Gabriel Herrera developed foundational features for the hamc/fatec20251 repository, focusing on scalable backend architecture and clear documentation. He established initial student profile scaffolding by creating a placeholder profile file and implementing data structures and hooks to streamline future student-centric features. In a subsequent phase, Gabriel delivered a product catalog management microservice with an availability API, using Express.js and Node.js to provide a GET endpoint for real-time product availability checks against a mock data source. His work emphasized modular microservices, decoupled catalog management, and maintainable code, with all changes documented in Markdown to ensure traceability and support ongoing development.