Moongate.Core 1.0.0

Moongate v2

<p align="center"> <img src="images/moongate_logo.png" alt="Moongate logo" width="220" /> </p>

<p align="center"> <img src="https://img.shields.io/badge/platform-.NET%2010-blueviolet" alt=".NET 10"> <img src="https://img.shields.io/badge/scripting-Lua-yellow" alt="Lua Scripting"> <img src="https://img.shields.io/badge/license-GPL--3.0-blue" alt="GPL-3.0 License"> </p>

Moongate v2 is a modern Ultima Online server built with .NET 10, deterministic game-loop processing, Lua scripting, and a chunk/sector-based spatial world model.

Looking for Collaborators

I am actively looking for contributors and reviewers.

• Issues: https://github.com/moongate-community/moongate/issues
• Discussions: https://github.com/moongate-community/moongate/discussions
• Discord: https://discord.gg/h9UUyGqd

Release Automation

• GitHub releases are mirrored to Discord via the GitHub Release Assets workflow.
• Configure the repository secret DISCORD_CHANGELOG_WEBHOOK_URL to enable changelog posting.
• Release notes are sourced from CHANGELOG.md and posted to Discord after the GitHub release is created.
• NuGet packages are published by the NuGet Publish workflow.
• Configure the repository secret NUGET_KEY to enable publishing to nuget.org.

Quick Start

Requirements

• .NET SDK 10.0+
• Ultima Online data files (client)

Run Server (local)

git clone https://github.com/moongate-community/moongate.git
cd moongate
dotnet run --project src/Moongate.Server -- --root-directory ~/moongate --uo-directory ~/uo

Run Server (Docker quick start)

git clone https://github.com/moongate-community/moongate.git
cd moongate
docker build -t moongate:local .
docker run --rm -it \
  -p 2593:2593 \
  -p 8088:8088 \
  -v "$HOME/moongate:/app/moongate" \
  -v "$HOME/uo:/app/uo" \
  moongate:local

Server port: 2593
UDP ping port: 12000
HTTP/UI API port: 8088

Default credentials: admin / password
Change them immediately from the server console with .password.

Player portal routes:

• Dev UI: http://localhost:5173/portal/login
• Embedded UI: http://localhost:8088/portal/login
• Authenticated profile: http://localhost:8088/portal/profile

Run UI (dev)

cd ui
npm install
npm run dev

UI default URL: http://localhost:8088/

What Is In Scope Today

• UO TCP server + packet pipeline
• Deterministic single game-loop with separate network inbound/outbound workers
• Source-generated packet/command/listener registration
• Sector/chunk spatial system with lazy warmup and broadcast radius
• Registry-driven snapshot buckets + journal persistence over MemoryPackable runtime entities
• Lua scripting runtime for commands, gumps, item/mobile behavior
• Startup-loaded C# plugins from the runtime plugins/<plugin-id>/ directory
• Classic books rendered from moongate_data/templates/books/*.txt, with support for both read-only content and writable books (0x93 header saves, 0x66 page saves)
• HTTP admin API + OpenAPI for tooling/UI
• Web admin UI (ui/) for item templates and server/admin workflows
• Player portal for authenticated account overview, profile editing, and password change (/portal/login, /portal/profile, /api/portal/me, /api/portal/me/password)

Project Highlights

• Spatial model is sector-first (chunk-style), not pure repeated range scans.
• World generation pipeline uses named generators (IWorldGenerator) and command-triggered runs (example: doors).
• Doors support runtime open/close behavior and network updates.
• Persistence uses MemoryPack with registry-driven snapshot buckets and generic journal entries.
• Mobile domain model was refactored to remove Level and Experience from UOMobileEntity (they are not part of the base UO mobile model).

Screenshots

Web Admin UI

• UI Screen 1: login and initial admin entry point.
• UI Screen 2: authenticated dashboard and main navigation.
• UI Screen 3: item templates search with image previews.

In-Game Features

• Character Creator at Docks: character creation flow and initial spawn area.
• Door Open/Close Fix: the bug is still there (damn doors).
• Orion Lua Brain: scripted NPC behavior example (orion.lua) with speech loop (my cat is always hungry and always looking for food).
• Teleport Gump: Lua-driven teleport UI and location workflow.

Documentation

• Docs home: docs/index.md
• Getting started: docs/articles/getting-started/
• Architecture: docs/articles/architecture/
• Scripting: docs/articles/scripting/
• Persistence: docs/articles/persistence/
• Networking/protocol: docs/articles/networking/
• Operations/stress test: docs/articles/operations/stress-test.md

Published docs: https://moongate-community.github.io/moongate/

Benchmarks and Stress

• Benchmarks project: benchmarks/Moongate.Benchmarks
• Cross-map teleport cold-destination benchmark: TeleportMapChangeBenchmark.HandleCrossMapTeleport_ColdDestination
• Same-map teleport cold-destination benchmark with self refresh: TeleportMapChangeBenchmark.HandleSameMapTeleport_ColdDestination_WithSelfRefresh
  • Dry run on Apple M4 Max / .NET 10:
    • cross-map median 2.850 ms, mean 4.284 ms, first cold outlier 19.939 ms, allocated 1.85 MB
    • same-map median 1.947 ms, mean 2.908 ms, first cold outlier 13.514 ms, allocated 1.22 MB
• Intelligent NPC dialogue scheduling benchmark: NpcDialogueSchedulingBenchmark
  • Dry run on Apple M4 Max / .NET 10:
    • queue listener median 2.729 us, mean 183.0 us, first cold outlier 2.133 ms, allocated 592 B
    • schedule and complete median 1.170 ms, mean 1.258 ms, first cold outlier 2.169 ms, allocated 1552 B
    • reject duplicate in-flight median 1.270 ms, mean 1.073 ms, first cold outlier 2.696 ms, allocated 1288 B
• Black-box socket stress tool: tools/Moongate.Stress
• Guide: docs/articles/operations/stress-test.md
• Packet handler performance guide: docs/articles/networking/packet-handler-performance.md

Acknowledgements

Moongate v2 is inspired by the UO emulator ecosystem.

Special thanks:

• POLServer: https://github.com/polserver/polserver
• ModernUO: https://github.com/modernuo/modernuo

Data imported/adapted from ModernUO distribution is used in selected world datasets (decoration, locations, signs).

Star History

Contributing

Contributions are welcome. Please open an issue/discussion first for non-trivial changes.

• Follow CODE_CONVENTION.md
• Keep tests green
• Keep docs aligned with runtime behavior

License

GPL-3.0. See LICENSE.