The demo cost $4 in credits and everyone loved it. Then 2,000 people started using it and three things happened in the same week: a $3,100 bill you can't explain, someone posted your full system prompt on X, and one user's 90-second request blocked everyone else's. None of these are model problems. They're the engineering that sits around the model, and none of it existed in the demo. This module installs it: the cost arithmetic, caching that actually pays, routing, rate limi
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