This is quite a lot of code to handle in 1 file. The recommendation is actually good in the past(month - feels like 1 year of planning) I've made similar mistakes with tens of projects - having files larger than 500-600 lines of code - Claude was removing some of the code and I didn't have coverage on some of them and the end result was missing functionality.

Good thing that we can use .cursorrules so this is something that partially will improve my experience - until a random company releases the best AI coding model that runs on a Rassbery Pi with 4GB ram(yes this is a spoiler from the future).