
How to build cross-AI assistant plugins for Claude, Copilot, Codex, and Gemini
Right now, there are many AI assistants available for coding. Claude Code, GitHub Copilot CLI, Codex CLI, and Gemini CLI are some of the most widely used options for terminal-based workflows. While it is difficult to determine feature parity, and probably not helpful, there are many common features supported by these assistants such as: custom agents, skills, MCP, hooks, and slash commands. In this post, I’ll explore sharing these capabilities across multiple assistants. ...



