The about page lists API and AI integrations, anomaly detection, CAD. The pattern that burned me on the visit app was not a missing endpoint. It was a missing order.
Someone already ships the happy path
React already saved a visit a certain way. Flutter had to match it. Anomaly detection and CAD were the same class of work: their pipeline, not mine.
200s can still be wrong
Each call succeeded. The object at the end was not the object the other client expected.
The note I keep
Before I parallelize, I write the live sequence. Same habit as not debugging StoreKit before Connect.