Vincent Sarago enhanced the CS-SI/stac-fastapi-eodag repository by delivering a robust upgrade to its cross-origin resource sharing (CORS) capabilities. He replaced the existing CORS solution with the official CORSMiddleware, leveraging FastAPI and Python to ensure more reliable handling of cross-origin requests across diverse deployment environments. By unpinning the Starlette dependency, Vincent reduced environment-specific constraints and simplified future upgrades, directly addressing compatibility and maintainability concerns. His work focused on backend development and API reliability, resulting in a more stable integration experience for frontend clients and laying the groundwork for easier dependency management in ongoing and future backend projects.