- Island values held in `unknown` arm the routed operation set (SCR_DYN_JSVAL): keyed reads and writes, calls and method dispatch, Object statics, and `??` all run in the engine, so a wrapped value answers exactly what Node answers instead of meeting a fence.
- Scalars normalize at the wrap, composites stay engine values by reference, and the round trip preserves identity — a value that crosses into the checked-dynamic tree and back is the same engine value.
- deepStrictEqual over a mixed engine-vs-native pair fails with the reason stated rather than guessing at an answer.
- Corpus 2582–2585 and an npm routed-row fixture pin the behavior; the dyncheck expectations move with it.
- The retired "DOM" nickname is swept out of the sources and corpus in the same pass (29 comment sites) — the world is the checked-dynamic tree, its values are dyn values.
