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Second Brain

I Taught My Second Brain to Run Itself

2 min read
buildsaiobsidianagentssystems

My second brain knew everything and did nothing. So I gave it three standing jobs that run on a schedule, and now it works on itself while I sleep.

Three small agents orbiting a knowledge core, with a clock.
Three jobs, one vault. Runs whether I show up or not.

A while back I wrote about turning my notes into a second brain, an Obsidian vault where every person, idea and decision is linked and searchable.

It worked. But the vault knew everything and did nothing. It sat there waiting for me to show up, and I'm the kind of person who builds a great system and then stops using it by week three.

So instead of promising myself I'd maintain it, I gave the vault three standing jobs that run on a schedule whether I show up or not.

The gardener

Runs a couple of mornings a week. It files evergreen ideas out of my messy daily notes, fixes broken links, and flags anything that's been rotting in my inbox. Basic janitorial work I was never going to do consistently.

The useful part is that it keeps a ledger. If I undo something it did, that becomes a rule: don't do that again. So it slowly stops making my least favorite decisions.

The brief

Runs Sunday evenings and emails me a short report. The main section looks for a thread I couldn't see myself: two notes I wrote weeks apart that are quietly making the same argument.

The first one it found connected a note about calling and ambition to a note about my career thesis. I'd already answered a question in one note that I claimed was still open in the other. I didn't see it until something read both pages at once. That one got me.

The forge

The third job keeps a bench of ideas worth writing about, like this post. An idea only makes the bench if it passes a test: could someone without my specific experience have written it? If yes, it's out. The internet does not need more generic AI takes with a personal anecdote stapled on.

What I'd tell you

None of these are chatbots I talk to. They're scheduled jobs. That's the trick: I took myself out of the loop.

Everything they produce writes back into the same vault, so it compounds. The gardener keeps it clean, the brief mines it for connections, the forge turns the good ones into posts. You can see it working: the vault renders live on this site as a 3D map at /brain, and the heartbeat at the bottom updates every time one of the jobs runs.

A second brain that knows things is useful. One that acts on what it knows, on a schedule, turned out to be a different thing. I mostly watch it work now.


Author

Joshua Agarwal

Joshua Agarwal

Chemical engineer in energy and infrastructure. Writing about leverage, intelligent systems, and real-world constraints.