feat(gateway): add WeChat QR setup flow

agent/prompt_builder.py

@@ -256,6 +256,14 @@ def _strip_yaml_frontmatter(content: str) -> str:
         "only — no markdown, no formatting. SMS messages are limited to ~1600 "
         "characters, so be brief and direct."
     ),
+    "weixin": (
+        "You are on WeChat (Weixin), a Chinese messaging platform. "
+        "Messages are plain text only — markdown is NOT rendered. "
+        "Keep responses concise. You can send images, videos, and files as "
+        "native attachments. Voice messages may arrive as speech-to-text "
+        "transcriptions. Do not use markdown formatting like **bold** or "
+        "`code` — use plain text."
+    ),
 }
 
 CONTEXT_FILE_MAX_CHARS = 20_000

cron/scheduler.py

@@ -162,6 +162,7 @@ def _deliver_result(job: dict, content: str) -> None:
         "mattermost": Platform.MATTERMOST,
         "homeassistant": Platform.HOMEASSISTANT,
         "dingtalk": Platform.DINGTALK,
+        "weixin": Platform.WEIXIN,
         "feishu": Platform.FEISHU,
         "wecom": Platform.WECOM,
         "email": Platform.EMAIL,

gateway/channel_directory.py

@@ -62,7 +62,7 @@ def build_channel_directory(adapters: Dict[Any, Any]) -> Dict[str, Any]:
             logger.warning("Channel directory: failed to build %s: %s", platform.value, e)
 
     # Telegram, WhatsApp & Signal can't enumerate chats -- pull from session history
-    for plat_name in ("telegram", "whatsapp", "signal", "email", "sms"):
+    for plat_name in ("telegram", "whatsapp", "signal", "weixin", "email", "sms"):
         if plat_name not in platforms:
             platforms[plat_name] = _build_from_sessions(plat_name)
 

gateway/config.py

@@ -62,6 +62,7 @@ class Platform(Enum):
     EMAIL = "email"
     SMS = "sms"
     DINGTALK = "dingtalk"
+    WEIXIN = "weixin"
     API_SERVER = "api_server"
     WEBHOOK = "webhook"
     FEISHU = "feishu"
@@ -262,6 +263,11 @@ def get_connected_platforms(self) -> List[Platform]:
         for platform, config in self.platforms.items():
             if not config.enabled:
                 continue
+            # Weixin needs both token and account_id from QR login.
+            if platform == Platform.WEIXIN:
+                if config.token and config.extra.get("account_id"):
+                    connected.append(platform)
+                continue
             # Platforms that use token/api_key auth
             if config.token or config.api_key:
                 connected.append(platform)
@@ -872,6 +878,27 @@ def _apply_env_overrides(config: GatewayConfig) -> None:
                 name=os.getenv("FEISHU_HOME_CHANNEL_NAME", "Home"),
             )
 
+    # WeChat (Weixin)
+    weixin_token = os.getenv("WEIXIN_TOKEN")
+    if weixin_token:
+        if Platform.WEIXIN not in config.platforms:
+            config.platforms[Platform.WEIXIN] = PlatformConfig()
+        config.platforms[Platform.WEIXIN].enabled = True
+        config.platforms[Platform.WEIXIN].token = weixin_token
+        extra = config.platforms[Platform.WEIXIN].extra
+        extra["base_url"] = os.getenv("WEIXIN_BASE_URL", "https://ilinkai.weixin.qq.com")
+        extra["cdn_base_url"] = os.getenv("WEIXIN_CDN_BASE_URL", "https://novac2c.cdn.weixin.qq.com/c2c")
+        weixin_account_id = os.getenv("WEIXIN_ACCOUNT_ID", "")
+        if weixin_account_id:
+            extra["account_id"] = weixin_account_id
+        weixin_home = os.getenv("WEIXIN_HOME_CHANNEL")
+        if weixin_home:
+            config.platforms[Platform.WEIXIN].home_channel = HomeChannel(
+                platform=Platform.WEIXIN,
+                chat_id=weixin_home,
+                name=os.getenv("WEIXIN_HOME_CHANNEL_NAME", "Home"),
+            )
+
     # WeCom (Enterprise WeChat)
     wecom_bot_id = os.getenv("WECOM_BOT_ID")
     wecom_secret = os.getenv("WECOM_SECRET")
@@ -908,5 +935,3 @@ def _apply_env_overrides(config: GatewayConfig) -> None:
             config.default_reset_policy.at_hour = int(reset_hour)
         except ValueError:
             pass
-
-