Describe the deal, set your public price, and write down your sealed number: the least you'll accept if you're selling, the most you'll pay if you're buying. It is never shown to anyone.
The other side gets a private link, reviews the deal, and seals a number of their own. Neither of you sees the other's.
Two independent AI advocates negotiate across the table, one per side, trading price and terms. You get a Deal Memo if they land it, or a private Meet Report if they don't.
The guarantee
The AI cannot accept less than your sealed number. That rule is enforced by code, not by the AI's judgment.
A deterministic guard checks every proposed agreement against your sealed number before it can be accepted. If it would breach your number, it is blocked. Your sealed number never appears in a message, an email, or the final record. Not during the deal, not after it.
For any product or service of real value: a vehicle or piece of equipment, a contract, a service engagement, inventory, a one-off asset. If a real number is on the line, it belongs here.
The advocates trade the things that actually move a deal: delivery, deposits, payment timing, inspection windows, deadlines, and paperwork. Real deal terms, not a haggling widget.
When the advocates land it, you both get a printable terms sheet: price, terms, parties, what's being traded, next steps. Hand it to your office and close it out.
No deal? You get a private readout of how close you were, in coarse bands that cannot be reverse-engineered into the other side's number, plus the one move most likely to close the gap.