Brain OS keeps the thread between you and the AI tools you work with: what you decided, tried, rejected and learned, so your AI picks up where you left off instead of starting over.
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Using Claude Code, Cursor, or Zed? Brain OS is open source and works today. Install it now →
You think fast. You switch context. Your tools don't always come with you. Brain OS keeps the thread running underneath the work, so nothing resets when you or your agent comes back.
New chat
"Where was I with this?" You spend the first ten minutes rebuilding the state you had yesterday, before you can do anything new.
New tool
ChatGPT knew. Claude doesn't. Each AI remembers its own conversations and none of the others', so you explain the same project twice.
A week later
The idea you already rejected comes back as a fresh suggestion, because nothing kept the reason you said no.
You are not supposed to feel the thread. You are only supposed to notice when it snaps.
ChatGPT, Claude and Grok connect with OAuth sign-in, no API keys to paste. Claude Code, Cursor and Zed connect with one install command. Same Brain OS underneath all of them.
Think out loud with your AI. What you decided and why, what you tried, what you are leaving for later. Brain OS keeps the decisions, not the noise. No journaling, no tagging, no second app to maintain.
Next week, next tool, next burst of ideas. Your AI picks up the thread where you left it, and pushes back when something you already rejected comes around again.
You told ChatGPT about your project this morning. Now you open Claude. Watch what happens.
I want to think through the monetization for my app.
Happy to help! Could you tell me a bit about the app you're building and who it's for?
I already explained this to ChatGPT this morning... it's a travel planning tool focused on experience quality, not cost.
I don't have access to your ChatGPT conversations, so I can't see what you shared there. But based on what you just told me, a travel tool focused on experience quality...
✕ The thread snapped. You started over, again. The context was already there, just in a different AI.
I want to think through the monetization for my app.
Since your travel tool prioritizes experience quality over cost and that's the core insight, a few angles worth thinking through:
Premium tier makes sense. Users who care about experience quality will pay to avoid trade-offs. The question is what the free tier looks like without undermining that.
✓ The thread held. Claude picked up exactly where ChatGPT left off. Nothing to re-explain.
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