But Claude Code does read the entire file when it reads or writes anything.

Humans don't do anything close to that when the files get big.

So presumably what LLMs need is a finer context granularity than per-file.

The reality is that for any meaningful work automation, the currently available tooling is not meeting that expectation.

And 99% of us do not have the capabilities nor knowledge to build these SOTA models which is why A. we are not at OpenAI making 10M+ TC and B. We are application developers who are using off the shelf technology to build products and services.

As such, we have real world experience with these technologies.

BTW I use AI heavily every day in cursor and whatever else.