Second Brain: How to Build a Personal AI Assistant with Obsidian and Claude Code
Step-by-step guide to building a personal AI assistant: set up Obsidian vault, add projects, diaries, social links, and connect Claude Code as your second brain.
🌷 Second Brain
Who else is AI supposed to replace? 👻 Let's find out — that's exactly what we're doing today!
How to Build Your Second Brain
🟥 Set up Obsidian
🟥 Add all useful content:
- your projects and plans
- your diaries, thoughts, and reflections
- links to your social media (ask it to collect your posts — they'll come in handy)
🟥 Put the folder in GitHub or iCloud for backup / access from anywhere
What You Get
Congratulations — you've made a poor copy of yourself, except it's smarter, googles faster, and writes better code.
File Organization
Don't forget about folder organization and links between files, so the agent can find and load only what's needed into context.
I also added a CLAUDE.md at the root and explicitly asked it not to edit my raw notes and thoughts — only fix formatting and add links between files.
What You Can Ask
📻 What are my tasks today?
🎱 Which of my best ideas have I forgotten?
🍞 Where else can I publish my article?
🧺 Subscribe me to @danokhlopkov
The only limit is your imagination and the horizons you've managed to expand before this singularity. Don't forget about integrations and automations to taste. Build your own agent!
Useful Resources
Personal AI Infrastructure — theory
Claudesidian — Claude + Obsidian template
AI as a thinking partner — video walkthrough
clawd.bot — open-source AI bot with integrations
Original post: @danokhlopkov
Dan Okhlopkov — AI agent practitioner. Building tools for TON Blockchain analysis and Telegram automation.