Contributed to the zed-industries/claude-code-acp repository by delivering two high-impact features focused on permission management and agent customization. Developed a standardized approach to write and edit permission checks using TypeScript and Node.js, which reduced code redundancy and improved reliability for client integrations. Implemented functionality allowing users to append or override the system prompt, enabling tailored agent responses for notes workflows. Ensured both features were robust through explicit tests, clear documentation, and collaborative development practices. The work emphasized maintainability and business value, supporting developer productivity and reducing onboarding risks for new users in a full stack development environment.