Second Brain Is the Company OS

Second Brain is shared infrastructure. It gives AI the company’s context, conventions, and workflows so it can work the way we do instead of guessing.

Without it, the model forgets what happened last week, drifts on a Friday, and guesses when it should look something up. With it, the AI has somewhere to go for the answer. It can follow our conventions, use the context we’ve already built, and turn a problem one person solved into something the rest of the company can use.

We named it Second Brain on October 21, 2025. Then Garry Tan and YC started using the same words, people started calling their own stacks Second Brains, and we sat there laughing. Finally, the world is catching up.

The system has four tiers, with the foundation at the bottom because everything else depends on it.

Today, that’s 47 tools on one platform, with 33+ built in-house. It’s the company’s context turned into code that every role can share.

The Charter

I didn’t send a memo and tell everyone to start using AI. We set floors, not ceilings. There’s a contribution floor everyone clears, leaders go first, and the floor rises as the capability of the company rises.

The charter became eight rules:

1. Name the real job first.
2. If your team will not use what you built, that is the failure.
3. Context is the product.
4. Owners decide what ships.
5. Coverage before urgency.
6. Silence for two days lifts only the human yes.
7. Iterate on evidence.
8. Heroics are a warning sign.

Then we put a process behind it. Declare the expectation. Measure maturity from telemetry, not vibes. Immerse each team for three days. Graduate people by gates. No exceptions.

Graduate by Gates

Your level isn’t determined by how good you think you are with AI. It’s determined by whether other people adopt what you build.

You start as a practitioner. Then you become a builder when you’ve authored a skill and two teammates have adopted it. To become a multiplier, you need five skills and ten adopters across three lanes that aren’t your own.

You cannot level up by grading yourself. The evidence is whether what you built became useful to someone else.

Underneath that is another progression. Do the work by hand until it works. Write the skill. Turn the skill into a command. Eventually, build a hook so it fires whether you remember to use it or not.

The system itself isn’t above scrutiny either. Version one of our dashboard ranked a senior leader as Resistant because of an ingestion bug. The thing that grades you is itself graded.

Solve Five of Your Own

If I could give someone starting this one piece of advice, it would be this: solve your own problems before you start building things for everyone else.

When you solve your own problem, it has to actually work. You’re the person dealing with the friction, so you know when the solution is useful and when it only looks good in a demo. That’s how you learn which instructions matter, where the guardrails need to be, and what is worth automating in the first place.

We don’t have an internal roadmap for this. We solve the friction in front of us.

If something used to take an hour every week and now takes five minutes, you just got 55 minutes back. Put those 55 minutes into solving the next problem. Then take the time you save there and do it again.

That’s the compounding.

And if you’re the CEO, don’t ask the company to adopt this if you haven’t done it yourself. I won’t pretend otherwise.

We’re Hiring

We’re hiring a VP of Sales—same bar. Have your AI send what you built in the last 30 days.