diff --git a/shortcuts/drive/drive_add_comment.go b/shortcuts/drive/drive_add_comment.go
index 41899054d..b40ca959d 100644
--- a/shortcuts/drive/drive_add_comment.go
+++ b/shortcuts/drive/drive_add_comment.go
@@ -47,6 +47,34 @@ const defaultLocateDocLimit = 10
 // with `drive file.comments create_v2` against a fresh docx.
 const maxCommentTotalRunes = 10000
 
+// The file comment API treats supported Drive file comments as full-file
+// comments in the UI, but currently rejects an empty anchor.block_id for file
+// targets. TODO: remove this placeholder after the API accepts omitting
+// anchor.block_id for file full comments.
+const fileFullCommentAnchorBlockID = "test"
+
+// File comments are enabled only for extensions verified to render correctly in
+// the Lark file preview comment UI. Keep this list conservative: PDF, docx, and
+// xlsx currently accept the API request but display poorly in the page.
+var supportedFileCommentExtensions = []string{
+	".md",
+	".txt",
+	".json",
+	".csv",
+	".go",
+	".js",
+	".py",
+	".pptx",
+	".png",
+	".jpg",
+	".jpeg",
+	".zip",
+	".mp3",
+	".mp4",
+}
+
+var supportedFileCommentExtensionSet = newSupportedFileCommentExtensionSet(supportedFileCommentExtensions)
+
 type commentDocRef struct {
 	Kind  string
 	Token string
@@ -93,17 +121,18 @@ const (
 var DriveAddComment = common.Shortcut{
 	Service:     "drive",
 	Command:     "+add-comment",
-	Description: "Add a comment to doc/docx/sheet/slides, also supports wiki URL resolving to doc/docx/sheet/slides",
+	Description: "Add a comment to doc/docx/file/sheet/slides; file targets support selected extensions and full comments only",
 	Risk:        "write",
 	Scopes: []string{
+		"drive:drive.metadata:readonly",
 		"docx:document:readonly",
 		"docs:document.comment:create",
 		"docs:document.comment:write_only",
 	},
 	AuthTypes: []string{"user", "bot"},
 	Flags: []common.Flag{
-		{Name: "doc", Desc: "document URL/token, sheet/slides URL, or wiki URL that resolves to doc/docx/sheet/slides", Required: true},
-		{Name: "type", Desc: "document type: doc, docx, sheet, slides (required when --doc is a bare token; auto-detected for URLs)", Enum: []string{"doc", "docx", "sheet", "slides"}},
+		{Name: "doc", Desc: "document URL/token, file URL/token, sheet/slides URL, or wiki URL that resolves to doc/docx/file/sheet/slides", Required: true},
+		{Name: "type", Desc: "document type: doc, docx, file, sheet, slides (required when --doc is a bare token; auto-detected for URLs)", Enum: []string{"doc", "docx", "file", "sheet", "slides"}},
 		{Name: "content", Desc: "reply_elements JSON string", Required: true},
 		{Name: "full-comment", Type: "bool", Desc: "create a full-document comment; also the default when no location is provided"},
 		{Name: "selection-with-ellipsis", Desc: "target content locator (plain text or 'start...end')"},
@@ -145,7 +174,6 @@ var DriveAddComment = common.Shortcut{
 			}
 			return nil
 		}
-
 		selection := runtime.Str("selection-with-ellipsis")
 		blockID := strings.TrimSpace(runtime.Str("block-id"))
 		if strings.TrimSpace(selection) != "" && blockID != "" {
@@ -156,6 +184,9 @@ var DriveAddComment = common.Shortcut{
 		}
 
 		mode := resolveCommentMode(runtime.Bool("full-comment"), selection, blockID)
+		if docRef.Kind == "file" {
+			return validateFileCommentMode(mode, "")
+		}
 		if mode == commentModeLocal && docRef.Kind == "doc" {
 			return output.ErrValidation("local comments only support docx, sheet, and slides; old doc format only supports full comments")
 		}
@@ -217,6 +248,33 @@ var DriveAddComment = common.Shortcut{
 				Body(commentBody).
 				Set("file_token", resolvedToken)
 		}
+		if resolvedKind == "file" {
+			commentBody := buildCommentCreateV2Request("file", "", "", replyElements, nil)
+			desc := "2-step orchestration: verify supported file metadata -> create file comment"
+			verifyStep := "[1]"
+			createStep := "[2]"
+			if isWiki {
+				desc = "3-step orchestration: resolve wiki -> verify supported file metadata -> create file comment"
+				verifyStep = "[2]"
+				createStep = "[3]"
+			}
+			return common.NewDryRunAPI().
+				Desc(desc).
+				POST("/open-apis/drive/v1/metas/batch_query").
+				Desc(verifyStep+" Read file metadata and verify the title extension is supported").
+				Body(map[string]interface{}{
+					"request_docs": []map[string]interface{}{
+						{
+							"doc_token": resolvedToken,
+							"doc_type":  "file",
+						},
+					},
+				}).
+				POST("/open-apis/drive/v1/files/:file_token/new_comments").
+				Desc(createStep+" Create file full comment").
+				Body(commentBody).
+				Set("file_token", resolvedToken)
+		}
 
 		// Doc/docx comment dry-run.
 		createPath := "/open-apis/drive/v1/files/:file_token/new_comments"
@@ -317,6 +375,9 @@ var DriveAddComment = common.Shortcut{
 		if target.FileType == "slides" {
 			return executeSlidesComment(runtime, commentDocRef{Kind: "slides", Token: target.FileToken})
 		}
+		if target.FileType == "file" {
+			return executeFileComment(runtime, target)
+		}
 
 		replyElements, err := parseCommentReplyElements(runtime.Str("content"))
 		if err != nil {
@@ -421,6 +482,9 @@ func parseCommentDocRef(input, docType string) (commentDocRef, error) {
 	if token, ok := extractURLToken(raw, "/sheets/"); ok {
 		return commentDocRef{Kind: "sheet", Token: token}, nil
 	}
+	if token, ok := extractURLToken(raw, "/file/"); ok {
+		return commentDocRef{Kind: "file", Token: token}, nil
+	}
 	if token, ok := extractURLToken(raw, "/slides/"); ok {
 		return commentDocRef{Kind: "slides", Token: token}, nil
 	}
@@ -431,7 +495,7 @@ func parseCommentDocRef(input, docType string) (commentDocRef, error) {
 		return commentDocRef{Kind: "doc", Token: token}, nil
 	}
 	if strings.Contains(raw, "://") {
-		return commentDocRef{}, output.ErrValidation("unsupported --doc input %q: use a doc/docx/sheet/slides URL, a token with --type, or a wiki URL that resolves to doc/docx/sheet/slides", raw)
+		return commentDocRef{}, output.ErrValidation("unsupported --doc input %q: use a doc/docx/file/sheet/slides URL, a token with --type, or a wiki URL that resolves to doc/docx/file/sheet/slides", raw)
 	}
 	if strings.ContainsAny(raw, "/?#") {
 		return commentDocRef{}, output.ErrValidation("unsupported --doc input %q: use a token with --type, or a wiki URL", raw)
@@ -440,7 +504,7 @@ func parseCommentDocRef(input, docType string) (commentDocRef, error) {
 	// Bare token: --type is required.
 	docType = strings.TrimSpace(docType)
 	if docType == "" {
-		return commentDocRef{}, output.ErrValidation("--type is required when --doc is a bare token (allowed values: doc, docx, sheet, slides)")
+		return commentDocRef{}, output.ErrValidation("--type is required when --doc is a bare token (allowed values: doc, docx, file, sheet, slides)")
 	}
 	return commentDocRef{Kind: docType, Token: raw}, nil
 }
@@ -451,9 +515,16 @@ func resolveCommentTarget(ctx context.Context, runtime *common.RuntimeContext, i
 		return resolvedCommentTarget{}, err
 	}
 
-	if docRef.Kind == "docx" || docRef.Kind == "doc" || docRef.Kind == "sheet" || docRef.Kind == "slides" {
-		if mode == commentModeLocal && docRef.Kind != "docx" && docRef.Kind != "sheet" && docRef.Kind != "slides" {
-			return resolvedCommentTarget{}, output.ErrValidation("local comments only support docx, sheet, and slides; old doc format only supports full comments")
+	if docRef.Kind == "docx" || docRef.Kind == "doc" || docRef.Kind == "file" || docRef.Kind == "sheet" || docRef.Kind == "slides" {
+		if mode == commentModeLocal {
+			switch docRef.Kind {
+			case "doc":
+				return resolvedCommentTarget{}, output.ErrValidation("local comments only support docx, sheet, and slides; old doc format only supports full comments")
+			case "file":
+				if err := validateFileCommentMode(mode, ""); err != nil {
+					return resolvedCommentTarget{}, err
+				}
+			}
 		}
 		return resolvedCommentTarget{
 			DocID:      docRef.Token,
@@ -507,11 +578,24 @@ func resolveCommentTarget(ctx context.Context, runtime *common.RuntimeContext, i
 			WikiToken:  docRef.Token,
 		}, nil
 	}
+	if objType == "file" {
+		if err := validateFileCommentMode(mode, objType); err != nil {
+			return resolvedCommentTarget{}, err
+		}
+		fmt.Fprintf(runtime.IO().ErrOut, "Resolved wiki to %s: %s\n", objType, common.MaskToken(objToken))
+		return resolvedCommentTarget{
+			DocID:      objToken,
+			FileToken:  objToken,
+			FileType:   "file",
+			ResolvedBy: "wiki",
+			WikiToken:  docRef.Token,
+		}, nil
+	}
 	if mode == commentModeLocal && objType != "docx" {
 		return resolvedCommentTarget{}, output.ErrValidation("wiki resolved to %q, but local comments only support docx, sheet, and slides; for sheet use --block-id <sheetId>!<cell>, for slides use --block-id <slide-block-type>!<xml-id>", objType)
 	}
 	if mode == commentModeFull && objType != "docx" && objType != "doc" {
-		return resolvedCommentTarget{}, output.ErrValidation("wiki resolved to %q, but comments only support doc/docx/sheet/slides", objType)
+		return resolvedCommentTarget{}, output.ErrValidation("wiki resolved to %q, but comments only support doc/docx/file/sheet/slides", objType)
 	}
 
 	fmt.Fprintf(runtime.IO().ErrOut, "Resolved wiki to %s: %s\n", objType, common.MaskToken(objToken))
@@ -718,6 +802,10 @@ func buildCommentCreateV2Request(fileType, blockID, slideBlockType string, reply
 			"sheet_col": sheet.Col,
 			"sheet_row": sheet.Row,
 		}
+	} else if fileType == "file" {
+		body["anchor"] = map[string]interface{}{
+			"block_id": fileFullCommentAnchorBlockID,
+		}
 	} else if strings.TrimSpace(blockID) != "" {
 		body["anchor"] = map[string]interface{}{
 			"block_id": blockID,
@@ -809,6 +897,107 @@ func parseSheetCellRef(input string) (*sheetAnchor, error) {
 	return &sheetAnchor{SheetID: sheetID, Col: col, Row: row}, nil
 }
 
+func fetchCommentTargetFileTitle(runtime *common.RuntimeContext, fileToken string) (string, error) {
+	data, err := runtime.CallAPI(
+		"POST",
+		"/open-apis/drive/v1/metas/batch_query",
+		nil,
+		map[string]interface{}{
+			"request_docs": []map[string]interface{}{
+				{
+					"doc_token": fileToken,
+					"doc_type":  "file",
+				},
+			},
+		},
+	)
+	if err != nil {
+		return "", err
+	}
+
+	metas := common.GetSlice(data, "metas")
+	if len(metas) == 0 {
+		return "", output.Errorf(output.ExitAPI, "api_error", "drive metas.batch_query returned no metadata for file %s", common.MaskToken(fileToken))
+	}
+	meta, ok := metas[0].(map[string]interface{})
+	if !ok {
+		return "", output.Errorf(output.ExitAPI, "api_error", "drive metas.batch_query returned unexpected metadata format for file %s", common.MaskToken(fileToken))
+	}
+	return common.GetString(meta, "title"), nil
+}
+
+func ensureSupportedFileCommentTarget(runtime *common.RuntimeContext, fileToken string) (string, string, error) {
+	title, err := fetchCommentTargetFileTitle(runtime, fileToken)
+	if err != nil {
+		return "", "", err
+	}
+	extension := fileCommentExtension(title)
+	if isSupportedFileCommentExtension(extension) {
+		return title, extension, nil
+	}
+	if strings.TrimSpace(title) == "" {
+		return "", "", output.ErrWithHint(
+			output.ExitValidation,
+			"unsupported_file_comment_type",
+			"drive +add-comment does not support comments for this Drive file type yet; the file metadata did not return a title",
+			"file comments currently support full comments only for these extensions: "+supportedFileCommentExtensionsText(),
+		)
+	}
+	extensionLabel := extension
+	if extensionLabel == "" {
+		extensionLabel = "no extension"
+	}
+	return "", "", output.ErrWithHint(
+		output.ExitValidation,
+		"unsupported_file_comment_type",
+		fmt.Sprintf("drive +add-comment does not support comments for this Drive file type yet; got %q (%s)", title, extensionLabel),
+		"file comments currently support full comments only for these extensions: "+supportedFileCommentExtensionsText(),
+	)
+}
+
+func fileCommentExtension(title string) string {
+	title = strings.TrimSpace(title)
+	idx := strings.LastIndex(title, ".")
+	if idx == 0 {
+		extension := strings.ToLower(title)
+		if isSupportedFileCommentExtension(extension) {
+			return extension
+		}
+		return ""
+	}
+	if idx < 0 || idx == len(title)-1 {
+		return ""
+	}
+	return strings.ToLower(title[idx:])
+}
+
+func isSupportedFileCommentExtension(extension string) bool {
+	_, ok := supportedFileCommentExtensionSet[strings.TrimSpace(extension)]
+	return ok
+}
+
+func supportedFileCommentExtensionsText() string {
+	return strings.Join(supportedFileCommentExtensions, ", ")
+}
+
+func newSupportedFileCommentExtensionSet(extensions []string) map[string]struct{} {
+	set := make(map[string]struct{}, len(extensions))
+	for _, extension := range extensions {
+		set[extension] = struct{}{}
+	}
+	return set
+}
+
+func validateFileCommentMode(mode commentMode, resolvedObjType string) error {
+	if mode != commentModeLocal {
+		return nil
+	}
+	if resolvedObjType != "" {
+		return output.ErrValidation("wiki resolved to %q, but file comments only support full comments; omit --block-id and --selection-with-ellipsis", resolvedObjType)
+	}
+	return output.ErrValidation("file comments only support full comments; omit --block-id and --selection-with-ellipsis")
+}
+
 func executeSheetComment(runtime *common.RuntimeContext, docRef commentDocRef) error {
 	replyElements, err := parseCommentReplyElements(runtime.Str("content"))
 	if err != nil {
@@ -849,6 +1038,48 @@ func executeSheetComment(runtime *common.RuntimeContext, docRef commentDocRef) e
 	return nil
 }
 
+func executeFileComment(runtime *common.RuntimeContext, target resolvedCommentTarget) error {
+	replyElements, err := parseCommentReplyElements(runtime.Str("content"))
+	if err != nil {
+		return err
+	}
+
+	title, extension, err := ensureSupportedFileCommentTarget(runtime, target.FileToken)
+	if err != nil {
+		return err
+	}
+
+	requestPath := fmt.Sprintf("/open-apis/drive/v1/files/%s/new_comments", validate.EncodePathSegment(target.FileToken))
+	requestBody := buildCommentCreateV2Request("file", "", "", replyElements, nil)
+
+	fmt.Fprintf(runtime.IO().ErrOut, "Creating file comment in %s (%s)\n", common.MaskToken(target.FileToken), extension)
+
+	data, err := runtime.CallAPI("POST", requestPath, nil, requestBody)
+	if err != nil {
+		return err
+	}
+
+	out := map[string]interface{}{
+		"comment_id":     data["comment_id"],
+		"doc_id":         target.DocID,
+		"file_token":     target.FileToken,
+		"file_type":      "file",
+		"file_name":      title,
+		"file_extension": extension,
+		"resolved_by":    target.ResolvedBy,
+		"comment_mode":   string(commentModeFull),
+	}
+	if createdAt := firstPresentValue(data, "created_at", "create_time"); createdAt != nil {
+		out["created_at"] = createdAt
+	}
+	if target.WikiToken != "" {
+		out["wiki_token"] = target.WikiToken
+	}
+
+	runtime.Out(out, nil)
+	return nil
+}
+
 func executeSlidesComment(runtime *common.RuntimeContext, docRef commentDocRef) error {
 	replyElements, err := parseCommentReplyElements(runtime.Str("content"))
 	if err != nil {
diff --git a/shortcuts/drive/drive_add_comment_test.go b/shortcuts/drive/drive_add_comment_test.go
index ed4278a22..7875893eb 100644
--- a/shortcuts/drive/drive_add_comment_test.go
+++ b/shortcuts/drive/drive_add_comment_test.go
@@ -105,6 +105,13 @@ func TestParseCommentDocRef(t *testing.T) {
 			wantKind:  "doc",
 			wantToken: "docToken",
 		},
+		{
+			name:      "raw token with type file",
+			input:     "fileToken",
+			docType:   "file",
+			wantKind:  "file",
+			wantToken: "fileToken",
+		},
 		{
 			name:    "raw token without type",
 			input:   "xxxxxx",
@@ -122,6 +129,12 @@ func TestParseCommentDocRef(t *testing.T) {
 			wantKind:  "slides",
 			wantToken: "pres_123",
 		},
+		{
+			name:      "file url",
+			input:     "https://example.larksuite.com/file/boxcn123?from=share",
+			wantKind:  "file",
+			wantToken: "boxcn123",
+		},
 		{
 			name:    "unsupported url",
 			input:   "https://example.com/not-a-doc",
@@ -545,6 +558,29 @@ func TestBuildCommentCreateV2RequestFull(t *testing.T) {
 	}
 }
 
+func TestBuildCommentCreateV2RequestFile(t *testing.T) {
+	t.Parallel()
+
+	replyElements := []map[string]interface{}{
+		{
+			"type": "text",
+			"text": "README comment",
+		},
+	}
+	got := buildCommentCreateV2Request("file", "", "", replyElements, nil)
+
+	if got["file_type"] != "file" {
+		t.Fatalf("expected file_type file, got %#v", got["file_type"])
+	}
+	anchor, ok := got["anchor"].(map[string]interface{})
+	if !ok {
+		t.Fatalf("expected anchor map, got %#v", got["anchor"])
+	}
+	if blockID, ok := anchor["block_id"].(string); !ok || blockID != fileFullCommentAnchorBlockID {
+		t.Fatalf("expected file anchor.block_id %q, got %#v", fileFullCommentAnchorBlockID, anchor["block_id"])
+	}
+}
+
 func TestBuildCommentCreateV2RequestLocal(t *testing.T) {
 	t.Parallel()
 
@@ -906,6 +942,34 @@ func TestSlidesCommentValidateCompoundBlockID(t *testing.T) {
 	}
 }
 
+func TestFileCommentValidateRejectsBlockID(t *testing.T) {
+	f, stdout, _, _ := cmdutil.TestFactory(t, driveTestConfig())
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"test"}]`,
+		"--block-id", "blk_123",
+		"--as", "user",
+	}, f, stdout)
+	if err == nil || !strings.Contains(err.Error(), "file comments only support full comments") {
+		t.Fatalf("expected file local-comment rejection, got: %v", err)
+	}
+}
+
+func TestFileCommentValidateRejectsSelectionWithEllipsis(t *testing.T) {
+	f, stdout, _, _ := cmdutil.TestFactory(t, driveTestConfig())
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"test"}]`,
+		"--selection-with-ellipsis", "something",
+		"--as", "user",
+	}, f, stdout)
+	if err == nil || !strings.Contains(err.Error(), "file comments only support full comments") {
+		t.Fatalf("expected file local-comment rejection, got: %v", err)
+	}
+}
+
 // ── Slides comment execute tests ────────────────────────────────────────────
 
 func TestSlidesCommentExecuteSuccess(t *testing.T) {
@@ -1116,6 +1180,146 @@ func TestSheetCommentViaWikiMissingBlockID(t *testing.T) {
 	}
 }
 
+func TestFileCommentExecuteSuccess(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, driveTestConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/drive/v1/metas/batch_query",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "success",
+			"data": map[string]interface{}{
+				"metas": []interface{}{
+					map[string]interface{}{"title": "README.txt"},
+				},
+			},
+		},
+	})
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/drive/v1/files/fileToken/new_comments",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "success",
+			"data": map[string]interface{}{"comment_id": "fileComment123", "created_at": 1700000000},
+		},
+	})
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"请补充 README 示例"}]`,
+		"--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !strings.Contains(stdout.String(), "fileComment123") {
+		t.Fatalf("stdout missing comment_id: %s", stdout.String())
+	}
+	out := decodeJSONMap(t, stdout.String())
+	data := mustMapValue(t, out["data"], "data")
+	if got := mustStringField(t, data, "file_type", "data.file_type"); got != "file" {
+		t.Fatalf("stdout file_type = %q, want file\nstdout:\n%s", got, stdout.String())
+	}
+	if got := mustStringField(t, data, "file_name", "data.file_name"); got != "README.txt" {
+		t.Fatalf("stdout file_name = %q, want README.txt\nstdout:\n%s", got, stdout.String())
+	}
+	if got := mustStringField(t, data, "file_extension", "data.file_extension"); got != ".txt" {
+		t.Fatalf("stdout file_extension = %q, want .txt\nstdout:\n%s", got, stdout.String())
+	}
+}
+
+func TestFileCommentExecuteRejectsUnsupportedFileType(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, driveTestConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/drive/v1/metas/batch_query",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "success",
+			"data": map[string]interface{}{
+				"metas": []interface{}{
+					map[string]interface{}{"title": "notes.pdf"},
+				},
+			},
+		},
+	})
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"test"}]`,
+		"--as", "user",
+	}, f, stdout)
+	if err == nil || !strings.Contains(err.Error(), "does not support comments for this Drive file type yet") {
+		t.Fatalf("expected unsupported file comment type error, got: %v", err)
+	}
+	if !strings.Contains(err.Error(), "notes.pdf") {
+		t.Fatalf("expected error to mention unsupported title, got: %v", err)
+	}
+}
+
+func TestFileCommentExecuteRejectsUnexpectedMetadataFormat(t *testing.T) {
+	f, stdout, _, reg := cmdutil.TestFactory(t, driveTestConfig())
+	reg.Register(&httpmock.Stub{
+		Method: "POST", URL: "/open-apis/drive/v1/metas/batch_query",
+		Body: map[string]interface{}{
+			"code": 0, "msg": "success",
+			"data": map[string]interface{}{
+				"metas": []interface{}{"unexpected"},
+			},
+		},
+	})
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"test"}]`,
+		"--as", "user",
+	}, f, stdout)
+	if err == nil || !strings.Contains(err.Error(), "unexpected metadata format") {
+		t.Fatalf("expected unexpected metadata format error, got: %v", err)
+	}
+}
+
+func TestFileCommentSupportedExtensions(t *testing.T) {
+	t.Parallel()
+
+	supported := []string{
+		"README.md",
+		"notes.TXT",
+		"data.json",
+		"table.csv",
+		"main.go",
+		"app.js",
+		"script.py",
+		"slides.pptx",
+		"image.png",
+		"photo.jpg",
+		"photo.jpeg",
+		".md",
+		"archive.zip",
+		"audio.mp3",
+		"video.mp4",
+	}
+	for _, title := range supported {
+		extension := fileCommentExtension(title)
+		if !isSupportedFileCommentExtension(extension) {
+			t.Fatalf("%s extension %q should be supported", title, extension)
+		}
+	}
+
+	unsupported := []string{
+		"report.pdf",
+		"word.docx",
+		"sheet.xlsx",
+		"unknown.bin",
+		"no-extension",
+		".gitignore",
+	}
+	for _, title := range unsupported {
+		extension := fileCommentExtension(title)
+		if isSupportedFileCommentExtension(extension) {
+			t.Fatalf("%s extension %q should not be supported", title, extension)
+		}
+	}
+	if extension := fileCommentExtension(".gitignore"); extension != "" {
+		t.Fatalf("dotfile extension = %q, want empty", extension)
+	}
+}
+
 // ── DryRun coverage ─────────────────────────────────────────────────────────
 
 func TestDryRunSheetDirectURL(t *testing.T) {
@@ -1346,6 +1550,43 @@ func TestDryRunDocxFullComment(t *testing.T) {
 	}
 }
 
+func TestDryRunFileDirectURL(t *testing.T) {
+	f, stdout, _, _ := cmdutil.TestFactory(t, driveTestConfig())
+	err := mountAndRunDrive(t, DriveAddComment, []string{
+		"+add-comment",
+		"--doc", "https://example.larksuite.com/file/fileToken",
+		"--content", `[{"type":"text","text":"test"}]`,
+		"--dry-run", "--as", "user",
+	}, f, stdout)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !strings.Contains(stdout.String(), "verify supported file metadata") {
+		t.Fatalf("dry-run output missing supported file metadata verification step: %s", stdout.String())
+	}
+	out := decodeJSONMap(t, stdout.String())
+	api := mustSliceValue(t, out["api"], "api")
+	if len(api) != 2 {
+		t.Fatalf("expected 2 dry-run api calls, got %d\nstdout:\n%s", len(api), stdout.String())
+	}
+	verifyCall := mustMapValue(t, api[0], "api[0]")
+	createCall := mustMapValue(t, api[1], "api[1]")
+	verifyBody := mustMapValue(t, verifyCall["body"], "api[0].body")
+	createBody := mustMapValue(t, createCall["body"], "api[1].body")
+	requestDocs := mustSliceValue(t, verifyBody["request_docs"], "api[0].body.request_docs")
+	requestDoc := mustMapValue(t, requestDocs[0], "api[0].body.request_docs[0]")
+	if got := mustStringField(t, requestDoc, "doc_type", "api[0].body.request_docs[0].doc_type"); got != "file" {
+		t.Fatalf("metadata query doc_type = %q, want file\nstdout:\n%s", got, stdout.String())
+	}
+	if got := mustStringField(t, createBody, "file_type", "api[1].body.file_type"); got != "file" {
+		t.Fatalf("comment create file_type = %q, want file\nstdout:\n%s", got, stdout.String())
+	}
+	anchor := mustMapValue(t, createBody["anchor"], "api[1].body.anchor")
+	if got := mustStringField(t, anchor, "block_id", "api[1].body.anchor.block_id"); got != fileFullCommentAnchorBlockID {
+		t.Fatalf("comment create anchor.block_id = %q, want %q\nstdout:\n%s", got, fileFullCommentAnchorBlockID, stdout.String())
+	}
+}
+
 // ── resolveCommentTarget coverage ───────────────────────────────────────────
 
 func TestResolveWikiToDocxFullComment(t *testing.T) {
@@ -1397,7 +1638,7 @@ func TestResolveWikiToUnsupportedType(t *testing.T) {
 		"--content", `[{"type":"text","text":"test"}]`,
 		"--as", "user",
 	}, f, stdout)
-	if err == nil || !strings.Contains(err.Error(), "only support doc/docx/sheet/slides") {
+	if err == nil || !strings.Contains(err.Error(), "only support doc/docx/file/sheet/slides") {
 		t.Fatalf("expected unsupported type error, got: %v", err)
 	}
 }
diff --git a/skills/lark-drive/SKILL.md b/skills/lark-drive/SKILL.md
index e98f07c5c..6e62d1227 100644
--- a/skills/lark-drive/SKILL.md
+++ b/skills/lark-drive/SKILL.md
@@ -130,8 +130,8 @@ Drive Folder (云空间文件夹)
 | 操作 | 需要的 Token | 说明 |
 |------|-------------|------|
 | 读取文档内容 | `file_token` / 通过 `docs +fetch --api-version v2` 自动处理 | `docs +fetch --api-version v2` 支持直接传入 URL |
-| 添加局部评论（划词评论） | `file_token` | 传 `--block-id` 时，`drive +add-comment` 会创建局部评论；`docx` 支持文本定位或 block_id，`sheet` 使用 `<sheetId>!<cell>`，`slides` 使用 `<slide-block-type>!<xml-id>`，且都支持最终解析到对应类型的 wiki URL |
-| 添加全文评论 | `file_token` | 不传 `--block-id` 时，`drive +add-comment` 默认创建全文评论；支持 `docx`、旧版 `doc` URL，以及最终解析为 `doc`/`docx` 的 wiki URL |
+| 添加局部评论（划词评论） | `file_token` | 传 `--block-id` 时，`drive +add-comment` 会创建局部评论；`docx` 支持文本定位或 block_id，`sheet` 使用 `<sheetId>!<cell>`，`slides` 使用 `<slide-block-type>!<xml-id>`，且都支持最终解析到对应类型的 wiki URL；Drive file 不支持局部评论 |
+| 添加全文评论 | `file_token` | 不传 `--block-id` 时，`drive +add-comment` 默认创建全文评论；支持 `docx`、旧版 `doc` URL、白名单扩展名的 Drive file，以及最终解析为 `doc`/`docx`/`file` 的 wiki URL |
 | 下载文件 | `file_token` | 从文件 URL 中直接提取 |
 | 上传文件 | `folder_token` / `wiki_node_token` | 目标位置的 token |
 | 列出文档评论 | `file_token` | 同添加评论 |
@@ -139,15 +139,16 @@ Drive Folder (云空间文件夹)
 ### 评论能力边界（关键！）
 
 - `drive +add-comment` 支持两种模式。
-- 全文评论：未传 `--block-id` 时默认启用，也可显式传 `--full-comment`；支持 `docx`、旧版 `doc` URL，以及最终解析为 `doc`/`docx` 的 wiki URL。
-- 局部评论：传 `--block-id` 时启用；不同文档类型的支持范围与参数格式见 [`drive +add-comment` 行为说明](references/lark-drive-add-comment.md#行为说明)。
+- 全文评论：未传 `--block-id` 时默认启用，也可显式传 `--full-comment`；支持 `docx`、旧版 `doc` URL、白名单扩展名的 Drive file，以及最终解析为 `doc`/`docx`/`file` 的 wiki URL。
+- 局部评论：传 `--block-id` 时启用；`docx` 支持文本定位或 block id，`sheet` 支持 `<sheetId>!<cell>`，`slides` 支持 `<slide-block-type>!<xml-id>`，wiki URL 解析到这些类型时也支持对应局部评论。Drive file 本次只支持全文评论，不支持局部评论。
+- Drive file 评论仅支持白名单扩展名：`.md`、`.txt`、`.json`、`.csv`、`.go`、`.js`、`.py`、`.pptx`、`.png`、`.jpg`、`.jpeg`、`.zip`、`.mp3`、`.mp4`。`.pdf`、`.docx`、`.xlsx` 等未在白名单内的普通文件暂不支持，CLI 会直接报错提示当前还不支持这种类型的评论。
 - Review / 审阅 / 校对 / 逐条指出问题场景优先使用局部评论，不要把多个可定位问题汇总成一条全文评论；具体参数和定位方式见 [`drive +add-comment` 行为说明](references/lark-drive-add-comment.md#行为说明)。
 - `drive +add-comment` 的 `--content` 需要传 `reply_elements` JSON 数组字符串，例如 `--content '[{"type":"text","text":"正文"}]'`。
 - `slides` 评论要求显式传 `--block-id <slide-block-type>!<xml-id>`；CLI 会将其拆分后写入 `anchor.block_id` 和 `anchor.slide_block_type`。其中 `<xml-id>` 是 PPT XML 协议中的元素 `id`；不支持 `--selection-with-ellipsis` 和 `--full-comment`。
 
 - 评论写入内容（添加评论、回复评论、编辑回复）里的文本不能直接出现 `<`、`>`；提交前必须先转义：`<` -> `&lt;`，`>` -> `&gt;`。
 - 使用 `drive +add-comment` 时，shortcut 会对 `type=text` 的文本元素自动做上述转义兜底；如果直接调用 `drive file.comments create_v2`、`drive file.comment.replys create`、`drive file.comment.replys update`，则需要在请求里自行传入已转义的内容。
-- 如果 wiki 解析后不是 `doc`/`docx`/`sheet`/`slides`，不要用 `+add-comment`。
+- 如果 wiki 解析后不是 `doc`/`docx`/`file`/`sheet`/`slides`，不要用 `+add-comment`。
 - 如果需要更底层地直接调用评论 V2 协议，再走原生 API：先执行 `lark-cli schema drive.file.comments.create_v2`，再执行 `lark-cli drive file.comments create_v2 ...`。全文评论省略 `anchor`，局部评论传 `anchor.block_id`。
 
 ### 评论查询与统计口径（关键！）
@@ -265,7 +266,7 @@ Shortcut 是对常用操作的高级封装（`lark-cli drive +<verb> [flags]`）
 | [`+pull`](references/lark-drive-pull.md) | File-level Drive → local mirror. Duplicate remote `rel_path` conflicts fail by default; for duplicate files, `rename` downloads all copies with stable hashed suffixes, while `newest` / `oldest` pick one. `--if-exists` supports `overwrite` / `smart` / `skip` (`smart` is a best-effort modified-time incremental mode for repeat syncs). `--delete-local` requires `--yes`, only removes regular files, and is skipped after item failures. `--local-dir` must stay inside cwd. |
 | `+sync` | Two-way local ↔ Drive sync. Reuses `+status` diff buckets, pulls `new_remote`, pushes `new_local`, and resolves `modified` via `--on-conflict=remote-wins|local-wins|keep-both|ask`. `--quick` enables best-effort modified-time diffing (timestamp mismatches can still trigger real pull/push actions), `--on-duplicate-remote` supports `fail|newest|oldest`, and the command is intentionally non-destructive (no delete on either side). |
 | [`+create-shortcut`](references/lark-drive-create-shortcut.md) | Create a shortcut to an existing Drive file in another folder |
-| [`+add-comment`](references/lark-drive-add-comment.md) | Add a comment to doc/docx/sheet/slides, also supports wiki URL resolving to doc/docx/sheet/slides |
+| [`+add-comment`](references/lark-drive-add-comment.md) | Add a comment to doc/docx/file/sheet/slides, also supports wiki URL resolving to doc/docx/file/sheet/slides; file targets support selected extensions and full comments only |
 | [`+export`](references/lark-drive-export.md) | Export a doc/docx/sheet/bitable to a local file with limited polling; supports `--file-name` for local naming |
 | [`+export-download`](references/lark-drive-export-download.md) | Download an exported file by file_token |
 | [`+import`](references/lark-drive-import.md) | Import a local file to Drive as a cloud document (docx, sheet, bitable) |
diff --git a/skills/lark-drive/references/lark-drive-add-comment.md b/skills/lark-drive/references/lark-drive-add-comment.md
index 41ac99975..35c181537 100644
--- a/skills/lark-drive/references/lark-drive-add-comment.md
+++ b/skills/lark-drive/references/lark-drive-add-comment.md
@@ -3,7 +3,7 @@
 
 > **前置条件：** 先阅读 [`../lark-shared/SKILL.md`](../../lark-shared/SKILL.md) 了解认证、全局参数和安全规则。
 
-给文档、电子表格或飞书幻灯片添加评论。底层统一走 `/open-apis/drive/v1/files/:file_token/new_comments`（`create_v2`）接口；未指定位置时省略 `anchor` 创建全文评论，指定 `--block-id` 时传入 `anchor.block_id` 创建局部评论。支持直接传 docx URL/token、旧版 doc URL（仅全文评论）、sheet URL、slides URL，也支持传最终可解析为 doc/docx/sheet/slides 的 wiki URL。
+给文档、受支持的 Drive 普通文件、电子表格或飞书幻灯片添加评论。底层统一走 `/open-apis/drive/v1/files/:file_token/new_comments`（`create_v2`）接口；未指定位置时省略 `anchor` 创建全文评论，指定 `--block-id` 时传入 `anchor.block_id` 创建局部评论。支持直接传 docx URL/token、旧版 doc URL（仅全文评论）、Drive file URL/token（**仅支持白名单扩展名，且只支持全文评论**）、sheet URL、slides URL，也支持传最终可解析为 doc/docx/file/sheet/slides 的 wiki URL。
 
 ## 命令
 
@@ -24,13 +24,24 @@ lark-cli drive +add-comment \
   --doc "https://example.larksuite.com/wiki/<WIKI_TOKEN>" \
   --content '[{"type":"text","text":"这里需要一段全文评论"}]'
 
+# 给受支持的 Drive 普通文件添加全文评论
+# 注意：CLI 会先查询 drive metas，只有白名单扩展名才允许评论
+lark-cli drive +add-comment \
+  --doc "https://example.larksuite.com/file/<FILE_TOKEN>" \
+  --content '[{"type":"text","text":"请补充文件说明"}]'
+
+# 裸 token 也支持，但必须显式声明 --type file
+lark-cli drive +add-comment \
+  --doc "<FILE_TOKEN>" --type file \
+  --content '[{"type":"text","text":"请补充目录说明"}]'
+
 # 给 docx 文档的指定 block 添加局部评论（block_id 可通过 docs +fetch --api-version v2 --detail with-ids 获取）
 lark-cli drive +add-comment \
   --doc "https://example.larksuite.com/docx/<DOC_ID>" \
   --block-id "<BLOCK_ID>" \
   --content '[{"type":"text","text":"请补充流程说明"}]'
 
-# wiki 链接也支持局部评论，但解析结果必须是 docx
+# wiki 链接也支持局部评论；解析结果可以是 docx/sheet/slides，block-id 格式按目标类型传
 lark-cli drive +add-comment \
   --doc "https://example.larksuite.com/wiki/<WIKI_TOKEN>" \
   --block-id "<BLOCK_ID>" \
@@ -128,8 +139,8 @@ lark-cli drive +add-comment \
 
 | 参数 | 必填 | 说明 |
 |------|------|------|
-| `--doc` | 是 | 文档 URL / token、sheet / slides URL，或可解析到 `doc`/`docx`/`sheet`/`slides` 的 wiki URL |
-| `--type` | 裸 token 时必填 | 文档类型：`doc`、`docx`、`sheet`、`slides`。URL 输入时自动识别，无需传 |
+| `--doc` | 是 | 文档 URL / token、file / sheet / slides URL，或可解析到 `doc`/`docx`/`file`/`sheet`/`slides` 的 wiki URL |
+| `--type` | 裸 token 时必填 | 文档类型：`doc`、`docx`、`file`、`sheet`、`slides`。URL 输入时自动识别，无需传 |
 | `--content` | 是 | `reply_elements` JSON 数组字符串。示例：`'[{"type":"text","text":"文本"},{"type":"mention_user","text":"ou_xxx"},{"type":"link","text":"https://example.com"}]'` |
 | `--full-comment` | 否 | 显式指定创建全文评论；未传 `--block-id` 时也会默认走全文评论（不适用于 sheet） |
 | `--block-id` | 局部评论时必填 | 目标块 ID，可通过 `docs +fetch --api-version v2 --detail with-ids` 获取。**Sheet 评论**：格式为 `<sheetId>!<cell>`（如 `a281f9!D6`） |
@@ -138,7 +149,10 @@ lark-cli drive +add-comment \
 
 - **局部评论需要先获取 block ID**：先调用 `docs +fetch --api-version v2 --doc <TOKEN> --detail with-ids` 获取带有 block ID 的文档内容，然后使用 `--block-id` 指定目标块。
 - **Review 场景优先局部评论**：审阅、校对、逐条指出问题时，必须先尝试定位到具体 block / 单元格 / slide 元素，并逐问题创建局部评论；不要把所有问题合并成一条全文评论。
-- 未传 `--block-id` 时，shortcut 默认创建**全文评论**；也可以显式传 `--full-comment`。全文评论支持 `docx`、旧版 `doc` URL，以及最终可解析为 `doc`/`docx` 的 wiki URL。
+- 未传 `--block-id` 时，shortcut 默认创建**全文评论**；也可以显式传 `--full-comment`。全文评论支持 `docx`、旧版 `doc` URL、白名单扩展名的 Drive file，以及最终可解析为 `doc`/`docx`/`file` 的 wiki URL。
+- **Drive file 评论**：仅支持白名单扩展名的普通文件。当前支持：`.md`、`.txt`、`.json`、`.csv`、`.go`、`.js`、`.py`、`.pptx`、`.png`、`.jpg`、`.jpeg`、`.zip`、`.mp3`、`.mp4`。
+- **Drive file 暂不支持**：`.pdf`、`.docx`、`.xlsx` 等未在白名单内的普通文件会被 CLI 拒绝，并提示“当前还不支持这种类型的评论”。这些类型虽然可能接受 OpenAPI 请求，但在页面评论展示上存在问题。
+- **Drive file 只支持全文评论**：file 目标不支持局部评论，不允许传 `--block-id` 或 `--selection-with-ellipsis`。由于当前 OpenAPI 要求 file 评论传入非空 `anchor.block_id`，CLI 会固定传占位值 `test`，UI 上仍表现为文件全文评论。
 - 传 `--block-id` 时，shortcut 创建**局部评论（划词评论）**；该模式支持 `docx`、`sheet`、`slides`，以及最终可解析为这些类型的 wiki URL。
 - **Sheet 评论**：当 `--doc` 为 sheet URL 或 wiki 解析为 sheet 时，使用 `--block-id "<sheetId>!<cell>"` 指定单元格（如 `a281f9!D6`）；sheet 没有全文评论，`--full-comment` 不可用。
 - **Slide 评论**：当 `--doc` 为 slides URL、`--type slides`，或 wiki 解析为 slides 时，必须传 `--block-id "<SLIDE_BLOCK_TYPE>!<XML_ELEMENT_ID>"`。CLI 会将其拆分映射到 `anchor.block_id` / `anchor.slide_block_type`。此时 `--full-comment` 和 `--selection-with-ellipsis` 不可用。
diff --git a/tests/cli_e2e/drive/coverage.md b/tests/cli_e2e/drive/coverage.md
index 337323cbc..9cfc8f26c 100644
--- a/tests/cli_e2e/drive/coverage.md
+++ b/tests/cli_e2e/drive/coverage.md
@@ -2,8 +2,8 @@
 
 ## Metrics
 - Denominator: 29 leaf commands
-- Covered: 8
-- Coverage: 27.6%
+- Covered: 9
+- Coverage: 31.0%
 
 ## Summary
 - TestDrive_FilesCreateFolderWorkflow: proves `drive files create_folder` in `create_folder as bot`; helper asserts the returned folder token and registers best-effort cleanup via `drive files delete`.
@@ -11,18 +11,20 @@
 - TestDrive_UploadWorkflow: proves `drive +upload` against the real backend in both create and overwrite modes. First uploads a fresh file into a temporary Drive folder, then re-uploads new bytes with `--file-token` against the returned token, asserts the overwrite keeps the token stable, and finally downloads the file to confirm the remote content changed.
 - TestDrive_DuplicateRemoteWorkflow: proves the duplicate-remote workflows against the real backend. One subtest uploads two same-name files into the same Drive folder and asserts `drive +status` and default `drive +pull` both fail with `duplicate_remote_path`, while `drive +pull --on-duplicate-remote=rename` succeeds, downloads both files, and writes a hashed renamed sibling locally. The other subtest uploads duplicate remote files, runs `drive +push --on-duplicate-remote=newest --if-exists=overwrite --delete-remote --yes`, and then re-runs `drive +status` to prove the mirror converged to a single unchanged `dup.txt`.
 - TestDrive_ApplyPermissionDryRun / TestDrive_ApplyPermissionDryRunRejectsFullAccess: dry-run coverage for `drive +apply-permission`; asserts URL→type inference for docx/sheet/slides, explicit `--type` overriding URL inference when both a recognized URL and `--type` are supplied, bare-token + explicit `--type` path, request method/URL/type-query/perm/remark body shape, optional `remark` omission when unset, and client-side rejection of `--perm full_access`. Runs without hitting the live API.
+- TestDriveAddCommentDryRun_File: dry-run coverage for `drive +add-comment` on supported Drive file targets; pins the `metas.batch_query -> files/:token/new_comments` request chain, `file_type=file`, and the required placeholder `anchor.block_id`.
+- TestDriveAddCommentMarkdownFileWorkflow: opt-in live workflow skeleton for the same path, gated by `LARK_DRIVE_MD_COMMENT_E2E=1`.
 - TestDriveExportDryRun_FileNameMetadata: dry-run coverage for `drive +export`; asserts export task request shape and local `--file-name` / `--output-dir` metadata without calling live APIs.
 - TestDrive_PullDryRun / TestDrive_PullDryRunAcceptsDuplicateRemoteStrategies: dry-run coverage for `drive +pull`; asserts the list-files request shape, Validate-stage safety guards, and acceptance of `--on-duplicate-remote=rename|newest|oldest` by the real CLI binary.
 - TestDrive_PushDryRun / TestDrive_PushDryRunAcceptsDuplicateRemoteStrategies: dry-run coverage for `drive +push`; asserts the list-files request shape, Validate-stage safety guards, conditional delete preflight, and acceptance of `--on-duplicate-remote=newest|oldest` by the real CLI binary.
 - Cleanup note: `drive files delete` is only exercised in cleanup and is intentionally left uncovered.
-- Blocked area: live export, comment, permission, subscription, and reply flows still need deterministic remote fixtures and filesystem setup.
+- Blocked area: live export, permission, subscription, reply, and file comment API flows still need deterministic remote fixtures and filesystem setup.
 - Dry-run note: `drive_upload_dryrun_test.go::TestDriveUploadDryRun_WikiTarget` and `TestDriveUploadDryRun_WithFileToken` cover the wiki-target and overwrite request shapes for `drive +upload`; live upload/status/duplicate workflows also use real `+upload` against the backend.
 
 ## Command Table
 
 | Status | Cmd | Type | Testcase | Key parameter shapes | Notes / uncovered reason |
 | --- | --- | --- | --- | --- | --- |
-| ✕ | drive +add-comment | shortcut |  | none | no comment workflow yet |
+| ✓ | drive +add-comment | shortcut | drive_add_comment_dryrun_test.go::TestDriveAddCommentDryRun_File | `--doc` file URL vs bare token + `--type file`; supported-extension metadata gate; placeholder `anchor.block_id` | dry-run coverage in place; opt-in live workflow exists behind `LARK_DRIVE_MD_COMMENT_E2E=1` |
 | ✓ | drive +apply-permission | shortcut | drive_apply_permission_dryrun_test.go::TestDrive_ApplyPermissionDryRun | `--token` URL vs bare; `--type` (enum) with URL inference; `--perm view\|edit`; `--remark` optional | dry-run only; no live-apply E2E because a real request pushes a card to the owner |
 | ✕ | drive +delete | shortcut |  | none | no primary delete workflow yet |
 | ✕ | drive +download | shortcut |  | none | no file fixture workflow yet |
diff --git a/tests/cli_e2e/drive/drive_add_comment_dryrun_test.go b/tests/cli_e2e/drive/drive_add_comment_dryrun_test.go
new file mode 100644
index 000000000..1a65239fc
--- /dev/null
+++ b/tests/cli_e2e/drive/drive_add_comment_dryrun_test.go
@@ -0,0 +1,53 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package drive
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	clie2e "github.com/larksuite/cli/tests/cli_e2e"
+	"github.com/stretchr/testify/require"
+	"github.com/tidwall/gjson"
+)
+
+func TestDriveAddCommentDryRun_File(t *testing.T) {
+	setDriveDryRunConfigEnv(t)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	t.Cleanup(cancel)
+
+	result, err := clie2e.RunCmd(ctx, clie2e.Request{
+		Args: []string{
+			"drive", "+add-comment",
+			"--doc", "https://example.larksuite.com/file/fileDryRunComment",
+			"--content", `[{"type":"text","text":"please update README"}]`,
+			"--dry-run",
+		},
+		DefaultAs: "bot",
+	})
+	require.NoError(t, err)
+	result.AssertExitCode(t, 0)
+
+	out := result.Stdout
+	if got := gjson.Get(out, "api.0.url").String(); got != "/open-apis/drive/v1/metas/batch_query" {
+		t.Fatalf("api.0.url=%q, want metas/batch_query\nstdout:\n%s", got, out)
+	}
+	if got := gjson.Get(out, "api.0.body.request_docs.0.doc_type").String(); got != "file" {
+		t.Fatalf("api.0.body.request_docs.0.doc_type=%q, want file\nstdout:\n%s", got, out)
+	}
+	if got := gjson.Get(out, "api.1.url").String(); got != "/open-apis/drive/v1/files/fileDryRunComment/new_comments" {
+		t.Fatalf("api.1.url=%q, want new_comments\nstdout:\n%s", got, out)
+	}
+	if got := gjson.Get(out, "api.1.body.file_type").String(); got != "file" {
+		t.Fatalf("api.1.body.file_type=%q, want file\nstdout:\n%s", got, out)
+	}
+	if !gjson.Get(out, "api.1.body.anchor.block_id").Exists() {
+		t.Fatalf("api.1.body.anchor.block_id should exist for file comment\nstdout:\n%s", out)
+	}
+	if got := gjson.Get(out, "api.1.body.anchor.block_id").String(); got != "test" {
+		t.Fatalf("api.1.body.anchor.block_id=%q, want test\nstdout:\n%s", got, out)
+	}
+}
diff --git a/tests/cli_e2e/drive/drive_add_comment_workflow_test.go b/tests/cli_e2e/drive/drive_add_comment_workflow_test.go
new file mode 100644
index 000000000..1ea83326f
--- /dev/null
+++ b/tests/cli_e2e/drive/drive_add_comment_workflow_test.go
@@ -0,0 +1,84 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package drive
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	clie2e "github.com/larksuite/cli/tests/cli_e2e"
+	"github.com/stretchr/testify/require"
+	"github.com/tidwall/gjson"
+)
+
+func TestDriveAddCommentMarkdownFileWorkflow(t *testing.T) {
+	if os.Getenv("LARK_DRIVE_MD_COMMENT_E2E") == "" {
+		t.Skip("set LARK_DRIVE_MD_COMMENT_E2E=1 to run the supported file comment workflow")
+	}
+
+	parentT := t
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+	t.Cleanup(cancel)
+
+	suffix := clie2e.GenerateSuffix()
+	fileName := "lark-cli-e2e-drive-comment-" + suffix + ".md"
+
+	createResult, err := clie2e.RunCmd(ctx, clie2e.Request{
+		Args: []string{
+			"markdown", "+create",
+			"--name", fileName,
+			"--content", "# Comment target\n\nbody\n",
+		},
+		DefaultAs: "bot",
+	})
+	require.NoError(t, err)
+	createResult.AssertExitCode(t, 0)
+	createResult.AssertStdoutStatus(t, true)
+
+	fileToken := gjson.Get(createResult.Stdout, "data.file_token").String()
+	require.NotEmpty(t, fileToken, "stdout:\n%s", createResult.Stdout)
+
+	parentT.Cleanup(func() {
+		cleanupCtx, cleanupCancel := clie2e.CleanupContext()
+		defer cleanupCancel()
+
+		deleteResult, deleteErr := clie2e.RunCmd(cleanupCtx, clie2e.Request{
+			Args: []string{
+				"drive", "+delete",
+				"--file-token", fileToken,
+				"--type", "file",
+				"--yes",
+			},
+			DefaultAs: "bot",
+		})
+		clie2e.ReportCleanupFailure(parentT, "delete file comment target "+fileToken, deleteResult, deleteErr)
+	})
+
+	commentResult, err := clie2e.RunCmdWithRetry(ctx, clie2e.Request{
+		Args: []string{
+			"drive", "+add-comment",
+			"--doc", fileToken,
+			"--type", "file",
+			"--content", `[{"type":"text","text":"please update README"}]`,
+		},
+		DefaultAs: "bot",
+	}, clie2e.RetryOptions{})
+	require.NoError(t, err)
+	commentResult.AssertExitCode(t, 0)
+	commentResult.AssertStdoutStatus(t, true)
+
+	commentID := gjson.Get(commentResult.Stdout, "data.comment_id").String()
+	require.NotEmpty(t, commentID, "stdout:\n%s", commentResult.Stdout)
+	if got := gjson.Get(commentResult.Stdout, "data.file_type").String(); got != "file" {
+		t.Fatalf("data.file_type=%q, want file\nstdout:\n%s", got, commentResult.Stdout)
+	}
+	if got := gjson.Get(commentResult.Stdout, "data.file_name").String(); got != fileName {
+		t.Fatalf("data.file_name=%q, want %q\nstdout:\n%s", got, fileName, commentResult.Stdout)
+	}
+	if got := gjson.Get(commentResult.Stdout, "data.file_extension").String(); got != ".md" {
+		t.Fatalf("data.file_extension=%q, want .md\nstdout:\n%s", got, commentResult.Stdout)
+	}
+}