703-technologies-fuzzing-testing

# Java fuzz testing with CATS Design and implement contract-driven fuzz testing for Java APIs using CATS to uncover edge cases and input-validation defects early. **What is covered in this Skill?** - CATS setup and baseline command usage for OpenAPI-driven fuzzing - Negative testing strategy for invalid payloads, missing fields, wrong types, and malformed values - Boundary testing for size, range, format, and enum constraints - CI integration patterns with actionable logs and reproducible failures - Local execution workflow for contributors before opening pull requests - Reporting and triage practices for fuzzing findings **Scope:** Focus on HTTP API fuzzing and contract validation with CATS. Use this skill to define practical, repeatable checks in both local and CI workflows. ## Constraints Before applying any fuzz testing changes, ensure the project compiles. If compilation fails, stop immediately. After implementation, regenerate skills and run verification. - **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any change - **SAFETY**: If compilation fails, stop immediately and do not proceed - **MANDATORY**: Regenerate skills with `./mvnw clean install -pl skills-generator` after editing skill XML - **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements - **BEFORE APPLYING**: Read the reference for detailed examples, good/bad patterns, and constraints ## When to use this skill - Add fuzz testing to a Java project ...