Mutation Testing

Mutation testing answers: "Would my tests catch this bug?" by actually introducing bugs and running tests.

Execution Workflow

CRITICAL: This skill actually mutates code and runs tests. Follow this exact process:

Step 1: Identify Target Code

# Get changed files on the branch
git diff main...HEAD --name-only | grep -E '\.(ts|js|tsx|jsx|vue)$' | grep -v '\.test\.' | grep -v '\.spec\.'

Step 2: For Each Function to Test