yggdrasil

🌳 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.

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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.

🚀 Install

Two commands, inside Claude Code (the plugin launches via uv):

/plugin marketplace add VonderVuflya/Yggdrasil
/plugin install yggdrasil

The engine lazy-starts on first use and generates its own local token — no API key, no cloud, nothing to configure. Codex and Cursor use the same flow.

All other channels — CLI daemon, Homebrew, npm, Claude Desktop, from source…

Host / tool	Command
uvx (recommended CLI)	uvx --from yggdrasil-memory ygg install
npm / npx	npx yggdrasil-memory install
pipx	pipx install yggdrasil-memory && ygg install
pip	pip install yggdrasil-memory && ygg install
Homebrew (macOS)	brew install VonderVuflya/tap/yggdrasil && ygg install
Claude Desktop (app)	drag the .mcpb from the latest release onto Settings → Extensions, paste your token (ygg token) — the desktop app then shares the same memory as your CLI agents (guide)
from source	uvx --from git+https://github.com/VonderVuflya/yggdrasil.git ygg install

ygg install is a one-time guided setup: it installs an always-on background service, registers the MCP tools with Claude Code and Codex, and — if your hardware allows — recommends optional local models (or pick none to stay zero-config).

There is also a yggdrasil-memory skill for any Claude surface: MCP connects the tools, the skill teaches the agent when to use them. Use both for the best behavior.

Try it with nothing installed and a throwaway DB: uvx --from yggdrasil-memory ygg serve --reset --db /tmp/ygg.sqlite.

Then just work: ask your agent "recall what we decided about this project", tell it "remember this decision" — next session it's already there. Verify the install any time with ygg doctor.

Already have history? Seed memory from your existing Claude Code + Codex transcripts, Obsidian vaults, and CLAUDE.md repos — distilled locally:

ygg seed --dry-run    # see what it would import; drop the flag to distill for real