Property-based and generative testing across the polyglot stack. TRIGGER when: user asks about property-based testing, generative testing, QuickCheck, Hypothesis, proptest, StreamData, fast-check, fuzzing test inputs, or finding edge cases that example tests miss. DO NOT TRIGGER when: user asks about TDD workflow (use tdd), mutation testing (use tdd), load testing (use performance-profiler), or security fuzzing (use security-auditor).
