Persistent ground truth for Claude Code. Stop AI agents from drifting on your codebase.
Latest release v0.33.0 — Cairn v0.33.0 · 29 Jul 2026
2 files for Claude Code, Codex and OpenCode: cairn AGENTS.md, cairn CLAUDE.md — 2,192 tokens loaded in every session.
AGENTS.md A 2,181 tok CLAUDE.md A 11 tok These files are isaacriehm/cairn's own configuration — they tell Claude Code, Codex and OpenCode 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.