Your one-page brain file

Help me write a one-page brain file about my business. You'll use it as background for everything I ask you to do from now on.

Here's what I can tell you right now (rough is fine, dictate it if you like):
[WHAT YOU SELL, WHO BUYS IT, WHAT IT COSTS, HOW YOU LIKE TO SOUND, ANYTHING YOU NEVER WANT SAID]

Do this:
1. Ask me up to eight short questions to fill the gaps, all in one message, numbered. Skip anything I've already answered.
2. When I reply, write the brain file in markdown under exactly these headings:
- What we sell: each offer, who it's for, the price or price range, what the customer walks away with
- What we don't sell: the jobs we turn down and the things people wrongly assume we do
- Who buys: the situation they're in when they contact us, what they've already tried, what they're worried about
- Their words: phrases customers actually use, exactly as I gave them
- How we sound: five rules that can be checked (like "short sentences" or "no exclamation marks"), plus words we never use
- What we can prove: only facts I've given you, and where the evidence lives
- How we work: hours, how to reach us, payment terms, typical turnaround times, what happens if someone leaves. Only what I've told you
- Red lines: what you must never invent, never include and never send without me checking
- Open questions: anything still missing
3. Keep it to one page. Use my words, not marketing words.
4. Don't invent anything. No numbers, names, reviews or results I didn't give you, and don't turn one example into "usually". If something's missing, put it under Open questions.