Ilan developed foundational infrastructure for the OpenAI Codex CLI, focusing on scalable contributor workflows and robust project setup within the zed-industries/codex and openai/codex repositories. He established project configuration, build scripts, and Docker-based CI/CD pipelines using TypeScript, Shell, and Dockerfile, ensuring reproducible builds and streamlined onboarding. Ilan replaced the Developer Certificate of Origin with a Contributor License Agreement, enabling direct CLA signing in pull requests and improving compliance. He also initiated a signature management system to support future verification features. The work demonstrated depth in backend development, configuration management, and documentation, positioning the project for faster iteration and community growth.