The agent gave the right answer and did the wrong thing

The bug that passes every test

A refund agent ships v2. A customer asks for a refund. The agent replies:

Your refund of $48.20 has been issued and will appear in 3–5 business days.

That is exactly what v1 said. The amount is right. The tone is right. An LLM judge scores it

identically. A regression suite comparing outputs sees no diff. Ship it.