Use Schemathesis when an agent needs to turn an API schema into broad negative and edge-case coverage instead of hand-writing examples. The skill exercises live endpoints or app hooks, explores unexpected combinations, and reports failures that ordinary happy-path tests miss.
Configure perform API fuzzing to discover edge cases, crashes, and security vulnerabilities. Use when performing specialized testing. Trigger with phrases like "fuzz the API", "run fuzzing tests", or "discover edge cases".