# Apd Tdd

> MANDATORY during the APD builder phase on Codex (between apd:apdadvancepipeline('spec', ...) and apd:apdadvancepipeline('builder')) whenever implementing a feature, fixing a bug, or writing new code. Write a FAILING test first, watch it fail, write minimal code to pass, refactor while green. Every file write goes through apd:apdguardwrite(apdrole, filepath); scope is enforced server-side from .apd/agents/<apdrole.md. Triggers on "implement", "add feature", "fix bug", "write code", "TDD", "test-first", "builder".

## Facts
- Page: https://tashan.sh/capability/skill-zstevovich-apd-tdd
- tashan id: skill:zstevovich/apd-tdd
- Source: https://github.com/zstevovich/claude-apd
- Type: skill
- Category: devtools
- 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-tdd ~/.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.