Astro Co-Founder Open-Sources Rosie: Syncs Skills Across 10 AI Coding Agents

According to Beating, Matthew Phillips, co-founder of the Astro frontend framework, has open-sourced Rosie, a command-line tool for managing AI agent skill packages. The tool automatically detects locally installed coding agents and syncs skills across 10 platforms including Claude Code, Cursor, Codex, Windsurf, Aider, Zed, Continue, Cline, OpenCode, and GitHub Copilot.

Rosie's core feature is a lockfile mechanism that records installations in .agents/rosie.lock, making it git diff-friendly for version control. Skills can be placed in .gitignore, allowing team members to restore the setup by running rosie install after cloning. The tool supports both auto and pinned version management modes, written in C with support for Homebrew, apt, AUR, and FreeBSD pkg installation.