The demo is not the product
Every AI product I've seen ship has crossed the same gap: the demo works in week one; the product doesn't work for six more months.
The gap is not "a few edge cases." It's three orders of magnitude of inputs the demo never saw. The fix isn't more model power. It's a discipline:
- Log every output that surprised you, ever.
- Turn each one into a test.
- Don't ship a model change until the test suite passes.
That's the whole thing. There's no shortcut.