Also, Anthropic Projects is HUGE.

You get to create a set of default instructions that all project prompts to adhere to, like: Use Linq whenever possible. Consider Fluent capabilities when it will improve developer experience.

Then you can add all of your existing code (though as has been pointed out, connecting to a repo would be ideal).

And then you can have multiple conversations within that project, so you can separate your lines of thinking.

Alas, the same problems exist. Sonnet 3.5 is faster and a bit smarter, but it still cannot follow a longer conversation.

This is the problem that LLMs have not yet solved.