he latest version of the plugin is only compatible with 1.12, however there are other versions of the plugin that support Spigot versions ranging from 1.8 to 1.12. These versions can be downloaded here.

Herobrine is a non-player character that was created by a fan of Minecraft. Having never actually been a part of the Minecraft game, the story goes that he haunts Minecraft worlds, and Mojang has recognized the story by jokingly putting "Removed Herobrine" in all changelogs for new releases of Minecraft. This plugin for Bukkit and Spigot-based Minecraft servers allows for server administrators to add Herobrine to the game. This plugin is based off of Jakub1221's Bukkit plugin named HerobrineAI. Just as HerobrineAI was, this plugin is released under the MIT license. This plugin is open source, and anyone may contribute to the plugin code. The project source code as well as more information on contributing to the project is available on the Herobrine Git Repository page.