Comment by ctrlp

there are lots of very robust programs in various languages to learn from. It would be hard to know in isolation but by contrast it is easier to learn what good code looks like. Some code will flow and be easy to read. Other code will be obtuse. Start with simpler projects that don't involve a lot of low-level calls. Work up to more complex implementations. There was never a better time to read code than now with an LLM as a tutor. If you use one of the AI-integrated editors or a code packer you can provide a lot of context to the LLM. Ask the LLM for important modules and work your way through them. Ask it for alternative implementations of a function or translated into a different language. Set up an program in a running environment and walk through using a debugger. Look at the way the code is organized in files and modules. You will inevitably encounter cruft and "bad code". Sometimes there are good reasons for that too. If you prefer books, the Architectures of Open Source Applications (AOSA) books are interesting, but there really isn't a way to avoid pulling down a repo and reading the code. Soon, you'll develop your own taste for what makes sense to you and be able to think independently about the choices the developer made.

It is a bit sad but I think with the advent of LLMs some of the stylistic quirks of programmers past will become a bit anachronistic. Still, they will present opportunities for code archeology.