security-test-generator

Use when developer is writing tests, asked to add test coverage, writing Jest/Mocha/pytest/JUnit test files, or when reviewing an endpoint that has only happy-path tests. Also triggers when developer says "write tests for this", "add test coverage", or "what should I test here". Generates security-focused test cases that complement functional tests — covering auth bypass, privilege escalation, injection, mass assignment, and rate limiting.