Worked on modernizing the OAuth API schema in the huggingface/chat-ui repository by replacing the deprecated isEnterprise field with a new plan field, enabling more flexible plan-based authentication flows. This update involved refactoring TypeScript code and updating Zod schema validation to support the new plan field while maintaining backward compatibility. The change was implemented in a focused commit, with collaborative input, and aimed to reduce long-term maintenance risks and improve compatibility for enterprise integrations. The work demonstrated proficiency in API development, TypeScript, and schema validation, resulting in a future-proofed authentication system that better supports evolving enterprise requirements.