feat: channel plugin architecture with decoupled configs

- Add plugin discovery via Python entry_points (group: nanobot.channels)
- Move 11 channel Config classes from schema.py into their own channel modules
- ChannelsConfig now only keeps send_progress + send_tool_hints (extra=allow)
- Each built-in channel parses dict->Pydantic in __init__, zero internal changes
- All channels implement default_config() for onboard auto-population
- nanobot onboard injects defaults for all discovered channels (built-in + plugins)
- Add nanobot plugins list CLI command
- Add Channel Plugin Guide (docs/CHANNEL_PLUGIN_GUIDE.md)
- Fully backward compatible: existing config.json and sessions work as-is
- 340 tests pass, zero regressions

.gitignore

@@ -5,7 +5,6 @@
 *.pyc
 dist/
 build/
-docs/
 *.egg-info/
 *.egg
 *.pycs

README.md

@@ -216,7 +216,9 @@ That's it! You have a working AI assistant in 2 minutes.
 
 ## 💬 Chat Apps
 
-Connect nanobot to your favorite chat platform.
+Connect nanobot to your favorite chat platform. Want to build your own? See the [Channel Plugin Guide](.docs/CHANNEL_PLUGIN_GUIDE.md).
+
+> Channel plugin support is available in the `main` branch; not yet published to PyPI.
 
 | Channel | What you need |
 |---------|---------------|
@@ -1370,7 +1372,7 @@ nanobot/
 │   ├── subagent.py #    Background task execution
 │   └── tools/      #    Built-in tools (incl. spawn)
 ├── skills/         # 🎯 Bundled skills (github, weather, tmux...)
-├── channels/       # 📱 Chat channel integrations
+├── channels/       # 📱 Chat channel integrations (supports plugins)
 ├── bus/            # 🚌 Message routing
 ├── cron/           # ⏰ Scheduled tasks
 ├── heartbeat/      # 💓 Proactive wake-up

docs/CHANNEL_PLUGIN_GUIDE.md

@@ -0,0 +1,254 @@
+# Channel Plugin Guide
+
+Build a custom nanobot channel in three steps: subclass, package, install.
+
+## How It Works
+
+nanobot discovers channel plugins via Python [entry points](https://packaging.python.org/en/latest/specifications/entry-points/). When `nanobot gateway` starts, it scans:
+
+1. Built-in channels in `nanobot/channels/`
+2. External packages registered under the `nanobot.channels` entry point group
+
+If a matching config section has `"enabled": true`, the channel is instantiated and started.
+
+## Quick Start
+
+We'll build a minimal webhook channel that receives messages via HTTP POST and sends replies back.
+
+### Project Structure
+
+```
+nanobot-channel-webhook/
+├── nanobot_channel_webhook/
+│   ├── __init__.py          # re-export WebhookChannel
+│   └── channel.py           # channel implementation
+└── pyproject.toml
+```
+
+### 1. Create Your Channel
+
+```python
+# nanobot_channel_webhook/__init__.py
+from nanobot_channel_webhook.channel import WebhookChannel
+
+__all__ = ["WebhookChannel"]
+```
+
+```python
+# nanobot_channel_webhook/channel.py
+import asyncio
+from typing import Any
+
+from aiohttp import web
+from loguru import logger
+
+from nanobot.channels.base import BaseChannel
+from nanobot.bus.events import OutboundMessage
+
+
+class WebhookChannel(BaseChannel):
+    name = "webhook"
+    display_name = "Webhook"
+
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return {"enabled": False, "port": 9000, "allowFrom": []}
+
+    async def start(self) -> None:
+        """Start an HTTP server that listens for incoming messages.
+
+        IMPORTANT: start() must block forever (or until stop() is called).
+        If it returns, the channel is considered dead.
+        """
+        self._running = True
+        port = self.config.get("port", 9000)
+
+        app = web.Application()
+        app.router.add_post("/message", self._on_request)
+        runner = web.AppRunner(app)
+        await runner.setup()
+        site = web.TCPSite(runner, "0.0.0.0", port)
+        await site.start()
+        logger.info("Webhook listening on :{}", port)
+
+        # Block until stopped
+        while self._running:
+            await asyncio.sleep(1)
+
+        await runner.cleanup()
+
+    async def stop(self) -> None:
+        self._running = False
+
+    async def send(self, msg: OutboundMessage) -> None:
+        """Deliver an outbound message.
+
+        msg.content  — markdown text (convert to platform format as needed)
+        msg.media    — list of local file paths to attach
+        msg.chat_id  — the recipient (same chat_id you passed to _handle_message)
+        msg.metadata — may contain "_progress": True for streaming chunks
+        """
+        logger.info("[webhook] -> {}: {}", msg.chat_id, msg.content[:80])
+        # In a real plugin: POST to a callback URL, send via SDK, etc.
+
+    async def _on_request(self, request: web.Request) -> web.Response:
+        """Handle an incoming HTTP POST."""
+        body = await request.json()
+        sender = body.get("sender", "unknown")
+        chat_id = body.get("chat_id", sender)
+        text = body.get("text", "")
+        media = body.get("media", [])       # list of URLs
+
+        # This is the key call: validates allowFrom, then puts the
+        # message onto the bus for the agent to process.
+        await self._handle_message(
+            sender_id=sender,
+            chat_id=chat_id,
+            content=text,
+            media=media,
+        )
+
+        return web.json_response({"ok": True})
+```
+
+### 2. Register the Entry Point
+
+```toml
+# pyproject.toml
+[project]
+name = "nanobot-channel-webhook"
+version = "0.1.0"
+dependencies = ["nanobot", "aiohttp"]
+
+[project.entry-points."nanobot.channels"]
+webhook = "nanobot_channel_webhook:WebhookChannel"
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.backends._legacy:_Backend"
+```
+
+The key (`webhook`) becomes the config section name. The value points to your `BaseChannel` subclass.
+
+### 3. Install & Configure
+
+```bash
+pip install -e .
+nanobot plugins list      # verify "Webhook" shows as "plugin"
+nanobot onboard           # auto-adds default config for detected plugins
+```
+
+Edit `~/.nanobot/config.json`:
+
+```json
+{
+  "channels": {
+    "webhook": {
+      "enabled": true,
+      "port": 9000,
+      "allowFrom": ["*"]
+    }
+  }
+}
+```
+
+### 4. Run & Test
+
+```bash
+nanobot gateway
+```
+
+In another terminal:
+
+```bash
+curl -X POST http://localhost:9000/message \
+  -H "Content-Type: application/json" \
+  -d '{"sender": "user1", "chat_id": "user1", "text": "Hello!"}'
+```
+
+The agent receives the message and processes it. Replies arrive in your `send()` method.
+
+## BaseChannel API
+
+### Required (abstract)
+
+| Method | Description |
+|--------|-------------|
+| `async start()` | **Must block forever.** Connect to platform, listen for messages, call `_handle_message()` on each. If this returns, the channel is dead. |
+| `async stop()` | Set `self._running = False` and clean up. Called when gateway shuts down. |
+| `async send(msg: OutboundMessage)` | Deliver an outbound message to the platform. |
+
+### Provided by Base
+
+| Method / Property | Description |
+|-------------------|-------------|
+| `_handle_message(sender_id, chat_id, content, media?, metadata?, session_key?)` | **Call this when you receive a message.** Checks `is_allowed()`, then publishes to the bus. |
+| `is_allowed(sender_id)` | Checks against `config["allowFrom"]`; `"*"` allows all, `[]` denies all. |
+| `default_config()` (classmethod) | Returns default config dict for `nanobot onboard`. Override to declare your fields. |
+| `transcribe_audio(file_path)` | Transcribes audio via Groq Whisper (if configured). |
+| `is_running` | Returns `self._running`. |
+
+### Message Types
+
+```python
+@dataclass
+class OutboundMessage:
+    channel: str        # your channel name
+    chat_id: str        # recipient (same value you passed to _handle_message)
+    content: str        # markdown text — convert to platform format as needed
+    media: list[str]    # local file paths to attach (images, audio, docs)
+    metadata: dict      # may contain: "_progress" (bool) for streaming chunks,
+                        #              "message_id" for reply threading
+```
+
+## Config
+
+Your channel receives config as a plain `dict`. Access fields with `.get()`:
+
+```python
+async def start(self) -> None:
+    port = self.config.get("port", 9000)
+    token = self.config.get("token", "")
+```
+
+`allowFrom` is handled automatically by `_handle_message()` — you don't need to check it yourself.
+
+Override `default_config()` so `nanobot onboard` auto-populates `config.json`:
+
+```python
+@classmethod
+def default_config(cls) -> dict[str, Any]:
+    return {"enabled": False, "port": 9000, "allowFrom": []}
+```
+
+If not overridden, the base class returns `{"enabled": false}`.
+
+## Naming Convention
+
+| What | Format | Example |
+|------|--------|---------|
+| PyPI package | `nanobot-channel-{name}` | `nanobot-channel-webhook` |
+| Entry point key | `{name}` | `webhook` |
+| Config section | `channels.{name}` | `channels.webhook` |
+| Python package | `nanobot_channel_{name}` | `nanobot_channel_webhook` |
+
+## Local Development
+
+```bash
+git clone https://github.com/you/nanobot-channel-webhook
+cd nanobot-channel-webhook
+pip install -e .
+nanobot plugins list    # should show "Webhook" as "plugin"
+nanobot gateway         # test end-to-end
+```
+
+## Verify
+
+```bash
+$ nanobot plugins list
+
+  Name       Source    Enabled
+  telegram   builtin  yes
+  discord    builtin  no
+  webhook    plugin   yes
+```

nanobot/channels/base.py

@@ -128,6 +128,11 @@ class BaseChannel(ABC):
 
         await self.bus.publish_inbound(msg)
 
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        """Return default config for onboard. Override in plugins to auto-populate config.json."""
+        return {"enabled": False}
+
     @property
     def is_running(self) -> bool:
         """Check if the channel is running."""

nanobot/channels/dingtalk.py

@@ -11,11 +11,12 @@ from urllib.parse import unquote, urlparse
 
 import httpx
 from loguru import logger
+from pydantic import Field
 
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
-from nanobot.config.schema import DingTalkConfig
+from nanobot.config.schema import Base
 
 try:
     from dingtalk_stream import (
@@ -102,6 +103,15 @@ class NanobotDingTalkHandler(CallbackHandler):
             return AckMessage.STATUS_OK, "Error"
 
 
+class DingTalkConfig(Base):
+    """DingTalk channel configuration using Stream mode."""
+
+    enabled: bool = False
+    client_id: str = ""
+    client_secret: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+
+
 class DingTalkChannel(BaseChannel):
     """
     DingTalk channel using Stream Mode.
@@ -119,7 +129,13 @@ class DingTalkChannel(BaseChannel):
     _AUDIO_EXTS = {".amr", ".mp3", ".wav", ".ogg", ".m4a", ".aac"}
     _VIDEO_EXTS = {".mp4", ".mov", ".avi", ".mkv", ".webm"}
 
-    def __init__(self, config: DingTalkConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return DingTalkConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = DingTalkConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: DingTalkConfig = config
         self._client: Any = None

nanobot/channels/discord.py

@@ -3,9 +3,10 @@
 import asyncio
 import json
 from pathlib import Path
-from typing import Any
+from typing import Any, Literal
 
 import httpx
+from pydantic import Field
 import websockets
 from loguru import logger
 
@@ -13,7 +14,7 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_media_dir
-from nanobot.config.schema import DiscordConfig
+from nanobot.config.schema import Base
 from nanobot.utils.helpers import split_message
 
 DISCORD_API_BASE = "https://discord.com/api/v10"
@@ -21,13 +22,30 @@ MAX_ATTACHMENT_BYTES = 20 * 1024 * 1024  # 20MB
 MAX_MESSAGE_LEN = 2000  # Discord message character limit
 
 
+class DiscordConfig(Base):
+    """Discord channel configuration."""
+
+    enabled: bool = False
+    token: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+    gateway_url: str = "wss://gateway.discord.gg/?v=10&encoding=json"
+    intents: int = 37377
+    group_policy: Literal["mention", "open"] = "mention"
+
+
 class DiscordChannel(BaseChannel):
     """Discord channel using Gateway websocket."""
 
     name = "discord"
     display_name = "Discord"
 
-    def __init__(self, config: DiscordConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return DiscordConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = DiscordConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: DiscordConfig = config
         self._ws: websockets.WebSocketClientProtocol | None = None

nanobot/channels/email.py

@@ -15,11 +15,41 @@ from email.utils import parseaddr
 from typing import Any
 
 from loguru import logger
+from pydantic import Field
 
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
-from nanobot.config.schema import EmailConfig
+from nanobot.config.schema import Base
+
+
+class EmailConfig(Base):
+    """Email channel configuration (IMAP inbound + SMTP outbound)."""
+
+    enabled: bool = False
+    consent_granted: bool = False
+
+    imap_host: str = ""
+    imap_port: int = 993
+    imap_username: str = ""
+    imap_password: str = ""
+    imap_mailbox: str = "INBOX"
+    imap_use_ssl: bool = True
+
+    smtp_host: str = ""
+    smtp_port: int = 587
+    smtp_username: str = ""
+    smtp_password: str = ""
+    smtp_use_tls: bool = True
+    smtp_use_ssl: bool = False
+    from_address: str = ""
+
+    auto_reply_enabled: bool = True
+    poll_interval_seconds: int = 30
+    mark_seen: bool = True
+    max_body_chars: int = 12000
+    subject_prefix: str = "Re: "
+    allow_from: list[str] = Field(default_factory=list)
 
 
 class EmailChannel(BaseChannel):
@@ -51,7 +81,13 @@ class EmailChannel(BaseChannel):
         "Dec",
     )
 
-    def __init__(self, config: EmailConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return EmailConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = EmailConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: EmailConfig = config
         self._last_subject_by_chat: dict[str, str] = {}

nanobot/channels/feishu.py

@@ -7,7 +7,7 @@ import re
 import threading
 from collections import OrderedDict
 from pathlib import Path
-from typing import Any
+from typing import Any, Literal
 
 from loguru import logger
 
@@ -15,7 +15,8 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_media_dir
-from nanobot.config.schema import FeishuConfig
+from nanobot.config.schema import Base
+from pydantic import Field
 
 import importlib.util
 
@@ -231,6 +232,19 @@ def _extract_post_text(content_json: dict) -> str:
     return text
 
 
+class FeishuConfig(Base):
+    """Feishu/Lark channel configuration using WebSocket long connection."""
+
+    enabled: bool = False
+    app_id: str = ""
+    app_secret: str = ""
+    encrypt_key: str = ""
+    verification_token: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+    react_emoji: str = "THUMBSUP"
+    group_policy: Literal["open", "mention"] = "mention"
+
+
 class FeishuChannel(BaseChannel):
     """
     Feishu/Lark channel using WebSocket long connection.
@@ -246,7 +260,13 @@ class FeishuChannel(BaseChannel):
     name = "feishu"
     display_name = "Feishu"
 
-    def __init__(self, config: FeishuConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return FeishuConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = FeishuConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: FeishuConfig = config
         self._client: Any = None

nanobot/channels/manager.py

@@ -31,23 +31,29 @@ class ChannelManager:
         self._init_channels()
 
     def _init_channels(self) -> None:
-        """Initialize channels discovered via pkgutil scan."""
+        """Initialize channels discovered via pkgutil scan + entry_points plugins."""
-        from nanobot.channels.registry import discover_channel_names, load_channel_class
+        from nanobot.channels.registry import discover_all
 
         groq_key = self.config.providers.groq.api_key
 
-        for modname in discover_channel_names():
+        for name, cls in discover_all().items():
-            section = getattr(self.config.channels, modname, None)
+            section = getattr(self.config.channels, name, None)
-            if not section or not getattr(section, "enabled", False):
+            if section is None:
+                continue
+            enabled = (
+                section.get("enabled", False)
+                if isinstance(section, dict)
+                else getattr(section, "enabled", False)
+            )
+            if not enabled:
                 continue
             try:
-                cls = load_channel_class(modname)
                 channel = cls(section, self.bus)
                 channel.transcription_api_key = groq_key
-                self.channels[modname] = channel
+                self.channels[name] = channel
                 logger.info("{} channel enabled", cls.display_name)
-            except ImportError as e:
+            except Exception as e:
-                logger.warning("{} channel not available: {}", modname, e)
+                logger.warning("{} channel not available: {}", name, e)
 
         self._validate_allow_from()
 

nanobot/channels/matrix.py

@@ -4,9 +4,10 @@ import asyncio
 import logging
 import mimetypes
 from pathlib import Path
-from typing import Any, TypeAlias
+from typing import Any, Literal, TypeAlias
 
 from loguru import logger
+from pydantic import Field
 
 try:
     import nh3
@@ -40,6 +41,7 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_data_dir, get_media_dir
+from nanobot.config.schema import Base
 from nanobot.utils.helpers import safe_filename
 
 TYPING_NOTICE_TIMEOUT_MS = 30_000
@@ -143,12 +145,33 @@ def _configure_nio_logging_bridge() -> None:
         nio_logger.propagate = False
 
 
+class MatrixConfig(Base):
+    """Matrix (Element) channel configuration."""
+
+    enabled: bool = False
+    homeserver: str = "https://matrix.org"
+    access_token: str = ""
+    user_id: str = ""
+    device_id: str = ""
+    e2ee_enabled: bool = True
+    sync_stop_grace_seconds: int = 2
+    max_media_bytes: int = 20 * 1024 * 1024
+    allow_from: list[str] = Field(default_factory=list)
+    group_policy: Literal["open", "mention", "allowlist"] = "open"
+    group_allow_from: list[str] = Field(default_factory=list)
+    allow_room_mentions: bool = False
+
+
 class MatrixChannel(BaseChannel):
     """Matrix (Element) channel using long-polling sync."""
 
     name = "matrix"
     display_name = "Matrix"
 
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return MatrixConfig().model_dump(by_alias=True)
+
     def __init__(
         self,
         config: Any,
@@ -157,6 +180,8 @@ class MatrixChannel(BaseChannel):
         restrict_to_workspace: bool = False,
         workspace: str | Path | None = None,
     ):
+        if isinstance(config, dict):
+            config = MatrixConfig.model_validate(config)
         super().__init__(config, bus)
         self.client: AsyncClient | None = None
         self._sync_task: asyncio.Task | None = None

nanobot/channels/mochat.py

@@ -16,7 +16,8 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_runtime_subdir
-from nanobot.config.schema import MochatConfig
+from nanobot.config.schema import Base
+from pydantic import Field
 
 try:
     import socketio
@@ -208,6 +209,49 @@ def parse_timestamp(value: Any) -> int | None:
         return None
 
 
+# ---------------------------------------------------------------------------
+# Config classes
+# ---------------------------------------------------------------------------
+
+class MochatMentionConfig(Base):
+    """Mochat mention behavior configuration."""
+
+    require_in_groups: bool = False
+
+
+class MochatGroupRule(Base):
+    """Mochat per-group mention requirement."""
+
+    require_mention: bool = False
+
+
+class MochatConfig(Base):
+    """Mochat channel configuration."""
+
+    enabled: bool = False
+    base_url: str = "https://mochat.io"
+    socket_url: str = ""
+    socket_path: str = "/socket.io"
+    socket_disable_msgpack: bool = False
+    socket_reconnect_delay_ms: int = 1000
+    socket_max_reconnect_delay_ms: int = 10000
+    socket_connect_timeout_ms: int = 10000
+    refresh_interval_ms: int = 30000
+    watch_timeout_ms: int = 25000
+    watch_limit: int = 100
+    retry_delay_ms: int = 500
+    max_retry_attempts: int = 0
+    claw_token: str = ""
+    agent_user_id: str = ""
+    sessions: list[str] = Field(default_factory=list)
+    panels: list[str] = Field(default_factory=list)
+    allow_from: list[str] = Field(default_factory=list)
+    mention: MochatMentionConfig = Field(default_factory=MochatMentionConfig)
+    groups: dict[str, MochatGroupRule] = Field(default_factory=dict)
+    reply_delay_mode: str = "non-mention"
+    reply_delay_ms: int = 120000
+
+
 # ---------------------------------------------------------------------------
 # Channel
 # ---------------------------------------------------------------------------
@@ -218,7 +262,13 @@ class MochatChannel(BaseChannel):
     name = "mochat"
     display_name = "Mochat"
 
-    def __init__(self, config: MochatConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return MochatConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = MochatConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: MochatConfig = config
         self._http: httpx.AsyncClient | None = None

nanobot/channels/qq.py

@@ -2,14 +2,15 @@
 
 import asyncio
 from collections import deque
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Any
 
 from loguru import logger
 
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
-from nanobot.config.schema import QQConfig
+from nanobot.config.schema import Base
+from pydantic import Field
 
 try:
     import botpy
@@ -50,13 +51,28 @@ def _make_bot_class(channel: "QQChannel") -> "type[botpy.Client]":
     return _Bot
 
 
+class QQConfig(Base):
+    """QQ channel configuration using botpy SDK."""
+
+    enabled: bool = False
+    app_id: str = ""
+    secret: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+
+
 class QQChannel(BaseChannel):
     """QQ channel using botpy SDK with WebSocket connection."""
 
     name = "qq"
     display_name = "QQ"
 
-    def __init__(self, config: QQConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return QQConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = QQConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: QQConfig = config
         self._client: "botpy.Client | None" = None

nanobot/channels/registry.py

@@ -1,4 +1,4 @@
-"""Auto-discovery for channel modules — no hardcoded registry."""
+"""Auto-discovery for built-in channel modules and external plugins."""
 
 from __future__ import annotations
 
@@ -6,6 +6,8 @@ import importlib
 import pkgutil
 from typing import TYPE_CHECKING
 
+from loguru import logger
+
 if TYPE_CHECKING:
     from nanobot.channels.base import BaseChannel
 
@@ -13,7 +15,7 @@ _INTERNAL = frozenset({"base", "manager", "registry"})
 
 
 def discover_channel_names() -> list[str]:
-    """Return all channel module names by scanning the package (zero imports)."""
+    """Return all built-in channel module names by scanning the package (zero imports)."""
     import nanobot.channels as pkg
 
     return [
@@ -33,3 +35,37 @@ def load_channel_class(module_name: str) -> type[BaseChannel]:
         if isinstance(obj, type) and issubclass(obj, _Base) and obj is not _Base:
             return obj
     raise ImportError(f"No BaseChannel subclass in nanobot.channels.{module_name}")
+
+
+def discover_plugins() -> dict[str, type[BaseChannel]]:
+    """Discover external channel plugins registered via entry_points."""
+    from importlib.metadata import entry_points
+
+    plugins: dict[str, type[BaseChannel]] = {}
+    for ep in entry_points(group="nanobot.channels"):
+        try:
+            cls = ep.load()
+            plugins[ep.name] = cls
+        except Exception as e:
+            logger.warning("Failed to load channel plugin '{}': {}", ep.name, e)
+    return plugins
+
+
+def discover_all() -> dict[str, type[BaseChannel]]:
+    """Return all channels: built-in (pkgutil) merged with external (entry_points).
+
+    Built-in channels take priority — an external plugin cannot shadow a built-in name.
+    """
+    builtin: dict[str, type[BaseChannel]] = {}
+    for modname in discover_channel_names():
+        try:
+            builtin[modname] = load_channel_class(modname)
+        except ImportError as e:
+            logger.debug("Skipping built-in channel '{}': {}", modname, e)
+
+    external = discover_plugins()
+    shadowed = set(external) & set(builtin)
+    if shadowed:
+        logger.warning("Plugin(s) shadowed by built-in channels (ignored): {}", shadowed)
+
+    return {**external, **builtin}

nanobot/channels/slack.py

@@ -13,8 +13,35 @@ from slackify_markdown import slackify_markdown
 
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
+from pydantic import Field
+
 from nanobot.channels.base import BaseChannel
-from nanobot.config.schema import SlackConfig
+from nanobot.config.schema import Base
+
+
+class SlackDMConfig(Base):
+    """Slack DM policy configuration."""
+
+    enabled: bool = True
+    policy: str = "open"
+    allow_from: list[str] = Field(default_factory=list)
+
+
+class SlackConfig(Base):
+    """Slack channel configuration."""
+
+    enabled: bool = False
+    mode: str = "socket"
+    webhook_path: str = "/slack/events"
+    bot_token: str = ""
+    app_token: str = ""
+    user_token_read_only: bool = True
+    reply_in_thread: bool = True
+    react_emoji: str = "eyes"
+    allow_from: list[str] = Field(default_factory=list)
+    group_policy: str = "mention"
+    group_allow_from: list[str] = Field(default_factory=list)
+    dm: SlackDMConfig = Field(default_factory=SlackDMConfig)
 
 
 class SlackChannel(BaseChannel):
@@ -23,7 +50,13 @@ class SlackChannel(BaseChannel):
     name = "slack"
     display_name = "Slack"
 
-    def __init__(self, config: SlackConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return SlackConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = SlackConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: SlackConfig = config
         self._web_client: AsyncWebClient | None = None

nanobot/channels/telegram.py

@@ -6,8 +6,10 @@ import asyncio
 import re
 import time
 import unicodedata
+from typing import Any, Literal
 
 from loguru import logger
+from pydantic import Field
 from telegram import BotCommand, ReplyParameters, Update
 from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
 from telegram.request import HTTPXRequest
@@ -16,7 +18,7 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_media_dir
-from nanobot.config.schema import TelegramConfig
+from nanobot.config.schema import Base
 from nanobot.utils.helpers import split_message
 
 TELEGRAM_MAX_MESSAGE_LEN = 4000  # Telegram message character limit
@@ -148,6 +150,17 @@ def _markdown_to_telegram_html(text: str) -> str:
     return text
 
 
+class TelegramConfig(Base):
+    """Telegram channel configuration."""
+
+    enabled: bool = False
+    token: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+    proxy: str | None = None
+    reply_to_message: bool = False
+    group_policy: Literal["open", "mention"] = "mention"
+
+
 class TelegramChannel(BaseChannel):
     """
     Telegram channel using long polling.
@@ -167,7 +180,13 @@ class TelegramChannel(BaseChannel):
         BotCommand("restart", "Restart the bot"),
     ]
 
-    def __init__(self, config: TelegramConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return TelegramConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = TelegramConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: TelegramConfig = config
         self._app: Application | None = None

nanobot/channels/wecom.py

@@ -12,10 +12,21 @@ from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
 from nanobot.config.paths import get_media_dir
-from nanobot.config.schema import WecomConfig
+from nanobot.config.schema import Base
+from pydantic import Field
 
 WECOM_AVAILABLE = importlib.util.find_spec("wecom_aibot_sdk") is not None
 
+class WecomConfig(Base):
+    """WeCom (Enterprise WeChat) AI Bot channel configuration."""
+
+    enabled: bool = False
+    bot_id: str = ""
+    secret: str = ""
+    allow_from: list[str] = Field(default_factory=list)
+    welcome_message: str = ""
+
+
 # Message type display mapping
 MSG_TYPE_MAP = {
     "image": "[image]",
@@ -38,7 +49,13 @@ class WecomChannel(BaseChannel):
     name = "wecom"
     display_name = "WeCom"
 
-    def __init__(self, config: WecomConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return WecomConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = WecomConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: WecomConfig = config
         self._client: Any = None

nanobot/channels/whatsapp.py

@@ -4,13 +4,25 @@ import asyncio
 import json
 import mimetypes
 from collections import OrderedDict
+from typing import Any
 
 from loguru import logger
 
+from pydantic import Field
+
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
-from nanobot.config.schema import WhatsAppConfig
+from nanobot.config.schema import Base
+
+
+class WhatsAppConfig(Base):
+    """WhatsApp channel configuration."""
+
+    enabled: bool = False
+    bridge_url: str = "ws://localhost:3001"
+    bridge_token: str = ""
+    allow_from: list[str] = Field(default_factory=list)
 
 
 class WhatsAppChannel(BaseChannel):
@@ -24,9 +36,14 @@ class WhatsAppChannel(BaseChannel):
     name = "whatsapp"
     display_name = "WhatsApp"
 
-    def __init__(self, config: WhatsAppConfig, bus: MessageBus):
+    @classmethod
+    def default_config(cls) -> dict[str, Any]:
+        return WhatsAppConfig().model_dump(by_alias=True)
+
+    def __init__(self, config: Any, bus: MessageBus):
+        if isinstance(config, dict):
+            config = WhatsAppConfig.model_validate(config)
         super().__init__(config, bus)
-        self.config: WhatsAppConfig = config
         self._ws = None
         self._connected = False
         self._processed_message_ids: OrderedDict[str, None] = OrderedDict()

nanobot/cli/commands.py

@@ -240,6 +240,8 @@ def onboard():
 
     console.print("[dim]Config template now uses `maxTokens` + `contextWindowTokens`; `memoryWindow` is no longer a runtime setting.[/dim]")
 
+    _onboard_plugins(config_path)
+
     # Create workspace
     workspace = get_workspace_path()
 
@@ -257,7 +259,26 @@ def onboard():
     console.print("\n[dim]Want Telegram/WhatsApp? See: https://github.com/HKUDS/nanobot#-chat-apps[/dim]")
 
 
+def _onboard_plugins(config_path: Path) -> None:
+    """Inject default config for all discovered channels (built-in + plugins)."""
+    import json
 
+    from nanobot.channels.registry import discover_all
+
+    all_channels = discover_all()
+    if not all_channels:
+        return
+
+    with open(config_path, encoding="utf-8") as f:
+        data = json.load(f)
+
+    channels = data.setdefault("channels", {})
+    for name, cls in all_channels.items():
+        if name not in channels:
+            channels[name] = cls.default_config()
+
+    with open(config_path, "w", encoding="utf-8") as f:
+        json.dump(data, f, indent=2, ensure_ascii=False)
 
 
 def _make_provider(config: Config):
@@ -731,7 +752,7 @@ app.add_typer(channels_app, name="channels")
 @channels_app.command("status")
 def channels_status():
     """Show channel status."""
-    from nanobot.channels.registry import discover_channel_names, load_channel_class
+    from nanobot.channels.registry import discover_all
     from nanobot.config.loader import load_config
 
     config = load_config()
@@ -740,16 +761,16 @@ def channels_status():
     table.add_column("Channel", style="cyan")
     table.add_column("Enabled", style="green")
 
-    for modname in sorted(discover_channel_names()):
+    for name, cls in sorted(discover_all().items()):
-        section = getattr(config.channels, modname, None)
+        section = getattr(config.channels, name, None)
-        enabled = section and getattr(section, "enabled", False)
+        if section is None:
-        try:
+            enabled = False
-            cls = load_channel_class(modname)
+        elif isinstance(section, dict):
-            display = cls.display_name
+            enabled = section.get("enabled", False)
-        except ImportError:
+        else:
-            display = modname.title()
+            enabled = getattr(section, "enabled", False)
         table.add_row(
-            display,
+            cls.display_name,
             "[green]\u2713[/green]" if enabled else "[dim]\u2717[/dim]",
         )
 
@@ -831,8 +852,10 @@ def channels_login():
     console.print("Scan the QR code to connect.\n")
 
     env = {**os.environ}
-    if config.channels.whatsapp.bridge_token:
+    wa_cfg = getattr(config.channels, "whatsapp", None) or {}
-        env["BRIDGE_TOKEN"] = config.channels.whatsapp.bridge_token
+    bridge_token = wa_cfg.get("bridgeToken", "") if isinstance(wa_cfg, dict) else getattr(wa_cfg, "bridge_token", "")
+    if bridge_token:
+        env["BRIDGE_TOKEN"] = bridge_token
     env["AUTH_DIR"] = str(get_runtime_subdir("whatsapp-auth"))
 
     try:
@@ -843,6 +866,48 @@ def channels_login():
         console.print("[red]npm not found. Please install Node.js.[/red]")
 
 
+# ============================================================================
+# Plugin Commands
+# ============================================================================
+
+plugins_app = typer.Typer(help="Manage channel plugins")
+app.add_typer(plugins_app, name="plugins")
+
+
+@plugins_app.command("list")
+def plugins_list():
+    """List all discovered channels (built-in and plugins)."""
+    from nanobot.channels.registry import discover_all, discover_channel_names
+    from nanobot.config.loader import load_config
+
+    config = load_config()
+    builtin_names = set(discover_channel_names())
+    all_channels = discover_all()
+
+    table = Table(title="Channel Plugins")
+    table.add_column("Name", style="cyan")
+    table.add_column("Source", style="magenta")
+    table.add_column("Enabled", style="green")
+
+    for name in sorted(all_channels):
+        cls = all_channels[name]
+        source = "builtin" if name in builtin_names else "plugin"
+        section = getattr(config.channels, name, None)
+        if section is None:
+            enabled = False
+        elif isinstance(section, dict):
+            enabled = section.get("enabled", False)
+        else:
+            enabled = getattr(section, "enabled", False)
+        table.add_row(
+            cls.display_name,
+            source,
+            "[green]yes[/green]" if enabled else "[dim]no[/dim]",
+        )
+
+    console.print(table)
+
+
 # ============================================================================
 # Status Commands
 # ============================================================================

nanobot/config/schema.py

@@ -14,219 +14,17 @@ class Base(BaseModel):
     model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
 
 
-class WhatsAppConfig(Base):
-    """WhatsApp channel configuration."""
-
-    enabled: bool = False
-    bridge_url: str = "ws://localhost:3001"
-    bridge_token: str = ""  # Shared token for bridge auth (optional, recommended)
-    allow_from: list[str] = Field(default_factory=list)  # Allowed phone numbers
-
-
-class TelegramConfig(Base):
-    """Telegram channel configuration."""
-
-    enabled: bool = False
-    token: str = ""  # Bot token from @BotFather
-    allow_from: list[str] = Field(default_factory=list)  # Allowed user IDs or usernames
-    proxy: str | None = (
-        None  # HTTP/SOCKS5 proxy URL, e.g. "http://127.0.0.1:7890" or "socks5://127.0.0.1:1080"
-    )
-    reply_to_message: bool = False  # If true, bot replies quote the original message
-    group_policy: Literal["open", "mention"] = "mention"  # "mention" responds when @mentioned or replied to, "open" responds to all
-
-
-class FeishuConfig(Base):
-    """Feishu/Lark channel configuration using WebSocket long connection."""
-
-    enabled: bool = False
-    app_id: str = ""  # App ID from Feishu Open Platform
-    app_secret: str = ""  # App Secret from Feishu Open Platform
-    encrypt_key: str = ""  # Encrypt Key for event subscription (optional)
-    verification_token: str = ""  # Verification Token for event subscription (optional)
-    allow_from: list[str] = Field(default_factory=list)  # Allowed user open_ids
-    react_emoji: str = (
-        "THUMBSUP"  # Emoji type for message reactions (e.g. THUMBSUP, OK, DONE, SMILE)
-    )
-    group_policy: Literal["open", "mention"] = "mention"  # "mention" responds when @mentioned, "open" responds to all
-
-
-class DingTalkConfig(Base):
-    """DingTalk channel configuration using Stream mode."""
-
-    enabled: bool = False
-    client_id: str = ""  # AppKey
-    client_secret: str = ""  # AppSecret
-    allow_from: list[str] = Field(default_factory=list)  # Allowed staff_ids
-
-
-class DiscordConfig(Base):
-    """Discord channel configuration."""
-
-    enabled: bool = False
-    token: str = ""  # Bot token from Discord Developer Portal
-    allow_from: list[str] = Field(default_factory=list)  # Allowed user IDs
-    gateway_url: str = "wss://gateway.discord.gg/?v=10&encoding=json"
-    intents: int = 37377  # GUILDS + GUILD_MESSAGES + DIRECT_MESSAGES + MESSAGE_CONTENT
-    group_policy: Literal["mention", "open"] = "mention"
-
-
-class MatrixConfig(Base):
-    """Matrix (Element) channel configuration."""
-
-    enabled: bool = False
-    homeserver: str = "https://matrix.org"
-    access_token: str = ""
-    user_id: str = ""  # @bot:matrix.org
-    device_id: str = ""
-    e2ee_enabled: bool = True  # Enable Matrix E2EE support (encryption + encrypted room handling).
-    sync_stop_grace_seconds: int = (
-        2  # Max seconds to wait for sync_forever to stop gracefully before cancellation fallback.
-    )
-    max_media_bytes: int = (
-        20 * 1024 * 1024
-    )  # Max attachment size accepted for Matrix media handling (inbound + outbound).
-    allow_from: list[str] = Field(default_factory=list)
-    group_policy: Literal["open", "mention", "allowlist"] = "open"
-    group_allow_from: list[str] = Field(default_factory=list)
-    allow_room_mentions: bool = False
-
-
-class EmailConfig(Base):
-    """Email channel configuration (IMAP inbound + SMTP outbound)."""
-
-    enabled: bool = False
-    consent_granted: bool = False  # Explicit owner permission to access mailbox data
-
-    # IMAP (receive)
-    imap_host: str = ""
-    imap_port: int = 993
-    imap_username: str = ""
-    imap_password: str = ""
-    imap_mailbox: str = "INBOX"
-    imap_use_ssl: bool = True
-
-    # SMTP (send)
-    smtp_host: str = ""
-    smtp_port: int = 587
-    smtp_username: str = ""
-    smtp_password: str = ""
-    smtp_use_tls: bool = True
-    smtp_use_ssl: bool = False
-    from_address: str = ""
-
-    # Behavior
-    auto_reply_enabled: bool = (
-        True  # If false, inbound email is read but no automatic reply is sent
-    )
-    poll_interval_seconds: int = 30
-    mark_seen: bool = True
-    max_body_chars: int = 12000
-    subject_prefix: str = "Re: "
-    allow_from: list[str] = Field(default_factory=list)  # Allowed sender email addresses
-
-
-class MochatMentionConfig(Base):
-    """Mochat mention behavior configuration."""
-
-    require_in_groups: bool = False
-
-
-class MochatGroupRule(Base):
-    """Mochat per-group mention requirement."""
-
-    require_mention: bool = False
-
-
-class MochatConfig(Base):
-    """Mochat channel configuration."""
-
-    enabled: bool = False
-    base_url: str = "https://mochat.io"
-    socket_url: str = ""
-    socket_path: str = "/socket.io"
-    socket_disable_msgpack: bool = False
-    socket_reconnect_delay_ms: int = 1000
-    socket_max_reconnect_delay_ms: int = 10000
-    socket_connect_timeout_ms: int = 10000
-    refresh_interval_ms: int = 30000
-    watch_timeout_ms: int = 25000
-    watch_limit: int = 100
-    retry_delay_ms: int = 500
-    max_retry_attempts: int = 0  # 0 means unlimited retries
-    claw_token: str = ""
-    agent_user_id: str = ""
-    sessions: list[str] = Field(default_factory=list)
-    panels: list[str] = Field(default_factory=list)
-    allow_from: list[str] = Field(default_factory=list)
-    mention: MochatMentionConfig = Field(default_factory=MochatMentionConfig)
-    groups: dict[str, MochatGroupRule] = Field(default_factory=dict)
-    reply_delay_mode: str = "non-mention"  # off | non-mention
-    reply_delay_ms: int = 120000
-
-
-class SlackDMConfig(Base):
-    """Slack DM policy configuration."""
-
-    enabled: bool = True
-    policy: str = "open"  # "open" or "allowlist"
-    allow_from: list[str] = Field(default_factory=list)  # Allowed Slack user IDs
-
-
-class SlackConfig(Base):
-    """Slack channel configuration."""
-
-    enabled: bool = False
-    mode: str = "socket"  # "socket" supported
-    webhook_path: str = "/slack/events"
-    bot_token: str = ""  # xoxb-...
-    app_token: str = ""  # xapp-...
-    user_token_read_only: bool = True
-    reply_in_thread: bool = True
-    react_emoji: str = "eyes"
-    allow_from: list[str] = Field(default_factory=list)  # Allowed Slack user IDs (sender-level)
-    group_policy: str = "mention"  # "mention", "open", "allowlist"
-    group_allow_from: list[str] = Field(default_factory=list)  # Allowed channel IDs if allowlist
-    dm: SlackDMConfig = Field(default_factory=SlackDMConfig)
-
-
-class QQConfig(Base):
-    """QQ channel configuration using botpy SDK."""
-
-    enabled: bool = False
-    app_id: str = ""  # 机器人 ID (AppID) from q.qq.com
-    secret: str = ""  # 机器人密钥 (AppSecret) from q.qq.com
-    allow_from: list[str] = Field(
-        default_factory=list
-    )  # Allowed user openids (empty = public access)
-
-
-class WecomConfig(Base):
-    """WeCom (Enterprise WeChat) AI Bot channel configuration."""
-
-    enabled: bool = False
-    bot_id: str = ""  # Bot ID from WeCom AI Bot platform
-    secret: str = ""  # Bot Secret from WeCom AI Bot platform
-    allow_from: list[str] = Field(default_factory=list)  # Allowed user IDs
-    welcome_message: str = ""  # Welcome message for enter_chat event
-
-
 class ChannelsConfig(Base):
-    """Configuration for chat channels."""
+    """Configuration for chat channels.
+
+    Built-in and plugin channel configs are stored as extra fields (dicts).
+    Each channel parses its own config in __init__.
+    """
+
+    model_config = ConfigDict(extra="allow")
 
     send_progress: bool = True  # stream agent's text progress to the channel
     send_tool_hints: bool = False  # stream tool-call hints (e.g. read_file("…"))
-    whatsapp: WhatsAppConfig = Field(default_factory=WhatsAppConfig)
-    telegram: TelegramConfig = Field(default_factory=TelegramConfig)
-    discord: DiscordConfig = Field(default_factory=DiscordConfig)
-    feishu: FeishuConfig = Field(default_factory=FeishuConfig)
-    mochat: MochatConfig = Field(default_factory=MochatConfig)
-    dingtalk: DingTalkConfig = Field(default_factory=DingTalkConfig)
-    email: EmailConfig = Field(default_factory=EmailConfig)
-    slack: SlackConfig = Field(default_factory=SlackConfig)
-    qq: QQConfig = Field(default_factory=QQConfig)
-    matrix: MatrixConfig = Field(default_factory=MatrixConfig)
-    wecom: WecomConfig = Field(default_factory=WecomConfig)
 
 
 class AgentDefaults(Base):

tests/test_channel_plugins.py

@@ -0,0 +1,225 @@
+"""Tests for channel plugin discovery, merging, and config compatibility."""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+from unittest.mock import patch
+
+import pytest
+
+from nanobot.bus.events import OutboundMessage
+from nanobot.bus.queue import MessageBus
+from nanobot.channels.base import BaseChannel
+from nanobot.channels.manager import ChannelManager
+from nanobot.config.schema import ChannelsConfig
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+class _FakePlugin(BaseChannel):
+    name = "fakeplugin"
+    display_name = "Fake Plugin"
+
+    async def start(self) -> None:
+        pass
+
+    async def stop(self) -> None:
+        pass
+
+    async def send(self, msg: OutboundMessage) -> None:
+        pass
+
+
+class _FakeTelegram(BaseChannel):
+    """Plugin that tries to shadow built-in telegram."""
+    name = "telegram"
+    display_name = "Fake Telegram"
+
+    async def start(self) -> None:
+        pass
+
+    async def stop(self) -> None:
+        pass
+
+    async def send(self, msg: OutboundMessage) -> None:
+        pass
+
+
+def _make_entry_point(name: str, cls: type):
+    """Create a mock entry point that returns *cls* on load()."""
+    ep = SimpleNamespace(name=name, load=lambda _cls=cls: _cls)
+    return ep
+
+
+# ---------------------------------------------------------------------------
+# ChannelsConfig extra="allow"
+# ---------------------------------------------------------------------------
+
+def test_channels_config_accepts_unknown_keys():
+    cfg = ChannelsConfig.model_validate({
+        "myplugin": {"enabled": True, "token": "abc"},
+    })
+    extra = cfg.model_extra
+    assert extra is not None
+    assert extra["myplugin"]["enabled"] is True
+    assert extra["myplugin"]["token"] == "abc"
+
+
+def test_channels_config_getattr_returns_extra():
+    cfg = ChannelsConfig.model_validate({"myplugin": {"enabled": True}})
+    section = getattr(cfg, "myplugin", None)
+    assert isinstance(section, dict)
+    assert section["enabled"] is True
+
+
+def test_channels_config_builtin_fields_removed():
+    """After decoupling, ChannelsConfig has no explicit channel fields."""
+    cfg = ChannelsConfig()
+    assert not hasattr(cfg, "telegram")
+    assert cfg.send_progress is True
+    assert cfg.send_tool_hints is False
+
+
+# ---------------------------------------------------------------------------
+# discover_plugins
+# ---------------------------------------------------------------------------
+
+_EP_TARGET = "importlib.metadata.entry_points"
+
+
+def test_discover_plugins_loads_entry_points():
+    from nanobot.channels.registry import discover_plugins
+
+    ep = _make_entry_point("line", _FakePlugin)
+    with patch(_EP_TARGET, return_value=[ep]):
+        result = discover_plugins()
+
+    assert "line" in result
+    assert result["line"] is _FakePlugin
+
+
+def test_discover_plugins_handles_load_error():
+    from nanobot.channels.registry import discover_plugins
+
+    def _boom():
+        raise RuntimeError("broken")
+
+    ep = SimpleNamespace(name="broken", load=_boom)
+    with patch(_EP_TARGET, return_value=[ep]):
+        result = discover_plugins()
+
+    assert "broken" not in result
+
+
+# ---------------------------------------------------------------------------
+# discover_all — merge & priority
+# ---------------------------------------------------------------------------
+
+def test_discover_all_includes_builtins():
+    from nanobot.channels.registry import discover_all, discover_channel_names
+
+    with patch(_EP_TARGET, return_value=[]):
+        result = discover_all()
+
+    for name in discover_channel_names():
+        assert name in result
+
+
+def test_discover_all_includes_external_plugin():
+    from nanobot.channels.registry import discover_all
+
+    ep = _make_entry_point("line", _FakePlugin)
+    with patch(_EP_TARGET, return_value=[ep]):
+        result = discover_all()
+
+    assert "line" in result
+    assert result["line"] is _FakePlugin
+
+
+def test_discover_all_builtin_shadows_plugin():
+    from nanobot.channels.registry import discover_all
+
+    ep = _make_entry_point("telegram", _FakeTelegram)
+    with patch(_EP_TARGET, return_value=[ep]):
+        result = discover_all()
+
+    assert "telegram" in result
+    assert result["telegram"] is not _FakeTelegram
+
+
+# ---------------------------------------------------------------------------
+# Manager _init_channels with dict config (plugin scenario)
+# ---------------------------------------------------------------------------
+
+@pytest.mark.asyncio
+async def test_manager_loads_plugin_from_dict_config():
+    """ChannelManager should instantiate a plugin channel from a raw dict config."""
+    from nanobot.channels.manager import ChannelManager
+
+    fake_config = SimpleNamespace(
+        channels=ChannelsConfig.model_validate({
+            "fakeplugin": {"enabled": True, "allowFrom": ["*"]},
+        }),
+        providers=SimpleNamespace(groq=SimpleNamespace(api_key="")),
+    )
+
+    with patch(
+        "nanobot.channels.registry.discover_all",
+        return_value={"fakeplugin": _FakePlugin},
+    ):
+        mgr = ChannelManager.__new__(ChannelManager)
+        mgr.config = fake_config
+        mgr.bus = MessageBus()
+        mgr.channels = {}
+        mgr._dispatch_task = None
+        mgr._init_channels()
+
+    assert "fakeplugin" in mgr.channels
+    assert isinstance(mgr.channels["fakeplugin"], _FakePlugin)
+
+
+@pytest.mark.asyncio
+async def test_manager_skips_disabled_plugin():
+    fake_config = SimpleNamespace(
+        channels=ChannelsConfig.model_validate({
+            "fakeplugin": {"enabled": False},
+        }),
+        providers=SimpleNamespace(groq=SimpleNamespace(api_key="")),
+    )
+
+    with patch(
+        "nanobot.channels.registry.discover_all",
+        return_value={"fakeplugin": _FakePlugin},
+    ):
+        mgr = ChannelManager.__new__(ChannelManager)
+        mgr.config = fake_config
+        mgr.bus = MessageBus()
+        mgr.channels = {}
+        mgr._dispatch_task = None
+        mgr._init_channels()
+
+    assert "fakeplugin" not in mgr.channels
+
+
+# ---------------------------------------------------------------------------
+# Built-in channel default_config() and dict->Pydantic conversion
+# ---------------------------------------------------------------------------
+
+def test_builtin_channel_default_config():
+    """Built-in channels expose default_config() returning a dict with 'enabled': False."""
+    from nanobot.channels.telegram import TelegramChannel
+    cfg = TelegramChannel.default_config()
+    assert isinstance(cfg, dict)
+    assert cfg["enabled"] is False
+    assert "token" in cfg
+
+
+def test_builtin_channel_init_from_dict():
+    """Built-in channels accept a raw dict and convert to Pydantic internally."""
+    from nanobot.channels.telegram import TelegramChannel
+    bus = MessageBus()
+    ch = TelegramChannel({"enabled": False, "token": "test-tok", "allowFrom": ["*"]}, bus)
+    assert ch.config.token == "test-tok"
+    assert ch.config.allow_from == ["*"]

tests/test_dingtalk_channel.py

@@ -6,7 +6,7 @@ import pytest
 from nanobot.bus.queue import MessageBus
 import nanobot.channels.dingtalk as dingtalk_module
 from nanobot.channels.dingtalk import DingTalkChannel, NanobotDingTalkHandler
-from nanobot.config.schema import DingTalkConfig
+from nanobot.channels.dingtalk import DingTalkConfig
 
 
 class _FakeResponse:

tests/test_email_channel.py

@@ -6,7 +6,7 @@ import pytest
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.email import EmailChannel
-from nanobot.config.schema import EmailConfig
+from nanobot.channels.email import EmailConfig
 
 
 def _make_config() -> EmailConfig:

tests/test_matrix_channel.py

@@ -12,7 +12,7 @@ from nanobot.channels.matrix import (
     TYPING_NOTICE_TIMEOUT_MS,
     MatrixChannel,
 )
-from nanobot.config.schema import MatrixConfig
+from nanobot.channels.matrix import MatrixConfig
 
 _ROOM_SEND_UNSET = object()
 

tests/test_qq_channel.py

@@ -5,7 +5,7 @@ import pytest
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.qq import QQChannel
-from nanobot.config.schema import QQConfig
+from nanobot.channels.qq import QQConfig
 
 
 class _FakeApi:

tests/test_slack_channel.py

@@ -5,7 +5,7 @@ import pytest
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.slack import SlackChannel
-from nanobot.config.schema import SlackConfig
+from nanobot.channels.slack import SlackConfig
 
 
 class _FakeAsyncWebClient:

tests/test_telegram_channel.py

@@ -8,7 +8,7 @@ import pytest
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.telegram import TELEGRAM_REPLY_CONTEXT_MAX_LEN, TelegramChannel
-from nanobot.config.schema import TelegramConfig
+from nanobot.channels.telegram import TelegramConfig
 
 
 class _FakeHTTPXRequest: