How do I get it to spend fable tokens on “curiosity” then switch to cheaper models? Preferably based on its own judgment of what model is truly needed.
Just ask it to. If you want, you can also give it pointers to how to read .claude jsonl/metadata so it keeps track of usage and self-adjusts. It's not perfect, but it's pretty dang good if you just say 'This project is allotted X% of my 5h limit'.