# Vitest Regression Authoring

> Add focused regression tests for backend, state, contract, and utility bugs.

- Skill: `onfire7777/vitest-regression-authoring` (Agent Skill)
- Install (CLI): `npx skillmds@latest add onfire7777/vitest-regression-authoring`
- Raw SKILL.md: https://api.skillmd.com/api/skills/onfire7777/vitest-regression-authoring/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: onfire7777 (https://skillmd.com/u/onfire7777)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/onfire7777/vitest-regression-authoring

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# Vitest Regression Authoring

- Reproduce the bug first when possible.
- Test the contract or behavior, not incidental internals.
- Keep fixtures small.
- Run the targeted test and then the relevant verification tier.