@vondervuflya
Basic information
Durable, local-first memory for AI coding agents over MCP — zero-dependency, curated & semantically de-duped, you own the data (SQLite + Markdown). Works with Claude Code, Codex & any MCP host.
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"yggdrasil": {
"command": "uvx",
"args": [
"--from",
"yggdrasil-memory",
"ygg",
"mcp"
],
"env": {
"YGG_ENGINE_URL": "http://127.0.0.1:42069",
"YGG_ENGINE_TOKEN": "YOUR_TOKEN"
}
}
}
}Tool list not available yet
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Yggdrasil is a local, persistent memory layer for AI coding agents like Claude Code, Codex, and any MCP-compatible tool. It stores project context, decisions, and gotchas across sessions and projects, eliminating the need to re-explain your work every time a new chat starts. The system runs as a tiny always-on daemon (~21 MB RAM) with zero dependencies and keeps everything on your machine.
Install inside Claude Code with two commands (/plugin marketplace add VonderVuflya/Yggdrasil then /plugin install yggdrasil) or via CLI using uvx --from yggdrasil-memory ygg install, npx yggdrasil-memory install, pipx, pip, Homebrew (brew install VonderVuflya/tap/yggdrasil), or a .mcpb file for Claude Desktop. Once running, agents interact with it through MCP tools: ygg_health, ygg_bootstrap, ygg_search, ygg_recall, ygg_remember, and ygg_materialize. Hooks automatically inject a project status summary (~300 tokens) at the start of each session.
It uses SQLite with FTS5 indexing; no external database is needed. Optionally, local embeddings via Ollama improve recall@1 from 0.77 to 0.93 (recall@3 reaches 1.00). Each memory is also a plain Markdown file accessible in any Markdown editor.
Zero dependencies out of the box. The tool runs on SQLite + FTS5 bundled with the daemon. If you want enhanced recall, you can optionally connect to a local Ollama instance for embeddings.
All data stays completely on your machine. There is no cloud component, no account, and no telemetry. The daemon writes to a local SQLite database.
It provides `ygg_health`, `ygg_bootstrap`, `ygg_search`, `ygg_recall`, `ygg_remember`, and `ygg_materialize`. Hooks automatically inject a context summary on session start.
Yes, it is released under the AGPL-3.0 license. Source and full documentation are at https://github.com/VonderVuflya/yggdrasil.
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