Prepare v0.4.1 release notes

README.md

@@ -8,6 +8,13 @@ tagged-source delivery API, and the `version`, `check`, `publish`, `build`,
 maintainer procedure and prepared Woodpecker workflow for hosted note-page
 delivery are documented. ReleaseKit does not declare binary deliverables.
 
+Release operations can select one Go module within a repository. The repository
+root remains the default; a selected module's declared import path and physical
+directory determine its complete Git tag and module-local release note. See the
+[candidate check](docs/consumers/check.md),
+[publication](docs/consumers/publish.md), and
+[multi-module example](examples/multi-module/).
+
 See the [consumer adoption guide](docs/consumers/adoption.md) to add ReleaseKit
 as a versioned Go tool or package dependency, and the
 [v0.1.0 release note](docs/releases/v0.1.0.md) for the initial baseline.

build.go

@@ -2,9 +2,14 @@ package releasekit
 
 import (
 	"context"
+	"fmt"
 	"io"
 
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
 	internalbuild "gitea.maximumdirect.net/eric/ReleaseKit/internal/build"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
 
 // Target identifies one explicit Go operating-system and architecture pair.
@@ -22,11 +27,14 @@ type BuildSpec struct {
 
 // BuildRequest contains the source and output settings for Build.
 type BuildRequest struct {
-	RepositoryDir string    // source repository whose current HEAD is recorded.
-	Version       string    // stable vMAJOR.MINOR.PATCH value injected at link time.
-	Spec          BuildSpec // application package, artifact name, and targets.
-	OutputDir     string    // output location; empty selects <repository>/dist.
-	Output        io.Writer // optional build progress destination.
+	RepositoryDir string // directory within the source Git checkout whose HEAD is recorded.
+	// ModuleDir selects a repository-relative module directory; empty selects
+	// the repository root.
+	ModuleDir string
+	Version   string    // stable vMAJOR.MINOR.PATCH value injected at link time.
+	Spec      BuildSpec // application package, artifact name, and targets.
+	OutputDir string    // output location; relative paths use ModuleDir and empty selects <module>/dist.
+	Output    io.Writer // optional build progress destination.
 }
 
 // BuildArtifact identifies one generated binary and its SHA-256 digest.
@@ -40,6 +48,9 @@ type BuildArtifact struct {
 // BuildResult describes the source and artifacts reached by Build.
 type BuildResult struct {
 	RepositoryDir   string // absolute source repository path.
+	ModuleDir       string // absolute selected module directory.
+	ModulePath      string // selected module's declared Go path.
+	Tag             string // complete tag derived for this version.
 	CandidateCommit string // Git HEAD observed when the build started.
 	// SourceVerified reports clean source and the same HEAD observed before and
 	// after a completed build. It is required for binary delivery, not an attestation.
@@ -53,33 +64,60 @@ type BuildResult struct {
 	Compiler       string          // output of the selected local Go toolchain's version command.
 }
 
-// Build compiles the selected targets with Version injected through buildinfo.
-// It uses the available compatible local Go toolchain, applies ReleaseKit's
-// readonly offline build settings, preserves effective cache and tool settings,
-// and verifies the version command on the Go host before succeeding. An empty
-// target set records source identity without running the Go toolchain. Errors
-// return partial build facts in the result.
+// Build resolves the selected module's working-tree identity, then compiles the
+// selected targets with Version injected through buildinfo. It uses the
+// available compatible local Go toolchain, applies ReleaseKit's readonly
+// offline build settings, preserves effective cache and tool settings, and
+// verifies the version command on the Go host before succeeding. Relative
+// output paths use ModuleDir; an empty path selects its dist directory. An
+// empty target set records source identity without running the Go toolchain.
+// Errors return partial build facts in the result.
 func Build(ctx context.Context, request BuildRequest) (BuildResult, error) {
-	result, err := internalbuild.Build(ctx, internalbuild.Request{
-		RepositoryDir: request.RepositoryDir,
-		Version:       request.Version,
-		Spec:          *internalBuildSpec(&request.Spec),
-		OutputDir:     request.OutputDir,
-		Output:        request.Output,
+	spec := *internalBuildSpec(&request.Spec)
+	result := internalbuild.Result{Version: request.Version}
+	failure := func(err error) (BuildResult, error) {
+		result.Settings = artifact.NormalizeSettings(spec.MainPackage, spec.BinaryName, spec.Targets)
+		return publicBuildResult(result), err
+	}
+	if !versioncontract.ValidStableVersion(request.Version) {
+		return failure(fmt.Errorf("%w: %q", ErrInvalidVersion, request.Version))
+	}
+	repositoryDir, err := git.RepositoryRoot(ctx, request.RepositoryDir)
+	if err != nil {
+		return failure(err)
+	}
+	result.RepositoryDir = repositoryDir
+	identity, err := releaseidentity.FromWorkingTree(ctx, repositoryDir, request.ModuleDir, request.Version)
+	result.ModuleDir, result.ModulePath, result.Tag = identity.ModuleDir, identity.ModulePath, identity.Tag
+	if err != nil {
+		return failure(err)
+	}
+	result, err = internalbuild.BuildResolved(ctx, internalbuild.Request{
+		Identity:  identity,
+		Spec:      spec,
+		OutputDir: request.OutputDir,
+		Output:    request.Output,
 	})
+	return publicBuildResult(result), err
+}
+
+func publicBuildResult(result internalbuild.Result) BuildResult {
 	public := BuildResult{
 		RepositoryDir:   result.RepositoryDir,
+		ModuleDir:       result.ModuleDir,
+		ModulePath:      result.ModulePath,
+		Tag:             result.Tag,
 		CandidateCommit: result.CandidateCommit,
 		SourceVerified:  result.SourceVerified,
 		Version:         result.Version,
-		MainPackage:     result.MainPackage,
-		BinaryName:      result.BinaryName,
+		MainPackage:     result.Settings.MainPackage,
+		BinaryName:      result.Settings.BinaryName,
 		OutputDir:       result.OutputDir,
 		Compiler:        result.Compiler,
-		Targets:         make([]Target, 0, len(result.Targets)),
+		Targets:         make([]Target, 0, len(result.Settings.Targets)),
 		Artifacts:       make([]BuildArtifact, 0, len(result.Artifacts)),
 	}
-	for _, target := range result.Targets {
+	for _, target := range result.Settings.Targets {
 		public.Targets = append(public.Targets, Target{OS: target.OS, Arch: target.Arch})
 	}
 	for _, artifact := range result.Artifacts {
@@ -90,7 +128,7 @@ func Build(ctx context.Context, request BuildRequest) (BuildResult, error) {
 			SHA256:   artifact.SHA256,
 		})
 	}
-	return public, err
+	return public
 }
 
 func internalBuildSpec(spec *BuildSpec) *internalbuild.Spec {
@@ -105,8 +143,10 @@ func internalBuildSpec(spec *BuildSpec) *internalbuild.Spec {
 }
 
 func internalBuildResult(result BuildResult) *internalbuild.Result {
-	converted := &internalbuild.Result{RepositoryDir: result.RepositoryDir, CandidateCommit: result.CandidateCommit, SourceVerified: result.SourceVerified, Version: result.Version, MainPackage: result.MainPackage, BinaryName: result.BinaryName, OutputDir: result.OutputDir, Compiler: result.Compiler}
-	for _, target := range result.Targets {
+	input := internalBuildSpec(&BuildSpec{MainPackage: result.MainPackage, BinaryName: result.BinaryName, Targets: result.Targets})
+	settings := artifact.NormalizeSettings(input.MainPackage, input.BinaryName, input.Targets)
+	converted := &internalbuild.Result{RepositoryDir: result.RepositoryDir, ModuleDir: result.ModuleDir, ModulePath: result.ModulePath, Tag: result.Tag, CandidateCommit: result.CandidateCommit, SourceVerified: result.SourceVerified, Settings: settings, Version: result.Version, MainPackage: settings.MainPackage, BinaryName: settings.BinaryName, OutputDir: result.OutputDir, Compiler: result.Compiler}
+	for _, target := range settings.Targets {
 		converted.Targets = append(converted.Targets, internalbuild.Target{OS: target.OS, Arch: target.Arch})
 	}
 	for _, artifact := range result.Artifacts {

build_test.go

@@ -18,6 +18,29 @@ import (
 	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
 )
 
+func TestBuildPreservesInvalidVersionAndDeclarationFailureEvidence(t *testing.T) {
+	spec := releasekit.BuildSpec{MainPackage: "./cmd/app", BinaryName: "widget", Targets: []releasekit.Target{{OS: "linux", Arch: "amd64"}, {OS: "linux", Arch: "amd64"}}}
+	invalid, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: filepath.Join(t.TempDir(), "absent"), Version: "bad-version", Spec: spec,
+	})
+	if !errors.Is(err, releasekit.ErrInvalidVersion) || invalid.Version != "bad-version" || invalid.MainPackage != spec.MainPackage || invalid.BinaryName != spec.BinaryName || len(invalid.Targets) != 1 {
+		t.Fatalf("invalid version result = %#v, error = %v", invalid, err)
+	}
+	repo := newPublishFixture(t)
+	writeFile(t, repo.work, "nested/go.mod", "go 1.26.0\n")
+	failed, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repo.work, ModuleDir: "nested", Version: "v1.2.3", Spec: spec,
+	})
+	if err == nil || failed.RepositoryDir != repo.work || failed.ModuleDir != filepath.Join(repo.work, "nested") || failed.Version != "v1.2.3" || failed.MainPackage != spec.MainPackage || failed.BinaryName != spec.BinaryName || len(failed.Targets) != 1 || failed.SourceVerified {
+		t.Fatalf("declaration failure = %#v, error = %v", failed, err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := releasekit.Build(ctx, releasekit.BuildRequest{RepositoryDir: repo.work, Version: "v1.2.3", Spec: spec}); !errors.Is(err, context.Canceled) {
+		t.Fatalf("canceled build error = %v", err)
+	}
+}
+
 func TestBuildCreatesSelectedTargetsAndInjectsVersion(t *testing.T) {
 	repository := newBuildConsumer(t, `package main
 
@@ -115,7 +138,7 @@ func main() {
 	t.Setenv("GOARCH", "arm64")
 	result, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
 		RepositoryDir: repository,
-		Version:       "v2.3.4",
+		Version:       "v1.2.3",
 		Spec: releasekit.BuildSpec{
 			MainPackage: "./cmd/app",
 			BinaryName:  "fixture",
@@ -126,7 +149,7 @@ func main() {
 	if err != nil {
 		t.Fatalf("Build() error = %v; partial result = %#v", err, result)
 	}
-	if len(result.Artifacts) != 1 || result.Artifacts[0].Filename != "fixture-v2.3.4-windows-arm64.exe" {
+	if len(result.Artifacts) != 1 || result.Artifacts[0].Filename != "fixture-v1.2.3-windows-arm64.exe" {
 		t.Fatalf("build artifacts = %#v", result.Artifacts)
 	}
 }
@@ -166,7 +189,7 @@ func main() { if len(os.Args) == 2 && os.Args[1] == "version" { fmt.Printf("fixt
 
 			result, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
 				RepositoryDir: repository,
-				Version:       "v2.3.4",
+				Version:       "v1.2.3",
 				Spec: releasekit.BuildSpec{
 					MainPackage: "./cmd/app",
 					BinaryName:  "fixture",
@@ -242,6 +265,145 @@ func main() {}
 	}
 }
 
+func TestBuildUsesNestedWorkingTreeModuleAndModuleRelativeOutput(t *testing.T) {
+	repository := newBuildConsumer(t, "package main\nfunc main() {}\n")
+	moduleDir := filepath.Join(repository, "integrations", "nested")
+	writeNestedBuildConsumer(t, repository, "integrations/nested", "example.com/nestedbuild", `package main
+import (
+	"fmt"
+	"os"
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+func main() {
+	if len(os.Args) == 2 && os.Args[1] == "version" {
+		if logPath := os.Getenv("RELEASEKIT_SMOKE_LOG"); logPath != "" {
+			if executable, err := os.Executable(); err == nil {
+				_ = os.WriteFile(logPath, []byte(executable), 0o600)
+			}
+		}
+		fmt.Printf("nested-app %s\n", buildinfo.Version())
+	}
+}
+`)
+	outputDirectory := "artifacts"
+	crossTarget := releasekit.Target{OS: "darwin", Arch: "arm64"}
+	if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
+		crossTarget = releasekit.Target{OS: "linux", Arch: "amd64"}
+	}
+	nativeTarget := releasekit.Target{OS: runtime.GOOS, Arch: runtime.GOARCH}
+	result, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repository,
+		ModuleDir:     "integrations/nested",
+		Version:       "v1.2.3",
+		Spec: releasekit.BuildSpec{
+			MainPackage: "./cmd/app",
+			BinaryName:  "nested-app",
+			Targets:     []releasekit.Target{nativeTarget, crossTarget},
+		},
+		OutputDir: outputDirectory,
+	})
+	if err != nil {
+		t.Fatalf("Build() error = %v; result = %#v", err, result)
+	}
+	if result.ModuleDir != moduleDir || result.ModulePath != "example.com/nestedbuild" || result.Tag != "integrations/nested/v1.2.3" {
+		t.Fatalf("nested build identity = %#v", result)
+	}
+	wantOutput := filepath.Join(moduleDir, outputDirectory)
+	if result.OutputDir != wantOutput || len(result.Artifacts) != 2 {
+		t.Fatalf("nested build output = %#v, want directory %q and two artifacts", result, wantOutput)
+	}
+	var native string
+	for _, artifact := range result.Artifacts {
+		if filepath.Dir(artifact.Path) != wantOutput || !strings.Contains(artifact.Filename, "nested-app-v1.2.3-") {
+			t.Fatalf("nested artifact = %#v", artifact)
+		}
+		if artifact.Target == nativeTarget {
+			native = artifact.Path
+		}
+	}
+	if native == "" {
+		t.Fatalf("native artifact missing from %#v", result.Artifacts)
+	}
+	if output, err := exec.Command(native, "version").CombinedOutput(); err != nil || string(output) != "nested-app v1.2.3\n" {
+		t.Fatalf("nested native version = %q, error = %v", output, err)
+	}
+
+	localTemporary := filepath.Join(repository, "source-temporary")
+	if err := os.Mkdir(localTemporary, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	crossOutput := filepath.Join(t.TempDir(), "cross-artifacts")
+	smokeLog := filepath.Join(t.TempDir(), "smoke-executable")
+	t.Setenv("RELEASEKIT_SMOKE_LOG", smokeLog)
+	t.Setenv("TMPDIR", localTemporary)
+	smokeResult, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repository,
+		ModuleDir:     "integrations/nested",
+		Version:       "v1.2.3",
+		Spec: releasekit.BuildSpec{
+			MainPackage: "./cmd/app",
+			BinaryName:  "nested-app",
+			Targets:     []releasekit.Target{crossTarget},
+		},
+		OutputDir: crossOutput,
+	})
+	if err != nil || len(smokeResult.Artifacts) != 1 {
+		t.Fatalf("nested cross build with source-local TMPDIR = %#v, %v", smokeResult, err)
+	}
+	smokePathBytes, err := os.ReadFile(smokeLog)
+	if err != nil {
+		t.Fatalf("read native smoke executable path: %v", err)
+	}
+	smokePath := string(smokePathBytes)
+	relativeSmokePath, err := filepath.Rel(repository, smokePath)
+	if err != nil || relativeSmokePath == "." || (!filepath.IsAbs(relativeSmokePath) && relativeSmokePath != ".." && !strings.HasPrefix(relativeSmokePath, ".."+string(filepath.Separator))) {
+		t.Fatalf("native smoke output path %q is inside repository %q (relative %q, error %v)", smokePath, repository, relativeSmokePath, err)
+	}
+	if _, err := os.Stat(smokePath); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("native smoke output %q was not removed: %v", smokePath, err)
+	}
+	remaining, err := os.ReadDir(localTemporary)
+	if err != nil || len(remaining) != 0 {
+		t.Fatalf("native smoke output remained in source-local TMPDIR: %v %v", remaining, err)
+	}
+
+	emptyResult, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repository,
+		ModuleDir:     "integrations/nested",
+		Version:       "v1.2.3",
+	})
+	if err != nil || emptyResult.Compiler != "" || emptyResult.OutputDir != filepath.Join(moduleDir, "dist") {
+		t.Fatalf("nested empty build = %#v, %v", emptyResult, err)
+	}
+	if _, err := os.Stat(emptyResult.OutputDir); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("empty nested build created dist: %v", err)
+	}
+}
+
+func TestBuildResolvesDirtyWorkingTreeDeclaration(t *testing.T) {
+	repository := newBuildConsumer(t, "package main\nfunc main() {}\n")
+	declarationPath := filepath.Join(repository, "go.mod")
+	contents, err := os.ReadFile(declarationPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	updated := strings.Replace(string(contents), "module example.com/buildfixture", "module example.com/changedbuild", 1)
+	if updated == string(contents) {
+		t.Fatal("fixture module declaration was not replaced")
+	}
+	writeBuildFixture(t, repository, "go.mod", updated)
+	result, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repository,
+		Version:       "v1.2.3",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if result.ModulePath != "example.com/changedbuild" || result.Tag != "v1.2.3" {
+		t.Fatalf("dirty declaration identity = %#v", result)
+	}
+}
+
 func TestBuildRegeneratesOwnedOutputsAndPreservesUnrelatedFiles(t *testing.T) {
 	const source = `package main
 import("fmt";"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo")
@@ -432,6 +594,21 @@ func TestBuildCancellationReturnsCompletedArtifacts(t *testing.T) {
 
 func TestCheckBuildsAfterValidationAndKeepsOutputOutsideWorktree(t *testing.T) {
 	repository := newPublishFixture(t)
+	realGo, err := exec.LookPath("go")
+	if err != nil {
+		t.Fatal(err)
+	}
+	goShimDir := t.TempDir()
+	goLog := filepath.Join(goShimDir, "go-commands")
+	goShim := filepath.Join(goShimDir, "go")
+	shimSource := "#!/bin/sh\nset -eu\nprintf '%s\\n' \"$*\" >> \"$RELEASEKIT_REAL_GO_LOG\"\nexec \"$RELEASEKIT_REAL_GO\" \"$@\"\n"
+	if err := os.WriteFile(goShim, []byte(shimSource), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("RELEASEKIT_REAL_GO", realGo)
+	t.Setenv("RELEASEKIT_REAL_GO_LOG", goLog)
+	t.Setenv("GOENV", "off")
+	t.Setenv("PATH", goShimDir+string(os.PathListSeparator)+os.Getenv("PATH"))
 	writeFile(t, repository.work, "guide.md", "# Guide\n[section](#guide)\n")
 	gitRun(t, repository.work, "add", "guide.md")
 	gitRun(t, repository.work, "commit", "-m", "add Markdown guide")
@@ -465,6 +642,26 @@ func main() { if len(os.Args) == 2 && os.Args[1] == "version" { fmt.Printf("fixt
 	if validations != 1 || candidate.Commit != gitText(t, repository.work, "rev-parse", "HEAD") {
 		t.Fatalf("candidate = %#v, validation calls = %d", candidate, validations)
 	}
+	goCommands, err := os.ReadFile(goLog)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var discoveries, suites, builds, versions int
+	for _, command := range strings.Split(strings.TrimSpace(string(goCommands)), "\n") {
+		switch {
+		case strings.HasPrefix(command, "env "):
+			discoveries++
+		case strings.HasPrefix(command, "test "):
+			suites++
+		case strings.HasPrefix(command, "build "):
+			builds++
+		case command == "version":
+			versions++
+		}
+	}
+	if discoveries != 2 || suites != 1 || builds != 1 || versions != 1 {
+		t.Fatalf("Go commands = %q; discovery=%d suite=%d build=%d version=%d, want 2, 1, 1, 1", goCommands, discoveries, suites, builds, versions)
+	}
 	if got := gitText(t, repository.work, "status", "--porcelain"); got != "" {
 		t.Fatalf("candidate build dirtied worktree: %s", got)
 	}
@@ -528,6 +725,18 @@ func newBuildConsumer(t *testing.T, mainSource string) string {
 	return repository
 }
 
+func writeNestedBuildConsumer(t *testing.T, repository, moduleDir, modulePath, mainSource string) string {
+	t.Helper()
+	root, err := filepath.Abs(".")
+	if err != nil {
+		t.Fatal(err)
+	}
+	module := fmt.Sprintf("module %s\n\ngo 1.26.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.0.0\n\nreplace gitea.maximumdirect.net/eric/ReleaseKit => %s\n", modulePath, filepath.ToSlash(root))
+	writeBuildFixture(t, repository, filepath.ToSlash(filepath.Join(moduleDir, "go.mod")), module)
+	writeBuildFixture(t, repository, filepath.ToSlash(filepath.Join(moduleDir, "cmd/app/main.go")), mainSource)
+	return filepath.Join(repository, filepath.FromSlash(moduleDir))
+}
+
 func prepareCandidateBuild(t *testing.T, repository, mainSource string) {
 	t.Helper()
 	root, err := filepath.Abs(".")

check.go

@@ -18,21 +18,30 @@ var ErrInvalidVersion = candidate.ErrInvalidVersion
 var ErrUnexpectedPushURL = publish.ErrUnexpectedPushURL
 
 // Candidate identifies one committed local source revision selected for
-// validation.
+// validation. ModuleDir is the absolute selected module directory, ModulePath
+// is its declared Go import path, and Tag is the complete derived Git tag.
 type Candidate struct {
 	RepositoryDir string
+	ModuleDir     string
+	ModulePath    string
+	Tag           string
 	Commit        string
-	Version       string
+	Version       string // selected stable semantic version.
 }
 
 // ReleaseRequest contains the inputs used to validate and optionally build one
 // local candidate. Remote is retained for publication operations; Check makes
 // no remote availability claim.
 type ReleaseRequest struct {
+	// RepositoryDir names a directory within the source Git checkout. Operations
+	// resolve its root before applying repository-relative selections.
 	RepositoryDir string
-	Product       string
-	Version       string
-	Remote        string
+	// ModuleDir selects a repository-relative module directory; empty selects
+	// the repository root.
+	ModuleDir string
+	Product   string
+	Version   string // stable semantic version, independent of the derived Git tag.
+	Remote    string
 	// ExpectedPushURL optionally requires Publish's resolved push URL to match
 	// this string exactly before validation or tag creation. Check ignores this
 	// publication-only expectation. A mismatch returns ErrUnexpectedPushURL.
@@ -46,9 +55,18 @@ type ReleaseRequest struct {
 }
 
 // ValidationSpec selects optional shared validation checks. Its zero value
-// preserves the current validation behavior.
+// preserves the current validation behavior. File checks inspect the selected
+// module and shared-file inputs. Independent nested modules form automatic
+// input boundaries; vendored files remain included. Referenced destinations
+// remain available for targeted inspection without expanding the input set.
 type ValidationSpec struct {
-	Go GoValidationSpec
+	// SharedFiles adds repository-relative committed files to optional file
+	// checks. Nil selects the optional root COPYRIGHT, LICENSE, and
+	// docs/oss/attribution.md defaults; an empty non-nil slice selects none.
+	// Explicit files replace the defaults and must exist even when file checks
+	// are off.
+	SharedFiles []string
+	Go          GoValidationSpec
 	// GoFormat checks the formatting of committed regular Go source files. It
 	// does not modify repository contents and is disabled when false.
 	GoFormat bool
@@ -76,7 +94,7 @@ type FileSizeValidationSpec struct {
 	// LimitBytes is the maximum decimal byte count. Nil selects 1,000,000;
 	// zero is a zero-byte limit, and negative values are invalid.
 	LimitBytes *int64
-	// Exclusions are literal repository-relative file or directory paths.
+	// Exclusions are literal module-relative file or directory paths.
 	// A directory exclusion includes committed descendants.
 	Exclusions []string
 }
@@ -88,7 +106,8 @@ type ModuleDistributionValidationSpec struct {
 	// nested paths and symlink entries. It does not select Go's test workspace.
 	WorkspaceFiles bool
 	// LocalReplacements rejects filesystem replacements in committed go.mod
-	// declarations, including nested modules. It does not select Go's workspace.
+	// declarations in the selected inputs, including vendor and explicit shared
+	// files. It does not select Go's workspace.
 	LocalReplacements bool
 }
 
@@ -107,9 +126,12 @@ type GoValidationSpec struct {
 }
 
 // Check validates one local, committed release candidate. It requires a clean
-// worktree and index on main, a committed note matching Product and Version,
-// and an unused local tag. It always runs the offline Go test suite with the
-// available compatible local Go toolchain and Go host target, then calls
+// worktree and index on main, a selected module declaration and module-local
+// committed note matching Product and Version, and an unused local tag. An
+// empty ModuleDir selects the repository root. The module declaration
+// determines the full Git tag for the semantic Version. It always runs the
+// offline Go test suite with the available compatible local Go toolchain and
+// Go host target, then calls
 // AdditionalChecks when supplied. Validation.Go.Race runs that one suite with
 // the race detector, Validation.Go.FullVet runs go vet after the suite instead
 // of test-time vet, and Validation.Go.CompileTargets compiles all packages for
@@ -121,7 +143,7 @@ type GoValidationSpec struct {
 // files after formatting. Its zero value disables that distribution check and
 // does not change Go's workspace environment.
 // Validation.ModuleDistribution.LocalReplacements parses committed go.mod
-// declarations, including nested modules, and rejects filesystem replacements
+// declarations in the selected inputs and rejects filesystem replacements
 // after workspace-file inspection. Its zero value disables that check.
 // Validation.FileSize checks each selected committed blob after module
 // distribution checks. Its nil value disables size checks; an empty object
@@ -139,25 +161,34 @@ type GoValidationSpec struct {
 func Check(ctx context.Context, request ReleaseRequest) (Candidate, error) {
 	checked, err := candidate.Check(ctx, candidateRequest(request))
 	if err != nil {
-		return Candidate{}, convertValidationError(err)
+		return publicCandidate(checked), convertValidationError(err)
 	}
+	return publicCandidate(checked), nil
+}
+
+func publicCandidate(checked candidate.Candidate) Candidate {
 	return Candidate{
 		RepositoryDir: checked.RepositoryDir,
+		ModuleDir:     checked.ModuleDir,
+		ModulePath:    checked.ModulePath,
+		Tag:           checked.Tag,
 		Commit:        checked.Commit,
 		Version:       checked.Version,
-	}, nil
+	}
 }
 
 func candidateRequest(request ReleaseRequest) candidate.Request {
 	fileSize := internalFileSizeSettings(request.Validation.FileSize)
 	result := candidate.Request{
 		RepositoryDir: request.RepositoryDir,
+		ModuleDir:     request.ModuleDir,
 		Product:       request.Product,
 		Version:       request.Version,
 		Validation: validation.Settings{
 			Race:           request.Validation.Go.Race,
 			FullVet:        request.Validation.Go.FullVet,
 			CompileTargets: make([]validation.Target, len(request.Validation.Go.CompileTargets)),
+			SharedFiles:    copyStringSlice(request.Validation.SharedFiles),
 			GoFormat:       request.Validation.GoFormat,
 			Markdown:       internalMarkdownSettings(request.Validation.Markdown),
 			ModuleDistribution: validation.ModuleDistributionSettings{
@@ -176,6 +207,13 @@ func candidateRequest(request ReleaseRequest) candidate.Request {
 	return result
 }
 
+func copyStringSlice(values []string) []string {
+	if values == nil {
+		return nil
+	}
+	return append(make([]string, 0, len(values)), values...)
+}
+
 func internalMarkdownSettings(spec *MarkdownValidationSpec) *validation.MarkdownSettings {
 	if spec == nil {
 		return nil
@@ -203,10 +241,6 @@ func candidateChecks(checks func(context.Context, Candidate) error) func(context
 		return nil
 	}
 	return func(ctx context.Context, captured candidate.Candidate) error {
-		return checks(ctx, Candidate{
-			RepositoryDir: captured.RepositoryDir,
-			Commit:        captured.Commit,
-			Version:       captured.Version,
-		})
+		return checks(ctx, publicCandidate(captured))
 	}
 }

check_request_test.go

@@ -0,0 +1,38 @@
+package releasekit
+
+import "testing"
+
+func TestCandidateRequestPreservesSharedFileSelection(t *testing.T) {
+	for _, tt := range []struct {
+		name       string
+		input      []string
+		wantNil    bool
+		wantValues []string
+	}{
+		{name: "omitted defaults", input: nil, wantNil: true},
+		{name: "explicit empty", input: []string{}, wantValues: []string{}},
+		{name: "explicit paths", input: []string{"LICENSE", "docs/shared.md"}, wantValues: []string{"LICENSE", "docs/shared.md"}},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			request := ReleaseRequest{Validation: ValidationSpec{SharedFiles: tt.input}}
+			mapped := candidateRequest(request).Validation.SharedFiles
+			if (mapped == nil) != tt.wantNil {
+				t.Fatalf("mapped shared files nil=%t, want %t", mapped == nil, tt.wantNil)
+			}
+			if len(mapped) != len(tt.wantValues) {
+				t.Fatalf("mapped shared files = %#v, want %#v", mapped, tt.wantValues)
+			}
+			for index, value := range tt.wantValues {
+				if mapped[index] != value {
+					t.Fatalf("mapped shared files = %#v, want %#v", mapped, tt.wantValues)
+				}
+			}
+			if len(tt.input) != 0 {
+				request.Validation.SharedFiles[0] = "changed"
+				if mapped[0] != tt.wantValues[0] {
+					t.Fatal("mapped shared-file selection aliases the caller's slice")
+				}
+			}
+		})
+	}
+}

cmd/releasekit/assets_test.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
+)
+
+func TestBuildAndPrebuiltDeliveryUseSameDirectoryBase(t *testing.T) {
+	for _, tt := range []struct {
+		name, module string
+		absolute     bool
+		alias        bool
+	}{
+		{name: "root relative"},
+		{name: "nested relative", module: "apps/widget"},
+		{name: "nested absolute", module: "apps/widget", absolute: true},
+		{name: "nested checkout alias", module: "apps/widget", absolute: true, alias: true},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			repository := newDeliveryBuildRepository(t)
+			moduleDirectory := repository
+			tag := "v1.2.3"
+			if tt.module != "" {
+				moduleDirectory = filepath.Join(repository, filepath.FromSlash(tt.module))
+				tag = tt.module + "/v1.2.3"
+				for _, name := range []string{"go.mod", "main.go", "docs/releases/v1.2.3.md"} {
+					contents, err := os.ReadFile(filepath.Join(repository, filepath.FromSlash(name)))
+					if err != nil {
+						t.Fatal(err)
+					}
+					writeRepositoryFile(t, repository, tt.module+"/"+name, string(contents))
+				}
+			}
+			writeRepositoryFile(t, repository, ".gitignore", "dist/\n")
+			state := &deliveryServerState{data: deliveryServerData{tag: tag}}
+			server := newDeliveryServer(t, state)
+			defer server.Close()
+			settings := cli.Settings{Product: "Example Product", ModuleDir: tt.module,
+				Build:    &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}},
+				Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
+			}
+			writeDeliveryProfile(t, repository, settings)
+			cliGitRun(t, repository, "add", ".")
+			cliGitRun(t, repository, "commit", "-m", "Prepare module source and output exclusion")
+			state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
+			cliGitRun(t, repository, "tag", tag)
+			output, resolved := "dist", filepath.Join(moduleDirectory, "dist")
+			if tt.absolute {
+				output = filepath.Join(t.TempDir(), "assets")
+				resolved = output
+			}
+			var stdout, stderr bytes.Buffer
+			invocationRepository := repository
+			if tt.alias {
+				invocationRepository = filepath.Join(t.TempDir(), "checkout-alias")
+				if err := os.Symlink(repository, invocationRepository); err != nil {
+					t.Fatal(err)
+				}
+			}
+			if status := run(context.Background(), []string{"build", "--repo", invocationRepository, "--output", output, "v1.2.3"}, &stdout, &stderr); status != 0 {
+				t.Fatalf("build status=%d, stderr=%s", status, stderr.String())
+			}
+			receipt, err := cli.LoadBuildReceipt(filepath.Join(resolved, cli.BuildReceiptName))
+			if err != nil || receipt.ModuleDir != moduleDirectory || receipt.Tag != tag {
+				t.Fatalf("build receipt=%#v, error=%v", receipt, err)
+			}
+			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
+			args := []string{"deliver", "--repo", invocationRepository, "--assets", output, "v1.2.3"}
+			stdout.Reset()
+			stderr.Reset()
+			if status := run(context.Background(), args, &stdout, &stderr); status != 0 || state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 2 {
+				t.Fatalf("delivery status=%d, creates=%d, uploads=%d, stderr=%s", status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stderr.String())
+			}
+			if tt.alias {
+				if status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", output, "v1.2.3"}, &stdout, &stderr); status != 0 || state.snapshot().assetUploads != 2 {
+					t.Fatalf("physical-path retry status=%d, uploads=%d, stderr=%s", status, state.snapshot().assetUploads, stderr.String())
+				}
+			}
+			if tt.module != "" {
+				cliGitRun(t, repository, "tag", "v1.2.3")
+				wrongModule := settings
+				wrongModule.ModuleDir = ""
+				invocation := cli.Invocation{Repository: repository, AssetsDir: resolved, Version: "v1.2.3"}
+				requestsBefore := state.snapshot().apiRequests
+				if status := deliverWithSettings(context.Background(), invocation, wrongModule, &stdout, &stderr); status != 1 || state.snapshot().apiRequests != requestsBefore {
+					t.Fatalf("wrong module status=%d, requests=%d->%d, stderr=%s", status, requestsBefore, state.snapshot().apiRequests, stderr.String())
+				}
+			}
+			if err := os.WriteFile(receipt.Artifacts[0].Path, []byte("changed"), 0o600); err != nil {
+				t.Fatal(err)
+			}
+			requestsBefore := state.snapshot().apiRequests
+			if status := run(context.Background(), args, &stdout, &stderr); status != 1 || state.snapshot().apiRequests != requestsBefore {
+				t.Fatalf("changed content status=%d, requests=%d->%d, stderr=%s", status, requestsBefore, state.snapshot().apiRequests, stderr.String())
+			}
+		})
+	}
+}

cmd/releasekit/committed_identity_test.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
+)
+
+func TestCandidateCheckUsesCommittedDeclarationSymlink(t *testing.T) {
+	repository := newCLIRepository(t)
+	if err := os.Rename(filepath.Join(repository, "go.mod"), filepath.Join(repository, "module.txt")); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("module.txt", filepath.Join(repository, "go.mod")); err != nil {
+		t.Fatal(err)
+	}
+	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product"})
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "Use committed declaration symlink")
+	var stdout, stderr bytes.Buffer
+	if status := run(context.Background(), []string{"check", "--repo", repository, "v1.2.3"}, &stdout, &stderr); status != 0 {
+		t.Fatalf("linked declaration check status=%d stderr=%s", status, stderr.String())
+	}
+}
+
+func TestPageOnlyDeliveryUsesCommittedModuleInSparseCheckout(t *testing.T) {
+	repository := newCLIRepository(t)
+	const module = "apps/widget"
+	writeRepositoryFile(t, repository, module+"/go.mod", "module example.com/widget\n\ngo 1.26.0\n")
+	writeRepositoryFile(t, repository, module+"/docs/releases/v1.2.3.md", "# Example Product v1.2.3\n\nNested release note.\n")
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "Add sparse release module")
+	state := &deliveryServerState{data: deliveryServerData{tag: module + "/v1.2.3"}}
+	server := newDeliveryServer(t, state)
+	defer server.Close()
+	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", ModuleDir: module,
+		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
+	})
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
+	cliGitRun(t, repository, "tag", state.snapshot().tag)
+	cliGitRun(t, repository, "checkout", "--detach", state.snapshot().tag)
+	cliGitRun(t, repository, "sparse-checkout", "set", "--cone", "docs")
+	if _, err := os.Stat(filepath.Join(repository, filepath.FromSlash(module))); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("module fixture is materialized: %v", err)
+	}
+	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
+	gitOnly := t.TempDir()
+	gitPath, err := exec.LookPath("git")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(gitPath, filepath.Join(gitOnly, "git")); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("PATH", gitOnly)
+	for _, args := range [][]string{
+		{"deliver", "--repo", repository, "v1.2.3"},
+		{"ci-deliver", "--repo", repository, "--prepared", "--expected-module", module, "--commit", state.snapshot().commit, state.snapshot().tag},
+	} {
+		var stdout, stderr bytes.Buffer
+		if status := run(context.Background(), args, &stdout, &stderr); status != 0 || state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 0 {
+			t.Fatalf("%s sparse delivery status=%d creates=%d uploads=%d stderr=%s", args[0], status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stderr.String())
+		}
+	}
+}

cmd/releasekit/example_source_test.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestMultiModuleExampleSetupUsesCurrentSourceTool(t *testing.T) {
+	root := cliRepositoryRoot(t)
+	repository := newCLIRepository(t)
+	copyExampleTree(t, filepath.Join(root, "examples", "multi-module"), repository)
+	const module = "gitea.maximumdirect.net/eric/ReleaseKit"
+	environment := append(os.Environ(), "GOTOOLCHAIN=local", "GOWORK=off", "GOPROXY=off", "GOSUMDB=off", "GOFLAGS=")
+	goCommand := func(directory string, args ...string) string {
+		t.Helper()
+		command := exec.Command("go", args...)
+		command.Dir, command.Env = directory, environment
+		output, err := command.CombinedOutput()
+		if err != nil {
+			t.Fatalf("go %q: %v\n%s", args, err, output)
+		}
+		return string(output)
+	}
+	selections := []struct {
+		directory, profile, product, version string
+	}{
+		{".", "releasekit-root.json", "Example Consumer", "v1.2.3"},
+		{"integrations/ckconfig", "releasekit-ckconfig.json", "Example Consumer Integration", "v1.2.3"},
+		{"integrations/core/v2", "releasekit-core-v2.json", "Example Consumer Core v2", "v2.1.0"},
+	}
+	for _, selected := range selections {
+		directory := filepath.Join(repository, filepath.FromSlash(selected.directory))
+		if selected.directory != "integrations/core/v2" {
+			writeRepositoryFile(t, repository, selected.directory+"/source.go", "package candidate\n")
+		}
+		goCommand(directory, "mod", "edit", "-require="+module+"@v0.0.0", "-replace="+module+"="+root, "-tool="+module+"/cmd/releasekit")
+		goCommand(directory, "mod", "tidy")
+		writeRepositoryFile(t, repository, selected.directory+"/docs/releases/"+selected.version+".md", "# "+selected.product+" "+selected.version+"\n\nSource verification fixture.\n")
+	}
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "Select current source in disposable example")
+	for _, selected := range selections {
+		output := goCommand(filepath.Join(repository, filepath.FromSlash(selected.directory)), "tool", "releasekit", "check", "--config", selected.profile, selected.version)
+		if !strings.Contains(output, "is valid") {
+			t.Fatalf("source-selected check output=%s", output)
+		}
+	}
+	if status := cliGitOutput(t, repository, "status", "--porcelain"); status != "" {
+		t.Fatalf("source verification changed committed fixture: %s", status)
+	}
+}

cmd/releasekit/internal/cli/config.go

@@ -14,9 +14,10 @@ import (
 	"strings"
 
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/process"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
 
-const Usage = "usage: releasekit version\n       releasekit check [--repo DIR] [--config FILE] VERSION\n       releasekit publish [--repo DIR] [--config FILE] VERSION\n       releasekit build [--repo DIR] [--config FILE] [--output DIR] VERSION\n       releasekit deliver [--repo DIR] [--config FILE] [--assets DIR] VERSION\n       releasekit ci-deliver [--repo DIR] [--config FILE] [--remote NAME] --commit OID VERSION"
+const Usage = "usage: releasekit version\n       releasekit check [--repo DIR] [--config FILE] VERSION\n       releasekit publish [--repo DIR] [--config FILE] [--expected-module DIR] VERSION\n       releasekit build [--repo DIR] [--config FILE] [--output DIR] VERSION\n       releasekit deliver [--repo DIR] [--config FILE] [--assets DIR] VERSION\n       releasekit ci-deliver [--repo DIR] [--config FILE] [--remote NAME] [--prepared] [--expected-module DIR] --commit OID TAG"
 
 type Command string
 
@@ -31,14 +32,17 @@ const (
 
 // Invocation contains parsed command settings owned by the CLI adapter.
 type Invocation struct {
-	Command    Command
-	Repository string
-	ConfigPath string
-	OutputDir  string
-	AssetsDir  string
-	Remote     string
-	Commit     string
-	Version    string
+	Command        Command
+	Repository     string
+	ConfigPath     string
+	OutputDir      string
+	AssetsDir      string
+	Remote         string
+	Commit         string
+	Version        string
+	ExpectedModule string
+	ExpectedTag    string
+	Prepared       bool
 }
 
 // Parse accepts only commands that have been implemented by the executable.
@@ -67,10 +71,16 @@ func Parse(args []string) (Invocation, error) {
 			flags.StringVar(&assetsDir, "assets", "", "verified build assets directory")
 		}
 		var remote *string
+		expectedModule := ""
+		if action == PublishAction || action == CIDeliveryAction {
+			flags.StringVar(&expectedModule, "expected-module", "", "expected module directory from a launcher mapping")
+		}
 		expectedCommit := ""
+		prepared := false
 		if action == CIDeliveryAction {
 			remote = flags.String("remote", "origin", "Git remote")
 			flags.StringVar(&expectedCommit, "commit", "", "expected tagged commit")
+			flags.BoolVar(&prepared, "prepared", false, "verify an already prepared tagged checkout without fetching or checkout")
 		}
 		if err := flags.Parse(args[1:]); err != nil {
 			return Invocation{}, err
@@ -84,11 +94,25 @@ func Parse(args []string) (Invocation, error) {
 		if action == CIDeliveryAction && !validGitObjectID(expectedCommit) {
 			return Invocation{}, errors.New("ci-deliver --commit must be a full Git object ID")
 		}
+		version := flags.Arg(0)
+		expectedTag := ""
+		if action == CIDeliveryAction {
+			expectedTag = version
+			if slash := strings.LastIndex(version, "/"); slash >= 0 {
+				version = version[slash+1:]
+			}
+			if !versioncontract.ValidStableVersion(version) {
+				return Invocation{}, errors.New("ci-deliver TAG must end in a stable vMAJOR.MINOR.PATCH version")
+			}
+		}
+		if !versioncontract.ValidStableVersion(version) {
+			return Invocation{}, errors.New("VERSION must be a stable vMAJOR.MINOR.PATCH version")
+		}
 		parsedRemote := ""
 		if remote != nil {
 			parsedRemote = *remote
 		}
-		return Invocation{Command: action, Repository: *repository, ConfigPath: *configPath, OutputDir: outputDir, AssetsDir: assetsDir, Remote: parsedRemote, Commit: expectedCommit, Version: flags.Arg(0)}, nil
+		return Invocation{Command: action, Repository: *repository, ConfigPath: *configPath, OutputDir: outputDir, AssetsDir: assetsDir, Remote: parsedRemote, Commit: expectedCommit, Version: version, ExpectedModule: expectedModule, ExpectedTag: expectedTag, Prepared: prepared}, nil
 	default:
 		return Invocation{}, fmt.Errorf("unknown command %q", args[0])
 	}
@@ -116,6 +140,7 @@ type CheckCommand struct {
 // validation selections, and check commands read from a releasekit.json profile.
 type Settings struct {
 	Product         string              `json:"product"`
+	ModuleDir       string              `json:"module_dir,omitempty"`
 	Remote          string              `json:"remote,omitempty"`
 	ExpectedPushURL string              `json:"expected_push_url,omitempty"`
 	Checks          []CheckCommand      `json:"checks,omitempty"`
@@ -126,7 +151,10 @@ type Settings struct {
 
 // ValidationSettings selects shared candidate checks in a release profile.
 type ValidationSettings struct {
-	Go GoValidationSettings `json:"go,omitempty"`
+	// SharedFiles selects committed files relative to the repository root.
+	// Nil uses optional defaults; a non-nil empty slice selects no shared files.
+	SharedFiles []string             `json:"shared_files"`
+	Go          GoValidationSettings `json:"go,omitempty"`
 	// GoFormat checks the formatting of committed regular Go source files.
 	// Omitted or false disables the check.
 	GoFormat           bool                       `json:"go_format,omitempty"`
@@ -269,9 +297,9 @@ func LoadSettings(repoDir, configPath string) (Settings, error) {
 	return settings, nil
 }
 
-// RunChecks runs configured argument vectors in repoDir. Each command receives
+// RunChecks runs configured argument vectors in dir. Each command receives
 // its own environment overlay and inherits the remaining process environment.
-func RunChecks(ctx context.Context, repoDir string, checks []CheckCommand, ownedEnv map[string]string, stdout, stderr io.Writer) error {
+func RunChecks(ctx context.Context, dir string, checks []CheckCommand, ownedEnv map[string]string, stdout, stderr io.Writer) error {
 	for i, check := range checks {
 		environment := make(map[string]string, len(check.Env)+len(ownedEnv))
 		for key, value := range check.Env {
@@ -282,7 +310,7 @@ func RunChecks(ctx context.Context, repoDir string, checks []CheckCommand, owned
 		}
 		if err := process.Run(ctx, process.Invocation{
 			Args:   check.Args,
-			Dir:    repoDir,
+			Dir:    dir,
 			Env:    environment,
 			Stdout: stdout,
 			Stderr: stderr,

cmd/releasekit/internal/cli/config_test.go

@@ -33,6 +33,10 @@ func TestParse(t *testing.T) {
 	if publish.Command != PublishAction || publish.Repository != "candidate" || publish.ConfigPath != "releasekit.json" || publish.Version != "v1.2.4" {
 		t.Fatalf("Parse(publish) = %#v", publish)
 	}
+	publishMapped, err := Parse([]string{"publish", "--repo", "candidate", "--expected-module", "integrations/ckconfig", "v1.2.4"})
+	if err != nil || publishMapped.ExpectedModule != "integrations/ckconfig" {
+		t.Fatalf("Parse(publish --expected-module) = %#v, error = %v", publishMapped, err)
+	}
 	build, err := Parse([]string{"build", "--repo", "candidate", "--config", "releasekit.json", "--output", "output with spaces", "v1.2.5"})
 	if err != nil {
 		t.Fatal(err)
@@ -47,11 +51,11 @@ func TestParse(t *testing.T) {
 	if deliver.Command != DeliveryAction || deliver.Repository != "candidate" || deliver.ConfigPath != "releasekit.json" || deliver.AssetsDir != "assets with spaces" || deliver.Version != "v1.2.6" {
 		t.Fatalf("Parse(deliver) = %#v", deliver)
 	}
-	ciDelivery, err := Parse([]string{"ci-deliver", "--repo", "candidate", "--config", "profiles/release config.json", "--remote", "upstream", "--commit", "0123456789abcdef0123456789abcdef01234567", "v1.2.7"})
+	ciDelivery, err := Parse([]string{"ci-deliver", "--repo", "candidate", "--config", "profiles/release config.json", "--remote", "upstream", "--prepared", "--expected-module", "integrations/ckconfig", "--commit", "0123456789abcdef0123456789abcdef01234567", "integrations/ckconfig/v1.2.7"})
 	if err != nil {
 		t.Fatal(err)
 	}
-	if ciDelivery.Command != CIDeliveryAction || ciDelivery.Repository != "candidate" || ciDelivery.ConfigPath != "profiles/release config.json" || ciDelivery.Remote != "upstream" || ciDelivery.Commit != "0123456789abcdef0123456789abcdef01234567" || ciDelivery.Version != "v1.2.7" {
+	if ciDelivery.Command != CIDeliveryAction || ciDelivery.Repository != "candidate" || ciDelivery.ConfigPath != "profiles/release config.json" || ciDelivery.Remote != "upstream" || ciDelivery.Commit != "0123456789abcdef0123456789abcdef01234567" || ciDelivery.Version != "v1.2.7" || ciDelivery.ExpectedTag != "integrations/ckconfig/v1.2.7" || ciDelivery.ExpectedModule != "integrations/ckconfig" || !ciDelivery.Prepared {
 		t.Fatalf("Parse(ci-deliver) = %#v", ciDelivery)
 	}
 	ciDefault, err := Parse([]string{"ci-deliver", "--commit", "0123456789abcdef0123456789abcdef01234567", "v1.2.8"})
@@ -64,6 +68,9 @@ func TestParse(t *testing.T) {
 	if _, err := Parse([]string{"ci-deliver", "--commit", "abc123", "v1.2.3"}); err == nil || !strings.Contains(err.Error(), "full Git object ID") {
 		t.Fatalf("Parse(ci-deliver with abbreviated commit) error = %v, want full object ID error", err)
 	}
+	if _, err := Parse([]string{"ci-deliver", "--commit", "0123456789abcdef0123456789abcdef01234567", "integrations/ckconfig/latest"}); err == nil || !strings.Contains(err.Error(), "stable vMAJOR.MINOR.PATCH") {
+		t.Fatalf("Parse(ci-deliver unstable terminal tag) error = %v", err)
+	}
 	if _, err := Parse([]string{"check", "v1.2.3", "--repo", "repository"}); err == nil {
 		t.Fatal("Parse accepted a flag after the version")
 	}
@@ -166,6 +173,56 @@ func TestLoadSettingsReadsGoValidation(t *testing.T) {
 	}
 }
 
+func TestLoadSettingsPreservesSharedFilesSelection(t *testing.T) {
+	repoDir := t.TempDir()
+	profileDir := filepath.Join(repoDir, "profiles")
+	if err := os.MkdirAll(profileDir, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	for _, test := range []struct {
+		name     string
+		profile  string
+		wantNil  bool
+		wantFile string
+	}{
+		{name: "omitted", profile: `{"product":"Example","module_dir":"integrations/ckconfig","validation":{}}`, wantNil: true},
+		{name: "null", profile: `{"product":"Example","module_dir":"integrations/ckconfig","validation":{"shared_files":null}}`, wantNil: true},
+		{name: "empty", profile: `{"product":"Example","module_dir":"integrations/ckconfig","validation":{"shared_files":[]}}`},
+		{name: "selected", profile: `{"product":"Example","module_dir":"integrations/ckconfig","validation":{"shared_files":["../README.md"]}}`, wantFile: "../README.md"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			path := filepath.Join(profileDir, "release.json")
+			if err := os.WriteFile(path, []byte(test.profile), 0o600); err != nil {
+				t.Fatal(err)
+			}
+			settings, err := LoadSettings(repoDir, filepath.Join("profiles", "release.json"))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if settings.ModuleDir != "integrations/ckconfig" {
+				t.Fatalf("module_dir = %q", settings.ModuleDir)
+			}
+			if settings.Validation == nil || (settings.Validation.SharedFiles == nil) != test.wantNil {
+				t.Fatalf("shared_files = %#v, want nil=%t", settings.Validation, test.wantNil)
+			}
+			if test.wantFile != "" && (len(settings.Validation.SharedFiles) != 1 || settings.Validation.SharedFiles[0] != test.wantFile) {
+				t.Fatalf("shared_files = %#v, want %q", settings.Validation.SharedFiles, test.wantFile)
+			}
+			encoded, err := json.Marshal(settings)
+			if err != nil {
+				t.Fatal(err)
+			}
+			var roundTrip Settings
+			if err := json.Unmarshal(encoded, &roundTrip); err != nil {
+				t.Fatal(err)
+			}
+			if (roundTrip.Validation.SharedFiles == nil) != test.wantNil {
+				t.Fatalf("serialized shared_files = %#v, want nil=%t; JSON=%s", roundTrip.Validation.SharedFiles, test.wantNil, encoded)
+			}
+		})
+	}
+}
+
 func TestLoadSettingsPreservesMarkdownObjectSelection(t *testing.T) {
 	repoDir := t.TempDir()
 	profilePath := filepath.Join(repoDir, "releasekit.json")

cmd/releasekit/internal/cli/receipt.go

@@ -2,7 +2,6 @@ package cli
 
 import (
 	"crypto/sha256"
-	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -12,10 +11,12 @@ import (
 	"strings"
 
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
 
 const BuildReceiptName = ".releasekit-build.json"
+const BuildReceiptSchemaVersion = 1
 
 type ReceiptTarget struct {
 	OS   string `json:"os"`
@@ -31,7 +32,11 @@ type ReceiptArtifact struct {
 
 // BuildReceipt is private local coordination data for generated binaries.
 type BuildReceipt struct {
+	SchemaVersion   int               `json:"schema_version"`
 	RepositoryDir   string            `json:"repository_dir"`
+	ModuleDir       string            `json:"module_dir"`
+	ModulePath      string            `json:"module_path"`
+	Tag             string            `json:"tag"`
 	CandidateCommit string            `json:"candidate_commit"`
 	SourceVerified  bool              `json:"source_verified"`
 	Version         string            `json:"version"`
@@ -49,7 +54,7 @@ func WriteBuildReceipt(outputDir string, receipt BuildReceipt) (string, error) {
 		return "", fmt.Errorf("resolve build receipt directory: %w", err)
 	}
 	receipt.OutputDir = resolvedDir
-	if err := validateBuildReceipt(receipt, true); err != nil {
+	if err := validateBuildReceipt(receipt); err != nil {
 		return "", err
 	}
 	contents, err := json.MarshalIndent(receipt, "", "  ")
@@ -111,41 +116,62 @@ func LoadBuildReceipt(path string) (BuildReceipt, error) {
 		}
 		return BuildReceipt{}, fmt.Errorf("decode build receipt: %w", err)
 	}
-	if err := validateBuildReceipt(receipt, true); err != nil {
+	if err := validateBuildReceipt(receipt); err != nil {
+		if receipt.SchemaVersion != BuildReceiptSchemaVersion {
+			return BuildReceipt{}, fmt.Errorf("%w; regenerate it with the updated build command", err)
+		}
 		return BuildReceipt{}, err
 	}
-	if filepath.Clean(receipt.OutputDir) != filepath.Dir(resolvedPath) {
+	if !sameDirectory(receipt.OutputDir, filepath.Dir(resolvedPath)) {
 		return BuildReceipt{}, errors.New("build receipt output directory does not match its location")
 	}
 	return receipt, nil
 }
 
 func (receipt BuildReceipt) MatchesBuild(repositoryDir, commit, version string, settings BuildSettings) bool {
-	resolvedRepo, err := filepath.Abs(repositoryDir)
-	if err != nil || filepath.Clean(receipt.RepositoryDir) != filepath.Clean(resolvedRepo) {
+	if !sameDirectory(receipt.RepositoryDir, repositoryDir) {
 		return false
 	}
-	if receipt.CandidateCommit != commit || receipt.Version != version || receipt.MainPackage != settings.MainPackage || receipt.BinaryName != settings.BinaryName {
+	if receipt.CandidateCommit != commit || receipt.Version != version {
 		return false
 	}
-	want := normalizeReceiptTargets(settings.Targets)
-	if len(want) != len(receipt.Targets) {
+	want := artifact.NormalizeSettings(settings.MainPackage, settings.BinaryName, parseReceiptTargets(settings.Targets))
+	got := artifact.NormalizeSettings(receipt.MainPackage, receipt.BinaryName, parseStoredTargets(receipt.Targets))
+	if want.MainPackage != got.MainPackage || want.BinaryName != got.BinaryName || len(want.Targets) != len(got.Targets) {
 		return false
 	}
-	for i, target := range want {
-		if target != receipt.Targets[i] {
+	for i, target := range want.Targets {
+		if target != got.Targets[i] {
 			return false
 		}
 	}
 	return true
 }
 
-func validateBuildReceipt(receipt BuildReceipt, verifyFiles bool) error {
+func sameDirectory(first, second string) bool {
+	firstInfo, err := os.Stat(first)
+	if err != nil {
+		return false
+	}
+	secondInfo, err := os.Stat(second)
+	return err == nil && os.SameFile(firstInfo, secondInfo)
+}
+
+func validateBuildReceipt(receipt BuildReceipt) error {
+	if receipt.SchemaVersion != BuildReceiptSchemaVersion {
+		return fmt.Errorf("unsupported or missing build receipt schema version %d", receipt.SchemaVersion)
+	}
 	if !versioncontract.ValidStableVersion(receipt.Version) {
 		return fmt.Errorf("build receipt has invalid version %q", receipt.Version)
 	}
-	if !filepath.IsAbs(receipt.RepositoryDir) || !filepath.IsAbs(receipt.OutputDir) {
-		return errors.New("build receipt repository and output directories must be absolute")
+	if !filepath.IsAbs(receipt.RepositoryDir) || !filepath.IsAbs(receipt.ModuleDir) || !filepath.IsAbs(receipt.OutputDir) {
+		return errors.New("build receipt repository, module, and output directories must be absolute")
+	}
+	if strings.TrimSpace(receipt.ModulePath) == "" || strings.TrimSpace(receipt.Tag) == "" {
+		return errors.New("build receipt is missing module path or full tag")
+	}
+	if err := validateRecordedIdentity(receipt); err != nil {
+		return fmt.Errorf("build receipt has inconsistent module identity: %w", err)
 	}
 	if !validCommitID(receipt.CandidateCommit) {
 		return errors.New("build receipt has invalid candidate commit")
@@ -191,39 +217,38 @@ func validateBuildReceipt(receipt BuildReceipt, verifyFiles bool) error {
 		if !validSHA256(artifact.SHA256) {
 			return fmt.Errorf("build receipt has invalid SHA-256 for %q", artifact.Filename)
 		}
-		if verifyFiles {
-			if err := verifyReceiptArtifact(artifact); err != nil {
-				return err
-			}
-		}
 	}
 	return nil
 }
 
-func verifyReceiptArtifact(artifact ReceiptArtifact) error {
-	info, err := os.Lstat(artifact.Path)
+func validateRecordedIdentity(receipt BuildReceipt) error {
+	repositoryDir := filepath.Clean(receipt.RepositoryDir)
+	moduleDir := filepath.Clean(receipt.ModuleDir)
+	relative, err := filepath.Rel(repositoryDir, moduleDir)
 	if err != nil {
-		return fmt.Errorf("inspect build artifact %q: %w", artifact.Path, err)
+		return fmt.Errorf("relate module directory to repository: %w", err)
 	}
-	if !info.Mode().IsRegular() {
-		return fmt.Errorf("build artifact %q is not a regular file", artifact.Path)
+	if relative == ".." || strings.HasPrefix(relative, ".."+string(filepath.Separator)) || filepath.IsAbs(relative) {
+		return errors.New("module directory is outside repository")
 	}
-	file, err := os.Open(artifact.Path)
+	if relative == "" {
+		relative = "."
+	}
+	identity, err := releaseidentity.Derive(releaseidentity.Selection{
+		RepositoryDir: repositoryDir,
+		ModuleDir:     moduleDir,
+		ModuleSubdir:  filepath.ToSlash(relative),
+	}, []byte("module "+receipt.ModulePath+"\n"), receipt.Version)
 	if err != nil {
-		return fmt.Errorf("open build artifact %q: %w", artifact.Path, err)
+		return err
 	}
-	defer file.Close()
-	hash := sha256.New()
-	if _, err := io.Copy(hash, file); err != nil {
-		return fmt.Errorf("hash build artifact %q: %w", artifact.Path, err)
-	}
-	if actual := hex.EncodeToString(hash.Sum(nil)); actual != artifact.SHA256 {
-		return fmt.Errorf("build artifact %q hash changed: got %s, expected %s", artifact.Path, actual, artifact.SHA256)
+	if identity.Tag != receipt.Tag {
+		return fmt.Errorf("full tag %q does not match module selection and version; want %q", receipt.Tag, identity.Tag)
 	}
 	return nil
 }
 
-func normalizeReceiptTargets(targets []string) []ReceiptTarget {
+func parseReceiptTargets(targets []string) []artifact.Target {
 	parsed := make([]artifact.Target, 0, len(targets))
 	for _, value := range targets {
 		goos, goarch, ok := strings.Cut(value, "/")
@@ -232,12 +257,15 @@ func normalizeReceiptTargets(targets []string) []ReceiptTarget {
 		}
 		parsed = append(parsed, artifact.Target{OS: goos, Arch: goarch})
 	}
-	normalized := artifact.NormalizeTargets(parsed)
-	result := make([]ReceiptTarget, 0, len(normalized))
-	for _, target := range normalized {
-		result = append(result, ReceiptTarget{OS: target.OS, Arch: target.Arch})
+	return parsed
+}
+
+func parseStoredTargets(targets []ReceiptTarget) []artifact.Target {
+	parsed := make([]artifact.Target, 0, len(targets))
+	for _, target := range targets {
+		parsed = append(parsed, artifact.Target{OS: target.OS, Arch: target.Arch})
 	}
-	return result
+	return parsed
 }
 
 func validCommitID(value string) bool {

cmd/releasekit/internal/cli/receipt_test.go

@@ -3,62 +3,103 @@ package cli
 import (
 	"crypto/sha256"
 	"encoding/hex"
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 )
 
-func TestBuildReceiptRoundTripBindsFilesAndBuildInputs(t *testing.T) {
-	outputDir := t.TempDir()
-	repositoryDir := t.TempDir()
-	filename := "example-v1.2.3-linux-amd64"
-	artifactPath := filepath.Join(outputDir, filename)
-	contents := []byte("built application")
-	if err := os.WriteFile(artifactPath, contents, 0o755); err != nil {
-		t.Fatal(err)
-	}
-	digest := sha256.Sum256(contents)
-	receipt := BuildReceipt{
-		RepositoryDir:   repositoryDir,
-		CandidateCommit: strings.Repeat("a", 40),
-		Version:         "v1.2.3",
-		MainPackage:     "./cmd/example",
-		BinaryName:      "example",
-		Targets:         []ReceiptTarget{{OS: "linux", Arch: "amd64"}},
-		Compiler:        "go version go1.25.0 linux/amd64",
-		Artifacts: []ReceiptArtifact{{
-			Path:     artifactPath,
-			Filename: filename,
-			Target:   ReceiptTarget{OS: "linux", Arch: "amd64"},
-			SHA256:   hex.EncodeToString(digest[:]),
-		}},
-	}
-	path, err := WriteBuildReceipt(outputDir, receipt)
-	if err != nil {
-		t.Fatal(err)
-	}
-	loaded, err := LoadBuildReceipt(path)
-	if err != nil {
-		t.Fatal(err)
-	}
-	settings := BuildSettings{
-		MainPackage: "./cmd/example",
-		BinaryName:  "example",
-		Targets:     []string{"linux/amd64", "linux/amd64"},
-	}
-	if !loaded.MatchesBuild(repositoryDir, strings.Repeat("a", 40), "v1.2.3", settings) {
-		t.Fatalf("receipt does not match normalized build settings: %#v", loaded)
-	}
-	settings.BinaryName = "other"
-	if loaded.MatchesBuild(repositoryDir, strings.Repeat("a", 40), "v1.2.3", settings) {
-		t.Fatal("receipt matched changed build settings")
-	}
-	if err := os.WriteFile(artifactPath, []byte("changed artifact"), 0o755); err != nil {
-		t.Fatal(err)
-	}
-	if _, err := LoadBuildReceipt(path); err == nil || !strings.Contains(err.Error(), "hash changed") {
-		t.Fatalf("LoadBuildReceipt() error = %v, want changed-file hash error", err)
+func TestBuildReceiptRoundTripBindsRootAndNestedModuleIdentity(t *testing.T) {
+	for _, test := range []struct {
+		name       string
+		moduleDir  string
+		modulePath string
+		tag        string
+	}{
+		{name: "root", moduleDir: ".", modulePath: "example.com/receipt", tag: "v1.2.3"},
+		{name: "nested", moduleDir: "integrations/ckconfig", modulePath: "example.com/ckconfig", tag: "integrations/ckconfig/v1.2.3"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			outputDir := t.TempDir()
+			repositoryDir := t.TempDir()
+			moduleDir := repositoryDir
+			if test.moduleDir != "." {
+				moduleDir = filepath.Join(repositoryDir, filepath.FromSlash(test.moduleDir))
+				if err := os.MkdirAll(moduleDir, 0o755); err != nil {
+					t.Fatal(err)
+				}
+			}
+			filename := "example-v1.2.3-linux-amd64"
+			artifactPath := filepath.Join(outputDir, filename)
+			contents := []byte("built application")
+			if err := os.WriteFile(artifactPath, contents, 0o755); err != nil {
+				t.Fatal(err)
+			}
+			digest := sha256.Sum256(contents)
+			receipt := BuildReceipt{
+				SchemaVersion:   BuildReceiptSchemaVersion,
+				RepositoryDir:   repositoryDir,
+				ModuleDir:       moduleDir,
+				ModulePath:      test.modulePath,
+				Tag:             test.tag,
+				CandidateCommit: strings.Repeat("a", 40),
+				Version:         "v1.2.3",
+				MainPackage:     "./cmd/example",
+				BinaryName:      "example",
+				Targets:         []ReceiptTarget{{OS: "linux", Arch: "amd64"}},
+				Compiler:        "go version go1.25.0 linux/amd64",
+				Artifacts: []ReceiptArtifact{{
+					Path: artifactPath, Filename: filename,
+					Target: ReceiptTarget{OS: "linux", Arch: "amd64"}, SHA256: hex.EncodeToString(digest[:]),
+				}},
+			}
+			path, err := WriteBuildReceipt(outputDir, receipt)
+			if err != nil {
+				t.Fatal(err)
+			}
+			loaded, err := LoadBuildReceipt(path)
+			if err != nil {
+				t.Fatal(err)
+			}
+			settings := BuildSettings{MainPackage: "./cmd/example", BinaryName: "example", Targets: []string{"linux/amd64", "linux/amd64"}}
+			if !loaded.MatchesBuild(repositoryDir, strings.Repeat("a", 40), "v1.2.3", settings) {
+				t.Fatalf("receipt does not match normalized build settings: %#v", loaded)
+			}
+			aliases := t.TempDir()
+			repositoryAlias, outputAlias := filepath.Join(aliases, "repository"), filepath.Join(aliases, "output")
+			if err := os.Symlink(repositoryDir, repositoryAlias); err != nil {
+				t.Fatal(err)
+			}
+			if err := os.Symlink(outputDir, outputAlias); err != nil {
+				t.Fatal(err)
+			}
+			if !loaded.MatchesBuild(repositoryAlias, receipt.CandidateCommit, receipt.Version, settings) {
+				t.Fatal("receipt rejected an alias of its source repository")
+			}
+			if _, err := LoadBuildReceipt(filepath.Join(outputAlias, BuildReceiptName)); err != nil {
+				t.Fatalf("load receipt through output alias: %v", err)
+			}
+			if loaded.MatchesBuild(t.TempDir(), receipt.CandidateCommit, receipt.Version, settings) {
+				t.Fatal("receipt matched a different repository")
+			}
+			settings.BinaryName = "other"
+			if loaded.MatchesBuild(repositoryDir, strings.Repeat("a", 40), "v1.2.3", settings) {
+				t.Fatal("receipt matched changed build settings")
+			}
+			if err := os.WriteFile(artifactPath, []byte("changed artifact"), 0o755); err != nil {
+				t.Fatal(err)
+			}
+			if _, err := LoadBuildReceipt(path); err != nil {
+				t.Fatalf("receipt loading verified changed artifact bytes: %v", err)
+			}
+			if err := os.Remove(artifactPath); err != nil {
+				t.Fatal(err)
+			}
+			if _, err := LoadBuildReceipt(path); err != nil {
+				t.Fatalf("receipt loading required artifact bytes: %v", err)
+			}
+		})
 	}
 }
 
@@ -68,7 +109,9 @@ func TestLoadBuildReceiptRejectsUnknownFieldsAndMultipleValues(t *testing.T) {
 		body string
 		want string
 	}{
-		{name: "unknown field", body: `{"unexpected":true}`, want: "unknown field"},
+		{name: "unknown field", body: `{"schema_version":1,"unexpected":true}`, want: "unknown field"},
+		{name: "unversioned receipt", body: `{}`, want: "regenerate it with the updated build command"},
+		{name: "unknown schema", body: `{"schema_version":2}`, want: "regenerate it with the updated build command"},
 		{name: "multiple values", body: `{} {}`, want: "multiple JSON values"},
 	} {
 		t.Run(test.name, func(t *testing.T) {
@@ -82,3 +125,66 @@ func TestLoadBuildReceiptRejectsUnknownFieldsAndMultipleValues(t *testing.T) {
 		})
 	}
 }
+
+func TestWriteBuildReceiptRejectsInconsistentRecordedIdentity(t *testing.T) {
+	repositoryDir := t.TempDir()
+	moduleDir := filepath.Join(repositoryDir, "integrations", "ckconfig")
+	if err := os.MkdirAll(moduleDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	outputDir := t.TempDir()
+	receipt := BuildReceipt{
+		SchemaVersion: BuildReceiptSchemaVersion,
+		RepositoryDir: repositoryDir, ModuleDir: moduleDir, ModulePath: "example.com/ckconfig", Tag: "v1.2.3",
+		CandidateCommit: strings.Repeat("a", 40), Version: "v1.2.3", MainPackage: ".", BinaryName: "helper",
+		OutputDir: outputDir, Targets: []ReceiptTarget{{OS: "linux", Arch: "amd64"}}, Compiler: "go version fixture",
+		Artifacts: []ReceiptArtifact{{
+			Path: filepath.Join(outputDir, "helper-v1.2.3-linux-amd64"), Filename: "helper-v1.2.3-linux-amd64",
+			Target: ReceiptTarget{OS: "linux", Arch: "amd64"}, SHA256: strings.Repeat("a", 64),
+		}},
+	}
+	if _, err := WriteBuildReceipt(outputDir, receipt); err == nil || !strings.Contains(err.Error(), "full tag") {
+		t.Fatalf("WriteBuildReceipt() error = %v, want inconsistent full tag", err)
+	}
+}
+
+func TestLoadBuildReceiptRejectsMismatchedModuleIdentity(t *testing.T) {
+	repositoryDir := t.TempDir()
+	outputDir := t.TempDir()
+	artifactPath := filepath.Join(outputDir, "helper-v1.2.3-linux-amd64")
+	contents := []byte("fixture")
+	if err := os.WriteFile(artifactPath, contents, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	digest := sha256.Sum256(contents)
+	receipt := BuildReceipt{
+		SchemaVersion: BuildReceiptSchemaVersion,
+		RepositoryDir: repositoryDir, ModuleDir: repositoryDir, ModulePath: "example.com/receipt", Tag: "v1.2.3",
+		CandidateCommit: strings.Repeat("a", 40), Version: "v1.2.3", MainPackage: ".", BinaryName: "helper",
+		OutputDir: outputDir, Targets: []ReceiptTarget{{OS: "linux", Arch: "amd64"}}, Compiler: "go version fixture",
+		Artifacts: []ReceiptArtifact{{
+			Path: artifactPath, Filename: filepath.Base(artifactPath),
+			Target: ReceiptTarget{OS: "linux", Arch: "amd64"}, SHA256: hex.EncodeToString(digest[:]),
+		}},
+	}
+	contents, err := json.Marshal(receipt)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var fields map[string]any
+	if err := json.Unmarshal(contents, &fields); err != nil {
+		t.Fatal(err)
+	}
+	fields["module_dir"] = filepath.Join(repositoryDir, "integrations", "ckconfig")
+	contents, err = json.Marshal(fields)
+	if err != nil {
+		t.Fatal(err)
+	}
+	path := filepath.Join(outputDir, BuildReceiptName)
+	if err := os.WriteFile(path, contents, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := LoadBuildReceipt(path); err == nil || !strings.Contains(err.Error(), "inconsistent module identity") {
+		t.Fatalf("LoadBuildReceipt() error = %v, want inconsistent module identity", err)
+	}
+}

cmd/releasekit/local_module_test.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
+)
+
+func TestMainModuleWithoutDomainSupportsCheckBuildAndPageDelivery(t *testing.T) {
+	repository := newDeliveryBuildRepository(t)
+	writeRepositoryFile(t, repository, "go.mod", "module example\n\ngo 1.26.0\n")
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "Use local main module path")
+	state := &deliveryServerState{}
+	server := newDeliveryServer(t, state)
+	defer server.Close()
+	settings := cli.Settings{Product: "Example Product",
+		Build:    &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}},
+		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
+	}
+	writeDeliveryProfile(t, repository, settings)
+	for _, args := range [][]string{
+		{"check", "--repo", repository, "v1.2.3"},
+		{"build", "--repo", repository, "--output", filepath.Join(t.TempDir(), "assets"), "v1.2.3"},
+	} {
+		var stdout, stderr bytes.Buffer
+		if status := run(context.Background(), args, &stdout, &stderr); status != 0 || !strings.Contains(stdout.String(), "module example version v1.2.3 tag v1.2.3") {
+			t.Fatalf("%s status=%d stdout=%s stderr=%s", args[0], status, stdout.String(), stderr.String())
+		}
+	}
+	settings.Build = nil
+	writeDeliveryProfile(t, repository, settings)
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
+	cliGitRun(t, repository, "tag", "v1.2.3")
+	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
+	var stdout, stderr bytes.Buffer
+	if status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr); status != 0 || state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 0 {
+		t.Fatalf("page delivery status=%d creates=%d uploads=%d stderr=%s", status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stderr.String())
+	}
+}

cmd/releasekit/main.go

@@ -14,6 +14,9 @@ import (
 	"gitea.maximumdirect.net/eric/ReleaseKit"
 	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
 	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 )
 
 func main() {
@@ -29,6 +32,13 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 		fmt.Fprintf(stderr, "%v\n%s\n", err, cli.Usage)
 		return 2
 	}
+	if invocation.Command != cli.VersionCommand {
+		invocation.Repository, err = git.RepositoryRoot(ctx, invocation.Repository)
+		if err != nil {
+			fmt.Fprintf(stderr, "%v\n", err)
+			return 1
+		}
+	}
 
 	switch invocation.Command {
 	case cli.VersionCommand:
@@ -42,11 +52,15 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 		}
 		request := candidateRequest(invocation, settings, stderr)
 		if invocation.Command == cli.PublishAction {
+			if err := checkExpectedModule(ctx, invocation.Repository, invocation.ExpectedModule, settings.ModuleDir); err != nil {
+				fmt.Fprintf(stderr, "profile module selection: %v\n", err)
+				return 2
+			}
 			request.ExpectedPushURL = settings.ExpectedPushURL
-			fmt.Fprintf(stderr, "validating and publishing %s\n", invocation.Version)
+			fmt.Fprintf(stderr, "validating and publishing module %s version %s\n", selectedModuleLabel(settings.ModuleDir), invocation.Version)
 			result, err := releasekit.Publish(ctx, request)
 			if err != nil {
-				fmt.Fprintf(stderr, "publication state=%s phase=%s version=%s commit=%s tag-object=%s endpoint=%q: %s\n", result.State, result.Phase, result.Version, result.CandidateCommit, result.TagObject, result.Endpoint, candidateFailureText(err))
+				fmt.Fprintf(stderr, "publication state=%s phase=%s module=%s module-dir=%s version=%s tag=%s commit=%s tag-object=%s endpoint=%q: %s\n", result.State, result.Phase, result.ModulePath, result.ModuleDir, result.Version, result.Tag, result.CandidateCommit, result.TagObject, result.Endpoint, candidateFailureText(err))
 				if errors.Is(err, releasekit.ErrInvalidVersion) {
 					return 2
 				}
@@ -55,18 +69,18 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 				}
 				return 1
 			}
-			fmt.Fprintf(stdout, "published %s at %s (tag object %s)\n", result.Version, result.CandidateCommit, result.TagObject)
+			fmt.Fprintf(stdout, "published %s as %s at %s (tag object %s)\n", result.Version, result.Tag, result.CandidateCommit, result.TagObject)
 			return 0
 		}
 		candidate, err := releasekit.Check(ctx, request)
 		if err != nil {
-			fmt.Fprintf(stderr, "check failed: %s\n", candidateFailureText(err))
+			fmt.Fprintf(stderr, "check failed module=%s module-dir=%s version=%s tag=%s commit=%s: %s\n", candidate.ModulePath, candidate.ModuleDir, candidate.Version, candidate.Tag, candidate.Commit, candidateFailureText(err))
 			if errors.Is(err, releasekit.ErrInvalidVersion) {
 				return 2
 			}
 			return 1
 		}
-		fmt.Fprintf(stdout, "local candidate %s at %s is valid\n", candidate.Version, candidate.Commit)
+		fmt.Fprintf(stdout, "local candidate module %s version %s tag %s at %s is valid\n", candidate.ModulePath, candidate.Version, candidate.Tag, candidate.Commit)
 		return 0
 	case cli.BuildAction:
 		settings, err := cli.LoadSettings(invocation.Repository, invocation.ConfigPath)
@@ -80,6 +94,7 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 		}
 		result, err := releasekit.Build(ctx, releasekit.BuildRequest{
 			RepositoryDir: invocation.Repository,
+			ModuleDir:     settings.ModuleDir,
 			Version:       invocation.Version,
 			Spec:          *configuredBuildSpec(settings.Build),
 			OutputDir:     invocation.OutputDir,
@@ -92,7 +107,7 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 			}
 		}
 		if err != nil {
-			fmt.Fprintf(stderr, "build failed at %s: %v\n", result.CandidateCommit, err)
+			fmt.Fprintf(stderr, "build failed module=%s module-dir=%s version=%s tag=%s commit=%s: %v\n", result.ModulePath, result.ModuleDir, result.Version, result.Tag, result.CandidateCommit, err)
 			for _, artifact := range result.Artifacts {
 				fmt.Fprintf(stderr, "built %s %s\n", artifact.Filename, artifact.SHA256)
 			}
@@ -102,7 +117,7 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 			return 1
 		}
 		if len(result.Targets) == 0 {
-			fmt.Fprintf(stdout, "no build targets selected for %s at %s\n", result.Version, result.CandidateCommit)
+			fmt.Fprintf(stdout, "no build targets selected for module %s version %s tag %s at %s\n", result.ModulePath, result.Version, result.Tag, result.CandidateCommit)
 			return 0
 		}
 		receipt := receiptFromBuild(result)
@@ -120,7 +135,7 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 			fmt.Fprintln(stderr, "build receipt does not match the selected source and build settings")
 			return 1
 		}
-		fmt.Fprintf(stdout, "built %d artifacts for %s at %s with %s\n", len(result.Artifacts), result.Version, result.CandidateCommit, result.Compiler)
+		fmt.Fprintf(stdout, "built %d artifacts for module %s version %s tag %s at %s with %s\n", len(result.Artifacts), result.ModulePath, result.Version, result.Tag, result.CandidateCommit, result.Compiler)
 		for _, artifact := range result.Artifacts {
 			fmt.Fprintf(stdout, "%s %s\n", artifact.Filename, artifact.SHA256)
 		}
@@ -137,6 +152,7 @@ func run(ctx context.Context, args []string, stdout, stderr io.Writer) int {
 func candidateRequest(invocation cli.Invocation, settings cli.Settings, output io.Writer) releasekit.ReleaseRequest {
 	request := releasekit.ReleaseRequest{
 		RepositoryDir: invocation.Repository,
+		ModuleDir:     settings.ModuleDir,
 		Product:       settings.Product,
 		Version:       invocation.Version,
 		Remote:        settings.Remote,
@@ -147,9 +163,13 @@ func candidateRequest(invocation cli.Invocation, settings cli.Settings, output i
 	if len(settings.Checks) != 0 {
 		checks := settings.Checks
 		request.AdditionalChecks = func(ctx context.Context, candidate releasekit.Candidate) error {
-			return cli.RunChecks(ctx, candidate.RepositoryDir, checks, map[string]string{
-				"RELEASEKIT_VERSION":   candidate.Version,
-				"RELEASEKIT_CANDIDATE": candidate.Commit,
+			return cli.RunChecks(ctx, candidate.ModuleDir, checks, map[string]string{
+				"RELEASEKIT_VERSION":        candidate.Version,
+				"RELEASEKIT_CANDIDATE":      candidate.Commit,
+				"RELEASEKIT_REPOSITORY_DIR": candidate.RepositoryDir,
+				"RELEASEKIT_MODULE_DIR":     candidate.ModuleDir,
+				"RELEASEKIT_MODULE_PATH":    candidate.ModulePath,
+				"RELEASEKIT_TAG":            candidate.Tag,
 			}, output, output)
 		}
 	}
@@ -161,7 +181,8 @@ func validationSpec(settings *cli.ValidationSettings) releasekit.ValidationSpec
 		return releasekit.ValidationSpec{}
 	}
 	result := releasekit.ValidationSpec{
-		GoFormat: settings.GoFormat,
+		SharedFiles: copyStringsPreservingEmpty(settings.SharedFiles),
+		GoFormat:    settings.GoFormat,
 		ModuleDistribution: releasekit.ModuleDistributionValidationSpec{
 			WorkspaceFiles:    settings.ModuleDistribution.WorkspaceFiles,
 			LocalReplacements: settings.ModuleDistribution.LocalReplacements,
@@ -199,6 +220,42 @@ func candidateFailureText(err error) string {
 	return err.Error()
 }
 
+func checkExpectedModule(ctx context.Context, repositoryDir, expectedModule, profileModule string) error {
+	if expectedModule == "" {
+		return nil
+	}
+	commit, err := git.CaptureHead(ctx, repositoryDir)
+	if err != nil {
+		return err
+	}
+	expected, err := releaseidentity.ResolveCommittedSelection(ctx, repositoryDir, expectedModule, commit)
+	if err != nil {
+		return fmt.Errorf("normalize expected module %q: %w", expectedModule, err)
+	}
+	selected, err := releaseidentity.ResolveCommittedSelection(ctx, repositoryDir, profileModule, commit)
+	if err != nil {
+		return fmt.Errorf("normalize profile module %q: %w", profileModule, err)
+	}
+	if expected.ModuleSubdir != selected.ModuleSubdir {
+		return fmt.Errorf("expected module %q resolves to %q, but the profile selects %q", expectedModule, expected.ModuleSubdir, selected.ModuleSubdir)
+	}
+	return nil
+}
+
+func selectedModuleLabel(moduleDir string) string {
+	if moduleDir == "" {
+		return "."
+	}
+	return moduleDir
+}
+
+func copyStringsPreservingEmpty(values []string) []string {
+	if values == nil {
+		return nil
+	}
+	return append([]string{}, values...)
+}
+
 func runDelivery(ctx context.Context, invocation cli.Invocation, stdout, stderr io.Writer) int {
 	settings, err := cli.LoadSettings(invocation.Repository, invocation.ConfigPath)
 	if err != nil {
@@ -211,9 +268,10 @@ func runDelivery(ctx context.Context, invocation cli.Invocation, stdout, stderr
 func runCIDelivery(ctx context.Context, invocation cli.Invocation, stdout, stderr io.Writer) int {
 	err := releasekit.PrepareTaggedCheckout(ctx, releasekit.TaggedCheckoutRequest{
 		RepositoryDir:  invocation.Repository,
-		Version:        invocation.Version,
+		Tag:            invocation.ExpectedTag,
 		Remote:         invocation.Remote,
 		ExpectedCommit: invocation.Commit,
+		VerifyOnly:     invocation.Prepared,
 	})
 	if err != nil {
 		fmt.Fprintf(stderr, "prepare tagged checkout: %v\n", err)
@@ -228,12 +286,19 @@ func runCIDelivery(ctx context.Context, invocation cli.Invocation, stdout, stder
 		fmt.Fprintf(stderr, "load profile: %v\n", err)
 		return 2
 	}
+	if err := checkExpectedModule(ctx, invocation.Repository, invocation.ExpectedModule, settings.ModuleDir); err != nil {
+		fmt.Fprintf(stderr, "profile module selection: %v\n", err)
+		return 2
+	}
 	destination, status := deliveryDestination(settings, stderr)
 	if status != 0 {
 		return status
 	}
 	if settings.Build != nil && len(settings.Build.Targets) != 0 {
-		if err := releasekit.PrepareBuildDependencies(ctx, invocation.Repository); err != nil {
+		if err := releasekit.PrepareBuildDependencies(ctx, releasekit.DependencyPreparationRequest{
+			RepositoryDir: invocation.Repository,
+			ModuleDir:     settings.ModuleDir,
+		}); err != nil {
 			fmt.Fprintf(stderr, "prepare build dependencies: %v\n", err)
 			return 1
 		}
@@ -282,10 +347,17 @@ func deliverWithDestination(ctx context.Context, invocation cli.Invocation, sett
 	}
 	if hasTargets {
 		if invocation.AssetsDir != "" {
-			assetsDir := invocation.AssetsDir
-			if !filepath.IsAbs(assetsDir) {
-				assetsDir = filepath.Join(invocation.Repository, assetsDir)
+			commit, err := git.CaptureHead(ctx, invocation.Repository)
+			if err != nil {
+				fmt.Fprintf(stderr, "capture asset source commit: %v\n", err)
+				return 1
 			}
+			selection, err := releaseidentity.ResolveCommittedSelection(ctx, invocation.Repository, settings.ModuleDir, commit)
+			if err != nil {
+				fmt.Fprintf(stderr, "resolve asset module directory: %v\n", err)
+				return 1
+			}
+			assetsDir := artifact.OutputDirectory(selection.ModuleDir, invocation.AssetsDir)
 			receipt, err := cli.LoadBuildReceipt(filepath.Join(assetsDir, cli.BuildReceiptName))
 			if err != nil {
 				fmt.Fprintf(stderr, "load verified build receipt: %v\n", err)
@@ -301,15 +373,17 @@ func deliverWithDestination(ctx context.Context, invocation cli.Invocation, sett
 
 	result, err := releasekit.Deliver(ctx, releasekit.DeliveryRequest{
 		RepositoryDir: invocation.Repository,
+		ModuleDir:     settings.ModuleDir,
 		Product:       settings.Product,
 		Version:       invocation.Version,
+		ExpectedTag:   invocation.ExpectedTag,
 		Destination:   destination,
 		Build:         buildSpec,
 		Prebuilt:      prebuilt,
 		Output:        stderr,
 	})
 	if err != nil {
-		fmt.Fprintf(stderr, "delivery state=%s version=%s commit=%s url=%s: %v\n", result.State, result.Version, result.CandidateCommit, result.ReleaseURL, err)
+		fmt.Fprintf(stderr, "delivery state=%s module=%s module-dir=%s version=%s tag=%s commit=%s url=%s: %v\n", result.State, result.ModulePath, result.ModuleDir, result.Version, result.Tag, result.CandidateCommit, result.ReleaseURL, err)
 		writeDeliveryAssets(stderr, result)
 		writeDeliveryRecovery(stderr, result)
 		if errors.Is(err, releasekit.ErrInvalidVersion) {
@@ -320,7 +394,7 @@ func deliverWithDestination(ctx context.Context, invocation cli.Invocation, sett
 		}
 		return 1
 	}
-	fmt.Fprintf(stdout, "delivered %s at %s (state %s)\n", result.Version, result.CandidateCommit, result.State)
+	fmt.Fprintf(stdout, "delivered module %s version %s tag %s at %s (state %s)\n", result.ModulePath, result.Version, result.Tag, result.CandidateCommit, result.State)
 	if result.ReleaseURL != "" {
 		fmt.Fprintf(stdout, "release: %s\n", result.ReleaseURL)
 	}
@@ -342,13 +416,13 @@ func writeDeliveryAssets(output io.Writer, result releasekit.DeliveryResult) {
 func writeDeliveryRecovery(output io.Writer, result releasekit.DeliveryResult) {
 	switch result.State {
 	case releasekit.DeliveryNotAttempted:
-		fmt.Fprintln(output, "recovery: fix the local or preflight failure before retrying; no remote write was attempted")
+		fmt.Fprintf(output, "recovery: fix the local or preflight failure for module %s version %s tag %s before retrying; no remote write was attempted\n", result.ModulePath, result.Version, result.Tag)
 	case releasekit.DeliveryPartial:
-		fmt.Fprintln(output, "recovery: fix the reported cause, then retry this version")
+		fmt.Fprintf(output, "recovery: fix the reported cause, then retry module %s version %s tag %s\n", result.ModulePath, result.Version, result.Tag)
 	case releasekit.DeliveryConflict:
-		fmt.Fprintln(output, "recovery: investigate conflicting hosted content; use a new version if the source or published contents need correction")
+		fmt.Fprintf(output, "recovery: investigate conflicting hosted content for module %s version %s tag %s; use a new version if the source or published contents need correction\n", result.ModulePath, result.Version, result.Tag)
 	case releasekit.DeliveryUnknown:
-		fmt.Fprintln(output, "recovery: resolve the remote state before retrying")
+		fmt.Fprintf(output, "recovery: resolve the remote state for module %s version %s tag %s before retrying\n", result.ModulePath, result.Version, result.Tag)
 	default:
 		return
 	}
@@ -359,7 +433,8 @@ func writeDeliveryRecovery(output io.Writer, result releasekit.DeliveryResult) {
 
 func buildResultFromReceipt(receipt cli.BuildReceipt) *releasekit.BuildResult {
 	result := &releasekit.BuildResult{
-		RepositoryDir: receipt.RepositoryDir, CandidateCommit: receipt.CandidateCommit, SourceVerified: receipt.SourceVerified,
+		RepositoryDir: receipt.RepositoryDir, ModuleDir: receipt.ModuleDir, ModulePath: receipt.ModulePath, Tag: receipt.Tag,
+		CandidateCommit: receipt.CandidateCommit, SourceVerified: receipt.SourceVerified,
 		Version: receipt.Version, MainPackage: receipt.MainPackage, BinaryName: receipt.BinaryName,
 		OutputDir: receipt.OutputDir, Compiler: receipt.Compiler,
 	}
@@ -393,7 +468,11 @@ func configuredBuildSpec(settings *cli.BuildSettings) *releasekit.BuildSpec {
 
 func receiptFromBuild(result releasekit.BuildResult) cli.BuildReceipt {
 	receipt := cli.BuildReceipt{
+		SchemaVersion:   cli.BuildReceiptSchemaVersion,
 		RepositoryDir:   result.RepositoryDir,
+		ModuleDir:       result.ModuleDir,
+		ModulePath:      result.ModulePath,
+		Tag:             result.Tag,
 		CandidateCommit: result.CandidateCommit,
 		SourceVerified:  result.SourceVerified,
 		Version:         result.Version,

cmd/releasekit/main_test.go

@@ -15,6 +15,7 @@ import (
 	"path/filepath"
 	"runtime"
 	"strings"
+	"sync"
 	"testing"
 
 	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
@@ -51,6 +52,13 @@ func TestUnknownCommand(t *testing.T) {
 func TestCheckCommandBindsConfiguredChecksToCapturedCandidate(t *testing.T) {
 	raceSelected := racePrerequisitesAvailable()
 	repository := newCLIRepository(t)
+	moduleDir := filepath.Join(repository, "integrations", "ckconfig")
+	writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", "module example.com/ckconfig\n\ngo 1.25.0\n")
+	writeRepositoryFile(t, repository, "integrations/ckconfig/docs/releases/v1.2.3.md", "# Example Product v1.2.3\n\nNested release note.\n")
+	writeRepositoryFile(t, repository, "integrations/ckconfig/fixture_test.go", "package ckconfig\nimport \"testing\"\nfunc TestFixture(t *testing.T) {}\n")
+	writeRepositoryFile(t, repository, "integrations/ckconfig/race_fixture_test.go", "//go:build race\n\npackage ckconfig\n\nimport (\n\t\"os\"\n\t\"testing\"\n)\n\nfunc TestRaceBuildSelection(t *testing.T) {\n\tmarker := os.Getenv(\"RELEASEKIT_RACE_MARKER\")\n\tif marker == \"\" { return }\n\tif err := os.WriteFile(marker, []byte(\"race enabled\"), 0o600); err != nil { t.Fatal(err) }\n}\n")
+	cliGitRun(t, repository, "add", "integrations/ckconfig")
+	cliGitRun(t, repository, "commit", "-m", "add nested module candidate")
 	profilePath := filepath.Join(t.TempDir(), "profile with spaces.json")
 	orderPath := filepath.Join(t.TempDir(), "check-order")
 	t.Setenv("RELEASEKIT_CHECK_ORDER_FILE", orderPath)
@@ -70,9 +78,10 @@ func TestCheckCommandBindsConfiguredChecksToCapturedCandidate(t *testing.T) {
 		}
 	}
 	settings := cli.Settings{
-		Product: "Example Product",
-		Remote:  "origin",
-		Checks:  []cli.CheckCommand{check("first"), check("second")},
+		Product:   "Example Product",
+		ModuleDir: "integrations/ckconfig",
+		Remote:    "origin",
+		Checks:    []cli.CheckCommand{check("first"), check("second")},
 	}
 	if raceSelected {
 		settings.Validation = &cli.ValidationSettings{Go: cli.GoValidationSettings{Race: true}}
@@ -102,7 +111,10 @@ func TestCheckCommandBindsConfiguredChecksToCapturedCandidate(t *testing.T) {
 	if got, want := strings.Count(stderr.String(), "v1.2.3|"+commit), 2; got != want {
 		t.Fatalf("configured checks received captured candidate %d times, want %d; stderr=%q", got, want, stderr.String())
 	}
-	if want := fmt.Sprintf("local candidate v1.2.3 at %s is valid\n", commit); stdout.String() != want {
+	if !strings.Contains(stderr.String(), fmt.Sprintf("%s|%s|%s|example.com/ckconfig|integrations/ckconfig/v1.2.3", moduleDir, repository, moduleDir)) {
+		t.Fatalf("configured checks did not receive the selected module directory and identity: %q", stderr.String())
+	}
+	if want := fmt.Sprintf("local candidate module example.com/ckconfig version v1.2.3 tag integrations/ckconfig/v1.2.3 at %s is valid\n", commit); stdout.String() != want {
 		t.Fatalf("stdout = %q, want %q", stdout.String(), want)
 	}
 	if raceSelected {
@@ -154,6 +166,40 @@ func TestCandidateRequestMapsGoValidation(t *testing.T) {
 	}
 }
 
+func TestCandidateRequestPreservesModuleAndSharedFileSelection(t *testing.T) {
+	for _, test := range []struct {
+		name       string
+		shared     []string
+		wantNil    bool
+		wantValues []string
+	}{
+		{name: "nil", wantNil: true},
+		{name: "empty", shared: []string{}},
+		{name: "selected", shared: []string{"README.md", "docs/policy.md"}, wantValues: []string{"README.md", "docs/policy.md"}},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			request := candidateRequest(cli.Invocation{Repository: "repository", Version: "v1.2.3"}, cli.Settings{
+				ModuleDir:  "integrations/ckconfig",
+				Validation: &cli.ValidationSettings{SharedFiles: test.shared},
+			}, nil)
+			if request.ModuleDir != "integrations/ckconfig" {
+				t.Fatalf("module selection = %q", request.ModuleDir)
+			}
+			if (request.Validation.SharedFiles == nil) != test.wantNil {
+				t.Fatalf("mapped shared_files = %#v, want nil=%t", request.Validation.SharedFiles, test.wantNil)
+			}
+			if len(request.Validation.SharedFiles) != len(test.wantValues) {
+				t.Fatalf("mapped shared_files = %#v, want %#v", request.Validation.SharedFiles, test.wantValues)
+			}
+			for i, path := range test.wantValues {
+				if request.Validation.SharedFiles[i] != path {
+					t.Fatalf("mapped shared_files = %#v, want %#v", request.Validation.SharedFiles, test.wantValues)
+				}
+			}
+		})
+	}
+}
+
 func TestValidationSpecPreservesMarkdownObjectSelection(t *testing.T) {
 	for _, test := range []struct {
 		name     string
@@ -172,6 +218,33 @@ func TestValidationSpecPreservesMarkdownObjectSelection(t *testing.T) {
 	}
 }
 
+func TestPublishExpectedModuleRejectsMismatchBeforeProductCommands(t *testing.T) {
+	repository := newCLIRepository(t)
+	writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", "module example.com/ckconfig\n\ngo 1.25.0\n")
+	marker := filepath.Join(t.TempDir(), "product-command-ran")
+	profile, err := json.Marshal(cli.Settings{
+		Product: "Example Product",
+		Checks:  []cli.CheckCommand{{Args: []string{"sh", "-c", "touch " + marker}}},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	writeRepositoryFile(t, repository, "releasekit.json", string(profile))
+	cliGitRun(t, repository, "add", "releasekit.json", "integrations/ckconfig/go.mod")
+	cliGitRun(t, repository, "commit", "-m", "configure root release profile")
+	var stdout, stderr bytes.Buffer
+	status := run(context.Background(), []string{"publish", "--repo", repository, "--expected-module", "integrations/ckconfig", "v1.2.3"}, &stdout, &stderr)
+	if status != 2 || !strings.Contains(stderr.String(), "profile module selection") {
+		t.Fatalf("publish status=%d stdout=%q stderr=%q, want module-selection error", status, stdout.String(), stderr.String())
+	}
+	if _, err := os.Stat(marker); !os.IsNotExist(err) {
+		t.Fatalf("product command ran despite module mismatch: stat error=%v", err)
+	}
+	if err := exec.Command("git", "-C", repository, "show-ref", "--verify", "refs/tags/v1.2.3").Run(); err == nil {
+		t.Fatal("module mismatch created a release tag")
+	}
+}
+
 func TestCandidateCommandsRunMarkdownProfile(t *testing.T) {
 	repository := newCLIRepository(t)
 	profile, err := json.Marshal(cli.Settings{
@@ -328,10 +401,10 @@ printf '%s %s\n' "$version" "$candidate" >> "$RELEASEKIT_COMPATIBILITY_LOG"
 	}
 	commit := cliGitOutput(t, repository, "rev-parse", "HEAD")
 	tagObject := cliGitOutput(t, repository, "rev-parse", "refs/tags/v1.2.3")
-	if want := fmt.Sprintf("published v1.2.3 at %s (tag object %s)\n", commit, tagObject); stdout.String() != want {
+	if want := fmt.Sprintf("published v1.2.3 as v1.2.3 at %s (tag object %s)\n", commit, tagObject); stdout.String() != want {
 		t.Fatalf("stdout = %q, want %q", stdout.String(), want)
 	}
-	if !bytes.Contains(stderr.Bytes(), []byte("validating and publishing v1.2.3")) || !bytes.Contains(stderr.Bytes(), []byte("example.com/cli-candidate")) {
+	if !bytes.Contains(stderr.Bytes(), []byte("validating and publishing module . version v1.2.3")) || !bytes.Contains(stderr.Bytes(), []byte("example.com/cli-candidate")) {
 		t.Fatalf("stderr does not show publication progress and validation: %q", stderr.String())
 	}
 	if got := cliGitOutput(t, remote, "rev-parse", "refs/tags/v1.2.3"); got != tagObject {
@@ -351,6 +424,47 @@ printf '%s %s\n' "$version" "$candidate" >> "$RELEASEKIT_COMPATIBILITY_LOG"
 	}
 }
 
+func TestBuildCommandUsesProfileModuleSelection(t *testing.T) {
+	repository := newCLIRepository(t)
+	writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", "module example.com/ckconfig\n\ngo 1.25.0\n")
+	profile, err := json.Marshal(cli.Settings{
+		Product:   "Example Product",
+		ModuleDir: "integrations/ckconfig",
+		Build:     &cli.BuildSettings{},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	writeRepositoryFile(t, repository, "releasekit.json", string(profile))
+	var stdout, stderr bytes.Buffer
+	status := run(context.Background(), []string{"build", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
+	if status != 0 {
+		t.Fatalf("build status=%d stdout=%q stderr=%q", status, stdout.String(), stderr.String())
+	}
+	if !strings.Contains(stdout.String(), "no build targets selected for module example.com/ckconfig version v1.2.3 tag integrations/ckconfig/v1.2.3") {
+		t.Fatalf("build did not use profile module selection: %q", stdout.String())
+	}
+}
+
+func TestProfileSharedFilesRequireCommittedFilesWithoutEnablingChecks(t *testing.T) {
+	repository := newCLIRepository(t)
+	profile, err := json.Marshal(cli.Settings{
+		Product:    "Example Product",
+		Validation: &cli.ValidationSettings{SharedFiles: []string{"docs/shared.md"}},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	writeRepositoryFile(t, repository, "releasekit.json", string(profile))
+	cliGitRun(t, repository, "add", "releasekit.json")
+	cliGitRun(t, repository, "commit", "-m", "configure an explicit shared file")
+	var stdout, stderr bytes.Buffer
+	status := run(context.Background(), []string{"check", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
+	if status != 1 || !strings.Contains(stderr.String(), "shared-files") || !strings.Contains(stderr.String(), "docs/shared.md") {
+		t.Fatalf("check status=%d stdout=%q stderr=%q, want missing shared-files failure", status, stdout.String(), stderr.String())
+	}
+}
+
 func TestBuildCommandWritesValidatedReceiptForConfiguredArtifacts(t *testing.T) {
 	repository := newCLIBuildRepository(t, `package main
 
@@ -381,7 +495,7 @@ func main() {
 		BinaryName:  "fixture",
 		Targets:     []string{fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)},
 	}
-	if !receipt.MatchesBuild(repository, commit, "v1.2.3", settings) || len(receipt.Artifacts) != 1 {
+	if receipt.SchemaVersion != cli.BuildReceiptSchemaVersion || !receipt.MatchesBuild(repository, commit, "v1.2.3", settings) || len(receipt.Artifacts) != 1 {
 		t.Fatalf("build receipt = %#v", receipt)
 	}
 	if !bytes.Contains(stdout.Bytes(), []byte(receipt.Artifacts[0].Filename)) || !bytes.Contains(stdout.Bytes(), []byte(receipt.Artifacts[0].SHA256)) {
@@ -440,7 +554,12 @@ func TestCandidateCheckHelper(t *testing.T) {
 			os.Exit(9)
 		}
 	}
-	fmt.Fprintf(os.Stdout, "%s|%s", os.Getenv("RELEASEKIT_VERSION"), os.Getenv("RELEASEKIT_CANDIDATE"))
+	workdir, err := os.Getwd()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(9)
+	}
+	fmt.Fprintf(os.Stdout, "%s|%s|%s|%s|%s|%s|%s", os.Getenv("RELEASEKIT_VERSION"), os.Getenv("RELEASEKIT_CANDIDATE"), workdir, os.Getenv("RELEASEKIT_REPOSITORY_DIR"), os.Getenv("RELEASEKIT_MODULE_DIR"), os.Getenv("RELEASEKIT_MODULE_PATH"), os.Getenv("RELEASEKIT_TAG"))
 	os.Exit(0)
 }
 
@@ -523,7 +642,7 @@ func TestDeliverPageOnlyCreatesAndReusesRelease(t *testing.T) {
 		Delivery:   &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	}
 	writeDeliveryProfile(t, repository, settings)
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3") // Historical lightweight tags are valid delivery inputs.
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	for attempt := 0; attempt < 2; attempt++ {
@@ -536,11 +655,11 @@ func TestDeliverPageOnlyCreatesAndReusesRelease(t *testing.T) {
 			t.Fatalf("delivery output = %q", stdout.String())
 		}
 	}
-	if state.releaseCreates != 1 || state.assetUploads != 0 || state.assetListReads != 0 {
-		t.Fatalf("page-only calls = creates:%d asset uploads:%d asset reads:%d", state.releaseCreates, state.assetUploads, state.assetListReads)
+	if state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 0 || state.snapshot().assetListReads != 0 {
+		t.Fatalf("page-only calls = creates:%d asset uploads:%d asset reads:%d", state.snapshot().releaseCreates, state.snapshot().assetUploads, state.snapshot().assetListReads)
 	}
-	if state.noteBody != "# Example Product v1.2.3\n\nRelease note.\n" {
-		t.Fatalf("hosted note body = %q", state.noteBody)
+	if state.snapshot().noteBody != "# Example Product v1.2.3\n\nRelease note.\n" {
+		t.Fatalf("hosted note body = %q", state.snapshot().noteBody)
 	}
 }
 
@@ -557,7 +676,7 @@ func TestDeliverBuildsTaggedArtifactsAndReusesAssets(t *testing.T) {
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	}
 	writeDeliveryProfile(t, repository, settings)
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	cliGitRun(t, repository, "checkout", "--detach", "v1.2.3")
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
@@ -571,14 +690,15 @@ func TestDeliverBuildsTaggedArtifactsAndReusesAssets(t *testing.T) {
 			t.Fatalf("second delivery did not report matching assets: %q", stdout.String())
 		}
 	}
-	if state.releaseCreates != 1 || state.assetUploads != 2 {
-		t.Fatalf("delivery calls = creates:%d asset uploads:%d", state.releaseCreates, state.assetUploads)
+	observed := state.snapshot()
+	if observed.releaseCreates != 1 || observed.assetUploads != 2 {
+		t.Fatalf("delivery calls = creates:%d asset uploads:%d", observed.releaseCreates, observed.assetUploads)
 	}
-	if _, ok := state.assets["helper-v1.2.3-linux-amd64"]; !ok {
-		t.Fatalf("binary was not uploaded: %#v", state.assets)
+	if _, ok := observed.assets["helper-v1.2.3-linux-amd64"]; !ok {
+		t.Fatalf("binary was not uploaded: %#v", observed.assets)
 	}
-	if _, ok := state.assets["SHA256SUMS"]; !ok {
-		t.Fatalf("checksum manifest was not uploaded: %#v", state.assets)
+	if _, ok := observed.assets["SHA256SUMS"]; !ok {
+		t.Fatalf("checksum manifest was not uploaded: %#v", observed.assets)
 	}
 	if entries, err := os.ReadDir(temporaryRoot); err != nil || len(entries) != 0 {
 		t.Fatalf("facade-owned build output remains after delivery: entries=%v error=%v", entries, err)
@@ -599,19 +719,21 @@ func TestCIDeliverLoadsTaggedProfileAndSkipsUnavailablePageOnlyDependencies(t *t
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	})
 	expectedCommit := pushTaggedCLIRepository(t, repository)
-	state.commit = expectedCommit
+	state.update(func(state *deliveryServerData) { state.commit = expectedCommit })
 	writeDeliveryProfileAt(t, repository, "profiles/ci-delivery.json", cli.Settings{Product: "Later Branch Profile"})
+	cliGitRun(t, repository, "checkout", "--detach", expectedCommit)
+	cliGitRun(t, repository, "remote", "remove", "origin")
 
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	t.Setenv("GOPROXY", "off")
 	t.Setenv("GOSUMDB", "off")
 	var stdout, stderr bytes.Buffer
-	args := []string{"ci-deliver", "--repo", repository, "--config", "profiles/ci-delivery.json", "--commit", expectedCommit, "v1.2.3"}
+	args := []string{"ci-deliver", "--repo", repository, "--config", "profiles/ci-delivery.json", "--prepared", "--commit", expectedCommit, "v1.2.3"}
 	if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
 		t.Fatalf("run() status=%d stdout=%q stderr=%q", status, stdout.String(), stderr.String())
 	}
-	if state.releaseCreates != 1 || state.apiRequests == 0 {
-		t.Fatalf("page delivery did not reach the server: creates=%d requests=%d", state.releaseCreates, state.apiRequests)
+	if state.snapshot().releaseCreates != 1 || state.snapshot().apiRequests == 0 {
+		t.Fatalf("page delivery did not reach the server: creates=%d requests=%d", state.snapshot().releaseCreates, state.snapshot().apiRequests)
 	}
 	if got := cliGitOutput(t, repository, "rev-parse", "HEAD"); got != expectedCommit {
 		t.Fatalf("prepared HEAD = %s, want %s", got, expectedCommit)
@@ -632,7 +754,7 @@ func TestCIDeliverRejectsWrongCommitBeforeGoOrHostedRequests(t *testing.T) {
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	})
 	expectedCommit := pushTaggedCLIRepository(t, repository)
-	state.commit = expectedCommit
+	state.update(func(state *deliveryServerData) { state.commit = expectedCommit })
 
 	shimDir := t.TempDir()
 	markerPath := filepath.Join(shimDir, "go-invoked")
@@ -655,8 +777,57 @@ func TestCIDeliverRejectsWrongCommitBeforeGoOrHostedRequests(t *testing.T) {
 	if _, err := os.Stat(markerPath); !os.IsNotExist(err) {
 		t.Fatalf("Go was invoked before commit agreement: %v", err)
 	}
-	if state.apiRequests != 0 {
-		t.Fatalf("hosted API requests = %d, want 0", state.apiRequests)
+	if state.snapshot().apiRequests != 0 {
+		t.Fatalf("hosted API requests = %d, want 0", state.snapshot().apiRequests)
+	}
+}
+
+func TestCIDeliverRejectsExpectedModuleMismatchBeforeDependencyPreparation(t *testing.T) {
+	repository := newCLIRepository(t)
+	if err := os.MkdirAll(filepath.Join(repository, "integrations", "other"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(filepath.Join(repository, "integrations", "expected"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	writeRepositoryFile(t, repository, "integrations/other/go.mod", "module example.com/other\n\ngo 1.25.0\n")
+	writeRepositoryFile(t, repository, "integrations/expected/go.mod", "module example.com/expected\n\ngo 1.25.0\n")
+	cliGitRun(t, repository, "add", "integrations")
+	cliGitRun(t, repository, "commit", "-m", "add module profiles")
+
+	state := &deliveryServerState{}
+	server := newDeliveryServer(t, state)
+	defer server.Close()
+	writeDeliveryProfile(t, repository, cli.Settings{
+		Product:   "Example Product",
+		ModuleDir: "integrations/other",
+		Build:     &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}},
+		Delivery:  &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
+	})
+	expectedCommit := pushTaggedCLIRepository(t, repository)
+	state.update(func(state *deliveryServerData) { state.commit = expectedCommit })
+	shimDir := t.TempDir()
+	markerPath := filepath.Join(shimDir, "go-invoked")
+	goShim := "#!/bin/sh\n: > \"$RELEASEKIT_GO_MARKER\"\nexit 99\n"
+	if err := os.WriteFile(filepath.Join(shimDir, "go"), []byte(goShim), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("RELEASEKIT_GO_MARKER", markerPath)
+	t.Setenv("PATH", shimDir+string(os.PathListSeparator)+os.Getenv("PATH"))
+	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
+	var stdout, stderr bytes.Buffer
+	args := []string{"ci-deliver", "--repo", repository, "--expected-module", "integrations/expected", "--commit", expectedCommit, "v1.2.3"}
+	if status := run(context.Background(), args, &stdout, &stderr); status != 2 {
+		t.Fatalf("run() status=%d stdout=%q stderr=%q, want profile-selection error", status, stdout.String(), stderr.String())
+	}
+	if !strings.Contains(stderr.String(), "profile module selection") {
+		t.Fatalf("stderr=%q, want profile-selection diagnostic", stderr.String())
+	}
+	if _, err := os.Stat(markerPath); !os.IsNotExist(err) {
+		t.Fatalf("Go was invoked before profile agreement: %v", err)
+	}
+	if state.snapshot().apiRequests != 0 {
+		t.Fatalf("hosted API requests = %d, want 0", state.snapshot().apiRequests)
 	}
 }
 
@@ -671,18 +842,18 @@ func TestCIDeliverPreparesDependenciesAndBuildsConfiguredTargets(t *testing.T) {
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	})
 	expectedCommit := pushTaggedCLIRepository(t, repository)
-	state.commit = expectedCommit
+	state.update(func(state *deliveryServerData) { state.commit = expectedCommit })
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	var stdout, stderr bytes.Buffer
 	args := []string{"ci-deliver", "--repo", repository, "--commit", expectedCommit, "v1.2.3"}
 	if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
 		t.Fatalf("run() status=%d stdout=%q stderr=%q", status, stdout.String(), stderr.String())
 	}
-	if state.releaseCreates != 1 || state.assetUploads != 2 {
-		t.Fatalf("delivery counts = creates:%d uploads:%d", state.releaseCreates, state.assetUploads)
+	if state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 2 {
+		t.Fatalf("delivery counts = creates:%d uploads:%d", state.snapshot().releaseCreates, state.snapshot().assetUploads)
 	}
-	if _, ok := state.assets["helper-v1.2.3-"+runtime.GOOS+"-"+runtime.GOARCH]; !ok {
-		t.Fatalf("binary not uploaded: %#v", state.assets)
+	if _, ok := state.snapshot().assets["helper-v1.2.3-"+runtime.GOOS+"-"+runtime.GOARCH]; !ok {
+		t.Fatalf("binary not uploaded: %#v", state.snapshot().assets)
 	}
 }
 
@@ -697,7 +868,7 @@ func TestCIDeliverValidatesCredentialsBeforePreparingDependencies(t *testing.T)
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	})
 	expectedCommit := pushTaggedCLIRepository(t, repository)
-	state.commit = expectedCommit
+	state.update(func(state *deliveryServerData) { state.commit = expectedCommit })
 
 	shimDir := t.TempDir()
 	markerPath := filepath.Join(shimDir, "go-invoked")
@@ -719,8 +890,8 @@ func TestCIDeliverValidatesCredentialsBeforePreparingDependencies(t *testing.T)
 	if _, err := os.Stat(markerPath); !os.IsNotExist(err) {
 		t.Fatalf("Go was invoked before credential validation: %v", err)
 	}
-	if state.apiRequests != 0 {
-		t.Fatalf("hosted API requests = %d, want 0", state.apiRequests)
+	if state.snapshot().apiRequests != 0 {
+		t.Fatalf("hosted API requests = %d, want 0", state.snapshot().apiRequests)
 	}
 }
 
@@ -735,7 +906,7 @@ func TestDeliverRejectsInvalidTaggedSourceBeforeManagedBuild(t *testing.T) {
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	}
 	writeDeliveryProfile(t, repository, settings)
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	if err := os.WriteFile(filepath.Join(repository, "uncommitted.txt"), []byte("dirty"), 0600); err != nil {
 		t.Fatal(err)
@@ -743,8 +914,8 @@ func TestDeliverRejectsInvalidTaggedSourceBeforeManagedBuild(t *testing.T) {
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	var stdout, stderr bytes.Buffer
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
-	if status != 1 || state.apiRequests != 0 || strings.Contains(stderr.String(), "building ") {
-		t.Fatalf("invalid-source delivery status=%d requests=%d stdout=%q stderr=%q", status, state.apiRequests, stdout.String(), stderr.String())
+	if status != 1 || state.snapshot().apiRequests != 0 || strings.Contains(stderr.String(), "building ") {
+		t.Fatalf("invalid-source delivery status=%d requests=%d stdout=%q stderr=%q", status, state.snapshot().apiRequests, stdout.String(), stderr.String())
 	}
 }
 
@@ -760,7 +931,7 @@ func TestDeliverFailureReportsRecoveryForPartialConflictAndUnknownStates(t *test
 		{
 			name:             "partial",
 			status:           1,
-			recovery:         []string{"recovery: fix the reported cause", "retry this version"},
+			recovery:         []string{"recovery: fix the reported cause", "retry module example.com/cli-candidate version v1.2.3 tag v1.2.3"},
 			assetObservation: "pending helper-v1.2.3-linux-amd64",
 		},
 		{
@@ -773,7 +944,7 @@ func TestDeliverFailureReportsRecoveryForPartialConflictAndUnknownStates(t *test
 		{
 			name:               "unknown",
 			status:             3,
-			recovery:           []string{"resolve the remote state before retrying"},
+			recovery:           []string{"recovery: resolve the remote state for module example.com/cli-candidate version v1.2.3 tag v1.2.3"},
 			assetObservation:   "uncertain helper-v1.2.3-linux-amd64",
 			missingObservation: "pending SHA256SUMS",
 		},
@@ -789,16 +960,18 @@ func TestDeliverFailureReportsRecoveryForPartialConflictAndUnknownStates(t *test
 				Build:    &build,
 				Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 			})
-			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+			state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 			cliGitRun(t, repository, "tag", "v1.2.3")
 			assetsDir, _ := writeDeliveryReceipt(t, repository, build)
 			switch test.name {
 			case "partial":
-				state.failAssetName = "helper-v1.2.3-linux-amd64"
+				state.update(func(state *deliveryServerData) { state.failAssetName = "helper-v1.2.3-linux-amd64" })
 			case "conflict":
-				state.assets["helper-v1.2.3-linux-amd64"] = []byte("different hosted bytes")
+				state.update(func(state *deliveryServerData) {
+					state.assets["helper-v1.2.3-linux-amd64"] = []byte("different hosted bytes")
+				})
 			case "unknown":
-				state.ambiguousAssetName = "helper-v1.2.3-linux-amd64"
+				state.update(func(state *deliveryServerData) { state.ambiguousAssetName = "helper-v1.2.3-linux-amd64" })
 			}
 			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 			var stdout, stderr bytes.Buffer
@@ -826,17 +999,17 @@ func TestDeliverFailureReportsRecoveryForPartialConflictAndUnknownStates(t *test
 
 func TestDeliverRejectsWrongHostedTagBeforeReleaseWrite(t *testing.T) {
 	repository := newCLIRepository(t)
-	state := &deliveryServerState{remoteCommit: strings.Repeat("0", 40)}
+	state := &deliveryServerState{data: deliveryServerData{remoteCommit: strings.Repeat("0", 40)}}
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	var stdout, stderr bytes.Buffer
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
-	if status != 1 || state.releaseCreates != 0 || state.assetUploads != 0 {
-		t.Fatalf("wrong hosted tag status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.releaseCreates, state.assetUploads, stdout.String(), stderr.String())
+	if status != 1 || state.snapshot().releaseCreates != 0 || state.snapshot().assetUploads != 0 {
+		t.Fatalf("wrong hosted tag status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stdout.String(), stderr.String())
 	}
 }
 
@@ -846,13 +1019,13 @@ func TestDeliverRequiresCredentialBeforeRemoteRequests(t *testing.T) {
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example", TokenEnv: "RELEASEKIT_TEST_DELIVERY_TOKEN"}})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	t.Setenv("RELEASEKIT_TEST_DELIVERY_TOKEN", "")
 	var stdout, stderr bytes.Buffer
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
-	if status != 2 || state.apiRequests != 0 || !strings.Contains(stderr.String(), "RELEASEKIT_TEST_DELIVERY_TOKEN") {
-		t.Fatalf("missing credential status=%d requests=%d stdout=%q stderr=%q", status, state.apiRequests, stdout.String(), stderr.String())
+	if status != 2 || state.snapshot().apiRequests != 0 || !strings.Contains(stderr.String(), "RELEASEKIT_TEST_DELIVERY_TOKEN") {
+		t.Fatalf("missing credential status=%d requests=%d stdout=%q stderr=%q", status, state.snapshot().apiRequests, stdout.String(), stderr.String())
 	}
 }
 
@@ -862,7 +1035,7 @@ func TestDeliverRejectsCheckoutThatDiffersFromLocalTag(t *testing.T) {
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	if err := os.WriteFile(filepath.Join(repository, "later.txt"), []byte("later commit"), 0o600); err != nil {
 		t.Fatal(err)
@@ -872,16 +1045,16 @@ func TestDeliverRejectsCheckoutThatDiffersFromLocalTag(t *testing.T) {
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	var stdout, stderr bytes.Buffer
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
-	if status != 1 || state.apiRequests != 0 || state.releaseCreates != 0 {
-		t.Fatalf("mismatched checkout status=%d requests=%d creates=%d stdout=%q stderr=%q", status, state.apiRequests, state.releaseCreates, stdout.String(), stderr.String())
+	if status != 1 || state.snapshot().apiRequests != 0 || state.snapshot().releaseCreates != 0 {
+		t.Fatalf("mismatched checkout status=%d requests=%d creates=%d stdout=%q stderr=%q", status, state.snapshot().apiRequests, state.snapshot().releaseCreates, stdout.String(), stderr.String())
 	}
-	if got := cliGitOutput(t, repository, "rev-parse", "refs/tags/v1.2.3"); got != state.commit {
-		t.Fatalf("delivery moved tag from %s to %s", state.commit, got)
+	if got := cliGitOutput(t, repository, "rev-parse", "refs/tags/v1.2.3"); got != state.snapshot().commit {
+		t.Fatalf("delivery moved tag from %s to %s", state.snapshot().commit, got)
 	}
 }
 
 func TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites(t *testing.T) {
-	for _, mode := range []string{"valid receipt", "tampered", "stale settings"} {
+	for _, mode := range []string{"valid receipt", "tampered", "missing artifact", "stale settings"} {
 		t.Run(mode, func(t *testing.T) {
 			repository := newCLIRepository(t)
 			state := &deliveryServerState{}
@@ -890,7 +1063,7 @@ func TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites(t *testin
 			current := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
 			settings := cli.Settings{Product: "Example Product", Build: &current, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}}
 			writeDeliveryProfile(t, repository, settings)
-			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+			state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 			cliGitRun(t, repository, "tag", "v1.2.3")
 			receiptSettings := current
 			if mode == "stale settings" {
@@ -902,20 +1075,35 @@ func TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites(t *testin
 					t.Fatal(err)
 				}
 			}
+			if mode == "missing artifact" {
+				if err := os.Remove(artifactPath); err != nil {
+					t.Fatal(err)
+				}
+			}
+			if mode == "tampered" || mode == "missing artifact" {
+				if _, err := cli.LoadBuildReceipt(filepath.Join(assetsDir, cli.BuildReceiptName)); err != nil {
+					t.Fatalf("receipt loading performed artifact verification: %v", err)
+				}
+			}
 			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 			var stdout, stderr bytes.Buffer
 			status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assetsDir, "v1.2.3"}, &stdout, &stderr)
 			if mode == "valid receipt" {
-				if status != 0 || state.releaseCreates != 1 || state.assetUploads != 2 {
-					t.Fatalf("valid receipt status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.releaseCreates, state.assetUploads, stdout.String(), stderr.String())
+				if status != 0 || state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 2 {
+					t.Fatalf("valid receipt status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stdout.String(), stderr.String())
 				}
 				if _, err := os.Stat(artifactPath); err != nil {
 					t.Fatalf("prebuilt artifact was not retained: %v", err)
 				}
 				return
 			}
-			if status != 1 || state.apiRequests != 0 || state.releaseCreates != 0 || state.assetUploads != 0 {
-				t.Fatalf("%s receipt status=%d requests=%d stdout=%q stderr=%q", mode, status, state.apiRequests, stdout.String(), stderr.String())
+			if status != 1 || state.snapshot().apiRequests != 0 || state.snapshot().releaseCreates != 0 || state.snapshot().assetUploads != 0 {
+				t.Fatalf("%s receipt status=%d requests=%d stdout=%q stderr=%q", mode, status, state.snapshot().apiRequests, stdout.String(), stderr.String())
+			}
+			if mode == "tampered" || mode == "missing artifact" {
+				if strings.Contains(stderr.String(), "load verified build receipt") {
+					t.Fatalf("%s artifact was rejected while loading its receipt: %q", mode, stderr.String())
+				}
 			}
 		})
 	}
@@ -937,9 +1125,11 @@ func writeDeliveryReceipt(t *testing.T, repository string, settings cli.BuildSet
 	digest := sha256.Sum256(content)
 	target := cli.ReceiptTarget{OS: "linux", Arch: "amd64"}
 	receipt := cli.BuildReceipt{
-		RepositoryDir: resolvedRepository, CandidateCommit: cliGitOutput(t, repository, "rev-parse", "HEAD"),
-		SourceVerified: true,
-		Version:        "v1.2.3", MainPackage: settings.MainPackage, BinaryName: settings.BinaryName,
+		SchemaVersion: cli.BuildReceiptSchemaVersion,
+		RepositoryDir: resolvedRepository, ModuleDir: resolvedRepository, ModulePath: "example.com/cli-candidate", Tag: "v1.2.3",
+		CandidateCommit: cliGitOutput(t, repository, "rev-parse", "HEAD"),
+		SourceVerified:  true,
+		Version:         "v1.2.3", MainPackage: settings.MainPackage, BinaryName: settings.BinaryName,
 		OutputDir: assetsDir, Targets: []cli.ReceiptTarget{target}, Compiler: "go version fixture",
 		Artifacts: []cli.ReceiptArtifact{{Path: artifactPath, Filename: filename, Target: target, SHA256: hex.EncodeToString(digest[:])}},
 	}
@@ -950,6 +1140,31 @@ func writeDeliveryReceipt(t *testing.T, repository string, settings cli.BuildSet
 }
 
 type deliveryServerState struct {
+	mu   sync.Mutex
+	data deliveryServerData
+}
+
+func (state *deliveryServerState) update(change func(*deliveryServerData)) {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	change(&state.data)
+}
+
+func (state *deliveryServerState) snapshot() deliveryServerData {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	result := state.data
+
+	result.assets = make(map[string][]byte, len(state.data.assets))
+	for key, value := range state.data.assets {
+		result.assets[key] = append([]byte(nil), value...)
+	}
+
+	return result
+}
+
+type deliveryServerData struct {
+	tag                string
 	malformedCreate    bool
 	failAssetListing   bool
 	failAssetDownloads bool
@@ -969,33 +1184,38 @@ type deliveryServerState struct {
 
 func newDeliveryServer(t *testing.T, state *deliveryServerState) *httptest.Server {
 	t.Helper()
-	if state.assets == nil {
-		state.assets = make(map[string][]byte)
+	data := &state.data
+	if data.tag == "" {
+		data.tag = "v1.2.3"
+	}
+	if data.assets == nil {
+		data.assets = make(map[string][]byte)
 	}
-	serverURL := ""
 	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		state.mu.Lock()
+		defer state.mu.Unlock()
 		if strings.HasPrefix(r.URL.Path, "/api/") {
-			state.apiRequests++
+			data.apiRequests++
 			if r.Header.Get("Authorization") != "token fixture-token" {
 				t.Errorf("authorization = %q", r.Header.Get("Authorization"))
 			}
 		}
 		switch r.URL.Path {
-		case "/api/v1/repos/owner/example/tags/v1.2.3":
-			if state.commit == "" {
+		case "/api/v1/repos/owner/example/tags/" + data.tag:
+			if data.commit == "" {
 				t.Error("tag source commit was not initialized")
 			}
-			commit := state.remoteCommit
+			commit := data.remoteCommit
 			if commit == "" {
-				commit = state.commit
+				commit = data.commit
 			}
-			_, _ = fmt.Fprintf(w, `{"name":"v1.2.3","commit":{"sha":%q}}`, commit)
-		case "/api/v1/repos/owner/example/releases/tags/v1.2.3":
-			if !state.pageExists {
+			_, _ = fmt.Fprintf(w, `{"name":%q,"commit":{"sha":%q}}`, data.tag, commit)
+		case "/api/v1/repos/owner/example/releases/tags/" + data.tag:
+			if !data.pageExists {
 				http.NotFound(w, r)
 				return
 			}
-			writeDeliveryRelease(w, serverURL, state)
+			writeDeliveryRelease(w, serverURL(r), data)
 		case "/api/v1/repos/owner/example/releases":
 			if r.Method != http.MethodPost {
 				t.Errorf("release request method = %s", r.Method)
@@ -1011,26 +1231,26 @@ func newDeliveryServer(t *testing.T, state *deliveryServerState) *httptest.Serve
 			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
 				t.Errorf("decode create payload: %v", err)
 			}
-			if payload.Tag != "v1.2.3" || payload.Target != state.commit {
+			if payload.Tag != data.tag || payload.Target != data.commit {
 				t.Errorf("release source payload = %#v", payload)
 			}
-			state.pageExists, state.releaseCreates, state.noteBody = true, state.releaseCreates+1, payload.Body
-			if state.malformedCreate {
+			data.pageExists, data.releaseCreates, data.noteBody = true, data.releaseCreates+1, payload.Body
+			if data.malformedCreate {
 				w.WriteHeader(http.StatusCreated)
-				_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "tag_name": "v1.2.3", "name": "inconsistent response", "body": payload.Body})
+				_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "tag_name": data.tag, "name": "inconsistent response", "body": payload.Body})
 				return
 			}
-			writeDeliveryRelease(w, serverURL, state)
+			writeDeliveryRelease(w, serverURL(r), data)
 		case "/api/v1/repos/owner/example/releases/10/assets":
 			if r.Method == http.MethodGet {
-				state.assetListReads++
-				if state.failAssetListing {
+				data.assetListReads++
+				if data.failAssetListing {
 					http.Error(w, "unavailable", 503)
 					return
 				}
-				list := make([]map[string]any, 0, len(state.assets))
-				for name, content := range state.assets {
-					list = append(list, map[string]any{"id": len(list) + 1, "name": name, "size": len(content), "browser_download_url": serverURL + "/files/" + name})
+				list := make([]map[string]any, 0, len(data.assets))
+				for name, content := range data.assets {
+					list = append(list, map[string]any{"id": len(list) + 1, "name": name, "size": len(content), "browser_download_url": serverURL(r) + "/files/" + name})
 				}
 				_ = json.NewEncoder(w).Encode(list)
 				return
@@ -1052,28 +1272,28 @@ func newDeliveryServer(t *testing.T, state *deliveryServerState) *httptest.Serve
 			if err != nil {
 				t.Errorf("read asset bytes: %v", err)
 			}
-			if _, exists := state.assets[name]; exists {
+			if _, exists := data.assets[name]; exists {
 				t.Errorf("asset %q uploaded more than once", name)
 			}
-			if name == state.failAssetName {
+			if name == data.failAssetName {
 				http.Error(w, "upload failed", http.StatusBadRequest)
 				return
 			}
-			if name == state.ambiguousAssetName {
+			if name == data.ambiguousAssetName {
 				http.Error(w, "upload outcome ambiguous", http.StatusInternalServerError)
 				return
 			}
-			state.assets[name] = content
-			state.assetUploads++
-			_ = json.NewEncoder(w).Encode(map[string]any{"id": state.assetUploads, "name": name, "size": len(content)})
+			data.assets[name] = content
+			data.assetUploads++
+			_ = json.NewEncoder(w).Encode(map[string]any{"id": data.assetUploads, "name": name, "size": len(content)})
 		default:
 			if strings.HasPrefix(r.URL.Path, "/files/") {
-				if state.failAssetDownloads {
+				if data.failAssetDownloads {
 					http.Error(w, "unavailable", 503)
 					return
 				}
 				name := strings.TrimPrefix(r.URL.Path, "/files/")
-				content, ok := state.assets[name]
+				content, ok := data.assets[name]
 				if !ok {
 					http.NotFound(w, r)
 					return
@@ -1086,17 +1306,17 @@ func newDeliveryServer(t *testing.T, state *deliveryServerState) *httptest.Serve
 		}
 	})
 	server := httptest.NewServer(handler)
-	serverURL = server.URL
 	return server
 }
 
-func writeDeliveryRelease(w http.ResponseWriter, serverURL string, state *deliveryServerState) {
+// writeDeliveryRelease reads data while the request handler holds state.mu.
+func writeDeliveryRelease(w http.ResponseWriter, baseURL string, data *deliveryServerData) {
 	w.Header().Set("Content-Type", "application/json")
-	product := state.product
+	product := data.product
 	if product == "" {
 		product = "Example Product"
 	}
-	_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "html_url": serverURL + "/releases/10", "tag_name": "v1.2.3", "target_commitish": state.commit, "name": product + " v1.2.3", "body": state.noteBody, "draft": false, "prerelease": false})
+	_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "html_url": baseURL + "/releases/10", "tag_name": data.tag, "target_commitish": data.commit, "name": product + " v1.2.3", "body": data.noteBody, "draft": false, "prerelease": false})
 }
 
 func writeDeliveryProfile(t *testing.T, repository string, settings cli.Settings) {
@@ -1227,7 +1447,7 @@ func TestDeliverRejectsReceiptBuiltFromDirtySourceAfterCleanup(t *testing.T) {
 	defer server.Close()
 	settings := cli.Settings{Product: "Example Product", Build: &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}}
 	writeDeliveryProfile(t, repository, settings)
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	mainPath := filepath.Join(repository, "main.go")
 	original, err := os.ReadFile(mainPath)
@@ -1254,26 +1474,26 @@ func TestDeliverRejectsReceiptBuiltFromDirtySourceAfterCleanup(t *testing.T) {
 	stdout.Reset()
 	stderr.Reset()
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assets, "v1.2.3"}, &stdout, &stderr)
-	if status != 1 || state.apiRequests != 0 || !strings.Contains(stderr.String(), "build source") {
-		t.Fatalf("status=%d requests=%d %s", status, state.apiRequests, stderr.String())
+	if status != 1 || state.snapshot().apiRequests != 0 || !strings.Contains(stderr.String(), "build source") {
+		t.Fatalf("status=%d requests=%d %s", status, state.snapshot().apiRequests, stderr.String())
 	}
 }
 
 func TestRecoveredPageCreatePreservesPartialDeliveryOnInspectionFailure(t *testing.T) {
 	repository := newCLIRepository(t)
-	state := &deliveryServerState{malformedCreate: true, failAssetListing: true}
+	state := &deliveryServerState{data: deliveryServerData{malformedCreate: true, failAssetListing: true}}
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	build := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
 	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &build, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	assets, _ := writeDeliveryReceipt(t, repository, build)
 	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
 	var stdout, stderr bytes.Buffer
 	status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assets, "v1.2.3"}, &stdout, &stderr)
-	if status != 1 || !strings.Contains(stderr.String(), "state=partial") || state.releaseCreates != 1 || state.assetListReads != 1 || state.assetUploads != 0 {
-		t.Fatalf("status=%d state=%#v %s", status, state, stderr.String())
+	if status != 1 || !strings.Contains(stderr.String(), "state=partial") || state.snapshot().releaseCreates != 1 || state.snapshot().assetListReads != 1 || state.snapshot().assetUploads != 0 {
+		t.Fatalf("status=%d state=%#v %s", status, state.snapshot(), stderr.String())
 	}
 }
 
@@ -1281,12 +1501,12 @@ func TestUnreadableAssetsDoNotClaimAnUnknownWrite(t *testing.T) {
 	for _, existingPage := range []bool{false, true} {
 		t.Run(fmt.Sprintf("existing-page-%t", existingPage), func(t *testing.T) {
 			repository := newCLIRepository(t)
-			state := &deliveryServerState{pageExists: existingPage, noteBody: "# Example Product v1.2.3\n\nRelease note.\n", failAssetDownloads: true, assets: map[string][]byte{"helper-v1.2.3-linux-amd64": []byte("fixture artifact")}}
+			state := &deliveryServerState{data: deliveryServerData{pageExists: existingPage, noteBody: "# Example Product v1.2.3\n\nRelease note.\n", failAssetDownloads: true, assets: map[string][]byte{"helper-v1.2.3-linux-amd64": []byte("fixture artifact")}}}
 			server := newDeliveryServer(t, state)
 			defer server.Close()
 			build := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
 			writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &build, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
-			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+			state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 			cliGitRun(t, repository, "tag", "v1.2.3")
 			assets, _ := writeDeliveryReceipt(t, repository, build)
 			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
@@ -1298,8 +1518,8 @@ func TestUnreadableAssetsDoNotClaimAnUnknownWrite(t *testing.T) {
 				expectedState = "not_attempted"
 				expectedCreates = 0
 			}
-			if status != 1 || !strings.Contains(stderr.String(), "state="+expectedState) || state.assetUploads != 0 || state.releaseCreates != expectedCreates {
-				t.Fatalf("status=%d creates=%d uploads=%d %s", status, state.releaseCreates, state.assetUploads, stderr.String())
+			if status != 1 || !strings.Contains(stderr.String(), "state="+expectedState) || state.snapshot().assetUploads != 0 || state.snapshot().releaseCreates != expectedCreates {
+				t.Fatalf("status=%d creates=%d uploads=%d %s", status, state.snapshot().releaseCreates, state.snapshot().assetUploads, stderr.String())
 			}
 			if existingPage && !strings.Contains(stderr.String(), "recovery: fix the local or preflight failure") {
 				t.Fatalf("not-attempted recovery guidance missing: %s", stderr.String())
@@ -1342,7 +1562,7 @@ func TestTemporaryDeliveryBuildDoesNotRequireWritableRepositoryParent(t *testing
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "v1.2.3")
 	parent := t.TempDir()
 	moved := filepath.Join(parent, "repo")

cmd/releasekit/multi_module_example_test.go

@@ -0,0 +1,247 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io/fs"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestMultiModuleSelectorMapsSelectorsAndTags(t *testing.T) {
+	example := filepath.Join(cliRepositoryRoot(t), "examples", "multi-module")
+	helper := filepath.Join(example, "select-module.sh")
+	for _, test := range []struct {
+		mode  string
+		value string
+		want  string
+	}{
+		{mode: "selector", value: "root", want: "root\tv[01].*\t.\treleasekit-root.json"},
+		{mode: "selector", value: "ckconfig", want: "ckconfig\tintegrations/ckconfig/v*\tintegrations/ckconfig\treleasekit-ckconfig.json"},
+		{mode: "tag", value: "integrations/ckconfig/v1.2.3", want: "ckconfig\tintegrations/ckconfig/v*\tintegrations/ckconfig\treleasekit-ckconfig.json"},
+		{mode: "tag", value: "integrations/core/v2.3.4", want: "core-v2\tintegrations/core/v2.*\tintegrations/core/v2\treleasekit-core-v2.json"},
+		{mode: "tag", value: "v1.2.3", want: "root\tv[01].*\t.\treleasekit-root.json"},
+	} {
+		t.Run(test.mode+" "+test.value, func(t *testing.T) {
+			got := runModuleSelector(t, helper, test.mode, test.value, "")
+			if strings.TrimSpace(got) != test.want {
+				t.Fatalf("selector output = %q, want %q", got, test.want)
+			}
+		})
+	}
+
+	mapPath := filepath.Join(t.TempDir(), "release modules.tsv")
+	if err := os.WriteFile(mapPath, []byte("one\tfeature/*\tmodules/one\tprofiles/one.json\ntwo\tfeature/v1.*\tmodules/two\tprofiles/two.json\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if output := runModuleSelectorError(t, helper, "selector", "absent", mapPath); !strings.Contains(output, "no module map row") {
+		t.Fatalf("unknown selector error = %q", output)
+	}
+	if output := runModuleSelectorError(t, helper, "tag", "feature/v1.2.3", mapPath); !strings.Contains(output, "ambiguous") {
+		t.Fatalf("ambiguous event error = %q", output)
+	}
+
+	if err := os.WriteFile(mapPath, []byte("space\tfeature/*\tintegrations/ck config\tprofiles/core release.json\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	got := runModuleSelector(t, helper, "tag", "feature/v1.2.3", mapPath)
+	want := "space\tfeature/*\tintegrations/ck config\tprofiles/core release.json"
+	if strings.TrimSpace(got) != want {
+		t.Fatalf("paths with spaces = %q, want %q", got, want)
+	}
+}
+
+func TestMultiModuleLauncherUsesSelectedModuleAndProfile(t *testing.T) {
+	example := filepath.Join(cliRepositoryRoot(t), "examples", "multi-module")
+	repository := newCLIRepository(t)
+	copyExampleTree(t, example, repository)
+
+	rootModule := "module example.com/multi-module-consumer\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.2.197\n"
+	selectedModule := "module example.com/multi-module-consumer/integrations/ckconfig\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.2.198\n"
+	writeRepositoryFile(t, repository, "go.mod", rootModule)
+	writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", selectedModule)
+	spaceModule := "module example.com/multi-module-consumer/integrations/ckconfig\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.2.299\n"
+	writeRepositoryFile(t, repository, "integrations/ck config/go.mod", spaceModule)
+	writeRepositoryFile(t, repository, "profiles/core release.json", `{"product":"Example Consumer Integration","module_dir":"integrations/ck config"}`)
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "prepare multi-module launcher fixture")
+
+	mapPath := filepath.Join(t.TempDir(), "release modules.tsv")
+	if err := os.WriteFile(mapPath, []byte("with space\tfeature/*\tintegrations/ck config\tprofiles/core release.json\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	shimDir := t.TempDir()
+	goLog := filepath.Join(t.TempDir(), "go commands")
+	argsLog := filepath.Join(t.TempDir(), "tool arguments")
+	shim := `#!/bin/sh
+set -eu
+printf 'cwd=%s args=%s\n' "$PWD" "$*" >> "$RELEASEKIT_TEST_GO_LOG"
+modfile=
+output=
+previous=
+for argument in "$@"; do
+  case "$argument" in -modfile=*) modfile=${argument#-modfile=} ;; esac
+  if [ "$previous" = -o ]; then output=$argument; fi
+  previous=$argument
+done
+if [ -n "$modfile" ]; then cat "$modfile" >> "$RELEASEKIT_TEST_GO_LOG"; fi
+if [ "$1" = build ]; then
+  cat > "$output" <<'TOOL'
+#!/bin/sh
+printf '<%s>\n' "$@" > "$RELEASEKIT_TEST_TOOL_ARGS"
+TOOL
+  chmod +x "$output"
+fi
+`
+	if err := os.WriteFile(filepath.Join(shimDir, "go"), []byte(shim), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("PATH", shimDir+string(os.PathListSeparator)+os.Getenv("PATH"))
+	t.Setenv("RELEASEKIT_MODULE_MAP", mapPath)
+	t.Setenv("RELEASEKIT_TEST_GO_LOG", goLog)
+	t.Setenv("RELEASEKIT_TEST_TOOL_ARGS", argsLog)
+	launcher := filepath.Join(repository, "release.sh")
+	command := exec.Command(launcher, "with space", "v1.2.4")
+	var stdout, stderr bytes.Buffer
+	command.Stdout = &stdout
+	command.Stderr = &stderr
+	if err := command.Run(); err != nil {
+		t.Fatalf("launcher error: %v stdout=%q stderr=%q", err, stdout.String(), stderr.String())
+	}
+
+	goCommands, err := os.ReadFile(goLog)
+	if err != nil {
+		t.Fatal(err)
+	}
+	wantModule := filepath.Join(repository, "integrations", "ck config")
+	if !strings.Contains(string(goCommands), "cwd="+wantModule) || !strings.Contains(string(goCommands), "v0.2.299") || strings.Contains(string(goCommands), "v0.2.197") {
+		t.Fatalf("tool bootstrap did not use selected module metadata: %s", goCommands)
+	}
+	toolArgs, err := os.ReadFile(argsLog)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, expected := range []string{"<publish>", "<--repo>", "<" + repository + ">", "<--config>", "<profiles/core release.json>", "<--expected-module>", "<integrations/ck config>", "<v1.2.4>"} {
+		if !strings.Contains(string(toolArgs), expected) {
+			t.Errorf("publication arguments %q omit %q", toolArgs, expected)
+		}
+	}
+	if strings.Contains(string(goCommands), repository+"/.releasekit-bootstrap.") {
+		t.Fatalf("temporary tool metadata was placed inside the repository: %s", goCommands)
+	}
+}
+
+func TestMultiModuleLauncherBuildsToolFromSelectedDependency(t *testing.T) {
+	example := filepath.Join(cliRepositoryRoot(t), "examples", "multi-module")
+	repository := newCLIRepository(t)
+	copyExampleTree(t, example, repository)
+	writeRepositoryFile(t, repository, "go.mod", "module example.com/multi-module-consumer\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.2.197\n")
+	writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", "module example.com/multi-module-consumer/integrations/ckconfig\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.2.198\n")
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "prepare selected tool module")
+
+	proxy := writeReleaseKitModuleProxy(t)
+	moduleCache := t.TempDir()
+	t.Setenv("GOMODCACHE", moduleCache)
+	t.Cleanup(func() {
+		_ = filepath.WalkDir(moduleCache, func(path string, entry fs.DirEntry, err error) error {
+			if err == nil && entry.IsDir() {
+				_ = os.Chmod(path, 0o700)
+			}
+			return nil
+		})
+	})
+	t.Setenv("GOPROXY", "file://"+filepath.ToSlash(proxy))
+	t.Setenv("GOSUMDB", "off")
+	t.Setenv("GOTOOLCHAIN", "local")
+	moduleBefore, err := os.ReadFile(filepath.Join(repository, "integrations", "ckconfig", "go.mod"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	command := exec.Command(filepath.Join(repository, "release.sh"), "ckconfig", "v1.2.3")
+	output, err := command.CombinedOutput()
+	if err != nil {
+		t.Fatalf("launcher error: %v output=%q", err, output)
+	}
+	for _, expected := range []string{
+		"tool-version=v0.2.198 helper=tool-only dependency",
+		`"publish"`, `"--repo"`, `"` + repository + `"`,
+		`"--config"`, `"releasekit-ckconfig.json"`,
+		`"--expected-module"`, `"integrations/ckconfig"`, `"v1.2.3"`,
+	} {
+		if !strings.Contains(string(output), expected) {
+			t.Errorf("launcher output %q omits %q", output, expected)
+		}
+	}
+	if strings.Contains(string(output), "tool-version=v0.2.197") {
+		t.Fatalf("launcher built the root-selected ReleaseKit version: %s", output)
+	}
+	moduleAfter, err := os.ReadFile(filepath.Join(repository, "integrations", "ckconfig", "go.mod"))
+	if err != nil || !bytes.Equal(moduleAfter, moduleBefore) {
+		t.Fatalf("selected module go.mod changed: got %q want %q error=%v", moduleAfter, moduleBefore, err)
+	}
+}
+
+func runModuleSelector(t *testing.T, helper, mode, value, mapPath string) string {
+	t.Helper()
+	command := exec.Command("sh", helper, mode, value)
+	command.Env = os.Environ()
+	if mapPath != "" {
+		command.Env = append(command.Env, "RELEASEKIT_MODULE_MAP="+mapPath)
+	}
+	output, err := command.CombinedOutput()
+	if err != nil {
+		t.Fatalf("selector %s %q: %v: %s", mode, value, err, output)
+	}
+	return string(output)
+}
+
+func runModuleSelectorError(t *testing.T, helper, mode, value, mapPath string) string {
+	t.Helper()
+	command := exec.Command("sh", helper, mode, value)
+	command.Env = append(os.Environ(), "RELEASEKIT_MODULE_MAP="+mapPath)
+	output, err := command.CombinedOutput()
+	if err == nil {
+		t.Fatalf("selector %s %q unexpectedly succeeded: %s", mode, value, output)
+	}
+	return string(output)
+}
+
+func copyExampleTree(t *testing.T, source, destination string) {
+	t.Helper()
+	err := filepath.WalkDir(source, func(path string, entry fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		relative, err := filepath.Rel(source, path)
+		if err != nil {
+			return err
+		}
+		if relative == "." {
+			return nil
+		}
+		target := filepath.Join(destination, relative)
+		if entry.IsDir() {
+			return os.MkdirAll(target, 0o700)
+		}
+		contents, err := os.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		info, err := entry.Info()
+		if err != nil {
+			return err
+		}
+		mode := info.Mode().Perm()
+		if err := os.WriteFile(target, contents, mode); err != nil {
+			return err
+		}
+		return os.Chmod(target, mode)
+	})
+	if err != nil {
+		t.Fatal(fmt.Errorf("copy multi-module example: %w", err))
+	}
+}

cmd/releasekit/multi_module_woodpecker_test.go

@@ -0,0 +1,438 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/fs"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"sync"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
+)
+
+func TestMultiModuleWoodpeckerDelivery(t *testing.T) {
+	root := cliRepositoryRoot(t)
+	example := filepath.Join(root, "examples", "multi-module")
+	contents, err := os.ReadFile(filepath.Join(example, "woodpecker.yml"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	block, err := extractWoodpeckerCommand(string(contents), "deliver")
+	if err != nil {
+		t.Fatal(err)
+	}
+	command := strings.ReplaceAll(block, "$${", "${")
+	for _, eventTag := range []string{"refs/tags/v[01].*", "refs/tags/integrations/ckconfig/v*", "refs/tags/integrations/core/v2.*"} {
+		if !strings.Contains(string(contents), eventTag) {
+			t.Errorf("workflow tag filters omit %q", eventTag)
+		}
+	}
+	toolBinary := buildWorkflowCLI(t, root)
+	proxy := writeWorkflowToolProxy(t)
+
+	t.Run("nested page delivery retries from tagged mapping", func(t *testing.T) {
+		const tag = "integrations/ckconfig/v1.2.3"
+		delivery := newMappedDeliveryFixture(t, tag)
+		repository := newWorkflowRepository(t, example)
+		writeMappedProfile(t, repository, "releasekit-ckconfig.json", cli.Settings{
+			Product: "Example Consumer Integration", ModuleDir: "integrations/ckconfig",
+			Delivery: workflowDeliverySettings(delivery.snapshot().URL),
+		})
+		writeRepositoryFile(t, repository, "integrations/ckconfig/docs/releases/v1.2.3.md", "# Example Consumer Integration v1.2.3\n\nTagged integration note.\n")
+		writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", workflowModuleFile("example.com/multi-module-consumer/integrations/ckconfig", "v0.2.197"))
+		commit := tagAndPushWorkflowRepository(t, repository, tag)
+		delivery.update(func(delivery *mappedDeliveryData) { delivery.commit = commit })
+		env := multiModuleWorkflowEnvironment(t, repository, commit, tag, toolBinary, proxy)
+		if output := runWoodpeckerBlock(t, command, repository, env); !strings.Contains(output, "state complete") || !strings.Contains(output, "tool-version=v0.2.197") {
+			t.Fatalf("tagged page delivery output = %q", output)
+		}
+		if delivery.snapshot().creates != 1 || delivery.snapshot().requests == 0 || delivery.snapshot().tag != tag {
+			t.Fatalf("page delivery fixture = %#v", delivery.snapshot())
+		}
+
+		cliGitRun(t, repository, "checkout", "main")
+		writeRepositoryFile(t, repository, "release-modules.tsv", "# changed after release\nroot\tv[01].*\t.\treleasekit-root.json\n")
+		writeRepositoryFile(t, repository, "integrations/ckconfig/go.mod", workflowModuleFile("example.com/multi-module-consumer/integrations/ckconfig", "v0.2.198"))
+		cliGitRun(t, repository, "add", ".")
+		cliGitRun(t, repository, "commit", "-m", "change default branch release selection")
+		cliGitRun(t, repository, "push", "origin", "main")
+
+		output := runWoodpeckerBlock(t, command, repository, env)
+		if !strings.Contains(output, "tool-version=v0.2.197") || strings.Contains(output, "tool-version=v0.2.198") {
+			t.Fatalf("tag retry did not use its committed tool version: %q", output)
+		}
+		if delivery.snapshot().creates != 1 || delivery.snapshot().tag != tag {
+			t.Fatalf("tag retry did not reuse the tagged mapping: %#v", delivery.snapshot())
+		}
+	})
+
+	t.Run("binary delivery from physical major module", func(t *testing.T) {
+		const tag = "integrations/core/v2.1.0"
+		delivery := newMappedDeliveryFixture(t, tag)
+		repository := newWorkflowRepository(t, example)
+		writeMappedProfile(t, repository, "releasekit-core-v2.json", cli.Settings{
+			Product: "Example Consumer Core v2", ModuleDir: "integrations/core/v2",
+			Build:    &cli.BuildSettings{MainPackage: ".", BinaryName: "core", Targets: []string{"linux/amd64"}},
+			Delivery: workflowDeliverySettings(delivery.snapshot().URL),
+		})
+		writeRepositoryFile(t, repository, "integrations/core/v2/docs/releases/v2.1.0.md", "# Example Consumer Core v2 v2.1.0\n\nTagged core note.\n")
+		prepareWorkflowModuleSum(t, repository, "integrations/core/v2", proxy)
+		commit := tagAndPushWorkflowRepository(t, repository, tag)
+		delivery.update(func(delivery *mappedDeliveryData) { delivery.commit = commit })
+		env := multiModuleWorkflowEnvironment(t, repository, commit, tag, toolBinary, proxy)
+		output := runWoodpeckerBlock(t, command, repository, env)
+		if !strings.Contains(output, "tool-version=v0.2.197") || !strings.Contains(output, "state complete") {
+			t.Fatalf("binary delivery output = %q", output)
+		}
+		observed := delivery.snapshot()
+		if observed.creates != 1 || observed.uploads != 2 || observed.tag != tag {
+			t.Fatalf("binary delivery fixture = %#v", observed)
+		}
+		if _, ok := observed.assets["core-v2.1.0-linux-amd64"]; !ok {
+			t.Fatalf("binary asset missing: %#v", observed.assets)
+		}
+		if _, ok := observed.assets["SHA256SUMS"]; !ok {
+			t.Fatalf("checksum asset missing: %#v", observed.assets)
+		}
+	})
+
+	t.Run("binary delivery from virtual major module", func(t *testing.T) {
+		const tag = "integrations/core/v2.1.0"
+		delivery := newMappedDeliveryFixture(t, tag)
+		repository := newWorkflowRepository(t, example)
+		writeRepositoryFile(t, repository, "release-modules.tsv", strings.ReplaceAll(readWorkflowFile(t, repository, "release-modules.tsv"), "integrations/core/v2\treleasekit-core-v2.json", "integrations/core\treleasekit-core-v2.json"))
+		writeMappedProfile(t, repository, "releasekit-core-v2.json", cli.Settings{
+			Product: "Example Consumer Core v2", ModuleDir: "integrations/core",
+			Delivery: workflowDeliverySettings(delivery.snapshot().URL),
+		})
+		writeRepositoryFile(t, repository, "integrations/core/go.mod", workflowModuleFile("example.com/multi-module-consumer/integrations/core/v2", "v0.2.197"))
+		writeRepositoryFile(t, repository, "integrations/core/main.go", readWorkflowFile(t, example, "integrations/core/v2/main.go"))
+		writeRepositoryFile(t, repository, "integrations/core/docs/releases/v2.1.0.md", "# Example Consumer Core v2 v2.1.0\n\nTagged core note.\n")
+		prepareWorkflowModuleSum(t, repository, "integrations/core", proxy)
+		commit := tagAndPushWorkflowRepository(t, repository, tag)
+		delivery.update(func(delivery *mappedDeliveryData) { delivery.commit = commit })
+		env := multiModuleWorkflowEnvironment(t, repository, commit, tag, toolBinary, proxy)
+		output := runWoodpeckerBlock(t, command, repository, env)
+		if !strings.Contains(output, "tool-version=v0.2.197") || !strings.Contains(output, "state complete") {
+			t.Fatalf("virtual-major delivery output = %q", output)
+		}
+		if delivery.snapshot().creates != 1 || delivery.snapshot().tag != tag {
+			t.Fatalf("virtual-major delivery fixture = %#v", delivery.snapshot())
+		}
+	})
+
+	t.Run("inconsistent mapping fails exact event tag check", func(t *testing.T) {
+		const tag = "integrations/ckconfig/v2.1.0"
+		delivery := newMappedDeliveryFixture(t, tag)
+		repository := newWorkflowRepository(t, example)
+		mapping := readWorkflowFile(t, repository, "release-modules.tsv")
+		mapping = strings.Replace(mapping,
+			"ckconfig\tintegrations/ckconfig/v*\tintegrations/ckconfig\treleasekit-ckconfig.json",
+			"ckconfig\tintegrations/ckconfig/v*\tintegrations/core/v2\treleasekit-core-v2.json", 1)
+		writeRepositoryFile(t, repository, "release-modules.tsv", mapping)
+		writeMappedProfile(t, repository, "releasekit-core-v2.json", cli.Settings{
+			Product: "Example Consumer Core v2", ModuleDir: "integrations/core/v2",
+			Delivery: workflowDeliverySettings(delivery.snapshot().URL),
+		})
+		writeRepositoryFile(t, repository, "integrations/core/v2/docs/releases/v2.1.0.md", "# Example Consumer Core v2 v2.1.0\n\nMismatched mapped note.\n")
+		commit := tagAndPushWorkflowRepository(t, repository, tag)
+		delivery.update(func(delivery *mappedDeliveryData) { delivery.commit = commit })
+		env := multiModuleWorkflowEnvironment(t, repository, commit, tag, toolBinary, proxy)
+		if output, err := executeWoodpeckerBlock(command, repository, env); err == nil {
+			t.Fatalf("inconsistent mapping succeeded: %s", output)
+		} else if !strings.Contains(output, tag) || !strings.Contains(output, "integrations/core/v2.1.0") {
+			t.Fatalf("inconsistent mapping did not fail the exact tag comparison: %s", output)
+		}
+		if delivery.snapshot().requests != 0 {
+			t.Fatalf("exact event tag mismatch reached hosted delivery: %#v", delivery.snapshot())
+		}
+	})
+}
+
+type mappedDeliveryFixture struct {
+	mu   sync.Mutex
+	data mappedDeliveryData
+}
+
+func (state *mappedDeliveryFixture) update(change func(*mappedDeliveryData)) {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	change(&state.data)
+}
+
+func (state *mappedDeliveryFixture) snapshot() mappedDeliveryData {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	result := state.data
+
+	result.assets = make(map[string][]byte, len(state.data.assets))
+	for key, value := range state.data.assets {
+		result.assets[key] = append([]byte(nil), value...)
+	}
+
+	return result
+}
+
+type mappedDeliveryData struct {
+	URL      string
+	tag      string
+	commit   string
+	page     bool
+	name     string
+	body     string
+	creates  int
+	uploads  int
+	requests int
+	assets   map[string][]byte
+}
+
+func newMappedDeliveryFixture(t *testing.T, tag string) *mappedDeliveryFixture {
+	t.Helper()
+	state := &mappedDeliveryFixture{data: mappedDeliveryData{tag: tag, assets: make(map[string][]byte)}}
+	data := &state.data
+	server := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		state.mu.Lock()
+		defer state.mu.Unlock()
+		data.requests++
+		if r.Header.Get("Authorization") != "token fixture-token" {
+			t.Errorf("delivery authorization = %q", r.Header.Get("Authorization"))
+		}
+		apiRoot := "/api/v1/repos/owner/example/"
+		escapedTag := url.PathEscape(tag)
+		switch r.URL.EscapedPath() {
+		case apiRoot + "tags/" + escapedTag:
+			_ = json.NewEncoder(w).Encode(map[string]any{"name": tag, "commit": map[string]string{"sha": data.commit}})
+		case apiRoot + "releases/tags/" + escapedTag:
+			if !data.page {
+				http.NotFound(w, r)
+				return
+			}
+			_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "html_url": serverURL(r) + "/releases/10", "tag_name": tag, "target_commitish": data.commit, "name": data.name, "body": data.body, "draft": false, "prerelease": false})
+		case apiRoot + "releases":
+			var payload struct {
+				Tag    string `json:"tag_name"`
+				Commit string `json:"target_commitish"`
+				Name   string `json:"name"`
+				Body   string `json:"body"`
+			}
+			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+				t.Errorf("decode release create: %v", err)
+			}
+			if payload.Tag != tag || payload.Commit != data.commit {
+				t.Errorf("release payload = %#v", payload)
+			}
+			data.page = true
+			data.name = payload.Name
+			data.body = payload.Body
+			data.creates++
+			_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "html_url": serverURL(r) + "/releases/10", "tag_name": tag, "target_commitish": data.commit, "name": payload.Name, "body": payload.Body, "draft": false, "prerelease": false})
+		case apiRoot + "releases/10/assets":
+			if r.Method == http.MethodGet {
+				listing := make([]map[string]any, 0, len(data.assets))
+				for name, content := range data.assets {
+					listing = append(listing, map[string]any{"id": len(listing) + 1, "name": name, "size": len(content), "browser_download_url": serverURL(r) + "/files/" + name})
+				}
+				_ = json.NewEncoder(w).Encode(listing)
+				return
+			}
+			if err := r.ParseMultipartForm(1 << 20); err != nil {
+				t.Errorf("parse asset upload: %v", err)
+				http.Error(w, "multipart", http.StatusBadRequest)
+				return
+			}
+			name := r.URL.Query().Get("name")
+			file, _, err := r.FormFile("attachment")
+			if err != nil {
+				t.Errorf("read asset %q: %v", name, err)
+				http.Error(w, "attachment", http.StatusBadRequest)
+				return
+			}
+			content, err := io.ReadAll(file)
+			_ = file.Close()
+			if err != nil {
+				t.Errorf("read asset bytes: %v", err)
+			}
+			data.assets[name] = content
+			data.uploads++
+			_ = json.NewEncoder(w).Encode(map[string]any{"id": data.uploads, "name": name, "size": len(content)})
+		default:
+			if strings.HasPrefix(r.URL.Path, "/files/") {
+				name := strings.TrimPrefix(r.URL.Path, "/files/")
+				if content, ok := data.assets[name]; ok {
+					_, _ = w.Write(content)
+					return
+				}
+				http.NotFound(w, r)
+				return
+			}
+			t.Errorf("unexpected delivery request %s %s", r.Method, r.URL.EscapedPath())
+			http.NotFound(w, r)
+		}
+	}))
+	data.URL = "http://" + server.Listener.Addr().String()
+	server.Start()
+	t.Cleanup(server.Close)
+	return state
+}
+
+func serverURL(r *http.Request) string {
+	return "http://" + r.Host
+}
+
+func buildWorkflowCLI(t *testing.T, root string) string {
+	t.Helper()
+	path := filepath.Join(t.TempDir(), "releasekit")
+	command := exec.Command("go", "build", "-o", path, "./cmd/releasekit")
+	command.Dir = root
+	command.Env = append(os.Environ(), "GOTOOLCHAIN=local", "GOPROXY=off", "GOSUMDB=off")
+	if output, err := command.CombinedOutput(); err != nil {
+		t.Fatalf("build workflow CLI: %v\n%s", err, output)
+	}
+	return path
+}
+
+func writeWorkflowToolProxy(t *testing.T) string {
+	t.Helper()
+	const module = "gitea.maximumdirect.net/eric/ReleaseKit"
+	const helper = "example.com/releasekit-helper"
+	proxyDir := t.TempDir()
+	moduleFile := "module " + module + "\n\ngo 1.25.0\n\nrequire " + helper + " v1.0.0\n"
+	for _, version := range []string{"v0.2.197", "v0.2.198"} {
+		main := fmt.Sprintf(`package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	helper "%s"
+)
+
+func main() {
+	fmt.Println("tool-version=%s helper=" + helper.Version)
+	command := exec.Command(os.Getenv("RELEASEKIT_TEST_BINARY"), os.Args[1:]...)
+	command.Env = os.Environ()
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	if err := command.Run(); err != nil {
+		if exit, ok := err.(*exec.ExitError); ok { os.Exit(exit.ExitCode()) }
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+`, helper, version)
+		files := map[string]string{
+			"cmd/releasekit/main.go":          main,
+			"buildinfo/version.go":            "package buildinfo\nimport \"gitea.maximumdirect.net/eric/ReleaseKit/internal/runtimeinfo\"\nfunc Version() string { return runtimeinfo.Version() }\n",
+			"internal/runtimeinfo/version.go": "package runtimeinfo\nvar injectedVersion string\nfunc Version() string { if injectedVersion != \"\" { return injectedVersion }; return \"dev\" }\n",
+		}
+		writeModuleProxyVersion(t, proxyDir, module, version, moduleFile, files)
+	}
+	writeModuleProxyVersion(t, proxyDir, helper, "v1.0.0", "module "+helper+"\n\ngo 1.25.0\n", map[string]string{"helper.go": "package helper\nconst Version = \"tagged dependency\"\n"})
+	return proxyDir
+}
+
+func newWorkflowRepository(t *testing.T, example string) string {
+	t.Helper()
+	repository := filepath.Join(t.TempDir(), "multi module checkout")
+	if err := os.Mkdir(repository, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	copyExampleTree(t, example, repository)
+	for _, selection := range []struct{ directory, module string }{
+		{".", "example.com/multi-module-consumer"},
+		{"integrations/ckconfig", "example.com/multi-module-consumer/integrations/ckconfig"},
+		{"integrations/core/v2", "example.com/multi-module-consumer/integrations/core/v2"},
+	} {
+		writeRepositoryFile(t, repository, selection.directory+"/go.mod", workflowModuleFile(selection.module, "v0.2.197"))
+	}
+	cliGitRun(t, repository, "init", "--initial-branch=main")
+	cliGitRun(t, repository, "config", "user.name", "ReleaseKit Test")
+	cliGitRun(t, repository, "config", "user.email", "releasekit@example.test")
+	cliGitRun(t, repository, "config", "commit.gpgsign", "false")
+	return repository
+}
+
+func workflowModuleFile(module, version string) string {
+	return fmt.Sprintf("module %s\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit %s\n", module, version)
+}
+
+func workflowDeliverySettings(baseURL string) *cli.DeliverySettings {
+	return &cli.DeliverySettings{BaseURL: baseURL, Owner: "owner", Repository: "example", TokenEnv: "RELEASEKIT_GITEA_TOKEN"}
+}
+
+func writeMappedProfile(t *testing.T, repository, name string, settings cli.Settings) {
+	t.Helper()
+	contents, err := json.MarshalIndent(settings, "", "  ")
+	if err != nil {
+		t.Fatal(err)
+	}
+	writeRepositoryFile(t, repository, name, string(contents)+"\n")
+}
+
+func tagAndPushWorkflowRepository(t *testing.T, repository, tag string) string {
+	t.Helper()
+	cliGitRun(t, repository, "add", "--all")
+	cliGitRun(t, repository, "commit", "-m", "prepare mapped delivery")
+	commit := cliGitOutput(t, repository, "rev-parse", "HEAD")
+	cliGitRun(t, repository, "tag", tag)
+	remote := filepath.Join(filepath.Dir(repository), "origin.git")
+	cliGitRun(t, repository, "init", "--bare", remote)
+	cliGitRun(t, repository, "remote", "add", "origin", remote)
+	cliGitRun(t, repository, "push", "origin", "HEAD:refs/heads/main", "refs/tags/"+tag)
+	return commit
+}
+
+func multiModuleWorkflowEnvironment(t *testing.T, repository, commit, tag, binary, proxy string) map[string]string {
+	t.Helper()
+	goDir, goLog := installGoBootstrapShim(t)
+	environment := templateEnvironment(repository, commit, goDir, goLog)
+	environment["CI_COMMIT_TAG"] = tag
+	environment["RELEASEKIT_TEST_BINARY"] = binary
+	useSyntheticModuleProxy(t, environment, "file://"+filepath.ToSlash(proxy))
+	cache := environment["GOMODCACHE"]
+	t.Cleanup(func() {
+		_ = filepath.WalkDir(cache, func(path string, entry fs.DirEntry, err error) error {
+			if err == nil && entry.IsDir() {
+				_ = os.Chmod(path, 0o700)
+			}
+			return nil
+		})
+	})
+	return environment
+}
+
+func prepareWorkflowModuleSum(t *testing.T, repository, moduleDir, proxy string) {
+	t.Helper()
+	cache := t.TempDir()
+	t.Cleanup(func() {
+		_ = filepath.WalkDir(cache, func(path string, entry fs.DirEntry, err error) error {
+			if err == nil && entry.IsDir() {
+				_ = os.Chmod(path, 0o700)
+			}
+			return nil
+		})
+	})
+	command := exec.Command("go", "mod", "download", "gitea.maximumdirect.net/eric/ReleaseKit@v0.2.197")
+	command.Dir = filepath.Join(repository, filepath.FromSlash(moduleDir))
+	command.Env = append(os.Environ(), "GOMODCACHE="+cache, "GOPROXY=file://"+filepath.ToSlash(proxy), "GOSUMDB=off", "GOWORK=off", "GOTOOLCHAIN=local", "GOFLAGS=-modcacherw")
+	if output, err := command.CombinedOutput(); err != nil {
+		t.Fatalf("prepare tagged module sums: %v\n%s", err, output)
+	}
+}
+
+func readWorkflowFile(t *testing.T, repository, name string) string {
+	t.Helper()
+	contents, err := os.ReadFile(filepath.Join(repository, filepath.FromSlash(name)))
+	if err != nil {
+		t.Fatal(err)
+	}
+	return string(contents)
+}

cmd/releasekit/releasekit_delivery_workflow_test.go

@@ -50,14 +50,14 @@ func TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout(t *testing.T) {
 	cliGitRun(t, repository, "add", "docs/releases/"+version+".md")
 	cliGitRun(t, repository, "commit", "-m", "prepare source-only delivery")
 
-	state := &deliveryServerState{product: "ReleaseKit"}
+	state := &deliveryServerState{data: deliveryServerData{product: "ReleaseKit"}}
 	server := newDeliveryServer(t, state)
 	defer server.Close()
 	writeDeliveryProfile(t, repository, cli.Settings{
 		Product:  "ReleaseKit",
 		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 	})
-	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
+	state.update(func(state *deliveryServerData) { state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD") })
 	cliGitRun(t, repository, "tag", "-a", version, "-m", "ReleaseKit v1.2.3")
 
 	remote := filepath.Join(t.TempDir(), "origin.git")
@@ -78,7 +78,7 @@ func TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout(t *testing.T) {
 	}
 	env := map[string]string{
 		"CI_WORKSPACE":           repository,
-		"CI_COMMIT_SHA":          state.commit,
+		"CI_COMMIT_SHA":          state.snapshot().commit,
 		"CI_COMMIT_TAG":          version,
 		"RELEASEKIT_GITEA_TOKEN": "fixture-token",
 		"GOTOOLCHAIN":            "local",
@@ -87,14 +87,14 @@ func TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout(t *testing.T) {
 	}
 	command := strings.ReplaceAll(block, "$${", "${")
 
-	state.remoteCommit = strings.Repeat("f", 40)
+	state.update(func(state *deliveryServerData) { state.remoteCommit = strings.Repeat("f", 40) })
 	if output, err := executeWoodpeckerBlock(command, repository, env); err == nil {
 		t.Fatalf("delivery with a mismatched hosted tag succeeded: %s", output)
 	}
-	if state.releaseCreates != 0 || cliGitOutput(t, repository, "rev-parse", "refs/tags/"+version+"^{commit}") != state.commit {
+	if state.snapshot().releaseCreates != 0 || cliGitOutput(t, repository, "rev-parse", "refs/tags/"+version+"^{commit}") != state.snapshot().commit {
 		t.Fatal("delivery failure changed hosted release state or source tag")
 	}
-	state.remoteCommit = ""
+	state.update(func(state *deliveryServerData) { state.remoteCommit = "" })
 
 	for attempt := 0; attempt < 2; attempt++ {
 		output := runWoodpeckerBlock(t, command, repository, env)
@@ -102,14 +102,14 @@ func TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout(t *testing.T) {
 			t.Fatalf("delivery attempt %d output = %q", attempt+1, output)
 		}
 	}
-	if state.releaseCreates != 1 || state.assetUploads != 0 || state.assetListReads != 0 {
-		t.Fatalf("page-only workflow calls = creates:%d uploads:%d asset reads:%d", state.releaseCreates, state.assetUploads, state.assetListReads)
+	if state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 0 || state.snapshot().assetListReads != 0 {
+		t.Fatalf("page-only workflow calls = creates:%d uploads:%d asset reads:%d", state.snapshot().releaseCreates, state.snapshot().assetUploads, state.snapshot().assetListReads)
 	}
-	if state.noteBody != note {
-		t.Fatalf("hosted note body = %q, want complete note %q", state.noteBody, note)
+	if state.snapshot().noteBody != note {
+		t.Fatalf("hosted note body = %q, want complete note %q", state.snapshot().noteBody, note)
 	}
-	if got := cliGitOutput(t, repository, "rev-parse", "refs/tags/"+version+"^{commit}"); got != state.commit {
-		t.Fatalf("source tag moved after delivery: %s, want %s", got, state.commit)
+	if got := cliGitOutput(t, repository, "rev-parse", "refs/tags/"+version+"^{commit}"); got != state.snapshot().commit {
+		t.Fatalf("source tag moved after delivery: %s, want %s", got, state.snapshot().commit)
 	}
 	if status := cliGitOutput(t, repository, "status", "--porcelain"); status != "" {
 		t.Fatalf("tagged checkout became dirty after delivery: %s", status)

cmd/releasekit/repository_test.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestNativeCheckFromChildUsesRootProfileAndSuite(t *testing.T) {
+	binary := buildWorkflowCLI(t, cliRepositoryRoot(t))
+	repository := newCLIRepository(t)
+	writeRepositoryFile(t, repository, "candidate_test.go", "package candidate\nimport \"testing\"\nfunc TestFixture(t *testing.T) { t.Fatal(\"root suite failure\") }\n")
+	writeRepositoryFile(t, repository, "releasekit.json", `{"product":"Example Product"}`)
+	writeRepositoryFile(t, repository, "apps/widget/go.mod", "module example.com/widget\n\ngo 1.26.0\n")
+	writeRepositoryFile(t, repository, "apps/widget/widget_test.go", "package widget\nimport \"testing\"\nfunc TestWidget(t *testing.T) {}\n")
+	cliGitRun(t, repository, "add", ".")
+	cliGitRun(t, repository, "commit", "-m", "Add failing root and passing child")
+	command := exec.Command(binary, "check", "v1.2.3")
+	command.Dir = filepath.Join(repository, "apps", "widget")
+	output, err := command.CombinedOutput()
+	if exit, ok := err.(*exec.ExitError); !ok || exit.ExitCode() != 1 || !strings.Contains(string(output), "root suite failure") || !strings.Contains(string(output), "module=example.com/cli-candidate") {
+		t.Fatalf("child invocation error = %v, output = %s", err, output)
+	}
+}
+
+func TestNativeBuildClassifiesInvalidVersionBeforeSourceAccess(t *testing.T) {
+	binary := buildWorkflowCLI(t, cliRepositoryRoot(t))
+	command := exec.Command(binary, "build", "--repo", filepath.Join(t.TempDir(), "absent"), "bad-version")
+	output, err := command.CombinedOutput()
+	if exit, ok := err.(*exec.ExitError); !ok || exit.ExitCode() != 2 || !strings.Contains(string(output), "stable vMAJOR.MINOR.PATCH") {
+		t.Fatalf("invalid build error = %v, output = %s", err, output)
+	}
+}

cmd/releasekit/woodpecker_test.go

@@ -42,7 +42,7 @@ func TestWoodpeckerTagDeliveryTemplate(t *testing.T) {
 			Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 		})
 		commit := pushTaggedCLIRepository(t, repository)
-		state.commit = commit
+		state.update(func(state *deliveryServerData) { state.commit = commit })
 
 		goDir, goLog := installGoBootstrapShim(t)
 		env := templateEnvironment(repository, commit, goDir, goLog)
@@ -51,8 +51,8 @@ func TestWoodpeckerTagDeliveryTemplate(t *testing.T) {
 		if !strings.Contains(output, "state complete") {
 			t.Fatalf("delivery output=%q", output)
 		}
-		if state.releaseCreates != 1 || state.assetUploads != 0 {
-			t.Fatalf("source-only calls = creates:%d uploads:%d", state.releaseCreates, state.assetUploads)
+		if state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 0 {
+			t.Fatalf("source-only calls = creates:%d uploads:%d", state.snapshot().releaseCreates, state.snapshot().assetUploads)
 		}
 		assertModuleBootstrap(t, repository, goLog, moduleBefore)
 	})
@@ -73,7 +73,7 @@ func TestWoodpeckerTagDeliveryTemplate(t *testing.T) {
 			Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
 		})
 		commit := pushTaggedCLIRepository(t, repository)
-		state.commit = commit
+		state.update(func(state *deliveryServerData) { state.commit = commit })
 
 		goDir, goLog := installGoBootstrapShim(t)
 		env := templateEnvironment(repository, commit, goDir, goLog)
@@ -88,14 +88,14 @@ func TestWoodpeckerTagDeliveryTemplate(t *testing.T) {
 				t.Fatalf("second delivery did not reuse matching assets: %q", output)
 			}
 		}
-		if state.releaseCreates != 1 || state.assetUploads != 2 {
-			t.Fatalf("binary calls = creates:%d uploads:%d", state.releaseCreates, state.assetUploads)
+		if state.snapshot().releaseCreates != 1 || state.snapshot().assetUploads != 2 {
+			t.Fatalf("binary calls = creates:%d uploads:%d", state.snapshot().releaseCreates, state.snapshot().assetUploads)
 		}
-		if _, ok := state.assets["helper-v1.2.3-"+runtime.GOOS+"-"+runtime.GOARCH]; !ok {
-			t.Fatalf("binary asset was not delivered: %#v", state.assets)
+		if _, ok := state.snapshot().assets["helper-v1.2.3-"+runtime.GOOS+"-"+runtime.GOARCH]; !ok {
+			t.Fatalf("binary asset was not delivered: %#v", state.snapshot().assets)
 		}
-		if _, ok := state.assets["SHA256SUMS"]; !ok {
-			t.Fatalf("checksum manifest was not delivered: %#v", state.assets)
+		if _, ok := state.snapshot().assets["SHA256SUMS"]; !ok {
+			t.Fatalf("checksum manifest was not delivered: %#v", state.snapshot().assets)
 		}
 		assertModuleBootstrap(t, repository, goLog, moduleBefore, sumBefore)
 	})
@@ -140,7 +140,7 @@ func TestWoodpeckerTagDeliveryTemplate(t *testing.T) {
 			t.Fatalf("template error = %v, want propagated exit 37; output=%q", err, output)
 		}
 		args := readWoodpeckerFixtureFile(t, toolArgs)
-		for _, expected := range []string{"<ci-deliver>", "<--repo>", "<" + repository + ">", "<--commit>", "<" + strings.ToUpper(commit) + ">", "<v1.2.3>"} {
+		for _, expected := range []string{"<ci-deliver>", "<--repo>", "<" + repository + ">", "<--prepared>", "<--commit>", "<" + strings.ToUpper(commit) + ">", "<v1.2.3>"} {
 			if !strings.Contains(args, expected) {
 				t.Errorf("selected executable arguments %q omit %q", args, expected)
 			}
@@ -284,7 +284,7 @@ func TestWoodpeckerSourceDeliveryTemplateSelfBootstraps(t *testing.T) {
 	if proxyRequests.Load() == 0 {
 		t.Fatal("self-bootstrap did not prepare its dependency from the local proxy")
 	}
-	if !strings.Contains(output, `"ci-deliver"`) || !strings.Contains(output, `"`+repository+`"`) || !strings.Contains(output, `"v1.2.3"`) {
+	if !strings.Contains(output, `"ci-deliver"`) || !strings.Contains(output, `"`+repository+`"`) || !strings.Contains(output, `"--prepared"`) || !strings.Contains(output, `"v1.2.3"`) {
 		t.Fatalf("self-bootstrapped command arguments = %q", output)
 	}
 	log := readWoodpeckerFixtureFile(t, goLog)

delivery.go

@@ -45,10 +45,16 @@ type DeliveryAsset struct {
 // page-only delivery when both are nil. Build with no targets, or an empty
 // Prebuilt result, also performs page-only delivery.
 type DeliveryRequest struct {
-	RepositoryDir string
-	Product       string
-	Version       string
-	Destination   GiteaDestination
+	RepositoryDir string // directory within the tagged source Git checkout.
+	// ModuleDir selects a repository-relative module directory; empty selects
+	// the repository root.
+	ModuleDir string
+	Product   string
+	Version   string
+	// ExpectedTag optionally requires the full CI event tag to match the
+	// selected module's derived tag before building or making hosted requests.
+	ExpectedTag string
+	Destination GiteaDestination
 	// Build selects binaries to build in temporary storage outside the checkout.
 	Build *BuildSpec
 	// Prebuilt supplies an existing build whose files remain caller-owned.
@@ -62,7 +68,11 @@ type DeliveryRequest struct {
 // current observations: an asset appears in at most one slice, and early
 // failures may leave some declared assets unreported.
 type DeliveryResult struct {
-	Version         string
+	RepositoryDir   string
+	ModuleDir       string
+	ModulePath      string
+	Tag             string // complete derived Git tag.
+	Version         string // selected stable semantic version.
 	CandidateCommit string
 	ReleaseURL      string
 	State           DeliveryState
@@ -83,6 +93,9 @@ type DeliveryResult struct {
 // requests are compiled into temporary storage that Deliver removes on return.
 // Prebuilt artifacts remain caller-owned and are not removed. Both paths
 // validate source identity and artifact contents before hosted writes.
+// Module selection and declaration links resolve from the captured commit.
+// Page-only delivery can use a sparse checkout with available committed objects;
+// managed builds require their selected source files in the working tree.
 func Deliver(ctx context.Context, request DeliveryRequest) (DeliveryResult, error) {
 	result := DeliveryResult{Version: request.Version, State: DeliveryNotAttempted}
 	destination := gitea.Destination{
@@ -95,13 +108,19 @@ func Deliver(ctx context.Context, request DeliveryRequest) (DeliveryResult, erro
 	}
 	internalResult, err := internaldelivery.Deliver(ctx, internaldelivery.Request{
 		RepositoryDir: request.RepositoryDir,
+		ModuleDir:     request.ModuleDir,
 		Product:       request.Product,
 		Version:       request.Version,
+		ExpectedTag:   request.ExpectedTag,
 		Destination:   destination,
 		Build:         internalBuildSpec(request.Build),
 		Prebuilt:      prebuilt,
 		Output:        request.Output,
 	})
+	result.RepositoryDir = internalResult.RepositoryDir
+	result.ModuleDir = internalResult.ModuleDir
+	result.ModulePath = internalResult.ModulePath
+	result.Tag = internalResult.Tag
 	result.CandidateCommit = internalResult.CandidateCommit
 	result.ReleaseURL = internalResult.ReleaseURL
 	result.State = DeliveryState(internalResult.State)

delivery_reads_linux_test.go

@@ -0,0 +1,67 @@
+package releasekit_test
+
+import (
+	"encoding/binary"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"syscall"
+	"testing"
+
+	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
+)
+
+func TestDeliverReadsLocalBinaryOnceForVerificationAndOnceForUpload(t *testing.T) {
+	repository, build, expected := newDeliveryBenchmarkFixture(t)
+	watcher, err := syscall.InotifyInit1(syscall.IN_NONBLOCK | syscall.IN_CLOEXEC)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer syscall.Close(watcher)
+	// Close events separate successive opens so inotify cannot coalesce them.
+	if _, err := syscall.InotifyAddWatch(watcher, build.Artifacts[0].Path, syscall.IN_OPEN|syscall.IN_CLOSE_NOWRITE); err != nil {
+		t.Fatal(err)
+	}
+	state := &deliveryBenchmarkServer{commit: build.CandidateCommit, assets: expected}
+	state.reset(false)
+	server := httptest.NewUnstartedServer(http.HandlerFunc(state.serveHTTP))
+	state.baseURL = "http://" + server.Listener.Addr().String()
+	server.Start()
+	defer server.Close()
+	result, err := releasekit.Deliver(t.Context(), releasekit.DeliveryRequest{
+		RepositoryDir: repository, Product: "Sample App", Version: build.Version,
+		Destination: facadeDeliveryDestination(server.URL), Prebuilt: &build,
+	})
+	if err != nil || result.State != releasekit.DeliveryComplete || len(result.Uploaded) != len(expected) {
+		t.Fatalf("delivery = %#v, error = %v", result, err)
+	}
+	state.verifyUploads(t)
+	opens := 0
+	var events [256]byte
+	for {
+		n, err := syscall.Read(watcher, events[:])
+		if errors.Is(err, syscall.EAGAIN) {
+			break
+		}
+		if errors.Is(err, syscall.EINTR) {
+			continue
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+		for offset := 0; offset < n; {
+			mask := binary.NativeEndian.Uint32(events[offset+4:])
+			if mask&syscall.IN_Q_OVERFLOW != 0 {
+				t.Fatal("artifact event queue overflowed")
+			}
+			if mask&syscall.IN_OPEN != 0 {
+				opens++
+			}
+			nameLength := binary.NativeEndian.Uint32(events[offset+12:])
+			offset += syscall.SizeofInotifyEvent + int(nameLength)
+		}
+	}
+	if opens != 2 {
+		t.Fatalf("local binary opened %d times; want one verification read and one upload read", opens)
+	}
+}

delivery_test.go

@@ -8,10 +8,12 @@ import (
 	"io"
 	"net/http"
 	"net/http/httptest"
+	"net/url"
 	"os"
 	"path/filepath"
 	"runtime"
 	"strings"
+	"sync"
 	"testing"
 
 	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
@@ -40,11 +42,12 @@ func TestDeliverManagedBuildUploadsArtifactsAndCleansTemporaryOutput(t *testing.
 	if err != nil {
 		t.Fatalf("Deliver() error = %v; result = %#v", err, result)
 	}
-	if result.State != releasekit.DeliveryComplete || result.CandidateCommit != remote.commit {
+	observed := remote.snapshot()
+	if result.State != releasekit.DeliveryComplete || result.CandidateCommit != observed.commit {
 		t.Fatalf("delivery result = %#v", result)
 	}
-	if len(result.Uploaded) != 2 || len(remote.assets) != 2 {
-		t.Fatalf("uploaded = %#v; hosted assets = %v", result.Uploaded, mapKeys(remote.assets))
+	if len(result.Uploaded) != 2 || len(observed.assets) != 2 {
+		t.Fatalf("uploaded = %#v; hosted assets = %v", result.Uploaded, mapKeys(observed.assets))
 	}
 	if !strings.Contains(progress.String(), "checking fixture version output") {
 		t.Fatalf("build progress = %q", progress.String())
@@ -78,7 +81,8 @@ func TestDeliverBinaryConsumerWithBuildinfoAndSelectedTargets(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Deliver() error = %v; result = %#v", err, result)
 	}
-	if result.State != releasekit.DeliveryComplete || result.CandidateCommit != remote.commit {
+	observed := remote.snapshot()
+	if result.State != releasekit.DeliveryComplete || result.CandidateCommit != observed.commit {
 		t.Fatalf("delivery result = %#v", result)
 	}
 	wantAssets := []string{
@@ -86,12 +90,12 @@ func TestDeliverBinaryConsumerWithBuildinfoAndSelectedTargets(t *testing.T) {
 		"fixture-v1.2.3-linux-arm64",
 		"SHA256SUMS",
 	}
-	if len(result.Uploaded) != len(wantAssets) || len(remote.assets) != len(wantAssets) {
-		t.Fatalf("uploaded = %#v; hosted assets = %v", result.Uploaded, mapKeys(remote.assets))
+	if len(result.Uploaded) != len(wantAssets) || len(observed.assets) != len(wantAssets) {
+		t.Fatalf("uploaded = %#v; hosted assets = %v", result.Uploaded, mapKeys(observed.assets))
 	}
 	for _, name := range wantAssets {
-		if _, ok := remote.assets[name]; !ok {
-			t.Errorf("hosted assets omit %q: %v", name, mapKeys(remote.assets))
+		if _, ok := observed.assets[name]; !ok {
+			t.Errorf("hosted assets omit %q: %v", name, mapKeys(observed.assets))
 		}
 	}
 	if !strings.Contains(progress.String(), "checking fixture version output") {
@@ -173,8 +177,8 @@ func TestDeliverRejectsSameSizePrebuiltTamperingBeforeHostedWrites(t *testing.T)
 	if err == nil || !strings.Contains(err.Error(), "verify build assets") || result.State != releasekit.DeliveryNotAttempted {
 		t.Fatalf("Deliver() = %#v, %v; want local asset verification failure", result, err)
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none before local verification", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none before local verification", remote.snapshot().requests)
 	}
 }
 
@@ -190,6 +194,14 @@ func TestDeliverPageOnlySkipsBuildAndHostedAssets(t *testing.T) {
 	} {
 		t.Run(test.name, func(t *testing.T) {
 			repository := newTaggedDeliveryConsumer(t)
+			prebuilt := test.prebuilt
+			if prebuilt != nil {
+				built, err := releasekit.Build(context.Background(), releasekit.BuildRequest{RepositoryDir: repository, Version: "v1.2.3"})
+				if err != nil {
+					t.Fatalf("Build() for page-only prebuilt identity = %#v, %v", built, err)
+				}
+				prebuilt = &built
+			}
 			temporaryRoot := t.TempDir()
 			t.Setenv("TMPDIR", temporaryRoot)
 			server, remote := newFacadeDeliveryServer(t, repository)
@@ -202,14 +214,14 @@ func TestDeliverPageOnlySkipsBuildAndHostedAssets(t *testing.T) {
 				Version:       "v1.2.3",
 				Destination:   facadeDeliveryDestination(server.URL),
 				Build:         test.build,
-				Prebuilt:      test.prebuilt,
+				Prebuilt:      prebuilt,
 				Output:        &progress,
 			})
 			if err != nil || result.State != releasekit.DeliveryComplete {
 				t.Fatalf("Deliver() = %#v, %v", result, err)
 			}
-			if len(remote.assets) != 0 || len(result.Uploaded) != 0 || len(result.Pending) != 0 {
-				t.Fatalf("page-only delivery included assets: result=%#v assets=%v", result, mapKeys(remote.assets))
+			if len(remote.snapshot().assets) != 0 || len(result.Uploaded) != 0 || len(result.Pending) != 0 {
+				t.Fatalf("page-only delivery included assets: result=%#v assets=%v", result, mapKeys(remote.snapshot().assets))
 			}
 			if progress.Len() != 0 {
 				t.Fatalf("page-only delivery emitted build progress: %q", progress.String())
@@ -221,6 +233,108 @@ func TestDeliverPageOnlySkipsBuildAndHostedAssets(t *testing.T) {
 	}
 }
 
+func TestDeliverUsesCommittedModuleIdentityForSeparatePages(t *testing.T) {
+	repository := newTwoModuleDeliveryConsumer(t)
+	server, remote := newFacadeDeliveryServer(t, repository)
+	defer server.Close()
+
+	wrongTag, err := releasekit.Deliver(context.Background(), releasekit.DeliveryRequest{
+		RepositoryDir: repository,
+		Product:       "Fixture",
+		Version:       "v1.2.3",
+		ExpectedTag:   "integrations/wrong/v1.2.3",
+		Destination:   facadeDeliveryDestination(server.URL),
+	})
+	if err == nil || wrongTag.Tag != "v1.2.3" || remote.snapshot().requests != 0 {
+		t.Fatalf("delivery with inconsistent expected tag = %#v, %v; hosted requests %d", wrongTag, err, remote.snapshot().requests)
+	}
+
+	rootResult, err := releasekit.Deliver(context.Background(), releasekit.DeliveryRequest{
+		RepositoryDir: repository,
+		Product:       "Fixture",
+		Version:       "v1.2.3",
+		ExpectedTag:   "v1.2.3",
+		Destination:   facadeDeliveryDestination(server.URL),
+	})
+	if err != nil || rootResult.State != releasekit.DeliveryComplete || rootResult.Tag != "v1.2.3" {
+		t.Fatalf("root delivery = %#v, %v", rootResult, err)
+	}
+
+	nestedTag := "integrations/ckconfig/v1.2.3"
+	remote.update(func(remote *facadeDeliveryData) {
+		remote.tag = nestedTag
+		remote.noteBody = "# Fixture v1.2.3\n\nNested delivery fixture.\n"
+	})
+	nestedResult, err := releasekit.Deliver(context.Background(), releasekit.DeliveryRequest{
+		RepositoryDir: repository,
+		ModuleDir:     "integrations/ckconfig",
+		Product:       "Fixture",
+		Version:       "v1.2.3",
+		ExpectedTag:   nestedTag,
+		Destination:   facadeDeliveryDestination(server.URL),
+	})
+	if err != nil || nestedResult.State != releasekit.DeliveryComplete || nestedResult.Tag != nestedTag || nestedResult.ModulePath != "example.com/ckconfig" {
+		t.Fatalf("nested delivery = %#v, %v", nestedResult, err)
+	}
+	if len(remote.snapshot().pages) != 2 || !remote.snapshot().pages["v1.2.3"] || !remote.snapshot().pages[nestedTag] {
+		t.Fatalf("created hosted pages = %#v", remote.snapshot().pages)
+	}
+}
+
+func TestDeliverRejectsPrebuiltArtifactsForAnotherModuleBeforeHostedRequests(t *testing.T) {
+	repository := newTwoModuleDeliveryConsumer(t)
+	prebuilt, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
+		RepositoryDir: repository,
+		Version:       "v1.2.3",
+		Spec: releasekit.BuildSpec{
+			MainPackage: "./cmd/app",
+			BinaryName:  "fixture",
+			Targets:     []releasekit.Target{{OS: runtime.GOOS, Arch: runtime.GOARCH}},
+		},
+		OutputDir: filepath.Join(t.TempDir(), "root-artifacts"),
+	})
+	if err != nil || !prebuilt.SourceVerified {
+		t.Fatalf("root Build() = %#v, %v", prebuilt, err)
+	}
+	server, remote := newFacadeDeliveryServer(t, repository)
+	defer server.Close()
+	remote.update(func(remote *facadeDeliveryData) { remote.tag = "integrations/ckconfig/v1.2.3" })
+	result, err := releasekit.Deliver(context.Background(), releasekit.DeliveryRequest{
+		RepositoryDir: repository,
+		ModuleDir:     "integrations/ckconfig",
+		Product:       "Fixture",
+		Version:       "v1.2.3",
+		ExpectedTag:   remote.snapshot().tag,
+		Destination:   facadeDeliveryDestination(server.URL),
+		Prebuilt:      &prebuilt,
+	})
+	if err == nil || !strings.Contains(err.Error(), "selected tagged module") || result.Tag != remote.snapshot().tag {
+		t.Fatalf("nested delivery with root artifacts = %#v, %v", result, err)
+	}
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests before prebuilt identity rejection = %d", remote.snapshot().requests)
+	}
+}
+
+func newTwoModuleDeliveryConsumer(t *testing.T) string {
+	t.Helper()
+	repository := newTaggedDeliveryConsumer(t)
+	writeNestedBuildConsumer(t, repository, "integrations/ckconfig", "example.com/ckconfig", `package main
+import (
+	"fmt"
+	"os"
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+func main() { if len(os.Args) == 2 && os.Args[1] == "version" { fmt.Println("fixture", buildinfo.Version()) } }
+`)
+	writeBuildFixture(t, repository, "integrations/ckconfig/docs/releases/v1.2.3.md", "# Fixture v1.2.3\n\nNested delivery fixture.\n")
+	buildGit(t, repository, "add", "--all")
+	buildGit(t, repository, "commit", "-m", "add nested release module")
+	buildGit(t, repository, "tag", "-f", "v1.2.3")
+	buildGit(t, repository, "tag", "integrations/ckconfig/v1.2.3")
+	return repository
+}
+
 func TestDeliverRejectsDirtyTaggedSourceBeforeBuildOrHostedWrites(t *testing.T) {
 	repository := newTaggedDeliveryConsumer(t)
 	writeBuildFixture(t, repository, "local-change.txt", "dirty source")
@@ -242,19 +356,20 @@ func TestDeliverRejectsDirtyTaggedSourceBeforeBuildOrHostedWrites(t *testing.T)
 		},
 		Output: &progress,
 	})
-	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.commit {
+	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.snapshot().commit {
 		t.Fatalf("Deliver() = %#v, %v; want preflight failure for known commit", result, err)
 	}
 	if progress.Len() != 0 {
 		t.Fatalf("build started before source eligibility passed: %q", progress.String())
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 }
 
 func TestDeliverRejectsCheckoutAwayFromTagBeforeBuildOrHostedWrites(t *testing.T) {
 	repository := newTaggedDeliveryConsumer(t)
+	tagCommit := buildGit(t, repository, "rev-parse", "HEAD")
 	writeBuildFixture(t, repository, "later-change.txt", "new commit")
 	buildGit(t, repository, "add", "--all")
 	buildGit(t, repository, "commit", "-m", "advance checkout after release tag")
@@ -276,14 +391,14 @@ func TestDeliverRejectsCheckoutAwayFromTagBeforeBuildOrHostedWrites(t *testing.T
 		},
 		Output: &progress,
 	})
-	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit == remote.commit {
+	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit == tagCommit {
 		t.Fatalf("Deliver() = %#v, %v; want tag/HEAD mismatch", result, err)
 	}
 	if progress.Len() != 0 {
 		t.Fatalf("build started before tag/HEAD agreement: %q", progress.String())
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 }
 
@@ -307,14 +422,14 @@ func TestDeliverRejectsInvalidCommittedNoteBeforeBuildOrHostedWrites(t *testing.
 		},
 		Output: &progress,
 	})
-	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.commit {
+	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.snapshot().commit {
 		t.Fatalf("Deliver() = %#v, %v; want committed-note preflight failure", result, err)
 	}
 	if progress.Len() != 0 {
 		t.Fatalf("build started before committed-note validation: %q", progress.String())
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 }
 
@@ -348,8 +463,8 @@ func TestDeliverManagedBuildRejectsCheckoutMutationBeforeHostedWrites(t *testing
 	if err == nil || !strings.Contains(err.Error(), "build source") || result.State != releasekit.DeliveryNotAttempted {
 		t.Fatalf("Deliver() = %#v, %v; want build-source eligibility failure", result, err)
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 	if entries, err := os.ReadDir(temporaryRoot); err != nil || len(entries) != 0 {
 		t.Fatalf("ineligible managed build output remains: entries=%v error=%v", entries, err)
@@ -374,11 +489,11 @@ func TestDeliverManagedBuildFailureCleansTemporaryOutputBeforeHostedWrites(t *te
 			Targets:     []releasekit.Target{{OS: runtime.GOOS, Arch: runtime.GOARCH}},
 		},
 	})
-	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.commit {
+	if err == nil || result.State != releasekit.DeliveryNotAttempted || result.CandidateCommit != remote.snapshot().commit {
 		t.Fatalf("Deliver() = %#v, %v; want managed build failure before hosted writes", result, err)
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 	if entries, err := os.ReadDir(temporaryRoot); err != nil || len(entries) != 0 {
 		t.Fatalf("failed managed build output remains: entries=%v error=%v", entries, err)
@@ -410,8 +525,8 @@ func TestDeliverManagedBuildCancellationCleansTemporaryOutput(t *testing.T) {
 	if !errors.Is(err, context.Canceled) || result.State != releasekit.DeliveryNotAttempted {
 		t.Fatalf("Deliver() = %#v, %v; want cancellation before hosted writes", result, err)
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 	if entries, err := os.ReadDir(temporaryRoot); err != nil || len(entries) != 0 {
 		t.Fatalf("canceled managed build output remains: entries=%v error=%v", entries, err)
@@ -434,8 +549,8 @@ func TestDeliverRejectsBothBuildSourcesBeforeHostedWrites(t *testing.T) {
 	if err == nil || result.State != releasekit.DeliveryNotAttempted || !strings.Contains(err.Error(), "both") {
 		t.Fatalf("Deliver() = %#v, %v; want invalid build-source combination", result, err)
 	}
-	if remote.requests != 0 {
-		t.Fatalf("hosted requests = %d, want none", remote.requests)
+	if remote.snapshot().requests != 0 {
+		t.Fatalf("hosted requests = %d, want none", remote.snapshot().requests)
 	}
 }
 
@@ -472,9 +587,41 @@ func (writer deliveryCancelWriter) Write(content []byte) (int, error) {
 }
 
 type facadeDeliveryServer struct {
+	mu   sync.Mutex
+	data facadeDeliveryData
+}
+
+func (state *facadeDeliveryServer) update(change func(*facadeDeliveryData)) {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	change(&state.data)
+}
+
+func (state *facadeDeliveryServer) snapshot() facadeDeliveryData {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	result := state.data
+
+	result.assets = make(map[string][]byte, len(state.data.assets))
+	for key, value := range state.data.assets {
+		result.assets[key] = append([]byte(nil), value...)
+	}
+
+	result.pages = make(map[string]bool, len(state.data.pages))
+	for key, value := range state.data.pages {
+		result.pages[key] = value
+	}
+
+	return result
+}
+
+type facadeDeliveryData struct {
 	t        *testing.T
 	commit   string
-	page     bool
+	tag      string
+	version  string
+	noteBody string
+	pages    map[string]bool
 	requests int
 	assets   map[string][]byte
 	url      string
@@ -482,24 +629,28 @@ type facadeDeliveryServer struct {
 
 func newFacadeDeliveryServer(t *testing.T, repository string) (*httptest.Server, *facadeDeliveryServer) {
 	t.Helper()
-	state := &facadeDeliveryServer{t: t, commit: buildGit(t, repository, "rev-parse", "HEAD"), assets: make(map[string][]byte)}
-	server := httptest.NewServer(http.HandlerFunc(state.serveHTTP))
-	state.url = server.URL
+	state := &facadeDeliveryServer{data: facadeDeliveryData{t: t, commit: buildGit(t, repository, "rev-parse", "HEAD"), tag: "v1.2.3", version: "v1.2.3", noteBody: "# Fixture v1.2.3\n\nDelivery fixture.\n", pages: make(map[string]bool), assets: make(map[string][]byte)}}
+	server := httptest.NewUnstartedServer(http.HandlerFunc(state.serveHTTP))
+	state.data.url = "http://" + server.Listener.Addr().String()
+	server.Start()
 	return server, state
 }
 
 func (state *facadeDeliveryServer) serveHTTP(w http.ResponseWriter, r *http.Request) {
+	state.mu.Lock()
+	defer state.mu.Unlock()
+	data := &state.data
 	if strings.HasPrefix(r.URL.Path, "/api/") {
-		state.requests++
+		data.requests++
 		if r.Header.Get("Authorization") != "token fixture-token" {
-			state.t.Errorf("authorization = %q", r.Header.Get("Authorization"))
+			data.t.Errorf("authorization = %q", r.Header.Get("Authorization"))
 		}
 	}
-	switch r.URL.Path {
-	case "/api/v1/repos/owner/example/tags/v1.2.3":
-		_, _ = fmt.Fprintf(w, `{"name":"v1.2.3","commit":{"sha":%q}}`, state.commit)
-	case "/api/v1/repos/owner/example/releases/tags/v1.2.3":
-		if !state.page {
+	switch r.URL.EscapedPath() {
+	case "/api/v1/repos/owner/example/tags/" + url.PathEscape(data.tag):
+		_, _ = fmt.Fprintf(w, `{"name":%q,"commit":{"sha":%q}}`, data.tag, data.commit)
+	case "/api/v1/repos/owner/example/releases/tags/" + url.PathEscape(data.tag):
+		if !data.pages[data.tag] {
 			http.NotFound(w, r)
 			return
 		}
@@ -512,20 +663,20 @@ func (state *facadeDeliveryServer) serveHTTP(w http.ResponseWriter, r *http.Requ
 			Body   string `json:"body"`
 		}
 		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-			state.t.Errorf("decode release payload: %v", err)
+			data.t.Errorf("decode release payload: %v", err)
 			http.Error(w, "invalid payload", http.StatusBadRequest)
 			return
 		}
-		if payload.Tag != "v1.2.3" || payload.Target != state.commit || payload.Name != "Fixture v1.2.3" {
-			state.t.Errorf("release payload = %#v", payload)
+		if payload.Tag != data.tag || payload.Target != data.commit || payload.Name != "Fixture "+data.version {
+			data.t.Errorf("release payload = %#v", payload)
 		}
-		state.page = true
+		data.pages[data.tag] = true
 		state.writeRelease(w)
 	case "/api/v1/repos/owner/example/releases/10/assets":
 		if r.Method == http.MethodGet {
-			list := make([]map[string]any, 0, len(state.assets))
-			for name, content := range state.assets {
-				list = append(list, map[string]any{"id": len(list) + 1, "name": name, "size": len(content), "browser_download_url": state.url + "/files/" + name})
+			list := make([]map[string]any, 0, len(data.assets))
+			for name, content := range data.assets {
+				list = append(list, map[string]any{"id": len(list) + 1, "name": name, "size": len(content), "browser_download_url": data.url + "/files/" + name})
 			}
 			_ = json.NewEncoder(w).Encode(list)
 			return
@@ -533,22 +684,22 @@ func (state *facadeDeliveryServer) serveHTTP(w http.ResponseWriter, r *http.Requ
 		name := r.URL.Query().Get("name")
 		file, _, err := r.FormFile("attachment")
 		if err != nil {
-			state.t.Errorf("read upload %q: %v", name, err)
+			data.t.Errorf("read upload %q: %v", name, err)
 			http.Error(w, "invalid multipart upload", http.StatusBadRequest)
 			return
 		}
 		content, err := io.ReadAll(file)
 		_ = file.Close()
 		if err != nil {
-			state.t.Errorf("read upload %q: %v", name, err)
+			data.t.Errorf("read upload %q: %v", name, err)
 		}
-		state.assets[name] = content
+		data.assets[name] = content
 		w.WriteHeader(http.StatusCreated)
-		_ = json.NewEncoder(w).Encode(map[string]any{"id": len(state.assets), "name": name, "size": len(content)})
+		_ = json.NewEncoder(w).Encode(map[string]any{"id": len(data.assets), "name": name, "size": len(content)})
 	default:
 		if strings.HasPrefix(r.URL.Path, "/files/") {
 			name := strings.TrimPrefix(r.URL.Path, "/files/")
-			content, ok := state.assets[name]
+			content, ok := data.assets[name]
 			if !ok {
 				http.NotFound(w, r)
 				return
@@ -556,17 +707,19 @@ func (state *facadeDeliveryServer) serveHTTP(w http.ResponseWriter, r *http.Requ
 			_, _ = w.Write(content)
 			return
 		}
-		state.t.Errorf("unexpected delivery request %s %s", r.Method, r.URL)
+		data.t.Errorf("unexpected delivery request %s %s", r.Method, r.URL)
 		http.NotFound(w, r)
 	}
 }
 
 func (state *facadeDeliveryServer) writeRelease(w http.ResponseWriter) {
+	// The request handler holds state.mu.
+	data := &state.data
 	w.Header().Set("Content-Type", "application/json")
 	_ = json.NewEncoder(w).Encode(map[string]any{
-		"id": 10, "html_url": state.url + "/releases/10", "tag_name": "v1.2.3",
-		"target_commitish": state.commit, "name": "Fixture v1.2.3",
-		"body": "# Fixture v1.2.3\n\nDelivery fixture.\n", "draft": false, "prerelease": false,
+		"id": 10, "html_url": data.url + "/releases/10", "tag_name": data.tag,
+		"target_commitish": data.commit, "name": "Fixture " + data.version,
+		"body": data.noteBody, "draft": false, "prerelease": false,
 	})
 }
 

docs/adr/0005-module-release-scope.md

@@ -0,0 +1,111 @@
+# ADR 0005: Select a Go module as the unit of release
+
+## Status
+
+Accepted.
+
+## Date
+
+2026-10-09
+
+## Context
+
+A Go repository can contain independently versioned modules. CommandKit plans
+to release its core and optional integrations from one repository. Each module
+needs its own validation, release note, semantic version, and Git tag.
+
+ReleaseKit currently couples the semantic version to the Git tag and uses the
+repository directory for Go validation and release-note discovery. Supporting
+independent modules through consumer-owned publication code would duplicate
+ReleaseKit's responsibilities.
+
+[ADR 0002](0002-routine-releases.md) prioritizes routine releases with little
+application-owned code or recurring decision-making.
+[ADR 0003](0003-declarative-validation.md) establishes shared declarative
+validation. Module selection should give those checks a coherent release scope.
+
+## Decision
+
+Each check or publication invocation selects one Go module within a Git
+repository. Omitted module selection means the repository-root module. The
+public Go API and CLI/profile interface express the same selection. Consumers
+can use small per-module profiles through a shared launcher.
+
+ReleaseKit distinguishes the repository directory, selected module directory,
+semantic version, and complete Git tag. It derives the tag using Go's module
+tag conventions and the selected module's committed declaration. Derivation
+accounts for major-version directories. For example, a module in
+`integrations/ckconfig` at `v0.2.0` uses the tag
+`integrations/ckconfig/v0.2.0`. A module declared with a `/v2` suffix and stored
+in `integrations/ckconfig/v2` uses `integrations/ckconfig/v2.0.0` for `v2.0.0`.
+
+The semantic version identifies the module release. The complete tag identifies
+its source in the shared repository and governs uniqueness, tag creation,
+publication, source links, and recovery. Candidate evidence, publication
+results, and CLI output identify the selected module and both version and tag,
+alongside the existing commit and publication evidence. Failure outcomes retain
+the resolved identity for recovery.
+
+Release notes belong at `<module-directory>/docs/releases/<version>.md` and
+identify the product and semantic version in their title. ReleaseKit reads the
+selected note from the captured candidate. Root-module releases retain the
+existing note layout and unprefixed tags. Modules can publish equal semantic
+versions through their distinct notes and tags.
+
+Mandatory and optional release validation share the selected module's scope.
+Go tests, selected vet, and package compilation execute in that module with
+the existing offline environment. File checks inspect the module's committed
+contents and relevant release materials. Independently released nested modules
+are excluded from their parent's validation scope. Selecting the root module
+follows the same rule.
+
+A check may inspect referenced material outside the selected module when needed
+to validate an in-scope item. Resolving a Markdown link to shared repository
+documentation does not add that destination's documents to the validation input
+set. The checkout remains the boundary for checks of outside-checkout links.
+Shared release materials follow established conventions and documented
+consumer requirements.
+
+Product-specific checks receive the selected module context and repository
+context for deliberate composition checks. ReleaseKit applies module selection
+consistently across its shared checks, avoiding separate scope settings for
+each check.
+
+Publication guards cover the shared repository: cleanliness, branch, candidate
+commit, authoritative endpoint, and the complete selected tag. The standard
+suite runs once for the selected candidate and module. Successful source-tag
+publication remains the completion point, with existing failure and uncertain
+publication outcomes preserved. Consumers prepare released sibling dependencies
+and choose their publication order.
+
+## Alternatives considered
+
+- Consumer-owned module publication gives each application responsibility for
+  tag conventions, validation, and recovery, duplicating shared mechanics.
+- Module-local Go execution with repository-wide optional validation lets
+  unrelated modules block a selected release and gives checks inconsistent
+  scopes.
+- Independent scope settings for each check require consumers to coordinate
+  multiple declarations of the same release boundary.
+- Coordinated multi-module publication adds release-set and dependency-ordering
+  responsibilities beyond the demonstrated need for individual releases.
+
+## Consequences
+
+Consumers describe the module and product being released while ReleaseKit owns
+the common procedure. Existing single-module repositories retain their default
+behavior. Root modules containing independently released nested modules gain
+module-scoped validation; release notes and migration guidance must explain
+that change.
+
+The shared candidate and publication paths must carry module scope and separate
+version and tag identity throughout validation, diagnostics, and recovery.
+Verification must cover root defaults, nested-module failures, equal versions
+across modules, major-version directories, validation boundaries, and exact-tag
+publication outcomes.
+
+GoDoc and consumer documentation will own exact API and scope contracts.
+Configuration and CLI documentation will own profile fields, commands, and
+output. Implementation planning will define interactions with artifact builds
+and hosted delivery. ReleaseKit's maintainer release policy continues to govern
+ReleaseKit's own releases; consumers document their adopted module conventions.

docs/cli.md

@@ -21,9 +21,10 @@ go run ./cmd/releasekit check [--repo DIR] [--config FILE] VERSION
 ```
 
 `VERSION` must use stable `vMAJOR.MINOR.PATCH` syntax. Options must precede the
-version. The repository defaults to the current directory, and the profile
-defaults to `<repository>/releasekit.json`. A successful command prints the
-captured local commit and version. It checks the committed release note and
+version. The repository argument defaults to the current directory. ReleaseKit
+resolves its containing Git checkout root before selecting the module or profile;
+the profile defaults to `<repository-root>/releasekit.json`. A successful command prints the
+captured module, version, full tag, and commit. It checks the committed release note and
 local Git state, runs the standard offline Go test suite (with `-race` when
 `validation.go.race` is true), and runs a separate `go vet -mod=readonly ./...`
 pass after successful tests when `validation.go.full_vet` is true. It then runs
@@ -31,17 +32,28 @@ selected package compilation and committed Go formatting, followed by
 configured additional checks in profile order. It does not inspect remote
 availability or publish a tag.
 
+The profile's optional `module_dir` selects a repository-relative physical
+module directory; omission selects the root module. Validation and configured
+product checks use that module selection. Additional check commands run with
+the selected module as their working directory and receive
+`RELEASEKIT_VERSION`, `RELEASEKIT_CANDIDATE`, `RELEASEKIT_REPOSITORY_DIR`,
+`RELEASEKIT_MODULE_DIR`, `RELEASEKIT_MODULE_PATH`, and `RELEASEKIT_TAG` in their
+environment. These values are added to each child environment without changing
+the ReleaseKit process environment.
+
 When `validation.go.compile_targets` is selected, `check` compiles all packages
 for each configured `GOOS/GOARCH` pair after tests and full vet, using static
 mode with cgo disabled. This check produces no artifacts and does not execute
 target binaries. Compilation failures use the `package-compile` identity and
 show the selected target. When `validation.go_format` is true, `check` examines
 regular committed Go files with the Go formatter after tests, vet, and package
-compilation. It includes vendor and nested-module source, ignores the worktree
+compilation. It uses the selected module and shared-file inputs, including
+vendored source, and ignores the worktree
 and symlink blobs, and reports unformatted paths as `go-format` without
 modifying files. When `validation.module_distribution.workspace_files` is true,
-`check` reports committed `go.work` and `go.work.sum` blobs, including nested
-and symlink entries, as `workspace-files`. This inspection is independent of
+`check` reports committed `go.work` and `go.work.sum` blobs in those inputs,
+including symlink entries, as `workspace-files`. Automatic file inputs stop at
+independent nested modules. This inspection is independent of
 `GOWORK` and ignores uncommitted files. Any artifact build selected by the
 separate `build` setting runs after shared validation and configured checks.
 When `validation.markdown` is a non-null object, `check` checks committed local
@@ -63,7 +75,7 @@ Unsupported argument sequences print usage to standard error.
 Publish a source tag:
 
 ```sh
-go run ./cmd/releasekit publish [--repo DIR] [--config FILE] VERSION
+go run ./cmd/releasekit publish [--repo DIR] [--config FILE] [--expected-module DIR] VERSION
 ```
 
 `publish` reads the same product, remote, validation, and additional-check
@@ -75,8 +87,8 @@ tests. Selected package compilation and committed Go formatting follow. The
 selected file checks then run in order: workspace files, local replacements,
 file size, and Markdown. Configured checks run afterward in profile order. It
 then creates an annotated local tag
-and pushes only its exact tag object. It prints the confirmed version,
-candidate commit, and tag object
+and pushes only its exact full tag object. It prints the confirmed semantic
+version, full tag, candidate commit, and tag object
 on success. Validation
 progress and failed publication state, including the captured publication
 endpoint for recovery, are written to standard error. A signal
@@ -95,9 +107,11 @@ go.work.sum paths as `workspace-files`. Formatting failures are reported as
 `go-format` with affected paths and preserve parser or source-inspection causes.
 
 When `validation.module_distribution.local_replacements` is true, the command
-parses committed `go.mod` declarations, including nested and vendor modules,
-after workspace-file inspection. Filesystem replacements use the
-`local-replacements` identity and include the declaration path, source line,
+parses committed `go.mod` declarations in the selected module after
+workspace-file inspection. Vendored contents remain in scope, while
+automatic inputs stop at independently released nested modules. Explicit shared
+files join the file-check inputs without expanding Go scope. Filesystem replacements use
+the `local-replacements` identity and include the declaration path, source line,
 and target; versioned replacements are permitted. Committed module symlinks are
 resolved within the candidate, regardless of `GOWORK`.
 When `validation.file_size` is a non-null object, the command checks each
@@ -112,6 +126,11 @@ It reports outside-checkout links to standard error unless boundary enforcement
 is selected; submodule contents remain out of scope. Markdown failures stop
 publication before product checks or tag creation.
 
+`--expected-module DIR` optionally checks a launcher's selected physical module
+against the profile's `module_dir` before candidate work. Both paths are
+normalized relative to the repository; the profile remains the source of module
+selection. The root selection is `.`.
+
 The optional profile field `expected_push_url` applies only to `publish`. A
 nonempty value must exactly match the effective push URL resolved by Git;
 mismatches fail during preflight before Go validation or tag creation. Git URL
@@ -135,8 +154,8 @@ go run ./cmd/releasekit build [--repo DIR] [--config FILE] [--output DIR] VERSIO
 targets with the requested version injected, checks the native `version`
 invocation, and writes binaries plus the private `.releasekit-build.json`
 receipt into `dist` by default. `--output` selects a different directory;
-relative paths are resolved from the repository. Selected artifact filenames
-are regenerated while unrelated files are preserved. A complete nonempty build
+relative paths are resolved from the selected module directory. Selected
+artifact filenames are regenerated while unrelated files are preserved. A complete nonempty build
 writes a receipt only after compilation and smoke checking succeed. On partial
 failure, standard error lists completed outputs and prior receipts in that
 output directory are invalidated; no new receipt is written. An
@@ -169,7 +188,9 @@ the tagged source into temporary storage, removes it when the operation ends,
 and uploads its binaries and complete `SHA256SUMS`. When `--assets DIR` is
 supplied, that directory must contain the private `.releasekit-build.json`
 receipt and matching unchanged artifacts; this keeps the caller's original
-bytes available for retries. Profiles without targets use page-only delivery
+bytes available for retries. Relative `--assets` paths use the selected module
+directory, matching `build --output`; absolute paths retain their supplied base.
+Profiles without targets use page-only delivery
 and need no receipt, binary build, or manifest. `deliver` never runs candidate
 checks or publishes a tag.
 
@@ -197,24 +218,31 @@ known missing assets are added. See the
 Prepare a tagged CI checkout and deliver it:
 
 ```sh
-releasekit ci-deliver [--repo DIR] [--config FILE] [--remote NAME] --commit OID VERSION
+releasekit ci-deliver [--repo DIR] [--config FILE] [--remote NAME] [--prepared] [--expected-module DIR] --commit OID TAG
 ```
 
-`ci-deliver` fetches `VERSION` from the selected Git remote (default `origin`),
-requires the tag's peeled commit to match the required full `--commit` object
-ID, and checks out that commit detached. It then loads the profile from the
-prepared checkout, validates delivery settings and the configured token, and
-downloads application dependencies only when the profile selects build targets.
-Binary profiles are built and delivered through the same facade path as
-`deliver`; source-only profiles skip dependency downloads and binary builds.
+`TAG` is the complete Git tag name, including any module path prefix. Its last
+path component must be a stable semantic version; other commands continue to
+take a semantic `VERSION`. By default, `ci-deliver` fetches the exact `TAG` from
+the selected Git remote (default `origin`), requires its peeled commit to match
+the required full `--commit` object ID, checks out that commit detached, then
+verifies the tag, HEAD, and clean worktree. With `--prepared`, it performs those
+checks read-only against the existing checkout and does not fetch or check out.
+In either mode, it loads the profile from the verified source. `--expected-module`
+optionally checks that the profile selects the module chosen by a launcher;
+module selection itself remains profile-owned. The command validates delivery
+settings and the configured token, then downloads application dependencies only
+when the profile selects build targets. Binary profiles are built and delivered
+through the same facade path as `deliver`; source-only profiles skip dependency
+downloads and binary builds.
 `--config` follows the existing profile path rules: relative paths are resolved
-from `--repo`, and absolute paths are used as-is. This command explicitly
-prepares and changes the selected checkout. Ordinary `deliver` continues to
-operate on already prepared source without fetching, checking out, or
-downloading dependencies.
+from `--repo`, and absolute paths are used as-is. The default mode prepares and
+changes the selected checkout; `--prepared` reuses a verified checkout.
+Ordinary `deliver` continues to operate on already prepared source without
+fetching, checking out, or downloading dependencies.
 
 In Woodpecker, pass `CI_WORKSPACE`, `CI_COMMIT_SHA`, and `CI_COMMIT_TAG` as the
-repository, expected commit, and version arguments. The CLI does not read
+repository, expected commit, and full tag arguments. The CLI does not read
 provider-specific environment variable names. Checkout and dependency
 preparation failures return status 1; usage, profile, credential, and invalid
 version errors return status 2. Final delivery uses the same statuses as

docs/config.md

@@ -1,14 +1,16 @@
 # Configuration
 
-ReleaseKit reads a JSON profile from `<repository>/releasekit.json` by default.
-The repository directory defaults to the current directory. A relative profile
-path is resolved from that repository directory; an absolute path is used as-is.
+ReleaseKit reads a JSON profile from `<repository-root>/releasekit.json` by default.
+The repository argument defaults to the current directory; the CLI resolves its
+containing Git checkout root. A relative profile path is resolved from that root;
+an absolute path is used as-is.
 
 The current profile fields are:
 
 | Field | Required | Behavior |
 | --- | --- | --- |
 | `product` | Yes | Product name used by release operations. |
+| `module_dir` | No | Repository-relative physical Go module directory with its own `go.mod`; omission selects `.` (the repository root). |
 | `remote` | No | Selected Git remote; defaults to `origin`. |
 | `expected_push_url` | No | Exact effective push URL required by `publish`; ignored by local `check`. |
 | `checks` | No | Ordered additional child commands, each with an argument vector and optional environment map. |
@@ -16,6 +18,13 @@ The current profile fields are:
 | `build` | No | Optional main package, binary name, and selected `GOOS/GOARCH` target strings. |
 | `delivery` | No | Optional Gitea `base_url`, `owner`, `repository`, and `token_env` settings for tagged-source delivery. |
 
+`module_dir` names the selected module's physical location in the repository;
+ReleaseKit reads its declared import path from that module's own `go.mod`. The
+physical directory and declared path are distinct: a declared `/v2` module can
+live either at `integrations/core` or `integrations/core/v2`, while both use the
+same full release tag. Root-only profiles can omit `module_dir` and do not need
+a module map.
+
 Each check requires a nonempty `args` array whose first element names the
 executable. Arguments are passed directly to the child process; ReleaseKit does
 not parse a shell command string. Select a shell explicitly when a check needs
@@ -28,6 +37,17 @@ target requires the package and binary name; each target is written as one
 `GOOS/GOARCH` pair. An omitted or empty target list means no binary work.
 
 The optional `validation` object selects shared checks implemented by ReleaseKit.
+`validation.shared_files` is a committed file list resolved from the repository
+root. Omission or `null` uses `COPYRIGHT`, `LICENSE`, and
+`docs/oss/attribution.md` when present for enabled file checks; `[]` selects no
+shared files. An explicit list replaces those defaults. Each explicit file must
+exist in the candidate, even when no file checks are enabled. Paths are literal,
+repository-relative files with no glob semantics and may select a file outside
+the chosen module. ReleaseKit deduplicates them with module inputs by path. This
+field does not enable any checks or expand Go test, vet, or package-compilation
+scope. Automatic file inputs stop at independent nested-module boundaries;
+vendored files remain included. Reference inspection can read destinations
+elsewhere in the captured repository without adding them to those inputs.
 `validation.go.race` enables the race detector for the single standard Go test
 suite. `validation.go.full_vet` runs a separate native `go vet` pass after that
 suite succeeds; ReleaseKit disables test-time vet for that suite to avoid
@@ -40,7 +60,8 @@ executable, or create an artifact manifest. Omitted or empty `compile_targets`
 selects no package-compilation pass. When `full_vet` is omitted or false, the
 test command keeps its existing vet behavior. These settings are independent.
 `validation.go_format` checks regular committed Go blobs with the Go formatter
-used to build ReleaseKit. It includes vendor and nested-module source, ignores
+used to build ReleaseKit. It uses the selected file inputs, including vendor and
+explicit shared files, and ignores
 symlink blobs and the worktree, and reports every selected path whose bytes
 change under formatting. It never writes formatted bytes back. Omitted or false
 disables the check. It runs after tests, selected full vet, and selected package
@@ -69,12 +90,14 @@ Anchors keep Unicode letters and numbers, underscores, and hyphens; spaces
 become hyphens, and repeated headings receive numeric suffixes.
 
 When `validation.module_distribution.workspace_files` is true, it reports
-committed blob entries whose basename is `go.work` or `go.work.sum`, including
-nested paths and symlinks. It checks candidate distribution contents regardless
+committed `go.work` and `go.work.sum` files in the selected module inputs,
+including nested paths and symlinks. It checks the captured candidate regardless
 of `GOWORK`; it does not select or change the workspace used by Go commands,
-and it does not alter existing vendor behavior. Omitted or false disables it.
-When `validation.module_distribution.local_replacements` is true, it parses all
-committed `go.mod` declarations, including vendor and nested modules, and reports
+and vendored contents remain in scope. Omitted or false disables it. When
+`validation.module_distribution.local_replacements` is true, it parses the
+selected module's committed `go.mod` declarations. Vendored contents remain in
+scope; an explicit shared-file selection can include an individual declaration
+from another module. It reports
 `replace` directives whose replacement has no version. These filesystem
 replacements include relative and absolute paths; versioned module replacements
 are permitted. Committed `go.mod` symlinks are resolved within the candidate,
@@ -109,8 +132,8 @@ check; `{}` enables it with a default of 1,000,000 bytes. A missing or null
 `limit_bytes` selects that default, zero is a valid limit, and negative limits
 are invalid.
 
-`validation.file_size.exclusions` contains literal repository-relative file or
-directory paths. Directory exclusions include committed descendants, using path
+`validation.file_size.exclusions` contains literal paths relative to the
+selected module. Directory exclusions include committed descendants, using path
 boundaries (`assets` does not exclude `assets-old`). Ordinary relative path
 normalization applies; metacharacters are literal and unmatched paths have no
 effect. The check measures regular and symlink blobs, including small binaries;
@@ -173,14 +196,21 @@ retained for retries or when build and delivery credentials need separate
 invocations. Ordinary `deliver` does not download application dependencies or
 change the checkout.
 
-`ci-deliver` uses the same profile after preparing the selected tag in the
-checkout. It checks out the tag only after its peeled commit matches the
-provider-supplied commit ID, then loads the profile and validates delivery
-settings and credentials. It runs `go mod download` only when the profile has
-selected build targets; source-only delivery does not need application
-dependencies. This preparation may access the network and may update
-`go.sum`. The command takes CI values as arguments, so profile settings remain
-independent of Woodpecker environment variable names. See the
+`ci-deliver` takes a full Git `TAG`; its final path component is the stable
+semantic version and the complete value is checked against the profile's
+derived tag. By default it fetches the selected tag, confirms its peeled commit
+matches the provider-supplied commit ID, checks it out detached, and verifies
+the tag, HEAD, and clean worktree. With `--prepared`, it performs the same
+checks against an existing checkout without fetching or checking out. It then
+loads the profile from that source and validates delivery settings and
+credentials. An optional `--expected-module` checks a launcher's module
+selection against the profile. It runs `go mod download` only when the profile
+has selected build targets; source-only delivery does not need application
+dependencies. Default preparation may access the network and may update
+`go.sum`. For binary tagged delivery, prepare and commit that module's sums
+before tagging so dependency preparation leaves the tagged checkout clean. The
+command takes CI values as arguments, so profile settings remain independent of
+Woodpecker environment variable names. See the
 [CLI contract](cli.md) for the invocation and exit statuses.
 
 This application dependency preparation is separate from bootstrapping the

docs/consumers/adoption.md

@@ -9,21 +9,26 @@ maintainers without adding imports to application or library code.
 From the consumer module's root, select the ReleaseKit version to adopt:
 
 ```sh
-go get -tool gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit@v0.2.0
+: "${RELEASEKIT_TOOL_VERSION:?Set the released ReleaseKit version to adopt}"
+go get -tool "gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit@${RELEASEKIT_TOOL_VERSION}"
 go mod tidy
 go tool releasekit version
 ```
 
-Replace `v0.2.0` with the intended release. Go records the executable package in
+Select a release that implements the API, profile, and workflow you are adopting.
+The module-release interface requires a release containing that feature;
+pre-feature versions through v0.3.0 use their corresponding historical interface.
+Go records the executable package in
 a `tool` directive and the module version in a `require` directive. The tool
 declaration retains the dependency through `go mod tidy`. Commit the resulting
 `go.mod` and `go.sum` changes. To upgrade, repeat the command with the chosen
 version and review the module changes.
 
-Go tool dependencies require Go 1.24 or later, together with a toolchain that
-satisfies the selected ReleaseKit version and its dependencies. Tools share the
-consumer's module graph: their requirements participate in dependency version
-selection and can raise the consumer module's Go minimum. See the
+The Go tool dependency feature requires Go 1.24 or later. The current ReleaseKit
+module declares a Go 1.26.0 minimum, so use Go 1.26.0 or later for the current
+release. Tool dependencies share the consumer's module graph: their requirements
+participate in dependency version selection and can raise the consumer module's
+Go minimum. See the
 [Go tool dependency reference](https://go.dev/ref/mod#go-mod-file-tool).
 
 Run `go tool releasekit` from within the consumer module to use its selected
@@ -37,7 +42,8 @@ Consumers importing the root `releasekit` API or
 required imports and select the module version:
 
 ```sh
-go get gitea.maximumdirect.net/eric/ReleaseKit@v0.2.0
+: "${RELEASEKIT_TOOL_VERSION:?Set the released ReleaseKit version to adopt}"
+go get "gitea.maximumdirect.net/eric/ReleaseKit@${RELEASEKIT_TOOL_VERSION}"
 go mod tidy
 ```
 
@@ -51,3 +57,10 @@ supports both tool and ordinary package dependencies. It builds ReleaseKit from
 the tagged consumer's module selection, so the committed module files also
 govern CI delivery and retries. Registering the CLI as a tool is sufficient for
 consumers that use ReleaseKit only for maintainer commands.
+
+Upgrade the module-selected tool and workflow together. For a tag created before
+that upgrade, retry with the workflow matching the tool recorded at that tag.
+Keep its immutable module files and tag intact. See the
+[delivery guide](delivery.md#woodpecker-tag-workflows) for tagged-source bootstrap
+and the [example's source verification](../../examples/multi-module/README.md#local-source-verification)
+for testing an unreleased checkout in a disposable consumer repository.

docs/consumers/build.md

@@ -36,19 +36,24 @@ func build(ctx context.Context) error {
 }
 ```
 
-`Build` records the repository's current `HEAD`, injects the selected stable
-version into `buildinfo.Version`, and returns the compiler identity, normalized
-targets, artifact paths, filenames, and SHA-256 digests. Names follow
+`Build` resolves `ModuleDir` and the selected module's working-tree declaration
+once, records the repository's current `HEAD`, injects the selected stable
+version into `buildinfo.Version`, and returns repository/module identity, the
+derived tag, compiler identity, normalized targets, artifact paths, filenames,
+and SHA-256 digests. It does not require a release note, unused tag, clean
+`main`, or publication. Names follow
 `<binary>-<version>-<goos>-<goarch>`; Windows targets add `.exe`. A repeated
 target pair is built once, at its first position. Local builds may use modified
 source. `SourceVerified` is true only after a complete build observes clean
 source and the same HEAD before and after compilation; binary delivery requires
 that fact. This observation is not a source snapshot or attestation guarantee.
 
-The default output directory is `<repository>/dist`; a relative `OutputDir` is
-resolved from the repository. Selected artifact filenames are regenerated. Other files in the output
-directory are left in place. A failed later build or native version check returns the binaries already
-generated in `BuildResult.Artifacts`.
+Go commands run from `ModuleDir`, so `MainPackage` is interpreted within that
+module. The default output directory is `<module>/dist`; a relative `OutputDir`
+is resolved from the module, while an absolute path is used as supplied.
+Selected artifact filenames are regenerated. Other files in the output
+directory are left in place. A failed later build or native version check
+returns the binaries already generated in `BuildResult.Artifacts`.
 
 Builds use the available compatible Go toolchain selected locally; ReleaseKit
 does not download a different toolchain automatically. It disables workspace
@@ -72,10 +77,14 @@ The [`build` command](../cli.md) reads the same build specification from the
 profile and writes a private receipt alongside its artifacts. `check` and
 `publish` run selected builds after the standard suite and any additional
 checks using temporary output outside the worktree. Candidate checks do not
-write a receipt or leave build files in the repository.
+write a receipt or leave build files in the repository. Disposable native
+version-check output also remains outside the whole repository when `TMPDIR`
+points inside the source tree.
 
 For delivery from a tagged checkout, `deliver` builds selected tagged-source
 targets into temporary storage by default. Use `--assets DIR` to deliver a
-separate build output; ReleaseKit requires its receipt and verifies the source,
-build settings, and artifact hashes before the first Gitea write. See the
+separate build output; ReleaseKit requires the current module-bound receipt and
+checks its source identity and normalized build settings. It verifies artifact
+bytes and sizes during delivery before the first Gitea write. Older receipts
+must be regenerated with the updated `build` command. See the
 [delivery consumer guide](delivery.md) for page-only delivery and retry states.

docs/consumers/check.md

@@ -21,14 +21,27 @@ if err != nil {
 fmt.Println(result.Version, result.Commit)
 ```
 
-The repository must have a clean index and worktree on `main`, and the selected
-version must be stable `vMAJOR.MINOR.PATCH`. The committed
-`docs/releases/<version>.md` note must have a first Markdown H1 containing the
-product name and exact version as complete title elements. No local tag with
-that version may already exist.
+Set `ReleaseRequest.ModuleDir` to select a nested module using a
+repository-relative physical directory; omission or `.` selects the root
+module. ReleaseKit reads that module's committed `go.mod` and returns its
+physical `ModuleDir`, declared `ModulePath`, semantic `Version`, and complete
+`Tag` in the candidate and result. A physical `/v2` directory is removed from
+the tag prefix only when the declared module path also ends in `/v2`. For
+example, both `integrations/core/v2` and `integrations/core` can declare
+`example.com/project/integrations/core/v2` and use the tag
+`integrations/core/v2.1.0`. The release note lives under the physical module at
+`<module>/docs/releases/<version>.md`.
 
-ReleaseKit runs one `go test -mod=readonly -count=1 ./...` suite with the
-available compatible local Go toolchain. Set `Validation.Go.Race` to run that
+The repository must have a clean index and worktree on `main`, and the selected
+version must be stable `vMAJOR.MINOR.PATCH`. The module-local committed
+`<module>/docs/releases/<version>.md` note must have a first Markdown H1 containing the
+product name and exact version as complete title elements. No local tag with
+the derived complete tag may already exist. Different modules may use the same
+semantic version with distinct notes and tags.
+
+ReleaseKit runs one `go test -mod=readonly -count=1 ./...` suite from the
+selected module directory with the available compatible local Go toolchain.
+Set `Validation.Go.Race` to run that
 suite with `-race`; set `Validation.Go.FullVet` to run
 `go vet -mod=readonly ./...` after successful tests, with test-time vet disabled
 for the suite. Set `Validation.Go.CompileTargets` to compile packages for each
@@ -37,28 +50,32 @@ complete target pair after tests and vet. Package compilation uses
 failures use the `package-compile` identity and include the target. The zero
 values retain the ordinary native test behavior and select no compilation.
 Set `Validation.GoFormat` to check committed regular Go files using the Go
-formatter built into ReleaseKit. It includes vendor and nested-module source,
+formatter built into ReleaseKit. It uses the selected file inputs, including
+vendor and explicit shared files, and
 ignores symlink blobs and worktree changes, and reports unformatted paths as
 `go-format` without rewriting files. Its zero value disables the check; it runs
 after tests, selected vet, and package compilation, before `AdditionalChecks`.
 
 Set `Validation.ModuleDistribution.WorkspaceFiles` to reject committed
-`go.work` and `go.work.sum` blobs, including nested and symlink entries. It
-examines the captured candidate even when `GOWORK=off`, ignores uncommitted
-files, and does not change Go test workspace selection or vendor behavior. The
-zero value disables the check; failures use `workspace-files`.
+`go.work` and `go.work.sum` files in the selected module inputs, including
+symlink entries. It examines the captured candidate even when
+`GOWORK=off`, ignores uncommitted files, and does not change Go test workspace
+selection; vendored contents remain in scope. The zero value disables the check;
+failures use `workspace-files`.
 Set `Validation.ModuleDistribution.LocalReplacements` independently to parse
-committed `go.mod` declarations throughout the candidate, including nested and
-vendor modules. It reports filesystem `replace` directives with their source
-path, line, and target as `local-replacements`; versioned replacements are
+the selected module's committed `go.mod` declarations. Vendored contents remain
+in scope; automatic inputs stop at independently released nested modules. An
+explicit shared-file selection can include another module's declaration. It reports
+filesystem `replace` directives with their source path, line, and target as
+`local-replacements`; versioned replacements are
 permitted. Committed module symlinks are resolved within the candidate. Parse
 and inspection errors retain their causes, and the rule applies even when
 `GOWORK=off`. Its zero value disables the check.
 Set `Validation.FileSize` to check each committed blob against a byte limit.
 Nil disables the check; an empty object enables the default of 1,000,000
 decimal bytes. `LimitBytes` is strict greater-than, accepts zero, and rejects
-negative values. `Exclusions` contains literal repository-relative files or
-directories; excluded directories include descendants. Symlink blobs are
+negative values. `Exclusions` contains literal files or directories relative to
+the selected module; excluded directories include descendants. Symlink blobs are
 measured by link-text bytes, and gitlinks are omitted. The check applies to the
 captured candidate and reports one oversized file with its measurement as
 `file-size`; it does not measure historical or aggregate size.
@@ -76,7 +93,25 @@ standard suite, selected vet/format/distribution checks, or Markdown navigation
 checks in `AdditionalChecks` or profile `checks`. Keep release-note rules and
 consumer-specific assertions—such as tests of maintained examples—in those
 product-owned checks.
-ReleaseKit calls `AdditionalChecks` once after shared validation when supplied.
+The `Candidate` supplies both `RepositoryDir` and `ModuleDir`, plus the declared
+`ModulePath`, semantic `Version`, and full `Tag`; use its module directory for
+module-local product checks. ReleaseKit calls `AdditionalChecks` once after
+shared validation when supplied.
+
+`ValidationSpec.SharedFiles` adds committed, repository-relative files to
+ReleaseKit's optional file checks without enabling any checks. A nil slice
+selects the optional defaults `COPYRIGHT`, `LICENSE`, and
+`docs/oss/attribution.md`, when present; a non-nil empty slice selects none.
+Explicit files replace those defaults, must exist even when file checks are
+disabled, and may be in another module. Combined inputs are deduplicated by
+repository-relative path.
+
+Automatic file inputs stop at independent nested-module boundaries, including
+fixture modules. Vendored files remain included. Shared selection affects file
+inputs only; Go validation retains the selected module's scope. Reference reads
+can inspect destinations elsewhere in the captured repository without adding
+those destinations to the input set.
+
 It does not download a different toolchain automatically. If race prerequisites
 are unavailable, the `go-test` check fails rather than being skipped; a selected
 full-vet failure is reported as `go-vet`. The suite uses the Go host target,
@@ -97,10 +132,11 @@ commands from `releasekit.json`.
 ## Publishing the source tag
 
 `releasekit.Publish` uses the same request and validation order: the standard
-suite runs first, followed by `AdditionalChecks` when supplied. It then performs
-authoritative remote checks, annotated-tag creation, and an exact tag push. The
+suite runs first, followed by `AdditionalChecks` when supplied. It surrounds
+validation with authoritative remote guards before annotated-tag creation and
+an exact tag push. The
 selected remote must publish `main` at the captured commit and must not already
-contain the selected version tag. A successful result includes the endpoint and
+contain the selected complete tag. A successful result includes the endpoint and
 tag object ID. Publication states distinguish an unattempted push, a tag that
 was created locally but not pushed, a successful push, a guard conflict, and an
 unresolved push error. See the [publication guide](publish.md) for the complete

docs/consumers/delivery.md

@@ -7,6 +7,13 @@ The operation accepts historical lightweight and annotated tags, including a
 detached checkout, when the checked-out `HEAD` identifies the selected tag
 commit. It does not require the old remote `main` to match.
 
+Delivery resolves the selected module's declaration and release note from the
+captured commit. `Version` remains the semantic version; the full tag includes
+the selected module's repository-relative physical path when it is nested. The
+profile or API request selects the physical module directory. The optional API
+`ExpectedTag` checks that a CI event's literal tag agrees with the derived tag
+before any build or hosted request.
+
 ## CI preparation
 
 Use `PrepareTaggedCheckout` when a disposable CI checkout must be verified
@@ -20,7 +27,7 @@ or hosted content.
 ```go
 err := releasekit.PrepareTaggedCheckout(ctx, releasekit.TaggedCheckoutRequest{
     RepositoryDir:  repositoryDir,
-    Version:        version,
+    Tag:            "integrations/example/v1.2.3",
     ExpectedCommit: ciCommit,
 })
 if err != nil {
@@ -28,16 +35,25 @@ if err != nil {
 }
 ```
 
-For binary profiles, call `PrepareBuildDependencies(ctx, repositoryDir)` after
-checkout preparation and before delivery. It runs `go mod download` with
-workspace discovery disabled and the available compatible local Go toolchain.
+For binary profiles, call `PrepareBuildDependencies` with a
+`DependencyPreparationRequest` selecting the repository and module after
+checkout preparation and before delivery. It runs `go mod download` in that
+module with workspace discovery disabled and the available compatible local Go
+toolchain.
 The operation may use the network and updates the Go module cache while
 preserving the caller's proxy, private-module, credential, and cache settings.
-If checksums are missing, Go may update `go.sum`; see the
+If checksums are missing, Go may update `go.sum`. For binary CI delivery, prepare
+and commit the selected module's `go.sum` before tagging: delivery verifies the
+tagged source remains clean after dependency preparation. See the
 [Go Modules Reference](https://go.dev/ref/mod#go-mod-download). Cancellation
 and command errors are returned. Page-only profiles do not need dependency
 preparation.
 
+Set `TaggedCheckoutRequest.VerifyOnly` when a bootstrap step already fetched and
+detached the event tag. This mode checks the exact tag, expected commit, `HEAD`,
+and clean worktree without fetching or changing the checkout. Both modes require
+the full `Tag` and expected commit.
+
 ## Command line
 
 Add a Gitea destination to the profile:
@@ -66,9 +82,14 @@ The CLI reads the named token variable only for `deliver`; its default name is
 creating or accepting a hosted release page. The full checked-in note is the
 hosted body. A retry accepts an identical page and matching attachments, adds
 only missing assets, and reports conflicts without replacing content.
+For nested modules, the note comes from that module's committed
+`docs/releases/<version>.md`, and the hosted page is keyed by its complete tag.
 
 With no build targets, delivery is page-only: no builder, version smoke check,
-receipt, binary asset, or checksum manifest is involved. With selected targets,
+receipt, binary asset, or checksum manifest is involved. Committed module
+directories and declaration links can be resolved from a sparse checkout;
+page-only delivery needs the committed objects and note. Managed builds require
+the selected source files to be materialized. With selected targets,
 one `deliver` invocation builds the tagged source through the facade into
 temporary storage and delivers the result. To retain artifacts for a retry or
 separate credentials between build and delivery, use two invocations:
@@ -80,10 +101,13 @@ RELEASEKIT_GITEA_TOKEN="$GITEA_TOKEN" releasekit deliver --assets dist v1.2.3
 
 The build command does not need delivery credentials. The `--assets DIR`
 directory must contain the private `.releasekit-build.json` receipt created by
-`build`. ReleaseKit checks the receipt's repository, commit, version, resolved
-build settings, and file hashes before making a remote request; caller-owned
-files remain available for retries. Ordinary `deliver` does not download
-application dependencies or change the checkout.
+`build`. ReleaseKit checks its schema, repository, commit, version, resolved
+module directory and path, full tag, normalized build settings, and artifact
+declarations. Old receipts must be regenerated with the updated `build`
+command. Delivery verifies the artifact bytes and sizes before making a hosted
+request; caller-owned files remain available for retries.
+Ordinary `deliver` does not download application dependencies or change the
+checkout.
 
 The result reports `complete`, `partial`, `conflict`, `unknown`, or
 `not_attempted`, along with matching, uploaded, pending, conflicting, and
@@ -110,19 +134,23 @@ outside the checkout and removed when delivery returns. `Output` receives build
 progress. With no build, or with an empty target set, delivery is page-only.
 
 To deliver binaries built separately, set `Prebuilt` to the `BuildResult`.
-ReleaseKit checks that it identifies the selected repository, tagged commit, and
-version, that its source was verified clean and unchanged during compilation,
-and that the current files still match their recorded digests. The files remain
-caller-owned, so callers can retain the original bytes for retries and are
-responsible for cleanup. With neither artifact source, an empty managed target
-set, or an empty prebuilt result, delivery is page-only. Do not set both `Build`
-and `Prebuilt` in one request.
+ReleaseKit checks its repository, module directory, declared module path, full
+tag, semantic version, tagged commit, normalized settings, and artifact evidence
+against the selected committed module. Binary results must record verified
+source. The current files are checked against their recorded digests before any
+hosted request. The files remain caller-owned, so callers can retain the
+original bytes for retries and are responsible for cleanup. With neither
+artifact source, an empty managed target set, or a matching empty prebuilt
+result, delivery is page-only. Do not set both `Build` and `Prebuilt` in one
+request.
 
 ```go
 result, err := releasekit.Deliver(ctx, releasekit.DeliveryRequest{
     RepositoryDir: "/work/example",
+    ModuleDir:     "integrations/example",
     Product:       "Example",
     Version:       "v1.2.3",
+    ExpectedTag:   "integrations/example/v1.2.3", // optional CI event check
     Destination: releasekit.GiteaDestination{
         BaseURL:    "https://gitea.example",
         Owner:      "example",
@@ -157,6 +185,11 @@ a different toolchain. The tag's `go.mod` must select ReleaseKit as a module
 dependency. For CLI-only consumers, use the versioned Go tool dependency
 described in the [adoption guide](adoption.md). Ordinary package dependencies
 also work with this template.
+
+Select a tool release implementing this workflow's interface before adopting it;
+the [adoption guide](adoption.md#ci-adoption) owns coordinated tool/workflow
+upgrades. Retries of older tags use the workflow matching their recorded tool.
+
 Configure the Woodpecker repository secret `releasekit_gitea_token`; the
 template maps it to `RELEASEKIT_GITEA_TOKEN` for delivery. The repository needs
 a `delivery` profile. Page-only and binary behavior both use this template; the
@@ -175,13 +208,26 @@ invokes that executable with `CI_WORKSPACE`, `CI_COMMIT_SHA`, and
 
 Tool bootstrap and application artifact preparation are separate. The bootstrap
 resolves and builds ReleaseKit from the tagged consumer's module configuration.
-Afterward, `ci-deliver` loads the profile and downloads application dependencies
-only when build targets are selected; it builds and delivers those targets with
-the note page. Source-only profiles skip application dependency downloads and
-binary work. Dependency preparation for binaries may use the network and may
-update an uncommitted checksum file in the checkout. A retry still uses the
-same immutable tag and that tag's module settings, even after the default branch
-selects a newer ReleaseKit version.
+After the workflow verifies and checks out the event tag, the resulting CLI uses
+`ci-deliver --prepared` to repeat the tag, commit, HEAD, and cleanliness checks
+without another fetch or checkout. It loads the tagged profile and downloads
+application dependencies only when build targets are selected; it builds and
+delivers those targets with the note page. Source-only profiles skip application
+dependency downloads and binary work. Dependency preparation for binaries may
+use the network. Prepare and commit the selected module's `go.sum` before
+tagging; an uncommitted change makes the later delivery source check fail. A
+retry still uses the same immutable tag and that tag's module settings, even
+after the default branch selects a newer ReleaseKit version.
+
+The root-only [`tag-delivery.yml`](../../examples/woodpecker/tag-delivery.yml)
+keeps the small default profile and root-module bootstrap. For consumers that
+release several modules from one repository, copy the contents of the maintained
+[multi-module example](../../examples/multi-module/) to the consumer repository
+root and use its [`woodpecker.yml`](../../examples/multi-module/woodpecker.yml),
+[`release-modules.tsv`](../../examples/multi-module/release-modules.tsv), and
+shared selector. The event tag chooses one row from the tagged checkout; the
+profile and physical module must agree, and ReleaseKit verifies the derived tag.
+The example covers source-only integration pages and a binary core module.
 
 If the application does not declare ReleaseKit as a module dependency, install
 the executable separately and invoke the same `ci-deliver` command. For

docs/consumers/publish.md

@@ -6,6 +6,7 @@ annotated source tag:
 ```go
 result, err := releasekit.Publish(ctx, releasekit.ReleaseRequest{
 	RepositoryDir:   "/work/project",
+	ModuleDir:       "integrations/example",
 	Product:         "Example",
 	Version:         "v1.2.3",
 	ExpectedPushURL: "ssh://git.example/owner/example.git",
@@ -13,15 +14,28 @@ result, err := releasekit.Publish(ctx, releasekit.ReleaseRequest{
 		Go: releasekit.GoValidationSpec{Race: true, FullVet: true},
 	},
 	AdditionalChecks: func(ctx context.Context, candidate releasekit.Candidate) error {
-		return runProjectChecks(ctx, candidate.RepositoryDir)
+		return runProjectChecks(ctx, candidate.ModuleDir)
 	},
 })
 if err != nil {
 	return err
 }
-fmt.Println(result.Version, result.CandidateCommit, result.TagObject)
+fmt.Println(result.ModulePath, result.Version, result.Tag, result.CandidateCommit, result.TagObject)
 ```
 
+`ModuleDir` is a repository-relative physical module directory; omit it or use
+`.` for a root-module release. ReleaseKit reads the selected module's committed
+declaration and derives the complete Git tag from its declared module path and
+physical location. `Version` remains the stable semantic version. The note is
+`<module>/docs/releases/<version>.md`; an on-disk `/v2` directory is part of
+the note path but is removed from the tag prefix only when the module path ends
+in `/v2`. `PublicationResult` returns the absolute `ModuleDir`, declared
+`ModulePath`, complete `Tag`, and existing commit and tag-object evidence.
+
+The optional `ValidationSpec.SharedFiles` selects additional committed files
+for enabled file checks. Its nil and empty-slice behavior is described in the
+[candidate check guide](check.md#local-candidate-check).
+
 Publication captures a clean candidate on `main`, validates its committed
 release note, and checks the selected remote before running candidate checks.
 Set `ExpectedPushURL` to require the effective push destination to match an
@@ -49,22 +63,25 @@ does not execute target binaries. A failure is reported as `package-compile`
 with the selected target and prevents tag creation.
 
 Set `Validation.GoFormat` to check committed regular Go source using the Go
-formatter built into ReleaseKit. It includes vendor and nested modules, ignores
+formatter built into ReleaseKit. It uses the selected file inputs, including
+vendor and explicit shared files, and ignores
 worktree changes and symlink blobs, and reports unformatted paths as
 `go-format` without changing files. The default is disabled. The check follows
 tests, selected vet, and package compilation, and a failure stops publication
 before product checks or tag creation.
 
 Set `Validation.ModuleDistribution.WorkspaceFiles` to reject committed
-`go.work` and `go.work.sum` blobs, including nested paths and symlink entries.
+`go.work` and `go.work.sum` blobs in the selected inputs, including symlink entries.
 The rule reads the captured candidate regardless of `GOWORK`; uncommitted files
 are ignored, and Go workspace selection and vendor behavior are unchanged. Its
 zero value disables the check. Findings use `workspace-files` and stop
 publication before product checks or tag creation.
 Set `Validation.ModuleDistribution.LocalReplacements` independently to parse
-committed `go.mod` declarations across the candidate, including nested and
-vendor modules. Filesystem `replace` directives are reported with their source
-path, line, and target as `local-replacements`; versioned replacements are
+selected module's committed `go.mod` declarations. Vendored contents remain in
+scope; automatic inputs stop at independently released nested modules. Explicit
+shared files can include another module's declaration. Filesystem
+`replace` directives are reported with their source path, line, and target as
+`local-replacements`; versioned replacements are
 permitted. Committed module symlinks are resolved within the candidate, and
 parse or inspection errors retain their causes. This check is independent of
 `GOWORK`; its zero value disables it, and a failure stops publication before
@@ -72,9 +89,9 @@ product checks or tag creation.
 Set `Validation.FileSize` to check each committed blob against a byte limit.
 Nil disables the check; an empty object enables the default of 1,000,000
 decimal bytes. `LimitBytes` uses strict greater-than, accepts zero, and rejects
-negative values. `Exclusions` contains literal repository-relative files or
-directories, including committed descendants of excluded directories. Symlink
-blob size is its link text; gitlinks are omitted. This check measures only the
+negative values. `Exclusions` contains literal files or directories relative to
+the selected module, including committed descendants of excluded directories.
+Symlink blob size is its link text; gitlinks are omitted. This check measures only the
 captured candidate and reports one oversized file with its measurement as
 `file-size`; it stops publication before product checks or tag creation.
 

docs/integrations/gitea.md

@@ -1,7 +1,7 @@
 # Gitea release pages
 
 ReleaseKit's public `Deliver` operation and `deliver` command verify tagged
-source, find or create its stable release page, inspect existing assets, and
+source, find or create the selected module's release page, inspect existing assets, and
 upload missing assets through the internal Gitea client. Page-only and
 binary-producing profiles use the same delivery path. The
 [consumer delivery guide](../consumers/delivery.md) covers caller workflows;
@@ -13,16 +13,30 @@ the `Authorization: token …` request header and is not included in errors or
 results. The base URL must use HTTP or HTTPS and cannot contain URL credentials,
 a query, or a fragment.
 
-For version `vMAJOR.MINOR.PATCH`, the client first reads
+The selected module derives a complete tag from its semantic version, declared
+module path, and physical repository-relative directory. For example, version
+`v1.2.3` in `integrations/ckconfig` uses
+`integrations/ckconfig/v1.2.3`; a root module uses `v1.2.3`. A `/v2` module
+stored at `integrations/core/v2` uses `integrations/core/v2.1.0`; the same
+declared module stored at `integrations/core` derives the same tag. ReleaseKit
+removes a final physical `/v2` directory from the tag prefix only when the
+module declaration has that `/v2` suffix. A module-local note stays at
+`<module>/docs/releases/<version>.md`, including a physical `/v2` directory.
+The default shared validation convention uses repository-root `COPYRIGHT`,
+`LICENSE`, and `docs/oss/attribution.md` when present. Consumers own their license
+layout and release-note links. Use the complete derived tag as the immutable
+source ref and the actual repository-relative file paths in those links.
+Shared-file selection controls validation inputs; delivery preserves the
+committed note and its footer links. The client first reads
 `/api/v1/repos/{owner}/{repo}/tags/{tag}` and requires the hosted tag's commit
 SHA to equal the captured source commit. It then reads
 `/api/v1/repos/{owner}/{repo}/releases/tags/{tag}`. A matching existing page
 must have that tag, the complete committed release note as its body, and stable
 non-draft state. Its existing title is retained. ReleaseKit does not edit a
-conflicting page.
+conflicting page. Slash-containing tags are escaped as one URL path segment.
 
 If the page is absent, the client posts to `/api/v1/repos/{owner}/{repo}/releases`
-with the selected tag and commit, the release note's H1 as title, the complete
+with the selected full tag and commit, the release note's H1 as title, the complete
 note as body, and draft and prerelease disabled. A create conflict, interrupted
 response, or malformed create response (including inconsistent decoded fields)
 triggers one lookup. An exact page found

docs/internal/gotool.md

@@ -1,7 +1,10 @@
 # Go command environments
 
-`internal/gotool` resolves effective Go settings once for a validation or build
-operation and applies the shared environment to its Go commands. It uses
+`internal/gotool` resolves effective Go settings when an operation first needs
+a Go command and applies the shared environment to its commands. Candidate
+validation and its build callback share an operation-local owner while the
+inherited environment and persistent Go settings file remain unchanged.
+Standalone and delivery builds create their own owners. The package uses
 `internal/process` for cancellation, the working directory, output, and wrapped
 errors.
 
@@ -35,9 +38,10 @@ uses the same ownership transfer when formatting a failure.
 
 ## Configuration discovery
 
-The owner asks the installed `go` command for `GOHOSTOS` and `GOHOSTARCH`, then
-queries effective operational settings with that host selected. Both queries
-use `GOTOOLCHAIN=local` and controlled `GOFLAGS`. Discovery sets
+The owner asks the installed `go` command for `GOHOSTOS`, `GOHOSTARCH`, and the
+`GOENV` settings-file path, then queries effective operational settings with
+that host selected. Both queries use `GOTOOLCHAIN=local` and controlled
+`GOFLAGS`. Discovery sets
 `GOEXPERIMENT=none` and clears architecture feature variables so an invalid or
 nonbaseline tuning value cannot prevent settings from being read. The
 experiment override is discovery-only.
@@ -48,6 +52,13 @@ and native cgo/C-tool configuration into its settings. This captures values
 supplied by either the process environment or the persistent Go environment
 file.
 
+The operation-local owner snapshots the inherited environment and selected
+settings file. It reuses the resolved tool across validation and its following
+build callback while those inputs match. Subsequent Go acquisition rediscovers
+settings when a consumer callback changes either input. An unavailable snapshot
+disables reuse while discovery follows the Go tool's accepted configuration.
+Ownership is operation-local.
+
 Configuration discovery parses JSON from stdout. Stderr is captured separately
 and included in command-failure diagnostics, so a successful query can emit
 warnings while supplying valid configuration.
@@ -69,9 +80,10 @@ baseline values. Effective `GOCACHE`, `GOCACHEPROG`, `GOMODCACHE`, `GOPATH`,
 `GOROOT`, and `GOTMPDIR` values are retained. Other process variables remain
 available to child commands.
 
-Candidate validation uses native mode for the offline `go test` suite and
-selected full `go vet` pass. Package-compilation checks use static mode for each
-selected target and direct Go's output to the operating system null device, so
-they leave no binary artifact. Artifact builds also use static mode for
-selected-target compilation, then build the native version-check executable;
-that executable runs as a normal child process.
+Candidate validation runs the offline `go test` suite and selected full
+`go vet` pass from the selected module directory using native mode.
+Package-compilation checks use static mode for each selected target and direct
+Go's output to the operating system null device, so they leave no binary
+artifact. Artifact builds also compile selected targets in static mode, then
+build the native version-check executable, which runs as a normal child
+process.

docs/internal/overview.md

@@ -25,7 +25,7 @@ Go declarations and GoDoc remain the owners of exact exported contracts.
 ## Module and dependencies
 
 The module is `gitea.maximumdirect.net/eric/ReleaseKit`, with Go language
-version `1.25.0`. `go.mod` requires `golang.org/x/mod` and Goldmark for internal
+version `1.26.0`. `go.mod` requires `golang.org/x/mod` and Goldmark for internal
 validation; public facades do not expose either dependency. `go list ./...`
 reports these implemented packages:
 
@@ -37,15 +37,16 @@ reports these implemented packages:
 | `cmd/releasekit/internal/cli` | Command parsing, strict JSON profile loading, configured checks, and private build receipts. |
 | `internal/apicheck` | Compiled-export and import-boundary checks run during development. |
 | `internal/artifact` | Shared build-target normalization, artifact declarations, filename rules, and checksum-manifest naming. |
-| `internal/build` | Candidate-build coordination, selected Go target compilation, version injection, native smoke check, and artifact digests. |
+| `internal/build` | Resolved-identity builds, normalized settings, selected-module compilation, version injection, external native smoke output, and artifact digests. |
 | `internal/candidate` | Stable-version, note, repository-state, candidate capture, and post-validation checks. |
-| `internal/delivery` | Tagged-source and release-note checks, managed builds in disposable storage outside the checkout, structural artifact declaration, manifest assembly, one local digest-and-size preflight before hosted requests, and delivery coordination. |
-| `internal/git` | Git command boundary, committed-tree reads, lazy local-only batched blob reads, push-destination resolution, exact ref inspection, tagged checkout preparation, and tag operations, including captured-endpoint verification during recovery. |
-| `internal/gitea` | Gitea API transport, hosted release pages, asset inspection, manifests, and uploads. |
-| `internal/gotool` | Effective Go configuration discovery, shared native-validation and static-build environments, and network-capable dependency preparation; see [Go command environments](gotool.md). |
+| `internal/delivery` | Captured-commit module identity and note selection, literal-tag checkout checks, prebuilt identity binding, managed builds in disposable storage outside the checkout, structural artifact declaration, manifest assembly, one local digest-and-size preflight before hosted requests, and delivery coordination. |
+| `internal/git` | Git command boundary, committed-tree reads and shared reference traversal, checkout-root and commit capture, lazy local-only batched blob reads, push-destination resolution, exact ref inspection, tagged checkout preparation, and tag operations, including captured-endpoint verification during recovery. |
+| `internal/gitea` | Gitea API transport, full-tag hosted release pages, asset inspection, manifests, and uploads. |
+| `internal/gotool` | Operation-local Go configuration discovery and reuse, shared native-validation and static-build environments, and network-capable dependency preparation; see [Go command environments](gotool.md). |
 | `internal/tempdir` | Disposable system temporary storage outside source worktrees. |
 | `internal/process` | Cancellable child-process execution, including owned stdin/stdout pipes for serialized exchanges, with per-command environment overlays and removals. |
 | `internal/preparation` | Coordination for expected-commit tag checkout and Go module dependency preparation. |
+| `internal/releaseidentity` | Committed-object and working-tree module selection, declaration reading, and semantic-version-to-tag derivation. |
 | `internal/validation` | Shared Go validation with optional race, full-vet, and static package-compilation target selections, formatting, workspace-file and filesystem-replacement checks, per-blob size limits, and selected Markdown destination and fragment checking; `internal/candidate` retains capture, callback sequencing, and local-state rechecks. |
 | `internal/publish` | Publication guards, one validation run, annotated tag creation, push, and recovery state. |
 | `internal/runtimeinfo` | Injected version selection and cached fallback metadata lookup for the runtime facade. |
@@ -61,15 +62,24 @@ also recorded in [ADR 0001](../adr/0001-public-facade.md) and the
 
 Candidate checking captures and validates one clean committed source revision
 in `internal/candidate`. Its validation bridge calls `internal/validation` for
-the default offline Go suite, then runs product-specific checks once. The
-candidate package owns post-validation builds and local-state rechecks;
-publication owns endpoint guards, tag creation, push, and recovery around that
-same candidate validation path. `internal/validation.CandidateTree` reads
+the selected module's default offline Go suite, then runs product-specific
+checks once. Validation and its post-validation build callback share one local
+Go settings owner. Each Go acquisition checks inherited and persistent inputs;
+settings are rediscovered when subsequent Go work needs them. An unavailable
+persistent-settings snapshot disables reuse. The candidate package owns builds and local-state
+rechecks; publication owns endpoint guards, tag creation, push, and recovery
+around that same candidate validation path. `internal/validation.CandidateTree` reads
 committed blobs lazily and resolves local destinations from committed entries;
 it does not consult neighboring files or traverse submodule checkouts.
 See the [shared validation guide](validation.md) for checker, Go command, and
 candidate-file integration mechanics.
 
+Delivery verifies all local binary sizes and digests before hosted requests.
+Its Gitea upload path reuses that verification and streams missing files once
+for transport. Independent calls to the internal client's `UploadMissing`
+verify missing local files before writing. Both paths share remote inspection,
+conflict handling, and reconciliation.
+
 ## Capability owners and behavioral evidence
 
 The following tests are representative evidence from the current offline suite,
@@ -81,16 +91,17 @@ not a separate release matrix:
 | Candidate capture, shared validation, public diagnostics, additional checks, and rechecks | `releasekit.Check`, `releasekit.Publish`, `internal/candidate`, `internal/validation`, `cmd/releasekit/internal/cli` | `TestRunUsesOneSuiteWithSelectedRaceSetting`, `TestRunReportsRacePrerequisiteFailureWithoutFallback`, `TestRunExecutesRaceEnabledSuiteOnHost`, `TestRunCompilesTargetsAfterTestAndVetInSelectionOrder`, `TestRunAttributesTargetCompileFailureAndStops`, `TestRunCompilesSourceOnlyAndExecutablePackagesWithoutArtifacts`, `TestCandidateRequestMapsGoValidation`, `TestCandidateRequestPreservesMarkdownObjectSelection`, `TestLoadSettingsReadsGoValidation`, `TestLoadSettingsPreservesMarkdownObjectSelection`, `TestCheckUsesSelectedRaceSuiteBeforeAdditionalChecks`, `TestCheckCapturesCandidateAndCallsAdditionalChecksOnce`, `TestCheckReturnsPublicValidationError`, `TestMarkdownValidationRunsThroughCheckAndPublish`, `TestCheckStopsBeforeProductAndBuildCallbacksWhenMarkdownBoundaryFails`, `TestCheckCommandBindsConfiguredChecksToCapturedCandidate`, `TestPublishCommandPublishesConfiguredCandidate`, `TestCandidateCommandsPresentValidationDiagnosticsOnce`, `TestDeliverPageOnlyCreatesAndReusesRelease` |
 | Committed-file validation: formatting, workspace files, local replacements, and file size | `internal/validation`, `internal/candidate`, `releasekit.Check`, `releasekit.Publish`, CLI profile conversion | `TestCheckGoFormatUsesCapturedRegularGoBlobs`, `TestCheckWorkspaceFilesReportsCommittedBlobNames`, `TestCheckLocalReplacementsParsesCommittedModuleDeclarations`, `TestCheckLocalReplacementsFollowsCommittedModuleSymlinks`, `TestCheckFileSizeUsesStrictLimitsAndDefault`, `TestCheckFileSizeAppliesLiteralPathExclusions`, `TestCheckFileSizeUsesCommittedBlobSizes`, `TestCheckFileSizeUsesOnlyCandidateFilesIndividually` |
 | Internal Markdown parsing, committed destinations, fragments, boundary observations, and public selection | `releasekit.Check`, `releasekit.Publish`, `internal/candidate`, `internal/validation`, `cmd/releasekit/internal/cli` | `TestParseMarkdownLinksAndSourceLocations`, `TestParseMarkdownDecodesEntitiesInDestinations`, `TestParseMarkdownHeadingAnchors`, `TestMarkdownCacheKeepsParsedDocumentsPerCandidatePath`, `TestCheckMarkdownLinksResolvesCommittedDestinationsAndFragments`, `TestCheckMarkdownLinksReportsMissingPathsAnchorsAndCycles`, `TestCheckMarkdownLinksUsesResolvedMarkdownIdentity`, `TestCheckMarkdownLinksReportsBoundaryAndSubmoduleObservations`, `TestCheckMarkdownLinksPreservesResolverCauseAndCancellation`, `TestCheckMarkdownLinksPreservesAnchorReadCause`, `TestRunSelectsMarkdownWithCombinedGoChecksAndReportsOutOfScopeLinks`, `TestMarkdownValidationRunsThroughCheckAndPublish`, `TestLoadSettingsPreservesMarkdownObjectSelection`, `TestValidationSpecPreservesMarkdownObjectSelection` |
-| Shared Go settings for validation and builds | `internal/gotool`, `internal/process`, `internal/candidate`, `internal/build` | `TestDefaultValidationDoesNotInheritGOFLAGSRunFilter`, `TestNativeAndStaticCommandsUseOwnedBaseline`, `TestPersistentSettingsPreserveCachesAndNativeCTools`, `TestBuildIgnoresAmbientAndPersistentArchitectureTuning` |
+| Shared Go settings for validation and builds | `internal/gotool`, `internal/process`, `internal/candidate`, `internal/build` | `TestDefaultValidationDoesNotInheritGOFLAGSRunFilter`, `TestNativeAndStaticCommandsUseOwnedBaseline`, `TestPersistentSettingsPreserveCachesAndNativeCTools`, `TestOwnerReusesSettingsUntilInheritedEnvironmentChanges`, `TestOwnerRefreshesWhenPersistentSettingsChange`, `TestCheckSharesGoDiscoveryWithAfterValidateCallback`, `TestCheckBuildsAfterValidationAndKeepsOutputOutsideWorktree`, `TestRunValidatesOnlyTheSelectedModule`, `TestBuildIgnoresAmbientAndPersistentArchitectureTuning` |
 | Batched local Git blob reads | `internal/git`, `internal/process` | `TestBlobReaderReadsLooseAndPackedObjects`, `TestBlobReaderMissingObjectKeepsBatchSessionUsable`, `TestCandidateObjectReadsStayLocalInPartialClones` |
 | Piped child-process exchanges and cancellation cleanup | `internal/process` | `TestStartPipedExchangesBeforeInputEOFAndPreservesSettings`, `TestStartPipedCancellationAfterReadinessReapsChild`, `TestStartPipedPreservesNonzeroExit` |
 | Authoritative endpoint and exact annotated tag publication | `releasekit.Publish`, `internal/publish`, `internal/git` | `TestPublishPushesOnlyTheCapturedAnnotatedTag`, `TestPublishRejectsUnexpectedPushURLBeforeValidation`, `TestPublishComparesExpectedURLWithResolvedInsteadOfDestination`, `TestPublishExpectedPushURLUsesPushURLWhenFetchAndPushDiffer`, `TestCheckIgnoresExpectedPushURL`, `TestResolveUsesPushURLAndQueriesWithoutMutation` |
 | Publication partial and uncertain recovery | `internal/publish`, `internal/git` | `TestPublishRejectedPushKeepsLocalTagAndReportsNotPublished`, `TestPublishLostAcknowledgmentConfirmsExactRemoteObject`, `TestPublishLostAcknowledgmentWithChangedEndpointRemainsUnknown`, `TestPublishUnavailableReconciliationRemainsUnknownAndPreservesPushError` |
-| Cross-builds, version smoke checks, empty target sets, and partial outputs | `releasekit.Build`, `internal/build`, `buildinfo` | `TestBuildCreatesSelectedTargetsAndInjectsVersion`, `TestBuildWithNoTargetsDoesNotInvokeCompiler`, `TestBuildReturnsPartialArtifactsAfterTargetFailure` |
-| Page-only and managed or prebuilt binary delivery | `releasekit.Deliver`, `internal/delivery`, `internal/gitea`, CLI | `TestDeliverPageOnlySkipsBuildAndHostedAssets`, `TestDeliverManagedBuildUploadsArtifactsAndCleansTemporaryOutput`, `TestDeliverBinaryConsumerWithBuildinfoAndSelectedTargets`, `TestDeliverPrebuiltArtifactsRemainCallerOwned`, `TestDeliverRejectsSameSizePrebuiltTamperingBeforeHostedWrites`, `TestDeliverManagedBuildFailureCleansTemporaryOutputBeforeHostedWrites`, `TestDeliverManagedBuildCancellationCleansTemporaryOutput`, `TestDeliverBuildsTaggedArtifactsAndReusesAssets`, `TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites` |
-| Tagged checkout and build dependency preparation | `releasekit.PrepareTaggedCheckout`, `releasekit.PrepareBuildDependencies`, `internal/preparation`, `internal/git`, `internal/gotool` | `TestPrepareTaggedCheckoutFetchesExpectedCommitAndDetaches`, `TestPrepareTaggedCheckoutRejectsWrongCommitBeforeCheckout`, `TestPrepareTaggedCheckoutReportsLocalCheckoutConflict`, `TestPrepareTaggedCheckoutReportsConflictingLocalTag`, `TestPrepareBuildDependenciesPreservesPreparationEnvironment`, `TestPrepareBuildDependenciesPropagatesCommandFailure`, `TestPrepareBuildDependenciesPropagatesCancellation` |
+| Cross-builds, version smoke checks, module paths, empty target sets, and partial outputs | `releasekit.Build`, `internal/build`, `internal/artifact`, `internal/tempdir`, `buildinfo` | `TestBuildCreatesSelectedTargetsAndInjectsVersion`, `TestBuildUsesNestedWorkingTreeModuleAndModuleRelativeOutput`, `TestBuildResolvesDirtyWorkingTreeDeclaration`, `TestBuildWithNoTargetsDoesNotInvokeCompiler`, `TestBuildReturnsPartialArtifactsAfterTargetFailure`, `TestNormalizeSettingsKeepsBuildInputsAndNormalizesTargets`, `TestOutsideFallsBackWhenTemporaryDirectoryIsInsideWorktree` |
+| Page-only and managed or prebuilt binary delivery | `releasekit.Deliver`, `internal/delivery`, `internal/gitea`, CLI | `TestDeliverPageOnlySkipsBuildAndHostedAssets`, `TestDeliverUsesCommittedModuleIdentityForSeparatePages`, `TestDeliverRejectsPrebuiltArtifactsForAnotherModuleBeforeHostedRequests`, `TestDeliverManagedBuildUploadsArtifactsAndCleansTemporaryOutput`, `TestDeliverBinaryConsumerWithBuildinfoAndSelectedTargets`, `TestDeliverPrebuiltArtifactsRemainCallerOwned`, `TestDeliverRejectsSameSizePrebuiltTamperingBeforeHostedWrites`, `TestDeliverManagedBuildFailureCleansTemporaryOutputBeforeHostedWrites`, `TestDeliverManagedBuildCancellationCleansTemporaryOutput`, `TestDeliverBuildsTaggedArtifactsAndReusesAssets`, `TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites`, `TestEnsureReleaseEscapesSlashContainingTag` |
+| Tagged checkout and build dependency preparation | `releasekit.PrepareTaggedCheckout`, `releasekit.PrepareBuildDependencies`, `internal/preparation`, `internal/git`, `internal/gotool` | `TestPrepareTaggedCheckoutFetchesExpectedCommitAndDetaches`, `TestPrepareTaggedCheckoutRejectsWrongCommitBeforeCheckout`, `TestPrepareTaggedCheckoutReportsLocalCheckoutConflict`, `TestPrepareTaggedCheckoutReportsConflictingLocalTag`, `TestPrepareBuildDependenciesUsesSelectedModuleDirectory`, `TestPrepareBuildDependenciesPreservesPreparationEnvironment`, `TestPrepareBuildDependenciesPropagatesCommandFailure`, `TestPrepareBuildDependenciesPropagatesCancellation` |
+| Shared module identity and tag derivation | `internal/releaseidentity`, `internal/candidate`, `internal/build`, `internal/delivery` | `TestDeriveUsesModuleDeclarationAndPhysicalLayout`, `TestCommittedAndWorkingTreeDeclarationsUseTheirOwnSources`, `TestSelectedNestedModuleDoesNotRequireRootDeclaration`, `TestBuildResolvesDirtyWorkingTreeDeclaration`, `TestDeliverUsesCommittedModuleIdentityForSeparatePages` |
 | Page, manifest, asset comparison, and additive retry outcomes | `internal/gitea` | `TestEnsureReleaseCreatesMissingPageFromCommittedNote`, `TestInspectAssetsDetectsSameNameAndSizeWithDifferentBytes`, `TestUploadMissingPartialFailureThenRerunOnlyMissingAssets` |
-| CLI profiles and prepared Woodpecker sequences | `cmd/releasekit`, `cmd/releasekit/internal/cli`, `examples/woodpecker/` | `TestLoadSettingsRejectsInvalidProfiles`, `TestWoodpeckerTagDeliveryTemplate`, `TestWoodpeckerTagDeliveryUsesTaggedModuleVersion`, `TestWoodpeckerSourceDeliveryTemplateSelfBootstraps`, `TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout` |
+| CLI profiles and prepared Woodpecker sequences | `cmd/releasekit`, `cmd/releasekit/internal/cli`, `examples/woodpecker/`, `examples/multi-module/` | `TestLoadSettingsRejectsInvalidProfiles`, `TestWoodpeckerTagDeliveryTemplate`, `TestWoodpeckerTagDeliveryUsesTaggedModuleVersion`, `TestWoodpeckerSourceDeliveryTemplateSelfBootstraps`, `TestReleaseKitSourceDeliveryWorkflowFromTaggedCheckout`, `TestMultiModuleSelectorMapsSelectorsAndTags`, `TestMultiModuleLauncherUsesSelectedModuleAndProfile`, `TestMultiModuleWoodpeckerDelivery` |
 
 Run the complete suite with `go test ./...`. The public API and import boundary
 check is `go run ./internal/apicheck`. Local HTTP and Git fixtures exercise

docs/internal/validation.md

@@ -8,30 +8,49 @@ post-validation build callback and local-state recheck. `internal/publish`
 adds its endpoint guards, tag creation, push, and recovery around that same
 candidate path.
 
-The executor runs one offline Go suite, optionally with the race detector when
-selected. When full vet is selected, it disables test-time vet for that suite
-and runs native `go vet -mod=readonly ./...` after the suite succeeds. It then
-runs `go build -mod=readonly -o <os.DevNull> ./...` in static mode for each
-selected package-compilation target, preserving target order and stopping on
-the first failure. This compiles source without producing an artifact or
-executing a target binary. Test, vet, and package-compilation failures retain
-their `go-test`, `go-vet`, and `package-compile` identities, selected target
-where applicable, and underlying causes. Its
+The executor runs one offline Go suite from the captured module directory,
+optionally with the race detector when selected. When full vet is selected, it
+disables test-time vet for that suite and runs native
+`go vet -mod=readonly ./...` from the same directory after the suite succeeds.
+It then runs `go build -mod=readonly -o <os.DevNull> ./...` there in static mode
+for each selected package-compilation target, preserving target order and
+stopping on the first failure. This compiles source without producing an
+artifact or executing a target binary. Test, vet, and package-compilation
+failures retain their `go-test`, `go-vet`, and `package-compile` identities,
+selected target where applicable, and underlying causes. Its
 request carries the captured repository directory and commit, output writer,
 and internal settings. When selected, the Go-format check loads the candidate
 tree once, reads regular Go blobs from the captured commit, and compares them
-with go/format output. It includes vendor and nested-module files, skips
+with go/format output. It uses the selected inputs, including vendor and explicit
+shared files, and skips
 symlink blobs, reports all unformatted paths, and stops with a contextual cause
 on parse or inspection errors. It runs before product checks and build callbacks.
 `Request.ReadCandidateTree` lets selected file checks request candidate
 contents; the Go-only path does not enumerate the tree.
 
+## Selected validation inputs
+
+`CandidateTree` keeps the full committed repository lookup separate from the
+ordered file input set. The selected module's committed inputs
+exclude independently released nested modules, while vendored contents stay
+in scope. Selection indexes boundary directories once and checks each entry's
+ancestors, so unrelated boundaries are not scanned for each file. The
+[scope benchmark](../../internal/validation/scope_performance_test.go) varies
+boundary count while retaining 20,000 input files.
+Explicit shared-file selections are normalized from repository-root
+paths, added as individual files, and deduplicated with module inputs by path.
+File-size exclusions are normalized from the selected module directory. Link
+resolution can still inspect a committed destination outside the selected input
+set without adding that destination's content to the checks. The public
+selection, nil/empty behavior, and profile path bases belong to the
+[configuration reference](../config.md) and the root facade's GoDoc.
+
 The workspace-file check uses that same candidate inventory and reports blob
 entries named go.work or go.work.sum, including nested paths and symlink blobs.
 It does not read workspace contents or depend on the workspace selected for Go
 commands.
-The local-replacement check parses every committed go.mod blob with
-`golang.org/x/mod/modfile`, including nested modules and vendor declarations.
+The local-replacement check parses selected go.mod blobs with
+`golang.org/x/mod/modfile`, including vendor and explicitly shared declarations.
 It follows committed symlink declarations through the captured tree and fails
 with an inspection cause when their selected contents are unavailable. A
 replacement with no parsed version is reported with its go.mod path, line,
@@ -40,22 +59,24 @@ workspace-file check using the same candidate inventory. Resolved module bodies
 are parsed once per blob object ID; only owned filesystem-replacement targets
 and line numbers remain cached. Each declaration path receives findings from
 that summary in its own path context.
-The optional file-size check uses each blob's captured Git size, including
-symlink link-text bytes, and skips entries without a blob size such as gitlinks.
-It applies normalized literal file/directory exclusions with path-boundary
-matching, then returns the first oversized path with `FileSizeMeasurement`.
+The optional file-size check applies normalized literal file/directory
+exclusions with path-boundary matching, then requests local Git sizes for the
+remaining selected blobs. Sizes include symlink link-text bytes; gitlinks are
+omitted. The check returns the first oversized path with `FileSizeMeasurement`.
 The optional Markdown check follows file-size inspection and uses the same
 candidate tree. It parses regular Markdown blobs, resolves local destinations,
 and checks supported anchors; outside-checkout and submodule observations are
 written to the shared output writer. A nil writer keeps library use quiet.
-`CandidateTree` gets metadata and bytes from Git objects, reads blob bytes
-lazily, and resolves destinations without consulting the worktree or
-neighboring files. Each tree owns one lazy Git blob reader; direct tree users
-must close it when finished. The shared validation executor closes its tree on
-every return before product checks or build callbacks run. A metadata-only
-selection never starts the reader. Per-read contexts cancel an in-flight blob
-exchange. The context supplied when creating the tree governs the reader
-lifetime, including shutdown and child reaping.
+`CandidateTree` enumerates full repository path, type, mode, and object metadata
+without requiring blob contents or sizes. Checks acquire sizes and bytes for
+their selected inputs and required references. Unreferenced blobs in excluded
+modules remain outside those reads. Destinations resolve without consulting
+the worktree or neighboring files. Each tree owns one lazy Git blob reader;
+direct tree users must close it when finished. The shared validation executor
+closes its tree on every return before product checks or build callbacks run.
+A metadata-only selection never starts the reader. Per-read contexts cancel
+an in-flight blob exchange. The context supplied when creating the tree governs
+the reader lifetime, including shutdown and child reaping.
 Regular-file reads return independent caller-owned byte slices and are not
 retained by the tree. Symlink targets are retained as immutable owned strings
 by blob object ID; explicitly reading a symlink still returns independent
@@ -88,6 +109,7 @@ Committed-tree metadata and blob reads disable lazy fetching and Git transports
 for those child commands. Missing local objects produce inspection errors;
 source preparation retains its separate network-capable operations. See Git's
 [lazy-fetch controls](https://git-scm.com/docs/git) for the command mechanism.
+Candidate and delivery release-note reads use the same local object boundary.
 
 Public validation errors convert their diagnostic fields to the internal
 failure model for shared formatting. Converted failures retain their original
@@ -149,7 +171,8 @@ directories, missing paths, checkout boundaries, submodule paths, and symlink
 cycles; the caller selects which observations fail validation or are reported
 as out of scope.
 
-Resolution walks committed components and symlink targets in order. Active
+The shared Git path resolver walks committed components and symlink targets
+in order using the tree's indexed metadata and lazy symlink reader. Active
 symlink expansion detects cycles, and traversal honors cancellation. Absolute
 destinations and symlink targets within the repository directory map back to
 candidate-relative paths; existence still comes from committed entries.

docs/release.md

@@ -28,16 +28,12 @@ The maintained [source-delivery image](../examples/woodpecker/releasekit-source-
 and [consumer template image](../examples/woodpecker/tag-delivery.yml) follow the
 chosen build toolchain; update them together when that selection changes.
 
-The current consumer minimum is declared in [go.mod](../go.mod). When preparing
-a release that raises it to Go 1.26, the normal declaration is:
-
-```sh
-go mod edit -go=1.26.0
-```
-
-Retain any higher patch minimum required by dependencies or a specific fix.
-Make module changes before committing the candidate. A release preserving the
-existing minimum keeps its current declaration. Minimum increases must fit the
+The current consumer minimum is Go 1.26.0, declared in [go.mod](../go.mod).
+Keep it for a release unless release preparation deliberately selects a newer
+series under the [Go support policy](policy/release.md#consumer-minimum-and-release-toolchain).
+When increasing it, update `go.mod` to the first stable version of the selected
+series, or to a higher patch when a dependency or specific fix requires one.
+Make module changes before committing the candidate. Minimum increases must fit the
 [compatibility policy](policy/release.md#versioning-and-compatibility); before
 v1.0.0, an increase belongs in a minor release.
 

docs/releases/v0.4.0.md

@@ -0,0 +1,141 @@
+# ReleaseKit v0.4.0
+
+## Summary
+
+ReleaseKit supports releasing individual Go modules within a repository, with
+module-specific validation, builds, tags, and Gitea release pages. Root-module
+consumers retain the simple default configuration. This release also improves
+path resolution, offline source inspection, failure diagnostics, and efficiency.
+
+## Changes
+
+- `Check`, `Publish`, `Build`, and `Deliver` accept `ModuleDir` and expose the
+  resolved module directory, declared module path, and complete tag in their
+  results. Each operation resolves its module identity once. Product commands
+  receive repository and module context, and candidate callbacks receive module
+  identity.
+- Release tags follow the selected module's physical location and declared major
+  version. For example, `v2.1.0` for
+  `example.com/project/integrations/core/v2` uses
+  `integrations/core/v2.1.0` whether its physical directory is
+  `integrations/core` or `integrations/core/v2`. Its note remains at that physical
+  module's `docs/releases/v2.1.0.md`. Binary version output and asset names retain
+  the semantic version; Git publication and Gitea delivery use the complete tag.
+- Profiles add `module_dir`. Go checks and configured product commands run from
+  the selected module. Automatic committed-file inputs stop at independent
+  nested modules; vendored files remain included. Nested fixtures remain
+  available to the parent module's product tests.
+- `ValidationSpec.SharedFiles` and profile `validation.shared_files` select
+  repository-relative literal files for optional file checks. Omission selects
+  the available root copyright, license, and attribution defaults; an explicit
+  list replaces them, and an explicit empty list selects none. Explicit files
+  must exist even with checks disabled. Selection preserves the enabled checks
+  and Go test scope; reference inspection can read destinations elsewhere in
+  the captured repository.
+- Module releases receive separate Gitea pages, including source-only modules.
+  Relative build output and prebuilt delivery paths share the selected module
+  as their base. Prebuilt receipts bind artifacts to module identity, semantic
+  version, complete tag, source commit, and normalized build settings.
+- `ci-deliver` accepts the complete event tag. Prepared mode verifies a checkout
+  already detached at that tag, and expected-module and expected-tag checks bind
+  delivery to the CI selection before building or contacting Gitea. The
+  multi-module example shares a module map between its local launcher and
+  Woodpecker workflow. The workflow verifies the tag before reading the mapping,
+  profile, or tool selection, preserving the tagged configuration for retries.
+
+## Reliability and efficiency
+
+- Operations resolve the containing Git checkout root when invoked from a child
+  directory. Working-tree and committed module paths resolve symlinks consistently,
+  including paths containing `..`. Committed identity comes from Git objects;
+  page-only delivery can use committed module metadata absent from the worktree.
+  Valid local main-module paths are accepted.
+- Build failures preserve available identity and settings alongside completed
+  artifacts. Invalid versions retain the public error identity and the CLI's
+  usage-error status. Prebuilt delivery accepts equivalent checkout paths while
+  retaining source and module verification.
+- Committed release-note and validation reads remain offline in partial clones.
+  Validation reads blob contents and sizes as needed for selected inputs and
+  referenced destinations. Unavailable blobs outside that inspection scope do
+  not prevent applicable checks.
+- Module-file selection uses ancestor boundary lookups. Operations reuse Go
+  environment discovery while its inputs remain suitable for reuse and acquire
+  Go settings only when Go work needs them. Delivery reuses its local asset
+  verification when uploading missing assets, removing a repeated hashing pass.
+
+These improvements depend on the repository and workload. Artifact verification,
+exact remote comparisons, additive retries, and partial-delivery reporting retain
+their behavior.
+
+## Compatibility
+
+This pre-1.0 minor release introduces a clean API and receipt cutover:
+
+- `TaggedCheckoutRequest.Version` becomes `Tag`, containing the complete Git
+  tag. `VerifyOnly` adds verification of an already prepared checkout.
+- `PrepareBuildDependencies` now accepts `DependencyPreparationRequest` with
+  repository and module directories.
+- The private build receipt requires schema version 1 and module identity.
+  Existing receipts must be regenerated before prebuilt delivery.
+- Root-module committed-file checks exclude independent nested modules. Select
+  those modules separately when their files need release validation.
+
+The Go minimum remains 1.26.0. Root-module releases retain their existing note
+path, unprefixed tags, profile defaults, and ordinary workflow without a module
+map. The root orchestration facade and separate lightweight `buildinfo` facade
+retain their roles; runtime version access requires no migration.
+
+Source-tag publication remains the source-release completion point. Hosted page
+and asset delivery remains asynchronous and can be retried from the same
+immutable tag. ReleaseKit's deliverables remain its source tag and hosted note
+page.
+
+## Upgrade guidance
+
+1. Select v0.4.0 in each consumer module that uses ReleaseKit. For API consumers:
+
+   ```sh
+   go get gitea.maximumdirect.net/eric/ReleaseKit@v0.4.0
+   go mod tidy
+   ```
+
+   For consumers using the CLI as a Go tool dependency:
+
+   ```sh
+   go get -tool gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit@v0.4.0
+   go mod tidy
+   ```
+
+   Review and commit the resulting module and checksum changes together with
+   caller, profile, and workflow updates. Keep historical tag retries paired
+   with the tool and workflow recorded at that tag.
+
+2. Update preparation API calls for `Tag` and `DependencyPreparationRequest`.
+   For nested modules, set `ModuleDir` or profile `module_dir` to the physical
+   module location, with its own `go.mod` declaration. Keep ordinary `Version`
+   arguments as semantic versions. Use result `ModuleDir`, `ModulePath`, and
+   `Tag` where module identity is needed. Product commands can distinguish their
+   contexts through `RELEASEKIT_REPOSITORY_DIR` and `RELEASEKIT_MODULE_DIR`.
+
+3. Update `ci-deliver` invocations to pass the full event tag and required
+   `--commit OID`. Use `--prepared` after bootstrap verification and
+   `--expected-module DIR` for mapped launchers. Prepare and commit each binary
+   module's checksums before tagging so dependency preparation leaves tagged
+   source clean. Root-only consumers can retain the ordinary tag workflow.
+
+4. Rebuild existing prebuilt outputs with the v0.4.0 `build` command before
+   `deliver --assets DIR`. Relative output and asset paths both resolve from the
+   selected module. Review optional shared-file selections and nested-module
+   validation coverage, then run the consumer's ordinary checks.
+
+See the
+[adoption guide](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/docs/consumers/adoption.md),
+[configuration reference](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/docs/config.md),
+[CLI contract](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/docs/cli.md),
+[delivery guide](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/docs/consumers/delivery.md),
+and [multi-module example](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/examples/multi-module/README.md)
+for supported usage.
+
+[COPYRIGHT](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/COPYRIGHT) |
+[LICENSE](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/LICENSE) |
+[ATTRIBUTION](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.0/docs/oss/attribution.md)

docs/releases/v0.4.1.md

@@ -0,0 +1,29 @@
+# ReleaseKit v0.4.1
+
+## Summary
+
+This patch synchronizes shared state in the delivery and Gitea HTTP test
+fixtures. It makes the test suite reliable under concurrent request handling
+and the Go race detector. Production code and public behavior are unchanged.
+
+## Changes
+
+- Protect delivery fixture state with mutexes and independent snapshots; use
+  atomic observations for independent Gitea fixture counters and flags.
+- Keep fatal test assertions in the test goroutine and ensure release test
+  servers close with their owning tests.
+- Preserve existing delivery, conflict, retry, and source-tag assertions while
+  exercising the synchronized fixtures.
+
+## Compatibility
+
+There are no API, configuration, or runtime behavior changes, and no consumer
+migration is required. The Go minimum remains 1.26.0. The published v0.4.0 tag
+and its contents are unchanged.
+
+Consumers may upgrade to v0.4.1 with their existing API, profile, and workflow
+configuration.
+
+[COPYRIGHT](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.1/COPYRIGHT) |
+[LICENSE](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.1/LICENSE) |
+[ATTRIBUTION](https://gitea.maximumdirect.net/eric/ReleaseKit/src/tag/v0.4.1/docs/oss/attribution.md)

examples/multi-module/README.md

@@ -0,0 +1,132 @@
+# Multi-module release example
+
+This example maps selectors and complete event tags to a physical Go module
+directory and a repository-root profile. The library derives the release tag
+from the selected module declaration and physical location; the table only
+selects the corresponding profile and checkout directory.
+
+Copy the contents of this directory into a consumer repository root, keeping
+the listed module directories and profile paths at those locations, then run
+the launcher from that checkout.
+
+The sample modules declare Go 1.26.0, matching the current ReleaseKit consumer
+minimum.
+
+## Select the release tool
+
+The module files are setup skeletons. Set `RELEASEKIT_TOOL_VERSION` to a released
+ReleaseKit version containing module-release support, then register that tool in
+each consumer module before running the launcher or workflow:
+
+```sh
+: "${RELEASEKIT_TOOL_VERSION:?Select a ReleaseKit release with module-release support}"
+for module_dir in . integrations/ckconfig integrations/core/v2; do
+  go -C "$module_dir" get -tool "gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit@${RELEASEKIT_TOOL_VERSION}"
+  go -C "$module_dir" mod tidy
+done
+```
+
+Review and commit the generated tool, dependency, and checksum declarations.
+The [adoption guide](../../docs/consumers/adoption.md) owns tool registration and
+coordinated tool/workflow upgrades. The
+[v0.4.0 release note](../../docs/releases/v0.4.0.md) describes module-release
+support and migration from earlier versions.
+
+## Module mapping and publication
+
+`release-modules.tsv` is literal tab-separated text with four columns:
+
+1. Local selector.
+2. Shell pattern matched against a complete event tag.
+3. Repository-relative physical module directory (`.` means the root module).
+4. Repository-relative profile path.
+
+The checked-in patterns are `v[01].*`, `integrations/ckconfig/v*`, and
+`integrations/core/v2.*`. The helper passes pattern text to the shell's `case`
+matcher without `eval`. A tag must match exactly one row; missing and ambiguous
+matches are configuration errors. Module and profile paths may contain spaces.
+The `core-v2` row places the Go module physically under `integrations/core/v2`
+and declares a `/v2` module path. ReleaseKit derives the versioned tag under
+`integrations/core`, while the table retains the full physical path.
+
+Before running candidate checks offline, prepare each module's dependencies in
+its own directory:
+
+```sh
+go -C . mod download
+go -C integrations/ckconfig mod download
+go -C integrations/core/v2 mod download
+```
+
+Commit each generated `go.sum` with its module files. The binary delivery
+profile prepares application dependencies in the tagged module before building;
+the committed sums keep that prepared checkout clean for delivery verification.
+
+Then select a module and semantic version with the shared launcher:
+
+```sh
+./release.sh root v1.2.3
+./release.sh ckconfig v1.2.3
+./release.sh core-v2 v2.1.0
+```
+
+The launcher copies the selected module's `go.mod` and `go.sum` to temporary
+alternate module files outside the checkout, resolves ReleaseKit from that
+module's local dependency selection, and builds the tool there. It invokes
+`publish` with the repository profile and `--expected-module` so the library
+can verify that the profile agrees with the selected table row. The temporary
+files and tool are removed on exit. As with any `publish` invocation, commit the
+selected module's release note and prepare its repository before publishing.
+
+If an integration depends on a sibling release, publish the dependency first,
+then publish the integration with the version that consumes it. For example,
+publish the core release before an integration that requires that release.
+This declaration does not infer dependency order or rerun the standard suite.
+
+The maintained [Woodpecker example](woodpecker.yml) uses the same map and
+selector for root, `ckconfig`, and major-version tags. It verifies and detaches
+the literal event tag before selecting the module, copies that module's metadata
+outside the checkout, and builds the ReleaseKit version selected there. It then
+uses `ci-deliver --prepared` with the mapped profile and expected physical module.
+The `core-v2` profile demonstrates binary delivery; the other profiles are
+page-only. Before enabling the workflow, configure each selected profile's
+`delivery` destination and add the Woodpecker repository secret
+`releasekit_gitea_token`; the workflow exposes it as
+`RELEASEKIT_GITEA_TOKEN` only in the delivery step.
+
+Retries use the selected tag's module files and matching workflow. Tags whose
+tool predates this interface use their corresponding historical workflow.
+
+## Local source verification
+
+For verification before a compatible release is published, copy this example
+into a disposable consumer checkout. Set `RELEASEKIT_SOURCE` to the absolute
+path of a prepared ReleaseKit checkout, then select its source in those fixture
+modules:
+
+```sh
+: "${RELEASEKIT_SOURCE:?Set the absolute ReleaseKit checkout path}"
+for module_dir in . integrations/ckconfig integrations/core/v2; do
+  go -C "$module_dir" mod edit \
+    -require=gitea.maximumdirect.net/eric/ReleaseKit@v0.0.0 \
+    -replace="gitea.maximumdirect.net/eric/ReleaseKit=$RELEASEKIT_SOURCE" \
+    -tool=gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit
+  GOTOOLCHAIN=local GOWORK=off go -C "$module_dir" mod tidy
+done
+```
+
+Here `v0.0.0` is a fixture placeholder resolved by the local replacement.
+Keep these declarations in the disposable checkout. Add representative product
+source and each selected product's module-local release note, then commit the
+fixture and run the source-selected tool without publishing:
+
+```sh
+go tool releasekit check --config releasekit-root.json v1.2.3
+go -C integrations/ckconfig tool releasekit check --config releasekit-ckconfig.json v1.2.3
+go -C integrations/core/v2 tool releasekit check --config releasekit-core-v2.json v2.1.0
+```
+
+These commands use the repository-root profile paths even when invoked from a
+child module. The core profile also verifies the native binary and injected
+version. Prepared dependencies allow this verification with `GOPROXY=off` and
+`GOSUMDB=off`.

examples/multi-module/go.mod

@@ -0,0 +1,3 @@
+module example.com/multi-module-consumer
+
+go 1.26.0

examples/multi-module/integrations/ckconfig/go.mod

@@ -0,0 +1,3 @@
+module example.com/multi-module-consumer/integrations/ckconfig
+
+go 1.26.0

examples/multi-module/integrations/core/v2/go.mod

@@ -0,0 +1,3 @@
+module example.com/multi-module-consumer/integrations/core/v2
+
+go 1.26.0

examples/multi-module/integrations/core/v2/main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+
+func main() {
+	fmt.Printf("core %s\n", buildinfo.Version())
+}

examples/multi-module/release-modules.tsv

@@ -0,0 +1,4 @@
+# selector<TAB>tag pattern<TAB>module directory<TAB>profile path
+root	v[01].*	.	releasekit-root.json
+ckconfig	integrations/ckconfig/v*	integrations/ckconfig	releasekit-ckconfig.json
+core-v2	integrations/core/v2.*	integrations/core/v2	releasekit-core-v2.json

examples/multi-module/release.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+set -eu
+
+usage() {
+  echo "usage: release.sh SELECTOR VERSION" >&2
+  exit 2
+}
+
+[ "$#" -eq 2 ] || usage
+selector=$1
+version=$2
+script_dir=$(CDPATH= cd "$(dirname "$0")" && pwd)
+repository_dir=$(git -C "$script_dir" rev-parse --show-toplevel)
+
+bootstrap_dir=$(mktemp -d "$(dirname "$repository_dir")/.releasekit-bootstrap.XXXXXX")
+selection_file=$bootstrap_dir/module-selection.tsv
+trap 'rm -rf "$bootstrap_dir"' EXIT
+"$script_dir/select-module.sh" selector "$selector" > "$selection_file"
+
+tab=$(printf '\t')
+IFS="$tab" read -r selected_selector tag_pattern module_dir profile_path < "$selection_file"
+module_path=$repository_dir
+if [ "$module_dir" != . ]; then
+  module_path=$repository_dir/$module_dir
+fi
+
+cp "$module_path/go.mod" "$bootstrap_dir/releasekit.mod"
+if [ -f "$module_path/go.sum" ]; then
+  cp "$module_path/go.sum" "$bootstrap_dir/releasekit.sum"
+else
+  : > "$bootstrap_dir/releasekit.sum"
+fi
+
+releasekit_module=gitea.maximumdirect.net/eric/ReleaseKit
+(
+  cd "$module_path"
+  export GOWORK=off
+  export GOTOOLCHAIN=local
+  go list -mod=mod -modfile="$bootstrap_dir/releasekit.mod" -m "$releasekit_module"
+  go build -mod=mod -modfile="$bootstrap_dir/releasekit.mod" \
+    -o "$bootstrap_dir/releasekit" "$releasekit_module/cmd/releasekit"
+)
+
+"$bootstrap_dir/releasekit" publish \
+  --repo "$repository_dir" \
+  --config "$profile_path" \
+  --expected-module "$module_dir" \
+  "$version"

examples/multi-module/releasekit-ckconfig.json

@@ -0,0 +1,4 @@
+{
+  "product": "Example Consumer Integration",
+  "module_dir": "integrations/ckconfig"
+}

examples/multi-module/releasekit-core-v2.json

@@ -0,0 +1,9 @@
+{
+  "product": "Example Consumer Core v2",
+  "module_dir": "integrations/core/v2",
+  "build": {
+    "main_package": ".",
+    "binary_name": "core",
+    "targets": ["linux/amd64"]
+  }
+}

examples/multi-module/releasekit-root.json

@@ -0,0 +1,4 @@
+{
+  "product": "Example Consumer",
+  "module_dir": "."
+}

examples/multi-module/select-module.sh

@@ -0,0 +1,70 @@
+#!/bin/sh
+set -eu
+
+usage() {
+  echo "usage: select-module.sh selector|tag VALUE" >&2
+  exit 2
+}
+
+[ "$#" -eq 2 ] || usage
+mode=$1
+value=$2
+case "$mode" in
+  selector|tag) ;;
+  *) usage ;;
+esac
+
+script_dir=$(CDPATH= cd "$(dirname "$0")" && pwd)
+mapping=${RELEASEKIT_MODULE_MAP:-$script_dir/release-modules.tsv}
+[ -f "$mapping" ] || { echo "module map not found: $mapping" >&2; exit 2; }
+
+tab=$(printf '\t')
+matches=0
+selected_selector=
+selected_pattern=
+selected_module=
+selected_profile=
+
+while IFS="$tab" read -r selector pattern module profile || [ -n "${selector:-}${pattern:-}${module:-}${profile:-}" ]; do
+  case "${selector:-}" in
+    ''|\#*) continue ;;
+  esac
+  fields=$(awk -F '\t' '{ print NF }' <<EOF
+$selector$tab$pattern$tab$module$tab$profile
+EOF
+)
+  [ "$fields" -eq 4 ] || { echo "module map row must have four tab-separated fields" >&2; exit 2; }
+  [ -n "$pattern" ] && [ -n "$module" ] && [ -n "$profile" ] || {
+    echo "module map row has an empty field for selector $selector" >&2
+    exit 2
+  }
+
+  matched=false
+  if [ "$mode" = selector ]; then
+    [ "$selector" = "$value" ] && matched=true
+  else
+    # The value remains a shell pattern in this case statement; it is never eval'd.
+    case "$value" in
+      $pattern) matched=true ;;
+    esac
+  fi
+  if [ "$matched" = true ]; then
+    matches=$((matches + 1))
+    selected_selector=$selector
+    selected_pattern=$pattern
+    selected_module=$module
+    selected_profile=$profile
+  fi
+done < "$mapping"
+
+if [ "$matches" -ne 1 ]; then
+  if [ "$matches" -eq 0 ]; then
+    echo "no module map row matches $mode $value" >&2
+  else
+    echo "module map has ambiguous rows for $mode $value" >&2
+  fi
+  exit 2
+fi
+
+printf '%s\t%s\t%s\t%s\n' \
+  "$selected_selector" "$selected_pattern" "$selected_module" "$selected_profile"

examples/multi-module/woodpecker.yml

@@ -0,0 +1,63 @@
+when:
+  - event: tag
+    ref:
+      include:
+        - refs/tags/v[01].*
+        - refs/tags/integrations/ckconfig/v*
+        - refs/tags/integrations/core/v2.*
+
+steps:
+  - name: deliver
+    image: golang:1.26.8-bookworm
+    environment:
+      RELEASEKIT_GITEA_TOKEN:
+        from_secret: releasekit_gitea_token
+    commands:
+      - |
+        set -eu
+        test -n "$${CI_COMMIT_TAG}"
+        test -n "$${CI_COMMIT_SHA}"
+        git check-ref-format "refs/tags/$${CI_COMMIT_TAG}"
+        git fetch origin "refs/tags/$${CI_COMMIT_TAG}:refs/tags/$${CI_COMMIT_TAG}"
+        tag_commit=$(git rev-parse --verify "refs/tags/$${CI_COMMIT_TAG}^{commit}")
+        expected_commit=$(printf '%s' "$${CI_COMMIT_SHA}" | tr '[:upper:]' '[:lower:]')
+        test "$(printf '%s' "$${tag_commit}" | tr '[:upper:]' '[:lower:]')" = "$${expected_commit}"
+        git checkout --detach "$${tag_commit}"
+        test "$(git rev-parse HEAD | tr '[:upper:]' '[:lower:]')" = "$${expected_commit}"
+        test -z "$(git status --porcelain --untracked-files=all)"
+
+        bootstrap_dir=$(mktemp -d "$${CI_WORKSPACE%/*}/.releasekit-bootstrap.XXXXXX")
+        trap 'rm -rf "$${bootstrap_dir}"' EXIT
+        selection_file="$${bootstrap_dir}/module-selection.tsv"
+        "$${CI_WORKSPACE}/select-module.sh" tag "$${CI_COMMIT_TAG}" > "$${selection_file}"
+        tab=$(printf '\t')
+        IFS="$${tab}" read -r selector tag_pattern module_dir profile_path < "$${selection_file}"
+        module_path="$${CI_WORKSPACE}"
+        if [ "$${module_dir}" != . ]; then
+          module_path="$${CI_WORKSPACE}/$${module_dir}"
+        fi
+        cp "$${module_path}/go.mod" "$${bootstrap_dir}/go.mod"
+        if [ -f "$${module_path}/go.sum" ]; then
+          cp "$${module_path}/go.sum" "$${bootstrap_dir}/go.sum"
+        else
+          : > "$${bootstrap_dir}/go.sum"
+        fi
+        cp "$${bootstrap_dir}/go.mod" "$${bootstrap_dir}/releasekit.mod"
+        cp "$${bootstrap_dir}/go.sum" "$${bootstrap_dir}/releasekit.sum"
+
+        export GOWORK=off
+        export GOTOOLCHAIN=local
+        releasekit_module=gitea.maximumdirect.net/eric/ReleaseKit
+        (
+          cd "$${module_path}"
+          go list -mod=mod -modfile="$${bootstrap_dir}/releasekit.mod" -m "$${releasekit_module}"
+          go build -mod=mod -modfile="$${bootstrap_dir}/releasekit.mod" \
+            -o "$${bootstrap_dir}/releasekit" "$${releasekit_module}/cmd/releasekit"
+        )
+        "$${bootstrap_dir}/releasekit" ci-deliver \
+          --repo "$${CI_WORKSPACE}" \
+          --config "$${profile_path}" \
+          --expected-module "$${module_dir}" \
+          --prepared \
+          --commit "$${CI_COMMIT_SHA}" \
+          "$${CI_COMMIT_TAG}"

examples/woodpecker/releasekit-source-delivery.yml

@@ -29,5 +29,6 @@ steps:
         go build -mod=readonly -o "$${bootstrap_dir}/releasekit" ./cmd/releasekit
         "$${bootstrap_dir}/releasekit" ci-deliver \
           --repo "$${CI_WORKSPACE}" \
+          --prepared \
           --commit "$${CI_COMMIT_SHA}" \
           "$${CI_COMMIT_TAG}"

examples/woodpecker/tag-delivery.yml

@@ -45,5 +45,6 @@ steps:
           -o "$${bootstrap_dir}/releasekit" "$${releasekit_module}/cmd/releasekit"
         "$${bootstrap_dir}/releasekit" ci-deliver \
           --repo "$${CI_WORKSPACE}" \
+          --prepared \
           --commit "$${CI_COMMIT_SHA}" \
           "$${CI_COMMIT_TAG}"

internal/artifact/artifact.go

@@ -3,21 +3,51 @@ package artifact
 
 import (
 	"fmt"
+	"path/filepath"
 	"strings"
 )
 
 const ManifestFilename = "SHA256SUMS"
 
+// OutputDirectory resolves build output and prebuilt asset directories from
+// the absolute selected module directory.
+func OutputDirectory(moduleDir, directory string) string {
+	if directory == "" {
+		directory = "dist"
+	}
+	if !filepath.IsAbs(directory) {
+		directory = filepath.Join(moduleDir, directory)
+	}
+	return filepath.Clean(directory)
+}
+
 type Target struct {
 	OS   string
 	Arch string
 }
 
+// Settings contains normalized inputs shared by build execution and evidence.
+type Settings struct {
+	MainPackage string
+	BinaryName  string
+	Targets     []Target
+}
+
 type Declaration struct {
 	Target   Target
 	Filename string
 }
 
+// NormalizeSettings copies build inputs and removes duplicate targets while
+// preserving their first occurrence.
+func NormalizeSettings(mainPackage, binaryName string, targets []Target) Settings {
+	return Settings{
+		MainPackage: mainPackage,
+		BinaryName:  binaryName,
+		Targets:     NormalizeTargets(targets),
+	}
+}
+
 // NormalizeTargets removes duplicate targets while preserving their first
 // occurrence.
 func NormalizeTargets(targets []Target) []Target {

internal/artifact/artifact_test.go

@@ -17,6 +17,22 @@ func TestNormalizeTargetsPreservesOrderAndFirstOccurrence(t *testing.T) {
 	}
 }
 
+func TestNormalizeSettingsKeepsBuildInputsAndNormalizesTargets(t *testing.T) {
+	settings := NormalizeSettings("./cmd/app", "app", []Target{
+		{OS: "linux", Arch: "amd64"},
+		{OS: "windows", Arch: "arm64"},
+		{OS: "linux", Arch: "amd64"},
+	})
+	want := Settings{
+		MainPackage: "./cmd/app",
+		BinaryName:  "app",
+		Targets:     []Target{{OS: "linux", Arch: "amd64"}, {OS: "windows", Arch: "arm64"}},
+	}
+	if !reflect.DeepEqual(settings, want) {
+		t.Fatalf("NormalizeSettings() = %#v, want %#v", settings, want)
+	}
+}
+
 func TestExpectedBuildUsesSharedNamesInTargetOrder(t *testing.T) {
 	targets := []Target{{OS: "windows", Arch: "arm64"}, {OS: "linux", Arch: "amd64"}}
 	want := []Declaration{

internal/build/build.go

@@ -16,23 +16,20 @@ import (
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/candidate"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/tempdir"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
 
 type Target = artifact.Target
-
-type Spec struct {
-	MainPackage string
-	BinaryName  string
-	Targets     []Target
-}
+type Spec = artifact.Settings
 
 type Request struct {
-	RepositoryDir string
-	Version       string
-	Spec          Spec
-	OutputDir     string
-	Output        io.Writer
+	Identity  releaseidentity.Identity
+	Spec      Spec
+	OutputDir string
+	Output    io.Writer
+	ToolOwner *gotool.Owner
 }
 
 type Artifact struct {
@@ -44,8 +41,12 @@ type Artifact struct {
 
 type Result struct {
 	RepositoryDir   string
+	ModuleDir       string
+	ModulePath      string
+	Tag             string
 	CandidateCommit string
 	SourceVerified  bool
+	Settings        artifact.Settings
 	Version         string
 	MainPackage     string
 	BinaryName      string
@@ -55,25 +56,32 @@ type Result struct {
 	Compiler        string
 }
 
-func Build(ctx context.Context, request Request) (Result, error) {
+func BuildResolved(ctx context.Context, request Request) (Result, error) {
+	identity := request.Identity
+	settings := artifact.NormalizeSettings(request.Spec.MainPackage, request.Spec.BinaryName, request.Spec.Targets)
 	result := Result{
-		Version:     request.Version,
-		MainPackage: request.Spec.MainPackage,
-		BinaryName:  request.Spec.BinaryName,
-		Targets:     artifact.NormalizeTargets(request.Spec.Targets),
+		RepositoryDir: identity.RepositoryDir,
+		ModuleDir:     identity.ModuleDir,
+		ModulePath:    identity.ModulePath,
+		Tag:           identity.Tag,
+		Settings:      settings,
+		Version:       identity.Version,
+		MainPackage:   settings.MainPackage,
+		BinaryName:    settings.BinaryName,
+		Targets:       settings.Targets,
 	}
-	if !versioncontract.ValidStableVersion(request.Version) {
-		return result, fmt.Errorf("%w: %q", candidate.ErrInvalidVersion, request.Version)
+	if !versioncontract.ValidStableVersion(identity.Version) {
+		return result, fmt.Errorf("%w: %q", candidate.ErrInvalidVersion, identity.Version)
 	}
-	if request.RepositoryDir == "" {
-		return result, errors.New("build requires a repository directory")
+	if identity.RepositoryDir == "" || identity.ModuleDir == "" || identity.ModulePath == "" {
+		return result, errors.New("build requires a resolved module identity")
 	}
 	if len(result.Targets) != 0 {
-		if request.Spec.MainPackage == "" {
+		if settings.MainPackage == "" {
 			return result, errors.New("build requires a main package when targets are selected")
 		}
-		if !artifact.ValidComponent(request.Spec.BinaryName) {
-			return result, fmt.Errorf("unsafe binary name %q", request.Spec.BinaryName)
+		if !artifact.ValidComponent(settings.BinaryName) {
+			return result, fmt.Errorf("unsafe binary name %q", settings.BinaryName)
 		}
 		for _, target := range result.Targets {
 			if !artifact.ValidComponent(target.OS) || !artifact.ValidComponent(target.Arch) {
@@ -84,11 +92,16 @@ func Build(ctx context.Context, request Request) (Result, error) {
 	if err := ctx.Err(); err != nil {
 		return result, fmt.Errorf("build canceled: %w", err)
 	}
-	repositoryDir, err := filepath.Abs(request.RepositoryDir)
+	repositoryDir, err := filepath.Abs(identity.RepositoryDir)
 	if err != nil {
 		return result, fmt.Errorf("resolve repository directory: %w", err)
 	}
 	result.RepositoryDir = repositoryDir
+	moduleDir, err := filepath.Abs(identity.ModuleDir)
+	if err != nil {
+		return result, fmt.Errorf("resolve module directory: %w", err)
+	}
+	result.ModuleDir = moduleDir
 	commit, err := gitCommit(ctx, repositoryDir)
 	if err != nil {
 		return result, err
@@ -100,12 +113,12 @@ func Build(ctx context.Context, request Request) (Result, error) {
 	}
 
 	if len(result.Targets) == 0 {
-		result.OutputDir = resolvedOutputDir(repositoryDir, request.OutputDir)
+		result.OutputDir = artifact.OutputDirectory(moduleDir, request.OutputDir)
 		return result, nil
 	}
 
-	result.OutputDir = resolvedOutputDir(repositoryDir, request.OutputDir)
-	declarations := artifact.ExpectedBuild(request.Spec.BinaryName, request.Version, result.Targets)
+	result.OutputDir = artifact.OutputDirectory(moduleDir, request.OutputDir)
+	declarations := artifact.ExpectedBuild(settings.BinaryName, identity.Version, settings.Targets)
 	filenames := make([]string, len(declarations))
 	for i, declaration := range declarations {
 		filenames[i] = declaration.Filename
@@ -114,11 +127,15 @@ func Build(ctx context.Context, request Request) (Result, error) {
 		return result, fmt.Errorf("create build output directory %q: %w", result.OutputDir, err)
 	}
 
-	goTool, err := gotool.New(ctx, repositoryDir)
+	owner := request.ToolOwner
+	if owner == nil {
+		owner = gotool.NewOwner(moduleDir)
+	}
+	goTool, err := owner.Acquire(ctx)
 	if err != nil {
 		return result, fmt.Errorf("prepare Go toolchain: %w", err)
 	}
-	compiler, err := goTool.Output(ctx, repositoryDir, gotool.Native, gotool.Target{}, nil, "version")
+	compiler, err := goTool.Output(ctx, moduleDir, gotool.Native, gotool.Target{}, nil, "version")
 	if err != nil {
 		return result, fmt.Errorf("identify Go compiler: %w", err)
 	}
@@ -135,7 +152,7 @@ func Build(ctx context.Context, request Request) (Result, error) {
 		if request.Output != nil {
 			fmt.Fprintf(request.Output, "building %s/%s as %s\n", target.OS, target.Arch, filename)
 		}
-		if err := buildTarget(ctx, goTool, repositoryDir, request.Spec.MainPackage, path, request.Version, target); err != nil {
+		if err := buildTarget(ctx, goTool, moduleDir, settings.MainPackage, path, identity.Version, target); err != nil {
 			return result, fmt.Errorf("build target %s/%s: %w", target.OS, target.Arch, err)
 		}
 		artifact := Artifact{Path: path, Filename: filename, Target: target}
@@ -153,26 +170,26 @@ func Build(ctx context.Context, request Request) (Result, error) {
 		}
 	}
 	if smokePath == "" {
-		temporaryDir, err := os.MkdirTemp("", "releasekit-native-smoke-")
+		temporaryDir, err := tempdir.Outside(repositoryDir, "releasekit-native-smoke-")
 		if err != nil {
 			return result, fmt.Errorf("create native smoke directory: %w", err)
 		}
 		defer os.RemoveAll(temporaryDir)
-		smokePath = filepath.Join(temporaryDir, request.Spec.BinaryName)
+		smokePath = filepath.Join(temporaryDir, settings.BinaryName)
 		if host.OS == "windows" {
 			smokePath += ".exe"
 		}
 		if request.Output != nil {
 			fmt.Fprintf(request.Output, "building temporary version check for %s/%s\n", host.OS, host.Arch)
 		}
-		if err := buildTarget(ctx, goTool, repositoryDir, request.Spec.MainPackage, smokePath, request.Version, host); err != nil {
+		if err := buildTarget(ctx, goTool, moduleDir, settings.MainPackage, smokePath, identity.Version, host); err != nil {
 			return result, fmt.Errorf("build native version check: %w", err)
 		}
 	}
 	if request.Output != nil {
-		fmt.Fprintf(request.Output, "checking %s version output\n", request.Spec.BinaryName)
+		fmt.Fprintf(request.Output, "checking %s version output\n", settings.BinaryName)
 	}
-	if err := checkVersion(ctx, smokePath, request.Spec.BinaryName, request.Version); err != nil {
+	if err := checkVersion(ctx, smokePath, settings.BinaryName, identity.Version); err != nil {
 		return result, err
 	}
 	commitAfter, err := gitCommit(ctx, repositoryDir)
@@ -187,19 +204,6 @@ func Build(ctx context.Context, request Request) (Result, error) {
 	return result, nil
 }
 
-func resolvedOutputDir(repositoryDir, outputDir string) string {
-	if outputDir == "" {
-		outputDir = filepath.Join(repositoryDir, "dist")
-	} else if !filepath.IsAbs(outputDir) {
-		outputDir = filepath.Join(repositoryDir, outputDir)
-	}
-	resolved, err := filepath.Abs(outputDir)
-	if err != nil {
-		return filepath.Clean(outputDir)
-	}
-	return resolved
-}
-
 func gitCommit(ctx context.Context, repositoryDir string) (string, error) {
 	command := exec.CommandContext(ctx, "git", "-C", repositoryDir, "rev-parse", "--verify", "HEAD^{commit}")
 	output, err := command.Output()
@@ -212,9 +216,9 @@ func gitCommit(ctx context.Context, repositoryDir string) (string, error) {
 	return strings.TrimSpace(string(output)), nil
 }
 
-func buildTarget(ctx context.Context, goTool *gotool.Tool, repositoryDir, mainPackage, outputPath, version string, target Target) error {
+func buildTarget(ctx context.Context, goTool *gotool.Tool, moduleDir, mainPackage, outputPath, version string, target Target) error {
 	ldflags := "-s -w -X " + versioncontract.InjectedVersionLinkerSymbol + "=" + version
-	err := goTool.Run(ctx, repositoryDir, gotool.Static, gotool.Target{OS: target.OS, Arch: target.Arch}, nil,
+	err := goTool.Run(ctx, moduleDir, gotool.Static, gotool.Target{OS: target.OS, Arch: target.Arch}, nil,
 		"build", "-o", outputPath, "-mod=readonly", "-trimpath", "-buildvcs=false", "-ldflags", ldflags, mainPackage)
 	return err
 }

internal/build/candidate.go

@@ -5,29 +5,47 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path/filepath"
 
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/candidate"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/tempdir"
 )
 
-func CandidateCallback(spec *Spec, output io.Writer) func(context.Context, candidate.Candidate) error {
+func CandidateCallback(spec *Spec, output io.Writer) func(context.Context, candidate.Candidate, *gotool.Owner) error {
 	if spec == nil || len(spec.Targets) == 0 {
 		return nil
 	}
 	selected := *spec
 	selected.Targets = append([]Target(nil), spec.Targets...)
-	return func(ctx context.Context, captured candidate.Candidate) error {
+	return func(ctx context.Context, captured candidate.Candidate, owner *gotool.Owner) error {
+		moduleSubdir, err := filepath.Rel(captured.RepositoryDir, captured.ModuleDir)
+		if err != nil {
+			return fmt.Errorf("resolve captured module path: %w", err)
+		}
+		identity := releaseidentity.Identity{
+			Selection: releaseidentity.Selection{
+				RepositoryDir: captured.RepositoryDir,
+				ModuleDir:     captured.ModuleDir,
+				ModuleSubdir:  filepath.ToSlash(moduleSubdir),
+			},
+			ModulePath: captured.ModulePath,
+			Version:    captured.Version,
+			Tag:        captured.Tag,
+			NotePath:   filepath.ToSlash(filepath.Join(moduleSubdir, "docs", "releases", captured.Version+".md")),
+		}
 		temporaryDir, err := tempdir.Outside(captured.RepositoryDir, "releasekit-candidate-build-")
 		if err != nil {
 			return fmt.Errorf("create temporary candidate build output: %w", err)
 		}
 		defer os.RemoveAll(temporaryDir)
-		_, err = Build(ctx, Request{
-			RepositoryDir: captured.RepositoryDir,
-			Version:       captured.Version,
-			Spec:          selected,
-			OutputDir:     temporaryDir,
-			Output:        output,
+		_, err = BuildResolved(ctx, Request{
+			Identity:  identity,
+			Spec:      selected,
+			OutputDir: temporaryDir,
+			Output:    output,
+			ToolOwner: owner,
 		})
 		if err != nil {
 			return fmt.Errorf("build candidate: %w", err)

internal/candidate/check.go

@@ -8,10 +8,12 @@ import (
 	"fmt"
 	"io"
 	"os/exec"
-	"path/filepath"
 	"strings"
 
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/process"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/validation"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
@@ -20,6 +22,9 @@ var ErrInvalidVersion = errors.New("invalid stable version")
 
 type Candidate struct {
 	RepositoryDir string
+	ModuleDir     string
+	ModulePath    string
+	Tag           string
 	Commit        string
 	Version       string
 	Note          string
@@ -27,29 +32,33 @@ type Candidate struct {
 
 type Request struct {
 	RepositoryDir    string
+	ModuleDir        string
 	Product          string
 	Version          string
 	Validation       validation.Settings
 	AdditionalChecks func(context.Context, Candidate) error
-	AfterValidate    func(context.Context, Candidate) error
+	AfterValidate    func(context.Context, Candidate, *gotool.Owner) error
 	Output           io.Writer
+	ToolOwner        *gotool.Owner
 }
 
 func Check(ctx context.Context, request Request) (Candidate, error) {
 	captured, err := Capture(ctx, request)
 	if err != nil {
-		return Candidate{}, err
+		return captured, err
 	}
+	request.ToolOwner = gotool.NewOwner(captured.ModuleDir)
 	if err := Validate(ctx, request, captured); err != nil {
-		return Candidate{}, err
+		return captured, err
 	}
 	if request.AfterValidate != nil {
-		if err := request.AfterValidate(ctx, captured); err != nil {
-			return Candidate{}, fmt.Errorf("after candidate validation: %w", err)
+		callbackErr := request.AfterValidate(ctx, captured, request.ToolOwner)
+		if callbackErr != nil {
+			return captured, fmt.Errorf("after candidate validation: %w", callbackErr)
 		}
 	}
 	if err := Recheck(ctx, captured, ""); err != nil {
-		return Candidate{}, err
+		return captured, err
 	}
 	return captured, nil
 }
@@ -57,59 +66,76 @@ func Check(ctx context.Context, request Request) (Candidate, error) {
 // Capture validates request identity and records one clean local candidate,
 // including the note bytes from the captured commit. It does not run checks.
 func Capture(ctx context.Context, request Request) (Candidate, error) {
+	captured := Candidate{Version: request.Version}
 	if !validStableVersion(request.Version) {
-		return Candidate{}, fmt.Errorf("%w: %q", ErrInvalidVersion, request.Version)
+		return captured, fmt.Errorf("%w: %q", ErrInvalidVersion, request.Version)
 	}
 	if strings.TrimSpace(request.Product) == "" {
-		return Candidate{}, errors.New("product is required")
+		return captured, errors.New("product is required")
 	}
 
-	repositoryDir, err := filepath.Abs(request.RepositoryDir)
+	repositoryDir, err := git.RepositoryRoot(ctx, request.RepositoryDir)
 	if err != nil {
-		return Candidate{}, fmt.Errorf("resolve repository directory: %w", err)
+		return captured, fmt.Errorf("resolve repository directory: %w", err)
 	}
+	captured.RepositoryDir = repositoryDir
 	state, err := inspectLocalState(ctx, repositoryDir)
 	if err != nil {
-		return Candidate{}, err
+		return captured, err
 	}
+	captured.Commit = state.commit
 	if state.branch != "main" {
-		return Candidate{}, fmt.Errorf("release candidate must be on main; current branch is %q", state.branch)
+		return captured, fmt.Errorf("release candidate must be on main; current branch is %q", state.branch)
 	}
 	if state.status != "" {
-		return Candidate{}, fmt.Errorf("release candidate worktree and index must be clean:\n%s", state.status)
+		return captured, fmt.Errorf("release candidate worktree and index must be clean:\n%s", state.status)
 	}
 
-	path := "docs/releases/" + request.Version + ".md"
-	note, err := gitOutput(ctx, repositoryDir, "show", state.commit+":"+path)
+	identity, err := releaseidentity.FromCommitted(ctx, repositoryDir, request.ModuleDir, request.Version, state.commit)
+	captured.ModuleDir = identity.ModuleDir
+	captured.ModulePath = identity.ModulePath
+	captured.Tag = identity.Tag
 	if err != nil {
-		return Candidate{}, fmt.Errorf("read committed release note %q: %w", path, err)
+		return captured, fmt.Errorf("resolve selected module release identity: %w", err)
+	}
+	note, err := git.ReadCommitFile(ctx, identity.RepositoryDir, state.commit, identity.NotePath)
+	if err != nil {
+		return captured, fmt.Errorf("read committed release note %q: %w", identity.NotePath, err)
 	}
 	if err := validateNote(note, request.Product, request.Version); err != nil {
-		return Candidate{}, fmt.Errorf("release note %q: %w", path, err)
+		return captured, fmt.Errorf("release note %q: %w", identity.NotePath, err)
 	}
-	if exists, err := hasLocalTag(ctx, repositoryDir, request.Version); err != nil {
-		return Candidate{}, fmt.Errorf("inspect local tag %q: %w", request.Version, err)
+	if exists, err := hasLocalTag(ctx, repositoryDir, identity.Tag); err != nil {
+		return captured, fmt.Errorf("inspect local tag %q: %w", identity.Tag, err)
 	} else if exists {
-		return Candidate{}, fmt.Errorf("local tag %q already exists", request.Version)
+		return captured, fmt.Errorf("local tag %q already exists", identity.Tag)
 	}
 
-	return Candidate{RepositoryDir: repositoryDir, Commit: state.commit, Version: request.Version, Note: string(note)}, nil
+	captured.Note = string(note)
+	return captured, nil
 }
 
 // Validate runs the selected offline Go suite, followed by AdditionalChecks
 // when supplied, for the captured candidate.
 func Validate(ctx context.Context, request Request, captured Candidate) error {
+	owner := request.ToolOwner
+	if owner == nil {
+		owner = gotool.NewOwner(captured.ModuleDir)
+	}
 	if err := validation.Run(ctx, validation.Request{
 		RepositoryDir: captured.RepositoryDir,
+		ModuleDir:     captured.ModuleDir,
 		Commit:        captured.Commit,
 		Output:        request.Output,
 		Settings:      request.Validation,
+		ToolOwner:     owner,
 	}); err != nil {
 		return fmt.Errorf("validate candidate %s: %w", captured.Commit, err)
 	}
 	if request.AdditionalChecks != nil {
-		if err := request.AdditionalChecks(ctx, captured); err != nil {
-			return fmt.Errorf("validate candidate %s: %w", captured.Commit, err)
+		callbackErr := request.AdditionalChecks(ctx, captured)
+		if callbackErr != nil {
+			return fmt.Errorf("validate candidate %s: %w", captured.Commit, callbackErr)
 		}
 	}
 	return nil
@@ -133,23 +159,23 @@ func Recheck(ctx context.Context, captured Candidate, expectedTagObject string)
 		return fmt.Errorf("worktree or index changed:\n%s", current.status)
 	}
 	if expectedTagObject == "" {
-		if exists, err := hasLocalTag(ctx, captured.RepositoryDir, captured.Version); err != nil {
-			return fmt.Errorf("recheck local tag %q: %w", captured.Version, err)
+		if exists, err := hasLocalTag(ctx, captured.RepositoryDir, captured.Tag); err != nil {
+			return fmt.Errorf("recheck local tag %q: %w", captured.Tag, err)
 		} else if exists {
-			return fmt.Errorf("local tag %q appeared during validation", captured.Version)
+			return fmt.Errorf("local tag %q appeared during validation", captured.Tag)
 		}
 		return nil
 	}
-	object, err := gitOutput(ctx, captured.RepositoryDir, "rev-parse", "--verify", "refs/tags/"+captured.Version)
+	object, err := gitOutput(ctx, captured.RepositoryDir, "rev-parse", "--verify", "refs/tags/"+captured.Tag)
 	if err != nil {
-		return fmt.Errorf("read local tag %q: %w", captured.Version, err)
+		return fmt.Errorf("read local tag %q: %w", captured.Tag, err)
 	}
-	tagType, err := gitOutput(ctx, captured.RepositoryDir, "cat-file", "-t", "refs/tags/"+captured.Version)
+	tagType, err := gitOutput(ctx, captured.RepositoryDir, "cat-file", "-t", "refs/tags/"+captured.Tag)
 	if err != nil {
-		return fmt.Errorf("inspect local tag %q: %w", captured.Version, err)
+		return fmt.Errorf("inspect local tag %q: %w", captured.Tag, err)
 	}
 	if strings.TrimSpace(string(object)) != expectedTagObject || strings.TrimSpace(string(tagType)) != "tag" {
-		return fmt.Errorf("local tag %q no longer identifies annotated tag object %s", captured.Version, expectedTagObject)
+		return fmt.Errorf("local tag %q no longer identifies annotated tag object %s", captured.Tag, expectedTagObject)
 	}
 	return nil
 }
@@ -199,10 +225,10 @@ func gitOutput(ctx context.Context, repositoryDir string, args ...string) ([]byt
 	return stdout.Bytes(), nil
 }
 
-func hasLocalTag(ctx context.Context, repositoryDir, version string) (bool, error) {
+func hasLocalTag(ctx context.Context, repositoryDir, tag string) (bool, error) {
 	var stderr bytes.Buffer
 	err := process.Run(ctx, process.Invocation{
-		Args:   []string{"git", "show-ref", "--verify", "--quiet", "refs/tags/" + version},
+		Args:   []string{"git", "show-ref", "--verify", "--quiet", "refs/tags/" + tag},
 		Dir:    repositoryDir,
 		Stderr: &stderr,
 	})

internal/candidate/check_test.go

@@ -3,13 +3,17 @@ package candidate
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"errors"
+	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/validation"
 )
 
@@ -71,7 +75,7 @@ func TestCheckCapturesCandidateAndCallsAdditionalChecksOnce(t *testing.T) {
 	if seen != candidate {
 		t.Fatalf("callback candidate = %#v, returned candidate = %#v", seen, candidate)
 	}
-	if candidate.RepositoryDir != repository || candidate.Commit != commit || candidate.Version != testVersion {
+	if candidate.RepositoryDir != repository || candidate.ModuleDir != repository || candidate.ModulePath != "example.com/candidate" || candidate.Tag != testVersion || candidate.Commit != commit || candidate.Version != testVersion {
 		t.Fatalf("Check() candidate = %#v", candidate)
 	}
 	if tags := gitOutputForTest(t, repository, "tag", "--list"); tags != "" {
@@ -82,6 +86,67 @@ func TestCheckCapturesCandidateAndCallsAdditionalChecksOnce(t *testing.T) {
 	}
 }
 
+func TestCaptureUsesNestedMajorModuleNoteAndTag(t *testing.T) {
+	repository := newRepository(t, "# Example Product v1.2.3\n\nRoot release.\n")
+	moduleDir := "integrations/ckconfig/v2"
+	writeTestFile(t, repository, moduleDir+"/go.mod", "module example.com/ckconfig/v2\n\ngo 1.25.0\n")
+	writeTestFile(t, repository, moduleDir+"/docs/releases/v2.3.4.md", "# Example Product v2.3.4\n\nNested release.\n")
+	gitRun(t, repository, "add", moduleDir)
+	gitRun(t, repository, "commit", "-m", "add nested major module")
+
+	captured, err := Capture(context.Background(), Request{
+		RepositoryDir: repository,
+		ModuleDir:     moduleDir,
+		Product:       "Example Product",
+		Version:       "v2.3.4",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if captured.RepositoryDir != repository || captured.ModuleDir != filepath.Join(repository, moduleDir) || captured.ModulePath != "example.com/ckconfig/v2" || captured.Tag != "integrations/ckconfig/v2.3.4" {
+		t.Fatalf("nested candidate identity = %#v", captured)
+	}
+	if !strings.Contains(captured.Note, "Nested release.") || strings.Contains(captured.Note, "Root release.") {
+		t.Fatalf("captured note = %q, want nested module note", captured.Note)
+	}
+
+	gitRun(t, repository, "tag", captured.Tag)
+	conflicted, err := Capture(context.Background(), Request{
+		RepositoryDir: repository,
+		ModuleDir:     moduleDir,
+		Product:       "Example Product",
+		Version:       "v2.3.4",
+	})
+	if err == nil || !strings.Contains(err.Error(), captured.Tag) {
+		t.Fatalf("Capture() with existing nested tag returned %#v, %v", conflicted, err)
+	}
+	if conflicted.ModulePath != captured.ModulePath || conflicted.Tag != captured.Tag || conflicted.Commit != captured.Commit {
+		t.Fatalf("capture failure lost identity evidence: %#v", conflicted)
+	}
+}
+
+func TestCaptureKeepsRepositoryWideCleanlinessGuardForNestedSelection(t *testing.T) {
+	repository := newRepository(t, "# Example Product v1.2.3\n")
+	moduleDir := "integrations/ckconfig"
+	writeTestFile(t, repository, moduleDir+"/go.mod", "module example.com/ckconfig\n")
+	writeTestFile(t, repository, moduleDir+"/docs/releases/"+testVersion+".md", "# Example Product v1.2.3\n")
+	gitRun(t, repository, "add", moduleDir)
+	gitRun(t, repository, "commit", "-m", "add nested module")
+	writeTestFile(t, repository, "sibling/untracked.txt", "dirty\n")
+	captured, err := Capture(context.Background(), Request{
+		RepositoryDir: repository,
+		ModuleDir:     moduleDir,
+		Product:       "Example Product",
+		Version:       testVersion,
+	})
+	if err == nil || !strings.Contains(err.Error(), "must be clean") {
+		t.Fatalf("Capture() = %#v, %v; want repository-wide dirty-state rejection", captured, err)
+	}
+	if captured.Commit == "" {
+		t.Fatalf("dirty-state error lost captured commit: %#v", captured)
+	}
+}
+
 func TestCheckStopsBeforeProductAndBuildCallbacksWhenGoFormatFails(t *testing.T) {
 	repository := newRepository(t, "# Example Product v1.2.3\n\nRelease note.\n")
 	writeTestFile(t, repository, "unformatted.go", "package candidate\nfunc Value( ) int{return 1}\n")
@@ -98,7 +163,7 @@ func TestCheckStopsBeforeProductAndBuildCallbacksWhenGoFormatFails(t *testing.T)
 			productCalls++
 			return nil
 		},
-		AfterValidate: func(context.Context, Candidate) error {
+		AfterValidate: func(context.Context, Candidate, *gotool.Owner) error {
 			buildCalls++
 			return nil
 		},
@@ -130,7 +195,7 @@ func TestCheckStopsBeforeProductAndBuildCallbacksWhenMarkdownBoundaryFails(t *te
 			productCalls++
 			return nil
 		},
-		AfterValidate: func(context.Context, Candidate) error {
+		AfterValidate: func(context.Context, Candidate, *gotool.Owner) error {
 			buildCalls++
 			return nil
 		},
@@ -204,6 +269,147 @@ func TestCheckRunsDefaultOfflineGoValidation(t *testing.T) {
 	}
 }
 
+func TestCheckRefreshesGoSettingsAfterAdditionalChecks(t *testing.T) {
+	repository := newRepository(t, "# Example Product v1.2.3\n\nRelease note.\n")
+	t.Setenv("GOENV", "off")
+	t.Setenv("GOMODCACHE", filepath.Join(t.TempDir(), "initial-module-cache"))
+	selectedCache := filepath.Join(t.TempDir(), "callback-module-cache")
+	var observed string
+	_, err := Check(context.Background(), Request{
+		RepositoryDir: repository,
+		Product:       "Example Product",
+		Version:       testVersion,
+		AdditionalChecks: func(context.Context, Candidate) error {
+			t.Setenv("GOMODCACHE", selectedCache)
+			return nil
+		},
+		AfterValidate: func(ctx context.Context, captured Candidate, owner *gotool.Owner) error {
+			tool, err := owner.Acquire(ctx)
+			if err != nil {
+				return err
+			}
+			output, err := tool.Output(ctx, captured.ModuleDir, gotool.Native, gotool.Target{}, nil, "env", "GOMODCACHE")
+			if err != nil {
+				return err
+			}
+			observed = strings.TrimSpace(string(output))
+			return nil
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if observed != selectedCache {
+		t.Fatalf("Go settings after additional checks = %q, want %q", observed, selectedCache)
+	}
+}
+
+func TestCheckNeedsNoGoDiscoveryAfterFinalCallback(t *testing.T) {
+	repository := newRepository(t, "# Example Product v1.2.3\n\nRelease note.\n")
+	gitPath, err := exec.LookPath("git")
+	if err != nil {
+		t.Fatal(err)
+	}
+	gitOnly := t.TempDir()
+	if err := os.Symlink(gitPath, filepath.Join(gitOnly, "git")); err != nil {
+		t.Fatal(err)
+	}
+	_, err = Check(context.Background(), Request{
+		RepositoryDir: repository, Product: "Example Product", Version: testVersion,
+		AfterValidate: func(context.Context, Candidate, *gotool.Owner) error {
+			t.Setenv("PATH", gitOnly)
+			return nil
+		},
+	})
+	if err != nil {
+		t.Fatalf("completed Go work was rediscovered after final callback: %v", err)
+	}
+}
+
+func TestCheckSharesGoDiscoveryWithAfterValidateCallback(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("the controlled Go command fixture uses a POSIX shell")
+	}
+	repository := newRepository(t, "# Example Product v1.2.3\n\nRelease note.\n")
+	logPath := installCandidateGoShim(t)
+	t.Setenv("GOENV", "off")
+	_, err := Check(context.Background(), Request{
+		RepositoryDir: repository,
+		Product:       "Example Product",
+		Version:       testVersion,
+		AfterValidate: func(ctx context.Context, captured Candidate, owner *gotool.Owner) error {
+			tool, err := owner.Acquire(ctx)
+			if err != nil {
+				return err
+			}
+			_, err = tool.Output(ctx, captured.ModuleDir, gotool.Native, gotool.Target{}, nil, "version")
+			return err
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	contents, err := os.ReadFile(logPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	commands := strings.Split(strings.TrimSpace(string(contents)), "\n")
+	var discoveries, suites, callbacks int
+	for _, command := range commands {
+		switch {
+		case strings.HasPrefix(command, "env "):
+			discoveries++
+		case strings.HasPrefix(command, "test "):
+			suites++
+		case command == "version":
+			callbacks++
+		}
+	}
+	if discoveries != 2 || suites != 1 || callbacks != 1 {
+		t.Fatalf("Go invocations = %q; discovery=%d suite=%d callback=%d, want 2, 1, 1", commands, discoveries, suites, callbacks)
+	}
+}
+
+func installCandidateGoShim(t *testing.T) string {
+	t.Helper()
+	directory := t.TempDir()
+	logPath := filepath.Join(directory, "go-commands")
+	settings := map[string]string{
+		"GOHOSTOS": runtime.GOOS, "GOHOSTARCH": runtime.GOARCH, "GOENV": "off",
+		"CC": "", "CXX": "", "CGO_CFLAGS": "", "CGO_CPPFLAGS": "", "CGO_CXXFLAGS": "",
+		"CGO_ENABLED": "1", "CGO_LDFLAGS": "", "GOCACHE": "", "GOCACHEPROG": "",
+		"GOMODCACHE": "", "GOPATH": "", "GOROOT": "", "GOTMPDIR": "", "PKG_CONFIG": "",
+	}
+	encoded, err := json.Marshal(settings)
+	if err != nil {
+		t.Fatal(err)
+	}
+	script := fmt.Sprintf(`#!/bin/sh
+set -eu
+printf '%%s\n' "$*" >> "$RELEASEKIT_GO_LOG"
+if [ "${1-}" = "env" ]; then
+	printf '%%s\n' '%s'
+	exit 0
+fi
+if [ "${1-}" = "version" ]; then
+	echo 'go version fixture'
+	exit 0
+fi
+exit 0
+`, encoded)
+	shimPath := filepath.Join(directory, "go")
+	if err := os.WriteFile(shimPath, []byte(script), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	path := directory
+	if current := os.Getenv("PATH"); current != "" {
+		path += string(os.PathListSeparator) + current
+	}
+	t.Setenv("PATH", path)
+	t.Setenv("RELEASEKIT_GO_LOG", logPath)
+	return logPath
+}
+
 func TestDefaultValidationDoesNotInheritGOFLAGSRunFilter(t *testing.T) {
 	repository := newRepository(t, "# Example Product v1.2.3\n\nRelease note.\n")
 	writeTestFile(t, repository, "failure_test.go", "package candidate\nimport \"testing\"\nfunc TestExpectedFailure(t *testing.T) { t.Fatal(\"expected fixture failure\") }\n")
@@ -423,7 +629,7 @@ func TestCheckRechecksHeadAndWorktreeAfterCallback(t *testing.T) {
 
 func TestCheckRechecksLocalTagAfterCallback(t *testing.T) {
 	repository := newRepository(t, "# Example Product v1.2.3\n")
-	_, err := Check(context.Background(), Request{
+	captured, err := Check(context.Background(), Request{
 		RepositoryDir: repository,
 		Product:       "Example Product",
 		Version:       testVersion,
@@ -435,6 +641,9 @@ func TestCheckRechecksLocalTagAfterCallback(t *testing.T) {
 	if err == nil || !strings.Contains(err.Error(), "appeared during validation") {
 		t.Fatalf("Check() error = %v, want tag recheck error", err)
 	}
+	if captured.RepositoryDir != repository || captured.ModuleDir != repository || captured.ModulePath != "example.com/candidate" || captured.Tag != testVersion || captured.Commit == "" {
+		t.Fatalf("tag recheck failure lost candidate evidence: %#v", captured)
+	}
 }
 
 func validRequest(repository string) Request {

internal/delivery/assets.go

@@ -11,16 +11,17 @@ import (
 )
 
 func declaredBuildAssets(result internalbuild.Result) ([]gitea.ExpectedAsset, error) {
-	if len(result.Targets) == 0 {
+	settings := result.Settings
+	if len(settings.Targets) == 0 {
 		if len(result.Artifacts) != 0 {
 			return nil, fmt.Errorf("source-only build result contains artifacts")
 		}
 		return nil, nil
 	}
-	if len(result.Artifacts) != len(result.Targets) {
+	if len(result.Artifacts) != len(settings.Targets) {
 		return nil, fmt.Errorf("build result must contain one artifact for each selected target")
 	}
-	declarations := artifact.ExpectedBuild(result.BinaryName, result.Version, result.Targets)
+	declarations := artifact.ExpectedBuild(settings.BinaryName, result.Version, settings.Targets)
 	wantByTarget := make(map[artifact.Target]string, len(declarations))
 	for _, declaration := range declarations {
 		target := declaration.Target

internal/delivery/assets_test.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"testing"
 
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
 	internalbuild "gitea.maximumdirect.net/eric/ReleaseKit/internal/build"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gitea"
 )
@@ -25,8 +26,10 @@ func TestDeclaredBuildAssetsGenerateManifestFromBuildResult(t *testing.T) {
 		t.Fatal(err)
 	}
 	result, err := declaredBuildAssets(internalbuild.Result{
-		Version: "v1.2.3", BinaryName: "app",
-		Targets: []internalbuild.Target{{OS: "linux", Arch: "amd64"}, {OS: "darwin", Arch: "arm64"}},
+		Version: "v1.2.3",
+		Settings: artifact.NormalizeSettings("./cmd/app", "app", []artifact.Target{
+			{OS: "linux", Arch: "amd64"}, {OS: "darwin", Arch: "arm64"},
+		}),
 		Artifacts: []internalbuild.Artifact{
 			{Path: firstPath, Filename: filepath.Base(firstPath), Target: internalbuild.Target{OS: "linux", Arch: "amd64"}, SHA256: assetDigest(first)},
 			{Path: secondPath, Filename: filepath.Base(secondPath), Target: internalbuild.Target{OS: "darwin", Arch: "arm64"}, SHA256: assetDigest(second)},
@@ -54,7 +57,7 @@ func TestDeclaredBuildAssetsRejectsArtifactDeclarationMismatch(t *testing.T) {
 		t.Fatal(err)
 	}
 	_, err := declaredBuildAssets(internalbuild.Result{
-		Version: "v1.2.3", BinaryName: "app", Targets: []internalbuild.Target{{OS: "linux", Arch: "amd64"}},
+		Version: "v1.2.3", Settings: artifact.NormalizeSettings("./cmd/app", "app", []artifact.Target{{OS: "linux", Arch: "amd64"}}),
 		Artifacts: []internalbuild.Artifact{{
 			Path: path, Filename: filepath.Base(path), Target: internalbuild.Target{OS: "linux", Arch: "amd64"}, SHA256: assetDigest(contents),
 		}},

internal/delivery/delivery.go

@@ -13,6 +13,8 @@ import (
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/candidate"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gitea"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/tempdir"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
@@ -29,8 +31,10 @@ const (
 
 type Request struct {
 	RepositoryDir string
+	ModuleDir     string
 	Product       string
 	Version       string
+	ExpectedTag   string
 	Destination   gitea.Destination
 	Build         *internalbuild.Spec
 	Prebuilt      *internalbuild.Result
@@ -38,6 +42,10 @@ type Request struct {
 }
 
 type Result struct {
+	RepositoryDir   string
+	ModuleDir       string
+	ModulePath      string
+	Tag             string
 	CandidateCommit string
 	ReleaseURL      string
 	State           State
@@ -59,28 +67,49 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 	if request.Build != nil && request.Prebuilt != nil {
 		return result, errors.New("delivery cannot use both a managed build and prebuilt artifacts")
 	}
-	repositoryDir, err := filepath.Abs(request.RepositoryDir)
+	repositoryDir, err := git.RepositoryRoot(ctx, request.RepositoryDir)
 	if err != nil {
 		return result, fmt.Errorf("resolve repository directory: %w", err)
 	}
-	source, err := git.InspectTaggedSource(ctx, repositoryDir, request.Version)
-	if err != nil {
-		return result, fmt.Errorf("inspect tagged source: %w", err)
-	}
-	result.CandidateCommit = source.TagCommit
-	if source.Status != "" {
-		return result, fmt.Errorf("tagged checkout must be clean:\n%s", source.Status)
-	}
-	if source.Head != source.TagCommit {
-		return result, fmt.Errorf("checkout HEAD %s does not match tag %s commit %s", source.Head, request.Version, source.TagCommit)
-	}
-	notePath := "docs/releases/" + request.Version + ".md"
-	note, err := git.ReadCommitFile(ctx, repositoryDir, source.TagCommit, notePath)
+	result.RepositoryDir = repositoryDir
+	commit, err := git.CaptureHead(ctx, repositoryDir)
 	if err != nil {
 		return result, err
 	}
+	result.CandidateCommit = commit
+	identity, err := releaseidentity.FromCommitted(ctx, repositoryDir, request.ModuleDir, request.Version, commit)
+	result.ModuleDir = identity.ModuleDir
+	result.ModulePath = identity.ModulePath
+	result.Tag = identity.Tag
+	if err != nil {
+		return result, fmt.Errorf("resolve committed delivery identity: %w", err)
+	}
+	result.RepositoryDir = identity.RepositoryDir
+	result.ModuleDir = identity.ModuleDir
+	result.ModulePath = identity.ModulePath
+	result.Tag = identity.Tag
+	if request.ExpectedTag != "" && request.ExpectedTag != identity.Tag {
+		return result, fmt.Errorf("expected delivery tag %q does not match selected module tag %q", request.ExpectedTag, identity.Tag)
+	}
+	source, err := git.InspectTaggedSource(ctx, repositoryDir, identity.Tag)
+	if err != nil {
+		return result, fmt.Errorf("inspect tagged source: %w", err)
+	}
+	if source.Status != "" {
+		return result, fmt.Errorf("tagged checkout must be clean:\n%s", source.Status)
+	}
+	if source.Head != commit {
+		return result, fmt.Errorf("checkout HEAD changed from captured commit %s to %s", commit, source.Head)
+	}
+	if source.TagCommit != commit {
+		return result, fmt.Errorf("checkout HEAD %s does not match tag %s commit %s", source.Head, identity.Tag, source.TagCommit)
+	}
+	note, err := git.ReadCommitFile(ctx, repositoryDir, commit, identity.NotePath)
+	if err != nil {
+		return result, fmt.Errorf("read release note %q: %w", identity.NotePath, err)
+	}
 	if err := candidate.ValidateReleaseNote(note, request.Product, request.Version); err != nil {
-		return result, fmt.Errorf("release note %q: %w", notePath, err)
+		return result, fmt.Errorf("release note %q: %w", identity.NotePath, err)
 	}
 
 	build := request.Prebuilt
@@ -90,12 +119,12 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 			return result, fmt.Errorf("create temporary delivery build directory: %w", err)
 		}
 		defer os.RemoveAll(temporaryDir)
-		built, err := internalbuild.Build(ctx, internalbuild.Request{
-			RepositoryDir: repositoryDir,
-			Version:       request.Version,
-			Spec:          *request.Build,
-			OutputDir:     filepath.Join(temporaryDir, "assets"),
-			Output:        request.Output,
+		built, err := internalbuild.BuildResolved(ctx, internalbuild.Request{
+			Identity:  identity,
+			Spec:      *request.Build,
+			OutputDir: filepath.Join(temporaryDir, "assets"),
+			Output:    request.Output,
+			ToolOwner: gotool.NewOwner(identity.ModuleDir),
 		})
 		if err != nil {
 			return result, fmt.Errorf("build delivery assets: %w", err)
@@ -109,7 +138,7 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 			return result, err
 		}
 	}
-	if err := validateBuild(repositoryDir, source.TagCommit, request.Version, build, assets); err != nil {
+	if err := validateBuild(identity, commit, build, assets); err != nil {
 		return result, err
 	}
 	if len(assets) > 0 {
@@ -117,23 +146,23 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 			return result, fmt.Errorf("verify build assets: %w", err)
 		}
 	}
-	if build != nil && len(build.Targets) != 0 {
-		current, err := git.InspectTaggedSource(ctx, repositoryDir, request.Version)
+	if build != nil && len(build.Settings.Targets) != 0 {
+		current, err := git.InspectTaggedSource(ctx, repositoryDir, identity.Tag)
 		if err != nil {
 			return result, fmt.Errorf("recheck tagged source after build: %w", err)
 		}
 		if current.Status != "" {
 			return result, fmt.Errorf("tagged checkout changed during build:\n%s", current.Status)
 		}
-		if current.Head != source.TagCommit || current.TagCommit != source.TagCommit {
+		if current.Head != commit || current.TagCommit != commit {
 			return result, errors.New("tagged source changed during build")
 		}
 	}
 
 	releaseResult, err := (gitea.Client{}).EnsureRelease(ctx, gitea.Request{
 		Destination: request.Destination,
-		Version:     request.Version,
-		Commit:      source.TagCommit,
+		Tag:         identity.Tag,
+		Commit:      commit,
 		Note:        string(note),
 	})
 	if err != nil {
@@ -154,7 +183,7 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 		result.Uncertain = assetIdentities(assets)
 		return result, err
 	}
-	uploadResult, uploadErr := (gitea.Client{}).UploadMissing(ctx, request.Destination, releaseResult.Release.ID, inspection)
+	uploadResult, uploadErr := (gitea.Client{}).UploadVerifiedMissing(ctx, request.Destination, releaseResult.Release.ID, inspection)
 	result.Matching = uploadResult.Matching
 	result.Uploaded = uploadResult.Uploaded
 	result.Pending = uploadResult.Pending
@@ -167,14 +196,25 @@ func Deliver(ctx context.Context, request Request) (Result, error) {
 	return result, uploadErr
 }
 
-func validateBuild(repositoryDir, commit, version string, build *internalbuild.Result, assets []gitea.ExpectedAsset) error {
+func validateBuild(identity releaseidentity.Identity, commit string, build *internalbuild.Result, assets []gitea.ExpectedAsset) error {
 	if build == nil {
 		if len(assets) != 0 {
 			return errors.New("assets require a build identity")
 		}
 		return nil
 	}
-	if len(build.Targets) == 0 {
+	buildRepository, err := filepath.Abs(build.RepositoryDir)
+	if err != nil {
+		return fmt.Errorf("resolve build repository: %w", err)
+	}
+	buildModule, err := filepath.Abs(build.ModuleDir)
+	if err != nil {
+		return fmt.Errorf("resolve build module: %w", err)
+	}
+	if buildRepository != identity.RepositoryDir || buildModule != identity.ModuleDir || build.ModulePath != identity.ModulePath || build.Tag != identity.Tag || build.CandidateCommit != commit || build.Version != identity.Version {
+		return errors.New("build result does not identify the selected tagged module")
+	}
+	if len(build.Settings.Targets) == 0 {
 		if len(assets) != 0 {
 			return errors.New("page-only delivery cannot include binary assets")
 		}
@@ -183,14 +223,7 @@ func validateBuild(repositoryDir, commit, version string, build *internalbuild.R
 	if !build.SourceVerified {
 		return errors.New("build source was not verified as clean and unchanged during compilation")
 	}
-	buildRepository, err := filepath.Abs(build.RepositoryDir)
-	if err != nil {
-		return fmt.Errorf("resolve build repository: %w", err)
-	}
-	if buildRepository != repositoryDir || build.CandidateCommit != commit || build.Version != version {
-		return errors.New("build result does not identify the selected tagged source")
-	}
-	if strings.TrimSpace(build.MainPackage) == "" || strings.TrimSpace(build.BinaryName) == "" || len(assets) != len(build.Targets)+1 || assets[len(assets)-1].Filename != gitea.ManifestFilename {
+	if strings.TrimSpace(build.Settings.MainPackage) == "" || strings.TrimSpace(build.Settings.BinaryName) == "" || len(assets) != len(build.Settings.Targets)+1 || assets[len(assets)-1].Filename != gitea.ManifestFilename {
 		return errors.New("build result does not contain the selected artifacts and complete checksum manifest")
 	}
 	return nil

internal/delivery/performance_test.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"testing"
 
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
 	internalbuild "gitea.maximumdirect.net/eric/ReleaseKit/internal/build"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gitea"
 )
@@ -60,14 +61,13 @@ func performanceBuildResult(b *testing.B) (internalbuild.Result, int64) {
 	}
 	digest := sha256.Sum256(data)
 	result := internalbuild.Result{
-		Version:    "v1.2.3",
-		BinaryName: "releasekit",
-		Targets: []internalbuild.Target{
+		Version: "v1.2.3",
+		Settings: artifact.NormalizeSettings("./cmd/releasekit", "releasekit", []artifact.Target{
 			{OS: "linux", Arch: "amd64"},
 			{OS: "windows", Arch: "amd64"},
-		},
+		}),
 	}
-	for _, target := range result.Targets {
+	for _, target := range result.Settings.Targets {
 		name := fmt.Sprintf("releasekit-v1.2.3-%s-%s", target.OS, target.Arch)
 		if target.OS == "windows" {
 			name += ".exe"

internal/git/path.go

@@ -0,0 +1,155 @@
+package git
+
+import (
+	"context"
+	"fmt"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+// PathResolver traverses committed paths, sharing reference rules between
+// release identity and validation. Lookups include both files and directories.
+type PathResolver struct {
+	RepositoryDir string
+	Lookup        func(context.Context, string) (TreeEntry, bool, error)
+	ReadLink      func(context.Context, TreeEntry) (string, error)
+}
+
+// DestinationKind classifies a committed local destination.
+type DestinationKind string
+
+const (
+	DestinationEntry           DestinationKind = "entry"
+	DestinationDirectory       DestinationKind = "directory"
+	DestinationMissing         DestinationKind = "missing"
+	DestinationOutsideCheckout DestinationKind = "outside-checkout"
+	DestinationSubmodule       DestinationKind = "submodule"
+	DestinationSymlinkCycle    DestinationKind = "symlink-cycle"
+)
+
+// Destination records the resolved identity and its classification.
+type Destination struct {
+	Kind DestinationKind
+	Path string
+}
+
+// ResolveDestination resolves local destinations using the captured Git tree.
+// Relative destinations start at the source directory; absolute destinations
+// within the repository directory map back to committed paths.
+func (resolver PathResolver) ResolveDestination(ctx context.Context, sourcePath, destination string) (Destination, error) {
+	if err := ctx.Err(); err != nil {
+		return Destination{}, err
+	}
+	directory := path.Dir(sourcePath)
+	if path.IsAbs(destination) {
+		relative, inside, err := resolver.relativeAbsoluteDestination(destination)
+		if err != nil {
+			return Destination{}, err
+		}
+		if !inside {
+			return Destination{Kind: DestinationOutsideCheckout, Path: destination}, nil
+		}
+		directory, destination = ".", relative
+	}
+	return resolver.resolveDestination(ctx, directory, strings.Split(destination, "/"), make(map[string]bool))
+}
+
+func (resolver PathResolver) resolveDestination(ctx context.Context, directory string, components []string, active map[string]bool) (Destination, error) {
+	for index, component := range components {
+		if err := ctx.Err(); err != nil {
+			return Destination{}, err
+		}
+		remaining := components[index+1:]
+		switch component {
+		case "", ".":
+			continue
+		case "..":
+			if directory == "." {
+				return Destination{Kind: DestinationOutsideCheckout, Path: unresolvedPath("..", remaining)}, nil
+			}
+			directory = path.Dir(directory)
+			continue
+		}
+		partial := path.Join(directory, component)
+		entry, exists, err := resolver.Lookup(ctx, partial)
+		if err != nil {
+			return Destination{}, err
+		}
+		if !exists {
+			return Destination{Kind: DestinationMissing, Path: unresolvedPath(partial, remaining)}, nil
+		}
+		if entry.Type == "tree" {
+			directory = partial
+			continue
+		}
+		if entry.Mode == "160000" {
+			return Destination{Kind: DestinationSubmodule, Path: unresolvedPath(partial, remaining)}, nil
+		}
+		if entry.Mode == "120000" {
+			if active[partial] {
+				return Destination{Kind: DestinationSymlinkCycle, Path: partial}, nil
+			}
+			linkText, err := resolver.ReadLink(ctx, entry)
+			if err != nil {
+				return Destination{}, fmt.Errorf("read committed symlink %q: %w", partial, err)
+			}
+			target := linkText
+			targetDirectory := directory
+			if path.IsAbs(target) {
+				relative, inside, err := resolver.relativeAbsoluteDestination(target)
+				if err != nil {
+					return Destination{}, err
+				}
+				if !inside {
+					return Destination{Kind: DestinationOutsideCheckout, Path: unresolvedPath(target, remaining)}, nil
+				}
+				targetDirectory, target = ".", relative
+			}
+			active[partial] = true
+			destination, err := resolver.resolveDestination(ctx, targetDirectory, strings.Split(target, "/"), active)
+			delete(active, partial)
+			if err != nil || len(remaining) == 0 {
+				return destination, err
+			}
+			switch destination.Kind {
+			case DestinationDirectory:
+				return resolver.resolveDestination(ctx, destination.Path, remaining, active)
+			case DestinationEntry:
+				destination.Kind = DestinationMissing
+			case DestinationSymlinkCycle:
+				return destination, nil
+			}
+			destination.Path = unresolvedPath(destination.Path, remaining)
+			return destination, nil
+		}
+		if len(remaining) != 0 {
+			return Destination{Kind: DestinationMissing, Path: unresolvedPath(partial, remaining)}, nil
+		}
+		return Destination{Kind: DestinationEntry, Path: partial}, nil
+	}
+	return Destination{Kind: DestinationDirectory, Path: directory}, nil
+}
+
+func (resolver PathResolver) relativeAbsoluteDestination(destination string) (string, bool, error) {
+	root, err := filepath.Abs(resolver.RepositoryDir)
+	if err != nil {
+		return "", false, fmt.Errorf("resolve candidate repository directory: %w", err)
+	}
+	root = filepath.ToSlash(root)
+	if destination == root {
+		return ".", true, nil
+	}
+	// Preserve the suffix for component traversal, including symlinks before '..'.
+	relative, inside := strings.CutPrefix(destination, strings.TrimSuffix(root, "/")+"/")
+	return relative, inside, nil
+}
+
+// unresolvedPath preserves components that could not be traversed. Cleaning
+// them would hide missing entries, non-directories, or checkout boundaries.
+func unresolvedPath(base string, remaining []string) string {
+	if len(remaining) == 0 {
+		return base
+	}
+	return base + "/" + strings.Join(remaining, "/")
+}

internal/git/prepare.go

@@ -8,30 +8,51 @@ import (
 
 // PrepareTaggedCheckout fetches one explicit tag ref, checks its peeled commit
 // against expectedCommit, and checks out that commit detached.
-func PrepareTaggedCheckout(ctx context.Context, repositoryDir, version, remote, expectedCommit string) error {
-	if !validVersionRef(version) || !validObjectID(expectedCommit) {
-		return fmt.Errorf("invalid tagged checkout identity %q at %q", expectedCommit, version)
+func PrepareTaggedCheckout(ctx context.Context, repositoryDir, tag, remote, expectedCommit string) error {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return err
 	}
-	ref := "refs/tags/" + version
+	if !validObjectID(expectedCommit) {
+		return fmt.Errorf("invalid tagged checkout commit %q for tag %q", expectedCommit, tag)
+	}
+	ref := "refs/tags/" + tag
 	if _, err := run(ctx, repositoryDir, nil, "fetch", "--no-tags", remote, ref+":"+ref); err != nil {
-		return fmt.Errorf("fetch tag %s from remote %s: %w", version, remote, err)
+		return fmt.Errorf("fetch tag %s from remote %s: %w", tag, remote, err)
 	}
-	source, err := InspectTaggedSource(ctx, repositoryDir, version)
+	source, err := InspectTaggedSource(ctx, repositoryDir, tag)
 	if err != nil {
 		return err
 	}
 	if !strings.EqualFold(source.TagCommit, expectedCommit) {
-		return fmt.Errorf("tag %s resolves to commit %s, expected %s", version, source.TagCommit, expectedCommit)
+		return fmt.Errorf("tag %s resolves to commit %s, expected %s", tag, source.TagCommit, expectedCommit)
 	}
 	if _, err := run(ctx, repositoryDir, nil, "checkout", "--detach", source.TagCommit); err != nil {
-		return fmt.Errorf("check out tag %s at %s: %w", version, source.TagCommit, err)
+		return fmt.Errorf("check out tag %s at %s: %w", tag, source.TagCommit, err)
 	}
-	head, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", "HEAD^{commit}")
+	return VerifyTaggedCheckout(ctx, repositoryDir, tag, expectedCommit)
+}
+
+// VerifyTaggedCheckout confirms that the existing local tag, HEAD, and clean
+// worktree all identify the expected commit. It does not fetch or check out.
+func VerifyTaggedCheckout(ctx context.Context, repositoryDir, tag, expectedCommit string) error {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return err
+	}
+	if !validObjectID(expectedCommit) {
+		return fmt.Errorf("invalid tagged checkout commit %q for tag %q", expectedCommit, tag)
+	}
+	source, err := InspectTaggedSource(ctx, repositoryDir, tag)
 	if err != nil {
-		return fmt.Errorf("verify prepared checkout HEAD: %w", err)
+		return err
 	}
-	if !strings.EqualFold(strings.TrimSpace(head), expectedCommit) {
-		return fmt.Errorf("prepared checkout HEAD is %s, expected %s", strings.TrimSpace(head), expectedCommit)
+	if source.Status != "" {
+		return fmt.Errorf("tagged checkout must be clean:\n%s", source.Status)
+	}
+	if !strings.EqualFold(source.TagCommit, expectedCommit) {
+		return fmt.Errorf("tag %s resolves to commit %s, expected %s", tag, source.TagCommit, expectedCommit)
+	}
+	if !strings.EqualFold(source.Head, expectedCommit) {
+		return fmt.Errorf("checkout HEAD is %s, expected %s", source.Head, expectedCommit)
 	}
 	return nil
 }

internal/git/remote.go

@@ -18,7 +18,7 @@ var (
 	ErrEndpointChanged       = errors.New("Git publication endpoint changed")
 	ErrRemoteMainMissing     = errors.New("authoritative remote has no main branch")
 	ErrRemoteMainConflict    = errors.New("authoritative main does not identify the candidate commit")
-	ErrRemoteTagConflict     = errors.New("version tag already exists on the authoritative remote")
+	ErrRemoteTagConflict     = errors.New("tag already exists on the authoritative remote")
 	ErrRemoteStateUnreadable = errors.New("authoritative remote state is unreadable")
 )
 
@@ -50,7 +50,7 @@ type RemoteRef struct {
 	Peeled string
 }
 
-// Snapshot is the result of querying refs/heads/main and one exact version tag.
+// Snapshot is the result of querying refs/heads/main and one exact tag.
 type Snapshot struct {
 	Main RemoteRef
 	Tag  RemoteRef
@@ -97,14 +97,14 @@ func (endpoint Endpoint) Recheck(ctx context.Context, repositoryDir string) erro
 	return endpoint.verifyScopedURLs(ctx, repositoryDir)
 }
 
-// Query reads exact main and version-tag refs. A command failure is unreadable,
+// Query reads exact main and tag refs. A command failure is unreadable,
 // never evidence that a ref is absent.
-func (endpoint Endpoint) Query(ctx context.Context, repositoryDir, version string) (Snapshot, error) {
-	if !validVersionRef(version) {
-		return Snapshot{}, fmt.Errorf("invalid version tag name %q", version)
+func (endpoint Endpoint) Query(ctx context.Context, repositoryDir, tag string) (Snapshot, error) {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return Snapshot{}, err
 	}
 	mainRef := "refs/heads/main"
-	tagRef := "refs/tags/" + version
+	tagRef := "refs/tags/" + tag
 	peeledRef := tagRef + "^{}"
 	output, err := run(ctx, repositoryDir, endpoint.scopedConfig(), "ls-remote", endpoint.ScopedName, mainRef, tagRef, peeledRef)
 	if err != nil {
@@ -112,7 +112,7 @@ func (endpoint Endpoint) Query(ctx context.Context, repositoryDir, version strin
 		return snapshot, fmt.Errorf("%w: query authoritative refs at %s: %w", ErrRemoteStateUnreadable, endpoint.PushURL, err)
 	}
 	main := RemoteRef{State: RefAbsent}
-	tag := RemoteRef{State: RefAbsent}
+	remoteTag := RemoteRef{State: RefAbsent}
 	for _, line := range strings.Split(strings.TrimSuffix(output, "\n"), "\n") {
 		if line == "" {
 			continue
@@ -125,19 +125,19 @@ func (endpoint Endpoint) Query(ctx context.Context, repositoryDir, version strin
 		case mainRef:
 			main = mergeRef(main, object, false)
 		case tagRef:
-			tag = mergeRef(tag, object, false)
+			remoteTag = mergeRef(remoteTag, object, false)
 		case peeledRef:
-			tag = mergeRef(tag, object, true)
+			remoteTag = mergeRef(remoteTag, object, true)
 		}
 	}
-	return Snapshot{Main: main, Tag: tag}, nil
+	return Snapshot{Main: main, Tag: remoteTag}, nil
 }
 
-// RequireCandidate requires exact main equality and an absent remote version
+// RequireCandidate requires exact main equality and an absent remote
 // tag. It deliberately does not accept a main branch that merely contains the
 // candidate as an ancestor.
-func (endpoint Endpoint) RequireCandidate(ctx context.Context, repositoryDir, version, commit string) (Snapshot, error) {
-	snapshot, err := endpoint.Query(ctx, repositoryDir, version)
+func (endpoint Endpoint) RequireCandidate(ctx context.Context, repositoryDir, tag, commit string) (Snapshot, error) {
+	snapshot, err := endpoint.Query(ctx, repositoryDir, tag)
 	if err != nil {
 		return snapshot, err
 	}
@@ -294,25 +294,14 @@ func mergeRef(ref RemoteRef, object string, peeled bool) RemoteRef {
 	return ref
 }
 
-func validVersionRef(version string) bool {
-	if len(version) < 6 || !strings.HasPrefix(version, "v") {
-		return false
+func checkTagRef(ctx context.Context, repositoryDir, tag string) error {
+	if tag == "" {
+		return fmt.Errorf("invalid Git tag name %q", tag)
 	}
-	parts := strings.Split(version[1:], ".")
-	if len(parts) != 3 {
-		return false
+	if _, err := run(ctx, repositoryDir, nil, "check-ref-format", "refs/tags/"+tag); err != nil {
+		return fmt.Errorf("invalid Git tag name %q: %w", tag, err)
 	}
-	for _, part := range parts {
-		if part == "" || (len(part) > 1 && part[0] == '0') {
-			return false
-		}
-		for _, char := range part {
-			if char < '0' || char > '9' {
-				return false
-			}
-		}
-	}
-	return true
+	return nil
 }
 
 func validObjectID(object string) bool {

internal/git/remote_test.go

@@ -42,6 +42,32 @@ func TestResolveUsesPushURLAndQueriesWithoutMutation(t *testing.T) {
 	}
 }
 
+func TestRemoteTagOperationsAcceptSlashContainingRefs(t *testing.T) {
+	fixture := newRemoteFixture(t)
+	endpoint, err := Resolve(context.Background(), fixture.work, "origin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	tag := "integrations/check/v1.2.3"
+	if _, err := endpoint.RequireCandidate(context.Background(), fixture.work, tag, fixture.commit); err != nil {
+		t.Fatalf("RequireCandidate(%q): %v", tag, err)
+	}
+	object, err := CreateAnnotatedTag(context.Background(), fixture.work, tag, fixture.commit, []byte("release note\n"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := endpoint.PushTag(context.Background(), fixture.work, tag, object); err != nil {
+		t.Fatal(err)
+	}
+	remote, err := endpoint.QueryTag(context.Background(), fixture.work, tag)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if remote.State != RefPresent || remote.Object != object || remote.Peeled != fixture.commit {
+		t.Fatalf("remote tag = %#v", remote)
+	}
+}
+
 func TestResolveAppliesGitURLRewrites(t *testing.T) {
 	for _, kind := range []string{"insteadOf", "pushInsteadOf"} {
 		t.Run(kind, func(t *testing.T) {

internal/git/source.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"path"
+	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -30,11 +31,43 @@ type TaggedSource struct {
 	TagObjectType string
 }
 
+// RepositoryRoot resolves the containing checkout, including independent
+// worktrees and directories reached through filesystem aliases.
+func RepositoryRoot(ctx context.Context, directory string) (string, error) {
+	if directory == "" {
+		directory = "."
+	}
+	root, err := run(ctx, directory, nil, "rev-parse", "--show-toplevel")
+	if err != nil {
+		return "", fmt.Errorf("resolve Git repository root: %w", err)
+	}
+	root = strings.TrimSuffix(root, "\n")
+	resolved, err := filepath.EvalSymlinks(root)
+	if err != nil {
+		return "", fmt.Errorf("resolve Git repository directory: %w", err)
+	}
+	return resolved, nil
+}
+
+// CaptureHead records the checkout commit before identity derived from files
+// in that commit is inspected.
+func CaptureHead(ctx context.Context, repositoryDir string) (string, error) {
+	head, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", "HEAD^{commit}")
+	if err != nil {
+		return "", fmt.Errorf("read checkout HEAD: %w", err)
+	}
+	head = strings.TrimSpace(head)
+	if !validObjectID(head) {
+		return "", fmt.Errorf("Git returned an invalid checkout commit %q", head)
+	}
+	return head, nil
+}
+
 // InspectTaggedSource reads the local HEAD, worktree state, and selected tag.
 // Both lightweight historical tags and annotated tags are supported.
-func InspectTaggedSource(ctx context.Context, repositoryDir, version string) (TaggedSource, error) {
-	if !validVersionRef(version) {
-		return TaggedSource{}, fmt.Errorf("invalid tag version %q", version)
+func InspectTaggedSource(ctx context.Context, repositoryDir, tag string) (TaggedSource, error) {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return TaggedSource{}, err
 	}
 	var source TaggedSource
 	head, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", "HEAD^{commit}")
@@ -50,10 +83,10 @@ func InspectTaggedSource(ctx context.Context, repositoryDir, version string) (Ta
 		return TaggedSource{}, fmt.Errorf("inspect tagged checkout state: %w", err)
 	}
 	source.Status = strings.TrimSpace(status)
-	ref := "refs/tags/" + version
+	ref := "refs/tags/" + tag
 	object, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", ref)
 	if err != nil {
-		return TaggedSource{}, fmt.Errorf("read local tag %s: %w", version, err)
+		return TaggedSource{}, fmt.Errorf("read local tag %s: %w", tag, err)
 	}
 	source.TagObject = strings.TrimSpace(object)
 	if !validObjectID(source.TagObject) {
@@ -61,7 +94,7 @@ func InspectTaggedSource(ctx context.Context, repositoryDir, version string) (Ta
 	}
 	peeled, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", ref+"^{commit}")
 	if err != nil {
-		return TaggedSource{}, fmt.Errorf("resolve local tag %s to a commit: %w", version, err)
+		return TaggedSource{}, fmt.Errorf("resolve local tag %s to a commit: %w", tag, err)
 	}
 	source.TagCommit = strings.TrimSpace(peeled)
 	if !validObjectID(source.TagCommit) {
@@ -69,11 +102,11 @@ func InspectTaggedSource(ctx context.Context, repositoryDir, version string) (Ta
 	}
 	tagType, err := run(ctx, repositoryDir, nil, "cat-file", "-t", ref)
 	if err != nil {
-		return TaggedSource{}, fmt.Errorf("inspect local tag %s: %w", version, err)
+		return TaggedSource{}, fmt.Errorf("inspect local tag %s: %w", tag, err)
 	}
 	source.TagObjectType = strings.TrimSpace(tagType)
 	if source.TagObjectType != "tag" && source.TagObjectType != "commit" {
-		return TaggedSource{}, fmt.Errorf("local tag %s has unsupported object type %q", version, source.TagObjectType)
+		return TaggedSource{}, fmt.Errorf("local tag %s has unsupported object type %q", tag, source.TagObjectType)
 	}
 	return source, nil
 }
@@ -83,15 +116,56 @@ func ReadCommitFile(ctx context.Context, repositoryDir, commit, name string) ([]
 	if !validObjectID(commit) || name == "" || path.IsAbs(name) || path.Clean(name) != name || strings.HasPrefix(name, "../") || name == ".." || strings.Contains(name, "\\") {
 		return nil, fmt.Errorf("invalid committed file identity %q at %q", name, commit)
 	}
-	content, err := run(ctx, repositoryDir, nil, "show", commit+":"+name)
+	content, err := readLocalObjects(ctx, repositoryDir, nil, "show", commit+":"+name)
 	if err != nil {
 		return nil, fmt.Errorf("read committed file %q: %w", name, err)
 	}
-	return []byte(content), nil
+	return content, nil
 }
 
-// ReadTree enumerates all entries in a commit and records blob sizes. Paths
-// are NUL-delimited by Git so whitespace in a filename is preserved.
+// CommittedPaths resolves individual paths from captured objects. It requests
+// only metadata and link contents needed for traversal.
+func CommittedPaths(repositoryDir, commit string) PathResolver {
+	metadata := make(map[string]TreeEntry)
+	return PathResolver{
+		RepositoryDir: repositoryDir,
+		Lookup: func(ctx context.Context, name string) (TreeEntry, bool, error) {
+			if err := ctx.Err(); err != nil {
+				return TreeEntry{}, false, err
+			}
+			if entry, seen := metadata[name]; seen {
+				return entry, entry.ObjectID != "", nil
+			}
+			if !validObjectID(commit) || name == "" || path.IsAbs(name) || path.Clean(name) != name || name == ".." || strings.HasPrefix(name, "../") {
+				return TreeEntry{}, false, fmt.Errorf("invalid committed path identity %q at %q", name, commit)
+			}
+			output, err := readLocalObjects(ctx, repositoryDir, nil, "--literal-pathspecs", "ls-tree", "-z", "--full-tree", commit, "--", name)
+			if err != nil {
+				return TreeEntry{}, false, fmt.Errorf("inspect committed path %q: %w", name, err)
+			}
+			entries, err := parseTreeEntries(output)
+			if err != nil {
+				return TreeEntry{}, false, err
+			}
+			for _, entry := range entries {
+				if entry.Path == name {
+					metadata[name] = entry
+					return entry, true, nil
+				}
+			}
+			metadata[name] = TreeEntry{}
+			return TreeEntry{}, false, nil
+		},
+		ReadLink: func(ctx context.Context, entry TreeEntry) (string, error) {
+			contents, err := ReadBlob(ctx, repositoryDir, entry.ObjectID)
+			return string(contents), err
+		},
+	}
+}
+
+// ReadTree enumerates path, type, mode, and object metadata for a commit.
+// Blob sizes and contents are inspected separately. Paths are NUL-delimited
+// by Git so whitespace in a filename is preserved.
 func ReadTree(ctx context.Context, repositoryDir, commit string) ([]TreeEntry, error) {
 	if !validObjectID(commit) {
 		return nil, fmt.Errorf("invalid commit object ID %q", commit)
@@ -104,9 +178,6 @@ func ReadTree(ctx context.Context, repositoryDir, commit string) ([]TreeEntry, e
 	if err != nil {
 		return nil, fmt.Errorf("parse committed tree %s: %w", commit, err)
 	}
-	if err := populateBlobSizes(ctx, repositoryDir, entries); err != nil {
-		return nil, fmt.Errorf("read committed blob sizes for %s: %w", commit, err)
-	}
 	return entries, nil
 }
 
@@ -150,11 +221,16 @@ func parseTreeEntries(output []byte) ([]TreeEntry, error) {
 	return entries, nil
 }
 
-func populateBlobSizes(ctx context.Context, repositoryDir string, entries []TreeEntry) error {
+// PopulateBlobSizes fills unknown sizes for the supplied blob entries using
+// local objects. Callers select the entries whose sizes their check needs.
+func PopulateBlobSizes(ctx context.Context, repositoryDir string, entries []TreeEntry) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
 	var blobIndexes []int
 	var input strings.Builder
 	for index := range entries {
-		if entries[index].Type != "blob" {
+		if entries[index].Type != "blob" || entries[index].HasSize {
 			continue
 		}
 		blobIndexes = append(blobIndexes, index)
@@ -177,7 +253,7 @@ func populateBlobSizes(ctx context.Context, repositoryDir string, entries []Tree
 		fields := strings.Fields(line)
 		entry := &entries[blobIndexes[index]]
 		if len(fields) == 2 && fields[0] == entry.ObjectID && fields[1] == "missing" {
-			return fmt.Errorf("committed blob %s is unavailable locally", entry.ObjectID)
+			return fmt.Errorf("committed blob %s for %q is unavailable locally", entry.ObjectID, entry.Path)
 		}
 		if len(fields) != 3 || fields[0] != entry.ObjectID || fields[1] != "blob" {
 			return fmt.Errorf("unexpected blob size record %q", line)

internal/git/source_test.go

@@ -32,6 +32,37 @@ func TestInspectTaggedSourceSupportsLightweightAndAnnotatedTags(t *testing.T) {
 	}
 }
 
+func TestTagOperationsAcceptFullSlashContainingRefs(t *testing.T) {
+	fixture := newRemoteFixture(t)
+	tag := "integrations/check/v2.3.4"
+	if err := checkTagRef(context.Background(), fixture.work, tag); err != nil {
+		t.Fatalf("checkTagRef(%q): %v", tag, err)
+	}
+	object, err := CreateAnnotatedTag(context.Background(), fixture.work, tag, fixture.commit, []byte("release note\n"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := InspectLocalTag(context.Background(), fixture.work, tag, object); err != nil {
+		t.Fatal(err)
+	}
+	source, err := InspectTaggedSource(context.Background(), fixture.work, tag)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if source.TagCommit != fixture.commit || source.TagObject != object || source.TagObjectType != "tag" {
+		t.Fatalf("source for %q = %#v", tag, source)
+	}
+}
+
+func TestTagReferenceValidationUsesGitRules(t *testing.T) {
+	fixture := newRemoteFixture(t)
+	for _, tag := range []string{"", "v1..2.3", "v1.2.3.lock", "v1.2.3/", "v1.2.3\\bad"} {
+		if err := checkTagRef(context.Background(), fixture.work, tag); err == nil {
+			t.Errorf("checkTagRef(%q) succeeded", tag)
+		}
+	}
+}
+
 func TestCandidateObjectReadsStayLocalInPartialClones(t *testing.T) {
 	fixture := newRemoteFixture(t)
 	gitRun(t, fixture.work, "config", "uploadpack.allowFilter", "true")
@@ -54,8 +85,23 @@ func TestCandidateObjectReadsStayLocalInPartialClones(t *testing.T) {
 			t.Setenv("RELEASEKIT_GIT_ATTEMPTS", attempts)
 			t.Setenv("GIT_NO_LAZY_FETCH", "0")
 			t.Setenv("GIT_ALLOW_PROTOCOL", "ssh")
-			if _, err := ReadTree(t.Context(), repository, fixture.commit); err == nil {
-				t.Fatal("tree inspection succeeded with unavailable objects")
+			entries, treeErr := ReadTree(t.Context(), repository, fixture.commit)
+			if filter == "tree:0" {
+				if treeErr == nil {
+					t.Fatal("tree inspection succeeded with unavailable trees")
+				}
+			} else {
+				if treeErr != nil {
+					t.Fatalf("metadata inspection required unavailable blobs: %v", treeErr)
+				}
+				if err := PopulateBlobSizes(t.Context(), repository, entries); err == nil {
+					t.Fatal("size inspection succeeded with unavailable blobs")
+				}
+			}
+			_, fileErr := ReadCommitFile(t.Context(), repository, fixture.commit, "source.txt")
+			var fileExitError *exec.ExitError
+			if !errors.As(fileErr, &fileExitError) {
+				t.Fatalf("committed file error %v lost its Git process cause", fileErr)
 			}
 			_, err := ReadBlob(t.Context(), repository, blob)
 			var exitError *exec.ExitError

internal/git/tag.go

@@ -10,9 +10,9 @@ import (
 
 // CreateAnnotatedTag records the captured note as an unsigned annotated tag
 // on the captured commit and returns the tag object's ID.
-func CreateAnnotatedTag(ctx context.Context, repositoryDir, version, commit string, note []byte) (string, error) {
-	if !validVersionRef(version) {
-		return "", fmt.Errorf("invalid version tag name %q", version)
+func CreateAnnotatedTag(ctx context.Context, repositoryDir, tag, commit string, note []byte) (string, error) {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return "", err
 	}
 	if !validObjectID(commit) {
 		return "", fmt.Errorf("invalid candidate commit object ID %q", commit)
@@ -30,64 +30,67 @@ func CreateAnnotatedTag(ctx context.Context, repositoryDir, version, commit stri
 	if err := message.Close(); err != nil {
 		return "", fmt.Errorf("close temporary release note: %w", err)
 	}
-	if _, err := run(ctx, repositoryDir, []string{"tag.gpgSign=false"}, "tag", "--annotate", "--cleanup=verbatim", "--file", messagePath, version, commit); err != nil {
-		return "", fmt.Errorf("create annotated tag %s: %w", version, err)
+	if _, err := run(ctx, repositoryDir, []string{"tag.gpgSign=false"}, "tag", "--annotate", "--cleanup=verbatim", "--file", messagePath, tag, commit); err != nil {
+		return "", fmt.Errorf("create annotated tag %s: %w", tag, err)
 	}
 
-	ref := "refs/tags/" + version
+	ref := "refs/tags/" + tag
 	tagType, err := run(ctx, repositoryDir, nil, "cat-file", "-t", ref)
 	if err != nil {
-		return "", fmt.Errorf("inspect created tag %s: %w", version, err)
+		return "", fmt.Errorf("inspect created tag %s: %w", tag, err)
 	}
 	if strings.TrimSpace(tagType) != "tag" {
-		return "", fmt.Errorf("created tag %s has object type %q, want tag", version, strings.TrimSpace(tagType))
+		return "", fmt.Errorf("created tag %s has object type %q, want tag", tag, strings.TrimSpace(tagType))
 	}
 	tagObject, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", ref)
 	if err != nil {
-		return "", fmt.Errorf("read created tag object %s: %w", version, err)
+		return "", fmt.Errorf("read created tag object %s: %w", tag, err)
 	}
 	tagObject = strings.TrimSpace(tagObject)
 	if !validObjectID(tagObject) {
-		return "", fmt.Errorf("created tag %s has invalid object ID %q", version, tagObject)
+		return "", fmt.Errorf("created tag %s has invalid object ID %q", tag, tagObject)
 	}
 	peeled, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", ref+"^{}")
 	if err != nil {
-		return "", fmt.Errorf("read peeled commit for tag %s: %w", version, err)
+		return "", fmt.Errorf("read peeled commit for tag %s: %w", tag, err)
 	}
 	if strings.TrimSpace(peeled) != commit {
-		return "", fmt.Errorf("created tag %s peels to %s, want candidate %s", version, strings.TrimSpace(peeled), commit)
+		return "", fmt.Errorf("created tag %s peels to %s, want candidate %s", tag, strings.TrimSpace(peeled), commit)
 	}
 	tagContents, err := run(ctx, repositoryDir, nil, "cat-file", "tag", ref)
 	if err != nil {
-		return "", fmt.Errorf("read annotated tag %s: %w", version, err)
+		return "", fmt.Errorf("read annotated tag %s: %w", tag, err)
 	}
 	separator := bytes.Index([]byte(tagContents), []byte("\n\n"))
 	if separator < 0 || !bytes.Equal([]byte(tagContents[separator+2:]), note) {
-		return "", fmt.Errorf("annotated tag %s message does not match the captured release note", version)
+		return "", fmt.Errorf("annotated tag %s message does not match the captured release note", tag)
 	}
 	return tagObject, nil
 }
 
 // InspectLocalTag confirms the selected tag still points to the exact
 // annotated tag object captured before publication.
-func InspectLocalTag(ctx context.Context, repositoryDir, version, expectedObject string) error {
-	if !validVersionRef(version) || !validObjectID(expectedObject) {
-		return fmt.Errorf("invalid expected tag identity %q at %q", expectedObject, version)
+func InspectLocalTag(ctx context.Context, repositoryDir, tag, expectedObject string) error {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return err
 	}
-	ref := "refs/tags/" + version
+	if !validObjectID(expectedObject) {
+		return fmt.Errorf("invalid expected tag object identity %q at %q", expectedObject, tag)
+	}
+	ref := "refs/tags/" + tag
 	tagType, err := run(ctx, repositoryDir, nil, "cat-file", "-t", ref)
 	if err != nil {
-		return fmt.Errorf("inspect local tag %s: %w", version, err)
+		return fmt.Errorf("inspect local tag %s: %w", tag, err)
 	}
 	if strings.TrimSpace(tagType) != "tag" {
-		return fmt.Errorf("local tag %s has type %q, want annotated tag", version, strings.TrimSpace(tagType))
+		return fmt.Errorf("local tag %s has type %q, want annotated tag", tag, strings.TrimSpace(tagType))
 	}
 	object, err := run(ctx, repositoryDir, nil, "rev-parse", "--verify", ref)
 	if err != nil {
-		return fmt.Errorf("read local tag %s: %w", version, err)
+		return fmt.Errorf("read local tag %s: %w", tag, err)
 	}
 	if strings.TrimSpace(object) != expectedObject {
-		return fmt.Errorf("local tag %s identifies %s, want %s", version, strings.TrimSpace(object), expectedObject)
+		return fmt.Errorf("local tag %s identifies %s, want %s", tag, strings.TrimSpace(object), expectedObject)
 	}
 	return nil
 }
@@ -95,18 +98,18 @@ func InspectLocalTag(ctx context.Context, repositoryDir, version, expectedObject
 // QueryTag verifies the captured endpoint still resolves to itself, then reads
 // one exact authoritative version tag and its peeled commit. Failed
 // verification or reads are unreadable and never interpreted as absence.
-func (endpoint Endpoint) QueryTag(ctx context.Context, repositoryDir, version string) (RemoteRef, error) {
-	if !validVersionRef(version) {
-		return RemoteRef{}, fmt.Errorf("invalid version tag name %q", version)
+func (endpoint Endpoint) QueryTag(ctx context.Context, repositoryDir, tag string) (RemoteRef, error) {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return RemoteRef{}, err
 	}
 	if err := endpoint.verifyScopedURLs(ctx, repositoryDir); err != nil {
 		return RemoteRef{State: RefUnreadable}, fmt.Errorf("%w: verify authoritative endpoint before tag query: %w", ErrRemoteStateUnreadable, err)
 	}
-	ref := "refs/tags/" + version
+	ref := "refs/tags/" + tag
 	peeledRef := ref + "^{}"
 	output, err := run(ctx, repositoryDir, endpoint.scopedConfig(), "ls-remote", endpoint.ScopedName, ref, peeledRef)
 	if err != nil {
-		return RemoteRef{State: RefUnreadable}, fmt.Errorf("%w: query authoritative tag %s at %s: %w", ErrRemoteStateUnreadable, version, endpoint.PushURL, err)
+		return RemoteRef{State: RefUnreadable}, fmt.Errorf("%w: query authoritative tag %s at %s: %w", ErrRemoteStateUnreadable, tag, endpoint.PushURL, err)
 	}
 	remoteTag := RemoteRef{State: RefAbsent}
 	for _, line := range outputLines(output) {
@@ -125,13 +128,16 @@ func (endpoint Endpoint) QueryTag(ctx context.Context, repositoryDir, version st
 }
 
 // PushTag publishes only the captured tag object to its exact tag ref.
-func (endpoint Endpoint) PushTag(ctx context.Context, repositoryDir, version, tagObject string) error {
-	if !validVersionRef(version) || !validObjectID(tagObject) {
-		return fmt.Errorf("invalid tag publication identity %q at %q", tagObject, version)
+func (endpoint Endpoint) PushTag(ctx context.Context, repositoryDir, tag, tagObject string) error {
+	if err := checkTagRef(ctx, repositoryDir, tag); err != nil {
+		return err
 	}
-	refspec := tagObject + ":refs/tags/" + version
+	if !validObjectID(tagObject) {
+		return fmt.Errorf("invalid tag publication object %q at %q", tagObject, tag)
+	}
+	refspec := tagObject + ":refs/tags/" + tag
 	if _, err := run(ctx, repositoryDir, endpoint.scopedConfig(), "push", "--no-follow-tags", "--porcelain", endpoint.ScopedName, refspec); err != nil {
-		return fmt.Errorf("push annotated tag %s to %s: %w", version, endpoint.PushURL, err)
+		return fmt.Errorf("push annotated tag %s to %s: %w", tag, endpoint.PushURL, err)
 	}
 	return nil
 }

internal/gitea/assets_test.go

@@ -47,7 +47,8 @@ func TestInspectAssetsAcceptsMatchingContentAndPreservesUnrelatedFiles(t *testin
 		case "/files/notes":
 			_, _ = w.Write([]byte("unrelated"))
 		default:
-			t.Fatalf("unexpected path %s", r.URL.Path)
+			t.Errorf("unexpected path %s", r.URL.Path)
+			return
 		}
 	}))
 	defer server.Close()
@@ -107,7 +108,8 @@ func TestInspectAssetsAcceptsFullManifestWhenBinariesAreMissing(t *testing.T) {
 			return
 		}
 		if r.URL.Path != "/files/manifest" {
-			t.Fatalf("unexpected path %s", r.URL.Path)
+			t.Errorf("unexpected path %s", r.URL.Path)
+			return
 		}
 		_, _ = w.Write(manifest.Content)
 	}))
@@ -237,7 +239,8 @@ func TestInspectAssetsFollowsSameOriginRedirectWithAuthorization(t *testing.T) {
 			_, _ = w.Write(content)
 			return
 		}
-		t.Fatalf("unexpected path %s", r.URL.Path)
+		t.Errorf("unexpected path %s", r.URL.Path)
+		return
 	}))
 	defer server.Close()
 	inspection, err := testClient(server).InspectAssets(context.Background(), testDestination(server.URL), 10, []ExpectedAsset{expected})
@@ -253,9 +256,9 @@ func TestInspectAssetsVerifiesExternalContentWithoutGiteaToken(t *testing.T) {
 	for _, mode := range []string{"direct", "redirect", "conflicting"} {
 		t.Run(mode, func(t *testing.T) {
 			expected := assetFor("app.bin", []byte("matching bytes"))
-			externalGets := 0
+			var externalGets atomic.Int64
 			external := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				externalGets++
+				externalGets.Add(1)
 				if r.Header.Get("Authorization") != "" {
 					t.Error("Gitea token reached external host")
 				}
@@ -287,8 +290,8 @@ func TestInspectAssetsVerifiesExternalContentWithoutGiteaToken(t *testing.T) {
 			if mode == "conflicting" {
 				want = AssetConflicting
 			}
-			if inspection.Assets[0].State != want || externalGets != 1 {
-				t.Fatalf("inspection=%#v downloads=%d", inspection, externalGets)
+			if inspection.Assets[0].State != want || externalGets.Load() != 1 {
+				t.Fatalf("inspection=%#v downloads=%d", inspection, externalGets.Load())
 			}
 		})
 	}

internal/gitea/release.go

@@ -11,8 +11,6 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
-
-	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
 )
 
 type FailureKind string
@@ -59,7 +57,7 @@ type Destination struct {
 
 type Request struct {
 	Destination Destination
-	Version     string
+	Tag         string
 	Commit      string
 	Note        string
 }
@@ -122,17 +120,17 @@ func (c Client) EnsureRelease(ctx context.Context, request Request) (Result, err
 	}
 	client := c.httpClient()
 	apiRoot := strings.TrimRight(base.String(), "/") + "/api/v1/repos/" + url.PathEscape(request.Destination.Owner) + "/" + url.PathEscape(request.Destination.Repository)
-	tagURL := apiRoot + "/tags/" + url.PathEscape(request.Version)
+	tagURL := apiRoot + "/tags/" + url.PathEscape(request.Tag)
 
 	var tag tagResponse
 	if err := c.getJSON(ctx, client, request.Destination.Token, "get hosted tag", tagURL, &tag); err != nil {
 		return Result{}, err
 	}
 	if tag.Commit.SHA != request.Commit {
-		return Result{}, failure(FailureConflict, "verify hosted tag", 0, fmt.Errorf("tag %q targets %q, want %q", request.Version, tag.Commit.SHA, request.Commit))
+		return Result{}, failure(FailureConflict, "verify hosted tag", 0, fmt.Errorf("tag %q targets %q, want %q", request.Tag, tag.Commit.SHA, request.Commit))
 	}
 
-	releaseURL := apiRoot + "/releases/tags/" + url.PathEscape(request.Version)
+	releaseURL := apiRoot + "/releases/tags/" + url.PathEscape(request.Tag)
 	existing, status, err := c.getRelease(ctx, client, request.Destination.Token, releaseURL)
 	if err == nil {
 		return acceptExisting(existing, request)
@@ -143,7 +141,7 @@ func (c Client) EnsureRelease(ctx context.Context, request Request) (Result, err
 
 	title := noteTitle(request.Note)
 	body, err := json.Marshal(createReleaseRequest{
-		TagName: request.Version, TargetCommitish: request.Commit,
+		TagName: request.Tag, TargetCommitish: request.Commit,
 		Name: title, Body: request.Note,
 	})
 	if err != nil {
@@ -272,8 +270,8 @@ func (c Client) httpClient() *http.Client {
 }
 
 func validateRequest(request Request) error {
-	if !versioncontract.ValidStableVersion(request.Version) {
-		return failure(FailureInvalid, "validate request", 0, errors.New("stable version is required"))
+	if strings.TrimSpace(request.Tag) == "" {
+		return failure(FailureInvalid, "validate request", 0, errors.New("full release tag is required"))
 	}
 	if !validObjectID(request.Commit) {
 		return failure(FailureInvalid, "validate request", 0, errors.New("source commit must be a lowercase Git object ID"))
@@ -305,14 +303,14 @@ func parseBaseURL(raw string) (*url.URL, error) {
 }
 
 func acceptExisting(release Release, request Request) (Result, error) {
-	if release.TagName != request.Version || release.Body != request.Note || release.Draft || release.Prerelease {
+	if release.TagName != request.Tag || release.Body != request.Note || release.Draft || release.Prerelease {
 		return Result{}, failure(FailureConflict, "verify existing release", 0, errors.New("existing release does not match the committed note and stable tag"))
 	}
 	return Result{Release: release}, nil
 }
 
 func acceptCreated(release Release, request Request) (Result, error) {
-	if release.ID <= 0 || release.TagName != request.Version || release.Body != request.Note || release.Title != noteTitle(request.Note) || release.Draft || release.Prerelease {
+	if release.ID <= 0 || release.TagName != request.Tag || release.Body != request.Note || release.Title != noteTitle(request.Note) || release.Draft || release.Prerelease {
 		return Result{}, failure(FailureMalformed, "verify created release", 0, errors.New("created release response does not match the requested stable release"))
 	}
 	return Result{Release: release, Created: true}, nil

internal/gitea/release_test.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
+	"sync/atomic"
 	"testing"
 )
 
@@ -26,6 +27,49 @@ func TestEnsureReleaseFindsMatchingReleaseAndPreservesTitle(t *testing.T) {
 	}
 }
 
+func TestEnsureReleaseEscapesSlashContainingTag(t *testing.T) {
+	tag := "integrations/ckconfig/v1.2.3"
+	state := &fixtureState{}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		assertAuth(t, r)
+		switch r.URL.EscapedPath() {
+		case "/api/v1/repos/owner/project/tags/integrations%2Fckconfig%2Fv1.2.3":
+			assertRequest(t, r, http.MethodGet, r.URL.Path)
+			writeTag(t, w, testCommit)
+		case "/api/v1/repos/owner/project/releases/tags/integrations%2Fckconfig%2Fv1.2.3":
+			assertRequest(t, r, http.MethodGet, r.URL.Path)
+			http.NotFound(w, r)
+		case "/api/v1/repos/owner/project/releases":
+			assertRequest(t, r, http.MethodPost, r.URL.Path)
+			state.posts.Add(1)
+			var payload createReleaseRequest
+			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+				t.Error(err)
+				return
+			}
+			if payload.TagName != tag || payload.Name != "Example v1.2.3" || payload.Body != testNote {
+				t.Errorf("create payload = %#v", payload)
+				return
+			}
+			if err := json.NewEncoder(w).Encode(releaseResponse{ID: 7, HTMLURL: "https://example.test/release", TagName: tag, TargetCommitish: testCommit, Name: payload.Name, Body: payload.Body}); err != nil {
+				t.Error(err)
+				return
+			}
+		default:
+			t.Errorf("unexpected escaped request %s %s", r.Method, r.URL.EscapedPath())
+			return
+		}
+	}))
+	defer server.Close()
+
+	request := testRequest(server.URL)
+	request.Tag = tag
+	result, err := testClient(server).EnsureRelease(context.Background(), request)
+	if err != nil || !result.Created || state.posts.Load() != 1 {
+		t.Fatalf("nested tag release = %#v, posts %d, error %v", result, state.posts.Load(), err)
+	}
+}
+
 func TestEnsureReleaseCreatesMissingPageFromCommittedNote(t *testing.T) {
 	server, _ := newReleaseServer(t, releaseFixture{}, true)
 	result, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
@@ -43,7 +87,7 @@ func TestEnsureReleaseConflictDoesNotEditExistingPage(t *testing.T) {
 	if failureKind(t, err) != FailureConflict {
 		t.Fatalf("error = %v", err)
 	}
-	if got := state.posts; got != 0 {
+	if got := state.posts.Load(); got != 0 {
 		t.Fatalf("release creates = %d, want 0", got)
 	}
 }
@@ -64,68 +108,68 @@ func TestEnsureReleaseUnauthorizedIsStructuredAndHidesToken(t *testing.T) {
 }
 
 func TestEnsureReleaseMalformedTagResponseStopsBeforeCreate(t *testing.T) {
-	posts := 0
+	var posts atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method == http.MethodPost {
-			posts++
+			posts.Add(1)
 		}
 		assertRequest(t, r, http.MethodGet, "/api/v1/repos/owner/project/tags/v1.2.3")
 		_, _ = w.Write([]byte("{"))
 	}))
 	defer server.Close()
 	_, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
-	if failureKind(t, err) != FailureMalformed || posts != 0 {
-		t.Fatalf("error = %v, posts = %d", err, posts)
+	if failureKind(t, err) != FailureMalformed || posts.Load() != 0 {
+		t.Fatalf("error = %v, posts = %d", err, posts.Load())
 	}
 }
 
 func TestEnsureReleaseWrongHostedTagStopsBeforeCreate(t *testing.T) {
-	posts := 0
+	var posts atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assertRequest(t, r, http.MethodGet, "/api/v1/repos/owner/project/tags/v1.2.3")
 		if r.Method == http.MethodPost {
-			posts++
+			posts.Add(1)
 		}
 		_, _ = fmt.Fprintf(w, `{"commit":{"sha":"%040d"}}`, 7)
 	}))
 	defer server.Close()
 	_, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
-	if failureKind(t, err) != FailureConflict || posts != 0 {
-		t.Fatalf("error = %v, posts = %d", err, posts)
+	if failureKind(t, err) != FailureConflict || posts.Load() != 0 {
+		t.Fatalf("error = %v, posts = %d", err, posts.Load())
 	}
 }
 
 func TestEnsureReleaseMissingHostedTagStopsBeforeCreate(t *testing.T) {
-	posts := 0
+	var posts atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assertRequest(t, r, http.MethodGet, "/api/v1/repos/owner/project/tags/v1.2.3")
 		if r.Method == http.MethodPost {
-			posts++
+			posts.Add(1)
 		}
 		http.NotFound(w, r)
 	}))
 	defer server.Close()
 	_, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
-	if failureKind(t, err) != FailureNotFound || posts != 0 {
-		t.Fatalf("error = %v, posts = %d", err, posts)
+	if failureKind(t, err) != FailureNotFound || posts.Load() != 0 {
+		t.Fatalf("error = %v, posts = %d", err, posts.Load())
 	}
 }
 
 func TestEnsureReleaseHonorsContextCancellation(t *testing.T) {
-	called := false
-	server := httptest.NewServer(http.HandlerFunc(func(http.ResponseWriter, *http.Request) { called = true }))
+	var called atomic.Bool
+	server := httptest.NewServer(http.HandlerFunc(func(http.ResponseWriter, *http.Request) { called.Store(true) }))
 	defer server.Close()
 	ctx, cancel := context.WithCancel(context.Background())
 	cancel()
 	_, err := testClient(server).EnsureRelease(ctx, testRequest(server.URL))
-	if !errors.Is(err, context.Canceled) || called {
-		t.Fatalf("error = %v, server called = %t", err, called)
+	if !errors.Is(err, context.Canceled) || called.Load() {
+		t.Fatalf("error = %v, server called = %t", err, called.Load())
 	}
 }
 
 func TestEnsureReleaseResolvesLostCreateAcknowledgmentWithOneLookup(t *testing.T) {
-	created := false
-	lookups := 0
+	var created atomic.Bool
+	var lookups atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assertAuth(t, r)
 		switch r.URL.Path {
@@ -134,8 +178,8 @@ func TestEnsureReleaseResolvesLostCreateAcknowledgmentWithOneLookup(t *testing.T
 			writeTag(t, w, testCommit)
 		case "/api/v1/repos/owner/project/releases/tags/v1.2.3":
 			assertRequest(t, r, http.MethodGet, r.URL.Path)
-			lookups++
-			if !created {
+			lookups.Add(1)
+			if !created.Load() {
 				http.NotFound(w, r)
 				return
 			}
@@ -144,23 +188,28 @@ func TestEnsureReleaseResolvesLostCreateAcknowledgmentWithOneLookup(t *testing.T
 			assertRequest(t, r, http.MethodPost, r.URL.Path)
 			var payload createReleaseRequest
 			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-				t.Fatal(err)
+				t.Error(err)
+				return
 			}
 			if payload.TagName != "v1.2.3" || payload.TargetCommitish != testCommit || payload.Name != "Example v1.2.3" || payload.Body != testNote || payload.Draft || payload.Prerelease {
-				t.Fatalf("create payload = %#v", payload)
+				t.Errorf("create payload = %#v", payload)
+				return
 			}
-			created = true
+			created.Store(true)
 			hijacker, ok := w.(http.Hijacker)
 			if !ok {
-				t.Fatal("HTTP writer does not support hijacking")
+				t.Error("HTTP writer does not support hijacking")
+				return
 			}
 			connection, _, err := hijacker.Hijack()
 			if err != nil {
-				t.Fatal(err)
+				t.Error(err)
+				return
 			}
 			_ = connection.Close()
 		default:
-			t.Fatalf("unexpected request %s %s", r.Method, r.URL.Path)
+			t.Errorf("unexpected request %s %s", r.Method, r.URL.Path)
+			return
 		}
 	}))
 	defer server.Close()
@@ -168,13 +217,13 @@ func TestEnsureReleaseResolvesLostCreateAcknowledgmentWithOneLookup(t *testing.T
 	if err != nil {
 		t.Fatal(err)
 	}
-	if result.Created || lookups != 2 {
-		t.Fatalf("result = %#v, release lookups = %d", result, lookups)
+	if result.Created || lookups.Load() != 2 {
+		t.Fatalf("result = %#v, release lookups = %d", result, lookups.Load())
 	}
 }
 
 func TestEnsureReleaseResolvesCreateConflictWithOneLookup(t *testing.T) {
-	lookups := 0
+	var lookups atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assertAuth(t, r)
 		switch r.URL.Path {
@@ -183,8 +232,8 @@ func TestEnsureReleaseResolvesCreateConflictWithOneLookup(t *testing.T) {
 			writeTag(t, w, testCommit)
 		case "/api/v1/repos/owner/project/releases/tags/v1.2.3":
 			assertRequest(t, r, http.MethodGet, r.URL.Path)
-			lookups++
-			if lookups == 1 {
+			lookups.Add(1)
+			if lookups.Load() == 1 {
 				http.NotFound(w, r)
 				return
 			}
@@ -193,7 +242,8 @@ func TestEnsureReleaseResolvesCreateConflictWithOneLookup(t *testing.T) {
 			assertRequest(t, r, http.MethodPost, r.URL.Path)
 			w.WriteHeader(http.StatusConflict)
 		default:
-			t.Fatalf("unexpected request %s %s", r.Method, r.URL.Path)
+			t.Errorf("unexpected request %s %s", r.Method, r.URL.Path)
+			return
 		}
 	}))
 	defer server.Close()
@@ -201,13 +251,13 @@ func TestEnsureReleaseResolvesCreateConflictWithOneLookup(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if result.Created || result.Release.Title != "Created by another request" || lookups != 2 {
-		t.Fatalf("result = %#v, release lookups = %d", result, lookups)
+	if result.Created || result.Release.Title != "Created by another request" || lookups.Load() != 2 {
+		t.Fatalf("result = %#v, release lookups = %d", result, lookups.Load())
 	}
 }
 
 func TestEnsureReleaseReportsUnknownWhenAmbiguousCreateCannotBeInspected(t *testing.T) {
-	lookups := 0
+	var lookups atomic.Int64
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assertAuth(t, r)
 		switch r.URL.Path {
@@ -216,8 +266,8 @@ func TestEnsureReleaseReportsUnknownWhenAmbiguousCreateCannotBeInspected(t *test
 			writeTag(t, w, testCommit)
 		case "/api/v1/repos/owner/project/releases/tags/v1.2.3":
 			assertRequest(t, r, http.MethodGet, r.URL.Path)
-			lookups++
-			if lookups == 1 {
+			lookups.Add(1)
+			if lookups.Load() == 1 {
 				http.NotFound(w, r)
 				return
 			}
@@ -226,13 +276,14 @@ func TestEnsureReleaseReportsUnknownWhenAmbiguousCreateCannotBeInspected(t *test
 			assertRequest(t, r, http.MethodPost, r.URL.Path)
 			w.WriteHeader(http.StatusInternalServerError)
 		default:
-			t.Fatalf("unexpected request %s %s", r.Method, r.URL.Path)
+			t.Errorf("unexpected request %s %s", r.Method, r.URL.Path)
+			return
 		}
 	}))
 	defer server.Close()
 	_, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
-	if failureKind(t, err) != FailureUnknown || lookups != 2 {
-		t.Fatalf("error = %v, release lookups = %d", err, lookups)
+	if failureKind(t, err) != FailureUnknown || lookups.Load() != 2 {
+		t.Fatalf("error = %v, release lookups = %d", err, lookups.Load())
 	}
 }
 
@@ -243,7 +294,7 @@ type releaseFixture struct {
 	pre   bool
 }
 
-type fixtureState struct{ posts int }
+type fixtureState struct{ posts atomic.Int64 }
 
 func newReleaseServer(t *testing.T, existing releaseFixture, createMissing bool) (*httptest.Server, *fixtureState) {
 	t.Helper()
@@ -263,13 +314,15 @@ func newReleaseServer(t *testing.T, existing releaseFixture, createMissing bool)
 			writeRelease(t, w, existing)
 		case "/api/v1/repos/owner/project/releases":
 			assertRequest(t, r, http.MethodPost, r.URL.Path)
-			state.posts++
+			state.posts.Add(1)
 			var payload createReleaseRequest
 			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-				t.Fatal(err)
+				t.Error(err)
+				return
 			}
 			if payload.TagName != "v1.2.3" || payload.TargetCommitish != testCommit || payload.Name != "Example v1.2.3" || payload.Body != testNote || payload.Draft || payload.Prerelease {
-				t.Fatalf("create payload = %#v", payload)
+				t.Errorf("create payload = %#v", payload)
+				return
 			}
 			if !createMissing {
 				w.WriteHeader(http.StatusConflict)
@@ -277,10 +330,12 @@ func newReleaseServer(t *testing.T, existing releaseFixture, createMissing bool)
 			}
 			writeRelease(t, w, releaseFixture{title: payload.Name})
 		default:
-			t.Fatalf("unexpected request %s %s", r.Method, r.URL.Path)
+			t.Errorf("unexpected request %s %s", r.Method, r.URL.Path)
+			return
 		}
 	})
 	server := httptest.NewServer(handler)
+	t.Cleanup(server.Close)
 	return server, state
 }
 
@@ -307,7 +362,8 @@ func (fixture releaseFixture) bodyOrDefault() string {
 func assertRequest(t *testing.T, request *http.Request, method, path string) {
 	t.Helper()
 	if request.Method != method || request.URL.Path != path {
-		t.Fatalf("request = %s %s, want %s %s", request.Method, request.URL.Path, method, path)
+		t.Errorf("request = %s %s, want %s %s", request.Method, request.URL.Path, method, path)
+		return
 	}
 	assertAuth(t, request)
 }
@@ -315,7 +371,8 @@ func assertRequest(t *testing.T, request *http.Request, method, path string) {
 func assertAuth(t *testing.T, request *http.Request) {
 	t.Helper()
 	if got := request.Header.Get("Authorization"); got != "token "+testToken {
-		t.Fatalf("Authorization = %q", got)
+		t.Errorf("Authorization = %q", got)
+		return
 	}
 }
 
@@ -324,7 +381,7 @@ func testClient(server *httptest.Server) Client {
 }
 
 func testRequest(baseURL string) Request {
-	return Request{Destination: Destination{BaseURL: baseURL, Owner: "owner", Repository: "project", Token: testToken}, Version: "v1.2.3", Commit: testCommit, Note: testNote}
+	return Request{Destination: Destination{BaseURL: baseURL, Owner: "owner", Repository: "project", Token: testToken}, Tag: "v1.2.3", Commit: testCommit, Note: testNote}
 }
 
 func failureKind(t *testing.T, err error) FailureKind {
@@ -343,14 +400,14 @@ func contains(value, substring string) bool {
 func TestEnsureReleaseReconcilesInconsistentSuccessfulCreate(t *testing.T) {
 	for _, mode := range []string{"matching", "conflicting", "unavailable"} {
 		t.Run(mode, func(t *testing.T) {
-			posts, lookups := 0, 0
+			var posts, lookups atomic.Int64
 			server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 				switch {
 				case strings.Contains(r.URL.Path, "/tags/") && !strings.Contains(r.URL.Path, "/releases/"):
 					writeTag(t, w, testCommit)
 				case strings.Contains(r.URL.Path, "/releases/tags/"):
-					lookups++
-					if posts == 0 {
+					lookups.Add(1)
+					if posts.Load() == 0 {
 						http.NotFound(w, r)
 						return
 					}
@@ -364,7 +421,7 @@ func TestEnsureReleaseReconcilesInconsistentSuccessfulCreate(t *testing.T) {
 					}
 					writeRelease(t, w, releaseFixture{title: "Example v1.2.3", body: body})
 				case r.Method == http.MethodPost:
-					posts++
+					posts.Add(1)
 					w.WriteHeader(http.StatusCreated)
 					json.NewEncoder(w).Encode(releaseResponse{ID: 10, TagName: "v1.2.3", Name: "inconsistent title", Body: testNote})
 				default:
@@ -373,8 +430,8 @@ func TestEnsureReleaseReconcilesInconsistentSuccessfulCreate(t *testing.T) {
 			}))
 			defer server.Close()
 			result, err := testClient(server).EnsureRelease(context.Background(), testRequest(server.URL))
-			if posts != 1 || lookups != 2 {
-				t.Fatalf("posts=%d lookups=%d", posts, lookups)
+			if posts.Load() != 1 || lookups.Load() != 2 {
+				t.Fatalf("posts=%d lookups=%d", posts.Load(), lookups.Load())
 			}
 			switch mode {
 			case "matching":

internal/gitea/upload.go

@@ -68,6 +68,17 @@ func VerifyLocalAssets(assets []ExpectedAsset) error {
 // before the first write if any declared existing asset conflicts or cannot be
 // verified, and never replaces an existing attachment.
 func (c Client) UploadMissing(ctx context.Context, destination Destination, releaseID int64, inspection Inspection) (UploadResult, error) {
+	return c.uploadMissing(ctx, destination, releaseID, inspection, true)
+}
+
+// UploadVerifiedMissing uploads missing assets whose local contents have already
+// passed VerifyLocalAssets. It reuses that verification while retaining remote
+// inspection, conflict handling, and upload reconciliation.
+func (c Client) UploadVerifiedMissing(ctx context.Context, destination Destination, releaseID int64, inspection Inspection) (UploadResult, error) {
+	return c.uploadMissing(ctx, destination, releaseID, inspection, false)
+}
+
+func (c Client) uploadMissing(ctx context.Context, destination Destination, releaseID int64, inspection Inspection, verifyLocal bool) (UploadResult, error) {
 	if releaseID <= 0 {
 		return UploadResult{State: DeliveryPartial}, failure(FailureInvalid, "upload release assets", 0, errors.New("release ID must be positive"))
 	}
@@ -127,12 +138,14 @@ func (c Client) UploadMissing(ctx context.Context, destination Destination, rele
 			missing[observation.Expected.Filename] = observation.Expected
 		}
 	}
-	for _, item := range expected {
-		if _, needsUpload := missing[item.Filename]; !needsUpload {
-			continue
-		}
-		if err := verifyLocalAsset(item); err != nil {
-			return result, err
+	if verifyLocal {
+		for _, item := range expected {
+			if _, needsUpload := missing[item.Filename]; !needsUpload {
+				continue
+			}
+			if err := verifyLocalAsset(item); err != nil {
+				return result, err
+			}
 		}
 	}
 

internal/gitea/upload_test.go

@@ -15,6 +15,31 @@ import (
 	"testing"
 )
 
+func TestUploadMissingVerifiesEveryMissingLocalFileBeforeWriting(t *testing.T) {
+	fixture := &uploadFixture{files: make(map[string][]byte)}
+	server := httptest.NewServer(fixture)
+	defer server.Close()
+	client := testClient(server)
+	destination := testDestination(server.URL)
+	assets := localAssets(t, []string{"alpha.bin", "beta.bin"})
+	inspection, err := client.InspectAssets(t.Context(), destination, 10, assets)
+	if err != nil {
+		t.Fatal(err)
+	}
+	contents := readExpectedFile(t, assets[1])
+	contents[0] ^= 0xff
+	if err := os.WriteFile(assets[1].Path, contents, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	result, err := client.UploadMissing(t.Context(), destination, 10, inspection)
+	if err == nil || result.State != DeliveryPartial {
+		t.Fatalf("upload = %#v, error = %v; want local verification failure", result, err)
+	}
+	if posts := fixture.postNames(); len(posts) != 0 {
+		t.Fatalf("uploaded %v before rejecting local content", posts)
+	}
+}
+
 func TestUploadMissingPartialFailureThenRerunOnlyMissingAssets(t *testing.T) {
 	fixture := &uploadFixture{files: make(map[string][]byte), failName: "beta.bin"}
 	server := httptest.NewServer(fixture)

internal/gotool/gotool.go

@@ -34,8 +34,9 @@ type Target struct {
 // Tool holds the host target and effective operational settings resolved from
 // the process environment and Go's persistent environment file.
 type Tool struct {
-	host     Target
-	settings map[string]string
+	host         Target
+	settings     map[string]string
+	settingsFile string
 }
 
 var operationalSettings = []string{
@@ -53,10 +54,11 @@ var architectureFeatures = []string{
 // configuration from being read.
 func New(ctx context.Context, directory string) (*Tool, error) {
 	var host struct {
-		OS   string `json:"GOHOSTOS"`
-		Arch string `json:"GOHOSTARCH"`
+		OS           string `json:"GOHOSTOS"`
+		Arch         string `json:"GOHOSTARCH"`
+		SettingsFile string `json:"GOENV"`
 	}
-	output, err := discover(ctx, directory, discoveryEnvironment(), "go", "env", "-json", "GOHOSTOS", "GOHOSTARCH")
+	output, err := discover(ctx, directory, discoveryEnvironment(), "go", "env", "-json", "GOHOSTOS", "GOHOSTARCH", "GOENV")
 	if err != nil {
 		return nil, fmt.Errorf("identify Go host: %w", err)
 	}
@@ -66,7 +68,7 @@ func New(ctx context.Context, directory string) (*Tool, error) {
 	if host.OS == "" || host.Arch == "" {
 		return nil, fmt.Errorf("Go returned an incomplete host target: %s", strings.TrimSpace(string(output)))
 	}
-	tool := &Tool{host: Target{OS: host.OS, Arch: host.Arch}}
+	tool := &Tool{host: Target{OS: host.OS, Arch: host.Arch}, settingsFile: host.SettingsFile}
 
 	environment := discoveryEnvironment()
 	environment["GOOS"] = tool.host.OS

internal/gotool/gotool_test.go

@@ -301,6 +301,84 @@ func TestPersistentSettingsPreserveCachesAndNativeCTools(t *testing.T) {
 	}
 }
 
+func TestOwnerReusesSettingsUntilInheritedEnvironmentChanges(t *testing.T) {
+	clearGoSettings(t)
+	t.Setenv("GOENV", "off")
+	owner := NewOwner(t.TempDir())
+
+	first, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	second, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if first != second {
+		t.Fatal("unchanged Go inputs caused settings discovery to be repeated")
+	}
+
+	cache := filepath.Join(t.TempDir(), "changed-cache")
+	t.Setenv("GOCACHE", cache)
+	third, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if third == first || third.settings["GOCACHE"] != cache {
+		t.Fatalf("changed inherited environment kept stale settings: tool=%p GOCACHE=%q", third, third.settings["GOCACHE"])
+	}
+}
+
+func TestOwnerAcceptsGoConfigurationWithoutReadableSnapshot(t *testing.T) {
+	clearGoSettings(t)
+	t.Setenv("GOENV", t.TempDir())
+	directory := t.TempDir()
+	if _, err := New(context.Background(), directory); err != nil {
+		t.Fatalf("underlying Go discovery rejected fixture: %v", err)
+	}
+	owner := NewOwner(directory)
+	first, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatalf("owner added a snapshot prerequisite: %v", err)
+	}
+	second, err := owner.Acquire(context.Background())
+	if err != nil || first == second {
+		t.Fatalf("unavailable snapshot should rediscover on demand: first=%p second=%p error=%v", first, second, err)
+	}
+}
+
+func TestOwnerRefreshesWhenPersistentSettingsChange(t *testing.T) {
+	clearGoSettings(t)
+	firstCache := filepath.Join(t.TempDir(), "first-cache")
+	secondCache := filepath.Join(t.TempDir(), "second-cache")
+	settingsFile := filepath.Join(t.TempDir(), "go-env")
+	writeSettings := func(cache string) {
+		t.Helper()
+		if err := os.WriteFile(settingsFile, []byte("GOCACHE="+cache+"\n"), 0o600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	writeSettings(firstCache)
+	t.Setenv("GOENV", settingsFile)
+	owner := NewOwner(t.TempDir())
+
+	first, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if first.settings["GOCACHE"] != firstCache {
+		t.Fatalf("initial GOCACHE = %q, want %q", first.settings["GOCACHE"], firstCache)
+	}
+	writeSettings(secondCache)
+	second, err := owner.Acquire(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if second == first || second.settings["GOCACHE"] != secondCache {
+		t.Fatalf("changed persistent settings were not rediscovered: tool=%p GOCACHE=%q", second, second.settings["GOCACHE"])
+	}
+}
+
 func readSettings(t *testing.T, tool *Tool, mode Mode, target Target, names ...string) map[string]string {
 	t.Helper()
 	args := append([]string{"env", "-json"}, names...)

internal/gotool/owner.go

@@ -0,0 +1,122 @@
+package gotool
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// Owner lazily discovers and reuses one Go tool while its inherited
+// environment and persistent settings file remain unchanged.
+type Owner struct {
+	directory         string
+	tool              *Tool
+	env               map[string]string
+	file              string
+	contents          []byte
+	fileFound         bool
+	snapshotAvailable bool
+}
+
+// NewOwner creates an operation-local Go tool owner without running Go.
+func NewOwner(directory string) *Owner {
+	return &Owner{directory: directory}
+}
+
+// Acquire returns the operation's Go tool, rediscovering settings when their
+// process or persistent inputs have changed.
+func (owner *Owner) Acquire(ctx context.Context) (*Tool, error) {
+	if owner.tool != nil && owner.snapshotAvailable {
+		changed, err := owner.inputsChanged()
+		if err == nil && !changed {
+			return owner.tool, nil
+		}
+	}
+	if err := owner.discover(ctx); err != nil {
+		return nil, err
+	}
+	return owner.tool, nil
+}
+
+func (owner *Owner) discover(ctx context.Context) error {
+	environment := inheritedEnvironment()
+	tool, err := New(ctx, owner.directory)
+	if err != nil {
+		return err
+	}
+	settingsFile, snapshotErr := resolveSettingsFile(owner.directory, tool.settingsFile)
+	var contents []byte
+	var found bool
+	if snapshotErr == nil {
+		contents, found, snapshotErr = readSettingsFile(settingsFile)
+	}
+	owner.tool = tool
+	owner.env = environment
+	owner.file = settingsFile
+	owner.contents = contents
+	owner.fileFound = found
+	owner.snapshotAvailable = snapshotErr == nil
+	return nil
+}
+
+func (owner *Owner) inputsChanged() (bool, error) {
+	if !sameEnvironment(owner.env, inheritedEnvironment()) {
+		return true, nil
+	}
+	contents, found, err := readSettingsFile(owner.file)
+	if err != nil {
+		return true, err
+	}
+	return found != owner.fileFound || !bytes.Equal(contents, owner.contents), nil
+}
+
+func inheritedEnvironment() map[string]string {
+	values := make(map[string]string)
+	for _, entry := range os.Environ() {
+		key, value, ok := strings.Cut(entry, "=")
+		if ok {
+			values[key] = value
+		}
+	}
+	return values
+}
+
+func sameEnvironment(left, right map[string]string) bool {
+	if len(left) != len(right) {
+		return false
+	}
+	for key, value := range left {
+		other, ok := right[key]
+		if !ok || other != value {
+			return false
+		}
+	}
+	return true
+}
+
+func resolveSettingsFile(directory, filename string) (string, error) {
+	if filename == "" || filename == "off" {
+		return "", nil
+	}
+	if !filepath.IsAbs(filename) {
+		filename = filepath.Join(directory, filename)
+	}
+	return filepath.Abs(filename)
+}
+
+func readSettingsFile(filename string) ([]byte, bool, error) {
+	if filename == "" {
+		return nil, false, nil
+	}
+	contents, err := os.ReadFile(filename)
+	if errors.Is(err, os.ErrNotExist) {
+		return nil, false, nil
+	}
+	if err != nil {
+		return nil, false, err
+	}
+	return contents, true, nil
+}

internal/preparation/preparation.go

@@ -16,28 +16,34 @@ import (
 
 type TaggedCheckoutRequest struct {
 	RepositoryDir  string
-	Version        string
+	Tag            string
 	Remote         string
 	ExpectedCommit string
+	VerifyOnly     bool
 }
 
 func PrepareTaggedCheckout(ctx context.Context, request TaggedCheckoutRequest) error {
-	if !versioncontract.ValidStableVersion(request.Version) {
-		return fmt.Errorf("%w: %q", candidate.ErrInvalidVersion, request.Version)
+	lastSlash := strings.LastIndex(request.Tag, "/")
+	version := request.Tag[lastSlash+1:]
+	if !versioncontract.ValidStableVersion(version) {
+		return fmt.Errorf("%w: tag %q must end in a stable semantic version", candidate.ErrInvalidVersion, request.Tag)
 	}
 	if strings.TrimSpace(request.ExpectedCommit) == "" {
 		return errors.New("expected commit is required")
 	}
+	if request.VerifyOnly {
+		return git.VerifyTaggedCheckout(ctx, request.RepositoryDir, request.Tag, request.ExpectedCommit)
+	}
 	remote := request.Remote
 	if remote == "" {
 		remote = "origin"
 	}
-	return git.PrepareTaggedCheckout(ctx, request.RepositoryDir, request.Version, remote, request.ExpectedCommit)
+	return git.PrepareTaggedCheckout(ctx, request.RepositoryDir, request.Tag, remote, request.ExpectedCommit)
 }
 
-func PrepareBuildDependencies(ctx context.Context, repositoryDir string) error {
-	if strings.TrimSpace(repositoryDir) == "" {
-		return errors.New("repository directory is required")
+func PrepareBuildDependencies(ctx context.Context, moduleDir string) error {
+	if strings.TrimSpace(moduleDir) == "" {
+		return errors.New("module directory is required")
 	}
-	return gotool.PrepareBuildDependencies(ctx, repositoryDir)
+	return gotool.PrepareBuildDependencies(ctx, moduleDir)
 }

internal/publish/publish.go

@@ -10,6 +10,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/candidate"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/validation"
 )
 
@@ -42,17 +43,22 @@ var ErrUnexpectedPushURL = errors.New("unexpected publication push URL")
 
 type Request struct {
 	RepositoryDir    string
+	ModuleDir        string
 	Product          string
 	Version          string
 	Remote           string
 	ExpectedPushURL  string
 	Validation       validation.Settings
 	AdditionalChecks func(context.Context, candidate.Candidate) error
-	AfterValidate    func(context.Context, candidate.Candidate) error
+	AfterValidate    func(context.Context, candidate.Candidate, *gotool.Owner) error
 	Output           io.Writer
 }
 
 type Result struct {
+	RepositoryDir   string
+	ModuleDir       string
+	ModulePath      string
+	Tag             string
 	Version         string
 	CandidateCommit string
 	Endpoint        string
@@ -76,6 +82,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 	}
 	checks := candidate.Request{
 		RepositoryDir:    request.RepositoryDir,
+		ModuleDir:        request.ModuleDir,
 		Product:          request.Product,
 		Version:          request.Version,
 		Validation:       request.Validation,
@@ -83,10 +90,14 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 		Output:           request.Output,
 	}
 	captured, err := candidate.Capture(ctx, checks)
+	result.RepositoryDir = captured.RepositoryDir
+	result.ModuleDir = captured.ModuleDir
+	result.ModulePath = captured.ModulePath
+	result.Tag = captured.Tag
+	result.CandidateCommit = captured.Commit
 	if err != nil {
 		return result, fmt.Errorf("capture release candidate: %w", err)
 	}
-	result.CandidateCommit = captured.Commit
 
 	endpoint, err := git.Resolve(ctx, captured.RepositoryDir, remoteName)
 	if err != nil {
@@ -99,7 +110,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 	if err := endpoint.Recheck(ctx, captured.RepositoryDir); err != nil {
 		return result, fmt.Errorf("pre-validation endpoint guard: %w", err)
 	}
-	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Version, captured.Commit); err != nil {
+	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Tag, captured.Commit); err != nil {
 		if isRemoteConflict(err) {
 			result.State = Conflict
 		}
@@ -110,12 +121,14 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 	}
 
 	result.Phase = Validation
+	checks.ToolOwner = gotool.NewOwner(captured.ModuleDir)
 	if err := candidate.Validate(ctx, checks, captured); err != nil {
 		return result, err
 	}
 	if request.AfterValidate != nil {
-		if err := request.AfterValidate(ctx, captured); err != nil {
-			return result, fmt.Errorf("after candidate validation: %w", err)
+		callbackErr := request.AfterValidate(ctx, captured, checks.ToolOwner)
+		if callbackErr != nil {
+			return result, fmt.Errorf("after candidate validation: %w", callbackErr)
 		}
 	}
 	if err := candidate.Recheck(ctx, captured, ""); err != nil {
@@ -124,7 +137,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 	if err := endpoint.Recheck(ctx, captured.RepositoryDir); err != nil {
 		return result, fmt.Errorf("pre-publication endpoint guard: %w", err)
 	}
-	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Version, captured.Commit); err != nil {
+	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Tag, captured.Commit); err != nil {
 		if isRemoteConflict(err) {
 			result.State = Conflict
 		}
@@ -133,7 +146,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 
 	result.Phase = TagCreation
 	result.State = NotPublished
-	tagObject, err := git.CreateAnnotatedTag(ctx, captured.RepositoryDir, captured.Version, captured.Commit, []byte(captured.Note))
+	tagObject, err := git.CreateAnnotatedTag(ctx, captured.RepositoryDir, captured.Tag, captured.Commit, []byte(captured.Note))
 	if err != nil {
 		return result, err
 	}
@@ -144,7 +157,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 	if err := endpoint.Recheck(ctx, captured.RepositoryDir); err != nil {
 		return result, fmt.Errorf("pre-push endpoint guard: %w", err)
 	}
-	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Version, captured.Commit); err != nil {
+	if _, err := endpoint.RequireCandidate(ctx, captured.RepositoryDir, captured.Tag, captured.Commit); err != nil {
 		if isRemoteConflict(err) {
 			result.State = Conflict
 		}
@@ -153,7 +166,7 @@ func Publish(ctx context.Context, request Request) (Result, error) {
 
 	result.Phase = Push
 	result.State = Unknown
-	if err := endpoint.PushTag(ctx, captured.RepositoryDir, captured.Version, tagObject); err != nil {
+	if err := endpoint.PushTag(ctx, captured.RepositoryDir, captured.Tag, tagObject); err != nil {
 		return reconcilePush(endpoint, captured, tagObject, result, err)
 	}
 	result.Phase = Complete
@@ -165,7 +178,7 @@ func reconcilePush(endpoint git.Endpoint, captured candidate.Candidate, tagObjec
 	result.Phase = Reconciliation
 	recoveryCtx, cancel := context.WithTimeout(context.Background(), recoveryTimeout)
 	defer cancel()
-	remoteTag, queryErr := endpoint.QueryTag(recoveryCtx, captured.RepositoryDir, captured.Version)
+	remoteTag, queryErr := endpoint.QueryTag(recoveryCtx, captured.RepositoryDir, captured.Tag)
 	if queryErr != nil || remoteTag.State == git.RefUnreadable || remoteTag.State == git.RefConflict {
 		result.State = Unknown
 		if queryErr == nil {
@@ -175,11 +188,11 @@ func reconcilePush(endpoint git.Endpoint, captured candidate.Candidate, tagObjec
 				queryErr = git.ErrRemoteStateUnreadable
 			}
 		}
-		return result, fmt.Errorf("push annotated tag %s failed; authoritative reconciliation failed (%w): %w", captured.Version, queryErr, pushErr)
+		return result, fmt.Errorf("push annotated tag %s to %s failed; authoritative reconciliation failed (%w): %w", captured.Tag, endpoint.PushURL, queryErr, pushErr)
 	}
 	if remoteTag.State == git.RefAbsent {
 		result.State = NotPublished
-		return result, fmt.Errorf("push annotated tag %s failed and the authoritative tag is absent: %w", captured.Version, pushErr)
+		return result, fmt.Errorf("push annotated tag %s failed and the authoritative tag is absent at %s: %w", captured.Tag, endpoint.PushURL, pushErr)
 	}
 	if remoteTag.State == git.RefPresent && remoteTag.Object == tagObject && (remoteTag.Peeled == "" || remoteTag.Peeled == captured.Commit) {
 		result.Phase = Complete
@@ -187,7 +200,7 @@ func reconcilePush(endpoint git.Endpoint, captured candidate.Candidate, tagObjec
 		return result, nil
 	}
 	result.State = Conflict
-	return result, fmt.Errorf("push annotated tag %s failed and the authoritative tag identifies object %s, not %s: %w", captured.Version, remoteTag.Object, tagObject, pushErr)
+	return result, fmt.Errorf("push annotated tag %s failed and the authoritative tag identifies object %s, not %s at %s: %w", captured.Tag, remoteTag.Object, tagObject, endpoint.PushURL, pushErr)
 }
 
 func isRemoteConflict(err error) bool {

internal/releaseidentity/identity.go

@@ -0,0 +1,226 @@
+// Package releaseidentity resolves and derives the identity of one Go module
+// release within a repository.
+package releaseidentity
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
+	"golang.org/x/mod/modfile"
+	"golang.org/x/mod/module"
+)
+
+// Selection identifies the normalized repository and selected module
+// directories. ModuleDir is an absolute path; ModuleSubdir is its canonical
+// repository-relative slash path, with "." representing the root.
+type Selection struct {
+	RepositoryDir string
+	ModuleDir     string
+	ModuleSubdir  string
+}
+
+// Identity is the release identity derived from one selected module.
+type Identity struct {
+	Selection
+	ModulePath string
+	Version    string
+	Tag        string
+	NotePath   string
+}
+
+// ResolveSelection normalizes a repository-relative module selection and
+// confirms its final filesystem location remains inside the repository.
+func ResolveSelection(repositoryDir, moduleDir string) (Selection, error) {
+	if moduleDir == "" {
+		moduleDir = "."
+	}
+	if filepath.IsAbs(moduleDir) {
+		return Selection{}, fmt.Errorf("module directory must be repository-relative: %q", moduleDir)
+	}
+	repositoryAbs, err := filepath.Abs(repositoryDir)
+	if err != nil {
+		return Selection{}, fmt.Errorf("resolve repository directory: %w", err)
+	}
+	repositoryAbs, err = filepath.EvalSymlinks(repositoryAbs)
+	if err != nil {
+		return Selection{}, fmt.Errorf("resolve repository directory %q: %w", repositoryDir, err)
+	}
+	// Preserve components until symlinks are followed, so link/.. uses the
+	// linked directory's parent just as committed path traversal does.
+	moduleAbs, err := filepath.EvalSymlinks(repositoryAbs + string(filepath.Separator) + moduleDir)
+	if err != nil {
+		return Selection{}, fmt.Errorf("resolve module directory %q: %w", moduleDir, err)
+	}
+	relative, err := filepath.Rel(repositoryAbs, moduleAbs)
+	if err != nil {
+		return Selection{}, fmt.Errorf("make module directory relative to repository: %w", err)
+	}
+	if relative == ".." || strings.HasPrefix(relative, ".."+string(filepath.Separator)) || filepath.IsAbs(relative) {
+		return Selection{}, fmt.Errorf("module directory %q resolves outside repository %q", moduleDir, repositoryDir)
+	}
+	if relative == "." {
+		return Selection{RepositoryDir: repositoryAbs, ModuleDir: moduleAbs, ModuleSubdir: "."}, nil
+	}
+	return Selection{RepositoryDir: repositoryAbs, ModuleDir: moduleAbs, ModuleSubdir: filepath.ToSlash(relative)}, nil
+}
+
+// FromCommitted derives identity from the selected module declaration at a
+// captured commit. The selected module must contain its own go.mod.
+func FromCommitted(ctx context.Context, repositoryDir, moduleDir, version, commit string) (Identity, error) {
+	resolver, err := committedPaths(repositoryDir, commit)
+	if err != nil {
+		return Identity{Version: version}, err
+	}
+	selection, err := selectCommittedDirectory(ctx, resolver, moduleDir)
+	if err != nil {
+		return Identity{Selection: selection, Version: version}, err
+	}
+	return fromCommittedSelection(ctx, selection, version, commit, resolver)
+}
+
+// ResolveCommittedSelection resolves directory selection without reading the
+// module declaration or requiring the directory to be materialized.
+func ResolveCommittedSelection(ctx context.Context, repositoryDir, moduleDir, commit string) (Selection, error) {
+	resolver, err := committedPaths(repositoryDir, commit)
+	if err != nil {
+		return Selection{}, err
+	}
+	return selectCommittedDirectory(ctx, resolver, moduleDir)
+}
+
+func committedPaths(repositoryDir, commit string) (git.PathResolver, error) {
+	repositoryAbs, err := filepath.Abs(repositoryDir)
+	if err != nil {
+		return git.PathResolver{}, err
+	}
+	repositoryAbs, err = filepath.EvalSymlinks(repositoryAbs)
+	if err != nil {
+		return git.PathResolver{}, err
+	}
+	return git.CommittedPaths(repositoryAbs, commit), nil
+}
+
+func selectCommittedDirectory(ctx context.Context, resolver git.PathResolver, moduleDir string) (Selection, error) {
+	selection := Selection{RepositoryDir: resolver.RepositoryDir}
+	if moduleDir == "" {
+		moduleDir = "."
+	}
+	if filepath.IsAbs(moduleDir) {
+		return selection, fmt.Errorf("module directory must be repository-relative: %q", moduleDir)
+	}
+	directory, err := resolver.ResolveDestination(ctx, "go.mod", filepath.ToSlash(moduleDir))
+	if err != nil {
+		return selection, fmt.Errorf("resolve committed module directory: %w", err)
+	}
+	if directory.Kind != git.DestinationDirectory {
+		return selection, fmt.Errorf("selected committed module directory %q resolves to %s at %q", moduleDir, directory.Kind, directory.Path)
+	}
+	selection.ModuleDir = filepath.Join(resolver.RepositoryDir, filepath.FromSlash(directory.Path))
+	selection.ModuleSubdir = directory.Path
+	return selection, nil
+}
+
+// FromCommittedSelection derives identity from a previously resolved module
+// selection and the selected module declaration at a captured commit.
+func FromCommittedSelection(ctx context.Context, selection Selection, version, commit string) (Identity, error) {
+	return fromCommittedSelection(ctx, selection, version, commit, git.CommittedPaths(selection.RepositoryDir, commit))
+}
+
+func fromCommittedSelection(ctx context.Context, selection Selection, version, commit string, resolver git.PathResolver) (Identity, error) {
+	identity := Identity{Selection: selection, Version: version}
+	if err := ctx.Err(); err != nil {
+		return identity, fmt.Errorf("resolve committed release identity: %w", err)
+	}
+	declarationPath, err := resolver.ResolveDestination(ctx, "go.mod", moduleFilePath(selection.ModuleSubdir))
+	if err != nil {
+		return identity, fmt.Errorf("resolve selected module declaration at %s: %w", commit, err)
+	}
+	if declarationPath.Kind != git.DestinationEntry {
+		return identity, fmt.Errorf("selected module declaration resolves to %s at %q", declarationPath.Kind, declarationPath.Path)
+	}
+	entry, _, err := resolver.Lookup(ctx, declarationPath.Path)
+	if err != nil {
+		return identity, err
+	}
+	declaration, err := git.ReadBlob(ctx, selection.RepositoryDir, entry.ObjectID)
+	if err != nil {
+		return identity, fmt.Errorf("read selected module declaration at %s: %w", commit, err)
+	}
+	return Derive(selection, declaration, version)
+}
+
+// FromWorkingTree derives identity from the selected module declaration in the
+// working tree. The selected module must contain its own go.mod.
+func FromWorkingTree(ctx context.Context, repositoryDir, moduleDir, version string) (Identity, error) {
+	selection, err := ResolveSelection(repositoryDir, moduleDir)
+	identity := Identity{Selection: selection, Version: version}
+	if err != nil {
+		return identity, err
+	}
+	if err := ctx.Err(); err != nil {
+		return identity, fmt.Errorf("resolve working-tree release identity: %w", err)
+	}
+	declarationPath := filepath.Join(selection.ModuleDir, "go.mod")
+	declaration, err := os.ReadFile(declarationPath)
+	if err != nil {
+		return identity, fmt.Errorf("read selected module declaration %q: %w", declarationPath, err)
+	}
+	return Derive(selection, declaration, version)
+}
+
+// Derive applies Go module path-major rules and derives the standard full tag
+// and module-local release-note path from a declaration and selection.
+func Derive(selection Selection, declaration []byte, version string) (Identity, error) {
+	identity := Identity{Selection: selection, Version: version}
+	if selection.RepositoryDir == "" || selection.ModuleDir == "" || selection.ModuleSubdir == "" {
+		return identity, fmt.Errorf("incomplete module selection")
+	}
+	modulePath := modfile.ModulePath(declaration)
+	if modulePath == "" {
+		return identity, fmt.Errorf("selected module declaration has no valid module directive")
+	}
+	identity.ModulePath = modulePath
+	if err := module.CheckImportPath(modulePath); err != nil {
+		return identity, fmt.Errorf("invalid module path %q: %w", modulePath, err)
+	}
+	_, pathMajor, ok := module.SplitPathVersion(modulePath)
+	if !ok {
+		return identity, fmt.Errorf("module path %q has an invalid major-version suffix", modulePath)
+	}
+	if !versioncontract.ValidStableVersion(version) {
+		return identity, fmt.Errorf("invalid stable release version %q", version)
+	}
+	if err := module.CheckPathMajor(version, pathMajor); err != nil {
+		return identity, fmt.Errorf("version %q is incompatible with module path %q: %w", version, modulePath, err)
+	}
+
+	tagPrefix := selection.ModuleSubdir
+	if strings.HasPrefix(pathMajor, "/") && tagPrefix != "." && path.Base(tagPrefix) == strings.TrimPrefix(pathMajor, "/") {
+		tagPrefix = path.Dir(tagPrefix)
+	}
+	tag := version
+	if tagPrefix != "." {
+		tag = path.Join(tagPrefix, version)
+	}
+	notePath := path.Join(selection.ModuleSubdir, "docs", "releases", version+".md")
+	return Identity{
+		Selection:  selection,
+		ModulePath: modulePath,
+		Version:    version,
+		Tag:        tag,
+		NotePath:   notePath,
+	}, nil
+}
+
+func moduleFilePath(moduleSubdir string) string {
+	if moduleSubdir == "." {
+		return "go.mod"
+	}
+	return path.Join(moduleSubdir, "go.mod")
+}

internal/releaseidentity/identity_test.go

@@ -0,0 +1,262 @@
+package releaseidentity
+
+import (
+	"context"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestDeriveUsesModuleDeclarationAndPhysicalLayout(t *testing.T) {
+	tests := []struct {
+		name       string
+		subdir     string
+		modulePath string
+		version    string
+		wantTag    string
+		wantNote   string
+	}{
+		{name: "root v1", subdir: ".", modulePath: "example.com/root", version: "v1.2.3", wantTag: "v1.2.3", wantNote: "docs/releases/v1.2.3.md"},
+		{name: "local main module", subdir: ".", modulePath: "example", version: "v1.2.3", wantTag: "v1.2.3", wantNote: "docs/releases/v1.2.3.md"},
+		{name: "local major module", subdir: "apps/local/v2", modulePath: "example/v2", version: "v2.3.4", wantTag: "apps/local/v2.3.4", wantNote: "apps/local/v2/docs/releases/v2.3.4.md"},
+		{name: "nested", subdir: "integrations/check", modulePath: "example.com/check", version: "v1.2.3", wantTag: "integrations/check/v1.2.3", wantNote: "integrations/check/docs/releases/v1.2.3.md"},
+		{name: "root major path", subdir: ".", modulePath: "example.com/root/v2", version: "v2.3.4", wantTag: "v2.3.4", wantNote: "docs/releases/v2.3.4.md"},
+		{name: "root physical major directory", subdir: "v2", modulePath: "example.com/root/v2", version: "v2.3.4", wantTag: "v2.3.4", wantNote: "v2/docs/releases/v2.3.4.md"},
+		{name: "physical major directory", subdir: "integrations/check/v2", modulePath: "example.com/check/v2", version: "v2.3.4", wantTag: "integrations/check/v2.3.4", wantNote: "integrations/check/v2/docs/releases/v2.3.4.md"},
+		{name: "logical major without physical directory", subdir: "integrations/check", modulePath: "example.com/check/v2", version: "v2.3.4", wantTag: "integrations/check/v2.3.4", wantNote: "integrations/check/docs/releases/v2.3.4.md"},
+		{name: "ordinary directory named v2", subdir: "integrations/v2", modulePath: "example.com/check", version: "v1.2.3", wantTag: "integrations/v2/v1.2.3", wantNote: "integrations/v2/docs/releases/v1.2.3.md"},
+		{name: "gopkg special major", subdir: "integrations/example.v2", modulePath: "gopkg.in/example.v2", version: "v2.3.4", wantTag: "integrations/example.v2/v2.3.4", wantNote: "integrations/example.v2/docs/releases/v2.3.4.md"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			selection := Selection{RepositoryDir: "/repo", ModuleDir: filepath.Join("/repo", filepath.FromSlash(tt.subdir)), ModuleSubdir: tt.subdir}
+			if tt.subdir == "." {
+				selection.ModuleDir = "/repo"
+			}
+			got, err := Derive(selection, []byte("module "+tt.modulePath+"\n"), tt.version)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got.Tag != tt.wantTag || got.NotePath != tt.wantNote {
+				t.Fatalf("identity tag/note = %q, %q; want %q, %q", got.Tag, got.NotePath, tt.wantTag, tt.wantNote)
+			}
+		})
+	}
+}
+
+func TestDeriveRejectsInvalidModuleAndVersionIdentity(t *testing.T) {
+	selection := Selection{RepositoryDir: "/repo", ModuleDir: "/repo", ModuleSubdir: "."}
+	for _, tt := range []struct {
+		name, declaration, version string
+	}{
+		{name: "missing module directive", declaration: "go 1.26\n", version: "v1.2.3"},
+		{name: "malformed module path", declaration: "module example.com/../bad\n", version: "v1.2.3"},
+		{name: "incompatible major", declaration: "module example.com/service/v2\n", version: "v1.2.3"},
+		{name: "incompatible local major", declaration: "module example/v2\n", version: "v1.2.3"},
+		{name: "invalid local module path", declaration: "module example/../bad\n", version: "v1.2.3"},
+		{name: "unstable version", declaration: "module example.com/service\n", version: "v1.2.3-rc.1"},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			if _, err := Derive(selection, []byte(tt.declaration), tt.version); err == nil {
+				t.Fatal("Derive() succeeded for invalid identity")
+			}
+		})
+	}
+}
+
+func TestResolveSelectionNormalizesAndRejectsEscape(t *testing.T) {
+	repository := t.TempDir()
+	moduleDir := filepath.Join(repository, "integrations", "one")
+	if err := os.MkdirAll(moduleDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	selection, err := ResolveSelection(repository, "integrations/one/../one")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if selection.ModuleSubdir != "integrations/one" || selection.ModuleDir != moduleDir {
+		t.Fatalf("normalized selection = %#v", selection)
+	}
+	root, err := ResolveSelection(repository, "")
+	if err != nil || root.ModuleSubdir != "." || root.ModuleDir != repository {
+		t.Fatalf("default root selection = %#v, error = %v", root, err)
+	}
+	if _, err := ResolveSelection(repository, "../outside"); err == nil {
+		t.Fatal("ResolveSelection() accepted a path outside the repository")
+	}
+	if _, err := ResolveSelection(repository, moduleDir); err == nil {
+		t.Fatal("ResolveSelection() accepted an absolute module path")
+	}
+	outside := t.TempDir()
+	link := filepath.Join(repository, "linked")
+	if err := os.Symlink(outside, link); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := ResolveSelection(repository, "linked"); err == nil {
+		t.Fatal("ResolveSelection() accepted a symlink that resolves outside the repository")
+	}
+}
+
+func TestCommittedAndWorkingTreeDeclarationsUseTheirOwnSources(t *testing.T) {
+	repository := t.TempDir()
+	gitIdentityRun(t, repository, "init", "-q")
+	gitIdentityRun(t, repository, "config", "user.name", "ReleaseKit test")
+	gitIdentityRun(t, repository, "config", "user.email", "releasekit@example.invalid")
+	moduleDir := filepath.Join(repository, "nested", "mod")
+	if err := os.MkdirAll(moduleDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	declaration := filepath.Join(moduleDir, "go.mod")
+	if err := os.WriteFile(declaration, []byte("module example.com/committed\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	gitIdentityRun(t, repository, "add", ".")
+	gitIdentityRun(t, repository, "commit", "-qm", "add module")
+	commit := strings.TrimSpace(gitIdentityOutput(t, repository, "rev-parse", "HEAD"))
+	if err := os.WriteFile(declaration, []byte("module example.com/working\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	committed, err := FromCommitted(context.Background(), repository, "nested/mod", "v1.2.3", commit)
+	if err != nil {
+		t.Fatal(err)
+	}
+	working, err := FromWorkingTree(context.Background(), repository, "nested/mod", "v1.2.3")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if committed.ModulePath != "example.com/committed" || committed.Tag != "nested/mod/v1.2.3" {
+		t.Fatalf("committed identity = %#v", committed)
+	}
+	if working.ModulePath != "example.com/working" || working.Tag != "nested/mod/v1.2.3" {
+		t.Fatalf("working identity = %#v", working)
+	}
+}
+
+func TestCommittedIdentityFollowsCapturedDeclarationAndDirectoryLinks(t *testing.T) {
+	repository := t.TempDir()
+	gitIdentityRun(t, repository, "init", "-q")
+	gitIdentityRun(t, repository, "config", "user.name", "ReleaseKit test")
+	gitIdentityRun(t, repository, "config", "user.email", "releasekit@example.invalid")
+	moduleDir := filepath.Join(repository, "nested")
+	if err := os.Mkdir(moduleDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	declaration := filepath.Join(repository, "module.txt")
+	if err := os.WriteFile(declaration, []byte("module example.com/committed\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("../module.txt", filepath.Join(moduleDir, "go.mod")); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("nested", filepath.Join(repository, "selected")); err != nil {
+		t.Fatal(err)
+	}
+	gitIdentityRun(t, repository, "add", ".")
+	gitIdentityRun(t, repository, "commit", "-qm", "Add linked declaration")
+	commit := strings.TrimSpace(gitIdentityOutput(t, repository, "rev-parse", "HEAD"))
+	if err := os.WriteFile(declaration, []byte("module example.com/working\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	committed, err := FromCommitted(t.Context(), repository, "selected", "v1.2.3", commit)
+	if err != nil || committed.ModulePath != "example.com/committed" || committed.ModuleDir != moduleDir || committed.Tag != "nested/v1.2.3" {
+		t.Fatalf("committed linked identity = %#v, error = %v", committed, err)
+	}
+	working, err := FromWorkingTree(t.Context(), repository, "selected", "v1.2.3")
+	if err != nil || working.ModulePath != "example.com/working" || working.ModuleDir != moduleDir {
+		t.Fatalf("working linked identity = %#v, error = %v", working, err)
+	}
+	ctx, cancel := context.WithCancel(t.Context())
+	cancel()
+	if _, err := FromCommitted(ctx, repository, "selected", "v1.2.3", commit); !errors.Is(err, context.Canceled) {
+		t.Fatalf("canceled committed identity error = %v", err)
+	}
+}
+
+func TestCommittedIdentityPreservesReferenceFailures(t *testing.T) {
+	for _, mode := range []string{"cycle", "outside", "missing", "unavailable blob"} {
+		t.Run(mode, func(t *testing.T) {
+			repository := t.TempDir()
+			gitIdentityRun(t, repository, "init", "-q")
+			gitIdentityRun(t, repository, "config", "user.name", "ReleaseKit test")
+			gitIdentityRun(t, repository, "config", "user.email", "releasekit@example.invalid")
+			target, wantCause := "go.mod", "symlink-cycle"
+			switch mode {
+			case "outside":
+				target, wantCause = "../module.txt", "outside-checkout"
+			case "missing":
+				target, wantCause = "missing.mod", "missing"
+			case "unavailable blob":
+				target, wantCause = "module.txt", "read selected module declaration"
+				if err := os.WriteFile(filepath.Join(repository, target), []byte("module example.com/linked\n"), 0o644); err != nil {
+					t.Fatal(err)
+				}
+			}
+			if err := os.Symlink(target, filepath.Join(repository, "go.mod")); err != nil {
+				t.Fatal(err)
+			}
+			gitIdentityRun(t, repository, "add", ".")
+			gitIdentityRun(t, repository, "commit", "-qm", "Add reference fixture")
+			commit := strings.TrimSpace(gitIdentityOutput(t, repository, "rev-parse", "HEAD"))
+			if mode == "unavailable blob" {
+				object := strings.TrimSpace(gitIdentityOutput(t, repository, "rev-parse", "HEAD:module.txt"))
+				if err := os.Remove(filepath.Join(repository, ".git", "objects", object[:2], object[2:])); err != nil {
+					t.Fatal(err)
+				}
+			}
+			identity, err := FromCommitted(t.Context(), repository, ".", "v1.2.3", commit)
+			if err == nil || !strings.Contains(err.Error(), wantCause) || identity.RepositoryDir != repository || identity.ModuleDir != repository {
+				t.Fatalf("identity = %#v, error = %v; want %s", identity, err, wantCause)
+			}
+		})
+	}
+}
+
+func TestSelectedNestedModuleDoesNotRequireRootDeclaration(t *testing.T) {
+	repository := t.TempDir()
+	moduleDir := filepath.Join(repository, "nested")
+	if err := os.MkdirAll(moduleDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(moduleDir, "go.mod"), []byte("module example.com/nested\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	identity, err := FromWorkingTree(context.Background(), repository, "nested", "v1.2.3")
+	if err != nil || identity.ModulePath != "example.com/nested" {
+		t.Fatalf("nested identity = %#v, error = %v", identity, err)
+	}
+	if _, err := FromWorkingTree(context.Background(), repository, ".", "v1.2.3"); err == nil {
+		t.Fatal("root selection silently fell back to a nested module declaration")
+	}
+}
+
+func TestReadersPreserveCancellation(t *testing.T) {
+	repository := t.TempDir()
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := FromWorkingTree(ctx, repository, ".", "v1.2.3"); err == nil || !strings.Contains(err.Error(), context.Canceled.Error()) {
+		t.Fatalf("working-tree error = %v, want cancellation", err)
+	}
+}
+
+func gitIdentityRun(t *testing.T, dir string, args ...string) {
+	t.Helper()
+	command := exec.Command("git", args...)
+	command.Dir = dir
+	if output, err := command.CombinedOutput(); err != nil {
+		t.Fatalf("git %v: %v\n%s", args, err, output)
+	}
+}
+
+func gitIdentityOutput(t *testing.T, dir string, args ...string) string {
+	t.Helper()
+	command := exec.Command("git", args...)
+	command.Dir = dir
+	output, err := command.Output()
+	if err != nil {
+		t.Fatalf("git %v: %v", args, err)
+	}
+	return string(output)
+}

internal/tempdir/tempdir.go

@@ -8,32 +8,77 @@ import (
 	"strings"
 )
 
-// Outside uses the system temporary directory and leaves cleanup to its caller.
+// Outside uses system temporary storage and falls back to the repository's
+// parent when TMPDIR resolves inside the worktree. Cleanup belongs to the caller.
 func Outside(repositoryDir, pattern string) (string, error) {
+	repository, err := filepath.Abs(repositoryDir)
+	if err != nil {
+		return "", err
+	}
+	repository, err = filepath.EvalSymlinks(repository)
+	if err != nil {
+		return "", err
+	}
 	directory, err := os.MkdirTemp("", pattern)
 	if err != nil {
 		return "", err
 	}
-	absolute, err := filepath.Abs(directory)
+	created := directory
+	directory, err = filepath.Abs(created)
+	if err != nil {
+		os.RemoveAll(created)
+		return "", err
+	}
+	directory, err = filepath.EvalSymlinks(directory)
 	if err != nil {
 		os.RemoveAll(directory)
 		return "", err
 	}
-	directory = absolute
-	repository, err := filepath.Abs(repositoryDir)
-	if err == nil && !strings.EqualFold(filepath.VolumeName(repository), filepath.VolumeName(directory)) {
+	outside, err := isOutside(repository, directory)
+	if err != nil {
+		os.RemoveAll(directory)
+		return "", err
+	}
+	if outside {
 		return directory, nil
 	}
-	if err == nil {
-		var relative string
-		relative, err = filepath.Rel(repository, directory)
-		if err == nil && (relative == "." || relative != ".." && !strings.HasPrefix(relative, ".."+string(filepath.Separator))) {
-			err = fmt.Errorf("temporary storage %q is inside repository %q; select an external temporary directory", directory, repository)
-		}
+	if err := os.RemoveAll(directory); err != nil {
+		return "", fmt.Errorf("remove temporary storage inside repository %q: %w", repository, err)
 	}
+	directory, err = os.MkdirTemp(filepath.Dir(repository), pattern)
+	if err != nil {
+		return "", fmt.Errorf("create temporary storage outside repository %q: %w", repository, err)
+	}
+	created = directory
+	directory, err = filepath.Abs(created)
+	if err != nil {
+		os.RemoveAll(created)
+		return "", err
+	}
+	directory, err = filepath.EvalSymlinks(directory)
 	if err != nil {
 		os.RemoveAll(directory)
 		return "", err
 	}
+	outside, err = isOutside(repository, directory)
+	if err != nil {
+		os.RemoveAll(directory)
+		return "", err
+	}
+	if !outside {
+		os.RemoveAll(directory)
+		return "", fmt.Errorf("temporary storage %q is inside repository %q", directory, repository)
+	}
 	return directory, nil
 }
+
+func isOutside(repository, directory string) (bool, error) {
+	if !strings.EqualFold(filepath.VolumeName(repository), filepath.VolumeName(directory)) {
+		return true, nil
+	}
+	relative, err := filepath.Rel(repository, directory)
+	if err != nil {
+		return false, err
+	}
+	return relative == ".." || strings.HasPrefix(relative, ".."+string(filepath.Separator)), nil
+}

internal/tempdir/tempdir_test.go

@@ -29,16 +29,28 @@ func TestOutsideHonorsRelativeTemporaryDirectory(t *testing.T) {
 	}
 }
 
-func TestOutsideRejectsAndCleansStorageInsideWorktree(t *testing.T) {
-	repository := t.TempDir()
-	setTemporaryDirectory(t, repository)
-	if directory, err := Outside(repository, "fixture-"); err == nil {
-		os.RemoveAll(directory)
-		t.Fatal("storage created inside worktree")
+func TestOutsideFallsBackWhenTemporaryDirectoryIsInsideWorktree(t *testing.T) {
+	parent := t.TempDir()
+	repository := filepath.Join(parent, "worktree")
+	if err := os.Mkdir(repository, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	localTemporary := filepath.Join(repository, "tmp")
+	if err := os.Mkdir(localTemporary, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	setTemporaryDirectory(t, localTemporary)
+	directory, err := Outside(repository, "fixture-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(directory)
+	if filepath.Dir(directory) != parent {
+		t.Fatalf("temporary storage=%q want external parent %q", directory, parent)
 	}
 	remaining, err := os.ReadDir(repository)
-	if err != nil || len(remaining) != 0 {
-		t.Fatalf("temporary storage left behind: %v %v", remaining, err)
+	if err != nil || len(remaining) != 1 || remaining[0].Name() != "tmp" {
+		t.Fatalf("temporary storage left behind in worktree: %v %v", remaining, err)
 	}
 }
 

internal/validation/diagnostic.go

@@ -25,6 +25,8 @@ const (
 	FileSize Check = "file-size"
 	// MarkdownLinks identifies missing committed Markdown destinations or anchors.
 	MarkdownLinks Check = "markdown-links"
+	// SharedFiles identifies a requested shared file that is unavailable.
+	SharedFiles Check = "shared-files"
 )
 
 // Finding describes a validation observation at an optional source location.

internal/validation/file_size.go

@@ -1,22 +1,31 @@
 package validation
 
 import (
+	"context"
+	"fmt"
 	"path"
 	"strings"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
 )
 
 const defaultFileSizeLimit int64 = 1_000_000
 
-func checkFileSize(tree *CandidateTree, settings *FileSizeSettings) error {
+func checkFileSize(ctx context.Context, tree *CandidateTree, settings *FileSizeSettings) error {
+	entries := make([]git.TreeEntry, 0, len(tree.inputEntries))
+	for _, entry := range tree.inputEntries {
+		if entry.Type == "blob" && !excludedByPath(entry.Path, settings.Exclusions) {
+			entries = append(entries, entry)
+		}
+	}
+	if err := git.PopulateBlobSizes(ctx, tree.repositoryDir, entries); err != nil {
+		return &Failure{Check: FileSize, Cause: fmt.Errorf("inspect selected committed file sizes: %w", err)}
+	}
 	limit := defaultFileSizeLimit
 	if settings.LimitBytes != nil {
 		limit = *settings.LimitBytes
 	}
-	exclusions := normalizedExclusions(settings.Exclusions)
-	for _, entry := range tree.Entries() {
-		if entry.Type != "blob" || !entry.HasSize || excludedByPath(entry.Path, exclusions) {
-			continue
-		}
+	for _, entry := range entries {
 		if entry.Size > limit {
 			return &Failure{
 				Check: FileSize,
@@ -31,6 +40,23 @@ func checkFileSize(tree *CandidateTree, settings *FileSizeSettings) error {
 	return nil
 }
 
+func fileSizeSettingsForModule(settings *FileSizeSettings, modulePath string) *FileSizeSettings {
+	if settings == nil {
+		return nil
+	}
+	selected := *settings
+	moduleRelative := make([]string, len(settings.Exclusions))
+	for index, exclusion := range settings.Exclusions {
+		if modulePath == "." || path.IsAbs(exclusion) || exclusion == "" {
+			moduleRelative[index] = exclusion
+			continue
+		}
+		moduleRelative[index] = modulePath + "/" + exclusion
+	}
+	selected.Exclusions = normalizedExclusions(moduleRelative)
+	return &selected
+}
+
 func normalizedExclusions(exclusions []string) []string {
 	result := make([]string, 0, len(exclusions))
 	for _, exclusion := range exclusions {

internal/validation/file_size_test.go

@@ -29,10 +29,11 @@ func TestCheckFileSizeUsesStrictLimitsAndDefault(t *testing.T) {
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			tree := &CandidateTree{entries: []git.TreeEntry{{
+			entries := []git.TreeEntry{{
 				Path: "file.bin", Type: "blob", Mode: "100644", Size: test.size, HasSize: true,
-			}}}
-			err := checkFileSize(tree, &FileSizeSettings{LimitBytes: test.limit})
+			}}
+			tree := &CandidateTree{entries: entries, inputEntries: entries}
+			err := checkFileSize(t.Context(), tree, &FileSizeSettings{LimitBytes: test.limit})
 			if !test.wantError {
 				if err != nil {
 					t.Fatalf("checkFileSize() error = %v, want nil", err)
@@ -104,10 +105,11 @@ func TestCheckFileSizeAppliesLiteralPathExclusions(t *testing.T) {
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			err := checkFileSize(&CandidateTree{entries: test.entries}, &FileSizeSettings{
+			settings := fileSizeSettingsForModule(&FileSizeSettings{
 				LimitBytes: int64Pointer(10),
 				Exclusions: test.exclusions,
-			})
+			}, ".")
+			err := checkFileSize(t.Context(), &CandidateTree{entries: test.entries, inputEntries: test.entries}, settings)
 			failure, ok := err.(*Failure)
 			if !ok || failure.Check != FileSize || len(failure.Findings) != 1 || failure.Findings[0].Path != test.wantPath {
 				t.Fatalf("checkFileSize() error = %v, want only %q to exceed the limit", err, test.wantPath)
@@ -137,12 +139,12 @@ func TestCheckFileSizeUsesCommittedBlobSizes(t *testing.T) {
 	}
 	cleanupCandidateTree(t, tree)
 
-	err = checkFileSize(tree, &FileSizeSettings{LimitBytes: int64Pointer(3), Exclusions: []string{"link"}})
+	err = checkFileSize(t.Context(), tree, &FileSizeSettings{LimitBytes: int64Pointer(3), Exclusions: []string{"link"}})
 	if err != nil {
 		t.Fatalf("checkFileSize() error = %v, want small binary and exact-limit blob to pass", err)
 	}
 
-	err = checkFileSize(tree, &FileSizeSettings{LimitBytes: int64Pointer(3), Exclusions: []string{"small.bin", "boundary.bin"}})
+	err = checkFileSize(t.Context(), tree, &FileSizeSettings{LimitBytes: int64Pointer(3), Exclusions: []string{"small.bin", "boundary.bin"}})
 	failure, ok := err.(*Failure)
 	if !ok || failure.Check != FileSize || len(failure.Findings) != 1 || failure.Findings[0].Path != "link" {
 		t.Fatalf("checkFileSize() error = %v, want symlink blob to exceed the limit", err)
@@ -151,7 +153,7 @@ func TestCheckFileSizeUsesCommittedBlobSizes(t *testing.T) {
 		t.Fatalf("symlink measurement = %#v, want link-text size %d", failure.Measurement, len("small.bin"))
 	}
 
-	err = checkFileSize(tree, &FileSizeSettings{LimitBytes: int64Pointer(0), Exclusions: []string{"small.bin", "boundary.bin", "link"}})
+	err = checkFileSize(t.Context(), tree, &FileSizeSettings{LimitBytes: int64Pointer(0), Exclusions: []string{"small.bin", "boundary.bin", "link"}})
 	if err != nil {
 		t.Fatalf("checkFileSize() error = %v, want omitted gitlink size", err)
 	}
@@ -172,7 +174,7 @@ func TestCheckFileSizeUsesOnlyCandidateFilesIndividually(t *testing.T) {
 		t.Fatal(err)
 	}
 	cleanupCandidateTree(t, tree)
-	if err := checkFileSize(tree, &FileSizeSettings{LimitBytes: int64Pointer(10)}); err != nil {
+	if err := checkFileSize(t.Context(), tree, &FileSizeSettings{LimitBytes: int64Pointer(10)}); err != nil {
 		t.Fatalf("checkFileSize() error = %v, want current individual files to pass", err)
 	}
 }

internal/validation/format_test.go

@@ -89,6 +89,7 @@ func TestCheckGoFormatPreservesParserAndInspectionCauses(t *testing.T) {
 		tree := &CandidateTree{
 			repositoryDir: t.TempDir(),
 			entries:       []git.TreeEntry{{Path: "missing.go", ObjectID: strings.Repeat("0", 40), Mode: "100644", Type: "blob"}},
+			inputEntries:  []git.TreeEntry{{Path: "missing.go", ObjectID: strings.Repeat("0", 40), Mode: "100644", Type: "blob"}},
 			byPath:        map[string]int{"missing.go": 0},
 		}
 		cleanupCandidateTree(t, tree)

internal/validation/local_replacements.go

@@ -13,7 +13,7 @@ import (
 func checkLocalReplacements(ctx context.Context, tree *CandidateTree) error {
 	var findings []Finding
 	replacementsByObjectID := make(map[string][]moduleReplacementSummary)
-	for _, entry := range tree.Entries() {
+	for _, entry := range tree.inputEntries {
 		if err := ctx.Err(); err != nil {
 			return &Failure{Check: LocalReplacements, Findings: findings, Cause: err}
 		}

internal/validation/local_replacements_test.go

@@ -29,9 +29,7 @@ func TestCheckLocalReplacementsParsesCommittedModuleDeclarations(t *testing.T) {
 		t.Fatalf("checkLocalReplacements error = %v, want local-replacements failure", err)
 	}
 	want := map[string]Finding{
-		"go.mod":          {Path: "go.mod", Line: 3, Target: "../local module", Directive: "replace"},
-		"nested/go.mod:4": {Path: "nested/go.mod", Line: 4, Target: "../../local", Directive: "replace"},
-		"nested/go.mod:5": {Path: "nested/go.mod", Line: 5, Target: absoluteTarget, Directive: "replace"},
+		"go.mod": {Path: "go.mod", Line: 3, Target: "../local module", Directive: "replace"},
 	}
 	if len(failure.Findings) != len(want) {
 		t.Fatalf("findings = %#v, want %d filesystem replacements", failure.Findings, len(want))
@@ -46,6 +44,27 @@ func TestCheckLocalReplacementsParsesCommittedModuleDeclarations(t *testing.T) {
 			t.Errorf("finding = %#v, want %q", finding, key)
 		}
 	}
+
+	nestedTree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{ModuleDir: filepath.Join(repository, "nested")})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, nestedTree)
+	err = checkLocalReplacements(context.Background(), nestedTree)
+	if !errors.As(err, &failure) || failure.Check != LocalReplacements || len(failure.Findings) != 2 {
+		t.Fatalf("nested replacement findings = %#v, want the selected module's two replacements", err)
+	}
+	for _, finding := range failure.Findings {
+		wantLine := 4
+		wantTarget := "../../local"
+		if finding.Line == 5 {
+			wantLine = 5
+			wantTarget = absoluteTarget
+		}
+		if finding.Path != "nested/go.mod" || finding.Line != wantLine || finding.Target != wantTarget || finding.Directive != "replace" {
+			t.Errorf("nested finding = %#v, want line %d target %q", finding, wantLine, wantTarget)
+		}
+	}
 }
 
 func TestCheckLocalReplacementsFollowsCommittedModuleSymlinks(t *testing.T) {
@@ -58,7 +77,7 @@ func TestCheckLocalReplacementsFollowsCommittedModuleSymlinks(t *testing.T) {
 		t.Fatal(err)
 	}
 	commit := commitCandidateTree(t, repository)
-	tree, err := ReadCandidateTree(context.Background(), repository, commit)
+	tree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{ModuleDir: filepath.Join(repository, "nested")})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -91,7 +110,10 @@ func TestCheckLocalReplacementsSharesSummariesAcrossModuleSymlinks(t *testing.T)
 		}
 	}
 	commit := commitCandidateTree(t, repository)
-	tree, err := ReadCandidateTree(context.Background(), repository, commit)
+	tree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir:   repository,
+		SharedFiles: []string{"first/go.mod", "second/go.mod"},
+	})
 	if err != nil {
 		t.Fatal(err)
 	}

internal/validation/markdown_check.go

@@ -17,7 +17,7 @@ func checkMarkdownLinks(ctx context.Context, tree *CandidateTree, enforceCheckou
 	}
 	cache := newMarkdownCache(tree)
 	var findings []Finding
-	for _, entry := range tree.Entries() {
+	for _, entry := range tree.inputEntries {
 		if err := ctx.Err(); err != nil {
 			return &Failure{Check: MarkdownLinks, Findings: findings, Cause: err}
 		}

internal/validation/race_test.go

@@ -19,25 +19,38 @@ func TestRunUsesOneSuiteWithGoValidationSettings(t *testing.T) {
 		name    string
 		race    bool
 		fullVet bool
+		compile []Target
 	}{
 		{name: "default"},
 		{name: "race", race: true},
 		{name: "full vet", fullVet: true},
 		{name: "race and full vet", race: true, fullVet: true},
+		{name: "target compilation", compile: []Target{{OS: "linux", Arch: "amd64"}}},
 	} {
 		t.Run(test.name, func(t *testing.T) {
 			logPath := installGoShim(t, "", false)
+			repositoryDir := t.TempDir()
+			moduleDir := filepath.Join(repositoryDir, "nested module")
+			if err := os.MkdirAll(moduleDir, 0o700); err != nil {
+				t.Fatal(err)
+			}
 			err := Run(context.Background(), Request{
-				RepositoryDir: t.TempDir(),
-				Settings:      Settings{Race: test.race, FullVet: test.fullVet},
+				RepositoryDir: repositoryDir,
+				ModuleDir:     moduleDir,
+				Settings:      Settings{Race: test.race, FullVet: test.fullVet, CompileTargets: test.compile},
 			})
 			if err != nil {
 				t.Fatalf("Run() error = %v", err)
 			}
 
 			commands := readGoShimLog(t, logPath)
-			var tests, vets []string
-			var testPosition, vetPosition int
+			for _, directory := range readGoShimDirectories(t, os.Getenv("RELEASEKIT_GO_DIR_LOG")) {
+				if directory != moduleDir {
+					t.Errorf("Go command directory = %q, want selected module %q", directory, moduleDir)
+				}
+			}
+			var tests, vets, builds []string
+			var testPosition, vetPosition, buildPosition int
 			for i, command := range commands {
 				if strings.HasPrefix(command, "test ") {
 					tests = append(tests, command)
@@ -47,6 +60,10 @@ func TestRunUsesOneSuiteWithGoValidationSettings(t *testing.T) {
 					vets = append(vets, command)
 					vetPosition = i
 				}
+				if strings.HasPrefix(command, "build ") {
+					builds = append(builds, command)
+					buildPosition = i
+				}
 			}
 			if len(tests) != 1 {
 				t.Fatalf("Go test invocations = %q, want exactly one", tests)
@@ -81,6 +98,27 @@ func TestRunUsesOneSuiteWithGoValidationSettings(t *testing.T) {
 					t.Errorf("Go vet command %q did not follow the test suite %q", vets[0], tests[0])
 				}
 			}
+			wantBuilds := 0
+			if len(test.compile) != 0 {
+				wantBuilds = len(test.compile)
+			}
+			if len(builds) != wantBuilds {
+				t.Fatalf("Go build invocations = %q, want %d", builds, wantBuilds)
+			}
+			if wantBuilds != 0 {
+				buildCommand := " " + builds[0] + " "
+				for _, argument := range []string{"build", "-mod=readonly", "-o", os.DevNull, "./..."} {
+					if !strings.Contains(buildCommand, " "+argument+" ") {
+						t.Errorf("Go compile command %q does not contain %q", builds[0], argument)
+					}
+				}
+				if buildPosition <= testPosition {
+					t.Errorf("Go compile command %q did not follow the test suite %q", builds[0], tests[0])
+				}
+				if environments := readGoShimLog(t, os.Getenv("RELEASEKIT_GO_ENV_LOG")); len(environments) != 1 || environments[0] != "linux/amd64|0" {
+					t.Errorf("Go compile baseline = %q, want linux/amd64|0", environments)
+				}
+			}
 		})
 	}
 }
@@ -111,6 +149,49 @@ func TestRunReportsRacePrerequisiteFailureWithoutFallback(t *testing.T) {
 	}
 }
 
+func TestRunValidatesOnlyTheSelectedModule(t *testing.T) {
+	t.Setenv("GOENV", "off")
+	repositoryDir := t.TempDir()
+	nestedDir := filepath.Join(repositoryDir, "nested")
+	siblingDir := filepath.Join(repositoryDir, "sibling")
+	for _, directory := range []string{nestedDir, siblingDir} {
+		if err := os.MkdirAll(directory, 0o700); err != nil {
+			t.Fatal(err)
+		}
+	}
+	writeModule := func(directory, name, testSource string) {
+		t.Helper()
+		files := map[string]string{
+			"go.mod":         "module " + name + "\n\ngo 1.25.0\n",
+			"module_test.go": testSource,
+		}
+		for filename, contents := range files {
+			if err := os.WriteFile(filepath.Join(directory, filename), []byte(contents), 0o600); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+	passingTest := "package fixture\nimport \"testing\"\nfunc TestSelected(t *testing.T) {}\n"
+	failingTest := "package fixture\nimport \"testing\"\nfunc TestSibling(t *testing.T) { t.Fatal(\"sibling suite ran\") }\n"
+	writeModule(repositoryDir, "example.com/root", passingTest)
+	writeModule(nestedDir, "example.com/nested", passingTest)
+	writeModule(siblingDir, "example.com/sibling", failingTest)
+
+	if err := Run(context.Background(), Request{RepositoryDir: repositoryDir}); err != nil {
+		t.Fatalf("root module validation: %v", err)
+	}
+	if err := Run(context.Background(), Request{RepositoryDir: repositoryDir, ModuleDir: nestedDir}); err != nil {
+		t.Fatalf("nested module validation ran a sibling suite: %v", err)
+	}
+
+	writeModule(nestedDir, "example.com/nested", failingTest)
+	err := Run(context.Background(), Request{RepositoryDir: repositoryDir, ModuleDir: nestedDir})
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != GoTest {
+		t.Fatalf("failing nested module result = %v, want Go test failure", err)
+	}
+}
+
 func TestRunStopsAfterGoTestFailure(t *testing.T) {
 	logPath := installGoShim(t, "test", false)
 	err := Run(context.Background(), Request{
@@ -214,6 +295,7 @@ func installGoShim(t *testing.T, failure string, delayVet bool) string {
 	directory := t.TempDir()
 	logPath := filepath.Join(directory, "go-commands")
 	envLogPath := filepath.Join(directory, "go-environment")
+	directoryLogPath := filepath.Join(directory, "go-directories")
 	settings := map[string]string{
 		"GOHOSTOS":   runtime.GOOS,
 		"GOHOSTARCH": runtime.GOARCH,
@@ -263,6 +345,7 @@ fi
 	script := fmt.Sprintf(`#!/bin/sh
 set -eu
 printf '%%s\n' "$*" >> "$RELEASEKIT_GO_LOG"
+pwd -P >> "$RELEASEKIT_GO_DIR_LOG"
 if [ "${1-}" = "env" ]; then
 	printf '%%s\n' '%s'
 	exit 0
@@ -281,6 +364,7 @@ exit 0
 	t.Setenv("PATH", path)
 	t.Setenv("RELEASEKIT_GO_LOG", logPath)
 	t.Setenv("RELEASEKIT_GO_ENV_LOG", envLogPath)
+	t.Setenv("RELEASEKIT_GO_DIR_LOG", directoryLogPath)
 	return logPath
 }
 
@@ -293,6 +377,15 @@ func readGoShimLog(t *testing.T, path string) []string {
 	return strings.Split(strings.TrimSpace(string(contents)), "\n")
 }
 
+func readGoShimDirectories(t *testing.T, path string) []string {
+	t.Helper()
+	contents, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return strings.Split(strings.TrimSpace(string(contents)), "\n")
+}
+
 func raceSupported(goos, goarch string) bool {
 	switch goos {
 	case "darwin":

internal/validation/scope_checks_test.go

@@ -0,0 +1,125 @@
+package validation
+
+import (
+	"context"
+	"errors"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestRunFileChecksUseSelectedInputsAndFullReferenceLookup(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "go.mod", []byte("module example.com/root\n\ngo 1.25.0\nreplace example.com/rootdep => ./missing\n"))
+	writeTreeFile(t, repository, "go.work", []byte("go 1.25.0\n"))
+	writeTreeFile(t, repository, "outside.go", []byte("package outside\nfunc broken( ){}\n"))
+	writeTreeFile(t, repository, "outside.bin", []byte(strings.Repeat("x", 160)))
+	writeTreeFile(t, repository, "nested/go.mod", []byte("module example.com/nested\n\ngo 1.25.0\n"))
+	writeTreeFile(t, repository, "nested/source.go", []byte("package nested\n\nfunc ready() {}\n"))
+	writeTreeFile(t, repository, "nested/ignored.bin", []byte(strings.Repeat("x", 160)))
+	writeTreeFile(t, repository, "nested/docs/guide.md", []byte("# Guide\n\n[details](../../sibling/docs/target.md#details)\n"))
+	writeTreeFile(t, repository, "nested/child/go.mod", []byte("module example.com/nested/child\n"))
+	writeTreeFile(t, repository, "nested/child/broken.go", []byte("package child\nfunc broken( ){}\n"))
+	writeTreeFile(t, repository, "nested/child/go.work", []byte("go 1.25.0\n"))
+	writeTreeFile(t, repository, "sibling/go.mod", []byte("module example.com/sibling\n\nreplace example.com/siblingdep => ./missing\n"))
+	writeTreeFile(t, repository, "sibling/go.work", []byte("go 1.25.0\n"))
+	writeTreeFile(t, repository, "sibling/broken.go", []byte("package sibling\nfunc broken( ){}\n"))
+	writeTreeFile(t, repository, "sibling/outside.bin", []byte(strings.Repeat("x", 160)))
+	writeTreeFile(t, repository, "sibling/docs/target.md", []byte("# Details\n\n[broken](missing.md)\n"))
+	writeTreeFile(t, repository, "shared/broken.go", []byte("package shared\nfunc broken( ){}\n"))
+	commit := commitCandidateTree(t, repository)
+	installGoShim(t, "", false)
+	moduleDir := filepath.Join(repository, "nested")
+	settings := Settings{
+		GoFormat: true,
+		ModuleDistribution: ModuleDistributionSettings{
+			WorkspaceFiles:    true,
+			LocalReplacements: true,
+		},
+		FileSize: &FileSizeSettings{LimitBytes: int64Pointer(100), Exclusions: []string{"ignored.bin"}},
+		Markdown: &MarkdownSettings{EnforceCheckoutBoundary: true},
+	}
+	request := Request{RepositoryDir: repository, ModuleDir: moduleDir, Commit: commit, Settings: settings}
+	if err := Run(context.Background(), request); err != nil {
+		t.Fatalf("selected module checks = %v, want out-of-scope violations ignored and cross-module anchor resolved", err)
+	}
+
+	request.Settings.FileSize.Exclusions = nil
+	err := Run(context.Background(), request)
+	assertScopedFailure(t, err, FileSize, "nested/ignored.bin")
+
+	writeTreeFile(t, repository, "nested/broken.go", []byte("package nested\nfunc broken( ){}\n"))
+	request.Commit = commitCandidateTree(t, repository)
+	request.Settings = Settings{GoFormat: true}
+	assertScopedFailure(t, Run(context.Background(), request), GoFormat, "nested/broken.go")
+
+	writeTreeFile(t, repository, "nested/go.work", []byte("go 1.25.0\n"))
+	request.Commit = commitCandidateTree(t, repository)
+	request.Settings = Settings{ModuleDistribution: ModuleDistributionSettings{WorkspaceFiles: true}}
+	assertScopedFailure(t, Run(context.Background(), request), WorkspaceFiles, "nested/go.work")
+
+	writeTreeFile(t, repository, "nested/go.mod", []byte("module example.com/nested\n\ngo 1.25.0\nreplace example.com/nesteddep => ./missing\n"))
+	request.Commit = commitCandidateTree(t, repository)
+	request.Settings = Settings{ModuleDistribution: ModuleDistributionSettings{LocalReplacements: true}}
+	assertScopedFailure(t, Run(context.Background(), request), LocalReplacements, "nested/go.mod")
+
+	writeTreeFile(t, repository, "nested/docs/guide.md", []byte("# Guide\n\n[details](../../sibling/docs/target.md#details)\n\n[missing](absent.md)\n"))
+	request.Commit = commitCandidateTree(t, repository)
+	request.Settings = Settings{Markdown: &MarkdownSettings{}}
+	assertScopedFailure(t, Run(context.Background(), request), MarkdownLinks, "nested/docs/guide.md")
+
+	request.Settings = Settings{GoFormat: true, SharedFiles: []string{"shared/broken.go"}}
+	assertScopedFailure(t, Run(context.Background(), request), GoFormat, "shared/broken.go")
+}
+
+func assertScopedFailure(t *testing.T, err error, check Check, path string) {
+	t.Helper()
+	failure, ok := err.(*Failure)
+	if !ok || failure.Check != check {
+		t.Fatalf("validation error = %v, want %s failure", err, check)
+	}
+	for _, finding := range failure.Findings {
+		if finding.Path == path {
+			return
+		}
+	}
+	t.Fatalf("%s findings = %#v, want path %q", check, failure.Findings, path)
+}
+
+func TestFileSizeExclusionsAreModuleRelative(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "nested/go.mod", []byte("module example.com/nested\n"))
+	writeTreeFile(t, repository, "nested/dist/output.bin", []byte(strings.Repeat("x", 20)))
+	writeTreeFile(t, repository, "nested/dist-old/output.bin", []byte(strings.Repeat("x", 20)))
+	commit := commitCandidateTree(t, repository)
+	tree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{ModuleDir: filepath.Join(repository, "nested")})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, tree)
+	settings := fileSizeSettingsForModule(&FileSizeSettings{LimitBytes: int64Pointer(10), Exclusions: []string{"./dist/"}}, tree.modulePath)
+	err = checkFileSize(t.Context(), tree, settings)
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != FileSize || len(failure.Findings) != 1 || failure.Findings[0].Path != "nested/dist-old/output.bin" {
+		t.Fatalf("module-relative file-size exclusion error = %v, want only nested/dist-old/output.bin", err)
+	}
+}
+
+func TestSharedFileSelectionFailureCarriesCauseAndPresentation(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "go.mod", []byte("module example.com/root\n"))
+	commit := commitCandidateTree(t, repository)
+	installGoShim(t, "", false)
+	err := Run(context.Background(), Request{
+		RepositoryDir: repository,
+		Commit:        commit,
+		Settings:      Settings{SharedFiles: []string{"missing.txt"}},
+	})
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != SharedFiles || failure.Cause == nil || len(failure.Findings) != 1 || failure.Findings[0].Path != "missing.txt" {
+		t.Fatalf("shared-file selection error = %#v, want path, cause, and shared-files identity", err)
+	}
+	if !strings.Contains(err.Error(), "shared-files") || !strings.Contains(err.Error(), "missing.txt") {
+		t.Fatalf("shared-file error text = %q, want existing check/path presentation", err)
+	}
+}

internal/validation/scope_performance_test.go

@@ -0,0 +1,38 @@
+package validation
+
+import (
+	"fmt"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
+)
+
+func BenchmarkSelectInputEntriesByModuleCount(b *testing.B) {
+	const retainedFiles = 20000
+	for _, boundaries := range []int{0, 1000, 4000} {
+		b.Run(fmt.Sprintf("boundaries=%d", boundaries), func(b *testing.B) {
+			entries := make([]git.TreeEntry, 0, retainedFiles+2*boundaries)
+			entries = append(entries, git.TreeEntry{Path: "go.mod", Type: "blob", Mode: "100644"})
+			for file := 1; file < retainedFiles; file++ {
+				entries = append(entries, git.TreeEntry{Path: fmt.Sprintf("source/file-%06d.txt", file), Type: "blob", Mode: "100644"})
+			}
+			for module := 0; module < boundaries; module++ {
+				directory := fmt.Sprintf("modules/unit-%06d", module)
+				entries = append(entries,
+					git.TreeEntry{Path: directory + "/go.mod", Type: "blob", Mode: "100644"},
+					git.TreeEntry{Path: directory + "/source.go", Type: "blob", Mode: "100644"})
+			}
+			byPath := make(map[string]int, len(entries))
+			for i, entry := range entries {
+				byPath[entry.Path] = i
+			}
+			b.ReportAllocs()
+			for b.Loop() {
+				selected, err := selectInputEntries(entries, byPath, ".", []string{})
+				if err != nil || len(selected) != retainedFiles {
+					b.Fatalf("selected %d files, error=%v; want %d", len(selected), err, retainedFiles)
+				}
+			}
+		})
+	}
+}

internal/validation/tree.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"path"
 	"path/filepath"
+	"sort"
 	"strings"
 
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
@@ -15,7 +16,9 @@ import (
 type CandidateTree struct {
 	context        context.Context
 	repositoryDir  string
+	modulePath     string
 	entries        []git.TreeEntry
+	inputEntries   []git.TreeEntry
 	byPath         map[string]int
 	directories    map[string]struct{}
 	blobReader     *git.BlobReader
@@ -25,16 +28,40 @@ type CandidateTree struct {
 	closeErr       error
 }
 
+// TreeScope selects the automatic input files for one physical module and
+// optional repository-shared files. ModuleDir is an absolute path. A nil
+// SharedFiles slice selects the optional default files; a non-nil slice
+// replaces those defaults.
+type TreeScope struct {
+	ModuleDir   string
+	SharedFiles []string
+}
+
 // ReadCandidateTree enumerates the captured commit without reading from the
 // worktree. The supplied context also governs the scoped reader through closure.
 func ReadCandidateTree(ctx context.Context, repositoryDir, commit string) (*CandidateTree, error) {
+	repositoryAbs, err := filepath.Abs(repositoryDir)
+	if err != nil {
+		return nil, fmt.Errorf("resolve candidate repository directory: %w", err)
+	}
+	return ReadCandidateTreeForScope(ctx, repositoryDir, commit, TreeScope{ModuleDir: repositoryAbs})
+}
+
+// ReadCandidateTreeForScope retains the complete committed tree for reference
+// lookup and separately constructs the selected automatic input paths.
+func ReadCandidateTreeForScope(ctx context.Context, repositoryDir, commit string, scope TreeScope) (*CandidateTree, error) {
 	entries, err := git.ReadTree(ctx, repositoryDir, commit)
 	if err != nil {
 		return nil, err
 	}
+	modulePath, err := repositoryModulePath(repositoryDir, scope.ModuleDir)
+	if err != nil {
+		return nil, err
+	}
 	tree := &CandidateTree{
 		context:        ctx,
 		repositoryDir:  repositoryDir,
+		modulePath:     modulePath,
 		entries:        entries,
 		byPath:         make(map[string]int, len(entries)),
 		directories:    make(map[string]struct{}),
@@ -47,6 +74,11 @@ func ReadCandidateTree(ctx context.Context, repositoryDir, commit string) (*Cand
 			tree.directories[directory] = struct{}{}
 		}
 	}
+	tree.inputEntries, err = selectInputEntries(entries, tree.byPath, modulePath, scope.SharedFiles)
+	if err != nil {
+		_ = tree.Close()
+		return nil, err
+	}
 	return tree, nil
 }
 
@@ -55,6 +87,139 @@ func (tree *CandidateTree) Entries() []git.TreeEntry {
 	return append([]git.TreeEntry(nil), tree.entries...)
 }
 
+// InputEntries returns the ordered committed files selected for automatic
+// checks. It is separate from Entries so reference resolution retains the full
+// repository tree.
+func (tree *CandidateTree) InputEntries() []git.TreeEntry {
+	return append([]git.TreeEntry(nil), tree.inputEntries...)
+}
+
+func selectInputEntries(entries []git.TreeEntry, byPath map[string]int, modulePath string, sharedFiles []string) ([]git.TreeEntry, error) {
+	boundaries := make(map[string]struct{})
+	for _, entry := range entries {
+		moduleRelative, ok := relativeToModule(entry.Path, modulePath)
+		if !ok || moduleRelative == "go.mod" || path.Base(moduleRelative) != "go.mod" {
+			continue
+		}
+		if insideVendor(moduleRelative) {
+			continue
+		}
+		boundaries[path.Dir(entry.Path)] = struct{}{}
+	}
+	selected := make(map[string]git.TreeEntry)
+	for _, entry := range entries {
+		moduleRelative, ok := relativeToModule(entry.Path, modulePath)
+		if !ok || moduleRelative == "" {
+			continue
+		}
+		excluded := false
+		for ancestor := entry.Path; ancestor != "." && ancestor != modulePath; ancestor = path.Dir(ancestor) {
+			if _, isBoundary := boundaries[ancestor]; isBoundary {
+				excluded = true
+				break
+			}
+		}
+		if !excluded {
+			selected[entry.Path] = entry
+		}
+	}
+
+	usingDefaults := sharedFiles == nil
+	if usingDefaults {
+		sharedFiles = []string{"COPYRIGHT", "LICENSE", "docs/oss/attribution.md"}
+	}
+	for _, requested := range sharedFiles {
+		name, err := normalizeSharedFile(requested)
+		if err != nil {
+			cause := fmt.Errorf("invalid shared file path %q: %w", requested, err)
+			return nil, &Failure{Check: SharedFiles, Findings: []Finding{{Path: requested, Message: cause.Error()}}, Cause: cause}
+		}
+		index, exists := byPath[name]
+		if !exists || entries[index].Type != "blob" {
+			if usingDefaults {
+				continue
+			}
+			cause := fmt.Errorf("selected shared file %q is not present in the committed tree", name)
+			return nil, &Failure{Check: SharedFiles, Findings: []Finding{{Path: name, Message: "selected shared file is not present in the committed tree"}}, Cause: cause}
+		}
+		selected[name] = entries[index]
+	}
+
+	paths := make([]string, 0, len(selected))
+	for name := range selected {
+		paths = append(paths, name)
+	}
+	sort.Strings(paths)
+	inputs := make([]git.TreeEntry, 0, len(paths))
+	for _, name := range paths {
+		inputs = append(inputs, selected[name])
+	}
+	return inputs, nil
+}
+
+func repositoryModulePath(repositoryDir, moduleDir string) (string, error) {
+	repositoryAbs, err := filepath.Abs(repositoryDir)
+	if err != nil {
+		return "", fmt.Errorf("resolve candidate repository directory: %w", err)
+	}
+	if moduleDir == "" {
+		moduleDir = repositoryAbs
+	}
+	if !filepath.IsAbs(moduleDir) {
+		return "", fmt.Errorf("selected module directory must be absolute: %q", moduleDir)
+	}
+	moduleAbs, err := filepath.Abs(moduleDir)
+	if err != nil {
+		return "", fmt.Errorf("resolve selected module directory: %w", err)
+	}
+	relative, err := filepath.Rel(repositoryAbs, moduleAbs)
+	if err != nil {
+		return "", fmt.Errorf("make selected module relative to repository: %w", err)
+	}
+	if relative == ".." || strings.HasPrefix(relative, ".."+string(filepath.Separator)) || filepath.IsAbs(relative) {
+		return "", fmt.Errorf("selected module directory %q is outside repository %q", moduleDir, repositoryDir)
+	}
+	modulePath := filepath.ToSlash(relative)
+	if relative == "." {
+		modulePath = "."
+	}
+	return modulePath, nil
+}
+
+func relativeToModule(repositoryPath, modulePath string) (string, bool) {
+	if modulePath == "." {
+		return repositoryPath, true
+	}
+	if repositoryPath == modulePath {
+		return "", true
+	}
+	prefix := modulePath + "/"
+	if !strings.HasPrefix(repositoryPath, prefix) {
+		return "", false
+	}
+	return strings.TrimPrefix(repositoryPath, prefix), true
+}
+
+func insideVendor(moduleRelative string) bool {
+	for _, component := range strings.Split(moduleRelative, "/") {
+		if component == "vendor" {
+			return true
+		}
+	}
+	return false
+}
+
+func normalizeSharedFile(name string) (string, error) {
+	if name == "" || path.IsAbs(name) {
+		return "", fmt.Errorf("shared file path must be a repository-relative file path")
+	}
+	clean := path.Clean(name)
+	if clean == "." || clean == ".." || strings.HasPrefix(clean, "../") {
+		return "", fmt.Errorf("shared file path must stay within the repository")
+	}
+	return clean, nil
+}
+
 // ReadFile returns newly allocated, caller-owned bytes for a committed blob.
 // Regular-file content is not cached, so repeated reads request the object
 // again through the tree's scoped blob reader.
@@ -145,137 +310,32 @@ func (tree *CandidateTree) Entry(path string) (git.TreeEntry, bool) {
 }
 
 // DestinationKind classifies a committed local destination.
-type DestinationKind string
+type DestinationKind = git.DestinationKind
 
 const (
-	DestinationEntry           DestinationKind = "entry"
-	DestinationDirectory       DestinationKind = "directory"
-	DestinationMissing         DestinationKind = "missing"
-	DestinationOutsideCheckout DestinationKind = "outside-checkout"
-	DestinationSubmodule       DestinationKind = "submodule"
-	DestinationSymlinkCycle    DestinationKind = "symlink-cycle"
+	DestinationEntry           = git.DestinationEntry
+	DestinationDirectory       = git.DestinationDirectory
+	DestinationMissing         = git.DestinationMissing
+	DestinationOutsideCheckout = git.DestinationOutsideCheckout
+	DestinationSubmodule       = git.DestinationSubmodule
+	DestinationSymlinkCycle    = git.DestinationSymlinkCycle
 )
 
-// Destination records the resolved identity and its classification.
-type Destination struct {
-	Kind DestinationKind
-	Path string
-}
+type Destination = git.Destination
 
-// ResolveDestination resolves local destinations using the captured Git tree.
-// Relative destinations start at the source directory; absolute destinations
-// within the repository directory map back to committed paths.
+// ResolveDestination uses shared committed reference traversal with the tree's
+// indexed metadata and scoped symlink reader.
 func (tree *CandidateTree) ResolveDestination(ctx context.Context, sourcePath, destination string) (Destination, error) {
-	if err := ctx.Err(); err != nil {
-		return Destination{}, err
+	resolver := git.PathResolver{
+		RepositoryDir: tree.repositoryDir,
+		Lookup: func(_ context.Context, name string) (git.TreeEntry, bool, error) {
+			if entry, exists := tree.Entry(name); exists {
+				return entry, true, nil
+			}
+			_, exists := tree.directories[name]
+			return git.TreeEntry{Path: name, Type: "tree"}, exists, nil
+		},
+		ReadLink: tree.readSymlinkTarget,
 	}
-	directory := path.Dir(sourcePath)
-	if path.IsAbs(destination) {
-		relative, inside, err := tree.relativeAbsoluteDestination(destination)
-		if err != nil {
-			return Destination{}, err
-		}
-		if !inside {
-			return Destination{Kind: DestinationOutsideCheckout, Path: destination}, nil
-		}
-		directory, destination = ".", relative
-	}
-	return tree.resolveDestination(ctx, directory, strings.Split(destination, "/"), make(map[string]bool))
-}
-
-func (tree *CandidateTree) resolveDestination(ctx context.Context, directory string, components []string, active map[string]bool) (Destination, error) {
-	for index, component := range components {
-		if err := ctx.Err(); err != nil {
-			return Destination{}, err
-		}
-		remaining := components[index+1:]
-		switch component {
-		case "", ".":
-			continue
-		case "..":
-			if directory == "." {
-				return Destination{Kind: DestinationOutsideCheckout, Path: unresolvedPath("..", remaining)}, nil
-			}
-			directory = path.Dir(directory)
-			continue
-		}
-		partial := path.Join(directory, component)
-		entry, exists := tree.Entry(partial)
-		if !exists {
-			if _, isDirectory := tree.directories[partial]; !isDirectory {
-				return Destination{Kind: DestinationMissing, Path: unresolvedPath(partial, remaining)}, nil
-			}
-			directory = partial
-			continue
-		}
-		if entry.Mode == "160000" {
-			return Destination{Kind: DestinationSubmodule, Path: unresolvedPath(partial, remaining)}, nil
-		}
-		if entry.Mode == "120000" {
-			if active[partial] {
-				return Destination{Kind: DestinationSymlinkCycle, Path: partial}, nil
-			}
-			entry, _ := tree.Entry(partial)
-			linkText, err := tree.readSymlinkTarget(ctx, entry)
-			if err != nil {
-				return Destination{}, fmt.Errorf("read committed symlink %q: %w", partial, err)
-			}
-			target := linkText
-			targetDirectory := directory
-			if path.IsAbs(target) {
-				relative, inside, err := tree.relativeAbsoluteDestination(target)
-				if err != nil {
-					return Destination{}, err
-				}
-				if !inside {
-					return Destination{Kind: DestinationOutsideCheckout, Path: unresolvedPath(target, remaining)}, nil
-				}
-				targetDirectory, target = ".", relative
-			}
-			active[partial] = true
-			destination, err := tree.resolveDestination(ctx, targetDirectory, strings.Split(target, "/"), active)
-			delete(active, partial)
-			if err != nil || len(remaining) == 0 {
-				return destination, err
-			}
-			switch destination.Kind {
-			case DestinationDirectory:
-				return tree.resolveDestination(ctx, destination.Path, remaining, active)
-			case DestinationEntry:
-				destination.Kind = DestinationMissing
-			case DestinationSymlinkCycle:
-				return destination, nil
-			}
-			destination.Path = unresolvedPath(destination.Path, remaining)
-			return destination, nil
-		}
-		if len(remaining) != 0 {
-			return Destination{Kind: DestinationMissing, Path: unresolvedPath(partial, remaining)}, nil
-		}
-		return Destination{Kind: DestinationEntry, Path: partial}, nil
-	}
-	return Destination{Kind: DestinationDirectory, Path: directory}, nil
-}
-
-func (tree *CandidateTree) relativeAbsoluteDestination(destination string) (string, bool, error) {
-	root, err := filepath.Abs(tree.repositoryDir)
-	if err != nil {
-		return "", false, fmt.Errorf("resolve candidate repository directory: %w", err)
-	}
-	root = filepath.ToSlash(root)
-	if destination == root {
-		return ".", true, nil
-	}
-	// Preserve the suffix for component traversal, including symlinks before '..'.
-	relative, inside := strings.CutPrefix(destination, strings.TrimSuffix(root, "/")+"/")
-	return relative, inside, nil
-}
-
-// unresolvedPath preserves components that could not be traversed. Cleaning
-// them would hide missing entries, non-directories, or checkout boundaries.
-func unresolvedPath(base string, remaining []string) string {
-	if len(remaining) == 0 {
-		return base
-	}
-	return base + "/" + strings.Join(remaining, "/")
+	return resolver.ResolveDestination(ctx, sourcePath, destination)
 }

internal/validation/tree_test.go

@@ -48,10 +48,10 @@ func TestReadCandidateTreeUsesCapturedCommitAndEnumeratesGitEntries(t *testing.T
 			t.Errorf("committed tree is missing %q", path)
 		}
 	}
-	if got := entries["binary.dat"]; got.size != 4 || !got.hasSize {
-		t.Errorf("binary metadata = %#v, want size 4", got)
+	if got := entries["binary.dat"]; got.mode != "100644" || got.kind != "blob" {
+		t.Errorf("binary metadata = %#v", got)
 	}
-	if got := entries["readme-link"]; got.mode != "120000" || got.kind != "blob" || !got.hasSize {
+	if got := entries["readme-link"]; got.mode != "120000" || got.kind != "blob" {
 		t.Errorf("symlink metadata = %#v", got)
 	}
 	if got := entries["submodule"]; got.mode != "160000" || got.kind != "commit" || got.hasSize {
@@ -78,6 +78,239 @@ func TestReadCandidateTreeUsesCapturedCommitAndEnumeratesGitEntries(t *testing.T
 	}
 }
 
+func TestReadCandidateTreeForScopeExcludesNestedModulesAndRetainsFullLookup(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "COPYRIGHT", []byte("copyright\n"))
+	writeTreeFile(t, repository, "LICENSE", []byte("license\n"))
+	writeTreeFile(t, repository, "docs/oss/attribution.md", []byte("attribution\n"))
+	writeTreeFile(t, repository, "go.mod", []byte("module example.com/root\n"))
+	writeTreeFile(t, repository, "root.go", []byte("package root\n"))
+	writeTreeFile(t, repository, "parent/go.mod", []byte("module example.com/parent\n"))
+	writeTreeFile(t, repository, "parent/main.go", []byte("package parent\n"))
+	writeTreeFile(t, repository, "parent/vendor/library/go.mod", []byte("not a boundary\n"))
+	writeTreeFile(t, repository, "parent/vendor/library/source.go", []byte("package library\n"))
+	writeTreeFile(t, repository, "parent/nested/go.mod", []byte("module example.com/nested\n"))
+	writeTreeFile(t, repository, "parent/nested/source.go", []byte("package nested\n"))
+	writeTreeFile(t, repository, "sibling/go.mod", []byte("module example.com/sibling\n"))
+	writeTreeFile(t, repository, "sibling/source.go", []byte("package sibling\n"))
+	commit := commitCandidateTree(t, repository)
+	writeTreeFile(t, repository, "parent/worktree-only.go", []byte("package parent\n"))
+
+	tree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir: filepath.Join(repository, "parent"),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, tree)
+	var got []string
+	for _, entry := range tree.InputEntries() {
+		got = append(got, entry.Path)
+	}
+	want := []string{
+		"COPYRIGHT", "LICENSE", "docs/oss/attribution.md", "parent/go.mod", "parent/main.go",
+		"parent/vendor/library/go.mod", "parent/vendor/library/source.go",
+	}
+	if strings.Join(got, "\n") != strings.Join(want, "\n") {
+		t.Fatalf("selected inputs = %q, want %q", got, want)
+	}
+	if _, ok := tree.Entry("parent/nested/source.go"); !ok {
+		t.Fatal("full tree lookup lost an excluded nested module destination")
+	}
+	destination, err := tree.ResolveDestination(context.Background(), "parent/main.go", "../sibling/source.go")
+	if err != nil || destination.Kind != DestinationEntry || destination.Path != "sibling/source.go" {
+		t.Fatalf("excluded sibling destination = %#v, %v", destination, err)
+	}
+	nestedDestination, err := tree.ResolveDestination(context.Background(), "parent/main.go", "nested/source.go")
+	if err != nil || nestedDestination.Kind != DestinationEntry || nestedDestination.Path != "parent/nested/source.go" {
+		t.Fatalf("excluded nested-module destination = %#v, %v", nestedDestination, err)
+	}
+	if tree.blobReader != nil || tree.blobReads != 0 {
+		t.Fatalf("metadata-only selection read blob content: reader=%v reads=%d", tree.blobReader != nil, tree.blobReads)
+	}
+}
+
+func TestReadCandidateTreeForRootScopeExcludesNestedModules(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "go.mod", []byte("module example.com/root\n"))
+	writeTreeFile(t, repository, "root.go", []byte("package root\n"))
+	writeTreeFile(t, repository, "nested/go.mod", []byte("module example.com/nested\n"))
+	writeTreeFile(t, repository, "nested/source.go", []byte("package nested\n"))
+	writeTreeFile(t, repository, "vendor/library/go.mod", []byte("not a boundary\n"))
+	writeTreeFile(t, repository, "vendor/library/source.go", []byte("package library\n"))
+	commit := commitCandidateTree(t, repository)
+
+	tree, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{ModuleDir: repository})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, tree)
+	want := []string{"go.mod", "root.go", "vendor/library/go.mod", "vendor/library/source.go"}
+	if got := inputPaths(tree); strings.Join(got, "\n") != strings.Join(want, "\n") {
+		t.Fatalf("root module inputs = %q, want %q", got, want)
+	}
+}
+
+func TestReadCandidateTreeSharedFilesReplaceDefaultsAndDeduplicate(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "LICENSE", []byte("default\n"))
+	writeTreeFile(t, repository, "module/go.mod", []byte("module example.com/module\n"))
+	writeTreeFile(t, repository, "module/source.go", []byte("package module\n"))
+	writeTreeFile(t, repository, "sibling/shared.txt", []byte("selected explicitly\n"))
+	writeTreeFile(t, repository, "literal/*.md", []byte("literal wildcard path\n"))
+	commit := commitCandidateTree(t, repository)
+	moduleDir := filepath.Join(repository, "module")
+
+	selected, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir:   moduleDir,
+		SharedFiles: []string{"sibling/shared.txt", "module/source.go", "sibling/shared.txt"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, selected)
+	var got []string
+	for _, entry := range selected.InputEntries() {
+		got = append(got, entry.Path)
+	}
+	want := []string{"module/go.mod", "module/source.go", "sibling/shared.txt"}
+	if strings.Join(got, "\n") != strings.Join(want, "\n") {
+		t.Fatalf("explicit shared inputs = %q, want %q", got, want)
+	}
+
+	empty, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir:   moduleDir,
+		SharedFiles: []string{},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, empty)
+	if got := inputPaths(empty); strings.Join(got, "\n") != "module/go.mod\nmodule/source.go" {
+		t.Fatalf("explicit empty input set = %q", got)
+	}
+
+	literal, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir:   moduleDir,
+		SharedFiles: []string{"literal/*.md"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, literal)
+	if got := inputPaths(literal); strings.Join(got, "\n") != "literal/*.md\nmodule/go.mod\nmodule/source.go" {
+		t.Fatalf("literal wildcard path inputs = %q", got)
+	}
+}
+
+func TestReadCandidateTreeDefaultsAreOptionalAndExplicitMissingFilesFail(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "module/go.mod", []byte("module example.com/module\n"))
+	writeTreeFile(t, repository, "module/source.go", []byte("package module\n"))
+	writeTreeFile(t, repository, "LICENSE", []byte("license\n"))
+	commit := commitCandidateTree(t, repository)
+	moduleDir := filepath.Join(repository, "module")
+
+	defaults, err := ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{ModuleDir: moduleDir})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, defaults)
+	if got := inputPaths(defaults); strings.Join(got, "\n") != "LICENSE\nmodule/go.mod\nmodule/source.go" {
+		t.Fatalf("default shared inputs = %q", got)
+	}
+
+	writeTreeFile(t, repository, "missing.md", []byte("present only in the worktree\n"))
+	_, err = ReadCandidateTreeForScope(context.Background(), repository, commit, TreeScope{
+		ModuleDir:   moduleDir,
+		SharedFiles: []string{"missing.md"},
+	})
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != SharedFiles || len(failure.Findings) != 1 || failure.Findings[0].Path != "missing.md" {
+		t.Fatalf("missing explicit shared file error = %#v, want path-specific shared-files failure", err)
+	}
+}
+
+func TestSharedFileSelectionPreservesLiteralBackslash(t *testing.T) {
+	if filepath.Separator == '\\' {
+		t.Skip("backslash is a filesystem separator on this platform")
+	}
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "module/go.mod", []byte("module example.com/module\n"))
+	const name = `docs/notice\copy.txt`
+	contents := []byte("literal filename\n")
+	writeTreeFile(t, repository, name, contents)
+	commit := commitCandidateTree(t, repository)
+	moduleDir := filepath.Join(repository, "module")
+	tree, err := ReadCandidateTreeForScope(t.Context(), repository, commit, TreeScope{ModuleDir: moduleDir, SharedFiles: []string{name, name}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	cleanupCandidateTree(t, tree)
+	if got := inputPaths(tree); strings.Join(got, "\n") != name+"\nmodule/go.mod" {
+		t.Fatalf("literal selection = %q", got)
+	}
+	read, err := tree.ReadFile(t.Context(), name)
+	if err != nil || string(read) != string(contents) {
+		t.Fatalf("literal file content = %q, error = %v", read, err)
+	}
+	for _, invalid := range []string{"../outside", "/absolute", "docs"} {
+		if _, err := ReadCandidateTreeForScope(t.Context(), repository, commit, TreeScope{ModuleDir: moduleDir, SharedFiles: []string{invalid}}); err == nil {
+			t.Fatalf("shared selection accepted %q", invalid)
+		}
+	}
+}
+
+func TestRunBuildsInputsOnlyForChecksOrExplicitSharedFiles(t *testing.T) {
+	repository := newTreeRepository(t)
+	writeTreeFile(t, repository, "go.mod", []byte("module example.com/validation-tree\n\ngo 1.25.0\n"))
+	writeTreeFile(t, repository, "main.go", []byte("package validationtree\n"))
+	commit := commitCandidateTree(t, repository)
+	gitPath, err := exec.LookPath("git")
+	if err != nil {
+		t.Fatal(err)
+	}
+	bin := filepath.Join(t.TempDir(), "bin")
+	if err := os.MkdirAll(bin, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	logPath := filepath.Join(t.TempDir(), "tree-reads")
+	wrapper := "#!/bin/sh\nREAL_GIT='" + gitPath + "'\nLOG='" + logPath + "'\nfor ARG in \"$@\"; do [ \"$ARG\" = ls-tree ] && echo read >> \"$LOG\"; done\nexec \"$REAL_GIT\" \"$@\"\n"
+	if err := os.WriteFile(filepath.Join(bin, "git"), []byte(wrapper), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("PATH", bin+string(os.PathListSeparator)+os.Getenv("PATH"))
+
+	if err := Run(context.Background(), Request{RepositoryDir: repository, Commit: commit}); err != nil {
+		t.Fatalf("metadata-only Run(): %v", err)
+	}
+	if _, err := os.Stat(logPath); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("default-only request constructed file inputs: stat error=%v", err)
+	}
+
+	err = Run(context.Background(), Request{
+		RepositoryDir: repository,
+		Commit:        commit,
+		Settings:      Settings{SharedFiles: []string{"missing.txt"}},
+	})
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != SharedFiles || len(failure.Findings) != 1 || failure.Findings[0].Path != "missing.txt" {
+		t.Fatalf("explicit missing shared file Run() error = %#v", err)
+	}
+	if data, err := os.ReadFile(logPath); err != nil || len(data) == 0 {
+		t.Fatalf("explicit shared-file request did not construct committed file inputs: %q, %v", data, err)
+	}
+}
+
+func inputPaths(tree *CandidateTree) []string {
+	entries := tree.InputEntries()
+	paths := make([]string, 0, len(entries))
+	for _, entry := range entries {
+		paths = append(paths, entry.Path)
+	}
+	return paths
+}
+
 func TestReadFileReturnsOwnedBytesAndCachesOnlySymlinkTargets(t *testing.T) {
 	repository := newTreeRepository(t)
 	writeTreeFile(t, repository, "source.txt", []byte("committed content"))

internal/validation/validation.go

@@ -4,6 +4,7 @@ package validation
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"go/format"
 	"io"
@@ -19,6 +20,7 @@ type Settings struct {
 	Race               bool
 	FullVet            bool
 	CompileTargets     []Target
+	SharedFiles        []string
 	GoFormat           bool
 	Markdown           *MarkdownSettings
 	ModuleDistribution ModuleDistributionSettings
@@ -51,15 +53,20 @@ type Target struct {
 // Request identifies the captured source and output used by shared validation.
 type Request struct {
 	RepositoryDir string
+	ModuleDir     string
 	Commit        string
 	Output        io.Writer
 	Settings      Settings
+	ToolOwner     *gotool.Owner
 }
 
 // ReadCandidateTree loads the committed-file inventory when a selected check
 // needs file-oriented input.
 func (request Request) ReadCandidateTree(ctx context.Context) (*CandidateTree, error) {
-	return ReadCandidateTree(ctx, request.RepositoryDir, request.Commit)
+	return ReadCandidateTreeForScope(ctx, request.RepositoryDir, request.Commit, TreeScope{
+		ModuleDir:   request.ModuleDir,
+		SharedFiles: request.Settings.SharedFiles,
+	})
 }
 
 // Run executes shared validation for the captured candidate.
@@ -81,7 +88,15 @@ func Run(ctx context.Context, request Request) (result error) {
 			}
 		}
 	}
-	tool, err := gotool.New(ctx, request.RepositoryDir)
+	goDirectory := request.ModuleDir
+	if goDirectory == "" {
+		goDirectory = request.RepositoryDir
+	}
+	owner := request.ToolOwner
+	if owner == nil {
+		owner = gotool.NewOwner(goDirectory)
+	}
+	tool, err := owner.Acquire(ctx)
 	if err != nil {
 		return &Failure{Check: GoTest, Cause: err}
 	}
@@ -93,19 +108,19 @@ func Run(ctx context.Context, request Request) (result error) {
 		args = append(args, "-vet=off")
 	}
 	args = append(args, "./...")
-	err = tool.Run(ctx, request.RepositoryDir, gotool.Native, gotool.Target{}, request.Output, args...)
+	err = tool.Run(ctx, goDirectory, gotool.Native, gotool.Target{}, request.Output, args...)
 	if err != nil {
 		return &Failure{Check: GoTest, Cause: err}
 	}
 	if request.Settings.FullVet {
-		err = tool.Run(ctx, request.RepositoryDir, gotool.Native, gotool.Target{}, request.Output, "vet", "-mod=readonly", "./...")
+		err = tool.Run(ctx, goDirectory, gotool.Native, gotool.Target{}, request.Output, "vet", "-mod=readonly", "./...")
 		if err != nil {
 			return &Failure{Check: GoVet, Cause: err}
 		}
 	}
 	for _, target := range request.Settings.CompileTargets {
 		selected := gotool.Target{OS: target.OS, Arch: target.Arch}
-		err = tool.Run(ctx, request.RepositoryDir, gotool.Static, selected, request.Output,
+		err = tool.Run(ctx, goDirectory, gotool.Static, selected, request.Output,
 			"build", "-mod=readonly", "-o", os.DevNull, "./...")
 		if err != nil {
 			return &Failure{
@@ -118,9 +133,14 @@ func Run(ctx context.Context, request Request) (result error) {
 			}
 		}
 	}
-	if request.Settings.GoFormat || request.Settings.ModuleDistribution.WorkspaceFiles || request.Settings.ModuleDistribution.LocalReplacements || request.Settings.FileSize != nil || request.Settings.Markdown != nil {
+	needsSharedSelection := len(request.Settings.SharedFiles) != 0
+	if request.Settings.GoFormat || request.Settings.ModuleDistribution.WorkspaceFiles || request.Settings.ModuleDistribution.LocalReplacements || request.Settings.FileSize != nil || request.Settings.Markdown != nil || needsSharedSelection {
 		tree, err := request.ReadCandidateTree(ctx)
 		if err != nil {
+			var failure *Failure
+			if errors.As(err, &failure) {
+				return failure
+			}
 			check := MarkdownLinks
 			if request.Settings.FileSize != nil {
 				check = FileSize
@@ -137,6 +157,7 @@ func Run(ctx context.Context, request Request) (result error) {
 			return &Failure{Check: check, Cause: err}
 		}
 		lastContentCheck := Check("")
+		fileSizeSettings := fileSizeSettingsForModule(request.Settings.FileSize, tree.modulePath)
 		defer func() {
 			if closeErr := tree.Close(); closeErr != nil && result == nil && lastContentCheck != "" {
 				result = &Failure{
@@ -169,7 +190,7 @@ func Run(ctx context.Context, request Request) (result error) {
 			}
 		}
 		if request.Settings.FileSize != nil {
-			if err := checkFileSize(tree, request.Settings.FileSize); err != nil {
+			if err := checkFileSize(ctx, tree, fileSizeSettings); err != nil {
 				return err
 			}
 		}
@@ -188,7 +209,7 @@ func Run(ctx context.Context, request Request) (result error) {
 
 func checkWorkspaceFiles(tree *CandidateTree) error {
 	var findings []Finding
-	for _, entry := range tree.Entries() {
+	for _, entry := range tree.inputEntries {
 		if entry.Type != "blob" {
 			continue
 		}
@@ -209,7 +230,7 @@ func checkWorkspaceFiles(tree *CandidateTree) error {
 func checkGoFormat(ctx context.Context, tree *CandidateTree) error {
 	var findings []Finding
 	formattedByObjectID := make(map[string]bool)
-	for _, entry := range tree.Entries() {
+	for _, entry := range tree.inputEntries {
 		if entry.Type != "blob" || (entry.Mode != "100644" && entry.Mode != "100755") || !strings.HasSuffix(entry.Path, ".go") {
 			continue
 		}

internal/validation/workspace_test.go

@@ -9,13 +9,14 @@ import (
 )
 
 func TestCheckWorkspaceFilesReportsCommittedBlobNames(t *testing.T) {
-	tree := &CandidateTree{entries: []git.TreeEntry{
+	entries := []git.TreeEntry{
 		{Path: "go.work", Type: "blob", Mode: "100644"},
 		{Path: "nested/go.work.sum", Type: "blob", Mode: "100644"},
 		{Path: "vendor/nested/link/go.work", Type: "blob", Mode: "120000"},
 		{Path: "nested/not-go.work.backup", Type: "blob", Mode: "100644"},
 		{Path: "submodule/go.work", Type: "commit", Mode: "160000"},
-	}}
+	}
+	tree := &CandidateTree{entries: entries, inputEntries: entries}
 	err := checkWorkspaceFiles(tree)
 	failure, ok := err.(*Failure)
 	if !ok || failure.Check != WorkspaceFiles {
@@ -43,10 +44,11 @@ func TestCheckWorkspaceFilesReportsCommittedBlobNames(t *testing.T) {
 }
 
 func TestCheckWorkspaceFilesAllowsOtherNames(t *testing.T) {
-	tree := &CandidateTree{entries: []git.TreeEntry{
+	entries := []git.TreeEntry{
 		{Path: "go.mod", Type: "blob", Mode: "100644"},
 		{Path: "examples/go.work.example", Type: "blob", Mode: "100644"},
-	}}
+	}
+	tree := &CandidateTree{entries: entries, inputEntries: entries}
 	if err := checkWorkspaceFiles(tree); err != nil {
 		t.Fatalf("checkWorkspaceFiles error = %v, want no findings", err)
 	}

performance_delivery_test.go

@@ -47,8 +47,9 @@ type deliveryBenchmarkIdentity struct {
 func BenchmarkPerformanceFacadeDeliver(b *testing.B) {
 	repository, build, expected := newDeliveryBenchmarkFixture(b)
 	state := &deliveryBenchmarkServer{commit: gitText(b, repository, "rev-parse", "HEAD"), assets: expected}
-	server := httptest.NewServer(http.HandlerFunc(state.serveHTTP))
-	state.baseURL = server.URL
+	server := httptest.NewUnstartedServer(http.HandlerFunc(state.serveHTTP))
+	state.baseURL = "http://" + server.Listener.Addr().String()
+	server.Start()
 	b.Cleanup(server.Close)
 	request := releasekit.DeliveryRequest{
 		RepositoryDir: repository,
@@ -102,7 +103,7 @@ func BenchmarkPerformanceFacadeDeliver(b *testing.B) {
 	})
 }
 
-func newDeliveryBenchmarkFixture(b *testing.B) (string, releasekit.BuildResult, []deliveryBenchmarkAsset) {
+func newDeliveryBenchmarkFixture(b testing.TB) (string, releasekit.BuildResult, []deliveryBenchmarkAsset) {
 	b.Helper()
 	repository := filepath.Join(b.TempDir(), "repository")
 	if err := os.MkdirAll(repository, 0o755); err != nil {
@@ -111,6 +112,7 @@ func newDeliveryBenchmarkFixture(b *testing.B) (string, releasekit.BuildResult,
 	gitRun(b, repository, "init", "-b", "main")
 	gitRun(b, repository, "config", "user.name", "ReleaseKit Benchmark")
 	gitRun(b, repository, "config", "user.email", "benchmark@example.invalid")
+	writeFile(b, repository, "go.mod", "module example.com/deliveryfixture\n\ngo 1.26.0\n")
 	writeFile(b, repository, "docs/releases/v1.2.3.md", "# Sample App v1.2.3\n\nDelivery fixture.\n")
 	gitRun(b, repository, "add", ".")
 	gitRun(b, repository, "commit", "-m", "prepare delivery benchmark")
@@ -129,6 +131,7 @@ func newDeliveryBenchmarkFixture(b *testing.B) (string, releasekit.BuildResult,
 	targets := []releasekit.Target{{OS: "linux", Arch: "amd64"}, {OS: "windows", Arch: "amd64"}}
 	build := releasekit.BuildResult{
 		RepositoryDir: repository, CandidateCommit: gitText(b, repository, "rev-parse", "HEAD"),
+		ModuleDir: repository, ModulePath: "example.com/deliveryfixture", Tag: "v1.2.3",
 		SourceVerified: true, Version: "v1.2.3", MainPackage: "./cmd/app",
 		BinaryName: "releasekit", Targets: targets, OutputDir: outputDir,
 	}
@@ -173,7 +176,7 @@ func (state *deliveryBenchmarkServer) reset(populated bool) {
 	}
 }
 
-func (state *deliveryBenchmarkServer) verifyUploads(b *testing.B) {
+func (state *deliveryBenchmarkServer) verifyUploads(b testing.TB) {
 	b.Helper()
 	state.mu.Lock()
 	defer state.mu.Unlock()

preparation.go

@@ -2,39 +2,62 @@ package releasekit
 
 import (
 	"context"
+	"errors"
+	"fmt"
+	"strings"
 
 	internalpreparation "gitea.maximumdirect.net/eric/ReleaseKit/internal/preparation"
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/releaseidentity"
 )
 
-// TaggedCheckoutRequest selects a stable tag and the full Git object ID
-// expected by an external build or CI event. An empty Remote selects origin.
+// TaggedCheckoutRequest selects a full Git tag and the Git object ID expected
+// by an external build or CI event. An empty Remote selects origin.
 type TaggedCheckoutRequest struct {
 	RepositoryDir  string
-	Version        string
+	Tag            string
 	Remote         string
 	ExpectedCommit string
+	// VerifyOnly checks an already prepared checkout without fetching or checking out.
+	VerifyOnly bool
 }
 
-// PrepareTaggedCheckout fetches Version from Remote, verifies that its peeled
-// commit matches ExpectedCommit, and checks out that commit detached. This
-// operation mutates the selected local repository; use it for disposable
-// checkouts where tag-fetch and checkout conflicts can be resolved by the
-// caller. It does not publish a tag or hosted content.
+// PrepareTaggedCheckout fetches Tag from Remote, verifies that its peeled
+// commit matches ExpectedCommit, and checks out that commit detached. When
+// VerifyOnly is true, it performs the same tag, HEAD, and cleanliness checks
+// without fetching or changing the checkout. It does not publish a tag or
+// hosted content.
 func PrepareTaggedCheckout(ctx context.Context, request TaggedCheckoutRequest) error {
 	return internalpreparation.PrepareTaggedCheckout(ctx, internalpreparation.TaggedCheckoutRequest{
 		RepositoryDir:  request.RepositoryDir,
-		Version:        request.Version,
+		Tag:            request.Tag,
 		Remote:         request.Remote,
 		ExpectedCommit: request.ExpectedCommit,
+		VerifyOnly:     request.VerifyOnly,
 	})
 }
 
-// PrepareBuildDependencies runs `go mod download` in repositoryDir with
+// DependencyPreparationRequest selects the repository module whose dependencies
+// should be prepared.
+type DependencyPreparationRequest struct {
+	RepositoryDir string
+	// ModuleDir selects a repository-relative module directory; empty selects
+	// the repository root.
+	ModuleDir string
+}
+
+// PrepareBuildDependencies runs `go mod download` in the selected module with
 // workspace discovery disabled and the locally available compatible Go
 // toolchain selected. It may access module networks and updates the Go module
 // cache using the caller's Go proxy, private-module, credential, and cache
 // settings. If required checksums are missing, the Go command may update
 // go.sum. Cancellation and Go command failures are returned to the caller.
-func PrepareBuildDependencies(ctx context.Context, repositoryDir string) error {
-	return internalpreparation.PrepareBuildDependencies(ctx, repositoryDir)
+func PrepareBuildDependencies(ctx context.Context, request DependencyPreparationRequest) error {
+	if strings.TrimSpace(request.RepositoryDir) == "" {
+		return errors.New("repository directory is required")
+	}
+	selection, err := releaseidentity.ResolveSelection(request.RepositoryDir, request.ModuleDir)
+	if err != nil {
+		return fmt.Errorf("resolve dependency preparation module: %w", err)
+	}
+	return internalpreparation.PrepareBuildDependencies(ctx, selection.ModuleDir)
 }

preparation_test.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
@@ -18,7 +19,7 @@ func TestPrepareTaggedCheckoutFetchesExpectedCommitAndDetaches(t *testing.T) {
 
 	if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
 		RepositoryDir:  repository,
-		Version:        "v1.2.3",
+		Tag:            "v1.2.3",
 		ExpectedCommit: tagCommit,
 	}); err != nil {
 		t.Fatal(err)
@@ -31,6 +32,22 @@ func TestPrepareTaggedCheckoutFetchesExpectedCommitAndDetaches(t *testing.T) {
 	}
 }
 
+func TestPrepareTaggedCheckoutAcceptsNestedFullTag(t *testing.T) {
+	repository := newTaggedDeliveryConsumer(t)
+	tag := "integrations/ckconfig/v1.2.3"
+	tagCommit := publishPreparationTagNamed(t, repository, tag)
+	advancePreparationCheckout(t, repository, "later local commit")
+
+	if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
+		RepositoryDir: repository, Tag: tag, ExpectedCommit: tagCommit,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if head := buildGit(t, repository, "rev-parse", "HEAD"); head != tagCommit {
+		t.Fatalf("prepared HEAD = %s, want %s", head, tagCommit)
+	}
+}
+
 func TestPrepareTaggedCheckoutRejectsWrongCommitBeforeCheckout(t *testing.T) {
 	repository := newTaggedDeliveryConsumer(t)
 	tagCommit := publishPreparationTag(t, repository)
@@ -40,7 +57,7 @@ func TestPrepareTaggedCheckoutRejectsWrongCommitBeforeCheckout(t *testing.T) {
 
 	err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
 		RepositoryDir:  repository,
-		Version:        "v1.2.3",
+		Tag:            "v1.2.3",
 		Remote:         "candidate",
 		ExpectedCommit: currentCommit,
 	})
@@ -67,7 +84,7 @@ func TestPrepareTaggedCheckoutReportsLocalCheckoutConflict(t *testing.T) {
 
 	err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
 		RepositoryDir:  repository,
-		Version:        "v1.2.3",
+		Tag:            "v1.2.3",
 		ExpectedCommit: tagCommit,
 	})
 	if err == nil {
@@ -90,7 +107,7 @@ func TestPrepareTaggedCheckoutReportsConflictingLocalTag(t *testing.T) {
 
 	err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
 		RepositoryDir:  repository,
-		Version:        "v1.2.3",
+		Tag:            "v1.2.3",
 		ExpectedCommit: buildGit(t, repository, "rev-parse", "HEAD~1"),
 	})
 	if err == nil {
@@ -108,9 +125,9 @@ func TestPrepareTaggedCheckoutValidatesInputsBeforeFetching(t *testing.T) {
 	repository := newTaggedDeliveryConsumer(t)
 	publishPreparationTag(t, repository)
 	for _, request := range []releasekit.TaggedCheckoutRequest{
-		{RepositoryDir: repository, Version: "not-a-version", ExpectedCommit: buildGit(t, repository, "rev-parse", "HEAD")},
-		{RepositoryDir: repository, Version: "v1.2.3"},
-		{RepositoryDir: repository, Version: "v1.2.3", ExpectedCommit: "not-an-object-id"},
+		{RepositoryDir: repository, Tag: "not-a-version", ExpectedCommit: buildGit(t, repository, "rev-parse", "HEAD")},
+		{RepositoryDir: repository, Tag: "v1.2.3"},
+		{RepositoryDir: repository, Tag: "v1.2.3", ExpectedCommit: "not-an-object-id"},
 	} {
 		err := releasekit.PrepareTaggedCheckout(context.Background(), request)
 		if err == nil {
@@ -121,27 +138,135 @@ func TestPrepareTaggedCheckoutValidatesInputsBeforeFetching(t *testing.T) {
 		}
 	}
 	if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
-		RepositoryDir: repository, Version: "invalid", ExpectedCommit: "bad",
+		RepositoryDir: repository, Tag: "invalid", ExpectedCommit: "bad",
 	}); !errors.Is(err, releasekit.ErrInvalidVersion) {
 		t.Fatalf("invalid-version error = %v, want ErrInvalidVersion", err)
 	}
 }
 
+func TestPrepareTaggedCheckoutVerifyOnlyIsReadOnly(t *testing.T) {
+	for _, test := range []struct {
+		name   string
+		wrong  bool
+		mutate func(t *testing.T, repository string)
+	}{
+		{name: "wrong expected commit", wrong: true},
+		{name: "dirty checkout", mutate: func(t *testing.T, repository string) {
+			if err := os.WriteFile(filepath.Join(repository, "dirty.txt"), []byte("dirty"), 0o600); err != nil {
+				t.Fatal(err)
+			}
+		}},
+		{name: "missing tag", mutate: func(t *testing.T, repository string) {
+			buildGit(t, repository, "tag", "-d", "v1.2.3")
+		}},
+		{name: "moved tag", mutate: func(t *testing.T, repository string) {
+			advancePreparationCheckout(t, repository, "moved tagged commit")
+			buildGit(t, repository, "tag", "--force", "v1.2.3")
+		}},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			repository := newTaggedDeliveryConsumer(t)
+			tagCommit := publishPreparationTag(t, repository)
+			if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
+				RepositoryDir: repository, Tag: "v1.2.3", ExpectedCommit: tagCommit,
+			}); err != nil {
+				t.Fatal(err)
+			}
+			if test.mutate != nil {
+				test.mutate(t, repository)
+			}
+			commit := tagCommit
+			if test.wrong {
+				commit = strings.Repeat("0", len(tagCommit))
+			}
+			if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
+				RepositoryDir: repository, Tag: "v1.2.3", Remote: "missing-remote",
+				ExpectedCommit: commit, VerifyOnly: true,
+			}); err == nil {
+				t.Fatal("VerifyOnly accepted an inconsistent prepared checkout")
+			}
+		})
+	}
+
+	repository := newTaggedDeliveryConsumer(t)
+	tagCommit := publishPreparationTag(t, repository)
+	if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
+		RepositoryDir: repository, Tag: "v1.2.3", ExpectedCommit: tagCommit,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if err := releasekit.PrepareTaggedCheckout(context.Background(), releasekit.TaggedCheckoutRequest{
+		RepositoryDir: repository, Tag: "v1.2.3", Remote: "missing-remote",
+		ExpectedCommit: tagCommit, VerifyOnly: true,
+	}); err != nil {
+		t.Fatalf("VerifyOnly rejected a prepared checkout: %v", err)
+	}
+	if head := buildGit(t, repository, "rev-parse", "HEAD"); head != tagCommit {
+		t.Fatalf("VerifyOnly changed HEAD to %s, want %s", head, tagCommit)
+	}
+	if branch := buildGit(t, repository, "rev-parse", "--abbrev-ref", "HEAD"); branch != "HEAD" {
+		t.Fatalf("VerifyOnly changed checkout branch to %q", branch)
+	}
+}
+
 func TestPrepareBuildDependenciesRequiresRepositoryDirectory(t *testing.T) {
-	if err := releasekit.PrepareBuildDependencies(context.Background(), " "); err == nil {
+	if err := releasekit.PrepareBuildDependencies(context.Background(), releasekit.DependencyPreparationRequest{RepositoryDir: " "}); err == nil {
 		t.Fatal("PrepareBuildDependencies() accepted an empty repository directory")
 	}
 }
 
+func TestPrepareBuildDependenciesUsesSelectedModuleDirectory(t *testing.T) {
+	repository := t.TempDir()
+	moduleDir := filepath.Join(repository, "integrations", "ckconfig")
+	if err := os.MkdirAll(moduleDir, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(filepath.Join(moduleDir, "deep"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("integrations/ckconfig/deep", filepath.Join(repository, "linked")); err != nil {
+		t.Fatal(err)
+	}
+	toolDir := t.TempDir()
+	marker := filepath.Join(t.TempDir(), "go-directory")
+	tool := filepath.Join(toolDir, "go")
+	if err := os.WriteFile(tool, []byte("#!/bin/sh\nprintf '%s' \"$PWD\" > \"$PREPARE_DIR_MARKER\"\n"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("PATH", toolDir+string(os.PathListSeparator)+os.Getenv("PATH"))
+	t.Setenv("PREPARE_DIR_MARKER", marker)
+	for _, selected := range []string{"integrations/ckconfig", "linked/.."} {
+		if err := releasekit.PrepareBuildDependencies(context.Background(), releasekit.DependencyPreparationRequest{
+			RepositoryDir: repository,
+			ModuleDir:     selected,
+		}); err != nil {
+			t.Fatal(err)
+		}
+		got, err := os.ReadFile(marker)
+		if err != nil || string(got) != moduleDir {
+			t.Fatalf("go mod download directory for %q = %q, error=%v, want %q", selected, got, err, moduleDir)
+		}
+	}
+}
+
 func publishPreparationTag(t *testing.T, repository string) string {
 	t.Helper()
+	return publishPreparationTagNamed(t, repository, "v1.2.3")
+}
+
+func publishPreparationTagNamed(t *testing.T, repository, tag string) string {
+	t.Helper()
+	ref := "refs/tags/" + tag
+	if _, err := buildGitOutput(repository, "show-ref", "--verify", "--quiet", ref); err != nil {
+		buildGit(t, repository, "tag", tag)
+	}
 	remoteDir := t.TempDir()
 	remote := filepath.Join(remoteDir, "origin.git")
 	buildGit(t, remoteDir, "init", "--bare", remote)
 	buildGit(t, repository, "remote", "add", "origin", remote)
-	commit := buildGit(t, repository, "rev-parse", "refs/tags/v1.2.3^{commit}")
-	buildGit(t, repository, "push", "origin", "refs/tags/v1.2.3")
-	buildGit(t, repository, "tag", "-d", "v1.2.3")
+	commit := buildGit(t, repository, "rev-parse", ref+"^{commit}")
+	buildGit(t, repository, "push", "origin", ref)
+	buildGit(t, repository, "tag", "-d", tag)
 	return commit
 }