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Yggdrasil

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Yggdrasil lets your AI coding assistants remember important project details and decisions across sessions without losing context. It works locally on your computer with no cloud or API keys needed. Compatible with tools like Claude Desktop, Cursor, Codex, and OpenCode, it keeps your coding notes, fixes, and lessons available every time you start a new AI session, saving you from repeating explanations.

Coding
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Use This MCP server To

Recall previous coding decisions automatically Share project notes across AI sessions Avoid re-explaining project details repeatedly Seed memory from existing code transcripts Keep a curated, deduplicated project memory Use the same memory across different AI coding tools Maintain local-only, private AI memory

README

🌳 Yggdrasil

Stop re-explaining your project to every new AI session.
One local memory for Claude Code, Codex, and every MCP agent — shared across sessions, tools, and projects. Zero dependencies. Nothing leaves your machine.

Latest release PyPI Glama quality score Benchmarks AGPL-3.0 alpha

Install · How it works · Numbers · Compare · FAQ

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Yggdrasil — a brand-new session already knows your project, and recalls a fix from another project

Every new chat, your AI forgets. You re-explain the project, the decisions, the gotchas — every time, in every tool. Yggdrasil is a tiny always-on memory that any agent plugs into. Open a new session, in any project, with any AI, and it already knows what you decided, what broke, and what's still open.

$ cd ~/projects/checkout-api && claude        # a brand-new session

🌳 Yggdrasil  (injected automatically at session start)
   • [project_status] payments refactor: idempotency keys added; open: e2e tests
   • [lesson] webhook 401 → signing secret rotated; update env + redeploy

> "have I solved a flaky websocket reconnect anywhere before?"

🌳 recall → found in project `realtime-dash`:
   refresh the token *before* opening the socket, then retry with capped backoff.

No "let me remind you what we did yesterday." It's just there.

Yggdrasil FAQ

Can I use Yggdrasil to remember coding decisions across sessions?
Yes — it keeps your project notes and fixes available every time you start a new AI session in supported apps like Claude Desktop and Cursor.
Does Yggdrasil work with my existing AI coding tools?
Yes — it integrates with Claude Code, Codex, OpenCode, and any app that supports MCP servers.
Do I need an API key or cloud account to use Yggdrasil?
No — it runs locally on your machine with zero dependencies and no cloud connection.
How hard is it to set up Yggdrasil?
It requires developer-level setup, including installing via command line and configuring your AI tools to connect to it.
Can I use Yggdrasil in Claude Desktop?
Yes — you can add it as an extension and share memory across your AI coding sessions.
Will my data leave my computer when using Yggdrasil?
No — all your data stays local and private on your machine.