# Apd Debug

> MANDATORY before re-dispatching the builder after any APD verifier block or critical reviewer finding on Codex. Use on any bug, test failure, build failure, error, crash, regression, or unexpected behavior. Four-phase systematic debugging — root cause investigation, pattern analysis, hypothesis + controlled test, fix with TDD. Escalate after three failed hypotheses instead of piling on more guesses. Triggers on "bug", "fail", "failing", "broken", "doesn't work", "error", "crash", "regression", "verifier blocked", "reviewer rejected".

## Facts
- Page: https://tashan.sh/capability/skill-zstevovich-apd-debug
- tashan id: skill:zstevovich/apd-debug
- Source: https://github.com/zstevovich/claude-apd
- Type: skill
- Category: other
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 62.0
- Freshness: 95.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- License: MIT
- Official: no

## Install

```sh
cp -r apd-debug ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-16 by tashan (https://tashan.sh) from public evidence. Scorer s5.