feat: add --max-videos argument and wire recommendation flow in main

Douyin.py

@@ -29,6 +29,7 @@ DEFAULT_BROWSER_PORT = 9223
 LISTEN_TARGET = "web/aweme/post/"
 SINGLE_VIDEO_LISTEN_TARGET = "web/aweme/detail/"
 INVALID_FILENAME_CHARS = re.compile(r'[\\/:*?"<>|\r\n\t]')
+RECOMMENDATION_URL_PATTERN = re.compile(r"^https?://www\.douyin\.com/?(?:\?.*)?$")
 CREATOR_URL_PATTERN = re.compile(r"^https?://www\.douyin\.com/user/[^/?#]+(?:\?.*)?$")
 VIDEO_URL_PATTERN = re.compile(r"^https?://www\.douyin\.com/video/(?P<aweme_id>\d+)(?:[/?#].*)?$")
 AWEME_ID_PATTERN = re.compile(r"^\d{5,}$")
@@ -47,6 +48,10 @@ def sanitize_filename(value: str, fallback: str = "untitled") -> str:
     return cleaned or fallback
 
 
+def is_recommendation_url(value: str) -> bool:
+    return bool(RECOMMENDATION_URL_PATTERN.match(value.strip()))
+
+
 def is_creator_url(value: str) -> bool:
     return bool(CREATOR_URL_PATTERN.match(value.strip()))
 
@@ -72,6 +77,8 @@ def build_video_page_url(aweme_id: str) -> str:
 
 def parse_target_input(value: str, source: str) -> ResolvedTarget:
     normalized = value.strip()
+    if is_recommendation_url(normalized):
+        return ResolvedTarget(kind="recommendation", value=normalized, source=source)
     if is_creator_url(normalized):
         return ResolvedTarget(kind="creator", value=normalized, source=source)
     if is_video_url(normalized):
@@ -131,9 +138,19 @@ def choose_video_url(url_list: list[str]) -> str:
     raise ValueError("url_list 为空，无法选择视频地址。")
 
 
-def build_output_path(title: str, video_id: str, output_dir: Path = Path("video")) -> Path:
+def build_output_path(
+    title: str, 
+    video_id: str, 
+    output_dir: Path = Path("video"),
+    author_name: str | None = None,
+) -> Path:
     safe_title = sanitize_filename(title, fallback="untitled")
-    return output_dir / f"{safe_title}-{video_id}.mp4"
+    if author_name:
+        safe_author = sanitize_filename(author_name, fallback="unknown")
+        filename = f"[{safe_author}]{safe_title}-{video_id}.mp4"
+    else:
+        filename = f"{safe_title}-{video_id}.mp4"
+    return output_dir / filename
 
 
 def build_browser_address(browser_port: int | None) -> str | None:
@@ -192,11 +209,18 @@ def parse_aweme_items(body: Any) -> list[dict[str, str]]:
             continue
 
         title = str(aweme.get("desc") or "").strip() or "untitled"
+        
+        author = aweme.get("author") or {}
+        author_name = str(author.get("nickname") or "").strip() or "unknown"
+        author_id = str(author.get("uid") or "").strip() or "unknown"
+        
         items.append(
             {
                 "title": title,
                 "video_id": video_id,
                 "video_url": choose_video_url([str(url) for url in url_list]),
+                "author_name": author_name,
+                "author_id": author_id,
             }
         )
 
@@ -363,6 +387,99 @@ def collect_videos(
     return downloaded
 
 
+def collect_recommendations(
+    max_videos: int,
+    timeout: int,
+    output_dir: Path,
+    browser_port: int | None,
+) -> int:
+    requests_module, chromium_page_cls, chromium_options_cls = import_runtime_dependencies()
+    headers = build_headers("https://www.douyin.com/")
+    if browser_port is not None:
+        ensure_browser_debug_port_ready(browser_port)
+    page = create_page(chromium_page_cls, chromium_options_cls, browser_port)
+    page.listen.start(LISTEN_TARGET)
+
+    print("[INFO] 正在打开抖音推荐流。若出现登录或验证码，请先在浏览器窗口里完成。")
+    page.get("https://www.douyin.com/")
+    time.sleep(3)
+
+    downloaded = 0
+    seen_ids: set[str] = set()
+    consecutive_empty = 0
+    max_consecutive_empty = 3
+
+    while downloaded < max_videos:
+        packet = wait_for_aweme_packet(page, timeout=timeout)
+        if packet is None:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                print("[INFO] 连续多次未获取到新数据，结束抓取。")
+                break
+            scroll_to_next_page(page)
+            continue
+
+        try:
+            payload = extract_aweme_payload(packet.response)
+            items = parse_aweme_items(payload)
+        except Exception as exc:
+            print(f"[WARN] 解析接口数据失败: {exc}")
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+            scroll_to_next_page(page)
+            continue
+
+        if not items:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+            scroll_to_next_page(page)
+            continue
+
+        consecutive_empty = 0
+        new_items_in_batch = 0
+        
+        for item in items:
+            if item["video_id"] in seen_ids:
+                continue
+            
+            if downloaded >= max_videos:
+                break
+
+            seen_ids.add(item["video_id"])
+            output_path = build_output_path(
+                title=item["title"],
+                video_id=item["video_id"],
+                output_dir=output_dir,
+                author_name=item.get("author_name"),
+            )
+
+            try:
+                download_video(
+                    requests_module=requests_module,
+                    headers=headers,
+                    video_url=item["video_url"],
+                    output_path=output_path,
+                )
+            except Exception as exc:
+                print(f"[WARN] 下载失败 {item['video_id']}: {exc}")
+                continue
+
+            downloaded += 1
+            new_items_in_batch += 1
+            print(f"[OK] 已保存: {output_path}")
+
+        if new_items_in_batch == 0:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+
+        scroll_to_next_page(page)
+
+    return downloaded
+
+
 def collect_single_video(
     target: ResolvedTarget,
     timeout: int,
@@ -430,6 +547,12 @@ def build_parser() -> argparse.ArgumentParser:
         default=DEFAULT_BROWSER_PORT,
         help="附着到已启动 Chrome 的调试端口，默认 9223",
     )
+    parser.add_argument(
+        "--max-videos",
+        type=int,
+        default=50,
+        help="推荐流最大抓取数量，默认 50",
+    )
     return parser
 
 
@@ -443,6 +566,8 @@ def main(argv: list[str] | None = None) -> int:
         parser.error("--timeout 必须大于 0")
     if args.browser_port is not None and args.browser_port <= 0:
         parser.error("--browser-port 必须大于 0")
+    if args.max_videos <= 0:
+        parser.error("--max-videos 必须大于 0")
 
     try:
         target = resolve_cli_target(args.target, browser_port=args.browser_port)
@@ -455,6 +580,13 @@ def main(argv: list[str] | None = None) -> int:
                 browser_port=args.browser_port,
                 auto_scroll=args.pages > 1,
             )
+        elif target.kind == "recommendation":
+            total = collect_recommendations(
+                max_videos=args.max_videos,
+                timeout=args.timeout,
+                output_dir=Path(args.output_dir),
+                browser_port=args.browser_port,
+            )
         elif target.kind == "single-video":
             total = collect_single_video(
                 target=target,

docs/superpowers/plans/2026-05-06-douyin-recommendation-crawling.md

@@ -0,0 +1,584 @@
+# 抖音推荐流视频抓取实现计划
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** 扩展 Douyin.py 支持抓取抖音推荐流（For You页面）视频，记录博主信息，支持滚动加载最多50条
+
+**Architecture:** 新建 `collect_recommendations()` 函数处理推荐流，复用现有的下载和工具函数。通过 `parse_target_input()` 扩展识别推荐流URL。
+
+**Tech Stack:** Python 3, DrissionPage, requests, unittest
+
+---
+
+## 文件结构
+
+| 文件 | 操作 | 说明 |
+|------|------|------|
+| `Douyin.py` | 修改 | 添加推荐流识别、解析、抓取逻辑 |
+| `test_douyin.py` | 修改 | 添加推荐流相关测试 |
+
+---
+
+## Task 1: 推荐流URL识别
+
+**Files:**
+- Modify: `Douyin.py:17-19`（添加正则表达式）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_is_recommendation_url_accepts_douyin_homepage(self) -> None:
+    module = importlib.import_module("Douyin")
+    self.assertTrue(module.is_recommendation_url("https://www.douyin.com/"))
+    self.assertTrue(module.is_recommendation_url("https://www.douyin.com"))
+    self.assertTrue(module.is_recommendation_url("https://www.douyin.com/?from=web"))
+    self.assertFalse(module.is_recommendation_url("https://www.douyin.com/user/xxx"))
+    self.assertFalse(module.is_recommendation_url("https://www.douyin.com/video/123"))
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_is_recommendation_url_accepts_douyin_homepage -v`
+Expected: FAIL with "module has no attribute 'is_recommendation_url'"
+
+- [ ] **Step 3: 实现最小代码**
+
+在 `Douyin.py` 中添加：
+```python
+RECOMMENDATION_URL_PATTERN = re.compile(r"^https?://www\.douyin\.com/?(?:\?.*)?$")
+
+def is_recommendation_url(value: str) -> bool:
+    return bool(RECOMMENDATION_URL_PATTERN.match(value.strip()))
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_is_recommendation_url_accepts_douyin_homepage -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: add recommendation URL recognition"
+```
+
+---
+
+## Task 2: 扩展目标解析支持推荐流
+
+**Files:**
+- Modify: `Douyin.py:52-68`（修改 `parse_target_input`）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_parse_target_input_classifies_recommendation_url(self) -> None:
+    module = importlib.import_module("Douyin")
+    target = module.parse_target_input("https://www.douyin.com/", source="manual")
+    self.assertEqual(target.kind, "recommendation")
+    self.assertEqual(target.value, "https://www.douyin.com/")
+    self.assertEqual(target.source, "manual")
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_parse_target_input_classifies_recommendation_url -v`
+Expected: FAIL with "不支持的目标"
+
+- [ ] **Step 3: 修改 `parse_target_input`**
+
+```python
+def parse_target_input(value: str, source: str) -> ResolvedTarget:
+    normalized = value.strip()
+    if is_recommendation_url(normalized):
+        return ResolvedTarget(kind="recommendation", value=normalized, source=source)
+    if is_creator_url(normalized):
+        return ResolvedTarget(kind="creator", value=normalized, source=source)
+    # ... 其余保持不变
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_parse_target_input_classifies_recommendation_url -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: extend target parsing to support recommendation URLs"
+```
+
+---
+
+## Task 3: 增强数据解析提取博主信息
+
+**Files:**
+- Modify: `Douyin.py:140-170`（修改 `parse_aweme_items`）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_parse_aweme_items_extracts_author_info(self) -> None:
+    module = importlib.import_module("Douyin")
+    payload = {
+        "aweme_list": [
+            {
+                "aweme_id": "7619989983668240802",
+                "desc": "测试视频",
+                "author": {
+                    "nickname": "测试博主",
+                    "uid": "123456789"
+                },
+                "video": {
+                    "play_addr": {
+                        "url_list": ["https://v26-web.douyinvod.com/example/video.mp4"]
+                    }
+                },
+            }
+        ]
+    }
+    items = module.parse_aweme_items(payload)
+    self.assertEqual(len(items), 1)
+    self.assertEqual(items[0]["author_name"], "测试博主")
+    self.assertEqual(items[0]["author_id"], "123456789")
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_parse_aweme_items_extracts_author_info -v`
+Expected: FAIL with KeyError or missing author_name
+
+- [ ] **Step 3: 修改 `parse_aweme_items`**
+
+```python
+def parse_aweme_items(body: Any) -> list[dict[str, str]]:
+    # ... 现有代码 ...
+    
+    for aweme in aweme_list:
+        # ... 现有视频提取代码 ...
+        
+        author = aweme.get("author") or {}
+        author_name = str(author.get("nickname") or "").strip() or "unknown"
+        author_id = str(author.get("uid") or "").strip() or "unknown"
+        
+        items.append(
+            {
+                "title": title,
+                "video_id": video_id,
+                "video_url": choose_video_url([str(url) for url in url_list]),
+                "author_name": author_name,
+                "author_id": author_id,
+            }
+        )
+    
+    return items
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_parse_aweme_items_extracts_author_info -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: extract author info from aweme items"
+```
+
+---
+
+## Task 4: 支持带博主信息的文件名构建
+
+**Files:**
+- Modify: `Douyin.py:102-104`（修改 `build_output_path`）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_build_output_path_with_author_uses_bracket_format(self) -> None:
+    module = importlib.import_module("Douyin")
+    output_path = module.build_output_path(
+        title="测试标题", 
+        video_id="123456",
+        author_name="测试博主"
+    )
+    self.assertEqual(output_path.as_posix(), "video/[测试博主]测试标题-123456.mp4")
+
+def test_build_output_path_without_author_uses_original_format(self) -> None:
+    module = importlib.import_module("Douyin")
+    output_path = module.build_output_path("测试标题", "123456")
+    self.assertEqual(output_path.as_posix(), "video/测试标题-123456.mp4")
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_build_output_path_with_author_uses_bracket_format -v`
+Expected: FAIL with unexpected keyword argument 'author_name'
+
+- [ ] **Step 3: 修改 `build_output_path`**
+
+```python
+def build_output_path(
+    title: str, 
+    video_id: str, 
+    output_dir: Path = Path("video"),
+    author_name: str | None = None,
+) -> Path:
+    safe_title = sanitize_filename(title, fallback="untitled")
+    if author_name:
+        safe_author = sanitize_filename(author_name, fallback="unknown")
+        filename = f"[{safe_author}]{safe_title}-{video_id}.mp4"
+    else:
+        filename = f"{safe_title}-{video_id}.mp4"
+    return output_dir / filename
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_build_output_path_with_author_uses_bracket_format test_douyin.py::DouyinModuleTests::test_build_output_path_without_author_uses_original_format -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: support author prefix in output filename"
+```
+
+---
+
+## Task 5: 实现 `collect_recommendations()` 函数
+
+**Files:**
+- Modify: `Douyin.py`（添加新函数）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_collect_recommendations_downloads_videos_with_author_prefix(self) -> None:
+    module = importlib.import_module("Douyin")
+    packet = FakePacket(
+        {
+            "aweme_list": [
+                {
+                    "aweme_id": "7619989983668240802",
+                    "desc": "推荐视频1",
+                    "author": {"nickname": "博主A", "uid": "111"},
+                    "video": {
+                        "play_addr": {
+                            "url_list": ["https://v26-web.douyinvod.com/example/video1.mp4"]
+                        }
+                    },
+                }
+            ]
+        }
+    )
+    page = FakeRuntimePage("https://www.douyin.com/", packet)
+    
+    with mock.patch.object(module, "import_runtime_dependencies", return_value=(object(), object(), object())):
+        with mock.patch.object(module, "create_page", return_value=page):
+            with mock.patch.object(module, "download_video") as mocked_download:
+                downloaded = module.collect_recommendations(
+                    max_videos=50,
+                    timeout=10,
+                    output_dir=module.Path("video"),
+                    browser_port=None,
+                )
+    
+    self.assertEqual(downloaded, 1)
+    # 验证文件名包含博主前缀
+    call_kwargs = mocked_download.call_args[1]
+    self.assertIn("[博主A]", str(call_kwargs["output_path"]))
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_collect_recommendations_downloads_videos_with_author_prefix -v`
+Expected: FAIL with "module has no attribute 'collect_recommendations'"
+
+- [ ] **Step 3: 实现 `collect_recommendations`**
+
+```python
+def collect_recommendations(
+    max_videos: int,
+    timeout: int,
+    output_dir: Path,
+    browser_port: int | None,
+) -> int:
+    requests_module, chromium_page_cls, chromium_options_cls = import_runtime_dependencies()
+    headers = build_headers("https://www.douyin.com/")
+    if browser_port is not None:
+        ensure_browser_debug_port_ready(browser_port)
+    page = create_page(chromium_page_cls, chromium_options_cls, browser_port)
+    page.listen.start(LISTEN_TARGET)
+
+    print("[INFO] 正在打开抖音推荐流。若出现登录或验证码，请先在浏览器窗口里完成。")
+    page.get("https://www.douyin.com/")
+    time.sleep(3)
+
+    downloaded = 0
+    seen_ids: set[str] = set()
+    consecutive_empty = 0
+    max_consecutive_empty = 3
+
+    while downloaded < max_videos:
+        packet = wait_for_aweme_packet(page, timeout=timeout)
+        if packet is None:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                print("[INFO] 连续多次未获取到新数据，结束抓取。")
+                break
+            scroll_to_next_page(page)
+            continue
+
+        try:
+            payload = extract_aweme_payload(packet.response)
+            items = parse_aweme_items(payload)
+        except Exception as exc:
+            print(f"[WARN] 解析接口数据失败: {exc}")
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+            scroll_to_next_page(page)
+            continue
+
+        if not items:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+            scroll_to_next_page(page)
+            continue
+
+        consecutive_empty = 0
+        new_items_in_batch = 0
+        
+        for item in items:
+            if item["video_id"] in seen_ids:
+                continue
+            
+            if downloaded >= max_videos:
+                break
+
+            seen_ids.add(item["video_id"])
+            output_path = build_output_path(
+                title=item["title"],
+                video_id=item["video_id"],
+                output_dir=output_dir,
+                author_name=item.get("author_name"),
+            )
+
+            try:
+                download_video(
+                    requests_module=requests_module,
+                    headers=headers,
+                    video_url=item["video_url"],
+                    output_path=output_path,
+                )
+            except Exception as exc:
+                print(f"[WARN] 下载失败 {item['video_id']}: {exc}")
+                continue
+
+            downloaded += 1
+            new_items_in_batch += 1
+            print(f"[OK] 已保存: {output_path}")
+
+        if new_items_in_batch == 0:
+            consecutive_empty += 1
+            if consecutive_empty >= max_consecutive_empty:
+                break
+
+        scroll_to_next_page(page)
+
+    return downloaded
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_collect_recommendations_downloads_videos_with_author_prefix -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: implement collect_recommendations() for For You page"
+```
+
+---
+
+## Task 6: 添加 `--max-videos` 命令行参数
+
+**Files:**
+- Modify: `Douyin.py:295-305`（修改 `build_parser`）
+- Modify: `Douyin.py:310-350`（修改 `main`）
+- Test: `test_douyin.py`（添加测试）
+
+- [ ] **Step 1: 编写失败测试**
+
+```python
+def test_build_parser_has_max_videos_argument(self) -> None:
+    module = importlib.import_module("Douyin")
+    args = module.build_parser().parse_args(["--max-videos", "30"])
+    self.assertEqual(args.max_videos, 30)
+
+def test_main_dispatches_recommendation_flow_for_recommendation_url(self) -> None:
+    module = importlib.import_module("Douyin")
+    stdout = io.StringIO()
+    recommendation_target = module.ResolvedTarget(
+        kind="recommendation",
+        value="https://www.douyin.com/",
+        source="current-page",
+    )
+    with redirect_stdout(stdout):
+        with mock.patch.object(module, "resolve_cli_target", return_value=recommendation_target):
+            with mock.patch.object(module, "collect_recommendations", return_value=5) as mocked_collect:
+                exit_code = module.main([])
+    self.assertEqual(exit_code, 0)
+    mocked_collect.assert_called_once_with(
+        max_videos=50,
+        timeout=10,
+        output_dir=module.Path("video"),
+        browser_port=9223,
+    )
+```
+
+- [ ] **Step 2: 运行测试确认失败**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_build_parser_has_max_videos_argument -v`
+Expected: FAIL with "unrecognized arguments: --max-videos"
+
+- [ ] **Step 3: 修改 `build_parser` 和 `main`**
+
+```python
+def build_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(description="附着抖音登录浏览器并下载当前页面或指定目标的视频")
+    parser.add_argument(
+        "target",
+        nargs="?",
+        default=None,
+        help="可选：博主主页 URL、单视频 URL 或 aweme_id；不传则读取当前浏览器页面",
+    )
+    parser.add_argument("--pages", type=int, default=1, help="创作者抓取最多处理多少页；默认 1")
+    parser.add_argument("--timeout", type=int, default=10, help="单次等待接口响应秒数，默认 10")
+    parser.add_argument(
+        "--output-dir",
+        default="video",
+        help="视频输出目录，默认 video",
+    )
+    parser.add_argument(
+        "--browser-port",
+        type=int,
+        default=DEFAULT_BROWSER_PORT,
+        help="附着到已启动 Chrome 的调试端口，默认 9223",
+    )
+    parser.add_argument(
+        "--max-videos",
+        type=int,
+        default=50,
+        help="推荐流最大抓取数量，默认 50",
+    )
+    return parser
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = build_parser()
+    args = parser.parse_args(argv)
+
+    if args.pages <= 0:
+        parser.error("--pages 必须大于 0")
+    if args.timeout <= 0:
+        parser.error("--timeout 必须大于 0")
+    if args.browser_port is not None and args.browser_port <= 0:
+        parser.error("--browser-port 必须大于 0")
+    if args.max_videos <= 0:
+        parser.error("--max-videos 必须大于 0")
+
+    try:
+        target = resolve_cli_target(args.target, browser_port=args.browser_port)
+        if target.kind == "creator":
+            total = collect_videos(
+                user_url=target.value,
+                max_pages=args.pages,
+                timeout=args.timeout,
+                output_dir=Path(args.output_dir),
+                browser_port=args.browser_port,
+                auto_scroll=args.pages > 1,
+            )
+        elif target.kind == "recommendation":
+            total = collect_recommendations(
+                max_videos=args.max_videos,
+                timeout=args.timeout,
+                output_dir=Path(args.output_dir),
+                browser_port=args.browser_port,
+            )
+        elif target.kind == "single-video":
+            total = collect_single_video(
+                target=target,
+                timeout=args.timeout,
+                output_dir=Path(args.output_dir),
+                browser_port=args.browser_port,
+            )
+        else:
+            raise RuntimeError(f"不支持的目标类型: {target.kind}")
+    except RuntimeError as exc:
+        print(f"[ERROR] {exc}")
+        return 1
+    except KeyboardInterrupt:
+        print("\n[INFO] 用户中断。")
+        return 130
+
+    print(f"[INFO] 处理结束，共下载 {total} 个视频。")
+    return 0
+```
+
+- [ ] **Step 4: 运行测试确认通过**
+
+Run: `python3 -m pytest test_douyin.py::DouyinModuleTests::test_build_parser_has_max_videos_argument test_douyin.py::DouyinModuleTests::test_main_dispatches_recommendation_flow_for_recommendation_url -v`
+Expected: PASS
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add Douyin.py test_douyin.py
+git commit -m "feat: add --max-videos argument and wire recommendation flow in main"
+```
+
+---
+
+## Task 7: 运行全部测试并验证
+
+- [ ] **Step 1: 运行全部测试**
+
+Run: `python3 -m pytest test_douyin.py -v`
+Expected: 所有测试通过
+
+- [ ] **Step 2: 运行主脚本帮助确认**
+
+Run: `python3 Douyin.py --help`
+Expected: 显示包含 `--max-videos` 的帮助信息
+
+- [ ] **Step 3: 提交**
+
+```bash
+git add -A
+git commit -m "test: verify all tests pass for recommendation crawling feature"
+```
+
+---
+
+## 完成标准
+
+1. ✅ `Douyin.py` 支持识别 `https://www.douyin.com/` 为推荐流目标
+2. ✅ `collect_recommendations()` 函数实现滚动加载、最多50条、去重
+3. ✅ 视频文件名包含博主昵称：`[博主名]标题-aweme_id.mp4`
+4. ✅ `--max-videos` 命令行参数可用
+5. ✅ 所有现有测试继续通过
+6. ✅ 新增测试覆盖推荐流功能

docs/superpowers/specs/2026-05-06-douyin-recommendation-crawling-design.md

@@ -0,0 +1,165 @@
+# 抖音推荐流视频抓取设计文档
+
+## 背景
+
+当前系统支持抓取指定博主主页或单视频。现需扩展支持抓取抖音推荐流（For You页面）当前可见的视频。
+
+## 目标
+
+- 支持抓取抖音推荐流（`https://www.douyin.com/`）的视频
+- 记录每个视频对应的博主信息
+- 支持滚动加载，最多抓取50条
+- 视频统一保存到 `video/` 目录
+- 保持现有两步式工作流不变
+
+## 方案选择
+
+采用**方案B：新建推荐流专用抓取函数**
+
+理由：
+- 逻辑清晰，推荐流和博主页完全解耦
+- 便于后续分别维护
+- 工作量适中，可快速实现验证
+
+## 详细设计
+
+### 1. 目标识别扩展
+
+新增推荐流URL识别模式：
+
+```python
+RECOMMENDATION_URL_PATTERN = re.compile(
+    r"^https?://www\.douyin\.com/?(?:\?.*)?$"
+)
+```
+
+目标类型扩展为三种：
+- `creator` - 博主主页（现有）
+- `single-video` - 单视频（现有）
+- `recommendation` - 推荐流（新增）
+
+### 2. 核心流程
+
+```
+用户执行 ./.venv/bin/python Douyin.py
+    ↓
+读取当前浏览器页面URL
+    ↓
+判断页面类型：
+    - 推荐流 → 执行 collect_recommendations()
+    - 博主页 → 执行 collect_videos()（现有）
+    - 单视频 → 执行 collect_single_video()（现有）
+    - 其他 → 报错提示
+```
+
+### 3. collect_recommendations() 函数
+
+**参数：**
+- `max_videos`: 最大抓取数量（默认50）
+- `timeout`: 单次等待接口响应秒数（默认10）
+- `output_dir`: 输出目录（默认 `video/`）
+- `browser_port`: 浏览器调试端口（默认9223）
+
+**行为：**
+1. 通过 `page.get("https://www.douyin.com/")` 打开推荐流页面（复用现有页面打开逻辑，不切换标签页）
+2. 启动监听，目标接口：`web/aweme/post/`（推荐流与博主页共用此接口）
+3. 循环直到收集够 `max_videos` 条或无法继续加载：
+   - 等待接口响应
+   - 解析视频列表，提取：标题、视频ID、视频URL、博主信息
+   - 过滤已下载（按 `video_id` 去重，使用 `seen_ids: set[str]` 集合）
+   - 下载视频
+   - 向下滚动加载更多
+4. 返回实际下载数量
+
+### 4. 数据解析增强
+
+新增博主信息提取字段：
+
+```python
+{
+    "title": "视频标题",
+    "video_id": "aweme_id",
+    "video_url": "下载链接",
+    "author_name": "博主昵称",
+    "author_id": "博主ID",
+}
+```
+
+### 5. 文件名格式
+
+**推荐流视频：**
+```
+[博主昵称]视频标题-aweme_id.mp4
+```
+示例：`[张三]搞笑视频-7619989983668240802.mp4`
+
+**博主页视频（保持现有）：**
+```
+视频标题-aweme_id.mp4
+```
+
+### 6. 命令行参数
+
+**新增参数：**
+```bash
+--max-videos 50    # 推荐流最大抓取数量（默认50）
+```
+
+**使用示例：**
+```bash
+# 零参数，自动识别当前页面
+./.venv/bin/python Douyin.py
+
+# 自定义抓取数量（仅对推荐流有效）
+./.venv/bin/python Douyin.py --max-videos 30
+
+# 显式传入URL时，--max-videos 不适用（博主页和单视频页忽略此参数）
+./.venv/bin/python Douyin.py "https://www.douyin.com/user/xxx"
+```
+
+### 7. 错误处理
+
+- **推荐流页面未加载数据**：提示用户先滚动加载内容
+- **滚动后无新数据**：正常结束，返回已下载数量
+- **达到最大数量**：正常结束
+- **其他错误**：复用现有错误处理机制
+
+### 8. 测试覆盖（TDD）
+
+必须覆盖以下测试场景：
+
+- [ ] 推荐流URL识别测试
+- [ ] 推荐流页面解析测试（模拟API响应含博主信息）
+- [ ] 滚动加载逻辑测试
+- [ ] 最大数量限制测试
+- [ ] 文件名构建测试（含博主名）
+- [ ] 博主信息提取测试
+- [ ] 去重逻辑测试
+
+## 非目标
+
+- 自动登录抖音
+- 自动过验证码
+- 抓取非推荐流页面（如话题页、搜索页）
+- 自动筛选视频内容
+- 抓取超过50条视频（如需更多，需用户手动调整参数）
+
+## 验收标准
+
+1. 用户可以在推荐流页面执行 `./.venv/bin/python Douyin.py` 抓取视频
+2. 系统能自动识别当前页面是推荐流
+3. 支持滚动加载，最多抓取50条
+4. 文件名包含博主昵称
+5. 所有测试通过
+6. 关键失败场景有明确报错
+
+## 实现步骤
+
+1. 编写测试（TDD）
+2. 实现推荐流URL识别
+3. 实现 `collect_recommendations()` 函数
+4. 增强数据解析（提取博主信息）
+5. 修改文件名构建逻辑
+6. 更新命令行参数
+7. 运行全部测试
+8. 提交代码

test_douyin.py

@@ -31,12 +31,16 @@ class FakeListener:
     def __init__(self, packet):
         self.packet = packet
         self.started_targets = []
+        self.call_count = 0
 
     def start(self, target):
         self.started_targets.append(target)
 
     def wait(self, timeout):
-        return self.packet
+        self.call_count += 1
+        if self.call_count == 1:
+            return self.packet
+        return None
 
 
 class FakeRuntimePage:
@@ -82,6 +86,15 @@ class DouyinModuleTests(unittest.TestCase):
         output_path = module.build_output_path("测试标题", "123456")
         self.assertEqual(output_path.as_posix(), "video/测试标题-123456.mp4")
 
+    def test_build_output_path_with_author_uses_bracket_format(self) -> None:
+        module = importlib.import_module("Douyin")
+        output_path = module.build_output_path(
+            title="测试标题", 
+            video_id="123456",
+            author_name="测试博主"
+        )
+        self.assertEqual(output_path.as_posix(), "video/[测试博主]测试标题-123456.mp4")
+
     def test_extract_aweme_payload_uses_dict_body(self) -> None:
         module = importlib.import_module("Douyin")
         response = FakeResponse({"aweme_list": []}, "")
@@ -115,6 +128,14 @@ class DouyinModuleTests(unittest.TestCase):
             with self.assertRaisesRegex(RuntimeError, "login_douyin.py"):
                 module.ensure_browser_debug_port_ready(9223)
 
+    def test_is_recommendation_url_accepts_douyin_homepage(self) -> None:
+        module = importlib.import_module("Douyin")
+        self.assertTrue(module.is_recommendation_url("https://www.douyin.com/"))
+        self.assertTrue(module.is_recommendation_url("https://www.douyin.com"))
+        self.assertTrue(module.is_recommendation_url("https://www.douyin.com/?from=web"))
+        self.assertFalse(module.is_recommendation_url("https://www.douyin.com/user/xxx"))
+        self.assertFalse(module.is_recommendation_url("https://www.douyin.com/video/123"))
+
     def test_is_creator_url_accepts_supported_douyin_creator_url(self) -> None:
         module = importlib.import_module("Douyin")
         self.assertTrue(
@@ -136,6 +157,13 @@ class DouyinModuleTests(unittest.TestCase):
         self.assertTrue(module.is_aweme_id("7619989983668240802"))
         self.assertFalse(module.is_aweme_id("not-an-aweme-id"))
 
+    def test_parse_target_input_classifies_recommendation_url(self) -> None:
+        module = importlib.import_module("Douyin")
+        target = module.parse_target_input("https://www.douyin.com/", source="manual")
+        self.assertEqual(target.kind, "recommendation")
+        self.assertEqual(target.value, "https://www.douyin.com/")
+        self.assertEqual(target.source, "manual")
+
     def test_parse_target_input_classifies_creator_url(self) -> None:
         module = importlib.import_module("Douyin")
         target = module.parse_target_input(
@@ -239,6 +267,30 @@ class DouyinModuleTests(unittest.TestCase):
                             browser_port=None,
                         )
 
+    def test_parse_aweme_items_extracts_author_info(self) -> None:
+        module = importlib.import_module("Douyin")
+        payload = {
+            "aweme_list": [
+                {
+                    "aweme_id": "7619989983668240802",
+                    "desc": "测试视频",
+                    "author": {
+                        "nickname": "测试博主",
+                        "uid": "123456789"
+                    },
+                    "video": {
+                        "play_addr": {
+                            "url_list": ["https://v26-web.douyinvod.com/example/video.mp4"]
+                        }
+                    },
+                }
+            ]
+        }
+        items = module.parse_aweme_items(payload)
+        self.assertEqual(len(items), 1)
+        self.assertEqual(items[0]["author_name"], "测试博主")
+        self.assertEqual(items[0]["author_id"], "123456789")
+
     def test_build_video_page_url_uses_aweme_id(self) -> None:
         module = importlib.import_module("Douyin")
         self.assertEqual(
@@ -246,6 +298,42 @@ class DouyinModuleTests(unittest.TestCase):
             "https://www.douyin.com/video/7619989983668240802",
         )
 
+    def test_collect_recommendations_downloads_videos_with_author_prefix(self) -> None:
+        module = importlib.import_module("Douyin")
+        packet = FakePacket(
+            {
+                "aweme_list": [
+                    {
+                        "aweme_id": "7619989983668240802",
+                        "desc": "推荐视频1",
+                        "author": {"nickname": "博主A", "uid": "111"},
+                        "video": {
+                            "play_addr": {
+                                "url_list": ["https://v26-web.douyinvod.com/example/video1.mp4"]
+                            }
+                        },
+                    }
+                ]
+            }
+        )
+        page = FakeRuntimePage("https://www.douyin.com/", packet)
+        
+        with mock.patch.object(module, "import_runtime_dependencies", return_value=(object(), object(), object())):
+            with mock.patch.object(module, "create_page", return_value=page):
+                with mock.patch.object(module, "download_video") as mocked_download:
+                    with mock.patch.object(module, "scroll_to_next_page"):
+                        downloaded = module.collect_recommendations(
+                            max_videos=50,
+                            timeout=10,
+                            output_dir=module.Path("video"),
+                            browser_port=None,
+                        )
+        
+        self.assertEqual(downloaded, 1)
+        # 验证文件名包含博主前缀
+        call_kwargs = mocked_download.call_args[1]
+        self.assertIn("[博主A]", str(call_kwargs["output_path"]))
+
     def test_collect_single_video_downloads_exactly_one_file_for_video_url_target(self) -> None:
         module = importlib.import_module("Douyin")
         packet = FakePacket(
@@ -316,6 +404,11 @@ class DouyinModuleTests(unittest.TestCase):
         self.assertEqual(page.visited_urls, ["https://www.douyin.com/video/7619989983668240802"])
         mocked_download.assert_called_once()
 
+    def test_build_parser_has_max_videos_argument(self) -> None:
+        module = importlib.import_module("Douyin")
+        args = module.build_parser().parse_args(["--max-videos", "30"])
+        self.assertEqual(args.max_videos, 30)
+
     def test_build_parser_defaults_to_zero_argument_current_page_flow(self) -> None:
         module = importlib.import_module("Douyin")
         args = module.build_parser().parse_args([])
@@ -331,6 +424,26 @@ class DouyinModuleTests(unittest.TestCase):
         self.assertEqual(target.aweme_id, "7619989983668240802")
         mocked_imports.assert_not_called()
 
+    def test_main_dispatches_recommendation_flow_for_recommendation_url(self) -> None:
+        module = importlib.import_module("Douyin")
+        stdout = io.StringIO()
+        recommendation_target = module.ResolvedTarget(
+            kind="recommendation",
+            value="https://www.douyin.com/",
+            source="current-page",
+        )
+        with redirect_stdout(stdout):
+            with mock.patch.object(module, "resolve_cli_target", return_value=recommendation_target):
+                with mock.patch.object(module, "collect_recommendations", return_value=5) as mocked_collect:
+                    exit_code = module.main([])
+        self.assertEqual(exit_code, 0)
+        mocked_collect.assert_called_once_with(
+            max_videos=50,
+            timeout=10,
+            output_dir=module.Path("video"),
+            browser_port=9223,
+        )
+
     def test_main_without_target_dispatches_current_page_creator_flow(self) -> None:
         module = importlib.import_module("Douyin")
         stdout = io.StringIO()