Adding a Platform Adapter

User ↔ Messaging Platform ↔ Platform Adapter ↔ Gateway Runner ↔ AIAgent

~/.hermes/plugins/my-platform/
  plugin.yaml      # Plugin metadata
  adapter.py       # Adapter class + register() entry point

name: my-platform
label: My Platform
kind: platform
version: 1.0.0
description: My custom messaging platform adapter
author: Your Name
requires_env:
  - MY_PLATFORM_TOKEN          # bare string works
  - name: MY_PLATFORM_CHANNEL  # or rich dict for better UX
    description: "Channel to join"
    prompt: "Channel"
    password: false
optional_env:
  - name: MY_PLATFORM_HOME_CHANNEL
    description: "Default channel for cron delivery"
    password: false

provides_tools:
  - my_platform_call
  - my_platform_list

from gateway.platforms.base import (
    BasePlatformAdapter, SendResult, MessageEvent, MessageType,
)
from gateway.config import Platform, PlatformConfig


class MyPlatformAdapter(BasePlatformAdapter):
    def __init__(self, config: PlatformConfig):
        super().__init__(config, Platform("my_platform"))
        extra = config.extra or {}
        self.token = os.getenv("MY_PLATFORM_TOKEN") or extra.get("token", "")

    async def connect(self, *, is_reconnect: bool = False) -> bool:
        # Connect to the platform API, start listeners
        self._mark_connected()
        return True

    async def disconnect(self) -> None:
        self._mark_disconnected()

    async def send(self, chat_id, content, reply_to=None, metadata=None):
        # Send message via platform API
        return SendResult(success=True, message_id="...")

    async def get_chat_info(self, chat_id):
        return {"name": chat_id, "type": "dm"}


def check_requirements() -> bool:
    return bool(os.getenv("MY_PLATFORM_TOKEN"))


def validate_config(config) -> bool:
    extra = getattr(config, "extra", {}) or {}
    return bool(os.getenv("MY_PLATFORM_TOKEN") or extra.get("token"))


def _env_enablement() -> dict | None:
    token = os.getenv("MY_PLATFORM_TOKEN", "").strip()
    channel = os.getenv("MY_PLATFORM_CHANNEL", "").strip()
    if not (token and channel):
        return None
    seed = {"token": token, "channel": channel}
    home = os.getenv("MY_PLATFORM_HOME_CHANNEL")
    if home:
        seed["home_channel"] = {"chat_id": home, "name": "Home"}
    return seed


def register(ctx):
    """Plugin entry point — called by the Hermes plugin system."""
    ctx.register_platform(
        name="my_platform",
        label="My Platform",
        adapter_factory=lambda cfg: MyPlatformAdapter(cfg),
        # PASSIVE probe — "are deps/config present right now?".  Called from
        # status displays and config loading, so it must NEVER pip-install.
        check_fn=check_requirements,
        # ACTIVE installer (optional) — only for platforms with a
        # lazy-installable SDK.  create_adapter() calls it when check_fn
        # returns False, right before the gateway connects the platform.
        # Typically wraps tools.lazy_deps.ensure_and_bind(...).  Omit it
        # and a False check_fn is a hard block.
        # ensure_deps_fn=ensure_requirements,
        validate_config=validate_config,
        required_env=["MY_PLATFORM_TOKEN"],
        install_hint="pip install my-platform-sdk",
        # Env-driven auto-configuration — seeds PlatformConfig.extra from
        # env vars before adapter construction. See "Env-Driven Auto-
        # Configuration" section below.
        env_enablement_fn=_env_enablement,
        # Cron home-channel delivery support. Lets deliver=my_platform cron
        # jobs route without editing cron/scheduler.py. See "Cron Delivery"
        # section below.
        cron_deliver_env_var="MY_PLATFORM_HOME_CHANNEL",
        # Per-platform user authorization env vars
        allowed_users_env="MY_PLATFORM_ALLOWED_USERS",
        allow_all_env="MY_PLATFORM_ALLOW_ALL_USERS",
        # Message length limit for smart chunking (0 = no limit)
        max_message_length=4000,
        # LLM guidance injected into system prompt
        platform_hint=(
            "You are chatting via My Platform. "
            "It supports markdown formatting."
        ),
        # Display
        emoji="💬",
    )

    # Optional: register platform-specific tools
    ctx.register_tool(
        name="my_platform_search",
        toolset="my_platform",
        schema={...},
        handler=my_search_handler,
    )

gateway:
  platforms:
    my_platform:
      enabled: true
      extra:
        token: "..."
        channel: "#general"

async def _send_request(args, chat_id, platform_name, pconfig):
    # `args` contains the host-driven send request fields.
    message_id = await client.send(
        address=chat_id,
        body=args["message"],
        subject=args.get("subject"),
    )
    return {"success": True, "platform": platform_name,
            "chat_id": chat_id, "message_id": message_id}


def _parse_address(raw):
    normalized = raw.strip().lower()
    if normalized.startswith("@") and "@" in normalized[1:]:
        return normalized, None  # (chat_id, optional thread_id)
    return None                 # continue to channel-directory resolution


def _validate_address(address):
    # True accepts; False rejects; a string rejects with that diagnostic.
    return True if address.endswith("@example.com") else "unsupported domain"


def register(ctx):
    ctx.register_platform(
        name="fmsg",
        label="Fixture Message",
        adapter_factory=lambda cfg: FmsgAdapter(cfg),
        check_fn=check_requirements,
        parse_target_ref_fn=_parse_address,
        validate_target_ref_fn=_validate_address,
        # May be a regular function or async def. Hermes awaits any awaitable
        # result, including callable objects and functools.partial wrappers.
        send_message_handler=_send_request,
        # Prefer this lower-level hook when cron must send from a process
        # without the live gateway.
        standalone_sender_fn=_standalone_send,
    )

def _env_enablement() -> dict | None:
    """Seed PlatformConfig.extra from env vars.

    Called by the platform registry during load_gateway_config().
    Return None when the platform isn't minimally configured — the
    caller then skips auto-enabling. Return a dict to seed extras.

    The special 'home_channel' key is extracted and becomes a proper
    HomeChannel dataclass on the PlatformConfig; every other key is
    merged into PlatformConfig.extra.
    """
    token = os.getenv("MY_PLATFORM_TOKEN", "").strip()
    channel = os.getenv("MY_PLATFORM_CHANNEL", "").strip()
    if not (token and channel):
        return None
    seed = {"token": token, "channel": channel}
    home = os.getenv("MY_PLATFORM_HOME_CHANNEL")
    if home:
        seed["home_channel"] = {
            "chat_id": home,
            "name": os.getenv("MY_PLATFORM_HOME_CHANNEL_NAME", "Home"),
        }
    return seed


def register(ctx):
    ctx.register_platform(
        name="my_platform",
        label="My Platform",
        adapter_factory=lambda cfg: MyPlatformAdapter(cfg),
        check_fn=check_requirements,
        validate_config=validate_config,
        env_enablement_fn=_env_enablement,
        # ... other fields
    )

def _apply_yaml_config(yaml_cfg: dict, platform_cfg: dict) -> dict | None:
    """Translate config.yaml `my_platform:` keys into env vars / extras.

    yaml_cfg     — the full top-level parsed config.yaml dict
    platform_cfg — the platform's own sub-dict (yaml_cfg.get("my_platform", {}))

    May mutate os.environ directly (use `not os.getenv(...)` guards to
    preserve env > YAML precedence) and/or return a dict to merge into
    PlatformConfig.extra. Return None or {} for no extras.
    """
    if "require_mention" in platform_cfg and not os.getenv("MY_PLATFORM_REQUIRE_MENTION"):
        os.environ["MY_PLATFORM_REQUIRE_MENTION"] = str(platform_cfg["require_mention"]).lower()
    allowed = platform_cfg.get("allowed_channels")
    if allowed is not None and not os.getenv("MY_PLATFORM_ALLOWED_CHANNELS"):
        if isinstance(allowed, list):
            allowed = ",".join(str(v) for v in allowed)
        os.environ["MY_PLATFORM_ALLOWED_CHANNELS"] = str(allowed)
    return None  # nothing extra to merge into PlatformConfig.extra

def register(ctx):
    ctx.register_platform(
        name="my_platform",
        ...,
        apply_yaml_config_fn=_apply_yaml_config,
    )

ctx.register_platform(
    name="my_platform",
    ...
    cron_deliver_env_var="MY_PLATFORM_HOME_CHANNEL",
)

async def _standalone_send(
    pconfig,
    chat_id,
    message,
    *,
    thread_id=None,
    media_files=None,
    force_document=False,
):
    """Open an ephemeral connection / acquire a fresh token, send, and close."""
    # ... open connection, send message, return result ...
    return {"success": True, "message_id": "..."}
    # or {"error": "..."}

ctx.register_platform(
    name="my_platform",
    ...
    cron_deliver_env_var="MY_PLATFORM_HOME_CHANNEL",
    standalone_sender_fn=_standalone_send,
)

# plugins/platforms/my_platform/plugin.yaml
name: my_platform-platform
label: My Platform
kind: platform
version: 1.0.0
description: >
  My Platform gateway adapter for Hermes Agent.
author: Your Name
requires_env:
  - name: MY_PLATFORM_TOKEN
    description: "Bot API token from the My Platform console"
    prompt: "My Platform bot token"
    url: "https://my-platform.example.com/bots"
    password: true
  - name: MY_PLATFORM_CHANNEL
    description: "Channel to join (e.g. #hermes)"
    prompt: "Channel"
    password: false
optional_env:
  - name: MY_PLATFORM_HOME_CHANNEL
    description: "Default channel for cron delivery (defaults to MY_PLATFORM_CHANNEL)"
    prompt: "Home channel (or empty)"
    password: false
  - name: MY_PLATFORM_ALLOWED_USERS
    description: "Comma-separated user IDs allowed to talk to the bot"
    prompt: "Allowed users (comma-separated)"
    password: false

class LineAdapter(BasePlatformAdapter):
    async def _keep_typing(self, chat_id: str, *args, **kwargs) -> None:
        if self.slow_response_threshold <= 0:
            await super()._keep_typing(chat_id, *args, **kwargs)
            return

        async def _fire_at_threshold() -> None:
            try:
                await asyncio.sleep(self.slow_response_threshold)
            except asyncio.CancelledError:
                raise
            # Platform-specific work here — for LINE, send a Template
            # Buttons "Get answer" bubble using the cached reply token
            # so the user can fetch the cached response later via a
            # fresh (free) reply token from the postback callback.
            await self._send_slow_response_button(chat_id)

        side_task = asyncio.create_task(_fire_at_threshold())
        try:
            await super()._keep_typing(chat_id, *args, **kwargs)
        finally:
            if not side_task.done():
                side_task.cancel()
                try:
                    await side_task
                except (asyncio.CancelledError, Exception):
                    pass

async def send(self, chat_id: str, content: str, **kw) -> SendResult:
    if _is_system_bypass(content):
        return await self._send_text_chunks(chat_id, content, force_push=False)
    pending_rid = self._pending_buttons.get(chat_id)
    if pending_rid:
        self._cache.set_ready(pending_rid, content)
        return SendResult(success=True, message_id=pending_rid)
    return await self._send_text_chunks(chat_id, content, force_push=False)

class Platform(Enum):
    # ... existing platforms ...
    NEWPLAT = "newplat"

from gateway.config import Platform, PlatformConfig
from gateway.platforms.base import (
    BasePlatformAdapter, MessageEvent, MessageType, SendResult,
)

def check_newplat_requirements() -> bool:
    """Return True if dependencies are available."""
    return SOME_SDK_AVAILABLE

class NewPlatAdapter(BasePlatformAdapter):
    def __init__(self, config: PlatformConfig):
        super().__init__(config, Platform.NEWPLAT)
        # Read config from config.extra dict
        extra = config.extra or {}
        self._api_key = extra.get("api_key") or os.getenv("NEWPLAT_API_KEY", "")

    async def connect(self, *, is_reconnect: bool = False) -> bool:
        # Set up connection, start polling/webhook
        self._mark_connected()
        return True

    async def disconnect(self) -> None:
        self._running = False
        self._mark_disconnected()

    async def send(self, chat_id, content, reply_to=None, metadata=None):
        # Send message via platform API
        return SendResult(success=True, message_id="...")

    async def get_chat_info(self, chat_id):
        return {"name": chat_id, "type": "dm"}

source = self.build_source(
    chat_id=chat_id,
    chat_name=name,
    chat_type="dm",  # or "group"
    user_id=user_id,
    user_name=user_name,
)
event = MessageEvent(
    text=content,
    message_type=MessageType.TEXT,
    source=source,
    message_id=msg_id,
)
await self.handle_message(event)

PLATFORM_HINTS = {
    # ...
    "newplat": (
        "You are chatting via NewPlat. It supports markdown formatting "
        "but has a 4000-character message limit."
    ),
}

# Find every .py file mentioning the reference platform
search_files "bluebubbles" output_mode="files_only" file_glob="*.py"

# Find every .py file mentioning the new platform
search_files "newplat" output_mode="files_only" file_glob="*.py"

# Any file in the first set but not the second is a potential gap

async def connect(self):
    self._poll_task = asyncio.create_task(self._poll_loop())
    self._mark_connected()

async def _poll_loop(self):
    while self._running:
        messages = await self._fetch_updates()
        for msg in messages:
            await self.handle_message(self._build_event(msg))

async def connect(self):
    self._app = web.Application()
    self._app.router.add_post("/callback", self._handle_callback)
    # ... start aiohttp server
    self._mark_connected()

async def _handle_callback(self, request):
    event = self._build_event(await request.text())
    await self._message_queue.put(event)
    return web.Response(text="success")  # Acknowledge immediately

from gateway.status import acquire_scoped_lock, release_scoped_lock

async def connect(self, *, is_reconnect: bool = False):
    acquired, _existing = acquire_scoped_lock("newplat", self._token)
    if not acquired:
        logger.error("Token already in use by another profile")
        return False
    # ... connect

async def disconnect(self):
    release_scoped_lock("newplat", self._token)