Testing

You'll learn why a regression test written in the same agent pass as the fix can't actually verify that fix, and how grading with disjoint context closes the gap.

Our eval score sat flat and green at 94% for three releases while support tickets tripled — the agent hadn't drifted, the test had.

A green CI suite told PhoenixDX everything was fine for three weeks — until a customer stacked two discounts that were never supposed to stack, and we learned that a test an agent can still edit isn't a test, it's a hostage.