One cron to rule them all.
A Mac-only front end for a second brain personal knowledge system, using Claude as the engine.
Hi, from Michael (konigi). Unicron is a second brain (aka personal knowledge management system) made up of plain markdown files. It uses Claude Code skills and requires the Claude CLI install. Claude acts as the inference engine, writing my daily brief, turning transcripts into clean notes, creating links, and keeping you updated on the tasks you should be working on.
Notes in the vault (folder) are all plain text on disk. Nothing is locked-in to a single system or LLM, so you can open them anywhere in any editor. You can keep your vault on a networked location like Dropbox or iCloud Drive so they're available on all your devices.
Unicron opens to Today and writes you a brief from the whole vault: your top priorities, the threads you keep avoiding, what's still open, and what's due. You read three paragraphs instead of digging through folders.
The Library is where you read and edit: people, areas, projects, meetings, and journal. It's the same folder Obsidian would open, so nothing is trapped. Claude keeps the formatting tidy, so you're not fighting markdown to write a note.
Some work doesn't fit in one note. A project keeps that work's meetings, tasks, and loose thinking in one place inside an area, so a months-long thread stays together instead of scattering across the vault.
Tasks hide inside notes you wrote weeks ago. Unicron pulls every open one into a single view and sorts them into yours, what you're waiting on from other people, and threads by area. You get the real list without keeping a separate to-do app in sync.
The graph draws the whole vault as a map of linked notes. It's the fastest way to see what connects to what, and to find the note you only half remember.
Press ⌘N to add a meeting, task, project, journal entry, person, or area. Paste a raw transcript and Claude turns it into a clean note and files it where it belongs. Stray thoughts can go to an inbox from your phone or a hotkey, and Unicron files them later, so the vault stays organized while you keep moving.
The paid Claude plan is a hard requirement, so I'm saying it up front.
Unicron is a native app for M-series Macs.
The app installs it for you on first run.
Pro or Max. Unicron uses your own Claude account, so there’s nothing extra to manage and no second subscription.
Download it and use it. If it earns a spot in your day, you can pay what you want through LemonSqueezy, but you don't have to.
Download for Mac →Apple Silicon · needs the Claude CLI and a paid Claude plan