AGUI105

Severity: warning · Group: Text messages · Checked in: core · Since: 0.x

Message: TEXT_MESSAGE_CONTENT for messageId '{messageId}' has an empty delta

Spec grounding

delta: Text content chunk (non-empty)

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

The spec is not fully explicit here; the ambiguity is tracked as SQ-2 and the severity is capped accordingly (false positives are worse than false negatives).

Example

A violating stream from the corpus (spec/fixtures/invalid/AGUI105-empty-content-delta):

{"type":"RUN_STARTED","threadId":"thread_001","runId":"run_001","timestamp":1755300012000}
{"type":"TEXT_MESSAGE_START","messageId":"msg_001","role":"assistant","timestamp":1755300012100}
{"type":"TEXT_MESSAGE_CONTENT","messageId":"msg_001","delta":"","timestamp":1755300012200}
{"type":"TEXT_MESSAGE_END","messageId":"msg_001","timestamp":1755300012300}
{"type":"RUN_FINISHED","threadId":"thread_001","runId":"run_001","outcome":{"type":"success"},"timestamp":1755300012400}

Expected findings:

• warning AGUI105 at event 2 — TEXT_MESSAGE_CONTENT for messageId 'msg_001' has an empty delta