精确描述每个渠道的能力层次

核心修改：
- GitHub: 零配置=公开仓库可读可搜，配置 gh/token 后=Fork、Issue、PR、Review 全部可用
- Reddit: 三层能力——Exa 搜索(免费)→代理读帖子→OAuth Bot 高级操作(发帖等)
- 小红书: 必须配 Cookie，没有降级方案，明确说明
- B站: 本地可用/服务器需代理，区分清楚
- Twitter: 零配置可读推文，birdx+Cookie 解锁搜索发推

每个渠道的 check() 方法都改为自定义逻辑，精确反映当前环境的实际能力。

agent_eyes/channels/github.py

@@ -27,10 +27,12 @@ class GitHubChannel(Channel):
         return h
 
     def check(self, config=None):
+        import shutil
         token = config.get("github_token") if config else None
-        if token:
-            return "ok", "已认证，可访问私有仓库"
-        return "ok", "公开仓库可用。配置 github_token 可访问私有仓库"
+        has_gh = shutil.which("gh")
+        if token or has_gh:
+            return "ok", "完整可用（读取、搜索、Fork、Issue、PR 等）"
+        return "ok", "公开仓库可读可搜。配置 gh CLI 或 github_token 可解锁 Fork、Issue、PR 等操作"
 
     def can_handle(self, url: str) -> bool:
         domain = urlparse(url).netloc.lower()

agent_eyes/channels/reddit.py

@@ -5,6 +5,7 @@ Backend: Reddit public JSON API (append .json to any URL)
 Swap to: any Reddit access method
 """
 
+import os
 import requests
 from urllib.parse import urlparse
 from .base import Channel, ReadResult
@@ -14,7 +15,6 @@ class RedditChannel(Channel):
     name = "reddit"
     description = "Reddit 帖子和评论"
     backends = ["Reddit JSON API"]
-    requires_config = ["reddit_proxy"]
     tier = 2
 
     USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36"
@@ -23,6 +23,18 @@ class RedditChannel(Channel):
         domain = urlparse(url).netloc.lower()
         return "reddit.com" in domain or "redd.it" in domain
 
+    def check(self, config=None):
+        proxy = config.get("reddit_proxy") if config else None
+        has_bot = bool(os.environ.get("REDDIT_CLIENT_ID"))
+        if proxy and has_bot:
+            return "ok", "完整可用（代理 + OAuth Bot）"
+        elif proxy:
+            return "ok", "代理已配置，可读取帖子。配置 REDDIT_CLIENT_ID/SECRET 可解锁高级搜索和发帖"
+        elif has_bot:
+            return "warn", "OAuth Bot 已配置，但服务器直连可能被封。配个代理更稳定：agent-eyes configure proxy URL"
+        else:
+            return "off", "搜索用 Exa 免费可用。读帖子需配个代理：agent-eyes configure proxy URL"
+
     async def read(self, url: str, config=None) -> ReadResult:
         proxy = config.get("reddit_proxy") if config else None
         proxies = {"http": proxy, "https": proxy} if proxy else None

agent_eyes/channels/xiaohongshu.py

@@ -16,13 +16,18 @@ class XiaoHongShuChannel(Channel):
     name = "xiaohongshu"
     description = "小红书笔记"
     backends = ["XHS Web API"]
-    requires_config = ["xhs_cookie"]
     tier = 2
 
     def can_handle(self, url: str) -> bool:
         domain = urlparse(url).netloc.lower()
         return "xiaohongshu.com" in domain or "xhslink.com" in domain
 
+    def check(self, config=None):
+        cookie = config.get("xhs_cookie") if config else None
+        if cookie:
+            return "ok", "Cookie 已配置，完整可用"
+        return "off", "需要配置 Cookie 才能访问。导入浏览器 Cookie 即可：agent-eyes configure --from-browser chrome"
+
     async def read(self, url: str, config=None) -> ReadResult:
         cookie = config.get("xhs_cookie") if config else None
 

agent_eyes/doctor.py

@@ -64,14 +64,10 @@ def format_report(results: Dict[str, dict]) -> str:
         for key, r in tier2.items():
             if r["status"] == "ok":
                 lines.append(f"  ✅ {r['name']} — {r['message']}")
+            elif r["status"] == "warn":
+                lines.append(f"  ⚠️  {r['name']} — {r['message']}")
             else:
-                # Friendly message about what to configure
-                if "proxy" in str(r.get("message", "")):
-                    lines.append(f"  ⬜ {r['name']} — 配个代理就能用：agent-eyes configure proxy URL")
-                elif "cookie" in str(r.get("message", "")):
-                    lines.append(f"  ⬜ {r['name']} — 导入浏览器 Cookie 就能用：agent-eyes configure --from-browser chrome")
-                else:
-                    lines.append(f"  ⬜ {r['name']} — {r['message']}")
+                lines.append(f"  ⬜ {r['name']} — {r['message']}")
 
     lines.append("")
     lines.append(f"状态：{ok_count}/{total} 个渠道可用")