Leverage Anthropic Pormpt Caching

[achieveramin]

https://www.anthropic.com/news/prompt-caching

This can dramatically reduce costs and improve Aider.

[the-crypt-keeper]

+1 here, reducing the cost and improving performance of long conversations would greatly enhance the value aider brings, I am currently "/clear"ing aggressively as a workaround I'd love to be able to keep past task context when asking for next task.

[therealtimex]

We're discussing it here https://github.com/paul-gauthier/aider/issues/1086

[paul-gauthier]

This looks like a duplicate of #1086, so I'm going to close it so discussion can happen there. Please let me know if you think it's actually a distinct issue.