Proof

Every decision,
its cost, and what it did.

The record is your product's whole story, written down as it happens. What changed, why CORA thought it would help, what it cost, and what the numbers did afterwards. It is how a Product Agent shows its work.

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What's on it

Nine things, every single time.

Not a changelog and not a status report. Every entry answers the same nine questions, so two improvements a year apart can be read side by side.

What changed

The change itself, described the way you would describe it to someone who does not work on your product.

Why CORA thought it would help

The reasoning, written down before the result was known — so you can argue with it, and so it can be marked right or wrong later.

What it already knew

The pattern CORA carried in from everything it has built and measured before this product.

What it cost

The price of building and shipping this change, in money, sitting next to the result it bought.

Who approved it

The person who said yes, and the moment they said it.

When it shipped

The date and time it reached real customers, and how much of your traffic saw it first.

What the numbers did

The measurement afterwards, against the one thing the change was meant to move.

Whether it stayed

Kept or reversed. A change that did not earn its place comes back out, and the record says so.

What it taught the next one

The lesson CORA carries forward, so the next improvement starts from this one instead of from nothing.

Improvement · zbstack.xyz · #0001Real · our own site

What we saw: On five pages, the top image was told to load last. On slow connections, visitors saw a blank space first.
Why it happened: A “load later” setting — right further down a page, wrong for the first thing on screen. Copied onto every page built after it.
What we already knew: The largest image on the first screen should never wait. The kind of rule CORA carries from one system to the next.
What we changed: All five images now load immediately.
Who said yes: A person on the team — 22 July 2026.
What happened: The image loads the moment the page does. We didn’t measure it against live traffic, so we won’t quote you a number.
Who found it: A person, during a review. Not CORA.

Every change to this site is recorded this way

#0001 runs short because it is honest: a person found it, not CORA, and we never put it in front of live traffic — so the cost and outcome rows have nothing true to say. The nine above are what a record carries once CORA is running your product.

Why it compounds

A product that remembers is worth more every week.

Most software forgets. The team that built it moves on, the reasoning leaves with them, and the next change starts from scratch — which is why the tenth change to a system costs more than the first.

CORA’s record is the opposite. Every improvement carries its evidence, so the next one starts from everything the last one learned. The longer your product runs, the better the decisions get — and the more it would cost you to start over somewhere else.

Your first month is the least valuable month you will ever have with CORA.

Straight talk

What is real here, and what is illustrative.

Simulated demonstration · illustrative figures · not a customer result

The record above is this website’s own. Demonstrations elsewhere on this site are simulated and use illustrative figures — and they say so on the frame. We do not invent numbers.

Start a record
of your own.