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Yggdrasil

One shared, durable memory for your AI coding agents — local-first, zero-dependency.

Connector by VonderVuflya · GitHub account verified by the MCP Registry

IndexedAGPL-3.0Local (stdio)★ 22
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Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/vondervuflya-yggdrasil

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

One shared, durable memory for your AI coding agents — local-first, zero-dependency.

Use cases: agent-memory, knowledge-base

Reviews

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No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list, install config and code. Checked Oct 25, 2026.

Tools
3 read · 1 write · 0 delete · 2 not yet classified
Secrets
1 (API keys, tokens or passwords)
Install scripts
None found
Runs as
Python package

Tools by what they do 6

Read from the source code; the running server may list different tools.

Read 3 · Look things up without changing anything.

  • ygg_health
  • ygg_recall
  • ygg_search

Write 1 · Create, change, send or run things.

  • ygg_materialize

Not yet classified 2 · We could not tell from the name and description.

  • ygg_bootstrap
  • ygg_remember

Secrets and settings it asks for

Secrets: values you paste in that let it act as you.

  • YGG_ENGINE_TOKEN

Other settings (environment variables or headers).

  • YGG_ENGINE_URL

Network hosts it talks to 11

  • apple.com · found in code
  • astral.sh · found in code
  • docs.astral.sh · found in code
  • files.pythonhosted.org · found in code
  • github.com · found in code
  • glama.ai · found in code
  • lmstudio.ai · found in code
  • ollama.com · found in code
  • opencode.ai · found in code
  • openrouter.ai · found in code
  • pipx.pypa.io · found in code

Files it touches

  • /proc/cpuinfo
  • /proc/meminfo
  • /sys/module/amdgpu
  • /Users/vuflya/Documents/Codex/2026-05-25/obsidian-codex-twitter-obsidian-hermes-agents/yggdrasil-demo/yggdrasil/ygg_mcp_server.py
  • /usr/libexec/ApplicationFirewall/socketfilterfw
  • Your home directory (~)
  • ~/.yggdrasil
  • ~/.yggdrasil/scripts
  • ~/.yggdrasil/token
  • ~/.yggdrasil/update-check.json
  • Any path the agent passes to its tools

Tools (6)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • ygg_bootstrap

    Load the top durable memories for ONE project — decisions, conventions, lessons, and open status — to prime work at the start of a task. Use when you already know the project; for cross-project discovery use ygg_recall, for a targeted in-project query use ygg_search. Results are project-scoped and ranked, most-used and pinned first.

  • ygg_health

    Report the local Yggdrasil memory engine's health: running status, total stored-memory count, and whether semantic (dense-vector) search is available. Call this first when any other ygg_* tool fails unexpectedly, to confirm the engine is up before retrying. Returns a small JSON status object.

  • ygg_materialize

    Write ONE stored memory to a human-readable Markdown note (Obsidian-compatible) on disk; the stored memory itself is unchanged. Use when the user wants to read, edit, or archive a specific memory as a file. Needs the memory id from a prior ygg_recall / ygg_search / ygg_bootstrap result plus its project; returns the written file path.

  • ygg_recall

    Search durable memory ACROSS ALL projects for prior solutions, decisions, and lessons to reuse. Use BEFORE solving any non-trivial problem ("have I handled this before?"); for one known project use ygg_bootstrap to load its context or ygg_search for a targeted query instead. Ranks by relevance and past usage — lexical by default, semantic when embeddings are enabled.

  • ygg_remember

    Persist ONE atomic, reusable fact (a decision, lesson, fix, convention, or status) to a project's durable memory for future sessions. Call right after you decide something, learn a lesson, or fix a non-obvious bug; store one idea per call, phrased to stand alone. Near-duplicates are merged automatically and obvious secrets (API keys, tokens) are refused. Returns the saved memory id.

  • ygg_search

    Search ONE project's durable memory with a free-text query and optional type filter — the precise, in-project lookup. Use when you know the project and want specific matches (e.g. every 'fix' about auth); for cross-project discovery use ygg_recall, to load a project's whole context use ygg_bootstrap. Lexical BM25 plus semantic ranking when embeddings are enabled.

Signals

Stars
22
Forks
2
Open issues
0
Contributors
1
Weekly downloads
166
Last commit
Oct 22, 2026 (7 days ago)
Last release
Oct 22, 2026 (8 days ago)
Last package publish
Oct 22, 2026 (8 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name
io.github.VonderVuflya/yggdrasil
Version
0.16.0
Auth
API key
Packages
pypi yggdrasil-memory
License
AGPL-3.0
Repository
github.com/VonderVuflya/yggdrasil
Website
github.com/VonderVuflya/yggdrasil
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql
Cite this page

Yggdrasil MCP server. Agent Mart. https://agentmart.dev/connectors/vondervuflya-yggdrasil (last updated 2026-10-24)