SYS://MNEMA
MMNEMA/OS./install
BUILD/26.04// a non-fiction operating system for thought

Your second
brain runs
on disk.

Mnema is a notes engine — local-first, plain-text, indexed at the speed of typing. No cloud lock-in. No magic. Just a relentless system for capturing what you know and finding it when it matters.

$ mnema --new$ man mnema

§02 / topology

A graph, not a folder.

  [stoicism] ────── [seneca, letters] ──── [meditations, m.aurelius]
       │                    │                        │
       │                    └─── [practice: morning] ──┐
       │                                                │
  [memento mori] ──────┐                          [habits/27]
                       │
                  [death + work] ─── [oliver burkeman, 4000 weeks]
                       │
                  [time scarcity] ─── [calendar/2026-q2]
                       │
                       └────── [ideas/long compounding]

:: link

Auto-discovers references between notes as you write. Backlinks update in place.

:: graph

Render any subset of your archive as an explorable topology. Pin clusters to keep them.

:: ask

Query the entire archive in natural language. Citations point back to source notes.

§03 / specifications

Every gesture is a command.

keyactionnotes
⌘ Nnew note// creates an untitled fragment
⌘ Kopen palette// search, jump, run command
⌘ ⇧ Ggraph view// render the active cluster
⌘ /ask the archive// natural-language query
⌘ Eexport// markdown, on disk, anywhere
⌘ ⇧ Zhistory// every state, every revision

§04 / pricing

One license.
No subscription.

Pay once for the version you have today. Updates for a year. Your notes stay yours, on your machine, regardless.

MNEMA · LICENSE

● in stock

$79

// one-time, lifetime device license

  • macOS, Windows, Linux
  • 1 year of updates included
  • Local-first, fully offline
  • Plaintext export, AGPL core
$ purchase --license