model fallback rules that work

[forgemixer]

Posting this in case it saves someone else a little time.

I'm not trying to build a perfect architecture diagram. I just want a sane starting point around MLX and mini PC.

I'm especially interested in mistakes worth avoiding.

[mellowstream]

Appreciate the detail. The pattern around long context has been pretty similar for me. The biggest change for me was simplifying the stack instead of adding one more optimization layer.