There are two kinds of company about to exist.

AI-native. And AI-tourist.

AI-native companies treat the model the way they'd treat a senior hire on day one. Onboard it. Brief it. Sit it in every meeting. Feed it every decision, every win, every loss, every reason. Six months in, it doesn't just know the business. It is part of how the business thinks.

AI-tourist companies open a new chat every time, type a prompt, get a generic answer, and wonder why their work keeps looking the same as their competitors'.

I recently published the second essay within the Last Brief Series, this one called The Notebook.

It argued that the most valuable asset in any company has never been the process, the deck templates or the rate card. It's the accumulated commercial memory inside the people.

What the client believes. What the market punishes. What's been tried. What actually moves the business.

Agencies have always had this. They've just kept losing it. Every quarter, when someone resigns.

The technology question isn't whether to build a notebook. It's whether to keep losing the one you already have.

That context is the moat. Not the model. Not the tool. Not the prompt library.

The companies that win the next decade won't be the ones with the best AI. Everyone will have the same AI. They'll be the ones who've built the best notebook for the AI to read.

Most companies are still typing prompts into an empty chat. Generic in, generic out.

Few are building the notebook.

Build a personal one. That's where you learn how it works.

Then build an enterprise one. That's where it changes the company.

The sooner you start, the sooner it compounds. The longer you wait, the wider the gap opens between you and the companies who already did.

Start now.

(Happy to help if anyone needs to know where to start, please do reach out)