Does your AI actually know your business?

I asked Claude to write a follow-up email for a client last month. It came back polished, professional, and completely wrong. Wrong tone, wrong offer, a price I don’t charge.

Not because the tool is bad. Because it knew nothing about me.

That’s the tell. If your AI answers sound like they’d fit any business in your industry, that’s exactly what happened. It’s writing for “a marketing consultant” or “a bakery,” not for yours.

Why every new chat feels like meeting a stranger

A plain chat window has no memory of your last conversation, your services, or how you actually talk to customers. It’s a blank page every time you open it.

So you re-explain. Every. Single. Time. What you sell, who you sell it to, how you’d never write “per our last conversation” because that’s not how you talk.

That’s hours a month spent re-teaching a tool the same 10 facts.

The fix: a business brief you write once

I call it a business brief. One document, maybe half a page, that covers:

1. Who you serve. Not “people who need help.” The actual kind of client, the actual size, the actual problem they come to you with.
2. What you sell and what it costs. Real prices, real packages, real timelines. Vague here means vague in every answer it gives you.
3. Your tone. Three or four words, plus one line of what you’d never say. “Direct, a little dry, never uses the word ‘synergy.’”
4. Your no-gos. Discounts you don’t give. Promises you don’t make. Topics you keep a lawyer near.
5. The questions customers actually ask you. The five things you answer over and over on the phone.

Write it once. Every answer after that gets sharper.

Where to put it so it actually sticks

You have three real options.

1. Claude Projects. You attach the brief as a document, and every chat inside that project can read it. This is the one I’d pick if you use Claude more than once a week. Set it up once, use it forever.
2. Custom instructions. A settings field (both Claude and ChatGPT have one) that gets pasted into the start of every conversation automatically. Good for shorter briefs, since there’s a length limit.
3. A pinned doc you paste in by hand. No setup at all, but you’re copying and pasting it into every new chat. Fine for occasional use. Annoying if you’re in there daily.

Projects win for anyone using AI as a regular part of the week. Custom instructions win if you’re mostly on your phone and want it automatic. The paste-it-in method is the fallback, not the plan.

What a before-and-after actually looks like

Without the brief, I asked Claude: “Write a reply to a customer asking if we do rush jobs.”

It gave me something generic. Professional, sure, but it invented a policy. Said we could turn things around in 24 hours. I’ve never offered that.

With the brief attached (services, my actual rush-job policy, my tone), same prompt:

Write a reply to a customer asking if we do rush jobs.
Keep it in my voice from the brief. Don't invent a policy —
if you're not sure what our rush-job terms are, ask me.

The answer named my real turnaround time, my real upcharge, and it flagged the one detail it wasn’t sure about instead of guessing. That last part matters more than people expect. A brief doesn’t just make AI sound like you. It makes AI stop making things up about you.

What to leave out

You don’t need your business plan. You don’t need your five-year vision or your mission statement.

Skip anything that changes weekly, like current inventory or this month’s promo. That belongs in a separate note you update often, not the core brief. The core brief is the stuff that’s true in January and still true in December.

Keeping it current without it turning into a chore

Set a reminder for the first of every quarter. Ten minutes, four times a year. Did your prices change? Your services? Your tone, even?

That’s it. Most owners over-build this the first time, cramming in everything they can think of. Start lean. Add to it when you notice AI getting something wrong, not before.

The 10-minute setup checklist

1. Open a doc. Write your five sections: who you serve, what you sell, your tone, your no-gos, your common questions.
2. Keep each section to a few lines. If it’s longer than a paragraph, cut it.
3. Open a Claude Project (or your tool’s equivalent), name it after your business, attach the doc.
4. Test it. Ask the same question you’d ask any AI tool, and see if the answer sounds like you.
5. Fix whatever’s off, right in the brief. Don’t fix it in the chat. Fix the source.

Once it’s built, every chat you open inside that project already knows your business. That’s the whole difference between AI that feels like a stranger and AI that feels like it works for you.