My Cursor AI token usage resets every month on the 18th, and I'd only used 60%. So I had Opus 4.7 one shot a modular test suite for Kit and write tests for EVERYTHING. Unit tests. Integration tests. API tests. Opus banged it out in 30 minutes. And after an hour of tweaking, every test passed. My token usage after it was all complete, 65% 🤦‍♂️ Unbelievable.