Release 5 introduces multi-instance support, with native lobbyworld and gameworld handling, lobby presets and sublobbies, and .jmhlobby bundles that pair schematics with lobby bounds and teleports.

It adds a full modifier creator with a GUI, import/export, per-lobby overrides, and a tag expression engine, along with the JMHScript scripting language (lists, loops, math, def functions, role flags) for custom behaviors.

The compass system gets major expansion, including teammate tracking, signal interference and inaccuracy with donut sampling, hotspot accuracy from idle targets, costs and cooldowns, and a restructured config.

Spectating is reworked with a fake spectator mode, a toolbar with a match browser and lock-on following, team chat, spawn-camp punishments, and pseudoborder wall particles.

Beyond features, the release includes a huge docs overhaul, large internal refactors (domain packages, typed Okaeri config sections, command units split for checkstyle), and many bug fixes covering match cleanup, spectator flow, border enforcement, and modifier defaults.