Close is useful information.
It tells you the shape is probably right. It tells you the idea has survived first contact. It tells you the thing is near enough to become real.
But close is not shipped.
Shipped means someone else can touch it, read it, use it, buy it, share it, or react to it without needing the entire story from me first.
That is the line.
This essay is the shell for that lesson. The full version needs the real story: what was close, what still needed work, and what finally made it shippable.