Three hooks crashed with TypeError when MCP tools returned results where
output.output is undefined. Added type guards to all affected hooks:
- comment-checker/hook.ts: guard before toLowerCase()
- edit-error-recovery/hook.ts: guard before toLowerCase()
- task-resume-info/hook.ts: guard before startsWith()/includes()/trimEnd()
- Added test for undefined output.output in edit-error-recovery
Fixes#1746
- Detects Edit tool errors (oldString/newString mismatches)
- Injects system reminder forcing AI to read file, verify state, apologize
- Includes comprehensive test suite (8 tests)
- Integrates with hook system and configuration schema
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YeonGyu-Kim