Three Ollama-gated integration tests covering:
- stderr lines parse as answer_event.v1 (retrieval_done first,
final last, all carry RFC3339 ts).
- stdout final line is answer.v1 (backwards compat).
- non-stream path (--json without --stream) unchanged.
- BrokenPipe stderr → child terminates cleanly via cancel
propagation through pipeline SendError.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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