I am still riding the dopamine and adrenaline high from discovering what I'm calling the most powerful second brain system I've ever built — and this week on Million Dollar Grit I'm breaking down the whole thing. If you've been using ChatGPT or Claude to build context and memory for your AI work, you need to hear this. I spent two years building a second brain in ChatGPT and last week I stumbled on a viral article from a developer named Karpathy that sent me down a two-day rabbit hole untangling code speak into something any normal non-technical person can actually build. The result is a private, secure, off-the-cloud second brain that lives on your own device, works with any AI tool that comes along, and gets smarter every single time you use it — without you having to organize a single thing. I walk you through the exact system: what Obsidian is, how the three-folder structure works, what a wiki actually is and why the AI builds it for itself not for you, and why this completely solves the persistent memory and context problem that every AI user is running into. If you want to stop re-explaining yourself to AI, stop losing your best thinking, and stop having your data held hostage by a company you don't fully trust — this episode is for you.