalf("parse gitea url: %v", err)
-		}
-		kubernetes.PodTemplate = map[string]any{"spec": map[string]any{"hostAliases": []any{map[string]any{
-			"ip":        gitea.Container.NetworkSettings.Networks[fixture.network].IPAddress.String(),
-			"hostnames": []any{giteaURL.Hostname()},
-		}}}}
-	}
-	return created.ID, kubernetes, images
+	return &kubeCluster{id: created.ID, kubernetes: &config.Kubernetes{Kubeconfig: path, Namespace: "default"}, jobImage: images[0], serviceImage: images[1]}, nil
 }
 
 func waitForContainerLog(ctx context.Context, id, message string) error {
-	logs, err := fixture.cli.ContainerLogs(ctx, id, mobyclient.ContainerLogsOptions{ShowStdout: true, ShowStderr: true, Follow: true})
+	logs, err := dockerCLI.ContainerLogs(ctx, id, mobyclient.ContainerLogsOptions{ShowStdout: true, ShowStderr: true, Follow: true})
 	if err != nil {
 		return err
 	}
@@ -175,25 +219,23 @@ func waitForContainerLog(ctx context.Context, id, message string) error {
 	return fmt.Errorf("container exited before logging %q", message)
 }
 
-func preloadImages(t *testing.T, k3sID string, images ...string) []string {
-	t.Helper()
-	ctx := t.Context()
+func preloadImages(ctx context.Context, k3sID string, images ...string) ([]string, error) {
 	var aliases []string
 	for index, image := range images {
 		alias := fmt.Sprintf("gitea-runner-e2e/preload-%d:%d", index, time.Now().UnixNano())
-		if _, err := fixture.cli.ImageTag(ctx, mobyclient.ImageTagOptions{Source: image, Target: alias}); err != nil {
-			t.Fatalf("tag %s: %v", image, err)
+		if _, err := dockerCLI.ImageTag(ctx, mobyclient.ImageTagOptions{Source: image, Target: alias}); err != nil {
+			return nil, fmt.Errorf("tag %s: %w", image, err)
 		}
-		t.Cleanup(func() { _, _ = fixture.cli.ImageRemove(context.Background(), alias, mobyclient.ImageRemoveOptions{}) })
+		clusterCleanup = append(clusterCleanup, func() { _, _ = dockerCLI.ImageRemove(context.Background(), alias, mobyclient.ImageRemoveOptions{}) })
 		aliases = append(aliases, alias)
 	}
-	archive, err := fixture.cli.ImageSave(ctx, aliases)
+	archive, err := dockerCLI.ImageSave(ctx, aliases)
 	if err != nil {
-		t.Fatalf("save %v: %v", images, err)
+		return nil, fmt.Errorf("save %v: %w", images, err)
 	}
 	defer archive.Close()
-	if out, err := containerExec(ctx, fixture.cli, k3sID, "", archive, "ctr", "--namespace=k8s.io", "images", "import", "-"); err != nil {
-		t.Fatalf("import %v into k3s: %v: %s", images, err, out)
+	if out, err := containerExec(ctx, dockerCLI, k3sID, "", archive, "ctr", "--namespace=k8s.io", "images", "import", "-"); err != nil {
+		return nil, fmt.Errorf("import %v into k3s: %w: %s", images, err, out)
 	}
-	return aliases
+	return aliases, nil
 }

e2e/main_test.go

@@ -6,15 +6,27 @@
 package e2e
 
 import (
+	"cmp"
 	"context"
+	"errors"
+	"flag"
 	"fmt"
+	"net"
+	"net/http"
 	"os"
+	"os/exec"
+	"path/filepath"
 	"regexp"
+	"strconv"
 	"strings"
+	"sync"
+	"sync/atomic"
 	"testing"
 	"time"
 
 	"gitea.com/gitea/runner/internal/app/poll"
+
+	mobyclient "github.com/moby/moby/client"
 )
 
 const runTimeout = 3 * time.Minute
@@ -25,6 +37,18 @@ var fixture *GiteaFixture
 
 var skipReason string
 
+var binDir string
+
+var dockerCLI mobyclient.APIClient
+
+var runnerBinary = sync.OnceValues(func() (string, error) {
+	bin := filepath.Join(binDir, "gitea-runner")
+	if out, err := exec.Command(cmp.Or(os.Getenv("GO"), "go"), "build", "-o", bin, "..").CombinedOutput(); err != nil {
+		return "", fmt.Errorf("build runner: %w\n%s", err, out)
+	}
+	return bin, nil
+})
+
 func TestMain(m *testing.M) {
 	os.Exit(runSuite(m))
 }
@@ -38,6 +62,17 @@ func runSuite(m *testing.M) int {
 		skipReason = fmt.Sprintf("docker unavailable: %v", err)
 		return m.Run()
 	}
+	dockerCLI = cli
+
+	if binDir, err = os.MkdirTemp("", "gitea-runner-e2e-"); err != nil {
+		fmt.Fprintf(os.Stderr, "create binary dir: %v\n", err)
+		return 1
+	}
+	defer os.RemoveAll(binDir)
+	defer stopCluster()
+	if flag.Parse(); flag.Lookup("test.run").Value.String() == "" { // a filtered run starts the cluster only if it needs it
+		go func() { _, _ = k3s() }()
+	}
 
 	f, err := StartGitea(ctx, cli)
 	if err != nil {
@@ -49,7 +84,12 @@ func runSuite(m *testing.M) int {
 
 	fmt.Fprintf(os.Stderr, "gitea fixture: image=%s version=%s\n", fixture.image, fixture.version)
 
-	return m.Run()
+	code := m.Run()
+	if err := checkClusterLeaks(); err != nil && code == 0 {
+		fmt.Fprintln(os.Stderr, err)
+		code = 1
+	}
+	return code
 }
 
 func newScenario(t *testing.T) (*GiteaAPI, string) {
@@ -109,6 +149,10 @@ func runLogs(t *testing.T, api *GiteaAPI, repo string, runID int64) string {
 	var all strings.Builder
 	for _, job := range jobs {
 		logs, err := api.JobLogs(ctx, repo, job.ID)
+		var response statusError
+		if errors.As(err, &response) && response.code == http.StatusNotFound {
+			continue // skipped jobs and reusable workflow callers never ran a task, so have no log
+		}
 		if err != nil {
 			t.Fatalf("job logs for %s: %v", job.Name, err)
 		}
@@ -136,6 +180,24 @@ func dumpRunLogs(t *testing.T, api *GiteaAPI, repo string, runID int64) {
 	}
 }
 
+// newGate serves a URL that answers 503 until release, for jobs to poll instead of sleeping.
+func newGate(t *testing.T) (string, func()) {
+	t.Helper()
+	var released atomic.Bool
+	listener, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatalf("listen for the gate: %v", err)
+	}
+	server := &http.Server{Handler: http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		if !released.Load() {
+			w.WriteHeader(http.StatusServiceUnavailable)
+		}
+	}), ReadHeaderTimeout: time.Second}
+	go func() { _ = server.Serve(listener) }()
+	t.Cleanup(func() { _ = server.Close() })
+	return fmt.Sprintf("http://%s/", net.JoinHostPort(fixture.selfIP, strconv.Itoa(listener.Addr().(*net.TCPAddr).Port))), func() { released.Store(true) }
+}
+
 func waitForRun(t *testing.T, api *GiteaAPI, repo string) *ActionRun {
 	t.Helper()
 	return waitForRunAfter(t, api, repo, 0)

e2e/modes_test.go

@@ -0,0 +1,227 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"bufio"
+	"bytes"
+	"cmp"
+	"encoding/json"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"slices"
+	"strings"
+	"testing"
+)
+
+type mode struct {
+	exec, kubernetes bool
+}
+
+var allModes = []mode{{}, {kubernetes: true}, {exec: true}, {exec: true, kubernetes: true}}
+
+func (m mode) String() string {
+	driver, backend := "daemon", "docker"
+	if m.exec {
+		driver = "exec"
+	}
+	if m.kubernetes {
+		backend = "kubernetes"
+	}
+	return driver + "_" + backend
+}
+
+func inAllModes(scenario func(*testing.T, mode)) func(*testing.T) {
+	return func(t *testing.T) {
+		t.Parallel()
+		for _, m := range allModes {
+			t.Run(m.String(), func(t *testing.T) {
+				t.Parallel()
+				scenario(t, m)
+			})
+		}
+	}
+}
+
+type workflowSpec struct {
+	files    []string
+	inputs   map[string]string // dispatches files[0] instead of relying on push
+	execArgs []string
+}
+
+type workflowResult struct {
+	conclusion string
+	jobs       map[string]string
+	lines      []string
+}
+
+func (r *workflowResult) job(id string) string {
+	return cmp.Or(r.jobs[id], "skipped") // exec reports nothing for a job it skipped
+}
+
+func (r *workflowResult) hasLine(line string) bool {
+	return slices.Contains(r.lines, line)
+}
+
+func runWorkflow(t *testing.T, m mode, spec workflowSpec) *workflowResult {
+	t.Helper()
+	run := daemonWorkflow
+	if m.exec {
+		run = execWorkflow
+	}
+	result := run(t, m, spec)
+	t.Cleanup(func() {
+		if t.Failed() {
+			t.Logf("%s concluded %q, jobs %v, logs:\n%s", m, result.conclusion, result.jobs, strings.Join(result.lines, "\n"))
+		}
+	})
+	return result
+}
+
+func daemonWorkflow(t *testing.T, m mode, spec workflowSpec) *workflowResult {
+	t.Helper()
+	ctx := t.Context()
+
+	api, repo := newScenario(t)
+	if m.kubernetes {
+		cluster := requireCluster(t)
+		startRunner(t, repo, "e2e-kubernetes", runnerOptions{image: cluster.jobImage, kubernetes: cluster.kubernetes, capacity: 16})
+	}
+	files := map[string]string{}
+	for _, file := range spec.files {
+		content, err := os.ReadFile(filepath.Join("testdata", "workflows", file))
+		if err != nil {
+			t.Fatalf("read workflow fixture %s: %v", file, err)
+		}
+		if m.kubernetes {
+			content = bytes.ReplaceAll(content, []byte("runs-on: ubuntu-latest"), []byte("runs-on: e2e-kubernetes"))
+		}
+		files[".gitea/workflows/"+file] = string(content)
+	}
+	if err := api.CreateFiles(ctx, repo, files, "add workflows"); err != nil {
+		t.Fatalf("push workflows: %v", err)
+	}
+	if spec.inputs != nil {
+		branch, err := api.DefaultBranch(ctx, repo)
+		if err != nil {
+			t.Fatalf("get default branch: %v", err)
+		}
+		if err := waitForDispatch(ctx, api, repo, spec.files[0], branch, spec.inputs); err != nil {
+			t.Fatalf("dispatch workflow: %v", err)
+		}
+	}
+
+	wfRun := waitForRun(t, api, repo)
+	completed, err := api.WaitForRunConclusion(ctx, repo, wfRun.ID, runTimeout)
+	if err != nil {
+		dumpRunLogs(t, api, repo, wfRun.ID)
+		t.Fatalf("wait for run: %v", err)
+	}
+	jobs, err := api.Jobs(ctx, repo, wfRun.ID)
+	if err != nil {
+		t.Fatalf("list jobs: %v", err)
+	}
+	result := &workflowResult{conclusion: completed.Conclusion, jobs: map[string]string{}}
+	for _, job := range jobs {
+		result.jobs[job.Name] = job.Conclusion
+	}
+	for line := range strings.SplitSeq(runLogs(t, api, repo, wfRun.ID), "\n") {
+		if _, payload, found := strings.Cut(line, "Z "); found {
+			result.lines = append(result.lines, strings.TrimRight(payload, "\r"))
+		}
+	}
+	return result
+}
+
+func execWorkflow(t *testing.T, m mode, spec workflowSpec) *workflowResult {
+	t.Helper()
+	ctx := t.Context()
+
+	bin, err := runnerBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+	workdir := t.TempDir()
+	workflows := filepath.Join(workdir, ".gitea", "workflows")
+	if err := os.MkdirAll(workflows, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	for _, file := range spec.files {
+		content, err := os.ReadFile(filepath.Join("testdata", "workflows", file))
+		if err != nil {
+			t.Fatalf("read workflow fixture %s: %v", file, err)
+		}
+		if err := os.WriteFile(filepath.Join(workflows, file), content, 0o644); err != nil {
+			t.Fatal(err)
+		}
+	}
+	for _, args := range [][]string{
+		{"init", "-q"},
+		{"remote", "add", "origin", "https://example.com/e2e/exec.git"},
+		{"-c", "user.name=e2e", "-c", "[email protected]", "commit", "-q", "--allow-empty", "-m", "init"},
+	} {
+		if out, err := exec.CommandContext(ctx, "git", append([]string{"-C", workdir}, args...)...).CombinedOutput(); err != nil {
+			t.Fatalf("git %v: %v\n%s", args, err, out)
+		}
+	}
+
+	args := []string{"exec", "--json", "-C", workdir, "-W", workflows, "--artifact-server-path", t.TempDir(), "--artifact-server-port", "0"}
+	env := slices.DeleteFunc(os.Environ(), func(kv string) bool { return strings.HasPrefix(kv, "ACTIONS_") })
+	if m.kubernetes {
+		cluster := requireCluster(t)
+		args = append(args, "-i", "kubernetes://"+cluster.jobImage)
+		env = append(env, "KUBECONFIG="+cluster.kubernetes.Kubeconfig)
+	} else {
+		args = append(args, "-i", os.Getenv("E2E_JOB_IMAGE"), "--network", fixture.network)
+	}
+	if spec.inputs != nil {
+		args = append(args, "-E", "workflow_dispatch")
+		for name, value := range spec.inputs {
+			args = append(args, "--input", name+"="+value)
+		}
+	}
+	cmd := exec.CommandContext(ctx, bin, append(args, spec.execArgs...)...)
+	cmd.Env = env
+	var stdout, stderr bytes.Buffer
+	cmd.Stdout, cmd.Stderr = &stdout, &stderr
+	runErr := cmd.Run()
+	var exitErr *exec.ExitError
+	if runErr != nil && !errors.As(runErr, &exitErr) {
+		t.Fatalf("exec: %v\n%s", runErr, stderr.String())
+	}
+
+	result := &workflowResult{conclusion: "success", jobs: map[string]string{}}
+	if runErr != nil {
+		result.conclusion = "failure"
+	}
+	scanner := bufio.NewScanner(&stdout)
+	scanner.Buffer(nil, 1<<20)
+	for scanner.Scan() {
+		var entry struct {
+			JobID     string `json:"jobID"`
+			JobResult string `json:"jobResult"`
+			Msg       string `json:"msg"`
+			RawOutput bool   `json:"raw_output"`
+		}
+		if json.Unmarshal(scanner.Bytes(), &entry) != nil {
+			continue
+		}
+		if entry.JobResult != "" {
+			result.jobs[entry.JobID] = entry.JobResult
+		}
+		if entry.RawOutput {
+			for line := range strings.SplitSeq(strings.TrimRight(entry.Msg, "\n"), "\n") {
+				result.lines = append(result.lines, strings.TrimRight(line, "\r"))
+			}
+		}
+	}
+	if result.conclusion != "success" && len(result.jobs) == 0 {
+		t.Fatalf("exec ran no job: %v\n%s", runErr, stderr.String())
+	}
+	return result
+}

e2e/reconnect_test.go

@@ -0,0 +1,138 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+// flakyProxy forwards TCP to Gitea and can drop every connection to simulate an outage.
+type flakyProxy struct {
+	ln      net.Listener
+	target  string
+	down    atomic.Bool
+	refused atomic.Int64
+	mu      sync.Mutex
+	conns   map[net.Conn]struct{}
+}
+
+func newFlakyProxy(t *testing.T, targetURL string) *flakyProxy {
+	t.Helper()
+	u, err := url.Parse(targetURL)
+	if err != nil {
+		t.Fatalf("parse %q: %v", targetURL, err)
+	}
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("listen: %v", err)
+	}
+	p := &flakyProxy{ln: ln, target: u.Host, conns: map[net.Conn]struct{}{}}
+	go p.serve()
+	t.Cleanup(func() {
+		_ = ln.Close()
+		p.dropAll()
+	})
+	return p
+}
+
+func (p *flakyProxy) URL() string { return "http://" + p.ln.Addr().String() }
+
+func (p *flakyProxy) serve() {
+	for {
+		c, err := p.ln.Accept()
+		if err != nil {
+			return
+		}
+		if p.down.Load() {
+			p.refused.Add(1)
+			_ = c.Close()
+			continue
+		}
+		up, err := net.Dial("tcp", p.target)
+		if err != nil {
+			_ = c.Close()
+			continue
+		}
+		p.mu.Lock()
+		p.conns[c], p.conns[up] = struct{}{}, struct{}{}
+		p.mu.Unlock()
+		go func() { _, _ = io.Copy(up, c); _ = up.Close() }()
+		go func() { _, _ = io.Copy(c, up); _ = c.Close() }()
+	}
+}
+
+func (p *flakyProxy) dropAll() {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	for c := range p.conns {
+		_ = c.Close()
+	}
+	clear(p.conns)
+}
+
+// cut starts the outage and returns once the runner has been refused at least refusals more times.
+func (p *flakyProxy) cut(t *testing.T, refusals int64) {
+	t.Helper()
+	before := p.refused.Load()
+	p.down.Store(true)
+	p.dropAll()
+	deadline := time.Now().Add(30 * time.Second)
+	for p.refused.Load() < before+refusals {
+		if time.Now().After(deadline) {
+			t.Fatal("runner never retried during the outage")
+		}
+		time.Sleep(pollInterval)
+	}
+}
+
+func (p *flakyProxy) restore() { p.down.Store(false) }
+
+// testReconnect checks that a runner recovers from a lost connection to Gitea, idle or mid-job.
+func testReconnect(t *testing.T) {
+	t.Parallel()
+	api, repo := newScenario(t)
+	gate, release := newGate(t)
+	if err := api.CreateVariable(t.Context(), repo, "E2E_GATE", gate); err != nil {
+		t.Fatalf("create gate variable: %v", err)
+	}
+	proxy := newFlakyProxy(t, fixture.baseURL)
+	startRunner(t, repo, "e2e-reconnect", runnerOptions{host: true, address: proxy.URL()})
+
+	proxy.cut(t, 2)
+	pushWorkflow(t, api, repo, "reconnect_idle.yml")
+	idle := waitForRun(t, api, repo)
+	proxy.restore()
+	requireSuccess(t, api, repo, idle.ID)
+
+	pushWorkflow(t, api, repo, "reconnect.yml")
+	slow := waitForRunAfter(t, api, repo, idle.ID)
+	waitForRunningJobLog(t, api, repo, slow.ID, "e2e-before-outage", 1)
+	// the job logs a line every 200ms until released, so the outage spans several that can only arrive after it
+	proxy.cut(t, 8)
+	proxy.restore()
+	release()
+	requireSuccess(t, api, repo, slow.ID)
+	logs := runLogs(t, api, repo, slow.ID)
+	ticks, err := strconv.Atoi(strings.TrimPrefix(commandRow(logs, "ticks="), "ticks="))
+	if err != nil {
+		t.Fatalf("the job did not report its tick count: %v\n%s", err, logs)
+	}
+	for i := 1; i <= ticks; i++ {
+		if tick := fmt.Sprintf("tick-%d", i); commandRow(logs, tick) != tick {
+			t.Errorf("log line %s written during or after the outage was lost:\n%s", tick, logs)
+			break
+		}
+	}
+}

e2e/reusable_test.go

@@ -0,0 +1,19 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import "testing"
+
+// testReusableWorkflow runs a local workflow_call workflow and consumes its output.
+func testReusableWorkflow(t *testing.T, m mode) {
+	result := runWorkflow(t, m, workflowSpec{
+		files:    []string{"reusable_callee.yml", "reusable_caller.yml"},
+		execArgs: []string{"--no-skip-checkout"},
+	})
+	if result.conclusion != "success" || !result.hasLine("e2e-reusable-ran") {
+		t.Errorf("run concluded %q, want success with the called workflow's marker", result.conclusion)
+	}
+}

e2e/runner_harness.go

@@ -30,11 +30,16 @@ type runnerOptions struct {
 	cacheHost  string
 	image      string
 	kubernetes *config.Kubernetes
+	host       bool   // register a host-mode label instead of a docker one
+	name       string // suffix that keeps runner names unique when a test starts several
+	address    string // Gitea address the runner talks to, default the fixture
+	timeout    time.Duration
 }
 
 func startRunner(t *testing.T, repo, labelName string, options runnerOptions) *poll.Poller {
 	t.Helper()
 	ctx := t.Context()
+	address := cmp.Or(options.address, fixture.baseURL)
 	token, err := fixture.RegistrationToken(ctx, repo)
 	if err != nil {
 		t.Fatalf("get registration token: %v", err)
@@ -56,28 +61,31 @@ func startRunner(t *testing.T, repo, labelName string, options runnerOptions) *p
 	cfg.Runner.StateReportInterval = 500 * time.Millisecond // so cancel reaches the job quickly
 	cfg.Runner.LogReportInterval = 500 * time.Millisecond
 	cfg.Runner.Capacity = max(options.capacity, 1)
-	if fixture.network != "" {
-		cfg.Container.Network = fixture.network
-	}
+	cfg.Runner.Timeout = cmp.Or(options.timeout, cfg.Runner.Timeout)
+	cfg.Container.Network = fixture.network
 
 	scheme := labels.SchemeDocker
 	if options.kubernetes != nil {
 		scheme, cfg.Kubernetes = labels.SchemeKubernetes, *options.kubernetes
 	}
 	rawLabel := labelName + ":" + scheme + "://" + cmp.Or(options.image, os.Getenv("E2E_JOB_IMAGE"))
+	if options.host {
+		rawLabel = labelName + ":" + labels.SchemeHost
+		cfg.Host.WorkdirParent = t.TempDir()
+	}
 	label, err := labels.Parse(rawLabel)
 	if err != nil {
 		t.Fatalf("parse label %q: %v", rawLabel, err)
 	}
 	labelNames := []string{label.Name}
 
-	pingCli := client.New(fixture.baseURL, cfg.Runner.TLSConfig(), "", "", config.RequestTimeout, cfg.Runner.ExtraHeaders)
-	if _, err := pingCli.Ping(ctx, &pingv1.PingRequest{Data: t.Name()}); err != nil {
-		t.Fatalf("ping %s: %v", fixture.baseURL, err)
+	pingCli := client.New(address, cfg.Runner.TLSConfig(), "", "", config.RequestTimeout, cfg.Runner.ExtraHeaders)
+	if _, err := pingCli.Ping(ctx, &pingv1.PingRequest{Data: t.Name() + options.name}); err != nil {
+		t.Fatalf("ping %s: %v", address, err)
 	}
 
 	regResp, err := pingCli.Register(ctx, &runnerv1.RegisterRequest{
-		Name:         t.Name(),
+		Name:         t.Name() + options.name,
 		Token:        token,
 		Version:      "e2e",
 		Labels:       labelNames,
@@ -96,12 +104,12 @@ func startRunner(t *testing.T, repo, labelName string, options runnerOptions) *p
 		UUID:      regResp.Runner.Uuid,
 		Name:      regResp.Runner.Name,
 		Token:     regResp.Runner.Token,
-		Address:   fixture.baseURL,
+		Address:   address,
 		Labels:    []string{rawLabel},
 		Ephemeral: regResp.Runner.Ephemeral,
 	}
 
-	cli := client.New(fixture.baseURL, cfg.Runner.TLSConfig(), reg.UUID, reg.Token, config.RequestTimeout, cfg.Runner.ExtraHeaders)
+	cli := client.New(address, cfg.Runner.TLSConfig(), reg.UUID, reg.Token, config.RequestTimeout, cfg.Runner.ExtraHeaders)
 
 	runner := run.NewRunner(cfg, reg, cli)
 	if _, err := runner.Declare(ctx, labelNames); err != nil {

e2e/scheduling_test.go

@@ -0,0 +1,119 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build e2e
+
+package e2e
+
+import (
+	"context"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+)
+
+// testLabelRouting checks that each job reaches the runner owning its label and that a
+// job with no matching runner stays queued.
+func testLabelRouting(t *testing.T) {
+	t.Parallel()
+	ctx := t.Context()
+
+	api, repo := newScenario(t)
+	startRunner(t, repo, "e2e-route-a", runnerOptions{host: true, name: "-a"})
+	startRunner(t, repo, "e2e-route-b", runnerOptions{host: true, name: "-b"})
+	pushWorkflow(t, api, repo, "route.yml")
+
+	wfRun := waitForRun(t, api, repo)
+	ctx, cancel := context.WithTimeout(ctx, runTimeout)
+	defer cancel()
+	var jobs map[string]ActionJob
+	for {
+		list, err := api.Jobs(ctx, repo, wfRun.ID)
+		if err != nil {
+			t.Fatalf("list jobs: %v", err)
+		}
+		jobs = map[string]ActionJob{}
+		for _, job := range list {
+			jobs[job.Name] = job
+		}
+		if jobs["a"].Status == "completed" && jobs["b"].Status == "completed" {
+			break
+		}
+		select {
+		case <-ctx.Done():
+			t.Fatalf("jobs a and b did not complete: %+v", list)
+		case <-time.After(pollInterval):
+		}
+	}
+
+	for name, suffix := range map[string]string{"a": "-a", "b": "-b"} {
+		if got := jobs[name].RunnerName; !strings.HasSuffix(got, suffix) {
+			t.Errorf("job %s ran on runner %q, want the one named *%s", name, got, suffix)
+		}
+		if jobs[name].Conclusion != "success" {
+			t.Errorf("job %s concluded %q", name, jobs[name].Conclusion)
+		}
+	}
+	// a and b were picked up after unmatched was queued, so a runner that could take it would have by now
+	if status := jobs["unmatched"].Status; status == "in_progress" || status == "completed" {
+		t.Errorf("job with no matching runner is %q, want it queued", status)
+	}
+}
+
+// testCapacity checks that runner.capacity bounds how many jobs run at once.
+func testCapacity(t *testing.T) {
+	t.Parallel()
+	for _, tc := range []struct {
+		name       string
+		capacity   int
+		concurrent bool
+	}{
+		{"serial", 1, false},
+		{"parallel", 2, true},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			api, repo := newScenario(t)
+			gate, release := newGate(t)
+			if err := api.CreateVariable(t.Context(), repo, "E2E_GATE", gate); err != nil {
+				t.Fatalf("create gate variable: %v", err)
+			}
+			startRunner(t, repo, "e2e-capacity", runnerOptions{capacity: tc.capacity})
+			pushWorkflow(t, api, repo, "capacity.yml")
+
+			wfRun := waitForRun(t, api, repo)
+			waitForRunningJobLog(t, api, repo, wfRun.ID, "span-start=", tc.capacity)
+			release()
+			requireSuccess(t, api, repo, wfRun.ID)
+
+			jobs, err := api.Jobs(t.Context(), repo, wfRun.ID)
+			if err != nil || len(jobs) != 2 {
+				t.Fatalf("list jobs: %v (%d jobs)", err, len(jobs))
+			}
+			var start, end [2]int64
+			for i, job := range jobs {
+				logs, err := api.JobLogs(t.Context(), repo, job.ID)
+				if err != nil {
+					t.Fatalf("job logs: %v", err)
+				}
+				start[i] = spanValue(t, logs, "span-start=")
+				end[i] = spanValue(t, logs, "span-end=")
+			}
+			overlap := max(start[0], start[1]) < min(end[0], end[1])
+			if overlap != tc.concurrent {
+				t.Errorf("capacity %d: jobs overlapped=%v, want %v (starts %v ends %v)", tc.capacity, overlap, tc.concurrent, start, end)
+			}
+		})
+	}
+}
+
+func spanValue(t *testing.T, logs, prefix string) int64 {
+	t.Helper()
+	row := commandRow(logs, prefix)
+	n, err := strconv.ParseInt(strings.TrimPrefix(row, prefix), 10, 64)
+	if err != nil {
+		t.Fatalf("no %q value in logs:\n%s", prefix, logs)
+	}
+	return n
+}

e2e/testdata/workflows/capacity.yml

@@ -0,0 +1,17 @@
+name: capacity
+on: push
+jobs:
+  one:
+    runs-on: e2e-capacity
+    steps:
+      - run: |
+          echo "span-start=$(date +%s%N)"
+          until curl -fs "${{ vars.E2E_GATE }}" > /dev/null; do sleep 0.1; done
+          echo "span-end=$(date +%s%N)"
+  two:
+    runs-on: e2e-capacity
+    steps:
+      - run: |
+          echo "span-start=$(date +%s%N)"
+          until curl -fs "${{ vars.E2E_GATE }}" > /dev/null; do sleep 0.1; done
+          echo "span-end=$(date +%s%N)"

e2e/testdata/workflows/cli.yml

@@ -0,0 +1,7 @@
+name: cli
+on: push
+jobs:
+  hello:
+    runs-on: e2e-cli
+    steps:
+      - run: echo e2e-cli-job-ran

e2e/testdata/workflows/cli_labels.yml

@@ -0,0 +1,7 @@
+name: cli-labels
+on: push
+jobs:
+  hello:
+    runs-on: e2e-override
+    steps:
+      - run: echo e2e-override-ran

e2e/testdata/workflows/cli_once.yml

@@ -0,0 +1,11 @@
+name: cli-once
+on: push
+jobs:
+  first:
+    runs-on: e2e-once
+    steps:
+      - run: echo e2e-once-first
+  second:
+    runs-on: e2e-once
+    steps:
+      - run: echo e2e-once-second

e2e/testdata/workflows/cli_shutdown.yml

@@ -0,0 +1,10 @@
+name: cli-shutdown
+on: push
+jobs:
+  slow:
+    runs-on: e2e-shutdown
+    steps:
+      - run: |
+          echo e2e-shutdown-started
+          until curl -fs "${{ vars.E2E_GATE }}" > /dev/null; do sleep 0.1; done
+          echo e2e-shutdown-finished

e2e/testdata/workflows/exec_artifact.yml

@@ -0,0 +1,15 @@
+on: push
+jobs:
+  roundtrip:
+    runs-on: ubuntu-latest
+    steps:
+      - run: mkdir -p out && echo exec-payload > out/data.txt
+      - uses: actions/upload-artifact@v7
+        with:
+          name: exec-artifact
+          path: out/data.txt
+      - uses: actions/download-artifact@v8
+        with:
+          name: exec-artifact
+          path: got
+      - run: grep -q exec-payload got/data.txt

e2e/testdata/workflows/failure.yml

@@ -0,0 +1,23 @@
+name: failure
+on: push
+jobs:
+  fail:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo e2e-before-fail
+      - run: exit 3
+      - if: success()
+        run: echo e2e-skipped-step
+      - if: failure()
+        run: echo e2e-failure-cleanup
+  tolerated:
+    runs-on: ubuntu-latest
+    steps:
+      - continue-on-error: true
+        run: exit 1
+      - run: echo e2e-tolerated-next
+  dependent:
+    needs: fail
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo dependent

e2e/testdata/workflows/host.yml

@@ -0,0 +1,10 @@
+name: host
+on: push
+jobs:
+  host:
+    runs-on: e2e-host
+    steps:
+      - run: |
+          test "$(hostname)" = "${{ vars.E2E_HOSTNAME }}"
+          test -n "$GITHUB_WORKSPACE"
+          echo e2e-host-job-ran

e2e/testdata/workflows/reconnect.yml

@@ -0,0 +1,18 @@
+name: reconnect
+on:
+  push:
+    paths:
+      - .gitea/workflows/reconnect.yml
+jobs:
+  slow:
+    runs-on: e2e-reconnect
+    steps:
+      - run: |
+          echo e2e-before-outage
+          i=0
+          until curl -fs "${{ vars.E2E_GATE }}" > /dev/null; do
+            i=$((i + 1))
+            echo "tick-$i"
+            sleep 0.2
+          done
+          echo "ticks=$i"

e2e/testdata/workflows/reconnect_idle.yml

@@ -0,0 +1,10 @@
+name: reconnect-idle
+on:
+  push:
+    paths:
+      - .gitea/workflows/reconnect_idle.yml
+jobs:
+  hello:
+    runs-on: e2e-reconnect
+    steps:
+      - run: echo e2e-idle-recovered

e2e/testdata/workflows/reusable_callee.yml

@@ -0,0 +1,20 @@
+name: reusable-callee
+on:
+  workflow_call:
+    inputs:
+      who:
+        type: string
+        required: true
+    outputs:
+      greeting:
+        value: ${{ jobs.say.outputs.greeting }}
+jobs:
+  say:
+    runs-on: ubuntu-latest
+    outputs:
+      greeting: ${{ steps.greet.outputs.greeting }}
+    steps:
+      - id: greet
+        run: |
+          echo "greeting=hello-${{ inputs.who }}" >> "$GITHUB_OUTPUT"
+          echo e2e-reusable-ran

e2e/testdata/workflows/reusable_caller.yml

@@ -0,0 +1,12 @@
+name: reusable-caller
+on: push
+jobs:
+  call:
+    uses: ./.gitea/workflows/reusable_callee.yml
+    with:
+      who: e2e
+  verify:
+    needs: call
+    runs-on: ubuntu-latest
+    steps:
+      - run: test "${{ needs.call.outputs.greeting }}" = "hello-e2e"

e2e/testdata/workflows/route.yml

@@ -0,0 +1,15 @@
+name: route
+on: push
+jobs:
+  a:
+    runs-on: e2e-route-a
+    steps:
+      - run: echo route-a
+  b:
+    runs-on: e2e-route-b
+    steps:
+      - run: echo route-b
+  unmatched:
+    runs-on: e2e-route-none
+    steps:
+      - run: echo route-none

e2e/testdata/workflows/timeout.yml

@@ -0,0 +1,9 @@
+name: timeout
+on: push
+jobs:
+  timeout:
+    runs-on: e2e-timeout
+    steps:
+      - run: |
+          echo e2e-timeout-started
+          sleep 300

go.mod

@@ -5,9 +5,9 @@ go 1.27
 toolchain go1.27.3
 
 require (
-	connectrpc.com/connect/v2 v2.0.1
-	gitea.dev/actionslib v1.5.0
-	github.com/bmatcuk/doublestar/v4 v4.10.3
+	connectrpc.com/connect/v2 v2.0.2
+	gitea.dev/actionslib v1.5.1
+	github.com/bmatcuk/doublestar/v4 v4.10.4
 	github.com/coder/websocket v1.8.15
 	github.com/containerd/errdefs v1.0.0
 	github.com/creack/pty v1.1.24
@@ -33,7 +33,7 @@ require (
 	go.opentelemetry.io/otel/trace v1.47.0
 	go.opentelemetry.io/proto/otlp v1.11.1
 	go.yaml.in/yaml/v4 v4.0.0-rc.6.0.20261013184558-04dd63131525
-	golang.org/x/net v0.61.0
+	golang.org/x/net v0.62.0
 	golang.org/x/sync v0.24.0
 	golang.org/x/sys v0.49.0
 	golang.org/x/term v0.47.0

go.sum

@@ -1,13 +1,13 @@
-connectrpc.com/connect/v2 v2.0.1 h1:WTAycxe87UqxSM5oxS30d1dalZ+C5xz8Ec8O6zVYkHQ=
-connectrpc.com/connect/v2 v2.0.1/go.mod h1:N32OLrstcPUzkykFynnefFro3+xzSdOrZlK2jHmS/xo=
-gitea.dev/actionslib v1.5.0 h1:dC3v2HTWbbvyNBSdg2W3kd4WNC/p+FnZaKpl1MdzM00=
-gitea.dev/actionslib v1.5.0/go.mod h1:C9wmOFgDBCXyRvg4A3KTX8Vszs8v9+elH4QLGVDolqU=
+connectrpc.com/connect/v2 v2.0.2 h1:PoPDmOlhc46elsuCdKCKTxjNBb3HJlKF+s/sP2oucPw=
+connectrpc.com/connect/v2 v2.0.2/go.mod h1:N32OLrstcPUzkykFynnefFro3+xzSdOrZlK2jHmS/xo=
+gitea.dev/actionslib v1.5.1 h1:QVOaENNWx4EFRlZvrWmMTKaKLbaqxdlhWLtsI4kf2v8=
+gitea.dev/actionslib v1.5.1/go.mod h1:C9wmOFgDBCXyRvg4A3KTX8Vszs8v9+elH4QLGVDolqU=
 github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bmatcuk/doublestar/v4 v4.10.3 h1:1UIv1+fqH3++ViVkpnaPTB+Pi1UHycnPFAq14zgK+gI=
-github.com/bmatcuk/doublestar/v4 v4.10.3/go.mod h1:xBQ8jztBU6kakFMg+8WGxn0c6z1fTSPVIjEY1Wr7jzc=
+github.com/bmatcuk/doublestar/v4 v4.10.4 h1:oTKkRmRuOsKMqFe1AQazd9gGBFNEpOmgKp/xzB97dnA=
+github.com/bmatcuk/doublestar/v4 v4.10.4/go.mod h1:xBQ8jztBU6kakFMg+8WGxn0c6z1fTSPVIjEY1Wr7jzc=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/coder/websocket v1.8.15 h1:6B2JPeOGlpff2Uz6vOEH1Vzpi0iUz20A+lPVhPHtNUA=
@@ -111,8 +111,8 @@ go.yaml.in/yaml/v3 v3.0.5 h1:N6y/pJk8buWs9NY5ERU2HSMfm+IuD/OtfdAnq6kESPw=
 go.yaml.in/yaml/v3 v3.0.5/go.mod h1:HVTZu1O7/Vkt2N+BFy8Zza+lnLsABggaTM2ZpNIGuKg=
 go.yaml.in/yaml/v4 v4.0.0-rc.6.0.20261013184558-04dd63131525 h1:FtzHH3s777Nx50YcPAcodAPm1mNakc228nMYbr3f+90=
 go.yaml.in/yaml/v4 v4.0.0-rc.6.0.20261013184558-04dd63131525/go.mod h1:aZqd9kCMsGL7AuUv/m/PvWLdg5sjJsZ4oHDEnfPPfY0=
-golang.org/x/net v0.61.0 h1:RR+6j/BTBCrggOLugxa+66R8FvoN6MHlzDlZIbN9YFw=
-golang.org/x/net v0.61.0/go.mod h1:WgDCOTH8iwtB66T4/GfI94AHo/hhdb7Hah9NDseQfiI=
+golang.org/x/net v0.62.0 h1:18ELalfM5+XNRwzM2nYqXsZQ9ByS1uhj2O/U7+5jqRY=
+golang.org/x/net v0.62.0/go.mod h1:WgDCOTH8iwtB66T4/GfI94AHo/hhdb7Hah9NDseQfiI=
 golang.org/x/sync v0.24.0 h1:iqiDrGoDgyuvAKrhLQthUEzU/R378N78gXbBjxed7oA=
 golang.org/x/sync v0.24.0/go.mod h1:sUUOizhqBxiL6pEWpqNLUiaJn1ShEbZ6BBqskPbjZm0=
 golang.org/x/sys v0.49.0 h1:XbzkgYJHdqh/8m2Uu0W/dQv8nktxx4BFHp1M0gROTXA=

internal/app/cmd/cmd.go

@@ -58,6 +58,9 @@ func Execute(ctx context.Context) {
 	// ./gitea-runner bug-report
 	rootCmd.AddCommand(loadBugReportCmd())
 
+	// ./gitea-runner kubernetes-transfer, run inside Kubernetes job pods
+	rootCmd.AddCommand(loadKubernetesTransferCmd())
+
 	// ./gitea-runner config
 	rootCmd.AddCommand(loadConfigCmd(&configFile))
 

internal/app/cmd/exec.go

@@ -7,12 +7,11 @@ package cmd
 import (
 	"cmp"
 	"context"
-	"crypto/rand"
-	"encoding/hex"
 	"encoding/json/v2"
 	"errors"
 	"fmt"
 	"maps"
+	"net"
 	"os"
 	"path/filepath"
 	"slices"
@@ -481,24 +480,7 @@ func runExec(ctx context.Context, execArgs *executeArgs) func(cmd *cobra.Command
 			execArgs.artifactServerPath = tempDir
 		}
 
-		// Register ACTIONS_RUNTIME_TOKEN against local cache server
 		env := execArgs.LoadEnvs()
-		const actionsRuntimeTokenEnvName = "ACTIONS_RUNTIME_TOKEN"
-		actionsRuntimeToken := env[actionsRuntimeTokenEnvName]
-		if actionsRuntimeToken == "" {
-			actionsRuntimeToken = os.Getenv(actionsRuntimeTokenEnvName)
-		}
-		if actionsRuntimeToken == "" {
-			tmpBranch := make([]byte, 12)
-			if _, err := rand.Read(tmpBranch); err != nil {
-				actionsRuntimeToken = "token"
-			} else {
-				actionsRuntimeToken = hex.EncodeToString(tmpBranch)
-			}
-			env[actionsRuntimeTokenEnvName] = actionsRuntimeToken
-			os.Setenv(actionsRuntimeTokenEnvName, actionsRuntimeToken)
-		}
-		handler.RegisterJob(actionsRuntimeToken, artifactcache.JobCredential{Repo: "__local/__exec"})
 
 		// no service aliases: exec builds one config for the whole plan
 		run.BypassProxyForDockerHost(os.Getenv("DOCKER_HOST"))
@@ -517,7 +499,22 @@ func runExec(ctx context.Context, execArgs *executeArgs) func(cmd *cobra.Command
 		}
 
 		config.Env["ACT_EXEC"] = "true"
-		config.Secrets[actionsRuntimeTokenEnvName] = actionsRuntimeToken
+		inheritedToken := cmp.Or(env["ACTIONS_RUNTIME_TOKEN"], os.Getenv("ACTIONS_RUNTIME_TOKEN"))
+		config.RuntimeTokens = map[*model.Workflow]string{}
+		sameFile := map[string]int{}
+		for _, stage := range plan.Stages {
+			for _, run := range stage.Runs {
+				if config.RuntimeTokens[run.Workflow] != "" {
+					continue
+				}
+				sameFile[run.Workflow.File]++
+				workflowRun := fmt.Sprintf("%s/%s/%d", cmp.Or(env["GITHUB_RUN_ID"], "1"), run.Workflow.File, sameFile[run.Workflow.File]) // each workflow its own run as on GitHub, also when file names repeat across directories
+				token := cmp.Or(inheritedToken, artifacts.LocalRuntimeToken(workflowRun, maxLifetime))
+				config.RuntimeTokens[run.Workflow] = token
+				config.ExtraMasks = append(config.ExtraMasks, token)
+				handler.RegisterJob(token, artifactcache.JobCredential{Repo: "__local/__exec", Results: "http://" + net.JoinHostPort(execArgs.artifactServerAddr, execArgs.artifactServerPort)})
+			}
+		}
 
 		config.Token = cmp.Or(config.Secrets["GITEA_TOKEN"], config.Secrets["GITHUB_TOKEN"])
 
@@ -580,9 +577,9 @@ func loadExecCmd(ctx context.Context) *cobra.Command {
 	execCmd.Flags().StringArrayVarP(&execArg.containerCapAdd, "container-cap-add", "", []string{}, "kernel capabilities to add to the workflow containers (e.g. --container-cap-add SYS_PTRACE)")
 	execCmd.Flags().StringArrayVarP(&execArg.containerCapDrop, "container-cap-drop", "", []string{}, "kernel capabilities to remove from the workflow containers (e.g. --container-cap-drop SYS_PTRACE)")
 	execCmd.Flags().StringVarP(&execArg.containerOptions, "container-opts", "", "", "container options")
-	execCmd.PersistentFlags().StringVarP(&execArg.artifactServerPath, "artifact-server-path", "", ".", "Defines the path where the artifact server stores uploads and retrieves downloads from. If not specified the artifact server will not start.")
+	execCmd.PersistentFlags().StringVarP(&execArg.artifactServerPath, "artifact-server-path", "", "", "Defines the path where the artifact server stores uploads and retrieves downloads from, outside the workspace that jobs copy. Defaults to a temporary directory removed on exit.")
 	execCmd.PersistentFlags().StringVarP(&execArg.artifactServerAddr, "artifact-server-addr", "", "", "Defines the address where the artifact server listens")
-	execCmd.PersistentFlags().StringVarP(&execArg.artifactServerPort, "artifact-server-port", "", "34567", "Defines the port where the artifact server listens (will only bind to localhost).")
+	execCmd.PersistentFlags().StringVarP(&execArg.artifactServerPort, "artifact-server-port", "", "34567", "Defines the port where the artifact server listens")
 	execCmd.PersistentFlags().StringVarP(&execArg.defaultActionsURL, "default-actions-url", "", "https://github.com", "Defines the default url of action instance.")
 	execCmd.PersistentFlags().BoolVarP(&execArg.noSkipCheckout, "no-skip-checkout", "", false, "Do not skip actions/checkout")
 	execCmd.PersistentFlags().BoolVarP(&execArg.debug, "debug", "d", false, "enable debug log")

internal/app/cmd/kubernetes-transfer.go

@@ -0,0 +1,35 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package cmd
+
+import (
+	"gitea.com/gitea/runner/act/container"
+
+	"github.com/spf13/cobra"
+)
+
+// loadKubernetesTransferCmd is what job pods run when kubernetes.transfer is on: the init container installs the binary, the job container fetches with it.
+func loadKubernetesTransferCmd() *cobra.Command {
+	transferCmd := &cobra.Command{
+		Use:    container.KubernetesTransferCommand,
+		Short:  "Copy files from the runner into a Kubernetes job pod",
+		Hidden: true,
+	}
+	transferCmd.AddCommand(&cobra.Command{
+		Use:   "install <path>",
+		Short: "Copy this binary to path",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(_cmd *cobra.Command, args []string) error {
+			return container.InstallKubernetesTransferHelper(args[0])
+		},
+	}, &cobra.Command{
+		Use:   "fetch <dir>",
+		Short: "Extract the tar stream the transfer request on stdin points to into dir",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return container.FetchKubernetesTransfer(cmd.Context(), cmd.InOrStdin(), args[0])
+		},
+	})
+	return transferCmd
+}

internal/app/run/runner.go

@@ -415,6 +415,11 @@ func (r *Runner) kubernetesOptions(runsOn []string) container.KubernetesOptions
 		PodTemplates: []map[string]any{r.cfg.Kubernetes.PodTemplate},
 		RunnerUUID:   r.uuid,
 	}
+	if transfer := r.cfg.Kubernetes.Transfer; transfer.Mode == config.KubernetesTransferModeAuto || transfer.Mode == config.KubernetesTransferModeDirect {
+		options.Transfer = &container.KubernetesTransfer{
+			Host: transfer.Host, Port: transfer.Port, Image: transfer.Image, Fallback: transfer.Mode == config.KubernetesTransferModeAuto,
+		}
+	}
 	names := r.labels.Names()
 	for index, name := range runsOn {
 		if template, ok := r.cfg.Kubernetes.PodTemplates[name]; ok && slices.Contains(names, name) && !slices.Contains(runsOn[:index], name) {
@@ -533,7 +538,7 @@ func (r *Runner) run(ctx context.Context, task *runnerv1.Task, reporter *report.
 	// is removed when the task finishes, so a leaked token stops working as
 	// soon as the job ends rather than remaining valid for the runner's
 	// lifetime.
-	revokeCache, resultsURL := r.registerCacheForTask(giteaRuntimeToken, preset.Repository, cacheURL, reporter)
+	revokeCache, resultsURL := r.registerCacheForTask(giteaRuntimeToken, cacheCredential(preset, cacheURL), reporter)
 	defer revokeCache()
 
 	eventJSON, err := json.Marshal(preset.Event)
@@ -690,34 +695,54 @@ func (r *Runner) instanceOutOfReach(instance string) bool {
 //
 // Safe with an empty token (older Gitea did not issue one).
 // It also returns the URL to advertise as ACTIONS_RESULTS_URL.
-func (r *Runner) registerCacheForTask(token, repo, publicURL string, reporter *report.Reporter) (func(), string) {
+func (r *Runner) registerCacheForTask(token string, cred artifactcache.JobCredential, reporter *report.Reporter) (func(), string) {
 	if token == "" || r.cacheHandler == nil {
 		return func() {}, ""
 	}
-	cred := artifactcache.JobCredential{
-		Repo:        repo,
-		PublicURL:   publicURL,
-		Results:     r.envs["ACTIONS_RESULTS_URL"], // the instance as the job would reach it
-		InsecureTLS: r.cfg.Runner.Insecure,
-	}
+	cred.Results = r.envs["ACTIONS_RESULTS_URL"] // the instance as the job would reach it
+	cred.InsecureTLS = r.cfg.Runner.Insecure
 	revoke := r.cacheHandler.RegisterJob(token, cred)
 	if r.cfg.Cache.ExternalServer != "" {
-		revokeLocal, revokeExternal := revoke, r.registerExternalCacheJob(token, repo, publicURL, reporter)
+		revokeLocal, revokeExternal := revoke, r.registerExternalCacheJob(token, cred, reporter)
 		revoke = func() { revokeLocal(); revokeExternal() }
 	}
 	return revoke, r.cacheHandler.ResultsURL(cred)
 }
 
+// cacheCredential scopes the job's cache entries by ref, as GitHub does.
+func cacheCredential(preset *model.GithubContext, publicURL string) artifactcache.JobCredential {
+	ref := preset.Ref
+	if strings.HasPrefix(preset.EventName, "pull_request") && preset.EventName != "pull_request_target" {
+		number, _ := preset.Event["number"].(float64)
+		ref = fmt.Sprintf("refs/pull/%d/head", int64(number)) // review events take github.ref from the reviewer's commit_id
+	}
+	return artifactcache.JobCredential{
+		Repo:       preset.Repository,
+		Ref:        ref,
+		BaseRef:    branchRef(preset.BaseRef),
+		DefaultRef: branchRef(model.AsString(model.NestedMapLookup(preset.Event, "repository", "default_branch"))),
+		PublicURL:  publicURL,
+	}
+}
+
+func branchRef(branch string) string {
+	if branch == "" {
+		return ""
+	}
+	return "refs/heads/" + branch
+}
+
 // registerExternalCacheJob POSTs to the remote cache-server's control-plane.
 // Failures are logged but not fatal: if registration fails, the cache will
 // 401 the job's requests — better than failing the whole task for a cache
 // outage. The warning is mirrored to the job log so users can see why their
 // cache calls 401, instead of having to read the runner daemon's stderr.
-func (r *Runner) registerExternalCacheJob(token, repo, publicURL string, reporter *report.Reporter) func() {
+func (r *Runner) registerExternalCacheJob(token string, cred artifactcache.JobCredential, reporter *report.Reporter) func() {
 	base := strings.TrimRight(r.cfg.Cache.ExternalServer, "/")
-	if err := postInternalCache(base+"/_internal/register", r.cfg.Cache.ExternalSecret, map[string]any{
-		"token": token, "repo": repo, "public_url": publicURL,
-	}); err != nil {
+	if err := postInternalCache(base+"/_internal/register", r.cfg.Cache.ExternalSecret, struct {
+		Token string `json:"token"`
+		artifactcache.JobCredential
+	}{token, cred}); err != nil {
 		logging.Warnf("cache external_server register failed (%s): %v", base, err)
 		if reporter != nil {
 			reporter.Logf("::warning::%s", runner.EscapeCommandData(fmt.Sprintf(
@@ -736,7 +761,7 @@ func (r *Runner) registerExternalCacheJob(token, repo, publicURL string, reporte
 	}
 }
 
-func postInternalCache(url, secret string, body map[string]any) error {
+func postInternalCache(url, secret string, body any) error {
 	buf, err := json.Marshal(body)
 	if err != nil {
 		return err

internal/app/run/runner_cache_test.go

@@ -17,6 +17,7 @@ import (
 	clientmocks "gitea.com/gitea/runner/internal/pkg/client/mocks"
 	"gitea.com/gitea/runner/internal/pkg/config"
 
+	"gitea.dev/actionslib/pkg/model"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -24,7 +25,7 @@ import (
 func TestRunner_registerCacheForTask_NoOps(t *testing.T) {
 	for token, handler := range map[string]*artifactcache.Handler{"tok": nil, "": {}} {
 		r := &Runner{cacheHandler: handler}
-		unregister, _ := r.registerCacheForTask(token, "owner/repo", "", nil)
+		unregister, _ := r.registerCacheForTask(token, artifactcache.JobCredential{Repo: "owner/repo"}, nil)
 		require.NotNil(t, unregister, token)
 		unregister()
 	}
@@ -39,7 +40,7 @@ func TestRunner_CacheFullFlow_MatchesToolkit(t *testing.T) {
 	r := &Runner{cfg: &config.Config{}, cacheHandler: handler, envs: map[string]string{"ACTIONS_RESULTS_URL": "https://gitea.example"}}
 	const publicURL = "http://a1b2c3d4e5f6:8088"
 	token := "full-flow-token"
-	unregister, resultsURL := r.registerCacheForTask(token, "owner/repo", publicURL, nil)
+	unregister, resultsURL := r.registerCacheForTask(token, artifactcache.JobCredential{Repo: "owner/repo", PublicURL: publicURL}, nil)
 	assert.Equal(t, publicURL, resultsURL)
 
 	base := handler.ExternalURL() + "/_apis/artifactcache"
@@ -112,6 +113,24 @@ func decodeJSON(resp *http.Response, v any) error {
 	return json.UnmarshalRead(resp.Body, v)
 }
 
+func TestCacheCredential(t *testing.T) {
+	repository := map[string]any{"default_branch": "main"}
+	review := &model.GithubContext{
+		Repository: "owner/repo", EventName: "pull_request_review", Ref: "refs/heads/main", BaseRef: "release",
+		Event: map[string]any{"repository": repository, "number": float64(3)},
+	}
+	assert.Equal(t, artifactcache.JobCredential{
+		Repo: "owner/repo", Ref: "refs/pull/3/head", BaseRef: "refs/heads/release", DefaultRef: "refs/heads/main", PublicURL: "http://cache",
+	}, cacheCredential(review, "http://cache"))
+
+	review.EventName, review.Ref = "pull_request_target", "refs/heads/release"
+	assert.Equal(t, "refs/heads/release", cacheCredential(review, "").Ref)
+
+	assert.Equal(t, artifactcache.JobCredential{
+		Repo: "owner/repo", Ref: "refs/heads/feature", DefaultRef: "refs/heads/main",
+	}, cacheCredential(&model.GithubContext{Repository: "owner/repo", Ref: "refs/heads/feature", Event: map[string]any{"repository": repository}}, ""))
+}
+
 func TestRunner_ExternalCacheServer_RegisterRevoke(t *testing.T) {
 	const secret = "shared-secret-for-tests"
 	remote, err := artifactcache.StartHandler(artifactcache.Options{Dir: t.TempDir(), OutboundIP: "127.0.0.1", InternalSecret: secret})
@@ -151,7 +170,7 @@ func TestRunner_ExternalCacheServer_RegisterRevoke(t *testing.T) {
 	require.Equal(t, http.StatusUnauthorized, probe(),
 		"token must be unknown to the remote server before registration")
 
-	unregister, resultsURL := r.registerCacheForTask(token, repo, publicURL, nil)
+	unregister, resultsURL := r.registerCacheForTask(token, artifactcache.JobCredential{Repo: repo, Ref: "refs/heads/main", PublicURL: publicURL}, nil)
 	require.NotEqual(t, http.StatusUnauthorized, probe(),
 		"token must be accepted after registerCacheForTask")
 
@@ -194,6 +213,12 @@ func TestRunner_ExternalCacheServer_RegisterRevoke(t *testing.T) {
 	require.NoError(t, decodeJSON(resp, &hit))
 	require.True(t, strings.HasPrefix(hit.ArchiveLocation, publicURL+"/"), hit.ArchiveLocation)
 
+	unregisterOther, _ := r.registerCacheForTask("external-other-token", artifactcache.JobCredential{Repo: repo, Ref: "refs/heads/other"}, nil)
+	defer unregisterOther()
+	resp = cacheRequest(t, "external-other-token", http.MethodGet, base+"/cache?keys=ext-key&version=v", "", "", "")
+	resp.Body.Close()
+	assert.Equal(t, http.StatusNoContent, resp.StatusCode, "the remote server must scope the entry by the ref the runner sent")
+
 	dl, err := http.Get(strings.Replace(hit.ArchiveLocation, publicURL, r.cacheHandler.ExternalURL(), 1))
 	require.NoError(t, err)
 	defer dl.Body.Close()

internal/app/run/runner_test.go

@@ -18,8 +18,10 @@ import (
 	"testing"
 	"time"
 
+	"gitea.com/gitea/runner/act/artifactcache"
 	"gitea.com/gitea/runner/act/common"
 	"gitea.com/gitea/runner/act/common/logging"
+	"gitea.com/gitea/runner/act/container"
 	"gitea.com/gitea/runner/act/runner"
 	clientmocks "gitea.com/gitea/runner/internal/pkg/client/mocks"
 	"gitea.com/gitea/runner/internal/pkg/config"
@@ -275,6 +277,17 @@ func TestRunnerKubernetesOptionsLayerTheLabelPodTemplatesInRunsOnOrder(t *testin
 	require.Equal(t, []map[string]any{{"base": true}, {"large": true}, {"gpu": true}}, r.kubernetesOptions([]string{"linux", "large", "other", "gpu", "large"}).PodTemplates)
 }
 
+func TestRunnerKubernetesOptionsTransfer(t *testing.T) {
+	kubernetesRunner := &Runner{cfg: &config.Config{}}
+	kubernetesRunner.cfg.Kubernetes.Transfer = config.KubernetesTransfer{Mode: config.KubernetesTransferModeAPI, Host: "10.0.0.5", Port: 4000, Image: "gitea/runner:latest"}
+	require.Nil(t, kubernetesRunner.kubernetesOptions(nil).Transfer)
+
+	kubernetesRunner.cfg.Kubernetes.Transfer.Mode = config.KubernetesTransferModeAuto
+	require.Equal(t, &container.KubernetesTransfer{Host: "10.0.0.5", Port: 4000, Image: "gitea/runner:latest", Fallback: true}, kubernetesRunner.kubernetesOptions(nil).Transfer)
+	kubernetesRunner.cfg.Kubernetes.Transfer.Mode = config.KubernetesTransferModeDirect
+	require.Equal(t, &container.KubernetesTransfer{Host: "10.0.0.5", Port: 4000, Image: "gitea/runner:latest"}, kubernetesRunner.kubernetesOptions(nil).Transfer)
+}
+
 // Proxy variables are assembled per task, because a job's service containers have to be
 // reached directly and they are only known once the workflow is parsed.
 func TestNewRunnerLeavesProxyToTheTask(t *testing.T) {
@@ -325,7 +338,7 @@ func TestNewRunnerCacheServiceV2(t *testing.T) {
 
 	// The registration is what makes it true: the cache server takes the results service over,
 	// having been told which instance to forward the artifact half to.
-	revoke, resultsURL := r.registerCacheForTask(token, "owner/repo", r.cacheHandler.ExternalURL(), nil)
+	revoke, resultsURL := r.registerCacheForTask(token, artifactcache.JobCredential{Repo: "owner/repo", PublicURL: r.cacheHandler.ExternalURL()}, nil)
 	defer revoke()
 	require.Equal(t, r.cacheHandler.ExternalURL(), resultsURL)
 

internal/pkg/config/config.example.yaml

@@ -306,6 +306,18 @@ kubernetes:
   #pod_template: {}
   # Pod templates merged over pod_template, in runs-on order, for jobs whose runs-on has the label they are keyed by.
   #pod_templates: {}
+  # Have job pods fetch directories, such as actions, and copies of 64 KiB or more gzipped from the runner over the pod network,
+  # instead of the runner streaming them through the API server. An init container copies gitea-runner from image into each job pod.
+  # api: through the API server (default). auto: over the pod network, through the API server for a job pod that
+  # cannot reach the runner. direct: over the pod network only, so a broken setup fails jobs instead of quietly
+  # costing API server traffic again.
+  #transfer:
+  #  mode: api
+  #  # Address and port the runner listens on and job pods reach it at, the outbound IP and a free port when empty.
+  #  host: ""
+  #  port: 0
+  #  # Image with gitea-runner on its PATH, the runner pod's image when it has a single container and runs in namespace.
+  #  image: ""
 
 # Optional local task-admission checks. Disabled by default. When enabled, low
 # disk space or a failing script pauses new task fetching; existing jobs continue.

internal/pkg/config/config.go

@@ -210,6 +210,25 @@ type Kubernetes struct {
 	Namespace    string                    `yaml:"namespace"`     // Namespace of job pods, empty uses the service account's, else the kubeconfig context's, else default.
 	PodTemplate  map[string]any            `yaml:"pod_template"`  // PodTemplate is a pod manifest the runner merges its own onto.
 	PodTemplates map[string]map[string]any `yaml:"pod_templates"` // PodTemplates are merged over PodTemplate, in runs-on order, for jobs whose runs-on has the label they are keyed by.
+	Transfer     KubernetesTransfer        `yaml:"transfer"`      // Transfer has job pods fetch copied files from the runner over the pod network instead of through the API server.
+}
+
+// Kubernetes transfer modes: how files the runner copies reach job pods.
+const (
+	KubernetesTransferModeAPI    = "api"    // through the API server
+	KubernetesTransferModeAuto   = "auto"   // over the pod network, through the API server for a job pod that cannot reach the runner
+	KubernetesTransferModeDirect = "direct" // over the pod network only, a copy that cannot reach the runner fails
+)
+
+// KubernetesTransferModes are the valid kubernetes.transfer.mode values.
+var KubernetesTransferModes = []string{KubernetesTransferModeAPI, KubernetesTransferModeAuto, KubernetesTransferModeDirect}
+
+// KubernetesTransfer configures copying files into job pods over the pod network.
+type KubernetesTransfer struct {
+	Mode  string `yaml:"mode"`  // Mode is one of KubernetesTransferModes, api when empty.
+	Host  string `yaml:"host"`  // Host is the address the runner listens on and job pods reach it at, empty uses the outbound IP.
+	Port  uint16 `yaml:"port"`  // Port the runner listens on for job pods, 0 picks a free one.
+	Image string `yaml:"image"` // Image has gitea-runner on its PATH, empty uses the image of a single-container runner pod.
 }
 
 // Metrics represents the configuration for the Prometheus metrics endpoint.
@@ -346,6 +365,12 @@ func LoadDefault(file string) (*Config, error) {
 	if !slices.Contains(ToolCacheModes, cfg.Runner.ToolCacheMode) {
 		return nil, fmt.Errorf("invalid runner.tool_cache_mode %q: must be one of %q", cfg.Runner.ToolCacheMode, ToolCacheModes)
 	}
+	if cfg.Kubernetes.Transfer.Mode == "" {
+		cfg.Kubernetes.Transfer.Mode = KubernetesTransferModeAPI
+	}
+	if !slices.Contains(KubernetesTransferModes, cfg.Kubernetes.Transfer.Mode) {
+		return nil, fmt.Errorf("invalid kubernetes.transfer.mode %q: must be one of %q", cfg.Kubernetes.Transfer.Mode, KubernetesTransferModes)
+	}
 	if cfg.Runner.LogReportLevel != "" {
 		if _, err := logging.ParseLevel(cfg.Runner.LogReportLevel); err != nil {
 			return nil, fmt.Errorf("invalid runner.log_report_level: %w", err)

internal/pkg/config/config_test.go

@@ -140,6 +140,19 @@ func TestLoadDefault_ToolCacheMode(t *testing.T) {
 	assert.Contains(t, err.Error(), "tool_cache_mode")
 }
 
+func TestLoadDefault_KubernetesTransferMode(t *testing.T) {
+	cfg, err := LoadDefault(write(t, "kubernetes:\n  transfer:\n    host: 10.0.0.5\n"))
+	require.NoError(t, err)
+	assert.Equal(t, KubernetesTransferModeAPI, cfg.Kubernetes.Transfer.Mode, "copies stay on the API server unless asked")
+
+	cfg, err = LoadDefault(write(t, "kubernetes:\n  transfer:\n    mode: direct\n"))
+	require.NoError(t, err)
+	assert.Equal(t, KubernetesTransferModeDirect, cfg.Kubernetes.Transfer.Mode)
+
+	_, err = LoadDefault(write(t, "kubernetes:\n  transfer:\n    mode: fast\n"))
+	require.ErrorContains(t, err, "kubernetes.transfer.mode")
+}
+
 func TestLoadDefault_RejectsInvalidLogReportLevel(t *testing.T) {
 	_, err := LoadDefault(write(t, "runner:\n  log_report_level: loud\n"))
 	require.ErrorContains(t, err, "runner.log_report_level")

internal/pkg/process/killer_unix_test.go

@@ -104,7 +104,7 @@ func TestTreeKillCancelBeforeCaptureKillsTree(t *testing.T) {
 	require.NoError(t, err)
 	t.Cleanup(func() { _ = stdin.Close() })
 	t.Cleanup(func() { _ = input.Close() })
-	cmd := exec.CommandContext(t.Context(), "/bin/sh", "-c", "cat <&0 & echo $!; read value")
+	cmd := exec.CommandContext(t.Context(), "/bin/sh", "-c", "exec 3<&0; cat <&3 & echo $!; read value")
 	cmd.Stdin = stdin
 	cmd.SysProcAttr = SysProcAttr("", false)
 	output, err := cmd.StdoutPipe()

scripts/s6/docker/run

@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 
-exec s6-notifyoncheck -n 0 dockerd-entrypoint.sh
+exec s6-notifyoncheck -d -n 0 dockerd-entrypoint.sh

tools/test-e2e.sh

@@ -23,4 +23,16 @@ for pull in "${pulls[@]}"; do
 done
 ((result == 0)) || exit "$result"
 
-exec "${GO:-go}" test -tags e2e -count=1 -parallel "$E2E_CONCURRENCY" -timeout 20m -v ./e2e/...
+args=(test -tags e2e -count=1 -parallel "$E2E_CONCURRENCY" -timeout 20m -v "$@" ./e2e/...)
+if [[ -f /.dockerenv ]]; then
+  exec "${GO:-go}" "${args[@]}"
+fi
+
+# Run like CI: in a Linux container on a user-defined network, which every container of the suite joins.
+network="gitea-runner-e2e-$$"
+docker network create "$network" > /dev/null
+trap 'docker network rm "$network" > /dev/null || true' EXIT
+docker run --rm --network "$network" -w "$PWD" -v "$PWD:$PWD" -v /var/run/docker.sock:/var/run/docker.sock \
+  -v gitea-runner-e2e-gomod:/go/pkg/mod -v gitea-runner-e2e-gocache:/root/.cache/go-build \
+  -e E2E_CONCURRENCY -e E2E_JOB_IMAGE -e E2E_GITEA_IMAGE -e E2E_K3S_IMAGE -e SERVICE_IMAGE \
+  "golang:$(sed -n 's/^toolchain go//p' go.mod)" go "${args[@]}"