cloacina-client

Python SDK for cloacina-server — a typed REST client plus WebSocket execution-event streaming, for Python 3.10+.

This is the service client. It talks to a running cloacina-server over HTTP/WebSocket. The embedded workflow runtime is the separate cloaca package — the two are deliberately distinct.

Version lockstep: cloacina-client X.Y.Z is generated from, tested against, and only supported on cloacina-server X.Y.Z.

Install

pip install cloacina-client

Quickstart

from cloacina_client import Client

client = Client("http://localhost:8080", api_key="clk_...", tenant="public")

accepted = client.execute_workflow("my_workflow", {"input": 42})
print(accepted.execution_id)

for execution in client.iterate_executions(status="Failed"):
    print(execution.id, execution.workflow_name)

Every helper raises CloacinaApiError (with .status and the server's machine-readable .code) on non-2xx responses. The generated openapi-python-client client is available as client.generated for anything the shim doesn't cover.

Async + live execution events

import asyncio
from cloacina_client import AsyncClient

async def main():
    client = AsyncClient("http://localhost:8080", api_key="clk_...")
    accepted = await client.execute_workflow("my_workflow", {"input": 42})
    # Reconnect, dedup, and acks are handled for you.
    async for event in client.follow_execution_events(accepted.execution_id):
        print(event)

asyncio.run(main())

WebSocket connections never carry the long-lived key: the SDK mints a single-use, 60-second ticket (POST /v1/auth/ws-ticket) per connection. A 4426 close (protocol version mismatch) raises ProtocolVersionError — upgrade the SDK.

Regenerating

src/cloacina_client/_generated/ is produced by a pinned generator from the committed server contract:

uvx openapi-python-client@0.29.0 generate \
  --path ../../docs/static/openapi.json \
  --config generator-config.yaml --meta none \
  --output-path src/cloacina_client/_generated --overwrite

The pin is enforced, not just documented: scripts/check_python_sdk_generated.py regenerates into a temp directory and fails CI if the committed tree differs. Change the version in that script and in the recipe above together — they are the same pin, and the script is the half that CI reads.

This gate exists because the two drifted apart once already: the committed output had been produced by a different generator build than this README named, and regenerating with the documented version rewrote ~100 files and introduced an import (typing_extensions) that was not a declared dependency.

Contract tests

tests/test_contract.py exercises every documented endpoint plus the WebSocket lifecycle against a live server:

CLOACINA_SERVER_URL=http://localhost:8080 \
CLOACINA_API_KEY=<bootstrap-key> \
uv run pytest

The full execute→event-stream flow (which needs a compiled .cloacina package) runs in the repo's angreal test sdk-contract harness.