Documentation

Explore setup, ranks, moderation, chat, storage and network configuration for Hydrogen 1.2.0.

Installation →

**Requirements:** Paper 26.2, Java 25. Hydrogen does not support Spigot or older Paper releases.

A player's displayed rank is their highest-weight active grant, or `default`. Permissions combine the default rank and **all** active g

Hydrogen supports permanent and timed grants with audit history. Rank hierarchy limits what a user can grant, unless they hold the over

Tags are optional chat cosmetics with an in-game selection menu. Players need `hydrogen.command.tag` to access the menu and `hydrogen.t

Ban, mute, blacklist, kick and warn actions are saved in player history. Bans and blacklists block login; warnings are **informational

Hydrogen formats chat using the active rank and tag, and applies mutes, slow mode and filtering.

Select exactly one backend in `plugins/Hydrogen/config.yml`:

Redis provides optional cross-server **messaging**. Player data stays in MySQL or MongoDB, and syncs between servers via polling even w

Hydrogen writes `config.yml`, `language.yml`, `rules.yml`, and `filter.yml` on the first run.

Command permissions default to operators. Delegate only the privileges each role needs.

Hydrogen provides staff, admin, developer and management channels; freeze, staff alerts and utility commands.

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