# Test Coverage Review

> Evaluate test quality, coverage, and adherence to TDD practices

- Skill: `jwilger/test-coverage-review` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jwilger/test-coverage-review`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jwilger/test-coverage-review/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT
- Author: jwilger (https://skillmd.com/u/jwilger)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jwilger/test-coverage-review

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## What I do
- Verify tests were written before implementation (TDD)
- Check acceptance tests exist for features
- Review property-based test coverage for invariants
- Validate nutype validator tests
- Identify missing edge cases

## When to use me
Use this skill when reviewing PRs, after implementing features, or when test quality is in question.

## Review Checklist
- [ ] Failing test exists for every bug fix
- [ ] Acceptance tests cover end-to-end behavior
- [ ] Unit tests cover edge cases
- [ ] Property-based tests cover invariants
- [ ] Nutype validators have boundary tests
- [ ] Tests are fast and deterministic