Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.
Install
npx skills add antfu/skills --skill vitestnpx skills add antfu/skills --skill vitest -a claude-code -gnpx skills add antfu/skills --skill vitest -a codex -ggemini skills install https://github.com/antfu/skills.git --path skills/vitestgh skill install antfu/skills vitestgit clone --depth 1 https://github.com/antfu/skills /tmp/antfu__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/antfu__skills/skills/vitest ~/.claude/skills/vitest # Claude Code
cp -R /tmp/antfu__skills/skills/vitest ~/.agents/skills/vitest # Codex, Cursor, Gemini CLI, Copilot, OpenCode