Worked on the semgrep/semgrep-rules and semgrep/semgrep-interfaces repositories, focusing on security and schema enhancements. Enhanced security rule validation by updating and expanding tests for the No-Auth-Over-HTTP rule, ensuring better coverage of insecure HTTP contexts and maintaining alignment with recent code changes. Standardized rule ID comments to improve maintainability and traceability. Later, implemented a rule schema enhancement by introducing fully qualified name fields, enabling more precise rule naming while preserving backward compatibility for legacy CLI versions. Leveraged OCaml, Python, and YAML, applying skills in security analysis, data modeling, schema definition, and testing to deliver robust, maintainable improvements.