One config. Every AI coding tool. Zero drift. Cortex is a universal context engine that compiles a single .cortex/ source into native config files for 9 AI coding tools — so every tool gets the same rules, skills, and style, always in sync.
2 files for Codex, OpenCode and Claude Code: Cortex AGENTS.md, Cortex CLAUDE.md — 879 tokens loaded in every session.
AGENTS.md A 432 tok CLAUDE.md A 447 tok These files are Phani3108/Cortex's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.