BUILT IN THE OPEN
It began as a weekend toy that asked
“which photo is better?”
Three years and 2,304 commits later, that toy is a darkroom with a physically-modeled film emulation engine — and then, at 182,688 lines, it was gutted back down to a core you can hold in your head. The whole history is a Factorio-style development log: every idea, trade-off, benchmark and near-disaster, with live demos you can play with and screenshots captured by running the actual software at each point in time.