Resonate Hq

Resonate Hq is a durable execution system built around async/await code. It is meant for cases where applications need retries, timeouts, idempotency handling, and recovery after a process crash, while letting developers keep the workflow in ordinary asynchronous functions.

Its core model centers on a durable promise. The page describes three main context verbs: ctx.run to execute a step durably, ctx.rpc to call another function, and ctx.sleep to wait for a short or long period. It also mentions ctx.detached for starting work without waiting on it. The same app can use any stack, and the workflow is described as the shape of the code. The documentation also refers to a durable execution protocol and says Resonate is an implementation of it.

Deployment is designed to run alongside an existing application stack. The server runs as a single binary beside the app, while storage and message transport can use a database or queue already in use. The page names Postgres, HTTP, and NATS in this context, and says the state lives in the user’s own Postgres. It also says workflow state can be inspected with the CLI: resonate tree prints a call graph and resonate promises get inspects a single step. The page further says the state can be read directly in Postgres.

Resonate is open source under Apache 2.0. The page says the protocol, server, SDKs, and tools are all Apache 2.0, and it also states that the specification is open and that users can run, read, fork, or build their own implementation.