Worked on the moby/moby repository to enhance the clarity and accuracy of the Swarm Join API documentation. Focused on aligning the Engine API specification with existing validation rules by explicitly documenting required fields such as ListenAddr, RemoteAddrs, and JoinToken. This documentation-driven approach improved API hygiene and governance without altering runtime behavior, ensuring that the documentation accurately reflects current system expectations. Utilized YAML for specification updates and applied skills in API design and technical documentation. The work contributed to better traceability and onboarding for developers, reducing potential misunderstandings during integration and supporting the long-term maintainability of the API.