7 Obsidian + Claude Code Commands for Your AI Second Brain

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Your notes already contain the patterns. You just need something that can read all of them at once. (Credit: GPT Images v2)

Your AI second brain is set up. Here’s what to actually do with it. Number 4 is my favourite.

8 min read

Just now

If you followed the setup from Part 1, then you’ve got an Obsidian vault with Claude Code pointed at it, a CLAUDE.md telling the agent how to behave, and maybe a /context or /weekly command to get started.

Great! You’ve set up the infrastructure.

Now, this article is about what to build on top of it.

Because the setup alone doesn’t do much. A vault with 20 notes and no links is just…a fancy folder. But once you’ve been writing daily notes for a few weeks, linking them with [[wikilinks]], and letting context accumulate, a different category of workflow becomes possible.

These are the ones worth building.

1. Trace how an idea evolved

Picture this: you’ve been writing about something for months. Maybe it’s a technical approach at work, a side project that keeps changing shape, or some recurring frustration. The notes are scattered across dozens of daily logs. You couldn’t reconstruct the timeline yourself without hours of scrolling.