feat: add Weibo channel via mcp-server-weibo (#107)

Adds WeiboChannel integrating qinyuanpei/mcp-server-weibo (34+ stars,
MIT, 10 tools) via mcporter. Addresses #75.

Files changed (3 files, +57 lines):
- agent_reach/channels/weibo.py — new channel (54 lines)
- agent_reach/channels/__init__.py — register WeiboChannel
- tests/test_channel_contracts.py — add weibo URL sample

Co-authored-by: AICodeLion <AICodeLion@users.noreply.github.com>

agent_reach/channels/__init__.py

@@ -20,6 +20,7 @@ from .douyin import DouyinChannel
 from .linkedin import LinkedInChannel
 from .bosszhipin import BossZhipinChannel
 from .wechat import WeChatChannel
+from .weibo import WeiboChannel
 
 
 # Channel registry
@@ -34,6 +35,7 @@ ALL_CHANNELS: List[Channel] = [
     LinkedInChannel(),
     BossZhipinChannel(),
     WeChatChannel(),
+    WeiboChannel(),
     RSSChannel(),
     ExaSearchChannel(),
     WebChannel(),

agent_reach/channels/weibo.py

@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+"""Weibo (微博) — check if mcporter + mcp-server-weibo is available."""
+
+import shutil
+import subprocess
+from .base import Channel
+
+
+class WeiboChannel(Channel):
+    name = "weibo"
+    description = "微博动态与热搜"
+    backends = ["mcp-server-weibo"]
+    tier = 1
+
+    def can_handle(self, url: str) -> bool:
+        from urllib.parse import urlparse
+        d = urlparse(url).netloc.lower()
+        return "weibo.com" in d or "weibo.cn" in d
+
+    def check(self, config=None):
+        mcporter = shutil.which("mcporter")
+        if not mcporter:
+            return "off", (
+                "需要 mcporter + mcp-server-weibo。安装步骤：\n"
+                "  1. npm install -g mcporter\n"
+                "  2. uvx mcp-server-weibo（或 pip install mcp-server-weibo）\n"
+                "  3. mcporter config add weibo --command 'uvx mcp-server-weibo'\n"
+                "  详见 https://github.com/qinyuanpei/mcp-server-weibo"
+            )
+        try:
+            r = subprocess.run(
+                [mcporter, "config", "list"], capture_output=True,
+                encoding="utf-8", errors="replace", timeout=5
+            )
+            if "weibo" not in r.stdout:
+                return "off", (
+                    "mcporter 已装但微博 MCP 未配置。运行：\n"
+                    "  uvx mcp-server-weibo  # 或 pip install mcp-server-weibo\n"
+                    "  mcporter config add weibo --command 'uvx mcp-server-weibo'\n"
+                    "  # 海外服务器需配置 WEIBO_COOKIE 环境变量，\n"
+                    "  # 详见 SKILL.md 微博章节"
+                )
+        except Exception:
+            return "off", "mcporter 连接异常"
+        try:
+            r = subprocess.run(
+                [mcporter, "list", "weibo"], capture_output=True,
+                encoding="utf-8", errors="replace", timeout=15
+            )
+            if r.returncode == 0 and "search_users" in r.stdout:
+                return "ok", "完整可用（热搜、搜索、用户动态、评论）"
+            return "warn", "MCP 已配置但工具加载失败，检查 mcp-server-weibo 版本"
+        except Exception:
+            return "warn", "MCP 连接异常，检查 mcp-server-weibo 是否可用"