Coverage Guard

Use when the user wants to check test coverage, enforce 100% coverage, find uncovered code, add missing tests, or increase code coverage. Works with vitest, jest, react-scripts, and other test runners. Also for 'coverage', 'test coverage', 'cover', 'untested', 'uncovered', 'add tests for', 'increase coverage', 'coverage report', 'write tests', 'test all files'.

4 stars 1 forksTesting & QA

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add sametcelikbicak/coverage-guard --skill Coverage Guard

Manual install

git clone --depth 1 https://github.com/sametcelikbicak/coverage-guard.git /tmp/coverage-guard
mkdir -p ~/.claude/skills
cp -r /tmp/coverage-guard/. ~/.claude/skills/Coverage-Guard

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Coverage Guard

Ensure 100% test coverage for any JavaScript/TypeScript project. Automatically detects the test runner, sets up test infrastructure if missing, writes tests for uncovered components, and loops until every file reaches 100% coverage.

## Overview

This skill follows a complete pipeline:

1. **Detect** runner & infrastructure → 2. **Scan** source files & tests → 3. **Setup** if missing → 4. **Generate** new tests → 5. **Run** coverage → 6. **Fill** gaps → 7. **Verify** → repeat until 100%

---

## Step-by-step Workflow

### Phase 1: Detect environment

Check `package.json` in the project root to determine:

```bash
cat package.json
```

Identify the test runner and coverage tool:

| Indicator | Runner | Coverage command |
|---|---|---|
| `"vitest"` in devDependencies | **Vitest** | `npx vitest --coverage` |
| `"jest"` in devDependencies | **Jest** | `npx jest --coverage` |
| `"react-scripts"` in devDependencies | **react-scripts (Jest)** | `npx react-scripts test --coverage` |
| `"next"` in devDependencies | **Next.js (Jest)** | `npx next test --coverage` or check `jest.config` |
| `"@angular/core"` in dependencies | **Angular (Karma/Jasmine)** | `ng test --code-coverage` |
| `"@playwright/test"` in devDependencies | **Playwright** | `npx playwright test` (no built-in coverage; use `@playwright/test` with `istanbul`) |
| `"mocha"` in devDependencies | **Mocha** | `npx mocha` (coverage via c8/nyc) |

Read the full skill on GitHub

Details

Skill name: Coverage Guard
Repository: sametcelikbicak/coverage-guard
License: MIT
Repo updated: 11 September 2026
Listed in: heilcheng/awesome-agent-skills

FAQ

What does the Coverage Guard skill do?

How do I install the Coverage Guard skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add sametcelikbicak/coverage-guard --skill Coverage Guard. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Coverage Guard popular?

It lives in sametcelikbicak/coverage-guard, which has 4 GitHub stars and 1 forks, and is included in 1 curated skill list.

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