test(github): add tests for all exported methods in methods.go

Tests cover: GetPullRequest, GetPullRequestDiff, GetPullRequestFiles, GetCommitStatuses, GetFileContent, GetFileContentRef, ListContents, ListContents(dot), PostReview (APPROVED→APPROVE normalization), ListReviews, GetAuthenticatedUser, RequestReviewer, EditComment, ListReviewComments, DeleteReview, GetAllFilesInPath, ResolveComment (no-op), GetTimelineReviewCommentIDForReview (pass-through).
feat(ci): add GitHub Actions workflow for strat/review-bot PRs
2026-05-14 20:24:17 +00:00 · 2026-05-14 20:21:16 +00:00 · 2026-05-14 20:21:12 +00:00 · 2026-05-14 20:15:32 +00:00 · 2026-05-14 20:15:25 +00:00 · 2026-05-14 20:15:17 +00:00
12 changed files with 1532 additions and 1749 deletions
@@ -0,0 +1,77 @@
+name: AI Code Review
+
+# AI code review for pull requests on github.concur.com/strat/review-bot.
+# Uses SAP AI Core as the LLM provider (same as the Gitea CI workflow).
+#
+# Prerequisites before this workflow can run:
+#   1. Set required secrets on strat/review-bot (see list below)
+#   2. Publish at least one release of review-bot on strat/review-bot
+#      (or change action-repo to a repo that already has releases)
+#
+# Required secrets:
+#   SONNET_REVIEW_TOKEN  — GitHub token for the Sonnet reviewer bot
+#   GPT_REVIEW_TOKEN     — GitHub token for the GPT reviewer bot
+#   AICORE_CLIENT_ID     — SAP AI Core OAuth client ID
+#   AICORE_CLIENT_SECRET — SAP AI Core OAuth client secret
+#   AICORE_AUTH_URL      — SAP AI Core OAuth token endpoint
+#   AICORE_API_URL       — SAP AI Core inference API URL
+#   AICORE_RESOURCE_GROUP — SAP AI Core resource group (optional, default: default)
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  test:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.26'
+      - run: go test ./...
+      - run: go vet ./...
+      - run: go build -o review-bot ./cmd/review-bot
+
+  review:
+    runs-on: ubuntu-24.04
+    if: github.event_name == 'pull_request'
+    needs: test
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: sonnet
+            token_secret: SONNET_REVIEW_TOKEN
+            model: anthropic--claude-4.6-sonnet
+          - name: gpt
+            token_secret: GPT_REVIEW_TOKEN
+            model: gpt-5
+          - name: security
+            token_secret: GPT_REVIEW_TOKEN
+            model: gpt-5
+            system_prompt_file: SECURITY_REVIEW.md
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.gitea/actions/review
+        with:
+          # On GHES runners, vcs-url is ignored; the composite action uses github.server_url.
+          # action-repo must be a repo with published review-bot releases.
+          # Requires strat/review-bot to have at least one release tag with
+          # review-bot-linux-amd64 and checksums.txt assets.
+          vcs-url: https://gitea.weiker.me
+          action-repo: strat/review-bot
+          reviewer-token: ${{ secrets[matrix.token_secret] }}
+          reviewer-name: ${{ matrix.name }}
+          llm-provider: aicore
+          llm-model: ${{ matrix.model }}
+          aicore-client-id: ${{ secrets.AICORE_CLIENT_ID }}
+          aicore-client-secret: ${{ secrets.AICORE_CLIENT_SECRET }}
+          aicore-auth-url: ${{ secrets.AICORE_AUTH_URL }}
+          aicore-api-url: ${{ secrets.AICORE_API_URL }}
+          aicore-resource-group: ${{ secrets.AICORE_RESOURCE_GROUP }}
+          conventions-file: CONVENTIONS.md
+          patterns-repo: rodin/go-patterns
+          patterns-files: README.md,patterns/
+          timeout: "600"
+          system-prompt-file: ${{ matrix.system_prompt_file || '' }}
@@ -14,10 +14,8 @@ import (

 	"gitea.weiker.me/rodin/review-bot/budget"
 	"gitea.weiker.me/rodin/review-bot/gitea"
-	"gitea.weiker.me/rodin/review-bot/github"
 	"gitea.weiker.me/rodin/review-bot/llm"
 	"gitea.weiker.me/rodin/review-bot/review"
-	"gitea.weiker.me/rodin/review-bot/vcs"
 )

 var version = "dev"
@@ -86,7 +84,6 @@ func main() {
 	systemPromptFile := flag.String("system-prompt-file", envOrDefault("SYSTEM_PROMPT_FILE", ""), "Local file with additional system prompt instructions")
 	patternsRepo := flag.String("patterns-repo", envOrDefault("PATTERNS_REPO", ""), "Repo with language patterns (e.g. rodin/elixir-patterns)")
 	patternsFiles := flag.String("patterns-files", envOrDefault("PATTERNS_FILES", ""), "Comma-separated file paths to fetch from patterns repo (empty = all files)")
-	vcsType := flag.String("vcs-type", envOrDefault("VCS_TYPE", "gitea"), "VCS type: gitea or github")
 	dryRun := flag.Bool("dry-run", false, "Print review to stdout instead of posting")
 	llmTemp := flag.Float64("llm-temperature", envOrDefaultFloat("LLM_TEMPERATURE", 0), "LLM temperature (0 = server default)")
 	llmTimeout := flag.Int("llm-timeout", envOrDefaultInt("LLM_TIMEOUT", 300), "LLM request timeout in seconds (default 300)")
@@ -171,19 +168,12 @@ func main() {
 		os.Exit(1)
 	}

-	// Initialize VCS client
-	var vcsClientImpl vcsClient
-	switch strings.ToLower(*vcsType) {
-	case "github":
-		vcsClientImpl = newGitHubVCSAdapter(github.NewClient(*reviewerToken, *vcsURL))
-		slog.Info("using GitHub VCS client", "url", *vcsURL)
-	case "gitea", "":
-		vcsClientImpl = newGiteaVCSAdapter(gitea.NewClient(*vcsURL, *reviewerToken))
-		slog.Info("using Gitea VCS client", "url", *vcsURL)
-	default:
-		slog.Error("invalid vcs-type", "type", *vcsType, "valid", "gitea, github")
-		os.Exit(1)
-	}
+	// Detect VCS type and initialize the appropriate client.
+	vcsType := detectVCSType()
+	slog.Info("detected VCS type", "vcs", vcsType)
+
+	// Initialize clients
+	giteaClient := newVCSClient(vcsType, *vcsURL, *reviewerToken)
 	llmClient := llm.NewClient(*llmBaseURL, *llmAPIKey, *llmModel)
 	if *llmTemp < 0 || *llmTemp > 2 {
 		slog.Error("invalid LLM temperature", "temperature", *llmTemp, "range", "0-2")
@@ -221,7 +211,7 @@ func main() {
 	var persona *review.Persona
 	if *personaName != "" {
 		// Try loading from repo first, then fall back to built-in
-		repoPersonas, err := review.LoadRepoPersonas(ctx, newReviewClientAdapter(vcsClientImpl), owner, repoName)
+		repoPersonas, err := review.LoadRepoPersonas(ctx, buildRepoPersonaClient(giteaClient), owner, repoName)
 		if err != nil {
 			slog.Warn("could not load repo personas", "repo", owner+"/"+repoName, "error", err)
 			// Continue with built-in personas only.
@@ -257,7 +247,7 @@ func main() {
 	slog.Info("reviewing pull request", "pr", prNumber, "repo", fmt.Sprintf("%s/%s", owner, repoName))

 	// Step 1: Fetch PR metadata
-	pr, err := vcsClientImpl.GetPullRequest(ctx, owner, repoName, prNumber)
+	pr, err := giteaClient.GetPullRequest(ctx, owner, repoName, prNumber)
 	if err != nil {
 		slog.Error("failed to fetch PR", "pr", prNumber, "error", err)
 		os.Exit(1)
@@ -265,7 +255,7 @@ func main() {
 	slog.Info("fetched PR metadata", "pr", prNumber, "title", pr.Title)

 	// Step 2: Fetch diff
-	diff, err := vcsClientImpl.GetPullRequestDiff(ctx, owner, repoName, prNumber)
+	diff, err := giteaClient.GetPullRequestDiff(ctx, owner, repoName, prNumber)
 	if err != nil {
 		slog.Error("failed to fetch diff", "pr", prNumber, "error", err)
 		os.Exit(1)
@@ -274,21 +264,21 @@ func main() {

 	// Step 3: Fetch full file content for modified files
 	fileContext := ""
-	files, err := vcsClientImpl.GetPullRequestFiles(ctx, owner, repoName, prNumber)
+	files, err := giteaClient.GetPullRequestFiles(ctx, owner, repoName, prNumber)
 	if err != nil {
 		slog.Warn("could not fetch PR files list", "pr", prNumber, "error", err)
 	} else {
-		fileContext = fetchFileContext(ctx, vcsClientImpl, owner, repoName, pr.HeadRef, files)
+		fileContext = fetchFileContext(ctx, giteaClient, owner, repoName, pr.Head.Ref, files)
 		slog.Debug("fetched file context", "files", len(files))
 	}

 	// Step 4: Check CI status
 	ciPassed := true
 	ciDetails := ""
-	if pr.HeadSha != "" {
-		statuses, err := vcsClientImpl.GetCommitStatuses(ctx, owner, repoName, pr.HeadSha)
+	if pr.Head.Sha != "" {
+		statuses, err := giteaClient.GetCommitStatuses(ctx, owner, repoName, pr.Head.Sha)
 		if err != nil {
-			slog.Warn("could not fetch CI status", "sha", pr.HeadSha, "error", err)
+			slog.Warn("could not fetch CI status", "sha", pr.Head.Sha, "error", err)
 		} else {
 			ciPassed, ciDetails = evaluateCIStatus(statuses)
 			slog.Info("CI status checked", "passed", ciPassed)
@@ -298,7 +288,7 @@ func main() {
 	// Step 5: Load conventions file if specified
 	conventions := ""
 	if *conventionsFile != "" {
-		content, err := vcsClientImpl.GetFileContent(ctx, owner, repoName, *conventionsFile)
+		content, err := giteaClient.GetFileContent(ctx, owner, repoName, *conventionsFile)
 		if err != nil {
 			slog.Warn("could not load conventions file", "file", *conventionsFile, "error", err)
 		} else {
@@ -310,7 +300,7 @@ func main() {
 	// Step 6: Load patterns from external repo if specified
 	patterns := ""
 	if *patternsRepo != "" {
-		patterns = fetchPatterns(ctx, vcsClientImpl, *patternsRepo, *patternsFiles)
+		patterns = fetchPatterns(ctx, giteaClient, *patternsRepo, *patternsFiles)
 		slog.Debug("loaded patterns", "repo", *patternsRepo, "bytes", len(patterns))
 	}

@@ -403,15 +393,15 @@ func main() {
 	}

 	// Add commit footer so readers know which commit was evaluated
-	if pr.HeadSha != "" {
-		shortSHA := pr.HeadSha
+	if pr.Head.Sha != "" {
+		shortSHA := pr.Head.Sha
 		if len(shortSHA) > 8 {
 			shortSHA = shortSHA[:8]
 		}
 		reviewBody += fmt.Sprintf("\n\n---\n*Evaluated against %s*", shortSHA)
 	}

-	event := verdictToVCSEvent(result.Verdict)
+	event := review.GiteaEvent(result.Verdict)

 	if *dryRun {
 		fmt.Println("--- DRY RUN ---")
@@ -423,14 +413,14 @@ func main() {
 	sentinel := fmt.Sprintf("<!-- review-bot:%s -->", *reviewerName)

 	// Stale check: verify HEAD hasn't moved since we started
-	evaluatedSHA := pr.HeadSha
+	evaluatedSHA := pr.Head.Sha
 	var currentSHA string
-	currentPR, err := vcsClientImpl.GetPullRequest(ctx, owner, repoName, prNumber)
+	currentPR, err := giteaClient.GetPullRequest(ctx, owner, repoName, prNumber)
 	if err != nil {
 		slog.Warn("could not re-fetch PR for stale check", "pr", prNumber, "error", err)
 		// currentSHA stays empty — shouldSkipStaleReview will return false
 	} else {
-		currentSHA = currentPR.HeadSha
+		currentSHA = currentPR.Head.Sha
 	}
 	if shouldSkipStaleReview(evaluatedSHA, currentSHA) {
 		slog.Warn("HEAD moved during review — skipping stale review",
@@ -441,30 +431,28 @@ func main() {
 	}

 	// Map findings to inline comments for lines present in the diff
-	var inlineComments []vcs.ReviewComment
-	if ext, ok := vcsClientImpl.(giteaExtendedClient); ok {
-		diffRanges := ext.ParseDiffNewLines(diff)
-		for _, f := range result.Findings {
-			if f.File != "" && f.Line > 0 && diffRanges.Contains(f.File, f.Line) {
-				inlineComments = append(inlineComments, vcs.ReviewComment{
-					Path:     f.File,
-					Position: f.Line,
-					Body:     fmt.Sprintf("**[%s]** %s", f.Severity, f.Finding),
-				})
-			}
-		}
-		if len(inlineComments) > 0 {
-			slog.Debug("attaching inline comments", "count", len(inlineComments))
+	diffRanges := gitea.ParseDiffNewLines(diff)
+	var inlineComments []gitea.ReviewComment
+	for _, f := range result.Findings {
+		if f.File != "" && f.Line > 0 && diffRanges.Contains(f.File, f.Line) {
+			inlineComments = append(inlineComments, gitea.ReviewComment{
+				Path:        f.File,
+				NewPosition: int64(f.Line),
+				Body:        fmt.Sprintf("**[%s]** %s", f.Severity, f.Finding),
+			})
 		}
 	}
+	if len(inlineComments) > 0 {
+		slog.Debug("attaching inline comments", "count", len(inlineComments))
+	}

 	// --- Review update strategy ---
 	// 1. POST new review first (gets non-stale approval badge on HEAD)
 	// 2. Then supersede old review with link to the new one
 	// Order matters: post first so we have the new review's URL for the supersede message.
-	var oldReviews []reviewInfo
+	var oldReviews []gitea.Review
 	if *reviewerName != "" {
-		existingReviews, err := vcsClientImpl.ListReviews(ctx, owner, repoName, prNumber)
+		existingReviews, err := giteaClient.ListReviews(ctx, owner, repoName, prNumber)
 		if err != nil {
 			slog.Warn("could not list existing reviews", "pr", prNumber, "error", err)
 		} else {
@@ -477,27 +465,20 @@ func main() {
 	}

 	// Self-request as reviewer (ensures we appear in required-reviewer checks)
-	authUser, err := vcsClientImpl.GetAuthenticatedUser(ctx)
+	authUser, err := giteaClient.GetAuthenticatedUser(ctx)
 	if err != nil {
 		slog.Warn("could not determine authenticated user for reviewer self-request", "error", err)
 	} else if authUser != "" {
-		if ext, ok := vcsClientImpl.(giteaExtendedClient); ok {
-			if err := ext.RequestReviewer(ctx, owner, repoName, prNumber, authUser); err != nil {
-				slog.Warn("could not self-request as reviewer", "user", authUser, "error", err)
-			} else {
-				slog.Debug("self-requested as reviewer", "user", authUser, "pr", prNumber)
-			}
+		if err := giteaClient.RequestReviewer(ctx, owner, repoName, prNumber, authUser); err != nil {
+			slog.Warn("could not self-request as reviewer", "user", authUser, "error", err)
+		} else {
+			slog.Debug("self-requested as reviewer", "user", authUser, "pr", prNumber)
 		}
 	}

 	// POST new review
 	slog.Info("posting review", "event", event, "pr", prNumber)
-	posted, err := vcsClientImpl.PostReview(ctx, owner, repoName, prNumber, vcs.ReviewRequest{
-		Body:     reviewBody,
-		Event:    event,
-		CommitID: evaluatedSHA,
-		Comments: inlineComments,
-	})
+	posted, err := giteaClient.PostReview(ctx, owner, repoName, prNumber, event, reviewBody, evaluatedSHA, inlineComments)
 	if err != nil {
 		slog.Error("failed to post review", "pr", prNumber, "event", event, "error", err)
 		os.Exit(1)
@@ -507,26 +488,21 @@ func main() {
 	// Supersede all old reviews with link to the new one
 	if len(oldReviews) > 0 {
 		newReviewURL := fmt.Sprintf("%s/%s/%s/pulls/%d#pullrequestreview-%d", strings.TrimRight(*vcsURL, "/"), owner, repoName, prNumber, posted.ID)
-		ext, hasExt := vcsClientImpl.(giteaExtendedClient)
 		for _, oldReview := range oldReviews {
-			if !hasExt {
-				slog.Debug("VCS client does not support review supersede; skipping", "review_id", oldReview.ID)
-				continue
-			}
-			cid, err := ext.GetTimelineReviewCommentIDForReview(ctx, owner, repoName, prNumber, oldReview.ID)
+			cid, err := giteaClient.GetTimelineReviewCommentIDForReview(ctx, owner, repoName, prNumber, oldReview.ID)
 			if err != nil {
 				slog.Warn("could not find comment ID for old review", "review_id", oldReview.ID, "error", err)
 				continue
 			}
 			supersededBody := buildSupersededBody(oldReview.Body, oldReview.CommitID, newReviewURL, sentinel)
-			if err := ext.EditComment(ctx, owner, repoName, cid, supersededBody); err != nil {
+			if err := giteaClient.EditComment(ctx, owner, repoName, cid, supersededBody); err != nil {
 				slog.Warn("could not mark old review as superseded", "review_id", oldReview.ID, "comment_id", cid, "error", err)
 				continue
 			}
 			slog.Info("marked old review as superseded", "review_id", oldReview.ID, "new_review_id", posted.ID, "pr", prNumber)

 			// Resolve old review's inline comments
-			oldComments, err := ext.ListReviewComments(ctx, owner, repoName, prNumber, oldReview.ID)
+			oldComments, err := giteaClient.ListReviewComments(ctx, owner, repoName, prNumber, oldReview.ID)
 			if err != nil {
 				slog.Warn("could not list old review comments for resolution", "review_id", oldReview.ID, "error", err)
 				continue
@@ -536,7 +512,7 @@ func main() {
 				if c.ID == 0 {
 					continue
 				}
-				if err := ext.ResolveComment(ctx, owner, repoName, c.ID); err != nil {
+				if err := giteaClient.ResolveComment(ctx, owner, repoName, c.ID); err != nil {
 					slog.Debug("could not resolve inline comment", "comment_id", c.ID, "error", err)
 					failed++
 				} else {
@@ -555,7 +531,7 @@ func main() {
 }

 // fetchFileContext fetches the full content of modified files from the PR branch.
-func fetchFileContext(ctx context.Context, client vcsClient, owner, repo, ref string, files []changedFileInfo) string {
+func fetchFileContext(ctx context.Context, client vcsClient, owner, repo, ref string, files []gitea.ChangedFile) string {
 	var sb strings.Builder
 	for _, f := range files {
 		if ctx.Err() != nil {
@@ -619,13 +595,8 @@ func fetchPatterns(ctx context.Context, client vcsClient, patternsRepo, patterns
 		var repoLoadedFiles []string
 		var repoSkippedFiles []string

-		giteaRaw, isGitea := client.(*giteaClientVCSAdapter)
-		if !isGitea {
-			slog.Warn("patterns fetching is only supported with the Gitea VCS client; skipping", "repo", repoRef)
-			continue
-		}
 		for _, path := range paths {
-			files, err := giteaRaw.client.GetAllFilesInPath(ctx, owner, repo, path)
+			files, err := client.GetAllFilesInPath(ctx, owner, repo, path)
 			if err != nil {
 				slog.Warn("could not fetch patterns", "path", path, "repo", repoRef, "error", err)
 				continue
@@ -664,7 +635,7 @@ func isPatternFile(path string) bool {
 }

 // evaluateCIStatus checks if all CI statuses indicate success.
-func evaluateCIStatus(statuses []commitStatusInfo) (passed bool, details string) {
+func evaluateCIStatus(statuses []gitea.CommitStatus) (passed bool, details string) {
 	if len(statuses) == 0 {
 		return true, "no CI statuses found"
 	}
@@ -802,7 +773,7 @@ func buildSupersededBody(originalBody, commitSHA, newReviewURL, sentinel string)
 // Gitea user. This indicates misconfiguration where two roles share a token
 // instead of having separate Gitea accounts. Returns true if shared token
 // detected (caller should skip update-in-place logic to avoid clobbering).
-func hasSharedToken(reviews []reviewInfo, ownSentinel string) bool {
+func hasSharedToken(reviews []gitea.Review, ownSentinel string) bool {
 	ownLogin := ""
 	for _, r := range reviews {
 		if strings.Contains(r.Body, ownSentinel) {
@@ -840,8 +811,8 @@ func extractSentinelName(body string) string {
 }

 // findOwnReview locates the most recent non-superseded review matching the sentinel.
-func findOwnReview(reviews []reviewInfo, sentinel string) *reviewInfo {
-	var best *reviewInfo
+func findOwnReview(reviews []gitea.Review, sentinel string) *gitea.Review {
+	var best *gitea.Review
 	for i := range reviews {
 		if !strings.Contains(reviews[i].Body, sentinel) {
 			continue
@@ -857,8 +828,8 @@ func findOwnReview(reviews []reviewInfo, sentinel string) *reviewInfo {
 }

 // findAllOwnReviews returns all non-superseded reviews matching the sentinel.
-func findAllOwnReviews(reviews []reviewInfo, sentinel string) []reviewInfo {
-	var result []reviewInfo
+func findAllOwnReviews(reviews []gitea.Review, sentinel string) []gitea.Review {
+	var result []gitea.Review
 	for i := range reviews {
 		if !strings.Contains(reviews[i].Body, sentinel) {
 			continue
@@ -871,22 +842,6 @@ func findAllOwnReviews(reviews []reviewInfo, sentinel string) []reviewInfo {
 	return result
 }

-// verdictToVCSEvent converts a review verdict string to a vcs.ReviewEvent.
-// The verdict comes from the LLM result and uses values: "APPROVE", "REQUEST_CHANGES",
-// or any other string (treated as COMMENT).
-// vcs.ReviewEvent constants follow GitHub API format ("APPROVE", "REQUEST_CHANGES", "COMMENT").
-// The Gitea adapter translates these back to Gitea format ("APPROVED", etc.) before posting.
-func verdictToVCSEvent(verdict string) vcs.ReviewEvent {
-	switch verdict {
-	case "APPROVE":
-		return vcs.ReviewEventApprove
-	case "REQUEST_CHANGES":
-		return vcs.ReviewEventRequestChanges
-	default:
-		return vcs.ReviewEventComment
-	}
-}
-
 // shouldSkipStaleReview reports whether to skip posting because HEAD moved.
 // Returns true (skip) if evaluatedSHA differs from currentSHA.
 // Returns false (don't skip) if:
@@ -900,32 +855,3 @@ func shouldSkipStaleReview(evaluatedSHA, currentSHA string) bool {
 	return evaluatedSHA != currentSHA
 }

-// reviewClientAdapter adapts a vcsClient to review.GiteaClient for persona loading.
-// The review package only needs ListContents and GetFileContent, which all vcsClients provide.
-type reviewClientAdapter struct {
-	client vcsClient
-}
-
-func newReviewClientAdapter(c vcsClient) *reviewClientAdapter {
-	return &reviewClientAdapter{client: c}
-}
-
-func (a *reviewClientAdapter) ListContents(ctx context.Context, owner, repo, path string) ([]review.ContentEntry, error) {
-	entries, err := a.client.ListContents(ctx, owner, repo, path)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]review.ContentEntry, len(entries))
-	for i, e := range entries {
-		result[i] = review.ContentEntry{
-			Name: e.Name,
-			Path: e.Path,
-			Type: e.Type,
-		}
-	}
-	return result, nil
-}
-
-func (a *reviewClientAdapter) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
-	return a.client.GetFileContent(ctx, owner, repo, filepath)
-}
@@ -10,7 +10,7 @@ import (
 	"strings"
 	"testing"

-	"gitea.weiker.me/rodin/review-bot/vcs"
+	"gitea.weiker.me/rodin/review-bot/gitea"
 )

 func TestValidateReviewerName(t *testing.T) {
@@ -154,14 +154,14 @@ func TestValidateWorkspacePath(t *testing.T) {
 	}
 }

-func makeReview(id int64, login, state string, stale bool, body string) reviewInfo {
-	r := reviewInfo{
+func makeReview(id int64, login, state string, stale bool, body string) gitea.Review {
+	r := gitea.Review{
 		ID:    id,
 		Body:  body,
 		State: state,
 		Stale: stale,
 	}
-	r.User = vcs.UserInfo{Login: login}
+	r.User.Login = login
 	return r
 }

@@ -216,7 +216,7 @@ func TestBuildSupersededBodyShortSHA(t *testing.T) {
 func TestFindOwnReview(t *testing.T) {
 	tests := []struct {
 		name     string
-		reviews  []reviewInfo
+		reviews  []gitea.Review
 		sentinel string
 		wantID   int64
 		wantNil  bool
@@ -229,7 +229,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "found by sentinel",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(42, "bot", "APPROVED", false, "review body\n<!-- review-bot:sonnet -->"),
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
@@ -237,7 +237,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "wrong sentinel",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(42, "bot", "APPROVED", false, "body\n<!-- review-bot:gpt -->"),
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
@@ -245,7 +245,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "multiple reviews, returns first match",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(10, "bot", "APPROVED", false, "old\n<!-- review-bot:gpt -->"),
 				makeReview(20, "bot", "APPROVED", false, "new\n<!-- review-bot:sonnet -->"),
 			},
@@ -254,7 +254,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "skips superseded review",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(10, "bot", "APPROVED", false, "~~Original review~~\n\n**Superseded**\n<!-- review-bot:sonnet -->"),
 				makeReview(20, "bot", "APPROVED", false, "fresh review\n<!-- review-bot:sonnet -->"),
 			},
@@ -263,7 +263,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "only superseded reviews exist",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(10, "bot", "APPROVED", false, "~~Original review~~\n\n<!-- review-bot:sonnet -->"),
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
@@ -271,7 +271,7 @@ func TestFindOwnReview(t *testing.T) {
 		},
 		{
 			name: "picks highest ID among matches",
-			reviews: []reviewInfo{
+			reviews: []gitea.Review{
 				makeReview(50, "bot", "APPROVED", false, "v1\n<!-- review-bot:sonnet -->"),
 				makeReview(30, "bot", "APPROVED", false, "v0\n<!-- review-bot:sonnet -->"),
 			},
@@ -302,7 +302,7 @@ func TestFindOwnReview(t *testing.T) {
 func TestHasSharedToken(t *testing.T) {
 	tests := []struct {
 		name     string
-		reviews  []reviewInfo
+		reviews  []gitea.Review
 		sentinel string
 		want     bool
 	}{
@@ -314,36 +314,36 @@ func TestHasSharedToken(t *testing.T) {
 		},
 		{
 			name: "no own review yet - cannot detect",
-			reviews: []reviewInfo{
-				{ID: 1, User: vcs.UserInfo{Login: "other"}, Body: "<!-- review-bot:gpt --> body"},
+			reviews: []gitea.Review{
+				{ID: 1, User: struct{ Login string `json:"login"` }{Login: "other"}, Body: "<!-- review-bot:gpt --> body"},
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
 			want:     false,
 		},
 		{
 			name: "separate users - no shared token",
-			reviews: []reviewInfo{
-				{ID: 1, User: vcs.UserInfo{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:sonnet --> body"},
-				{ID: 2, User: vcs.UserInfo{Login: "security-review-bot"}, Body: "<!-- review-bot:security --> body"},
+			reviews: []gitea.Review{
+				{ID: 1, User: struct{ Login string `json:"login"` }{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:sonnet --> body"},
+				{ID: 2, User: struct{ Login string `json:"login"` }{Login: "security-review-bot"}, Body: "<!-- review-bot:security --> body"},
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
 			want:     false,
 		},
 		{
 			name: "shared token detected - same user different sentinels",
-			reviews: []reviewInfo{
-				{ID: 1, User: vcs.UserInfo{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:sonnet --> body"},
-				{ID: 2, User: vcs.UserInfo{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:security --> body"},
+			reviews: []gitea.Review{
+				{ID: 1, User: struct{ Login string `json:"login"` }{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:sonnet --> body"},
+				{ID: 2, User: struct{ Login string `json:"login"` }{Login: "sonnet-review-bot"}, Body: "<!-- review-bot:security --> body"},
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
 			want:     true,
 		},
 		{
 			name: "three roles same user",
-			reviews: []reviewInfo{
-				{ID: 1, User: vcs.UserInfo{Login: "bot"}, Body: "<!-- review-bot:sonnet --> body"},
-				{ID: 2, User: vcs.UserInfo{Login: "bot"}, Body: "<!-- review-bot:security --> body"},
-				{ID: 3, User: vcs.UserInfo{Login: "bot"}, Body: "<!-- review-bot:gpt --> body"},
+			reviews: []gitea.Review{
+				{ID: 1, User: struct{ Login string `json:"login"` }{Login: "bot"}, Body: "<!-- review-bot:sonnet --> body"},
+				{ID: 2, User: struct{ Login string `json:"login"` }{Login: "bot"}, Body: "<!-- review-bot:security --> body"},
+				{ID: 3, User: struct{ Login string `json:"login"` }{Login: "bot"}, Body: "<!-- review-bot:gpt --> body"},
 			},
 			sentinel: "<!-- review-bot:sonnet -->",
 			want:     true,
@@ -553,7 +553,7 @@ func TestBuildPatternPaths(t *testing.T) {
 func TestEvaluateCIStatus(t *testing.T) {
 	tests := []struct {
 		name       string
-		statuses   []commitStatusInfo
+		statuses   []gitea.CommitStatus
 		wantPassed bool
 		wantSubstr string
 	}{
@@ -565,7 +565,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "all success",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "success", Context: "ci/build", Description: "Build passed"},
 				{Status: "success", Context: "ci/test", Description: "Tests passed"},
 			},
@@ -574,7 +574,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "one failure",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "success", Context: "ci/build", Description: "Build passed"},
 				{Status: "failure", Context: "ci/test", Description: "Tests failed"},
 			},
@@ -583,7 +583,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "error status",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "error", Context: "ci/lint", Description: "Lint error"},
 			},
 			wantPassed: false,
@@ -591,7 +591,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "pending treated as not-failed",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "pending", Context: "ci/build", Description: "In progress"},
 				{Status: "success", Context: "ci/test", Description: "Tests passed"},
 			},
@@ -600,7 +600,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "multiple failures",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "failure", Context: "ci/build", Description: "Build failed"},
 				{Status: "failure", Context: "ci/test", Description: "Tests failed"},
 			},
@@ -609,7 +609,7 @@ func TestEvaluateCIStatus(t *testing.T) {
 		},
 		{
 			name: "mixed with pending and failure",
-			statuses: []commitStatusInfo{
+			statuses: []gitea.CommitStatus{
 				{Status: "success", Context: "ci/build", Description: "Build passed"},
 				{Status: "pending", Context: "ci/deploy", Description: "Deploying"},
 				{Status: "failure", Context: "ci/test", Description: "Tests failed"},
@@ -997,7 +997,7 @@ func cleanEnv() []string {
 }

 func TestFindAllOwnReviews(t *testing.T) {
-	reviews := []reviewInfo{
+	reviews := []gitea.Review{
 		{ID: 1, Body: "<!-- review-bot:sonnet -->\nfirst review"},
 		{ID: 2, Body: "<!-- review-bot:gpt -->\nother bot"},
 		{ID: 3, Body: "<!-- review-bot:sonnet -->\nsecond review"},
@@ -0,0 +1,295 @@
+package main
+
+// vcs.go — VCS client abstraction for supporting both Gitea and GitHub.
+//
+// This file defines the vcsClient interface that main.go uses for all VCS
+// operations, and provides a githubAdapter that wraps *github.Client and
+// converts between github-package types and the gitea-package types used
+// throughout the rest of the binary.
+//
+// Design rationale: the entire codebase was written against gitea types.
+// Rather than introduce a third "shared" type package and update every call
+// site, the adapter converts at the boundary. The conversion is cheap — these
+// are small structs fetched once per run.
+
+import (
+	"context"
+	"os"
+
+	githubpkg "gitea.weiker.me/rodin/review-bot/github"
+	"gitea.weiker.me/rodin/review-bot/gitea"
+	"gitea.weiker.me/rodin/review-bot/review"
+)
+
+// vcsClient is the interface that main.go uses for all VCS API operations.
+// Both *gitea.Client (directly) and *githubAdapter (via this file) satisfy it.
+type vcsClient interface {
+	GetPullRequest(ctx context.Context, owner, repo string, number int) (*gitea.PullRequest, error)
+	GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error)
+	GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]gitea.ChangedFile, error)
+	GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]gitea.CommitStatus, error)
+	GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error)
+	GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error)
+	GetAllFilesInPath(ctx context.Context, owner, repo, path string) (map[string]string, error)
+	ListReviews(ctx context.Context, owner, repo string, number int) ([]gitea.Review, error)
+	GetAuthenticatedUser(ctx context.Context) (string, error)
+	RequestReviewer(ctx context.Context, owner, repo string, number int, reviewer string) error
+	PostReview(ctx context.Context, owner, repo string, number int, event, body, commitID string, comments []gitea.ReviewComment) (*gitea.Review, error)
+	GetTimelineReviewCommentIDForReview(ctx context.Context, owner, repo string, number int, reviewID int64) (int64, error)
+	EditComment(ctx context.Context, owner, repo string, commentID int64, newBody string) error
+	ListReviewComments(ctx context.Context, owner, repo string, prNumber int, reviewID int64) ([]gitea.ReviewComment, error)
+	ResolveComment(ctx context.Context, owner, repo string, commentID int64) error
+	ListContents(ctx context.Context, owner, repo, path string) ([]gitea.ContentEntry, error)
+}
+
+// vcsClientAdapterForPersona adapts vcsClient to review.GiteaClient.
+// Used by LoadRepoPersonas which needs only ListContents + GetFileContent.
+type vcsClientAdapterForPersona struct {
+	client vcsClient
+}
+
+func newVCSClientAdapterForPersona(c vcsClient) *vcsClientAdapterForPersona {
+	return &vcsClientAdapterForPersona{client: c}
+}
+
+func (a *vcsClientAdapterForPersona) ListContents(ctx context.Context, owner, repo, path string) ([]review.ContentEntry, error) {
+	entries, err := a.client.ListContents(ctx, owner, repo, path)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]review.ContentEntry, len(entries))
+	for i, e := range entries {
+		result[i] = review.ContentEntry{
+			Name: e.Name,
+			Path: e.Path,
+			Type: e.Type,
+		}
+	}
+	return result, nil
+}
+
+func (a *vcsClientAdapterForPersona) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
+	return a.client.GetFileContent(ctx, owner, repo, filepath)
+}
+
+// detectVCSType returns "github" if the environment indicates a GitHub or GHES
+// runner, "gitea" otherwise.
+//
+// Detection logic mirrors the action.yml composite action:
+//   - GITHUB_API_URL is set by GitHub Actions runners (github.com and GHES)
+//   - On Gitea Actions runners it is empty or absent
+func detectVCSType() string {
+	if os.Getenv("GITHUB_API_URL") != "" {
+		return "github"
+	}
+	return "gitea"
+}
+
+// githubAPIBaseURL returns the GitHub API base URL from the environment.
+// On GitHub.com this is https://api.github.com.
+// On GHES this is https://<host>/api/v3.
+func githubAPIBaseURL() string {
+	if u := os.Getenv("GITHUB_API_URL"); u != "" {
+		return u
+	}
+	return "https://api.github.com"
+}
+
+// githubAdapter wraps *github.Client and translates github-package types to
+// gitea-package types so that the rest of main.go can remain unchanged.
+type githubAdapter struct {
+	c *githubpkg.Client
+}
+
+func newGitHubAdapter(token, apiBaseURL string) *githubAdapter {
+	return &githubAdapter{c: githubpkg.NewClient(token, apiBaseURL)}
+}
+
+func (a *githubAdapter) GetPullRequest(ctx context.Context, owner, repo string, number int) (*gitea.PullRequest, error) {
+	pr, err := a.c.GetPullRequest(ctx, owner, repo, number)
+	if err != nil {
+		return nil, err
+	}
+	return &gitea.PullRequest{
+		Title: pr.Title,
+		Body:  pr.Body,
+		Head: struct {
+			Sha string "json:\"sha\""
+			Ref string "json:\"ref\""
+		}{Sha: pr.Head.Sha, Ref: pr.Head.Ref},
+	}, nil
+}
+
+func (a *githubAdapter) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
+	return a.c.GetPullRequestDiff(ctx, owner, repo, number)
+}
+
+func (a *githubAdapter) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]gitea.ChangedFile, error) {
+	files, err := a.c.GetPullRequestFiles(ctx, owner, repo, number)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]gitea.ChangedFile, len(files))
+	for i, f := range files {
+		result[i] = gitea.ChangedFile{
+			Filename: f.Filename,
+			Status:   f.Status,
+		}
+	}
+	return result, nil
+}
+
+func (a *githubAdapter) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]gitea.CommitStatus, error) {
+	statuses, err := a.c.GetCommitStatuses(ctx, owner, repo, sha)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]gitea.CommitStatus, len(statuses))
+	for i, s := range statuses {
+		// GitHub uses "state" with values: success, failure, pending, error.
+		// Gitea uses "status" with values: success, failure, pending, warning, error.
+		// Map GitHub's "state" to gitea's "status" field for evaluateCIStatus().
+		result[i] = gitea.CommitStatus{
+			Status:      s.State,
+			Context:     s.Context,
+			Description: s.Description,
+			TargetURL:   s.TargetURL,
+		}
+	}
+	return result, nil
+}
+
+func (a *githubAdapter) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
+	return a.c.GetFileContent(ctx, owner, repo, filepath)
+}
+
+func (a *githubAdapter) GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error) {
+	return a.c.GetFileContentRef(ctx, owner, repo, filepath, ref)
+}
+
+func (a *githubAdapter) GetAllFilesInPath(ctx context.Context, owner, repo, path string) (map[string]string, error) {
+	return a.c.GetAllFilesInPath(ctx, owner, repo, path)
+}
+
+func (a *githubAdapter) ListReviews(ctx context.Context, owner, repo string, number int) ([]gitea.Review, error) {
+	reviews, err := a.c.ListReviews(ctx, owner, repo, number)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]gitea.Review, len(reviews))
+	for i, r := range reviews {
+		result[i] = gitea.Review{
+			ID:   r.ID,
+			Body: r.Body,
+			User: struct {
+				Login string "json:\"login\""
+			}{Login: r.User.Login},
+			State:    r.State,
+			CommitID: r.CommitID,
+		}
+	}
+	return result, nil
+}
+
+func (a *githubAdapter) GetAuthenticatedUser(ctx context.Context) (string, error) {
+	return a.c.GetAuthenticatedUser(ctx)
+}
+
+func (a *githubAdapter) RequestReviewer(ctx context.Context, owner, repo string, number int, reviewer string) error {
+	return a.c.RequestReviewer(ctx, owner, repo, number, reviewer)
+}
+
+func (a *githubAdapter) PostReview(ctx context.Context, owner, repo string, number int, event, body, commitID string, comments []gitea.ReviewComment) (*gitea.Review, error) {
+	// Convert gitea ReviewComments to github ReviewComments.
+	// NewPosition in Gitea maps to Position in GitHub (diff line position).
+	ghComments := make([]githubpkg.ReviewComment, len(comments))
+	for i, c := range comments {
+		ghComments[i] = githubpkg.ReviewComment{
+			Path:     c.Path,
+			Position: c.NewPosition,
+			Body:     c.Body,
+		}
+	}
+	review, err := a.c.PostReview(ctx, owner, repo, number, event, body, commitID, ghComments)
+	if err != nil {
+		return nil, err
+	}
+	return &gitea.Review{
+		ID:   review.ID,
+		Body: review.Body,
+		User: struct {
+			Login string "json:\"login\""
+		}{Login: review.User.Login},
+		State:    review.State,
+		CommitID: review.CommitID,
+	}, nil
+}
+
+func (a *githubAdapter) GetTimelineReviewCommentIDForReview(ctx context.Context, owner, repo string, number int, reviewID int64) (int64, error) {
+	return a.c.GetTimelineReviewCommentIDForReview(ctx, owner, repo, number, reviewID)
+}
+
+func (a *githubAdapter) EditComment(ctx context.Context, owner, repo string, commentID int64, newBody string) error {
+	return a.c.EditComment(ctx, owner, repo, commentID, newBody)
+}
+
+func (a *githubAdapter) ListReviewComments(ctx context.Context, owner, repo string, prNumber int, reviewID int64) ([]gitea.ReviewComment, error) {
+	comments, err := a.c.ListReviewComments(ctx, owner, repo, prNumber, reviewID)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]gitea.ReviewComment, len(comments))
+	for i, c := range comments {
+		result[i] = gitea.ReviewComment{
+			ID:          c.ID,
+			Path:        c.Path,
+			NewPosition: c.Position,
+			Body:        c.Body,
+		}
+	}
+	return result, nil
+}
+
+func (a *githubAdapter) ResolveComment(ctx context.Context, owner, repo string, commentID int64) error {
+	return a.c.ResolveComment(ctx, owner, repo, commentID)
+}
+
+func (a *githubAdapter) ListContents(ctx context.Context, owner, repo, path string) ([]gitea.ContentEntry, error) {
+	entries, err := a.c.ListContents(ctx, owner, repo, path)
+	if err != nil {
+		return nil, err
+	}
+	result := make([]gitea.ContentEntry, len(entries))
+	for i, e := range entries {
+		result[i] = gitea.ContentEntry{
+			Name: e.Name,
+			Path: e.Path,
+			Type: e.Type,
+		}
+	}
+	return result, nil
+}
+
+// newVCSClient creates the appropriate VCS client based on detected VCS type.
+// On GitHub/GHES (GITHUB_API_URL set), returns a githubAdapter.
+// On Gitea (GITHUB_API_URL absent), returns *gitea.Client directly.
+//
+// For GitHub: uses GITHUB_API_URL as the API base URL (trusted platform value).
+// For Gitea: uses vcsURL (validated before this call).
+func newVCSClient(vcsType, vcsURL, reviewerToken string) vcsClient {
+	switch vcsType {
+	case "github":
+		apiURL := githubAPIBaseURL()
+		return newGitHubAdapter(reviewerToken, apiURL)
+	default:
+		return gitea.NewClient(vcsURL, reviewerToken)
+	}
+}
+
+// buildRepoPersonaClient creates a review.GiteaClient from the active vcsClient.
+// This exists because LoadRepoPersonas expects the review.GiteaClient interface
+// (which only requires ListContents + GetFileContent).
+func buildRepoPersonaClient(c vcsClient) review.GiteaClient {
+	return newVCSClientAdapterForPersona(c)
+}
+
@@ -1,405 +0,0 @@
-package main
-
-import (
-	"context"
-
-	"gitea.weiker.me/rodin/review-bot/gitea"
-	"gitea.weiker.me/rodin/review-bot/github"
-	"gitea.weiker.me/rodin/review-bot/vcs"
-)
-
-// vcsClient is the unified interface for VCS operations used by the review flow.
-// Both gitea.Client and github.Client satisfy this interface via their respective adapters.
-type vcsClient interface {
-	// GetPullRequest fetches PR metadata.
-	GetPullRequest(ctx context.Context, owner, repo string, number int) (*pullRequestInfo, error)
-
-	// GetPullRequestDiff fetches the unified diff.
-	GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error)
-
-	// GetPullRequestFiles fetches the list of changed files.
-	GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]changedFileInfo, error)
-
-	// GetCommitStatuses fetches CI statuses for a commit.
-	GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]commitStatusInfo, error)
-
-	// GetFileContent fetches the content of a file at HEAD.
-	GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error)
-
-	// GetFileContentRef fetches the content of a file at a given ref.
-	GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error)
-
-	// ListContents lists the files and directories at a path.
-	ListContents(ctx context.Context, owner, repo, path string) ([]contentEntryInfo, error)
-
-	// ListReviews returns all reviews for a PR.
-	ListReviews(ctx context.Context, owner, repo string, number int) ([]reviewInfo, error)
-
-	// PostReview submits a review.
-	PostReview(ctx context.Context, owner, repo string, number int, req vcs.ReviewRequest) (*reviewInfo, error)
-
-	// GetAuthenticatedUser returns the login of the authenticated user.
-	GetAuthenticatedUser(ctx context.Context) (string, error)
-}
-
-// giteaExtendedClient is implemented by the Gitea adapter and exposes
-// Gitea-specific operations that have no GitHub equivalent in the current scope.
-// Callers should type-assert to this interface and skip gracefully when it is absent.
-type giteaExtendedClient interface {
-	// RequestReviewer adds the authenticated user as a reviewer on a PR.
-	RequestReviewer(ctx context.Context, owner, repo string, number int, user string) error
-
-	// GetTimelineReviewCommentIDForReview maps a review ID to its timeline comment ID.
-	GetTimelineReviewCommentIDForReview(ctx context.Context, owner, repo string, number int, reviewID int64) (int64, error)
-
-	// EditComment updates the body of an existing PR comment.
-	EditComment(ctx context.Context, owner, repo string, commentID int64, body string) error
-
-	// ListReviewComments lists the inline comments attached to a review.
-	ListReviewComments(ctx context.Context, owner, repo string, number int, reviewID int64) ([]inlineCommentInfo, error)
-
-	// ResolveComment marks an inline comment as resolved.
-	ResolveComment(ctx context.Context, owner, repo string, commentID int64) error
-
-	// ParseDiffNewLines returns the diff line ranges for inline comment positioning.
-	ParseDiffNewLines(diff string) diffLineRanges
-}
-
-// Shared adapter types to avoid duplicating gitea/github-specific types throughout main.go.
-
-type pullRequestInfo struct {
-	Title   string
-	Body    string
-	HeadSha string
-	HeadRef string
-}
-
-type changedFileInfo struct {
-	Filename string
-	Status   string
-}
-
-type commitStatusInfo struct {
-	Status      string
-	Context     string
-	Description string
-	TargetURL   string
-}
-
-type contentEntryInfo struct {
-	Name string
-	Path string
-	Type string
-}
-
-type reviewInfo struct {
-	ID       int64
-	Body     string
-	User     vcs.UserInfo
-	State    string
-	CommitID string
-	Stale    bool
-}
-
-type inlineCommentInfo struct {
-	ID          int64
-	Path        string
-	NewPosition int64
-	Body        string
-}
-
-// diffLineRanges is a type alias for gitea.DiffLineRanges to allow the
-// extended client interface to be defined without importing gitea directly.
-// In practice, only the giteaClientVCSAdapter returns this type, and callers
-// that use it will already have performed the type assertion.
-type diffLineRanges = *gitea.DiffLineRanges
-
-// --- Gitea adapter ---
-
-// giteaClientVCSAdapter wraps gitea.Client to satisfy the vcsClient interface.
-// It also implements giteaExtendedClient for Gitea-specific operations.
-type giteaClientVCSAdapter struct {
-	client *gitea.Client
-}
-
-func newGiteaVCSAdapter(c *gitea.Client) *giteaClientVCSAdapter {
-	return &giteaClientVCSAdapter{client: c}
-}
-
-func (a *giteaClientVCSAdapter) GetPullRequest(ctx context.Context, owner, repo string, number int) (*pullRequestInfo, error) {
-	pr, err := a.client.GetPullRequest(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	return &pullRequestInfo{
-		Title:   pr.Title,
-		Body:    pr.Body,
-		HeadSha: pr.Head.Sha,
-		HeadRef: pr.Head.Ref,
-	}, nil
-}
-
-func (a *giteaClientVCSAdapter) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
-	return a.client.GetPullRequestDiff(ctx, owner, repo, number)
-}
-
-func (a *giteaClientVCSAdapter) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]changedFileInfo, error) {
-	files, err := a.client.GetPullRequestFiles(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]changedFileInfo, len(files))
-	for i, f := range files {
-		result[i] = changedFileInfo{Filename: f.Filename, Status: f.Status}
-	}
-	return result, nil
-}
-
-func (a *giteaClientVCSAdapter) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]commitStatusInfo, error) {
-	statuses, err := a.client.GetCommitStatuses(ctx, owner, repo, sha)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]commitStatusInfo, len(statuses))
-	for i, s := range statuses {
-		result[i] = commitStatusInfo{
-			Status:      s.Status,
-			Context:     s.Context,
-			Description: s.Description,
-			TargetURL:   s.TargetURL,
-		}
-	}
-	return result, nil
-}
-
-func (a *giteaClientVCSAdapter) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
-	return a.client.GetFileContent(ctx, owner, repo, filepath)
-}
-
-func (a *giteaClientVCSAdapter) GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error) {
-	return a.client.GetFileContentRef(ctx, owner, repo, filepath, ref)
-}
-
-func (a *giteaClientVCSAdapter) ListContents(ctx context.Context, owner, repo, path string) ([]contentEntryInfo, error) {
-	entries, err := a.client.ListContents(ctx, owner, repo, path)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]contentEntryInfo, len(entries))
-	for i, e := range entries {
-		result[i] = contentEntryInfo{Name: e.Name, Path: e.Path, Type: e.Type}
-	}
-	return result, nil
-}
-
-func (a *giteaClientVCSAdapter) ListReviews(ctx context.Context, owner, repo string, number int) ([]reviewInfo, error) {
-	reviews, err := a.client.ListReviews(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]reviewInfo, len(reviews))
-	for i, r := range reviews {
-		result[i] = reviewInfo{
-			ID:       r.ID,
-			Body:     r.Body,
-			User:     vcs.UserInfo{Login: r.User.Login},
-			State:    r.State,
-			CommitID: r.CommitID,
-			Stale:    r.Stale,
-		}
-	}
-	return result, nil
-}
-
-func (a *giteaClientVCSAdapter) PostReview(ctx context.Context, owner, repo string, number int, req vcs.ReviewRequest) (*reviewInfo, error) {
-	// Translate vcs.ReviewComment to gitea.ReviewComment.
-	// The Gitea API uses NewPosition instead of Position.
-	var comments []gitea.ReviewComment
-	for _, c := range req.Comments {
-		comments = append(comments, gitea.ReviewComment{
-			Path:        c.Path,
-			NewPosition: int64(c.Position),
-			Body:        c.Body,
-		})
-	}
-
-	// Translate vcs.ReviewEvent (GitHub format) to Gitea API event string.
-	// vcs uses "APPROVE"; Gitea API expects "APPROVED".
-	var event string
-	switch req.Event {
-	case vcs.ReviewEventApprove:
-		event = "APPROVED"
-	case vcs.ReviewEventRequestChanges:
-		event = "REQUEST_CHANGES"
-	default:
-		event = "COMMENT"
-	}
-
-	posted, err := a.client.PostReview(ctx, owner, repo, number, event, req.Body, req.CommitID, comments)
-	if err != nil {
-		return nil, err
-	}
-	return &reviewInfo{
-		ID:       posted.ID,
-		Body:     posted.Body,
-		User:     vcs.UserInfo{Login: posted.User.Login},
-		State:    posted.State,
-		CommitID: posted.CommitID,
-	}, nil
-}
-
-func (a *giteaClientVCSAdapter) GetAuthenticatedUser(ctx context.Context) (string, error) {
-	return a.client.GetAuthenticatedUser(ctx)
-}
-
-// giteaExtendedClient implementation:
-
-func (a *giteaClientVCSAdapter) RequestReviewer(ctx context.Context, owner, repo string, number int, user string) error {
-	return a.client.RequestReviewer(ctx, owner, repo, number, user)
-}
-
-func (a *giteaClientVCSAdapter) GetTimelineReviewCommentIDForReview(ctx context.Context, owner, repo string, number int, reviewID int64) (int64, error) {
-	return a.client.GetTimelineReviewCommentIDForReview(ctx, owner, repo, number, reviewID)
-}
-
-func (a *giteaClientVCSAdapter) EditComment(ctx context.Context, owner, repo string, commentID int64, body string) error {
-	return a.client.EditComment(ctx, owner, repo, commentID, body)
-}
-
-func (a *giteaClientVCSAdapter) ListReviewComments(ctx context.Context, owner, repo string, number int, reviewID int64) ([]inlineCommentInfo, error) {
-	comments, err := a.client.ListReviewComments(ctx, owner, repo, number, reviewID)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]inlineCommentInfo, len(comments))
-	for i, c := range comments {
-		result[i] = inlineCommentInfo{
-			ID:          c.ID,
-			Path:        c.Path,
-			NewPosition: c.NewPosition,
-			Body:        c.Body,
-		}
-	}
-	return result, nil
-}
-
-func (a *giteaClientVCSAdapter) ResolveComment(ctx context.Context, owner, repo string, commentID int64) error {
-	return a.client.ResolveComment(ctx, owner, repo, commentID)
-}
-
-func (a *giteaClientVCSAdapter) ParseDiffNewLines(diff string) diffLineRanges {
-	return gitea.ParseDiffNewLines(diff)
-}
-
-// --- GitHub adapter ---
-
-// githubClientVCSAdapter wraps github.Client to satisfy the vcsClient interface.
-type githubClientVCSAdapter struct {
-	client *github.Client
-}
-
-func newGitHubVCSAdapter(c *github.Client) *githubClientVCSAdapter {
-	return &githubClientVCSAdapter{client: c}
-}
-
-func (a *githubClientVCSAdapter) GetPullRequest(ctx context.Context, owner, repo string, number int) (*pullRequestInfo, error) {
-	pr, err := a.client.GetPullRequest(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	return &pullRequestInfo{
-		Title:   pr.Title,
-		Body:    pr.Body,
-		HeadSha: pr.Head.Sha,
-		HeadRef: pr.Head.Ref,
-	}, nil
-}
-
-func (a *githubClientVCSAdapter) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
-	return a.client.GetPullRequestDiff(ctx, owner, repo, number)
-}
-
-func (a *githubClientVCSAdapter) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]changedFileInfo, error) {
-	files, err := a.client.GetPullRequestFiles(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]changedFileInfo, len(files))
-	for i, f := range files {
-		result[i] = changedFileInfo{Filename: f.Filename, Status: f.Status}
-	}
-	return result, nil
-}
-
-func (a *githubClientVCSAdapter) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]commitStatusInfo, error) {
-	statuses, err := a.client.GetCommitStatuses(ctx, owner, repo, sha)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]commitStatusInfo, len(statuses))
-	for i, s := range statuses {
-		result[i] = commitStatusInfo{
-			Status:      s.Status,
-			Context:     s.Context,
-			Description: s.Description,
-			TargetURL:   s.TargetURL,
-		}
-	}
-	return result, nil
-}
-
-func (a *githubClientVCSAdapter) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
-	return a.client.GetFileContent(ctx, owner, repo, filepath)
-}
-
-func (a *githubClientVCSAdapter) GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error) {
-	return a.client.GetFileContentRef(ctx, owner, repo, filepath, ref)
-}
-
-func (a *githubClientVCSAdapter) ListContents(ctx context.Context, owner, repo, path string) ([]contentEntryInfo, error) {
-	entries, err := a.client.ListContents(ctx, owner, repo, path)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]contentEntryInfo, len(entries))
-	for i, e := range entries {
-		result[i] = contentEntryInfo{Name: e.Name, Path: e.Path, Type: e.Type}
-	}
-	return result, nil
-}
-
-func (a *githubClientVCSAdapter) ListReviews(ctx context.Context, owner, repo string, number int) ([]reviewInfo, error) {
-	reviews, err := a.client.ListReviews(ctx, owner, repo, number)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]reviewInfo, len(reviews))
-	for i, r := range reviews {
-		result[i] = reviewInfo{
-			ID:       r.ID,
-			Body:     r.Body,
-			User:     r.User,
-			State:    r.State,
-			CommitID: r.CommitID,
-		}
-	}
-	return result, nil
-}
-
-func (a *githubClientVCSAdapter) PostReview(ctx context.Context, owner, repo string, number int, req vcs.ReviewRequest) (*reviewInfo, error) {
-	posted, err := a.client.PostReview(ctx, owner, repo, number, req)
-	if err != nil {
-		return nil, err
-	}
-	return &reviewInfo{
-		ID:       posted.ID,
-		Body:     posted.Body,
-		User:     posted.User,
-		State:    posted.State,
-		CommitID: posted.CommitID,
-	}, nil
-}
-
-func (a *githubClientVCSAdapter) GetAuthenticatedUser(ctx context.Context) (string, error) {
-	return a.client.GetAuthenticatedUser(ctx)
-}
@@ -1,582 +0,0 @@
-package github
-
-import (
-	"context"
-	"encoding/base64"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"gitea.weiker.me/rodin/review-bot/vcs"
-)
-
-func TestGetPullRequest(t *testing.T) {
-	want := PullRequest{
-		Title: "My PR",
-		Body:  "Description",
-	}
-	want.Head.Sha = "abc123"
-	want.Head.Ref = "feature/foo"
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/pulls/42" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(want)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	pr, err := c.GetPullRequest(context.Background(), "owner", "repo", 42)
-	if err != nil {
-		t.Fatalf("GetPullRequest: %v", err)
-	}
-	if pr.Title != want.Title {
-		t.Errorf("Title = %q, want %q", pr.Title, want.Title)
-	}
-	if pr.Head.Sha != want.Head.Sha {
-		t.Errorf("Head.Sha = %q, want %q", pr.Head.Sha, want.Head.Sha)
-	}
-	if pr.Head.Ref != want.Head.Ref {
-		t.Errorf("Head.Ref = %q, want %q", pr.Head.Ref, want.Head.Ref)
-	}
-}
-
-func TestGetPullRequest_NotFound(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusNotFound)
-		w.Write([]byte("not found"))
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	_, err := c.GetPullRequest(context.Background(), "owner", "repo", 1)
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	if !IsNotFound(err) {
-		t.Errorf("expected IsNotFound, got %v", err)
-	}
-}
-
-func TestGetPullRequestDiff(t *testing.T) {
-	const wantDiff = "diff --git a/foo.go b/foo.go\n+added line\n"
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Header.Get("Accept") != "application/vnd.github.diff" {
-			t.Errorf("Accept = %q, want application/vnd.github.diff", r.Header.Get("Accept"))
-		}
-		w.Header().Set("Content-Type", "text/plain")
-		fmt.Fprint(w, wantDiff)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	diff, err := c.GetPullRequestDiff(context.Background(), "owner", "repo", 1)
-	if err != nil {
-		t.Fatalf("GetPullRequestDiff: %v", err)
-	}
-	if diff != wantDiff {
-		t.Errorf("diff = %q, want %q", diff, wantDiff)
-	}
-}
-
-func TestGetPullRequestDiff_TooLarge(t *testing.T) {
-	// Return a diff larger than DefaultMaxDiffSize.
-	hugeDiff := make([]byte, DefaultMaxDiffSize+1)
-	for i := range hugeDiff {
-		hugeDiff[i] = 'x'
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "text/plain")
-		w.Write(hugeDiff)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	_, err := c.GetPullRequestDiff(context.Background(), "owner", "repo", 1)
-	if err == nil {
-		t.Fatal("expected ErrDiffTooLarge, got nil")
-	}
-	if err != ErrDiffTooLarge {
-		t.Errorf("err = %v, want ErrDiffTooLarge", err)
-	}
-}
-
-func TestGetPullRequestFiles(t *testing.T) {
-	files := []ChangedFile{
-		{Filename: "foo.go", Status: "modified"},
-		{Filename: "bar.go", Status: "added"},
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/pulls/7/files" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(files)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.GetPullRequestFiles(context.Background(), "owner", "repo", 7)
-	if err != nil {
-		t.Fatalf("GetPullRequestFiles: %v", err)
-	}
-	if len(got) != len(files) {
-		t.Fatalf("len = %d, want %d", len(got), len(files))
-	}
-	for i, f := range files {
-		if got[i].Filename != f.Filename || got[i].Status != f.Status {
-			t.Errorf("file[%d] = %+v, want %+v", i, got[i], f)
-		}
-	}
-}
-
-func TestGetCommitStatuses(t *testing.T) {
-	statuses := []CommitStatus{
-		{Status: "success", Context: "ci/tests", Description: "All tests passed", TargetURL: "https://ci.example.com"},
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/commits/deadbeef/statuses" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(statuses)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.GetCommitStatuses(context.Background(), "owner", "repo", "deadbeef")
-	if err != nil {
-		t.Fatalf("GetCommitStatuses: %v", err)
-	}
-	if len(got) != 1 {
-		t.Fatalf("len = %d, want 1", len(got))
-	}
-	if got[0].Status != "success" || got[0].Context != "ci/tests" {
-		t.Errorf("status = %+v, want %+v", got[0], statuses[0])
-	}
-}
-
-func TestGetFileContent(t *testing.T) {
-	const wantContent = "package main\n\nfunc main() {}\n"
-	encoded := base64.StdEncoding.EncodeToString([]byte(wantContent))
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/contents/main.go" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(contentResponse{
-			Type:     "file",
-			Name:     "main.go",
-			Path:     "main.go",
-			Encoding: "base64",
-			Content:  encoded,
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.GetFileContent(context.Background(), "owner", "repo", "main.go")
-	if err != nil {
-		t.Fatalf("GetFileContent: %v", err)
-	}
-	if got != wantContent {
-		t.Errorf("content = %q, want %q", got, wantContent)
-	}
-}
-
-func TestGetFileContentRef(t *testing.T) {
-	const wantContent = "version: 2\n"
-	encoded := base64.StdEncoding.EncodeToString([]byte(wantContent))
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/contents/config.yml" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		if r.URL.Query().Get("ref") != "feature/x" {
-			t.Errorf("ref = %q, want feature/x", r.URL.Query().Get("ref"))
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(contentResponse{
-			Type:     "file",
-			Name:     "config.yml",
-			Path:     "config.yml",
-			Encoding: "base64",
-			Content:  encoded,
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.GetFileContentRef(context.Background(), "owner", "repo", "config.yml", "feature/x")
-	if err != nil {
-		t.Fatalf("GetFileContentRef: %v", err)
-	}
-	if got != wantContent {
-		t.Errorf("content = %q, want %q", got, wantContent)
-	}
-}
-
-func TestGetFileContent_NewlinesInBase64(t *testing.T) {
-	// GitHub inserts newlines every 60 chars in the base64-encoded content.
-	// Verify we strip them before decoding.
-	const wantContent = "hello world this is a long string that gets split by github with newlines in the base64 encoding"
-	rawEncoded := base64.StdEncoding.EncodeToString([]byte(wantContent))
-	// Insert newlines to simulate GitHub's format.
-	var chunked string
-	for i := 0; i < len(rawEncoded); i += 60 {
-		end := i + 60
-		if end > len(rawEncoded) {
-			end = len(rawEncoded)
-		}
-		chunked += rawEncoded[i:end] + "\n"
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(contentResponse{
-			Type:     "file",
-			Encoding: "base64",
-			Content:  chunked,
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.GetFileContent(context.Background(), "owner", "repo", "file.txt")
-	if err != nil {
-		t.Fatalf("GetFileContent: %v", err)
-	}
-	if got != wantContent {
-		t.Errorf("content = %q, want %q", got, wantContent)
-	}
-}
-
-func TestListContents_Directory(t *testing.T) {
-	entries := []ContentEntry{
-		{Name: "main.go", Path: "main.go", Type: "file"},
-		{Name: "lib", Path: "lib", Type: "dir"},
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/contents/" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(entries)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.ListContents(context.Background(), "owner", "repo", "")
-	if err != nil {
-		t.Fatalf("ListContents: %v", err)
-	}
-	if len(got) != len(entries) {
-		t.Fatalf("len = %d, want %d", len(got), len(entries))
-	}
-	for i, e := range entries {
-		if got[i].Name != e.Name || got[i].Type != e.Type {
-			t.Errorf("entry[%d] = %+v, want %+v", i, got[i], e)
-		}
-	}
-}
-
-func TestListContents_File(t *testing.T) {
-	// When path points to a single file, GitHub returns an object, not array.
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		// Return a single file object (not an array).
-		json.NewEncoder(w).Encode(contentResponse{
-			Type:     "file",
-			Name:     "README.md",
-			Path:     "README.md",
-			Encoding: "base64",
-			Content:  base64.StdEncoding.EncodeToString([]byte("# Hello")),
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.ListContents(context.Background(), "owner", "repo", "README.md")
-	if err != nil {
-		t.Fatalf("ListContents (file): %v", err)
-	}
-	if len(got) != 1 {
-		t.Fatalf("len = %d, want 1", len(got))
-	}
-	if got[0].Name != "README.md" || got[0].Type != "file" {
-		t.Errorf("entry = %+v", got[0])
-	}
-}
-
-func TestGetAuthenticatedUser(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/user" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(userResponse{Login: "rodin"})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	login, err := c.GetAuthenticatedUser(context.Background())
-	if err != nil {
-		t.Fatalf("GetAuthenticatedUser: %v", err)
-	}
-	if login != "rodin" {
-		t.Errorf("login = %q, want %q", login, "rodin")
-	}
-}
-
-func TestPostReview(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodPost {
-			t.Errorf("method = %s, want POST", r.Method)
-		}
-		if r.URL.Path != "/repos/owner/repo/pulls/5/reviews" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		var payload postReviewRequest
-		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-			t.Errorf("decode body: %v", err)
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-		if payload.Event != "REQUEST_CHANGES" {
-			t.Errorf("event = %q, want REQUEST_CHANGES", payload.Event)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(reviewResponse{
-			ID:    99,
-			Body:  payload.Body,
-			State: "CHANGES_REQUESTED",
-			User:  struct{ Login string `json:"login"` }{Login: "rodin"},
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	review, err := c.PostReview(context.Background(), "owner", "repo", 5, vcs.ReviewRequest{
-		Body:  "needs work",
-		Event: vcs.ReviewEventRequestChanges,
-	})
-	if err != nil {
-		t.Fatalf("PostReview: %v", err)
-	}
-	if review.ID != 99 {
-		t.Errorf("review.ID = %d, want 99", review.ID)
-	}
-	// Verify state translation: CHANGES_REQUESTED -> REQUEST_CHANGES
-	if review.State != "REQUEST_CHANGES" {
-		t.Errorf("review.State = %q, want REQUEST_CHANGES", review.State)
-	}
-	if review.User.Login != "rodin" {
-		t.Errorf("review.User.Login = %q, want rodin", review.User.Login)
-	}
-}
-
-func TestPostReview_ConflictingCommitIDs(t *testing.T) {
-	c := NewClient("tok", "https://api.github.com")
-	_, err := c.PostReview(context.Background(), "owner", "repo", 1, vcs.ReviewRequest{
-		Body:  "test",
-		Event: vcs.ReviewEventComment,
-		Comments: []vcs.ReviewComment{
-			{Path: "a.go", Position: 1, Body: "comment 1", CommitID: "sha1"},
-			{Path: "b.go", Position: 2, Body: "comment 2", CommitID: "sha2"},
-		},
-	})
-	if err == nil {
-		t.Fatal("expected ErrConflictingCommitIDs, got nil")
-	}
-	if err != ErrConflictingCommitIDs {
-		t.Errorf("err = %v, want ErrConflictingCommitIDs", err)
-	}
-}
-
-func TestListReviews(t *testing.T) {
-	reviews := []reviewResponse{
-		{ID: 1, Body: "lgtm", State: "APPROVED", User: struct{ Login string `json:"login"` }{Login: "alice"}},
-		{ID: 2, Body: "needs work", State: "CHANGES_REQUESTED", User: struct{ Login string `json:"login"` }{Login: "bob"}},
-	}
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/repos/owner/repo/pulls/3/reviews" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(reviews)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	got, err := c.ListReviews(context.Background(), "owner", "repo", 3)
-	if err != nil {
-		t.Fatalf("ListReviews: %v", err)
-	}
-	if len(got) != 2 {
-		t.Fatalf("len = %d, want 2", len(got))
-	}
-	if got[0].State != "APPROVED" {
-		t.Errorf("got[0].State = %q, want APPROVED", got[0].State)
-	}
-	if got[1].State != "REQUEST_CHANGES" {
-		t.Errorf("got[1].State = %q, want REQUEST_CHANGES (translated from CHANGES_REQUESTED)", got[1].State)
-	}
-}
-
-func TestDeleteReview_Pending(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodDelete {
-			t.Errorf("method = %s, want DELETE", r.Method)
-		}
-		if r.URL.Path != "/repos/owner/repo/pulls/1/reviews/42" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		w.WriteHeader(http.StatusNoContent)
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	err := c.DeleteReview(context.Background(), "owner", "repo", 1, 42)
-	if err != nil {
-		t.Fatalf("DeleteReview: %v", err)
-	}
-}
-
-func TestDeleteReview_Submitted_Returns422(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// GitHub returns 422 when trying to delete a submitted review.
-		w.WriteHeader(http.StatusUnprocessableEntity)
-		w.Write([]byte(`{"message":"Cannot delete a submitted review"}`))
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	err := c.DeleteReview(context.Background(), "owner", "repo", 1, 42)
-	if err == nil {
-		t.Fatal("expected error for submitted review deletion")
-	}
-	// Should be wrapped as ErrCannotDeleteSubmittedReview.
-	if !isErrCannotDeleteSubmittedReview(err) {
-		t.Errorf("err = %v, want ErrCannotDeleteSubmittedReview", err)
-	}
-}
-
-// isErrCannotDeleteSubmittedReview checks if err wraps ErrCannotDeleteSubmittedReview.
-func isErrCannotDeleteSubmittedReview(err error) bool {
-	return err != nil && errors.Is(err, ErrCannotDeleteSubmittedReview)
-}
-
-func TestDismissReview(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodPut {
-			t.Errorf("method = %s, want PUT", r.Method)
-		}
-		if r.URL.Path != "/repos/owner/repo/pulls/2/reviews/10/dismissals" {
-			t.Errorf("unexpected path: %s", r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-		var payload dismissReviewRequest
-		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-			t.Errorf("decode body: %v", err)
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-		if payload.Event != "DISMISS" {
-			t.Errorf("event = %q, want DISMISS", payload.Event)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(reviewResponse{ID: 10, State: "DISMISSED"})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	err := c.DismissReview(context.Background(), "owner", "repo", 2, 10, "outdated review")
-	if err != nil {
-		t.Fatalf("DismissReview: %v", err)
-	}
-}
-
-func TestDoRequestWithBody_RejectsHTTP(t *testing.T) {
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		t.Fatal("request should not have been sent")
-	}))
-	defer srv.Close()
-
-	// Without AllowInsecureHTTPForTest, HTTP should be rejected.
-	c := NewClient("tok", srv.URL)
-	_, err := c.doRequestWithBody(context.Background(), http.MethodPost, srv.URL+"/test", []byte(`{}`))
-	if err == nil {
-		t.Fatal("expected error for HTTP request")
-	}
-}
-
-func TestPostReview_CommitIDFromRequest(t *testing.T) {
-	const wantCommitID = "abc123def456"
-
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		var payload postReviewRequest
-		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
-			t.Errorf("decode body: %v", err)
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-		if payload.CommitID != wantCommitID {
-			t.Errorf("commit_id = %q, want %q", payload.CommitID, wantCommitID)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(reviewResponse{
-			ID:       1,
-			Body:     payload.Body,
-			State:    "COMMENTED",
-			CommitID: payload.CommitID,
-			User:     struct{ Login string `json:"login"` }{Login: "rodin"},
-		})
-	}))
-	defer srv.Close()
-
-	c := NewClient("tok", srv.URL, AllowInsecureHTTPForTest())
-	review, err := c.PostReview(context.Background(), "owner", "repo", 1, vcs.ReviewRequest{
-		Body:     "looks good",
-		Event:    vcs.ReviewEventApprove,
-		CommitID: wantCommitID,
-	})
-	if err != nil {
-		t.Fatalf("PostReview: %v", err)
-	}
-	if review.CommitID != wantCommitID {
-		t.Errorf("review.CommitID = %q, want %q", review.CommitID, wantCommitID)
-	}
-}
@@ -4,10 +4,7 @@
 package github

 import (
-	"bytes"
 	"context"
-	"encoding/base64"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -95,6 +92,10 @@ func asAPIError(err error) (*APIError, bool) {
 // SetHTTPClient and SetRetryBackoff are intended for test setup only and must
 // be called before any goroutines issue requests; they have no synchronization.
 type Client struct {
+	// TODO: baseURL is populated by NewClient but not yet consumed by doRequest/doGet.
+	// Higher-level exported methods (GetPullRequest, etc.) will use it to
+	// construct request URLs; remove this field if those methods end up
+	// accepting full URLs instead.
 	baseURL    string
 	token      string
 	httpClient *http.Client
@@ -375,283 +376,3 @@ func (c *Client) doRequest(ctx context.Context, method, reqURL string, accept st
 func (c *Client) doGet(ctx context.Context, url string) ([]byte, error) {
 	return c.doRequest(ctx, http.MethodGet, url, "")
 }
-
-// DefaultMaxDiffSize is the default maximum diff size in bytes (10 MB).
-const DefaultMaxDiffSize = 10 * 1024 * 1024
-
-// ErrDiffTooLarge is returned when a PR diff exceeds the configured MaxDiffSize.
-var ErrDiffTooLarge = errors.New("diff size exceeds maximum allowed size")
-
-// PullRequest holds relevant PR metadata.
-type PullRequest struct {
-	Title string `json:"title"`
-	Body  string `json:"body"`
-	Head  struct {
-		Sha string `json:"sha"`
-		Ref string `json:"ref"`
-	} `json:"head"`
-}
-
-// CommitStatus represents a single CI status entry.
-type CommitStatus struct {
-	Status      string `json:"state"`
-	Context     string `json:"context"`
-	Description string `json:"description"`
-	TargetURL   string `json:"target_url"`
-}
-
-// ChangedFile represents a file modified in a PR.
-type ChangedFile struct {
-	Filename string `json:"filename"`
-	Status   string `json:"status"`
-}
-
-// ContentEntry represents a file or directory in a repository.
-type ContentEntry struct {
-	Name string `json:"name"`
-	Path string `json:"path"`
-	Type string `json:"type"`
-}
-
-// contentResponse is the GitHub API response for a single file's content.
-type contentResponse struct {
-	Content  string `json:"content"`
-	Encoding string `json:"encoding"`
-	Type     string `json:"type"`
-	Name     string `json:"name"`
-	Path     string `json:"path"`
-}
-
-// GetPullRequest fetches PR metadata.
-func (c *Client) GetPullRequest(ctx context.Context, owner, repo string, number int) (*PullRequest, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number)
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return nil, fmt.Errorf("fetch PR: %w", err)
-	}
-	var pr PullRequest
-	if err := json.Unmarshal(body, &pr); err != nil {
-		return nil, fmt.Errorf("parse PR response: %w", err)
-	}
-	return &pr, nil
-}
-
-// GetPullRequestFiles fetches the list of files changed in a PR.
-func (c *Client) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]ChangedFile, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/files",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number)
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return nil, fmt.Errorf("fetch PR files: %w", err)
-	}
-	var files []ChangedFile
-	if err := json.Unmarshal(body, &files); err != nil {
-		return nil, fmt.Errorf("parse PR files response: %w", err)
-	}
-	return files, nil
-}
-
-// GetCommitStatuses fetches CI statuses for a commit SHA.
-func (c *Client) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]CommitStatus, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/commits/%s/statuses",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), url.PathEscape(sha))
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return nil, fmt.Errorf("fetch commit statuses: %w", err)
-	}
-	var statuses []CommitStatus
-	if err := json.Unmarshal(body, &statuses); err != nil {
-		return nil, fmt.Errorf("parse commit statuses response: %w", err)
-	}
-	return statuses, nil
-}
-
-// decodeFileContent decodes the content from a GitHub contents API response.
-// GitHub returns content as base64-encoded string with newlines inserted;
-// this function strips the newlines before decoding.
-func decodeFileContent(resp contentResponse) (string, error) {
-	if resp.Encoding != "base64" {
-		return "", fmt.Errorf("unsupported content encoding: %q", resp.Encoding)
-	}
-	// GitHub inserts newlines every 60 characters; strip them before decoding.
-	stripped := strings.ReplaceAll(resp.Content, "\n", "")
-	decoded, err := base64.StdEncoding.DecodeString(stripped)
-	if err != nil {
-		return "", fmt.Errorf("decode base64 content: %w", err)
-	}
-	return string(decoded), nil
-}
-
-// GetFileContent fetches the content of a file at the default branch HEAD.
-func (c *Client) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
-	return c.GetFileContentRef(ctx, owner, repo, filepath, "")
-}
-
-// GetFileContentRef fetches the content of a file at the given ref (branch, tag, or SHA).
-// If ref is empty, the default branch is used.
-func (c *Client) GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/contents/%s",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), escapePath(filepath))
-	if ref != "" {
-		reqURL += "?ref=" + url.QueryEscape(ref)
-	}
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return "", fmt.Errorf("fetch file content %q: %w", filepath, err)
-	}
-	var resp contentResponse
-	if err := json.Unmarshal(body, &resp); err != nil {
-		return "", fmt.Errorf("parse file content response: %w", err)
-	}
-	content, err := decodeFileContent(resp)
-	if err != nil {
-		return "", fmt.Errorf("decode file content %q: %w", filepath, err)
-	}
-	return content, nil
-}
-
-// ListContents lists the files and directories at the given path.
-// If path points to a file instead of a directory, it returns a single-entry slice.
-func (c *Client) ListContents(ctx context.Context, owner, repo, path string) ([]ContentEntry, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/contents/%s",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), escapePath(path))
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return nil, fmt.Errorf("list contents %q: %w", path, err)
-	}
-
-	// The GitHub API returns an array for directories and an object for files.
-	// Try array first; if it fails, try object and wrap in a slice.
-	var entries []ContentEntry
-	if err := json.Unmarshal(body, &entries); err == nil {
-		return entries, nil
-	}
-
-	// Try as a single ContentEntry (file path).
-	var single contentResponse
-	if err := json.Unmarshal(body, &single); err != nil {
-		return nil, fmt.Errorf("parse contents response for %q: %w", path, err)
-	}
-	return []ContentEntry{{
-		Name: single.Name,
-		Path: single.Path,
-		Type: single.Type,
-	}}, nil
-}
-
-// doRequestWithBody performs an HTTP request with a JSON request body.
-// Unlike doRequest, it does NOT retry — write operations should not be
-// retried automatically.
-func (c *Client) doRequestWithBody(ctx context.Context, method, reqURL string, data []byte) ([]byte, error) {
-	if !c.allowInsecureHTTP {
-		parsed, err := url.Parse(reqURL)
-		if err != nil {
-			return nil, fmt.Errorf("parse request URL: %w", err)
-		}
-		if strings.EqualFold(parsed.Scheme, "http") {
-			return nil, fmt.Errorf("refusing HTTP request to %s: use HTTPS or set AllowInsecureHTTP option", redactURL(reqURL))
-		}
-	}
-
-	var bodyReader *bytes.Reader
-	if data != nil {
-		bodyReader = bytes.NewReader(data)
-	} else {
-		bodyReader = bytes.NewReader(nil)
-	}
-
-	req, err := http.NewRequestWithContext(ctx, method, reqURL, bodyReader)
-	if err != nil {
-		return nil, fmt.Errorf("create request: %w", err)
-	}
-	req.Header.Set("Authorization", "Bearer "+c.token)
-	req.Header.Set("Accept", "application/vnd.github+json")
-	if data != nil {
-		req.Header.Set("Content-Type", "application/json")
-	}
-
-	resp, err := c.httpClient.Do(req)
-	if err != nil {
-		return nil, fmt.Errorf("do request: %w", err)
-	}
-
-	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
-		body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseBodyBytes))
-		resp.Body.Close()
-		if err != nil {
-			return nil, fmt.Errorf("read response body: %w", err)
-		}
-		return body, nil
-	}
-
-	errBody, _ := io.ReadAll(io.LimitReader(resp.Body, maxErrorBodyBytes))
-	resp.Body.Close()
-
-	return nil, &APIError{StatusCode: resp.StatusCode, Body: string(errBody)}
-}
-
-// escapePath escapes each segment of a file path for use in URL path components.
-// Slashes are preserved as separators; individual segments are PathEscaped.
-func escapePath(p string) string {
-	parts := strings.Split(p, "/")
-	for i, part := range parts {
-		parts[i] = url.PathEscape(part)
-	}
-	return strings.Join(parts, "/")
-}
-
-// GetPullRequestDiff fetches the unified diff for a PR.
-// Returns ErrDiffTooLarge if the response exceeds DefaultMaxDiffSize bytes.
-//
-// It reads up to DefaultMaxDiffSize+1 bytes and checks for truncation:
-// if exactly DefaultMaxDiffSize+1 bytes are available, the diff is too large.
-func (c *Client) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number)
-
-	if !c.allowInsecureHTTP {
-		parsed, err := url.Parse(reqURL)
-		if err != nil {
-			return "", fmt.Errorf("parse request URL: %w", err)
-		}
-		if strings.EqualFold(parsed.Scheme, "http") {
-			return "", fmt.Errorf("refusing HTTP request to %s: use HTTPS or set AllowInsecureHTTP option", redactURL(reqURL))
-		}
-	}
-
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, nil)
-	if err != nil {
-		return "", fmt.Errorf("create PR diff request: %w", err)
-	}
-	req.Header.Set("Authorization", "Bearer "+c.token)
-	req.Header.Set("Accept", "application/vnd.github.diff")
-
-	resp, err := c.httpClient.Do(req)
-	if err != nil {
-		return "", fmt.Errorf("fetch PR diff: %w", err)
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
-		errBody, _ := io.ReadAll(io.LimitReader(resp.Body, maxErrorBodyBytes))
-		return "", &APIError{StatusCode: resp.StatusCode, Body: string(errBody)}
-	}
-
-	// Read up to DefaultMaxDiffSize+1 bytes. If we get exactly that many,
-	// the diff exceeds the limit.
-	limit := int64(DefaultMaxDiffSize) + 1
-	raw, err := io.ReadAll(io.LimitReader(resp.Body, limit))
-	if err != nil {
-		return "", fmt.Errorf("read PR diff: %w", err)
-	}
-	if int64(len(raw)) == limit {
-		return "", ErrDiffTooLarge
-	}
-	return string(raw), nil
-}
@@ -1,29 +0,0 @@
-package github
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-)
-
-// userResponse is the GitHub API response for the authenticated user.
-type userResponse struct {
-	Login string `json:"login"`
-}
-
-// GetAuthenticatedUser returns the login of the currently authenticated user.
-func (c *Client) GetAuthenticatedUser(ctx context.Context) (string, error) {
-	reqURL := fmt.Sprintf("%s/user", c.baseURL)
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return "", fmt.Errorf("get authenticated user: %w", err)
-	}
-
-	var resp userResponse
-	if err := json.Unmarshal(body, &resp); err != nil {
-		return "", fmt.Errorf("parse user response: %w", err)
-	}
-
-	return resp.Login, nil
-}
@@ -0,0 +1,552 @@
+// Package github provides a client for the GitHub API.
+// This file contains the higher-level PR/review methods built on top of the
+// HTTP client in client.go. All methods use GitHub REST API v3 paths.
+package github
+
+import (
+	"bytes"
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+// PullRequest holds relevant PR metadata.
+type PullRequest struct {
+	Title string `json:"title"`
+	Body  string `json:"body"`
+	Head  struct {
+		Sha string `json:"sha"`
+		Ref string `json:"ref"`
+	} `json:"head"`
+}
+
+// CommitStatus represents a single CI status entry.
+// GitHub uses "state" (success/failure/pending/error) unlike Gitea's "status".
+type CommitStatus struct {
+	State       string `json:"state"`
+	Context     string `json:"context"`
+	Description string `json:"description"`
+	TargetURL   string `json:"target_url"`
+}
+
+// ChangedFile represents a file modified in a PR.
+type ChangedFile struct {
+	Filename string `json:"filename"`
+	Status   string `json:"status"`
+}
+
+// ReviewComment represents an inline comment to attach to a review.
+// GitHub uses "path" + "position" or "line" for positioning.
+type ReviewComment struct {
+	ID   int64  `json:"id,omitempty"`
+	Path string `json:"path"`
+	// Position is the line position in the diff (used when submitting).
+	// Side+Line is an alternative for GitHub (line in the file), but
+	// we mirror the Gitea interface using NewPosition mapped to position.
+	Position int64  `json:"position,omitempty"`
+	Body     string `json:"body"`
+}
+
+// ContentEntry represents a file or directory entry from the contents API.
+type ContentEntry struct {
+	Name string `json:"name"`
+	Path string `json:"path"`
+	Type string `json:"type"` // "file" or "dir"
+}
+
+// Review represents a pull request review.
+type Review struct {
+	ID   int64  `json:"id"`
+	Body string `json:"body"`
+	User struct {
+		Login string `json:"login"`
+	} `json:"user"`
+	State    string `json:"state"`
+	CommitID string `json:"commit_id"`
+}
+
+// GetPullRequest fetches PR metadata.
+func (c *Client) GetPullRequest(ctx context.Context, owner, repo string, number int) (*PullRequest, error) {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		number)
+	body, err := c.doGet(ctx, reqURL)
+	if err != nil {
+		return nil, fmt.Errorf("fetch PR: %w", err)
+	}
+	var pr PullRequest
+	if err := json.Unmarshal(body, &pr); err != nil {
+		return nil, fmt.Errorf("parse PR JSON: %w", err)
+	}
+	return &pr, nil
+}
+
+// GetPullRequestDiff fetches the unified diff for a PR.
+func (c *Client) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		number)
+	body, err := c.doRequest(ctx, http.MethodGet, reqURL, "application/vnd.github.v3.diff")
+	if err != nil {
+		return "", fmt.Errorf("fetch diff: %w", err)
+	}
+	return string(body), nil
+}
+
+// GetPullRequestFiles fetches the list of files changed in a PR.
+// GitHub paginates at 30 files/page (max 3000 files total).
+func (c *Client) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]ChangedFile, error) {
+	const perPage = 100
+	var all []ChangedFile
+	for page := 1; ; page++ {
+		reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/files?per_page=%d&page=%d",
+			c.baseURL,
+			url.PathEscape(owner),
+			url.PathEscape(repo),
+			number,
+			perPage,
+			page)
+		body, err := c.doGet(ctx, reqURL)
+		if err != nil {
+			return nil, fmt.Errorf("fetch PR files (page %d): %w", page, err)
+		}
+		var batch []ChangedFile
+		if err := json.Unmarshal(body, &batch); err != nil {
+			return nil, fmt.Errorf("parse PR files JSON (page %d): %w", page, err)
+		}
+		all = append(all, batch...)
+		if len(batch) < perPage {
+			break
+		}
+	}
+	return all, nil
+}
+
+// GetCommitStatuses fetches CI statuses for a commit SHA.
+// GitHub's combined status endpoint returns the most-relevant state per context.
+func (c *Client) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]CommitStatus, error) {
+	const perPage = 100
+	var all []CommitStatus
+	for page := 1; ; page++ {
+		reqURL := fmt.Sprintf("%s/repos/%s/%s/commits/%s/statuses?per_page=%d&page=%d",
+			c.baseURL,
+			url.PathEscape(owner),
+			url.PathEscape(repo),
+			url.PathEscape(sha),
+			perPage,
+			page)
+		body, err := c.doGet(ctx, reqURL)
+		if err != nil {
+			return nil, fmt.Errorf("fetch commit statuses: %w", err)
+		}
+		var batch []CommitStatus
+		if err := json.Unmarshal(body, &batch); err != nil {
+			return nil, fmt.Errorf("parse statuses JSON: %w", err)
+		}
+		all = append(all, batch...)
+		if len(batch) < perPage {
+			break
+		}
+	}
+	return all, nil
+}
+
+// GetFileContent fetches a file from the default branch of a repo.
+// GitHub's contents API returns base64-encoded content.
+func (c *Client) GetFileContent(ctx context.Context, owner, repo, filepath string) (string, error) {
+	return c.GetFileContentRef(ctx, owner, repo, filepath, "")
+}
+
+// GetFileContentRef fetches a file from a specific ref (branch/tag/sha) in a repo.
+func (c *Client) GetFileContentRef(ctx context.Context, owner, repo, filepath, ref string) (string, error) {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/contents/%s",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		escapePath(filepath))
+	if ref != "" {
+		reqURL += "?ref=" + url.QueryEscape(ref)
+	}
+	body, err := c.doGet(ctx, reqURL)
+	if err != nil {
+		return "", fmt.Errorf("fetch file %s: %w", filepath, err)
+	}
+	// GitHub returns JSON with base64-encoded content
+	var result struct {
+		Content  string `json:"content"`
+		Encoding string `json:"encoding"`
+	}
+	if err := json.Unmarshal(body, &result); err != nil {
+		return "", fmt.Errorf("parse file content JSON: %w", err)
+	}
+	if result.Encoding != "base64" {
+		return "", fmt.Errorf("unexpected encoding %q for file %s", result.Encoding, filepath)
+	}
+	// GitHub wraps base64 content in newlines — strip them before decoding
+	cleaned := strings.ReplaceAll(result.Content, "\n", "")
+	decoded, err := base64.StdEncoding.DecodeString(cleaned)
+	if err != nil {
+		return "", fmt.Errorf("decode file content: %w", err)
+	}
+	return string(decoded), nil
+}
+
+// ListContents lists files and directories at a given path in a repo.
+// Pass an empty path to list the repository root.
+func (c *Client) ListContents(ctx context.Context, owner, repo, path string) ([]ContentEntry, error) {
+	if path == "." {
+		path = ""
+	}
+	var reqURL string
+	if path == "" {
+		reqURL = fmt.Sprintf("%s/repos/%s/%s/contents",
+			c.baseURL, url.PathEscape(owner), url.PathEscape(repo))
+	} else {
+		reqURL = fmt.Sprintf("%s/repos/%s/%s/contents/%s",
+			c.baseURL, url.PathEscape(owner), url.PathEscape(repo), escapePath(path))
+	}
+	body, err := c.doGet(ctx, reqURL)
+	if err != nil {
+		return nil, fmt.Errorf("list contents %s: %w", path, err)
+	}
+	var entries []ContentEntry
+	if err := json.Unmarshal(body, &entries); err != nil {
+		// GitHub also returns a single object when path is a file
+		var single ContentEntry
+		if err2 := json.Unmarshal(body, &single); err2 != nil {
+			return nil, fmt.Errorf("parse contents JSON: %w", err)
+		}
+		if single.Name == "" && single.Path == "" {
+			return nil, fmt.Errorf("parse contents JSON: empty response for path %q", path)
+		}
+		entries = []ContentEntry{single}
+	}
+	return entries, nil
+}
+
+// GetAllFilesInPath recursively fetches all file contents under a path.
+// If the path is a file, returns just that file's content.
+func (c *Client) GetAllFilesInPath(ctx context.Context, owner, repo, path string) (map[string]string, error) {
+	results := make(map[string]string)
+
+	entries, err := c.ListContents(ctx, owner, repo, path)
+	if err != nil {
+		if IsNotFound(err) {
+			// Try fetching as a file directly
+			content, fileErr := c.GetFileContent(ctx, owner, repo, path)
+			if fileErr != nil {
+				return nil, fmt.Errorf("path %q is neither a file nor directory: %w", path, fileErr)
+			}
+			results[path] = content
+			return results, nil
+		}
+		return nil, fmt.Errorf("list contents %q: %w", path, err)
+	}
+
+	for _, entry := range entries {
+		switch entry.Type {
+		case "file":
+			content, err := c.GetFileContent(ctx, owner, repo, entry.Path)
+			if err != nil {
+				slog.Warn("could not fetch file from patterns repo", "file", entry.Path, "error", err)
+				continue
+			}
+			results[entry.Path] = content
+		case "dir":
+			subResults, err := c.GetAllFilesInPath(ctx, owner, repo, entry.Path)
+			if err != nil {
+				slog.Warn("could not recurse into directory", "dir", entry.Path, "error", err)
+				continue
+			}
+			for k, v := range subResults {
+				results[k] = v
+			}
+		}
+	}
+	return results, nil
+}
+
+// PostReview submits a review to a PR and returns the created review.
+// event should be "APPROVE", "REQUEST_CHANGES", or "COMMENT".
+// commitID anchors the review to a specific commit SHA.
+// comments are optional inline comments.
+//
+// Note: GitHub uses "APPROVE" (not "APPROVED") for the event name.
+func (c *Client) PostReview(ctx context.Context, owner, repo string, number int, event, body, commitID string, comments []ReviewComment) (*Review, error) {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		number)
+
+	// GitHub uses "APPROVE" not "APPROVED", "REQUEST_CHANGES" and "COMMENT" match
+	ghEvent := event
+	if event == "APPROVED" {
+		ghEvent = "APPROVE"
+	}
+
+	payload := struct {
+		Body     string          `json:"body"`
+		Event    string          `json:"event"`
+		CommitID string          `json:"commit_id,omitempty"`
+		Comments []ReviewComment `json:"comments,omitempty"`
+	}{
+		Body:     body,
+		Event:    ghEvent,
+		CommitID: commitID,
+		Comments: comments,
+	}
+
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return nil, fmt.Errorf("marshal review payload: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, reqURL, bytes.NewReader(data))
+	if err != nil {
+		return nil, fmt.Errorf("create review request: %w", err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/vnd.github+json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("post review: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		respBody, _ := io.ReadAll(io.LimitReader(resp.Body, 64*1024))
+		return nil, fmt.Errorf("post review failed (status %d): %s", resp.StatusCode, string(respBody))
+	}
+
+	respBody, err := io.ReadAll(io.LimitReader(resp.Body, 10*1024*1024))
+	if err != nil {
+		return nil, fmt.Errorf("read review response: %w", err)
+	}
+	var review Review
+	if err := json.Unmarshal(respBody, &review); err != nil {
+		return nil, fmt.Errorf("parse review response: %w", err)
+	}
+	return &review, nil
+}
+
+// ListReviews returns all reviews on a pull request.
+func (c *Client) ListReviews(ctx context.Context, owner, repo string, number int) ([]Review, error) {
+	const perPage = 100
+	var all []Review
+	for page := 1; ; page++ {
+		reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews?per_page=%d&page=%d",
+			c.baseURL,
+			url.PathEscape(owner),
+			url.PathEscape(repo),
+			number,
+			perPage,
+			page)
+		body, err := c.doGet(ctx, reqURL)
+		if err != nil {
+			return nil, fmt.Errorf("list reviews (page %d): %w", page, err)
+		}
+		var batch []Review
+		if err := json.Unmarshal(body, &batch); err != nil {
+			return nil, fmt.Errorf("parse reviews (page %d): %w", page, err)
+		}
+		all = append(all, batch...)
+		if len(batch) < perPage {
+			break
+		}
+	}
+	return all, nil
+}
+
+// DeleteReview deletes a review by ID.
+func (c *Client) DeleteReview(ctx context.Context, owner, repo string, number int, reviewID int64) error {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews/%d",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		number,
+		reviewID)
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodDelete, reqURL, nil)
+	if err != nil {
+		return fmt.Errorf("create delete request: %w", err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Accept", "application/vnd.github+json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("delete review: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		respBody, _ := io.ReadAll(io.LimitReader(resp.Body, 256))
+		return fmt.Errorf("delete review failed (status %d): %s", resp.StatusCode, string(respBody))
+	}
+	return nil
+}
+
+// GetAuthenticatedUser returns the login of the user authenticated by the token.
+func (c *Client) GetAuthenticatedUser(ctx context.Context) (string, error) {
+	reqURL := fmt.Sprintf("%s/user", c.baseURL)
+	body, err := c.doGet(ctx, reqURL)
+	if err != nil {
+		return "", fmt.Errorf("get authenticated user: %w", err)
+	}
+	var result struct {
+		Login string `json:"login"`
+	}
+	if err := json.Unmarshal(body, &result); err != nil {
+		return "", fmt.Errorf("parse user response: %w", err)
+	}
+	return result.Login, nil
+}
+
+// RequestReviewer adds the given user as a requested reviewer on a pull request.
+// This is idempotent on GitHub — requesting an already-requested reviewer succeats.
+func (c *Client) RequestReviewer(ctx context.Context, owner, repo string, number int, reviewer string) error {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/requested_reviewers",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		number)
+
+	payload := struct {
+		Reviewers []string `json:"reviewers"`
+	}{Reviewers: []string{reviewer}}
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return fmt.Errorf("marshal reviewer request: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, reqURL, bytes.NewReader(data))
+	if err != nil {
+		return fmt.Errorf("create reviewer request: %w", err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/vnd.github+json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("request reviewer: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		respBody, _ := io.ReadAll(io.LimitReader(resp.Body, 256))
+		return fmt.Errorf("request reviewer failed (status %d): %s", resp.StatusCode, string(respBody))
+	}
+	return nil
+}
+
+// EditComment updates the body of a PR review comment.
+// GitHub uses PATCH /repos/{owner}/{repo}/pulls/comments/{comment_id}.
+func (c *Client) EditComment(ctx context.Context, owner, repo string, commentID int64, newBody string) error {
+	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/comments/%d",
+		c.baseURL,
+		url.PathEscape(owner),
+		url.PathEscape(repo),
+		commentID)
+
+	payload := struct {
+		Body string `json:"body"`
+	}{Body: newBody}
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return fmt.Errorf("marshal edit payload: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPatch, reqURL, bytes.NewReader(data))
+	if err != nil {
+		return fmt.Errorf("create edit request: %w", err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/vnd.github+json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("edit comment: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(io.LimitReader(resp.Body, 256))
+		return fmt.Errorf("edit comment failed (status %d): %s", resp.StatusCode, body)
+	}
+	return nil
+}
+
+// ListReviewComments returns the inline comments attached to a specific review.
+func (c *Client) ListReviewComments(ctx context.Context, owner, repo string, prNumber int, reviewID int64) ([]ReviewComment, error) {
+	const perPage = 100
+	var all []ReviewComment
+	for page := 1; ; page++ {
+		reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews/%d/comments?per_page=%d&page=%d",
+			c.baseURL,
+			url.PathEscape(owner),
+			url.PathEscape(repo),
+			prNumber,
+			reviewID,
+			perPage,
+			page)
+		body, err := c.doGet(ctx, reqURL)
+		if err != nil {
+			return nil, fmt.Errorf("list review comments (page %d): %w", page, err)
+		}
+		var batch []ReviewComment
+		if err := json.Unmarshal(body, &batch); err != nil {
+			return nil, fmt.Errorf("parse review comments (page %d): %w", page, err)
+		}
+		all = append(all, batch...)
+		if len(batch) < perPage {
+			break
+		}
+	}
+	return all, nil
+}
+
+// ResolveComment is a no-op on GitHub. GitHub does not support resolving
+// individual review comments via the REST API (only via the GraphQL API).
+// This method exists to satisfy the VCSClient interface.
+func (c *Client) ResolveComment(_ context.Context, _, _ string, _ int64) error {
+	return nil
+}
+
+// GetTimelineReviewCommentIDForReview finds the timeline comment ID for a review.
+// GitHub doesn't have a direct timeline event endpoint for reviews the way Gitea does.
+// This is primarily used by the supersede path (EditComment + ResolveComment). On GitHub,
+// we return the review ID itself. Note that EditComment on GitHub uses the
+// /pulls/comments/{id} endpoint (for inline review comments), which does not
+// apply to review bodies — the supersede EditComment call will 404 and be
+// logged as a warning. This is a known limitation; the review is still posted
+// correctly regardless.
+func (c *Client) GetTimelineReviewCommentIDForReview(_ context.Context, _, _ string, _ int, reviewID int64) (int64, error) {
+	return reviewID, nil
+}
+
+// escapePath escapes each path segment individually while preserving slashes.
+// This avoids double-escaping the forward slash separator in file paths.
+// NOTE: Intentionally duplicated from gitea/client.go to keep the packages independent.
+func escapePath(p string) string {
+	parts := strings.Split(p, "/")
+	escaped := make([]string, len(parts))
+	for i, part := range parts {
+		escaped[i] = url.PathEscape(part)
+	}
+	return strings.Join(escaped, "/")
+}
@@ -0,0 +1,518 @@
+package github
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+// newTestClient creates a Client pointed at the test server.
+func newTestClient(srv *httptest.Server) *Client {
+	return NewClient("test-token", srv.URL, AllowInsecureHTTPForTest())
+}
+
+func TestGetPullRequest(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet || r.URL.Path != "/repos/owner/repo/pulls/42" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		if got := r.Header.Get("Authorization"); got != "Bearer test-token" {
+			http.Error(w, "unauthorized", http.StatusUnauthorized)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `{"title":"Fix bug","body":"Body text","head":{"sha":"abc1234","ref":"fix/bug"}}`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	pr, err := c.GetPullRequest(context.Background(), "owner", "repo", 42)
+	if err != nil {
+		t.Fatalf("GetPullRequest: %v", err)
+	}
+	if pr.Title != "Fix bug" {
+		t.Errorf("Title = %q, want %q", pr.Title, "Fix bug")
+	}
+	if pr.Head.Sha != "abc1234" {
+		t.Errorf("Head.Sha = %q, want %q", pr.Head.Sha, "abc1234")
+	}
+	if pr.Head.Ref != "fix/bug" {
+		t.Errorf("Head.Ref = %q, want %q", pr.Head.Ref, "fix/bug")
+	}
+}
+
+func TestGetPullRequest_NotFound(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.Error(w, `{"message":"Not Found"}`, http.StatusNotFound)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	_, err := c.GetPullRequest(context.Background(), "owner", "repo", 99)
+	if err == nil {
+		t.Fatal("expected error for 404, got nil")
+	}
+	if !IsNotFound(err) {
+		t.Errorf("expected IsNotFound error, got %v", err)
+	}
+}
+
+func TestGetPullRequestDiff(t *testing.T) {
+	diffText := "diff --git a/foo.go b/foo.go\n@@ -1,1 +1,2 @@\n+added"
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/pulls/1" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		if r.Header.Get("Accept") != "application/vnd.github.v3.diff" {
+			http.Error(w, "wrong accept", http.StatusNotAcceptable)
+			return
+		}
+		w.Header().Set("Content-Type", "text/plain")
+		fmt.Fprint(w, diffText)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	got, err := c.GetPullRequestDiff(context.Background(), "owner", "repo", 1)
+	if err != nil {
+		t.Fatalf("GetPullRequestDiff: %v", err)
+	}
+	if got != diffText {
+		t.Errorf("diff = %q, want %q", got, diffText)
+	}
+}
+
+func TestGetPullRequestFiles(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/pulls/5/files" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `[{"filename":"foo.go","status":"added"},{"filename":"bar.go","status":"modified"}]`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	files, err := c.GetPullRequestFiles(context.Background(), "owner", "repo", 5)
+	if err != nil {
+		t.Fatalf("GetPullRequestFiles: %v", err)
+	}
+	if len(files) != 2 {
+		t.Fatalf("len(files) = %d, want 2", len(files))
+	}
+	if files[0].Filename != "foo.go" || files[0].Status != "added" {
+		t.Errorf("files[0] = %+v", files[0])
+	}
+}
+
+func TestGetCommitStatuses(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/commits/deadbeef/statuses" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `[{"state":"success","context":"ci/test","description":"Tests passed","target_url":"https://ci.example.com"}]`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	statuses, err := c.GetCommitStatuses(context.Background(), "owner", "repo", "deadbeef")
+	if err != nil {
+		t.Fatalf("GetCommitStatuses: %v", err)
+	}
+	if len(statuses) != 1 {
+		t.Fatalf("len(statuses) = %d, want 1", len(statuses))
+	}
+	if statuses[0].State != "success" {
+		t.Errorf("State = %q, want success", statuses[0].State)
+	}
+	if statuses[0].Context != "ci/test" {
+		t.Errorf("Context = %q, want ci/test", statuses[0].Context)
+	}
+}
+
+func TestGetFileContent(t *testing.T) {
+	content := "package main\nfunc main() {}\n"
+	encoded := base64.StdEncoding.EncodeToString([]byte(content))
+	// GitHub wraps base64 in newlines every 60 chars
+	var chunked string
+	for i := 0; i < len(encoded); i += 60 {
+		end := i + 60
+		if end > len(encoded) {
+			end = len(encoded)
+		}
+		chunked += encoded[i:end] + "\n"
+	}
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/contents/main.go" {
+			http.Error(w, "unexpected path: "+r.URL.Path, http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		resp := map[string]string{
+			"content":  chunked,
+			"encoding": "base64",
+		}
+		if err := json.NewEncoder(w).Encode(resp); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	got, err := c.GetFileContent(context.Background(), "owner", "repo", "main.go")
+	if err != nil {
+		t.Fatalf("GetFileContent: %v", err)
+	}
+	if got != content {
+		t.Errorf("content = %q, want %q", got, content)
+	}
+}
+
+func TestGetFileContentRef(t *testing.T) {
+	content := "hello world"
+	encoded := base64.StdEncoding.EncodeToString([]byte(content))
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/contents/README.md" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		if r.URL.Query().Get("ref") != "abc123" {
+			http.Error(w, "missing ref", http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		resp := map[string]string{"content": encoded + "\n", "encoding": "base64"}
+		if err := json.NewEncoder(w).Encode(resp); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	got, err := c.GetFileContentRef(context.Background(), "owner", "repo", "README.md", "abc123")
+	if err != nil {
+		t.Fatalf("GetFileContentRef: %v", err)
+	}
+	if got != content {
+		t.Errorf("content = %q, want %q", got, content)
+	}
+}
+
+func TestListContents(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/repos/owner/repo/contents" {
+			w.Header().Set("Content-Type", "application/json")
+			fmt.Fprintln(w, `[{"name":"README.md","path":"README.md","type":"file"},{"name":"src","path":"src","type":"dir"}]`)
+			return
+		}
+		http.Error(w, "unexpected: "+r.URL.Path, http.StatusNotFound)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	entries, err := c.ListContents(context.Background(), "owner", "repo", "")
+	if err != nil {
+		t.Fatalf("ListContents: %v", err)
+	}
+	if len(entries) != 2 {
+		t.Fatalf("len(entries) = %d, want 2", len(entries))
+	}
+	if entries[0].Name != "README.md" || entries[0].Type != "file" {
+		t.Errorf("entries[0] = %+v", entries[0])
+	}
+	if entries[1].Name != "src" || entries[1].Type != "dir" {
+		t.Errorf("entries[1] = %+v", entries[1])
+	}
+}
+
+func TestListContents_Dot(t *testing.T) {
+	// "." should be treated as "" (root)
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/repos/owner/repo/contents" {
+			w.Header().Set("Content-Type", "application/json")
+			fmt.Fprintln(w, `[]`)
+			return
+		}
+		http.Error(w, "unexpected: "+r.URL.Path, http.StatusNotFound)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	entries, err := c.ListContents(context.Background(), "owner", "repo", ".")
+	if err != nil {
+		t.Fatalf("ListContents: %v", err)
+	}
+	if len(entries) != 0 {
+		t.Errorf("expected empty entries, got %d", len(entries))
+	}
+}
+
+func TestPostReview(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost || r.URL.Path != "/repos/owner/repo/pulls/10/reviews" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		var payload struct {
+			Body     string `json:"body"`
+			Event    string `json:"event"`
+			CommitID string `json:"commit_id"`
+		}
+		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+			http.Error(w, "bad body", http.StatusBadRequest)
+			return
+		}
+		// Verify APPROVED is normalized to APPROVE
+		if payload.Event != "APPROVE" {
+			http.Error(w, fmt.Sprintf("expected APPROVE, got %s", payload.Event), http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintf(w, `{"id":99,"body":%q,"user":{"login":"bot"},"state":"APPROVED","commit_id":%q}`, payload.Body, payload.CommitID)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	// Pass "APPROVED" (Gitea-style) — should be normalized to APPROVE
+	review, err := c.PostReview(context.Background(), "owner", "repo", 10, "APPROVED", "Looks good", "abc123", nil)
+	if err != nil {
+		t.Fatalf("PostReview: %v", err)
+	}
+	if review.ID != 99 {
+		t.Errorf("review.ID = %d, want 99", review.ID)
+	}
+	if review.User.Login != "bot" {
+		t.Errorf("review.User.Login = %q, want bot", review.User.Login)
+	}
+}
+
+func TestListReviews(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/pulls/7/reviews" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `[{"id":1,"body":"LGTM","user":{"login":"alice"},"state":"APPROVED","commit_id":"abc"}]`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	reviews, err := c.ListReviews(context.Background(), "owner", "repo", 7)
+	if err != nil {
+		t.Fatalf("ListReviews: %v", err)
+	}
+	if len(reviews) != 1 {
+		t.Fatalf("len(reviews) = %d, want 1", len(reviews))
+	}
+	if reviews[0].User.Login != "alice" {
+		t.Errorf("User.Login = %q, want alice", reviews[0].User.Login)
+	}
+}
+
+func TestGetAuthenticatedUser(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/user" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `{"login":"sonnet-review"}`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	login, err := c.GetAuthenticatedUser(context.Background())
+	if err != nil {
+		t.Fatalf("GetAuthenticatedUser: %v", err)
+	}
+	if login != "sonnet-review" {
+		t.Errorf("login = %q, want sonnet-review", login)
+	}
+}
+
+func TestResolveComment_NoOp(t *testing.T) {
+	// ResolveComment is a no-op on GitHub — should not make any HTTP call.
+	callCount := 0
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		callCount++
+		http.Error(w, "unexpected call", http.StatusInternalServerError)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	if err := c.ResolveComment(context.Background(), "owner", "repo", 123); err != nil {
+		t.Errorf("ResolveComment: %v (expected no-op)", err)
+	}
+	if callCount != 0 {
+		t.Errorf("expected no HTTP calls, got %d", callCount)
+	}
+}
+
+func TestGetTimelineReviewCommentIDForReview(t *testing.T) {
+	// Should return reviewID unchanged without making HTTP calls.
+	callCount := 0
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		callCount++
+		http.Error(w, "unexpected", http.StatusInternalServerError)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	got, err := c.GetTimelineReviewCommentIDForReview(context.Background(), "owner", "repo", 5, 42)
+	if err != nil {
+		t.Fatalf("GetTimelineReviewCommentIDForReview: %v", err)
+	}
+	if got != 42 {
+		t.Errorf("got %d, want 42", got)
+	}
+	if callCount != 0 {
+		t.Errorf("expected no HTTP calls, got %d", callCount)
+	}
+}
+
+func TestRequestReviewer(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost || r.URL.Path != "/repos/owner/repo/pulls/3/requested_reviewers" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		var payload struct {
+			Reviewers []string `json:"reviewers"`
+		}
+		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil || len(payload.Reviewers) == 0 {
+			http.Error(w, "bad body", http.StatusBadRequest)
+			return
+		}
+		if payload.Reviewers[0] != "bot-user" {
+			http.Error(w, fmt.Sprintf("unexpected reviewer %q", payload.Reviewers[0]), http.StatusBadRequest)
+			return
+		}
+		w.WriteHeader(http.StatusCreated)
+		fmt.Fprintln(w, `{}`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	if err := c.RequestReviewer(context.Background(), "owner", "repo", 3, "bot-user"); err != nil {
+		t.Errorf("RequestReviewer: %v", err)
+	}
+}
+
+func TestEditComment(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPatch || r.URL.Path != "/repos/owner/repo/pulls/comments/55" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		var payload struct {
+			Body string `json:"body"`
+		}
+		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+			http.Error(w, "bad body", http.StatusBadRequest)
+			return
+		}
+		if payload.Body != "updated body" {
+			http.Error(w, "wrong body", http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, `{"id":55,"body":"updated body"}`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	if err := c.EditComment(context.Background(), "owner", "repo", 55, "updated body"); err != nil {
+		t.Errorf("EditComment: %v", err)
+	}
+}
+
+func TestListReviewComments(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/repos/owner/repo/pulls/9/reviews/20/comments" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `[{"id":100,"path":"main.go","position":5,"body":"Needs fix"}]`)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	comments, err := c.ListReviewComments(context.Background(), "owner", "repo", 9, 20)
+	if err != nil {
+		t.Fatalf("ListReviewComments: %v", err)
+	}
+	if len(comments) != 1 {
+		t.Fatalf("len(comments) = %d, want 1", len(comments))
+	}
+	if comments[0].Path != "main.go" {
+		t.Errorf("Path = %q, want main.go", comments[0].Path)
+	}
+	if comments[0].Position != 5 {
+		t.Errorf("Position = %d, want 5", comments[0].Position)
+	}
+}
+
+func TestDeleteReview(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete || r.URL.Path != "/repos/owner/repo/pulls/7/reviews/11" {
+			http.Error(w, "unexpected", http.StatusNotFound)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	if err := c.DeleteReview(context.Background(), "owner", "repo", 7, 11); err != nil {
+		t.Errorf("DeleteReview: %v", err)
+	}
+}
+
+func TestGetAllFilesInPath(t *testing.T) {
+	content := "file content"
+	encoded := base64.StdEncoding.EncodeToString([]byte(content))
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/repos/owner/repo/contents/patterns":
+			w.Header().Set("Content-Type", "application/json")
+			fmt.Fprintln(w, `[{"name":"patterns.md","path":"patterns/patterns.md","type":"file"}]`)
+		case "/repos/owner/repo/contents/patterns/patterns.md":
+			w.Header().Set("Content-Type", "application/json")
+			resp := map[string]string{"content": encoded + "\n", "encoding": "base64"}
+			if err := json.NewEncoder(w).Encode(resp); err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+			}
+		default:
+			http.Error(w, "unexpected: "+r.URL.Path, http.StatusNotFound)
+		}
+	}))
+	defer srv.Close()
+
+	c := newTestClient(srv)
+	files, err := c.GetAllFilesInPath(context.Background(), "owner", "repo", "patterns")
+	if err != nil {
+		t.Fatalf("GetAllFilesInPath: %v", err)
+	}
+	if len(files) != 1 {
+		t.Fatalf("len(files) = %d, want 1", len(files))
+	}
+	if files["patterns/patterns.md"] != content {
+		t.Errorf("content = %q, want %q", files["patterns/patterns.md"], content)
+	}
+}
@@ -1,212 +0,0 @@
-package github
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"net/http"
-	"net/url"
-
-	"gitea.weiker.me/rodin/review-bot/vcs"
-)
-
-// ErrCannotDeleteSubmittedReview is returned when DeleteReview is called on
-// a review that has already been submitted (APPROVED, REQUEST_CHANGES, COMMENT).
-// GitHub only allows deletion of PENDING reviews. Callers that need to replace
-// a submitted review should use DismissReview instead.
-var ErrCannotDeleteSubmittedReview = errors.New("cannot delete submitted review: use DismissReview instead")
-
-// ErrConflictingCommitIDs is returned when PostReview receives comments with
-// differing non-empty CommitIDs. The GitHub API accepts only a single commit_id
-// per review submission; callers must ensure all comments target the same commit.
-var ErrConflictingCommitIDs = errors.New("comments contain conflicting commit IDs: all must target the same commit")
-
-// postReviewRequest is the GitHub API request body for creating a review.
-type postReviewRequest struct {
-	CommitID string               `json:"commit_id,omitempty"`
-	Body     string               `json:"body"`
-	Event    string               `json:"event"`
-	Comments []reviewCommentEntry `json:"comments,omitempty"`
-}
-
-// reviewCommentEntry is a single inline comment in a review creation request.
-type reviewCommentEntry struct {
-	Path     string `json:"path"`
-	Position int    `json:"position"`
-	Body     string `json:"body"`
-}
-
-// reviewResponse is the GitHub API response for a review.
-type reviewResponse struct {
-	ID       int64  `json:"id"`
-	Body     string `json:"body"`
-	State    string `json:"state"`
-	CommitID string `json:"commit_id"`
-	User     struct {
-		Login string `json:"login"`
-	} `json:"user"`
-}
-
-// dismissReviewRequest is the GitHub API request body for dismissing a review.
-type dismissReviewRequest struct {
-	Message string `json:"message"`
-	Event   string `json:"event"`
-}
-
-// translateGitHubReviewState translates a GitHub API review state to the
-// canonical vcs.Review.State value.
-func translateGitHubReviewState(state string) string {
-	switch state {
-	case "CHANGES_REQUESTED":
-		return "REQUEST_CHANGES"
-	case "COMMENTED":
-		return "COMMENT"
-	default:
-		// States like APPROVED, DISMISSED, and PENDING pass through unchanged
-		// as they already match the canonical vcs representation. PENDING appears
-		// on draft reviews that have not yet been submitted via the GitHub UI or API.
-		return state
-	}
-}
-
-// PostReview submits a review on a pull request.
-//
-// The vcs.ReviewEvent constants (ReviewEventApprove, ReviewEventRequestChanges,
-// ReviewEventComment) have string values that match GitHub's wire-format event
-// strings (APPROVE, REQUEST_CHANGES, COMMENT), so Event is cast directly to
-// string without translation.
-//
-// ReviewComment.Position maps directly to the GitHub API position field.
-// When req.Comments is empty, the payload omits the comments field entirely
-// (via the omitempty tag on postReviewRequest.Comments).
-//
-// The GitHub API accepts a single commit_id per review submission. PostReview
-// extracts it from the first comment with a non-empty CommitID. If any subsequent
-// comment specifies a different CommitID, PostReview returns ErrConflictingCommitIDs.
-// Comments with an empty CommitID are allowed and inherit the review-level value.
-func (c *Client) PostReview(ctx context.Context, owner, repo string, number int, req vcs.ReviewRequest) (*vcs.Review, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number)
-
-	payload := postReviewRequest{
-		Body:     req.Body,
-		Event:    string(req.Event),
-		CommitID: req.CommitID,
-	}
-
-	// Build the comments in one pass. Inline comment CommitIDs must match the
-	// review-level CommitID; reject if any disagree.
-	for _, comment := range req.Comments {
-		if comment.CommitID != "" {
-			if payload.CommitID == "" {
-				payload.CommitID = comment.CommitID
-			} else if payload.CommitID != comment.CommitID {
-				return nil, ErrConflictingCommitIDs
-			}
-		}
-		payload.Comments = append(payload.Comments, reviewCommentEntry{
-			Path:     comment.Path,
-			Position: comment.Position,
-			Body:     comment.Body,
-		})
-	}
-
-	data, err := json.Marshal(payload)
-	if err != nil {
-		return nil, fmt.Errorf("marshal review request: %w", err)
-	}
-
-	body, err := c.doRequestWithBody(ctx, http.MethodPost, reqURL, data)
-	if err != nil {
-		return nil, fmt.Errorf("post review: %w", err)
-	}
-
-	var resp reviewResponse
-	if err := json.Unmarshal(body, &resp); err != nil {
-		return nil, fmt.Errorf("parse review response: %w", err)
-	}
-
-	return &vcs.Review{
-		ID:       resp.ID,
-		Body:     resp.Body,
-		User:     vcs.UserInfo{Login: resp.User.Login},
-		State:    translateGitHubReviewState(resp.State),
-		CommitID: resp.CommitID,
-	}, nil
-}
-
-// ListReviews retrieves all reviews for a pull request.
-// GitHub review states are translated to canonical vcs values.
-func (c *Client) ListReviews(ctx context.Context, owner, repo string, number int) ([]vcs.Review, error) {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number)
-
-	body, err := c.doGet(ctx, reqURL)
-	if err != nil {
-		return nil, fmt.Errorf("list reviews: %w", err)
-	}
-
-	var responses []reviewResponse
-	if err := json.Unmarshal(body, &responses); err != nil {
-		return nil, fmt.Errorf("parse reviews response: %w", err)
-	}
-
-	reviews := make([]vcs.Review, len(responses))
-	for i, r := range responses {
-		reviews[i] = vcs.Review{
-			ID:       r.ID,
-			Body:     r.Body,
-			User:     vcs.UserInfo{Login: r.User.Login},
-			State:    translateGitHubReviewState(r.State),
-			CommitID: r.CommitID,
-		}
-	}
-	return reviews, nil
-}
-
-// DeleteReview deletes a pull request review.
-// Only PENDING reviews can be deleted; attempting to delete a submitted review
-// (APPROVED, CHANGES_REQUESTED, or COMMENTED per GitHub API naming) returns
-// ErrCannotDeleteSubmittedReview.
-func (c *Client) DeleteReview(ctx context.Context, owner, repo string, number int, reviewID int64) error {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews/%d",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number, reviewID)
-
-	// nil body: the GitHub DELETE endpoint for reviews requires no request body.
-	_, err := c.doRequestWithBody(ctx, http.MethodDelete, reqURL, nil)
-	if err != nil {
-		var apiErr *APIError
-		if errors.As(err, &apiErr) && apiErr.StatusCode == 422 {
-			return fmt.Errorf("delete review: %w", ErrCannotDeleteSubmittedReview)
-		}
-		return fmt.Errorf("delete review: %w", err)
-	}
-	return nil
-}
-
-// DismissReview dismisses a submitted review on a pull request.
-// This is the correct way to "remove" a submitted review (APPROVED, REQUEST_CHANGES).
-// GitHub does not allow deleting submitted reviews — they must be dismissed.
-func (c *Client) DismissReview(ctx context.Context, owner, repo string, number int, reviewID int64, message string) error {
-	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews/%d/dismissals",
-		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number, reviewID)
-
-	payload := dismissReviewRequest{
-		Message: message,
-		// Event is required by the GitHub API for dismissal requests, even though
-		// "DISMISS" is the only valid value for this endpoint.
-		Event: "DISMISS",
-	}
-
-	data, err := json.Marshal(payload)
-	if err != nil {
-		return fmt.Errorf("marshal dismiss request: %w", err)
-	}
-
-	_, err = c.doRequestWithBody(ctx, http.MethodPut, reqURL, data)
-	if err != nil {
-		return fmt.Errorf("dismiss review: %w", err)
-	}
-	return nil
-}
@@ -1,78 +0,0 @@
-// Package vcs defines shared types used across VCS client implementations
-// (gitea, github). Keeping them here prevents the client packages from
-// importing each other or duplicating definitions.
-package vcs
-
-// ReviewEvent is the verdict submitted with a pull request review.
-type ReviewEvent string
-
-const (
-	// ReviewEventApprove approves the pull request.
-	ReviewEventApprove ReviewEvent = "APPROVE"
-
-	// ReviewEventRequestChanges requests changes before the PR can be merged.
-	ReviewEventRequestChanges ReviewEvent = "REQUEST_CHANGES"
-
-	// ReviewEventComment leaves a comment review without explicit approval or rejection.
-	ReviewEventComment ReviewEvent = "COMMENT"
-)
-
-// UserInfo holds the identity of a user.
-type UserInfo struct {
-	Login string
-}
-
-// ReviewComment is a single inline comment attached to a pull request review.
-type ReviewComment struct {
-	// Path is the file path the comment applies to.
-	Path string
-
-	// Position is the line position within the diff (1-indexed).
-	// GitHub and Gitea differ in how they compute position; callers must
-	// supply the correct value for the target VCS.
-	Position int
-
-	// Body is the text content of the comment.
-	Body string
-
-	// CommitID is the SHA of the commit the comment applies to.
-	// For GitHub, all comments within a single review must target the same commit.
-	CommitID string
-}
-
-// ReviewRequest is the payload for submitting a pull request review.
-type ReviewRequest struct {
-	// Body is the top-level review comment body.
-	Body string
-
-	// Event is the review verdict.
-	Event ReviewEvent
-
-	// CommitID is the commit SHA that this review targets.
-	// When non-empty, the review is anchored to this commit.
-	// For GitHub, this is passed as commit_id in the review request.
-	// For Gitea, this is passed as the commitID parameter to PostReview.
-	CommitID string
-
-	// Comments are optional inline file-level comments.
-	Comments []ReviewComment
-}
-
-// Review represents a submitted pull request review.
-type Review struct {
-	// ID is the provider-assigned review identifier.
-	ID int64
-
-	// Body is the top-level review comment body.
-	Body string
-
-	// User is the author of the review.
-	User UserInfo
-
-	// State is the canonical review state string.
-	// Values: APPROVE, REQUEST_CHANGES, COMMENT, DISMISSED, PENDING.
-	State string
-
-	// CommitID is the commit SHA the review was evaluated against.
-	CommitID string
-}
Author	SHA1	Message	Date
Rodin	97bd120537	test(github): add tests for all exported methods in methods.go Tests cover: GetPullRequest, GetPullRequestDiff, GetPullRequestFiles, GetCommitStatuses, GetFileContent, GetFileContentRef, ListContents, ListContents(dot), PostReview (APPROVED→APPROVE normalization), ListReviews, GetAuthenticatedUser, RequestReviewer, EditComment, ListReviewComments, DeleteReview, GetAllFilesInPath, ResolveComment (no-op), GetTimelineReviewCommentIDForReview (pass-through).	2026-05-14 20:24:17 +00:00
Rodin	b6ba4e4636	feat(ci): add GitHub Actions workflow for strat/review-bot PRs Adds .github/workflows/review.yml to run AI code review on PRs using SAP AI Core. Three reviewers: sonnet, gpt, security (same as Gitea CI). Uses the .gitea/actions/review composite action which auto-detects GitHub vs Gitea runners via GITHUB_API_URL and uses GitHub REST API accordingly. Prerequisites: - Set required secrets on strat/review-bot (see comments in workflow) - Publish at least one release of review-bot on strat/review-bot with review-bot-linux-amd64 and checksums.txt assets Runs on ubuntu-24.04 (matching the runner label used by strat org).	2026-05-14 20:21:16 +00:00
Rodin	b531da1355	fix(github): clarify GetTimelineReviewCommentIDForReview supersede limitations The supersede path calls GetTimelineReviewCommentIDForReview then EditComment. On GitHub, EditComment targets /pulls/comments/{id} (for inline review comments), but review bodies are not inline comments. The PATCH will return 404 and be logged as a warning. The review itself posts correctly regardless. This is a known limitation pending a future fix via the reviews PATCH endpoint.	2026-05-14 20:21:12 +00:00
Rodin	06b09ce3b8	feat(cmd): wire VCS detection into main — route to github or gitea client - Replace gitea.NewClient() with newVCSClient(vcsType, vcsURL, token) - Replace newGiteaClientAdapter() with buildRepoPersonaClient() - Remove now-redundant giteaClientAdapter struct (moved to vcs.go) - Update fetchFileContext and fetchPatterns to accept vcsClient interface - Log detected VCS type at startup On Gitea runners: behaves identically to before (gitea.NewClient). On GitHub/GHES runners: uses githubAdapter backed by github.Client, all API calls use GitHub REST API v3 with GITHUB_API_URL as base URL.	2026-05-14 20:15:32 +00:00
Rodin	1e1a50581f	feat(cmd): add VCS client abstraction for GitHub and Gitea Adds vcs.go with: - vcsClient interface that main.go uses for all VCS operations - githubAdapter that wraps *github.Client and converts types to gitea types - newVCSClient() factory: detects VCS type via GITHUB_API_URL env var (set by GitHub Actions runners; absent on Gitea) and returns the appropriate client - buildRepoPersonaClient() adapter for LoadRepoPersonas - detectVCSType() and githubAPIBaseURL() helpers Detection logic mirrors action.yml: GITHUB_API_URL present → github, absent → gitea. On GitHub/GHES, uses GITHUB_API_URL as the API base URL (trusted platform value), never user-supplied vcsURL.	2026-05-14 20:15:25 +00:00
Rodin	545ab25bbc	feat(github): add high-level PR/review API methods to github client Adds GetPullRequest, GetPullRequestDiff, GetPullRequestFiles, GetCommitStatuses, GetFileContent, GetFileContentRef, ListContents, GetAllFilesInPath, PostReview, ListReviews, DeleteReview, GetAuthenticatedUser, RequestReviewer, EditComment, ListReviewComments, ResolveComment, and GetTimelineReviewCommentIDForReview. These mirror the gitea/ package methods but use GitHub REST API v3 paths (/repos/{owner}/{repo}/... instead of /api/v1/repos/...) and handle GitHub-specific behaviors: - File content is base64-encoded in the JSON response - Review event is APPROVE (not APPROVED) - ResolveComment is a no-op (GitHub has no REST API for this) - GetTimelineReviewCommentIDForReview returns the reviewID as-is	2026-05-14 20:15:17 +00:00