Test Coverage Fix

Fix test coverage for $ARGUMENTS (or the whole app if no argument is given). This skill enforces the 80% line coverage hard gate required for Dune app approval by finding AND fixing coverage gaps. Work through every step in order.

Step 1 — Verify test framework and coverage tooling

Check that the project has a working test framework with coverage configured:

# Check for vitest or jest in package.json
grep -E "(vitest|jest)" package.json

# Check for coverage configuration
cat vitest.config.ts 2>/dev/null || cat vitest.config.js 2>/dev/null || cat jest.config.ts 2>/dev/null || cat jest.config.js 2>/dev/null