A reference guide for Prompt / Skills / MCP configuration paths across Claude CLI, GitHub Copilot, OpenAI Codex CLI, and Google Gemini CLI
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This document maps out the configuration paths for four major AI coding assistants, covering:
- Prompt / Instruction files — Global and project-level instruction file locations
- Skills — Paths and formats for reusable custom skills (
SKILL.md) - MCP configuration — Model Context Protocol server config paths and examples
| Tool | Developer |
|---|---|
| Claude CLI | Anthropic |
| GitHub Copilot | GitHub / Microsoft |
| Codex CLI | OpenAI |
| Gemini CLI |
→ ai-tools-config-reference.md
- Some paths are Experimental / unofficial (e.g., Copilot global Skills) — verify against the current version of each tool before use
- All tools are rapidly evolving; cross-reference with official documentation
- Last updated: March 3, 2026
MIT