So, the reason it took so long is I was trying to find a way to strip signatures while still preserving all the contents that other mods would need, like UUID forwarding and server-sent timestamps, but the truth is, I could not find an easy way that didn't involve intense cryptography, so it resolved to sending the client a server message packet. Note that this doesn't change how the server itself sees messages, just how the client receives them.
I had to remove the UUID forwarding feature for 1.19.3 ONLY due to the above reason
Also... I know that the unverified message feature isn't working in 1.19.3. I don't exactly know why, but I'm trying to search for a fix for it that keeps everything simple
Make sure to grab the correct JAR for your server version! JARs are currently not cross-compatible. Any server before 1.19 is not supported by this plugin
And in reality, it would be ineffective to any messages before 1.19 since they aren't signed