I'm curious about the language "bindings" for reading Pkl from Java, Kotlin, Swift, and Golang. At first I thought these were completely independent implementations of the language, since they read from Pkl source and not some intermediate format.

However, the CLI talks talk about a "pkl server" mode that is used by the bindings. So it looks like there is a single implementation (written in some JVM language?) that is run in a subprocess. I wish there was more documentation about how this works under the covers.

https://pkl-lang.org/main/current/pkl-cli/index.html#install...