One AGENTS.md for Every Coding Agent: Auto-Derive CLAUDE.md, GEMINI.md & Copilot Instructions (opens in new tab)

Part 1 of a 2-part series. This post covers the whole tool and the "one source of truth" problem. Part 2 goes deep on the most novel piece — letting your npm packages ship agent skills. (dev.to shows the series navigation once Part 2 is published.) TL;DR Write project instructions once in AGENTS.md → agent-kit derives CLAUDE.md, .gemini/GEMINI.md, .github/copilot-instructions.md, and CONVENTIONS.md. No more drift. It mirrors skills from your installed packages and your project into every agen...