Cairntir

A stack of stones that sees across time.

Cairntir is a memory-first reasoning layer for Claude Code and every other Model Context Protocol client. It kills cross-chat AI amnesia.

Install

pip install cairntir
cairntir setup

Live on PyPI. Source on GitHub.

Start Here

• Why I built this (blog post) — The story behind the tool
• Cairntir for dummies — Zero-prior-knowledge getting-started guide
• Manifesto — Why Cairntir exists and what problem it solves
• Concept — The three ingredients: verbatim memory, minimal skills, one loop
• Conception — Origin story, the round table, the horizon
• Roadmap — Where we are, where we’re going, and the long horizon
• Integration guide — Embedding Cairntir in your own tool
• Deprecation policy — What “stable” means at v1.0
• Lineage: BrainStormer — What we kept, what we dropped
• Lineage: MemPalace — Concepts borrowed, code reimplemented

Status

✅ v1.0 shipped. Library extraction, protocol seam locked, contract suite, public-API snapshot, every prior schema version migration-tested. Published to PyPI on 2026-05-03. Now on the Road to 2.0.

License

MIT. Free forever. Local-first forever. No SaaS.