Updated September 2026

Every firm selling AI work says it builds fast. Robby Prochnow chose to show it instead. In April 2026 he built four working apps live in a single day, in front of an audience: a credit intelligence tool, a commercial insurance quoting tool, the site for the challenge itself and the automation workflows behind it. He left the repositories public, dated April 10, so anyone can check what was built and when.

Three weeks earlier he had tried a different kind of test. He wanted to compare two rapid-development platforms, and instead of doing the comparison himself he handed it to an autonomous agent, which built the same thing on each platform and compared the results. Those repositories are public too.

Both choices come from the same place. A claim about speed or about agents is cheap. A dated, public build is not.

From the record of Robby Prochnow

About this story

WhenMarch to April 2026
Kind of storyOrigin
The workFour apps in one day
Told byCommon Ground, from the record of Robby Prochnow
CreditsCommon Ground
Robby Prochnow, Built the apps and set up the agent evaluation