feat(issue): add get_discussion_markdown to issue_read

Adds a new issue_read method that fetches an issue and its comments and renders them as a single Markdown document, instead of a JSON array. Formatting logic lives in a pure, unit-tested helper (formatDiscussionMarkdown) covering comment rendering, empty comment lists, and attachment-inlined bodies. Existing get/get_comments/ get_labels methods are unchanged. Co-Authored-By: Codet <codet@commitgo.dev> (GPT-5-Codex)
2026-08-27 02:27:45 +00:00 · 2026-08-24 00:14:50 -07:00
10 changed files with 441 additions and 290 deletions
@@ -55,9 +55,9 @@ var (

 	IssueReadTool = tool.NewDefinition(
 		IssueReadToolName,
-		"Read issue: details, comments, or labels.",
+		"Read issue: details, comments, labels, or the full discussion as Markdown.",
 		annotation.ReadOnly("Read issue details"),
-		tool.String("method", tool.Required(), tool.Enum("get", "get_comments", "get_labels")),
+		tool.String("method", tool.Required(), tool.Enum("get", "get_comments", "get_labels", "get_discussion_markdown")),
 		tool.String("owner", tool.Required(), tool.Description(params.OwnerDesc)),
 		tool.String("repo", tool.Required(), tool.Description(params.RepoDesc)),
 		tool.Number("issue_number", tool.Required()),
@@ -112,6 +112,8 @@ func issueReadFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult,
 		return getIssueCommentsByIndexFn(ctx, args)
 	case "get_labels":
 		return getIssueLabelsFn(ctx, args)
+	case "get_discussion_markdown":
+		return getIssueDiscussionMarkdownFn(ctx, args)
 	default:
 		return to.ErrorResult(fmt.Errorf("unknown method: %s", method))
 	}
@@ -398,6 +400,54 @@ func getIssueCommentsByIndexFn(ctx context.Context, args map[string]any) (*mcp.C
 	return to.TextResult(out)
 }

+func getIssueDiscussionMarkdownFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	index, err := params.GetIndex(args, "issue_number")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+
+	var issue issueWithAssets
+	issuePath := fmt.Sprintf("repos/%s/%s/issues/%d", url.PathEscape(owner), url.PathEscape(repo), index)
+	if _, err := gitea.DoJSON(ctx, "GET", issuePath, nil, nil, &issue); err != nil {
+		return to.ErrorResult(fmt.Errorf("get %v/%v/issue/%v err: %v", owner, repo, index, err))
+	}
+
+	var comments []commentWithAssets
+	commentsPath := fmt.Sprintf("repos/%s/%s/issues/%d/comments", url.PathEscape(owner), url.PathEscape(repo), index)
+	if _, err := gitea.DoJSON(ctx, "GET", commentsPath, nil, nil, &comments); err != nil {
+		return to.ErrorResult(fmt.Errorf("get %v/%v/issues/%v/comments err: %v", owner, repo, index, err))
+	}
+
+	discComments := make([]discussionComment, 0, len(comments))
+	for i := range comments {
+		discComments = append(discComments, discussionComment{
+			Author:    slim.UserLogin(comments[i].Poster),
+			CreatedAt: comments[i].Created,
+			Body:      slim.BodyWithAttachments(comments[i].Body, comments[i].Assets),
+		})
+	}
+
+	md := formatDiscussionMarkdown(discussionIssue{
+		Number:    issue.Index,
+		Title:     issue.Title,
+		Author:    slim.UserLogin(issue.Poster),
+		State:     string(issue.State),
+		Labels:    slim.LabelNames(issue.Labels),
+		Body:      slim.BodyWithAttachments(issue.Body, issue.Assets),
+		CreatedAt: issue.Created,
+	}, discComments)
+
+	return to.RawTextResult(md)
+}
+
 func getIssueLabelsFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
 	owner, err := params.GetString(args, "owner")
 	if err != nil {
@@ -266,6 +266,119 @@ func Test_getIssueByIndexFn_includesAttachments(t *testing.T) {
 	}
 }

+func Test_getIssueDiscussionMarkdownFn(t *testing.T) {
+	const (
+		owner = "octo"
+		repo  = "demo"
+	)
+
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/api/v1/version":
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`{"version":"1.12.0"}`))
+		case fmt.Sprintf("/api/v1/repos/%s/%s/issues/42", owner, repo):
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`{
+				"number": 42,
+				"title": "bug with screenshot",
+				"body": "see attached",
+				"state": "open",
+				"user": {"login": "octocat"},
+				"labels": [{"name": "bug"}],
+				"created_at": "2026-01-02T15:04:05Z",
+				"assets": [
+					{"id": 1, "name": "shot.png", "size": 1024, "browser_download_url": "https://example/shot.png"}
+				]
+			}`))
+		case fmt.Sprintf("/api/v1/repos/%s/%s/issues/42/comments", owner, repo):
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`[
+				{"id": 1, "body": "see this", "user": {"login": "reviewer"}, "created_at": "2026-01-03T09:00:00Z", "assets": [
+					{"id": 9, "name": "log.txt", "size": 200, "browser_download_url": "https://example/log.txt"}
+				]}
+			]`))
+		default:
+			http.NotFound(w, r)
+		}
+	})
+	server := httptest.NewServer(handler)
+	defer server.Close()
+
+	origHost, origToken, origVersion := flag.Host, flag.Token, flag.Version
+	flag.Host, flag.Token, flag.Version = server.URL, "", "test"
+	defer func() { flag.Host, flag.Token, flag.Version = origHost, origToken, origVersion }()
+
+	args := map[string]any{
+		"owner": owner, "repo": repo, "issue_number": float64(42),
+	}
+	res, err := getIssueDiscussionMarkdownFn(context.Background(), args)
+	if err != nil {
+		t.Fatalf("getIssueDiscussionMarkdownFn() error = %v", err)
+	}
+	if res.IsError {
+		t.Fatalf("unexpected error result: %v", res.Content)
+	}
+	body := res.Content[0].(*mcp.TextContent).Text
+	for _, want := range []string{
+		"# bug with screenshot (#42)",
+		"**Author:** octocat",
+		"**State:** open",
+		"**Labels:** bug",
+		"[shot.png](https://example/shot.png)",
+		"### reviewer on 2026-01-03T09:00:00Z",
+		"[log.txt](https://example/log.txt)",
+	} {
+		if !strings.Contains(body, want) {
+			t.Fatalf("expected markdown to contain %q, got:\n%s", want, body)
+		}
+	}
+}
+
+func Test_getIssueDiscussionMarkdownFn_noComments(t *testing.T) {
+	const (
+		owner = "octo"
+		repo  = "demo"
+	)
+
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/api/v1/version":
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`{"version":"1.12.0"}`))
+		case fmt.Sprintf("/api/v1/repos/%s/%s/issues/7", owner, repo):
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`{"number": 7, "title": "quiet issue", "state": "open", "user": {"login": "octocat"}}`))
+		case fmt.Sprintf("/api/v1/repos/%s/%s/issues/7/comments", owner, repo):
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`[]`))
+		default:
+			http.NotFound(w, r)
+		}
+	})
+	server := httptest.NewServer(handler)
+	defer server.Close()
+
+	origHost, origToken, origVersion := flag.Host, flag.Token, flag.Version
+	flag.Host, flag.Token, flag.Version = server.URL, "", "test"
+	defer func() { flag.Host, flag.Token, flag.Version = origHost, origToken, origVersion }()
+
+	args := map[string]any{
+		"owner": owner, "repo": repo, "issue_number": float64(7),
+	}
+	res, err := getIssueDiscussionMarkdownFn(context.Background(), args)
+	if err != nil {
+		t.Fatalf("getIssueDiscussionMarkdownFn() error = %v", err)
+	}
+	if res.IsError {
+		t.Fatalf("unexpected error result: %v", res.Content)
+	}
+	body := res.Content[0].(*mcp.TextContent).Text
+	if !strings.Contains(body, "_No comments yet._") {
+		t.Fatalf("expected placeholder for no comments, got:\n%s", body)
+	}
+}
+
 func Test_getIssueCommentsByIndexFn_includesAttachments(t *testing.T) {
 	const (
 		owner = "octo"
@@ -0,0 +1,63 @@
+package issue
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+type discussionIssue struct {
+	Number    int64
+	Title     string
+	Author    string
+	State     string
+	Labels    []string
+	Body      string
+	CreatedAt time.Time
+}
+
+type discussionComment struct {
+	Author    string
+	CreatedAt time.Time
+	Body      string
+}
+
+// formatDiscussionMarkdown renders an issue and its comments as a single
+// Markdown document suitable for display without further parsing.
+func formatDiscussionMarkdown(issue discussionIssue, comments []discussionComment) string {
+	var b strings.Builder
+
+	fmt.Fprintf(&b, "# %s (#%d)\n\n", issue.Title, issue.Number)
+	fmt.Fprintf(&b, "**Author:** %s\n", issue.Author)
+	fmt.Fprintf(&b, "**State:** %s\n", issue.State)
+	if len(issue.Labels) > 0 {
+		fmt.Fprintf(&b, "**Labels:** %s\n", strings.Join(issue.Labels, ", "))
+	}
+	if !issue.CreatedAt.IsZero() {
+		fmt.Fprintf(&b, "**Created:** %s\n", issue.CreatedAt.UTC().Format(time.RFC3339))
+	}
+	b.WriteString("\n")
+	b.WriteString(strings.TrimSpace(issue.Body))
+	b.WriteString("\n\n---\n\n## Comments\n\n")
+
+	if len(comments) == 0 {
+		b.WriteString("_No comments yet._\n")
+		return b.String()
+	}
+
+	for i, c := range comments {
+		fmt.Fprintf(&b, "### %s", c.Author)
+		if !c.CreatedAt.IsZero() {
+			fmt.Fprintf(&b, " on %s", c.CreatedAt.UTC().Format(time.RFC3339))
+		}
+		b.WriteString("\n\n")
+		b.WriteString(strings.TrimSpace(c.Body))
+		if i < len(comments)-1 {
+			b.WriteString("\n\n---\n\n")
+		} else {
+			b.WriteString("\n")
+		}
+	}
+
+	return b.String()
+}
@@ -0,0 +1,85 @@
+package issue
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+func Test_formatDiscussionMarkdown_includesIssueAndComments(t *testing.T) {
+	created := time.Date(2026, 1, 2, 15, 4, 5, 0, time.UTC)
+	commentTime := time.Date(2026, 1, 3, 9, 0, 0, 0, time.UTC)
+	md := formatDiscussionMarkdown(
+		discussionIssue{
+			Number:    42,
+			Title:     "bug with screenshot",
+			Author:    "octocat",
+			State:     "open",
+			Labels:    []string{"bug", "help wanted"},
+			Body:      "see attached",
+			CreatedAt: created,
+		},
+		[]discussionComment{
+			{Author: "reviewer", CreatedAt: commentTime, Body: "thanks for reporting"},
+		},
+	)
+
+	wantSubstrings := []string{
+		"# bug with screenshot (#42)",
+		"**Author:** octocat",
+		"**State:** open",
+		"**Labels:** bug, help wanted",
+		"**Created:** 2026-01-02T15:04:05Z",
+		"see attached",
+		"## Comments",
+		"### reviewer",
+		"2026-01-03T09:00:00Z",
+		"thanks for reporting",
+	}
+	for _, want := range wantSubstrings {
+		if !strings.Contains(md, want) {
+			t.Fatalf("expected markdown to contain %q, got:\n%s", want, md)
+		}
+	}
+}
+
+func Test_formatDiscussionMarkdown_noComments(t *testing.T) {
+	md := formatDiscussionMarkdown(
+		discussionIssue{
+			Number: 1,
+			Title:  "no comments yet",
+			Author: "octocat",
+			State:  "open",
+		},
+		nil,
+	)
+
+	if !strings.Contains(md, "## Comments") {
+		t.Fatalf("expected a Comments section, got:\n%s", md)
+	}
+	if !strings.Contains(md, "_No comments yet._") {
+		t.Fatalf("expected placeholder for no comments, got:\n%s", md)
+	}
+}
+
+func Test_formatDiscussionMarkdown_attachmentBodyIsInlined(t *testing.T) {
+	md := formatDiscussionMarkdown(
+		discussionIssue{
+			Number: 7,
+			Title:  "with attachment",
+			Author: "octocat",
+			State:  "open",
+			Body:   "see attached\n\n[shot.png](https://example/shot.png)",
+		},
+		[]discussionComment{
+			{Author: "reviewer", Body: "log attached\n\n[log.txt](https://example/log.txt)"},
+		},
+	)
+
+	if !strings.Contains(md, "[shot.png](https://example/shot.png)") {
+		t.Fatalf("expected issue attachment link in markdown, got:\n%s", md)
+	}
+	if !strings.Contains(md, "[log.txt](https://example/log.txt)") {
+		t.Fatalf("expected comment attachment link in markdown, got:\n%s", md)
+	}
+}
@@ -69,26 +69,28 @@ func init() {
 	})
 }

-type createBranchArgs struct {
-	Owner     string `json:"owner" required:"true"`
-	Repo      string `json:"repo" required:"true"`
-	Branch    string `json:"branch" required:"true"`
-	OldBranch string `json:"old_branch"`
-}
-
 func CreateBranchFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in createBranchArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	branch, err := params.GetString(args, "branch")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	oldBranch, _ := args["old_branch"].(string)

 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, _, err = client.Repositories.CreateBranch(ctx, in.Owner, in.Repo, gitea_sdk.CreateBranchOption{
-		BranchName:    in.Branch,
-		OldBranchName: in.OldBranch,
+	_, _, err = client.Repositories.CreateBranch(ctx, owner, repo, gitea_sdk.CreateBranchOption{
+		BranchName:    branch,
+		OldBranchName: oldBranch,
 	})
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("create branch error: %v", err))
@@ -97,22 +99,24 @@ func CreateBranchFn(ctx context.Context, args map[string]any) (*mcp.CallToolResu
 	return to.TextResult("Branch Created")
 }

-type deleteBranchArgs struct {
-	Owner  string `json:"owner" required:"true"`
-	Repo   string `json:"repo" required:"true"`
-	Branch string `json:"branch" required:"true"`
-}
-
 func DeleteBranchFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in deleteBranchArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	branch, err := params.GetString(args, "branch")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, _, err = client.Repositories.DeleteRepoBranch(ctx, in.Owner, in.Repo, in.Branch)
+	_, _, err = client.Repositories.DeleteRepoBranch(ctx, owner, repo, branch)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("delete branch error: %v", err))
 	}
@@ -120,14 +124,13 @@ func DeleteBranchFn(ctx context.Context, args map[string]any) (*mcp.CallToolResu
 	return to.TextResult("Branch Deleted")
 }

-type listBranchesArgs struct {
-	Owner string `json:"owner" required:"true"`
-	Repo  string `json:"repo" required:"true"`
-}
-
 func ListBranchesFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in listBranchesArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
 	page, pageSize := params.GetPagination(args, 30)
@@ -141,7 +144,7 @@ func ListBranchesFn(ctx context.Context, args map[string]any) (*mcp.CallToolResu
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	branches, _, err := client.Repositories.ListRepoBranches(ctx, in.Owner, in.Repo, opt)
+	branches, _, err := client.Repositories.ListRepoBranches(ctx, owner, repo, opt)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("list branches error: %v", err))
 	}
@@ -102,28 +102,30 @@ type ContentLine struct {
 	Content    string `json:"content"`
 }

-type getFileContentArgs struct {
-	Owner     string `json:"owner" required:"true"`
-	Repo      string `json:"repo" required:"true"`
-	Ref       string `json:"ref"`
-	Path      string `json:"path" required:"true"`
-	WithLines bool   `json:"withLines"`
-}
-
 func GetFileContentFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in getFileContentArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	ref, _ := args["ref"].(string)
+	filePath, err := params.GetString(args, "path")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	content, _, err := client.Repositories.GetContents(ctx, in.Owner, in.Repo, in.Ref, in.Path)
+	content, _, err := client.Repositories.GetContents(ctx, owner, repo, ref, filePath)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get file err: %v", err))
 	}
-	if in.WithLines {
+	withLines, _ := args["withLines"].(bool)
+	if withLines {
 		rawContent, err := base64.StdEncoding.DecodeString(*content.Content)
 		if err != nil {
 			return to.ErrorResult(fmt.Errorf("decode base64 content err: %v", err))
@@ -162,45 +164,49 @@ func GetFileContentFn(ctx context.Context, args map[string]any) (*mcp.CallToolRe
 	return to.TextResult(slimContents(content))
 }

-type getDirContentArgs struct {
-	Owner string `json:"owner" required:"true"`
-	Repo  string `json:"repo" required:"true"`
-	Ref   string `json:"ref"`
-	Path  string `json:"path" required:"true"`
-}
-
 func GetDirContentFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in getDirContentArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	ref, _ := args["ref"].(string)
+	filePath, err := params.GetString(args, "path")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	content, _, err := client.Repositories.ListContents(ctx, in.Owner, in.Repo, in.Ref, in.Path)
+	content, _, err := client.Repositories.ListContents(ctx, owner, repo, ref, filePath)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get dir content err: %v", err))
 	}
 	return to.TextResult(slimDirEntries(content))
 }

-type createOrUpdateFileArgs struct {
-	Owner         string `json:"owner" required:"true"`
-	Repo          string `json:"repo" required:"true"`
-	Path          string `json:"path" required:"true"`
-	Content       string `json:"content"`
-	Message       string `json:"message"`
-	BranchName    string `json:"branch_name"`
-	NewBranchName string `json:"new_branch_name"`
-	SHA           string `json:"sha"`
-}
-
 func CreateOrUpdateFileFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in createOrUpdateFileArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	filePath, err := params.GetString(args, "path")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	content, _ := args["content"].(string)
+	message, _ := args["message"].(string)
+	branchName, _ := args["branch_name"].(string)
+	newBranchName, _ := args["new_branch_name"].(string)
+	sha, _ := args["sha"].(string)

 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
@@ -208,20 +214,20 @@ func CreateOrUpdateFileFn(ctx context.Context, args map[string]any) (*mcp.CallTo
 	}

 	fileOpt := gitea_sdk.FileOptions{
-		Message:       in.Message,
-		BranchName:    in.BranchName,
-		NewBranchName: in.NewBranchName,
+		Message:       message,
+		BranchName:    branchName,
+		NewBranchName: newBranchName,
 	}
-	targetBranch := cmp.Or(in.NewBranchName, in.BranchName)
+	targetBranch := cmp.Or(newBranchName, branchName)

-	if in.SHA != "" {
+	if sha != "" {
 		// Update existing file
 		opt := gitea_sdk.UpdateFileOptions{
-			SHA:         in.SHA,
-			Content:     base64.StdEncoding.EncodeToString([]byte(in.Content)),
+			SHA:         sha,
+			Content:     base64.StdEncoding.EncodeToString([]byte(content)),
 			FileOptions: fileOpt,
 		}
-		_, _, err = client.Repositories.UpdateFile(ctx, in.Owner, in.Repo, in.Path, opt)
+		_, _, err = client.Repositories.UpdateFile(ctx, owner, repo, filePath, opt)
 		if err != nil {
 			return to.ErrorResult(fmt.Errorf("update file err: %v", err))
 		}
@@ -230,42 +236,47 @@ func CreateOrUpdateFileFn(ctx context.Context, args map[string]any) (*mcp.CallTo

 	// Create new file
 	opt := gitea_sdk.CreateFileOptions{
-		Content:     base64.StdEncoding.EncodeToString([]byte(in.Content)),
+		Content:     base64.StdEncoding.EncodeToString([]byte(content)),
 		FileOptions: fileOpt,
 	}
-	_, _, err = client.Repositories.CreateFile(ctx, in.Owner, in.Repo, in.Path, opt)
+	_, _, err = client.Repositories.CreateFile(ctx, owner, repo, filePath, opt)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("create file err: %v", err))
 	}
 	return to.TextResult("Create file success on branch " + targetBranch)
 }

-type deleteFileArgs struct {
-	Owner      string `json:"owner" required:"true"`
-	Repo       string `json:"repo" required:"true"`
-	Path       string `json:"path" required:"true"`
-	Message    string `json:"message"`
-	BranchName string `json:"branch_name"`
-	SHA        string `json:"sha" required:"true"`
-}
-
 func DeleteFileFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in deleteFileArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	filePath, err := params.GetString(args, "path")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	message, _ := args["message"].(string)
+	branchName, _ := args["branch_name"].(string)
+	sha, err := params.GetString(args, "sha")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
 	opt := gitea_sdk.DeleteFileOptions{
 		FileOptions: gitea_sdk.FileOptions{
-			Message:    in.Message,
-			BranchName: in.BranchName,
+			Message:    message,
+			BranchName: branchName,
 		},
-		SHA: in.SHA,
+		SHA: sha,
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	_, err = client.Repositories.DeleteFile(ctx, in.Owner, in.Repo, in.Path, opt)
+	_, err = client.Repositories.DeleteFile(ctx, owner, repo, filePath, opt)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("delete file err: %v", err))
 	}
@@ -37,18 +37,20 @@ func init() {
 	})
 }

-type getRepoTreeArgs struct {
-	Owner     string `json:"owner" required:"true"`
-	Repo      string `json:"repo" required:"true"`
-	TreeSHA   string `json:"tree_sha" required:"true"`
-	Recursive bool   `json:"recursive"`
-}
-
 func GetRepoTreeFn(ctx context.Context, args map[string]any) (*mcp.CallToolResult, error) {
-	var in getRepoTreeArgs
-	if err := params.Bind(args, &in); err != nil {
+	owner, err := params.GetString(args, "owner")
+	if err != nil {
 		return to.ErrorResult(err)
 	}
+	repo, err := params.GetString(args, "repo")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	treeSHA, err := params.GetString(args, "tree_sha")
+	if err != nil {
+		return to.ErrorResult(err)
+	}
+	recursive, _ := args["recursive"].(bool)
 	page, pageSize := params.GetPagination(args, 30)

 	opt := gitea_sdk.ListTreeOptions{
@@ -56,14 +58,14 @@ func GetRepoTreeFn(ctx context.Context, args map[string]any) (*mcp.CallToolResul
 			Page:     page,
 			PageSize: pageSize,
 		},
-		Ref:       in.TreeSHA,
-		Recursive: in.Recursive,
+		Ref:       treeSHA,
+		Recursive: recursive,
 	}
 	client, err := gitea.ClientFromContext(ctx)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get gitea client err: %v", err))
 	}
-	tree, _, err := client.Git.GetTrees(ctx, in.Owner, in.Repo, opt)
+	tree, _, err := client.Git.GetTrees(ctx, owner, repo, opt)
 	if err != nil {
 		return to.ErrorResult(fmt.Errorf("get repository tree err: %v", err))
 	}
@@ -1,55 +0,0 @@
-package params
-
-import (
-	"encoding/json"
-	"fmt"
-	"reflect"
-	"strings"
-)
-
-// Bind decodes args into out, a pointer to a struct, replacing the repeated
-// args["x"].(string)/!ok extraction pattern. It round-trips args through JSON
-// so JSON numbers land in the correct Go numeric field types.
-//
-// Struct fields tagged `required:"true"` must be present in args; a missing
-// key, or an empty string value for a string field, returns an error naming
-// the field's json tag.
-func Bind(args map[string]any, out any) error {
-	v := reflect.ValueOf(out)
-	if v.Kind() != reflect.Pointer || v.Elem().Kind() != reflect.Struct {
-		return fmt.Errorf("params.Bind: out must be a pointer to a struct, got %T", out)
-	}
-
-	if err := checkRequiredFields(args, v.Elem().Type()); err != nil {
-		return err
-	}
-
-	data, err := json.Marshal(args)
-	if err != nil {
-		return fmt.Errorf("params.Bind: marshal args: %w", err)
-	}
-	if err := json.Unmarshal(data, out); err != nil {
-		return fmt.Errorf("params.Bind: %w", err)
-	}
-	return nil
-}
-
-func checkRequiredFields(args map[string]any, t reflect.Type) error {
-	for field := range t.Fields() {
-		if field.Tag.Get("required") != "true" {
-			continue
-		}
-		name, _, _ := strings.Cut(field.Tag.Get("json"), ",")
-		if name == "" || name == "-" {
-			continue
-		}
-		val, ok := args[name]
-		if !ok {
-			return fmt.Errorf("%s is required", name)
-		}
-		if s, isString := val.(string); isString && s == "" {
-			return fmt.Errorf("%s is required", name)
-		}
-	}
-	return nil
-}
@@ -1,132 +0,0 @@
-package params
-
-import (
-	"strings"
-	"testing"
-)
-
-func TestBind_RequiredFieldsPresent(t *testing.T) {
-	type args struct {
-		Owner string `json:"owner" required:"true"`
-		Repo  string `json:"repo" required:"true"`
-	}
-	var out args
-	err := Bind(map[string]any{"owner": "gitea", "repo": "gitea-mcp"}, &out)
-	if err != nil {
-		t.Fatalf("Bind() unexpected error = %v", err)
-	}
-	if out.Owner != "gitea" || out.Repo != "gitea-mcp" {
-		t.Errorf("Bind() = %+v, want Owner=gitea Repo=gitea-mcp", out)
-	}
-}
-
-func TestBind_RequiredFieldMissing(t *testing.T) {
-	type args struct {
-		Owner string `json:"owner" required:"true"`
-	}
-	var out args
-	err := Bind(map[string]any{}, &out)
-	if err == nil {
-		t.Fatal("Bind() expected error, got nil")
-	}
-	if !strings.Contains(err.Error(), "owner") {
-		t.Errorf("Bind() error = %v, want mentioning %q", err, "owner")
-	}
-}
-
-func TestBind_RequiredStringFieldEmpty(t *testing.T) {
-	type args struct {
-		Owner string `json:"owner" required:"true"`
-	}
-	var out args
-	err := Bind(map[string]any{"owner": ""}, &out)
-	if err == nil {
-		t.Fatal("Bind() expected error for empty required string, got nil")
-	}
-}
-
-func TestBind_OptionalFieldDefaultsToZeroValue(t *testing.T) {
-	type args struct {
-		Owner     string `json:"owner" required:"true"`
-		OldBranch string `json:"old_branch"`
-	}
-	var out args
-	err := Bind(map[string]any{"owner": "gitea"}, &out)
-	if err != nil {
-		t.Fatalf("Bind() unexpected error = %v", err)
-	}
-	if out.OldBranch != "" {
-		t.Errorf("Bind() OldBranch = %q, want empty", out.OldBranch)
-	}
-}
-
-func TestBind_NumericConversion(t *testing.T) {
-	type args struct {
-		Page    int   `json:"page"`
-		PerPage int64 `json:"per_page"`
-	}
-	var out args
-	err := Bind(map[string]any{"page": float64(2), "per_page": float64(40)}, &out)
-	if err != nil {
-		t.Fatalf("Bind() unexpected error = %v", err)
-	}
-	if out.Page != 2 || out.PerPage != 40 {
-		t.Errorf("Bind() = %+v, want Page=2 PerPage=40", out)
-	}
-}
-
-func TestBind_Boolean(t *testing.T) {
-	type args struct {
-		Recursive bool `json:"recursive"`
-	}
-	var out args
-	err := Bind(map[string]any{"recursive": true}, &out)
-	if err != nil {
-		t.Fatalf("Bind() unexpected error = %v", err)
-	}
-	if !out.Recursive {
-		t.Errorf("Bind() Recursive = false, want true")
-	}
-}
-
-func TestBind_Array(t *testing.T) {
-	type args struct {
-		Labels []string `json:"labels"`
-		IDs    []int64  `json:"ids"`
-	}
-	var out args
-	err := Bind(map[string]any{
-		"labels": []any{"bug", "help wanted"},
-		"ids":    []any{float64(1), float64(2)},
-	}, &out)
-	if err != nil {
-		t.Fatalf("Bind() unexpected error = %v", err)
-	}
-	if len(out.Labels) != 2 || out.Labels[0] != "bug" || out.Labels[1] != "help wanted" {
-		t.Errorf("Bind() Labels = %v, want [bug help wanted]", out.Labels)
-	}
-	if len(out.IDs) != 2 || out.IDs[0] != 1 || out.IDs[1] != 2 {
-		t.Errorf("Bind() IDs = %v, want [1 2]", out.IDs)
-	}
-}
-
-func TestBind_InvalidFieldType(t *testing.T) {
-	type args struct {
-		Page int `json:"page"`
-	}
-	var out args
-	err := Bind(map[string]any{"page": "not-a-number"}, &out)
-	if err == nil {
-		t.Fatal("Bind() expected error for invalid numeric field, got nil")
-	}
-}
-
-func TestBind_NonPointerRejected(t *testing.T) {
-	type args struct {
-		Owner string `json:"owner"`
-	}
-	err := Bind(map[string]any{}, args{})
-	if err == nil {
-		t.Fatal("Bind() expected error for non-pointer out, got nil")
-	}
-}
@@ -23,6 +23,17 @@ func TextResult(v any) (*mcp.CallToolResult, error) {
 	}, nil
 }

+// RawTextResult returns text as-is, without JSON-encoding it. Use it for
+// content that is already meant to be read directly, such as Markdown.
+func RawTextResult(text string) (*mcp.CallToolResult, error) {
+	if flag.Debug {
+		log.Debugf("Text Result: %s", text)
+	}
+	return &mcp.CallToolResult{
+		Content: []mcp.Content{&mcp.TextContent{Text: text}},
+	}, nil
+}
+
 func ErrorResult(err error) (*mcp.CallToolResult, error) {
 	log.Errorf("%s", err.Error())
 	var result mcp.CallToolResult