1.8.1

1.8.0 emitted a field it did not declare, and the first host to read it found out. A system's uses clauses reach the generated metadata — that is the whole point of them, since a host has to know what to supply — but DriftSystemInfo, the type a host reads that metadata back through, never gained the field. The data shipped; TypeScript denied it existed; a consumer needed a cast to reach what the release was for.

The fix is that there is one description now instead of two. EntityMetadata restated DriftModuleInfo's shapes by hand, and the two agreed only because neither had moved. The compiler's half is written in terms of the runtime's types now, so a field added to one is a compile error in the other until it is populated. uses is optional there, because a module compiled before 1.8.0 has none and a runtime that threw on one would refuse to load a module that works.

Nothing a script can write changed, and no emitted byte moved.