Greptile Summary

Added defensive guards to prevent crashes when media-understanding receives malformed data. The implementation properly handles cases where attachments or attempts arrays are undefined or non-arrays by using Array.isArray() checks and optional chaining.

Changes:

• selectAttachments and orderAttachments now guard against undefined/non-array attachments parameters
• formatDecisionSummary guards against malformed decision.attachments and entry.attempts arrays
• Added comprehensive test coverage for all guard scenarios

Code Quality:

• Defensive programming approach prevents runtime crashes from malformed input
• Guards are placed early in functions before any array operations
• Optional chaining (?.) consistently used for safe property access
• Test coverage validates both undefined and non-array edge cases
• Implementation follows repository TypeScript style guidelines

Confidence Score: 5/5

• Safe to merge with high confidence
• The changes are defensive guards that only improve safety without altering existing logic. The implementation is straightforward, well-tested, and follows best practices. All edge cases are properly handled with Array.isArray() checks and optional chaining. The test coverage validates the guard behavior for both undefined and non-array inputs.
• No files require special attention

_{Last reviewed commit: 705b8ad}

Landed via temp rebase onto main.

• Gate: pnpm vitest src/media-understanding/attachments.guards.test.ts src/media-understanding/runner.entries.guards.test.ts
• Land commit: d4f3bf141e0097cfe2e1b521d6c918f32aab159d
• Merge commit: 9c9ab89

Thanks @claw9267!