RUNTIME_REQUIRED

What failed

A runtime-bound API such as flow.waitFor(), flow.defer(), flow.after(), flow.untilIdle(), crux.flows.*, or createRuntimeHandler() was called without config({ runtime }).

Why

Crux needs a runtime to resolve durable target names, persist waiter/timer/task state, and wake work after the current call exits.

What still works

Object-bound flow APIs still work when your code has the flow handle: flow.suspend(), reviewFlow.signal(...), and reviewFlow.run({ resume: flowId }).

Fix

Add a runtime in crux.config.ts:

runtime: serverless({ store: postgres(), wake: qstash() })

Use runtime: node() for local development and tests.