Eaglercraft 1.12.2 is a major community-driven update that brings a more modern version of Minecraft to web browsers. While there is no official "solid paper" in an academic sense, the project relies heavily on the Universal Eaglercraft Server which uses Paper 1.12.2 as its core to provide high-performance multiplayer. Key Technical Features of Eaglercraft 1.12.2 PaperMC Integration : Developers use a Paper 1.12.2 fork

It replaces the old achievement system with the more flexible Advancements system and introduces Functions for complex command-line automation.

Eaglercraft Wiki: Detailed documentation on features and updates. 12.2 or learn how to set up an ? Eaglercraft

This version introduces concrete, concrete powder, and glazed terracotta, allowing builders to create much more vibrant, modern designs that were impossible in older Eaglercraft versions. New Survival Mechanics: