Mycelium for Obsidian — many vaults, one AI-operable surface

00 — Strategy

Separate the worlds for yourself. Let the AI work across them for you.

This is the strategic center. Each world stays walled off and understandable — and your AI still operates across all of them, deliberately. Obsidian stays the place you think and write; Mycelium is the local operations layer the AI works through. Your knowledge keeps its boundaries; the AI gets one way in.

Your vaults — each kept separate

Brands

Products

Clients

Clean separation

A platform vault, a client-project vault, a brand vault, an archive, a memory vault, a legal/process vault. You never collapse everything into one enormous vault just so an AI can find it.

For the AI

One operating surface

Cross-vault tools: search every vault at once, find a note from only its title, trace links between vaults, pull ecosystem stats — and optionally search all vaults by meaning.

01 — Together

Useful work, not just access.

The toolset is broad; the benefit is simple. Your AI can find, read, organize, write, query and maintain your own notes across separate vaults — without moving your vault into a hosted knowledge base.

Find

Find anything

By text, by meaning, by tag, by file name, by frontmatter property — in one vault or all of them at once.

Read

Read with context

Whole files, outlines, frontmatter, backlink context — follow link chains across a domain to see why a note matters.

Write

Edit without clumsiness

Create, update, move, rename with wikilinks kept pointing right. Edit one section or one property in place — precise, surgical edits.

Query

Query like a database

Properties, tags and Bases turn tagged notes across domains into typed, filterable tables.

Maintain

Audit & maintain

Health reports, orphans, broken links, stale notes — the quiet entropy, surfaced before it spreads.

Sovereign

Stay local-first

Mycelium runs on your machine; notes stay markdown on disk; embeddings, when used, run on local Ollama. What leaves your machine depends on the AI client you connect.

02 — Shape

One MCP. Many vaults. Two tiers.

Every tool takes an optional vault; cross-vault tools act on all at once. 74 work even when Obsidian is closed; 28 reach inside the running app.

102

tools total
v1.3.0

always available
app closed

use the
Obsidian app

vaults in one
real example

How the two tiers work →

03 — Proof

A real task in a real ecosystem.

The QIAI live test: narrowing a large multi-vault corpus to a cited synthesis. This proves the search-and-structure workflow — measured, not estimated.

122 MB6,201 notes · 16 vaults

↓

15.5 MBmatched “QIAI” — ~12.7%

↓

19 notesactually about it

↓

10 readdeep source reading · 0.16%

↓

20 KBcited synthesis

Read 0.16% of the corpus and produced a fully-cited synthesis in about 12 minutes.

0.16%

of corpus
read deeply

6.8:1

compression
into synthesis

~12.5m

to a finished
written answer

text+fs

tiers used
in this run

Honest note: in this run the semantic tier was unavailable in that runtime, so Mycelium fell back to lexical and context-aware search and finished the task. These numbers prove the search-and-structure workflow; semantic search is measured separately.

Stratum 05 · The connective tissue

A lightweight MCP,
local at its core.

Mycelium runs locally. Your vaults stay as markdown on disk. Semantic embeddings, when enabled, use local Ollama. What leaves your machine depends on the AI client and model you connect to it. Like the mycelial network under a forest, Mycelium connects what you already have — your model routing still depends on the client you choose.

Independence from interdependence. One stratum of a larger organic system — and it stands on its own.

Wicked Evolutions · The Organic System Local-first by design

04 — Open

Tell me what’s missing. Tell me what’s broken.

A few things are designed but not yet shipped — see the full list on Architecture. If you run a real vault, your pull on them is worth more than any roadmap.

Designed · not shipped

Graph orientation

Reading the link graph to tell a hub from a root from a leaf. Today the graph tools are read-only — backlinks, orphans, broken links — they navigate, they don’t rank.