Found by running the reviewer against this branch. The second review of PR #7
ran a full agent loop — 330s of a 540s budget, no timeout — and ended without a
parseable ```json block. The code discarded the entire run and posted "AI review
produced no parseable output.", losing minutes of work and millions of tokens
for a message that tells the maintainer nothing and gives me nothing to debug.
Three changes on that path:
- salvage_summary() keeps the agent's prose (fenced blocks stripped, tail kept
because the conclusion is written last) and posts it under an explicit banner
saying it is unstructured and its line numbers were never validated against
the diff. A partial review honestly labelled beats no review.
- The raw output's length and last 600 chars go to stderr, so the next
occurrence is diagnosable from pod logs instead of invisible.
- The AI-USAGE section is still rendered. The label asked for it and the tokens
were spent either way; dropping the measurement on the failure path is how the
cost model stops getting calibration data exactly when it is most interesting.
Not fixed here: why the agent went off-format. The likely cause is the 40-step
cap in the agent definition being reached on a larger diff (the successful run
used 28), which wants either a higher cap or a step-budget warning in the
prompt. Needs the next occurrence's stderr to confirm rather than guess.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B11e8TZZxJyzHW7jj7KWUN
Marcos
5d28f97080