Build a second brain with Obsidian and Claude Code
We built a second brain in 45 minutes over a weekend. It is the missing piece for most AI users today.
You probably use ChatGPT or Claude without capitalising on it. There is nowhere for your knowledge to accumulate. You share a file, you ask a question, the AI searches and answers. You ask the next question and it starts over from scratch. Nothing sticks.
A second brain works differently. The AI does not read your documents on demand, it builds a wiki and keeps it up to date. You add a call report. It extracts what matters, updates the client record, the contact record, the record of the method mentioned, and flags any inconsistency.
The real payoff comes at company scale. A company's knowledge lives in Slack threads, email chains, Drive folders, CRM notes and people's heads. Everyone keeps rediscovering what the company already knows.
Inside