Developed and delivered the Synqly Schema Extension Registry within the ocsf/ocsf-schema repository, enabling extensibility of the Synqly schema through a new UID-based extension mechanism. The work focused on schema design and comprehensive documentation, using Markdown to ensure clarity and traceability for future contributors. By registering extension UID 989, the developer established a maintainable pattern for onboarding additional schema extensions, supporting future evolution and integration with downstream systems. The approach emphasized repository hygiene and cross-team collaboration, laying a foundation for improved interoperability. This contribution demonstrates depth in schema architecture and a methodical approach to documentation and maintainability within collaborative environments.