Learn Signed decision receipts: from zero to expert, then sell it

No AI background needed. Five levels, each with something to actually do, at your own pace. Tick items as you go (your ticks stay in this browser).

Evidence, proof and selling tools for Signed decision receipts

Level 1 Beginner: understand it

When a gate decides whether an agent may do something, the decision itself becomes important evidence later: "was this action allowed, and by which rule?". CODEGUARD issues a receipt for every allow, deny or ask, signed with an Ed25519 digital signature.

Anyone can check a receipt: in their browser, or with about 30 lines of Python, using our public key. Edit one byte and the check fails. Approval receipts are single-use.

Think of it like this: A till receipt with a hologram. It says what was decided, when, under which rule, and you can tell instantly if someone altered it.

Read the full plain-English explanation: Signed decision receipts, explained.

• I read the explanation above.
• I can say what it does in one sentence, without notes.

Level 2 User: see it work

Run it live: open the live demo. Before each result, guess what will happen. These are checks it must pass:

• Genuine receipt verifies: A real receipt from the live gate checks out.
• Receipt with decision flipped to ALLOW on a DENY: The signature covers the decision.
• Receipt for a different command: A receipt is bound to the exact action it decided.
• Receipt with the signature removed: No signature is not a pass.
• Receipt that is not a receipt: Unknown structure is refused.

• I ran the live demo.
• I can explain what one of these checks shows.

Level 3 Verifier: prove it yourself

This is the skill that sets you apart: you don't have to believe us, and neither do your customers.

1. Install Python 3 if you don't have it (python.org/downloads).
2. Download the kit and unzip it.
3. Open a terminal in that folder. On Windows, click the folder's address bar, type cmd and press Enter. On a Mac, right-click the folder and choose New Terminal at Folder.
4. Run python3 verify.py (on Windows, python verify.py). It checks the seal without the internet.
5. Run python3 verify.py --live. It repeats every check from your own computer.
6. Try to cheat it: open transcript.json in a text editor, change one character, save, and run python3 verify.py again. It must now say FAIL. Unzip a fresh copy afterward.

• I ran the kit's check on my own computer.
• I changed a file and saw it fail.

Level 4 Expert: know the edges

An expert knows what a product does not do, and says it first. That is what makes a buyer trust you.

Read its limits page in full: what Signed decision receipts does not do.

You can say

• Every CODEGUARD decision has a signed receipt.
• Anyone can check it with the public key.
• One changed byte fails the check.

Never say

• "Proves what the agent did": it proves the decision.
• "Every CAIN product issues these".
• "Hardware-signed".

Read the questions real buyers send, with honest answers: answers to buyer questions.

Test yourself (click a question to see the answer)

• I got every quiz question right without looking.
• I can name one thing it does not do.
• I explained it to a friend, and they understood it.

Want a formal study path? The CAIN Academy has courses and exams. Finishing this page is your own practice; it is not a qualification or certification.

Level 5 Seller: put it in front of a customer

1. Copy, paste, send: the shortest route, no technical skill needed.
2. Who buys it and where to find them.
3. The sales conversation, then the offer and the close.
4. The rules: read these before your first message.
5. Selling tools with this product's evidence built in: pitch, emails, call script, objection answers, one-pager.

• I read the rules.
• I sent my first personal message.

About money: your share is agreed in writing with FIRME AI CORPORATION before your first message (email vincent@firmeai.com). Nothing here promises income. Most messages get no reply; that is normal.