I did exactly that. 15 mins for initial implementation was about right. And it seemed fine at first glance.

Then I decided to run the Ceph S3 test suite against it. So many issues. Think it passed 3 tests on first run out of I think about a hundred. Took another couple of hours to get it to a state that is even vaguely passable for non production use.

Got something vaguely workable but even after many hours I can’t say I super trust it

> implementation can't be that complicated.

S3 has a fair bit of bloat in spec that nobody seems to use and it’s not clearly delineated which is core and what’s ahem optional. I ended up relying on the LLM to figure out what’s core and that ended up missing stuff too so that needed a couple of feature iterations too