ff285455d2
The recovered comment claimed a dev server picks the flag up from the environment it was built with. It does not: dev and start both serve from src/, so build.ts's define only reaches the staging bundle the @e2e harness builds. OFF, the default and the reason the gate exists, needs no plumbing; opting IN is what is out of reach, and closing that gap means making the app bootstrap async, which nothing here needs yet.