Developed feature flags for user access control within the ArrowSphere/nodejs-api-client repository, enabling gated access to Custom Assistant and XCP AI functionalities. This work introduced hasAccessToCustomAssistant and hasAccessToXcpAI boolean fields into the CompleteWhoAmICompany data structure, integrating them with existing enum logic to support granular feature gating. The implementation ensured proper initialization and JSON serialization, maintaining data integrity and compatibility. Release notes and documentation were updated to reflect these changes, supporting traceability and clear communication. The project leveraged TypeScript for type safety, data modeling for structured access control, and Markdown for comprehensive documentation throughout the release process.