# Tdd · youdotcom-oss

> Use test-driven development for behavior-changing feature or fix work, and whenever the user mentions TDD, test-first, red-green-refactor, tracer bullets, integration tests, or public-interface behavior tests. Skip for docs-only, path-only rename, formatting-only, or purely mechanical chores unless explicitly requested.

## Facts
- Page: https://tashan.sh/capability/skill-youdotcom-oss-tdd
- tashan id: skill:youdotcom-oss/tdd
- Source: https://github.com/youdotcom-oss/agent-skills
- Type: skill
- Category: devtools
- tashan score: 49.0 / 100
- Adoption: 14.0
- Upkeep: 97.0
- Freshness: 94.0
- 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 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 2026-08-09 by tashan (https://tashan.sh) from public evidence. Scorer s5.