You'll make one folder of notes that knows your business. You can read the notes. Your AI can read them too. Answer two questions below, and we'll hand you the right step-by-step guide.
Two apps share that one folder. Obsidian is the one you open to read and write your notes. Your AI helper is the one that reads them and does work for you. No copying, no pasting back and forth — one folder, on your computer, yours forever.
Q1 Which AI do you already use?
Both work the same way — the guides only differ in a few names. Pick the one you would trust with company information, and use a paid plan. On paid business plans, what you type is not used to teach the AI. That part matters.
Q2 Who is this brain for?
Your path
Free. Takes about five minutes. This is the app you'll use to read and write your notes.
obsidian.mdDownload it free and sign in with the Claude account you already pay for. Your guide shows you exactly where Claude Code lives inside it.
claude.ai/downloadFollow it from the top. Every click, and every word to type, is written down. About an hour.
Open Guide 1 →Guide 1 · about an hour. A folder that remembers what you're juggling.
The same Guide 1, for people who use ChatGPT.
Guide 2 · about ninety minutes. A folder that remembers how your business runs.
The same Guide 2, for people who use ChatGPT.
Everything above is just a folder and one helper — on purpose. A folder you understand beats a machine you don't. But one day the folder may feel small: the whole team wants in, or you want answers faster than one helper can read. That's what this door is for.
Tick these only if they're true
A free, open project that takes your folder-of-notes idea and makes it strong enough for a whole team: faster answers, a better memory, and many helpers working at the same time. Your notes come along with you — nothing you built is wasted.
The full walkthrough is the GBrain Field Guide — two tracks: your own brain first (~2 hours), then the company's (+90 minutes). The project itself lives at github.com/garrytan/gbrain.
Open the field guideFair warning: setting this up means typing commands and fixing things when they break. If reading that made your stomach drop, stay with the folder — it will carry you further than you think.
Or have us build it with youThe best helper is already on your computer. Open it the way your guide showed you, copy the box below, paste it in, and press Enter. It will look around and tell you what's wrong:
Something in my brain setup isn't working. Please find the problem before you fix anything: 1. Tell me which folder you are running in, and whether it looks like my brain folder — is there a Brain.md or Company.md? A rules file (AGENTS.md or CLAUDE.md)? An Archive folder? 2. If those files are missing, tell me plainly: "You've started me in the wrong folder" — and show me, step by step, how to start again inside the right one. 3. If the files are there, list anything missing or misnamed. 4. Then ask me what I was trying to do when it broke, and walk me through it — one question at a time, waiting for each answer. Do not change any file until we both understand the problem.
Nine times out of ten, the helper was opened in the wrong folder — so it can't see your notes. Close the black window completely. Open a new one. Type cd and one space. Drag your Brain folder into the window. Press Enter. Then start your helper again.
Still stuck? Or the helper won't open at all? Email us. Tell us which guide and which step you were on, and copy in what the AI said in step 1. A real person reads every message.
hello@andao.ai