Vanilla command API access

[theskyblockman]

Hello,
This feature would able the whole plugin to access the vanilla command API which is totally user-friendly ! The only problem is that this API is from the Mojang's brigadier package and CraftBukkit. I already have ideas to access this API, or to access it's benefits. I have already tried using mixins, the only problem is that those mixins are supported mainly in Sponge the problem is that I want to keep the layer cross-version keep only Spigot code for flexibility. Another way this could be implemented is editing network packets using a hook that would attach to the commands packets who would be directly made for this layer, the problem here is that it would need me to inspect the full server/client code for commands to be able to perfectly replicate the vanilla commands API across versions, but I still think that this is the way to go. I already talked to some developers who tried to access the Spigot API but them too couldn't do anything regarding this problem. If anyone has proper understanding of this API, do not hesitate to respond to this issue !