Nexo Mod

The Fabric mod half of Nexo Client— a personal Minecraft client project that pairs this mod with a rebranded install/launch app, instead of a monolithic custom launcher. Targets Minecraft 26.3 (Fabric).

Status: alpha.

Features

• LAN-over-internet tunneling — share a singleplayer world with friends over the internet without port forwarding, via a QUIC relay. Uses e4mc's public relay by default; swappable via config. Cross-platform (Linux/Windows/macOS) native codec bundled into the jar.
• Microsoft account sign-in — browser-based OAuth device flow, no separate launcher account juggling. Encrypted (AES-256-GCM) multi-account storage with instant switching, offline-account support, and protection against logging out of whichever account actually launched the game.
• Neon menu re-skin — rounded, glowing black/neon buttons everywhere in the game; animated starfield or Matrix-rain menu backgrounds (configurable, with mouse parallax); a bundled modern font replacing vanilla's pixel font. Fully toggleable back to stock vanilla menus from in-game Nexo Settings.

Requirements

• Minecraft 3
• Fabric Loader 0.19.3+
• Java 25+

Building from source

./gradlew build

The built jar lands in build/libs/. Drop it into your instance's mods/ folder alongside Fabric API.

Third-party code

This mod adapts real, working code from a couple of MIT-licensed open-source projects rather than reimplementing their protocols from scratch — see THIRD-PARTY-NOTICES.md for exactly what was ported from where and full license text:

• vgskye/e4mc-minecraft-architectury — LAN tunnel relay client
• axieum/authme — Microsoft OAuth sign-in flow
• Fix85/SelfNametag — own-nametag visibility technique
• Noto Sans (Google, SIL OFL) — bundled UI font

License

MIT — see LICENSE.