fix: doctor status must be honest — show real capability per channel

Before: everything under tier 0 showed ✅ with vague descriptions
After: each channel shows its actual capability and limitations

Changes:
- GitHub: 'Public repos only. Set github_token for private repos'
- Twitter: shows 'Full access' vs 'Read-only' depending on birdx
- Bilibili: ⚠️ warning on servers about potential IP blocks
- XiaoHongShu: friendly message when no cookie (was showing Jina 451)
- Doctor format: tier 0 items now show detailed status messages, not just ✅
- README: platform table updated to match reality (removed exaggerated claims)
- README: doctor example updated to show new honest format

agent_eyes/channels/bilibili.py

@@ -20,6 +20,23 @@ class BilibiliChannel(Channel):
         domain = urlparse(url).netloc.lower()
         return "bilibili.com" in domain or "b23.tv" in domain
 
+    def check(self, config=None):
+        proxy = config.get("bilibili_proxy") if config else None
+        if proxy:
+            return "ok", "Via proxy"
+        # Detect if we're on a server (same logic as cli._detect_environment)
+        import os
+        indicators = [
+            os.path.exists("/var/run/docker.sock"),
+            os.path.exists("/etc/cloud"),
+            "SSH_CONNECTION" in os.environ,
+            "container" in os.environ.get("container", ""),
+        ]
+        is_server = any(indicators)
+        if is_server:
+            return "warn", "May be blocked on servers. Fix: agent-eyes configure proxy URL"
+        return "ok", "Local access"
+
     async def read(self, url: str, config=None) -> ReadResult:
         # Proxy support (Bilibili blocks server IPs)
         proxy = config.get("bilibili_proxy") if config else None

agent_eyes/channels/github.py

@@ -13,7 +13,7 @@ from typing import List
 
 class GitHubChannel(Channel):
     name = "github"
-    description = "GitHub repos, issues, PRs, code"
+    description = "GitHub repos and code"
     backends = ["GitHub API"]
     tier = 0
 
@@ -26,6 +26,12 @@ class GitHubChannel(Channel):
             h["Authorization"] = f"Bearer {token}"
         return h
 
+    def check(self, config=None):
+        token = config.get("github_token") if config else None
+        if token:
+            return "ok", "Full access (authenticated)"
+        return "ok", "Public repos only. Set github_token for private repos + higher rate limits"
+
     def can_handle(self, url: str) -> bool:
         domain = urlparse(url).netloc.lower()
         return "github.com" in domain

agent_eyes/channels/twitter.py

@@ -16,7 +16,7 @@ import requests
 
 class TwitterChannel(Channel):
     name = "twitter"
-    description = "Twitter/X posts, search, timelines"
+    description = "Twitter/X posts"
     backends = ["birdx", "Jina Reader"]
     tier = 0  # Single tweet reading is zero-config
 
@@ -27,7 +27,8 @@ class TwitterChannel(Channel):
     def check(self, config=None):
         # Basic reading always works (Jina fallback)
         if shutil.which("birdx"):
-            return "ok", "birdx (full: search + timeline + threads)"
+            return "ok", "Full access (search + timeline + threads)"
+        return "ok", "Read-only (single tweets via Jina). Install birdx for search + timelines"
         return "ok", "Jina Reader (single tweets only)"
 
     async def read(self, url: str, config=None) -> ReadResult:

agent_eyes/doctor.py

@@ -37,11 +37,13 @@ def format_report(results: Dict[str, dict]) -> str:
     lines.append("")
     lines.append("✅ Ready (no setup needed):")
     for key, r in results.items():
-        if r["tier"] == 0 and r["status"] == "ok":
-            backends = ", ".join(r["backends"]) if r["backends"] else "built-in"
-            lines.append(f"  ✅ {r['name']} [{backends}]")
-        elif r["tier"] == 0 and r["status"] in ("warn", "off"):
-            lines.append(f"  ⚠️  {r['name']} — {r['message']}")
+        if r["tier"] == 0:
+            if r["status"] == "ok":
+                lines.append(f"  ✅ {r['name']} — {r['message']}")
+            elif r["status"] == "warn":
+                lines.append(f"  ⚠️  {r['name']} — {r['message']}")
+            elif r["status"] in ("off", "error"):
+                lines.append(f"  ❌ {r['name']} — {r['message']}")
 
     # Tier 1 — needs free key
     tier1 = {k: r for k, r in results.items() if r["tier"] == 1}