diff --git a/src/modes/detector.ts b/src/modes/detector.ts
index c15ce88a1..8d477b9cc 100644
--- a/src/modes/detector.ts
+++ b/src/modes/detector.ts
@@ -67,6 +67,7 @@ export function detectMode(context: GitHubContext): AutoDetectedMode {
       "synchronize",
       "ready_for_review",
       "reopened",
+      "labeled",
     ];
     if (context.eventAction && supportedActions.includes(context.eventAction)) {
       // If prompt is provided, use agent mode (default for automation)
@@ -103,6 +104,7 @@ function validateTrackProgressEvent(context: GitHubContext): void {
       "synchronize",
       "ready_for_review",
       "reopened",
+      "labeled",
     ];
     if (!validActions.includes(context.eventAction)) {
       throw new Error(
diff --git a/test/modes/detector.test.ts b/test/modes/detector.test.ts
index c8a6c75ff..ccaf32467 100644
--- a/test/modes/detector.test.ts
+++ b/test/modes/detector.test.ts
@@ -61,6 +61,20 @@ describe("detectMode with enhanced routing", () => {
       expect(detectMode(context)).toBe("tag");
     });
 
+    it("should use tag mode when track_progress is true for pull_request.labeled", () => {
+      const context: GitHubContext = {
+        ...baseContext,
+        eventName: "pull_request",
+        eventAction: "labeled",
+        payload: { pull_request: { number: 1 } } as any,
+        entityNumber: 1,
+        isPR: true,
+        inputs: { ...baseContext.inputs, trackProgress: true },
+      };
+
+      expect(detectMode(context)).toBe("tag");
+    });
+
     it("should use agent mode when track_progress is false for pull_request.opened", () => {
       const context: GitHubContext = {
         ...baseContext,