AGUI006

Severity: error · Group: Lifecycle · Checked in: core · Since: 0.x

Message: STEP_FINISHED '{stepName}' has no open STEP_STARTED

Spec grounding

The stepName must match the corresponding StepStarted event.

Source: https://docs.ag-ui.com/concepts/events#stepfinished

Example

A violating stream from the corpus (spec/fixtures/invalid/AGUI006-step-finished-unmatched):

{"type":"RUN_STARTED","threadId":"thread_001","runId":"run_001","timestamp":1755300009600}
{"type":"STEP_FINISHED","stepName":"plan","timestamp":1755300009700}
{"type":"RUN_FINISHED","threadId":"thread_001","runId":"run_001","outcome":{"type":"success"},"timestamp":1755300009800}

Expected findings:

• error AGUI006 at event 1 — STEP_FINISHED 'plan' has no open STEP_STARTED