What is a second brain? A guide for the AI age
A second brain is a place outside your head where you store everything worth keeping. Here's what it is, why it matters, and why AI changes what it needs to do.
Posts tagged Second brain
What to save in your AI knowledge base: 5 recipes
Five small workflows that turn Hjarni into memory for Claude and ChatGPT. Customer context, meeting notes, decision logs, a style guide your AI follows, and inbox leads handled while you sleep.
LLM wiki vs. plain Markdown: when Karpathy's gist stops working
A plain Markdown file works for the LLM wiki pattern. Until it doesn't. Here are the five points where it stops working, and what to use instead.
What is a Second Brain? The AI-Native Take (2026)
A second brain is an external system for what you read, think, and decide. The traditional version is a graveyard. Here's what replaces it in 2026.
My Marketing Team Is Two AIs and a Knowledge Base
I run Hjarni's entire growth program from inside Hjarni itself. Two AIs, three folders, and a built-in MCP server. Here's the real loop, step by step.
Karpathy's LLM Wiki is right. I just didn't want to run it locally.
Andrej Karpathy's LLM wiki gist nails it. Stop dumping documents at LLMs. Build a brain. Hjarni hosts the pattern over MCP, on every device and LLM.
Never Lose Your Startup's Knowledge
Learn how startups avoid information loss by using Hjarni's shared knowledge base.
Write once. You both remember.
Free to start. No credit card required.
Give your AI a memoryWorks with Claude and ChatGPT today. Gemini coming soon.