The API returned 200 but the user got no complete answer. Why?
Practice this question- Streaming headers may have been sent before an error or disconnect.
- I inspect terminal events and run/message status rather than HTTP code alone, then check provider completion, validation, cancellation, and persistence spans.
Adapted from 13_AI.MD · “29.16 Observability”. Code examples are study fragments. Difficulty and core labels are editorial estimates; version-specific behavior should be checked against your project.