diff --git a/chatgpt-suno-tampermonkey.user.js b/chatgpt-suno-tampermonkey.user.js
index 00eebc6..ddcf3dd 100644
--- a/chatgpt-suno-tampermonkey.user.js
+++ b/chatgpt-suno-tampermonkey.user.js
@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         ChatGPT to Suno Prompt Copier
 // @namespace    local.suno-helper
-// @version      0.7.3
+// @version      0.7.4
 // @description  Copy structured ChatGPT song prompt versions into Suno fields.
 // @author       local
 // @match        https://chatgpt.com/*
@@ -27,6 +27,7 @@
 (function () {
   "use strict";
 
+  const SCRIPT_VERSION = "0.7.4";
   const STORAGE_KEY = "chatgptSunoPromptSlots";
   const SLOT_COUNT = 2;
   const isChatGPT = location.hostname.includes("chatgpt.com") || location.hostname.includes("chat.openai.com");
@@ -205,7 +206,7 @@
     if (mode) panel.classList.add(mode);
     panel.innerHTML = `
       <div class="cgs-head">
-        <span>${escapeHtml(title)}</span>
+        <span>${escapeHtml(title)} <span class="cgs-muted">v${SCRIPT_VERSION}</span></span>
         <button class="cgs-btn" type="button" data-cgs-toggle>_</button>
       </div>
       <div class="cgs-body"></div>
@@ -1077,6 +1078,18 @@
     }
   }
 
+  async function readCompanionHealth() {
+    const response = await fetch("http://127.0.0.1:17873/health", {
+      method: "GET",
+      cache: "no-store",
+    });
+    const text = await response.text();
+    if (!response.ok) {
+      throw new Error(`${response.status} ${response.statusText}: ${text.slice(0, 160)}`);
+    }
+    return tryParseJson(text) || {};
+  }
+
   async function bootSuno() {
     const body = createPanel("Suno Prompt Paste");
     const slots = await readSlots();
@@ -1103,6 +1116,9 @@
       <div class="cgs-row">
         <button class="cgs-btn cgs-wide" type="button" data-cgs-test-companion>연결 테스트</button>
       </div>
+      <div class="cgs-row">
+        <button class="cgs-btn cgs-wide" type="button" data-cgs-copy-diagnostics>진단 복사</button>
+      </div>
       <div class="cgs-row">
         <button class="cgs-btn cgs-primary cgs-wide" type="button" data-cgs-process-library>WAV + 메타데이터 다운</button>
       </div>
@@ -1211,6 +1227,40 @@
     body.querySelector("[data-cgs-test-companion]").addEventListener("click", async () => {
       await testCompanion(body);
     });
+
+    body.querySelector("[data-cgs-copy-diagnostics]").addEventListener("click", async () => {
+      if (!libraryTracks.length) {
+        libraryTracks = scanSunoLibraryTracks();
+        renderLibraryTrackSelect();
+      }
+      const selectedIndex = Number(libraryTrackSelect.value || 0);
+      const selectedTrack = libraryTracks[selectedIndex];
+      let health = {};
+      let healthError = "";
+      try {
+        health = await readCompanionHealth();
+      } catch (error) {
+        healthError = error.message || String(error);
+      }
+      const payload = {
+        scriptVersion: SCRIPT_VERSION,
+        location: location.href,
+        detectedTracks: libraryTracks.length,
+        visibleRows: getVisibleLibraryRows().length,
+        selectedIndex,
+        selectedTrack: selectedTrack ? {
+          id: selectedTrack.id || "",
+          title: selectedTrack.title || "",
+          hasWavUrl: Boolean(selectedTrack.wavUrl),
+          hasImageUrl: Boolean(selectedTrack.imageUrl),
+          hasLyrics: Boolean(selectedTrack.lyrics),
+        } : null,
+        capturedSunoResponses: capturedSunoResponses.length,
+        companion: healthError ? { ok: false, error: healthError } : health,
+      };
+      GM_setClipboard(JSON.stringify(payload, null, 2), "text");
+      setStatus(body, `진단 복사 완료: v${SCRIPT_VERSION}, 감지 ${libraryTracks.length}곡, 로컬 ${healthError ? "실패" : "OK"}`);
+    });
   }
 
   function safeBootSuno() {