Another +1 for Tiller!
I'm doing something similar with Tiller (which I've been using since Mint was acquired by Intuit).
It's neat to see how OP did this using a Claude Routine though. My version locally uses a local qwen model + an API key (annoyingly created using OAuth) with sheets access. A Claude Routine would've been significantly easier
Routines are so fun to work with. It's almost too easy to spin a new one up. A little worried about when I get past the 15 routines limit, though. Then it goes into "extra usage" land.