A while back I needed a box, specific dimensions, had to fit around something I already owned. Thingiverse and Printables came up empty, so I opened a CAD tool and drew it myself. Took hours, for a box with four walls and a lid, mostly because getting the tolerances right so the lid actually snapped shut ate way more time than the shape itself.
That’s the moment 3d.hauri.dev started. Not one tool, a small set of them, each built with Claude Code over a few evenings, each aimed at a shape I kept needing and never wanted to model by hand again.
A hinged box generator takes dimensions and spits out a whole enclosure as one piece, hinge included, nothing to assemble. A standalone hinge generator sits next to it for boxes that just need something to swing shut, no full enclosure required. A cap generator takes a diameter and gives back a press-fit cap, useful for anything from a pill bottle to a pump fitting nobody sells a lid for. And a print cost calculator, mostly for fun, because I’d never actually sat down and worked out what a print costs in filament and electricity versus what I just assumed it costs.
None of these are hard problems individually. That’s the point. Each one’s too small to justify a proper CAD workflow but annoying enough to redo by hand every time, exactly the size of problem Claude Code is good for: narrow, parametric, otherwise a one-off script I’d write once and lose track of.
It’s four tools I use myself, on a subdomain, built over a few evenings. Not polished, and I’m not pretending it is. The test was never “does this look professional,” it’s “do I open this instead of Thingiverse next time I need a box.” So far, yes.
Four is just where it’s at right now. Every time something annoying comes up that’s a candidate for tool number five, so expect the list to keep growing.