Developed a permissions-based configuration system for agent creation in the sst/opencode repository, replacing the previous tool-based approach to enhance security and governance. Leveraging Node.js and TypeScript, the new system enables per-action permissions with a default-deny policy, ensuring that only explicitly granted actions are permitted. This architectural change improves configurability and auditability by centralizing permission management and reducing the risk of unauthorized actions. The developer also addressed a longstanding issue in the agent creation flow, ensuring reliable generation of the permissions field. Collaborative development practices were demonstrated through co-authored commits, reflecting a focus on code quality and maintainability throughout the project.