The canalhandia PR review lost all findings because the agent ran out of
context before emitting the closing json fence. Three failure modes hit
the old regex \{.*?\}:
* nested objects inside the fence truncated at the first }
* bare arrays (no {summary, findings} wrapper) returned []
* unfenced JSON in the prose tail was never reached (first not last)
Replace the regex with a balanced-brace scanner:
* _last_json_block walks the fence contents with a depth counter so
nested objects survive
* _last_balanced_json + _balanced_json_substring handle bare arrays and
prose-tail JSON when no fence is present
* _parse_json_tolerant returns list as well as dict; parse_findings and
parse_review_output accept a bare array as the outer value
Agent prompt tightened: reserve the final step for emitting the JSON
block so the analysis isn't lost when context runs out.
10 new tests in tests/pilot/test_ai_review.py cover the new shapes.
Co-Authored-By: Claude <noreply@anthropic.com>
Marcos
5302e8dcd7