Resonate Basic Ephemeral World Usage — Python

Overview

The ephemeral world is anywhere your Python process starts: a main(), a FastAPI route, an HTTP handler, a script, a worker entry point. You use the Resonate class to register durable functions and invoke them. Once an invocation starts, it crosses into the durable world and Resonate guarantees its completion — retries on failure, resumes after crashes, continues across restarts.

This skill covers the Client API surface. The Durable World (Context APIs) lives in resonate-basic-durable-world-usage-python.

Preconditions

• Python ≥ 3.12 (the SDK uses recent typing features).
• resonate-sdk on PyPI.
• A running Resonate server (resonate dev starts one on localhost:8001). The Rust server v0.9.x runs on a single port — no separate store port.

Install