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systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior — before proposing fixes.

plugins/yimwoo/hotl-plugin/skills/systematic-debugging/SKILL.md

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# Systematic Debugging

## Four Phases

### Phase 1: Reproduce
- Get a minimal, reliable reproduction
- Never fix what you can't reproduce

### Phase 2: Understand
- Read the error message fully — the answer is often there
- Trace the call path from symptom to root cause
- Check: recent changes, environment differences, assumptions about inputs

### Phase 3: Hypothesize