[jen20]

Probably secret option number 3 of no-one having needed it yet - because the tool is standalone, you can render the required output before running whatever needs to consume it. I’ve certainly used it from Python in that manner - bindings are only required if you want to consume the raw language programmatically from a Python context.

[mimischi]

Exactly this. Pkl is most useful as a type-safe configuration language that can output to any other format (already supported, or put together by the user within Pkl). You’ll always get valid JSON, YAML, PLIST, what-have-you as output. This you can then parse in the language/system of your choice.

Certainly language bindings are useful, and if there’s demand likely someone will create them.