What a KOB3 app is

A KOB3 app is a WASI component (.wasm) that runs on a KOB3 host. The host renders your UI on a Screen — a remote display in the household. You do not open a local OS window.

Your app exports lifecycle hooks (start, on_event, pause, resume, stop) and builds a retained UI tree the host displays. See Your first app to walk through the hello template.