Sound off. Still moves.

All work

Marrow

Everything you know, one mention away.

StatusBuilt · 2026Checked 2026-09-28

Sole author

Demo data: every name and number in this figure is fictional.

The problem

Notes, decisions and links end up in ten places, and search only finds the exact words.

What I built

  • A personal second brain: one SQLite core with two doors, MCP for Claude and REST for the web UI.
  • Hybrid recall: keyword search and a local vector model fused with Reciprocal Rank Fusion, so “car insurance” finds “auto coverage renewal”.
  • Answers with quote-anchored citations, and a non-AI fallback for every AI step.

How it stays safe

  • Every answer cites the notes it came from.
  • Every AI step has a non-AI fallback.
  • This page shows a seeded demo brain, not real notes.

Anatomy

  • One SQLite core
  • Topics that keep their place
  • Ask in plain words
  • Found by meaning
  • Quote-anchored citation

Numbers

  • 49commits in four daysFrom the project’s repository
  • 7MCP tools for ClaudeFrom the project’s repository
  • 95unit testsFrom the project’s repository

Stack

  • TypeScript
  • SQLite
  • MCP
  • Claude

Sources

  • From the project’s repositorymarrow README, git log marrow 2026-06-07 to 2026-06-10, marrow tests
  • About this website