agim

One stateless interface for IM login, receive, and send. agim is a plain SDK: it owns no storage, no plugin registry, and no host concepts. Callers persist the login handshake and receive cursor themselves and hand them back on the next call.

Interface

class IMClient(ABC):
    async def login(self) -> LoginHandshake: ...
    async def is_login(self, handshake: LoginHandshake) -> LoginState: ...
    async def receive(self, cursor: str | None = None) -> ReceiveResult: ...
    async def send(self, chat_id: str, text: str, *, context_token: str | None = None) -> None: ...
    async def aclose(self) -> None: ...

Because nothing is stored inside agim:

• login() returns the QR payload and the provider state needed to poll it. Persist the whole LoginHandshake, then pass it back to is_login().
• receive() returns the message and the next cursor. Persist the cursor, then pass it to the next receive().
• send() takes the context token the caller stored from the inbound message.

One getupdates poll can carry several messages. receive() still hands over exactly one message per call: the rest of the batch waits in memory (oldest first), and the returned cursor only advances past the batch once its last message has been handed over, so a restart mid-batch re-delivers that batch instead of dropping the messages behind the first one.

Platform clients

WeChatClient implements the Tencent personal WeChat iLink/ClawBot protocol used by Tencent's official openclaw-weixin project: QR login, getupdates long polling, and sendmessage. More platforms (for example Discord) implement the same IMClient surface.

Inbound messages carry their attachments on InboundMessage.media, one InboundMedia per image, voice note, file, or video. The client downloads the CDN reference and removes the AES-128-ECB encryption before returning, so a caller receives usable bytes; whether a given consumer reads an image, plays a voice note, or ignores both is the caller's decision. An item that cannot be downloaded or decrypted is logged and skipped: the message keeps the [image]/[voice]/[file]/[video] placeholder in its text. An item over MAX_MEDIA_BYTES raises MediaTooLargeError from fetch_media and is reported on InboundMessage.rejected_media, so a caller can tell the sender that the attachment was refused instead of losing it quietly.

Storage

None. Whoever calls agim owns persistence.