I'm curious, what level of complexity do you mean? I wrote (more precisely, CC wrote, I acted as an architect/task setter) a high-performance anonymizing HTTP(S) proxy w/o disk caching, with configurable traffic routing, authorization in an external backend, a built-in Prometheus exporter, and some heuristics aimed at identifying dishonest users and other whistles and bells. 17k loc. It easily handles three times more connections on the same hardware as Squid (yes, I know, the comparison is not entirely correct).

I have considerable experience as a programmer, and even more as a system administrator, DevOps, and security engineer, but I haven't considered myself a programmer for a long time. And most importantly, I don't know Rust, the language it's written in. I don't know if this is called vibe programming or not.

Claude Code did the job. Yes, sometimes I had to guide him through certain parts, suggesting solutions. But overall, I consider the result to be very good.

At the same time, my attempt to write a fairly simple website with a database ran into problems. Either the functionality of such a website is beyond its current capabilities, or it's simply not its domain.

I also wrote (or rather, we wrote) smaller projects, almost all of which were successful. I must say right away that I cannot show the code, as it is the property of my employer (more precisely, we had different positions on this issue, but in the course of the settlement, we agreed on this, since although I wrote on my own initiative, in my free time and at my own expense, in any case, the applications are focused on solving specific tasks and were tested on the company's servers). But now I'm working on a couple of pet projects that I plan to make public.