Currently the only implementation available is for .Net through the ElectronCgi.DotNet nuget package, but there's no reason for this not to work with other lang

Currently the only implementation available is for .Net through the ElectronCgi.DotNet nuget package, but there's no reason for this not to work with other languages/runtimes (it relies on stdin/stdout that is available in all processes). Did you have a particular language/runtime in mind?