Out of curiosity, how much does it cost to daily drive Claude like this?

I only use opus 4.7 and am on the 100$/mo plan. I usually make sure the context does not grow beyond 30-40% of the 1m tokens. On heavy coding days where I do something pretty similar to this, I would occasionally run into the five hour limit, but that happens like once per week and then it wouldn't take too long to reset. Note that I use caveman, but I'm not sure to what extent that really helps.

about 10-22€/month is the minimum since you need Claude Code, which means you either need the pro subscription (22€) or an API with some credit on it

isn't it $20/month /s