AGUI303

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

Message: STATE_DELTA is not a valid RFC 6902 patch document: {error}

Spec grounding

The StateDelta event contains incremental updates to the agent's state in the form of JSON Patch operations (as defined in RFC 6902).

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

Example

A violating stream from the corpus (spec/fixtures/invalid/AGUI303-invalid-patch-document):

{"type":"RUN_STARTED","threadId":"thread_001","runId":"run_001","timestamp":1755300017000}
{"type":"STATE_SNAPSHOT","snapshot":{},"timestamp":1755300017100}
{"type":"STATE_DELTA","delta":[{"op":"merge","path":"/a","value":1}],"timestamp":1755300017200}
{"type":"RUN_FINISHED","threadId":"thread_001","runId":"run_001","outcome":{"type":"success"},"timestamp":1755300017300}

Expected findings:

• error AGUI303 at event 2 — STATE_DELTA is not a valid RFC 6902 patch document: operation 0 has invalid op 'merge'