Coverage Guard

An AI agent skill that enforces 100% test coverage for any JavaScript/TypeScript project. Works with Vitest, Jest, react-scripts, and other test runners. Compatible with opencode, Claude Code, Cursor, Windsurf, and GitHub Copilot.

What it does

• Auto-detects your test runner (Vitest, Jest, react-scripts, etc.)
• Scans all source files and maps them to existing tests
• Writes tests for components/modules that have no tests
• Updates existing tests to fill coverage gaps
• Sets up test infrastructure if missing (interactive setup)
• Loops until 100% coverage is achieved

Install

# opencode — copy to project
cp -r coverage-guard .opencode/skills/

# or via agentskill.sh
/learn @sametcelikbicak/coverage-guard

Supported runners

• Vitest
• Jest
• react-scripts (CRA)
• Next.js
• Angular (Karma/Jasmine)
• Mocha
• Playwright
• Cypress
• AVA

License

MIT