MCP tool responses can have undefined output.output, causing TypeError
crashes in tool.execute.after hooks.
Changes:
- comment-checker/hook.ts: guard output.output with ?? '' before toLowerCase()
- edit-error-recovery/hook.ts: guard output.output with ?? '' before toLowerCase()
- task-resume-info/hook.ts: extract output.output ?? '' into outputText before all string operations
- Added tests for undefined output.output in edit-error-recovery and task-resume-info
MCP tools can return non-string results (e.g. structured JSON objects).
When this happens, output.output is undefined, causing TypeError crashes
in edit-error-recovery and delegate-task-retry hooks that call methods
like .toLowerCase() without checking the type first.
Add typeof string guard in both hooks, consistent with the existing
pattern used in tool-output-truncator.
- 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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