In what world is a production codebase 75k lines. A single project at my last company was 1.4 million lines of code. Every single one of our microservices had more lines of code than that. And just my team was responsible for 50+ microservices. And thirteen tokens per line is hilariously low.
Holding a week of chat in your head is nothing when 90% of it is stuff that is incorrect or discussed and minds changed. This is exactly why my boss keeps saying conflicting things, the LLM doesn’t know what is true or not. It just regurgitates the random thing from context.