Builder.io Launches Open-Source Composable Skills Framework for AI Coding Agents

Builder.io has released an MIT-licensed, open-source collection of 15+ modular skills designed to extend AI coding agents with new capabilities—from visual planning and code review to autonomous execution and cost optimization. The BuilderIO/skills repository, which reached 3,500+ GitHub stars, provides small, composable tools that agents like Claude Code, GitHub Copilot, and Codex can dynamically load to handle specialized workflows without cluttering the model's context.