The offer, the price and the close

Sell KEYSTONE as Fix + Prove: one finding closed, with proof the client's buyer can re-run.

What you sell

What the client receives

• The patch, applied on a branch.
• An independent test that fails on the old code and passes on the new.
• A signed, hash-chained record and a standalone verifier.
• A short note the buyer can forward to their own customer.

What the offer itself says about its limits

• A proof covers the contract and the tests we ran; it is not a proof that the whole system is safe.
• If the independent test cannot run, the verdict is NOT_VERIFIED and nothing is issued.
• We do not claim a fix we did not prove.

Price source: cain_audit/products.py → fix-prove. Prices are the founder's proposed list prices, not validated market rates; any discount needs the founder's OK.

What you need from the client

• The finding to close (the report line or ticket).
• A copy of the affected code, or access to the branch.
• Agreement in writing on what "fixed" means (the acceptance test).

How to close

1. Ask: "Which open finding would you most like to close with proof this month?"
2. Price it: small fixes $500, standard $1,500, complex $2,500 (the founder confirms the size).
3. Agree the acceptance test in writing; that protects both sides.
4. Hand over to the founder for the 50% deposit and the code access.

Copy you can send

First email

Subject: closing [finding] with proof your customer can re-run

Hi [first name],

When a customer asks you to prove a security fix, most teams send a screenshot or a
ticket. We send a sealed record: a rule-based detector found the problem, an independent test fails on
the old code and passes on the new, and your customer can re-check it offline without trusting us.

Fixed price from $500 per finding. Two-minute look at what the proof looks like:
https://cainstudio.online/top25-keystone-record.html

Worth a 15-minute call?

[your name], FIRME AI CORPORATION

LinkedIn connection note (under 300 characters)

Hi [name], I work with teams that need to prove security fixes to their customers, not just claim them. Our fixes come with a sealed record your customer can re-run offline. Happy to show you a 2-minute example.

Follow-up, three days later

Hi [first name], one more thought: if any finding from your last review is still open, we can close it with a
re-runnable proof at a fixed price. Want me to send the example record so your team can try verifying it?

Fill in the brackets by hand for each person. Never paste the same message to a list.

Hand-off to the founder

Email vincent@firmeai.com with: company, person and role, what they said in their own words, which offer, the price you quoted, and the agreed next date. The founder handles scoping, written authorisation to test, invoices and delivery.

Next: the rules, the glossary and the quiz →

FIRME AI CORPORATION · CAIN-42 is a Byzantine trust fabric. Numbers marked "our own check" were run by us, not by an independent party. Nothing on these pages is a certification.