Greetings.
How likely is it you could add support for SpongeVanilla and SpongeForge?

Hi EmanYm - This is a pet project and I originally built it for me. I don't use the server plugin myself (I use the forge/vanilla client with local dat files) so I'd have to setup a whole sponge environment and learn how to do it... What I'm trying to say is I doubt it, but feel free to send me pull requests.

Fair enough.
Would you be okay if I posted a port request on the sponge forum?

sure - if they want to add sponge support to the existing code that would be my preference, or if they'd rather provide guidance on how I can enable support. I imagine this would just replace the server side part and would send the messages just like the existing forge mod for the server.

FYI I no longer plan to support this mod targeting Minecraft before 1.13, and as such I don't plan to support sponge until it's upgraded to 1.13 version

I've recently released an updated Forge version for 1.12.2 due to overwhelming requests for it, perhaps this will work with SpongeForge?