How does Moshi look up generated type adapters at runtime? Looking through the source I see it tries to create them from factories, but there are no factories(?) for generated adapters. (I'm curious because I'm trying to implement a similar strategy for something else)

It uses a tiny bit of reflection

Aha, I found the

generatedAdapter

method where that happens https://github.com/square/moshi/blob/master/moshi/src/main/java/com/squareup/moshi/internal/Util.kt#L364