diff --git a/skills/gemini-web-generate/SKILL.md b/skills/gemini-web-generate/SKILL.md
index 4fd1c76..48a884c 100644
--- a/skills/gemini-web-generate/SKILL.md
+++ b/skills/gemini-web-generate/SKILL.md
@@ -80,6 +80,16 @@ $NODE $CLI generate --session <id> --prompt "最终调整" --mode single
 $NODE $CLI generate --chatUrl "https://gemini.google.com/app/xxxx" --prompt "换成水彩风格"
 ```
 
+### 仅下载已有图片（不生成新图）
+
+打开已有生图对话，直接下载所有已生成的图片，不发送新提示词：
+
+```bash
+$NODE $CLI generate --chatUrl "https://gemini.google.com/app/xxxx" --mode single
+```
+
+不加 `--prompt` 即进入纯下载模式，自动下载对话中所有已生成图片后关闭标签页。
+
 ### 状态与诊断
 
 ```bash
diff --git a/skills/gemini-web-generate/scripts/cli.js b/skills/gemini-web-generate/scripts/cli.js
index b5063f2..05ece7f 100644
--- a/skills/gemini-web-generate/scripts/cli.js
+++ b/skills/gemini-web-generate/scripts/cli.js
@@ -225,6 +225,9 @@ close 参数:
   # 通过之前的对话链接继续生图
   node cli.js generate --chatUrl "https://gemini.google.com/app/4c089f364e1cf745" --prompt "换成晚上场景"
 
+  # 仅下载已有图片（chatUrl 不加 --prompt，直接下载）
+  node cli.js generate --chatUrl "https://gemini.google.com/app/4c089f364e1cf745" --mode single
+
 环境变量:
   CDP_URL    Chrome DevTools Protocol 连接地址（默认 http://127.0.0.1:9222）
 `.trim();
@@ -289,7 +292,12 @@ close 参数:
         }
 
         if (!prompt) {
-          error('--prompt is required');
+          if (args.chatUrl) {
+            // --chatUrl without --prompt: enter download-only mode
+            isDownloadOnly = true;
+          } else {
+            error('--prompt is required');
+          }
         }
 
         // Support --images path1,path2,... or --image single
@@ -351,6 +359,58 @@ close 参数:
           emit('progress', { step: 'login', message: `Logged in as: ${loginStatus.account}` });
         }
 
+        // Download-only mode: --chatUrl without --prompt, download existing images directly
+        if (isDownloadOnly) {
+          emit('progress', { step: 'download', message: 'Download-only mode: downloading existing images...' });
+
+          // Wait a moment for the page to fully load embedded images
+          await sleep(3000);
+
+          // Count visible download buttons
+          const btnCount = await page.evaluate(() => {
+            const buttons = document.querySelectorAll('button.generated-image-button');
+            return Array.from(buttons).filter(b => b.offsetParent !== null).length;
+          });
+
+          if (btnCount === 0) {
+            emit('error', {
+              message: 'No existing images found to download on this page.',
+              sessionId: sid,
+              status: 'no_images',
+            });
+            if (mode === 'single') await closeSession(sid);
+            break;
+          }
+
+          emit('progress', { step: 'download', message: `Found ${btnCount} download button(s), downloading all...` });
+
+          try {
+            const downloadTimeout = parseInt(args.downloadTimeout, 10) || 120000;
+            const downloaded = await downloadViaButtons(page, cdp, {
+              existingButtonCount: 0,
+              timeout: downloadTimeout,
+            });
+
+            const chatUrl = await captureChatUrl(sid, page);
+
+            emit('success', {
+              sessionId: sid,
+              chatUrl,
+              mode,
+              images: downloaded.map(i => i.path),
+            });
+          } catch (e) {
+            emit('error', {
+              message: `Download failed: ${e.message}`,
+              sessionId: sid,
+              status: 'download_failed',
+            });
+          }
+
+          if (mode === 'single') await closeSession(sid);
+          break;
+        }
+
         // generate() handles its own progress events
         const genStartTime = Date.now();
 
diff --git a/skills/gemini-web-generate/scripts/package.json b/skills/gemini-web-generate/scripts/package.json
index bf483a3..2f80029 100644
--- a/skills/gemini-web-generate/scripts/package.json
+++ b/skills/gemini-web-generate/scripts/package.json
@@ -1,14 +1,9 @@
 {
-  "name": "gemini-web-cli",
+  "name": "gemini-web-generate",
   "version": "1.0.0",
-  "description": "CLI tool for AI image generation and session management via Gemini web interface",
+  "description": "Gemini 网页版 AI 生图 CLI — Puppeteer 驱动的全自动生图脚本",
   "type": "module",
   "main": "cli.js",
-  "scripts": {
-    "generate": "node cli.js generate",
-    "download": "node cli.js download",
-    "status": "node cli.js status"
-  },
   "dependencies": {
     "puppeteer-core": "^24.0.0"
   }