kollabor-rpc 0.5.19

RPC transport for Kollabor (StateService foundation)

kollabor-rpc

kollabor-rpc is the lightweight RPC transport foundation for Kollabor daemon and attach-mode state access.

It provides request/response models, error types, a method-dispatch server, a client, and Unix-socket transport helpers. The current package is intentionally small and stdlib-only.

Current Role

• Represent RPC requests and responses with stable IDs.
• Dispatch named methods to async handlers.
• Provide client helpers for request/response calls.
• Wrap common RPC errors such as timeout, missing method, and handler failure.
• Provide Unix socket connection helpers with a larger buffer limit.

Architecture

Module	Responsibility
models.py	RpcRequest, RpcResponse, request ID helpers
errors.py	RPC exception hierarchy
server.py	handler registration and dispatch
client.py	request client abstraction
transport.py	Unix transport helpers and buffer settings

Usage

from kollabor_rpc import RpcServer

server = RpcServer()


async def ping(params):
    return {"ok": True, "echo": params.get("echo")}


server.register("ping", ping)
reply = await server.handle_wire({
    "request_id": "req_1",
    "method": "ping",
    "params": {"echo": "hello"},
})

Known Gaps

• This package is still a transport foundation; higher-level StateService method contracts live outside the package.
• Wire-format compatibility should be documented alongside the hub/attach socket protocol.
• Current tests focus on integration through hub sockets; package-local unit coverage should grow as the API stabilizes.

Roadmap

Phase 1: Contract docs

• Document the exact frame format used by attach clients and hub sockets.
• Add examples for both direct dispatch and socket-backed clients.
• Clarify which errors are transport failures versus handler failures.

Phase 2: StateService integration

• Keep RPC generic, but document the StateService method namespace that uses it.
• Add contract tests for high-value state methods.
• Add compatibility checks for attached streaming and request/reply flows.

Phase 3: Operational hardening

• Add timeout/cancellation guidance for callers.
• Improve observability for slow handlers and failed frames.
• Keep the package stdlib-only unless a transport dependency becomes essential.

Development

Targeted validation examples:

python -m py_compile packages/kollabor-rpc/src/kollabor_rpc/*.py
python -m pytest tests/test_hub_rpc_integration.py -q

Dependencies

None. This package is intentionally stdlib-only.

License

MIT