100 MOO resources for MUD players
MOO (MUD Object Oriented) systems provide a persistent, programmable environment for virtual world development. This resource guide focuses on the technical infrastructure, core databases, and programming patterns required to deploy and maintain a modern MOO server using the LambdaMOO lineage and its contemporary forks.

Server Software and Modern Implementations
- 1
ToastStunt Server Fork
intermediatehighThe current standard for high-performance MOO servers. It provides 64-bit support, improved networking, and built-in SQLite integration.
- 2
LambdaMOO 1.8.1 Release
beginnerstandardThe classic server source code. While dated, it serves as the baseline for understanding the MOO VM and bytecode execution.
- 3
Stunt Server
intermediatemediumAn intermediate fork that introduced many of the features now found in ToastStunt, useful for legacy compatibility with older databases.
- 4
Dockerized LambdaMOO
intermediatehighContainerized deployment configurations for running MOO servers on modern cloud infrastructure like AWS or DigitalOcean.
- 5
MOO-JSON Support
advancedhighA patch for ToastStunt that allows native parsing and generation of JSON, enabling API integrations with external web services.
- 6
SQLite for MOO
advancedmediumImplementation details for using the ToastStunt SQLite built-in functions to handle large datasets outside the standard object hierarchy.
- 7
WAIF Support
advancedhighLightweight objects that do not consume object numbers. Essential for high-density data structures like inventory items or map tiles.
- 8
TLS/SSL Encryption Patches
intermediatemediumInstructions for implementing secure connections via OpenSSL within the server layer to protect user credentials.
- 9
Binary String Handling
advancedstandardDocumentation on using binary strings to handle non-textual data, necessary for custom protocol implementations.
- 10
Task Scheduling and Preemption
intermediatestandardConfiguration of the server's task limits to prevent infinite loops from crashing the driver during verb execution.
Core Databases and Frameworks
- 1
LambdaCore
beginnerhighThe foundational database containing the absolute minimum objects (#0 through #90) required to boot a functional MOO environment.
- 2
JHCore (Jay's House Core)
intermediatehighA more feature-rich core that includes advanced building tools, a robust mail system, and improved security defaults.
- 3
EnCore (Educational MOO Core)
beginnermediumSpecifically designed for virtual classrooms, featuring web-interface hooks and collaborative editing tools.
- 4
The MOO Programmer's Reference Manual
beginnerhighThe definitive guide to the MOO language syntax, built-in functions, and the standard object hierarchy.
- 5
Object #0 (The System Object)
advancedhighThe root of the MOO hierarchy; understanding its 'do_login_command' and 'do_command' verbs is critical for server security.
- 6
The Generic Room (#3)
beginnerstandardThe parent object for all spatial locations. Learn to extend its 'announce' and 'look_self' verbs for custom environments.
- 7
The Generic Player (#6)
beginnerstandardThe template for all user accounts. Customizing the 'tell' verb is necessary for implementing custom UI or logging.
- 8
Feature Objects (FUP)
intermediatemediumA design pattern for adding commands to players without polluting the inheritance tree, using the 'features' property.
- 9
@dump and Database Portability
intermediatestandardTechniques for exporting specific object trees and verbs into text files for version control or migration between servers.
- 10
Quota Management Systems
intermediatemediumImplementation of the $quota_utils object to restrict the number of objects and bytes a user can create.
Programming and Development Tools
- 1
MCP (MUD Client Protocol)
advancedhighA protocol for structured communication between the MOO and clients like Mudlet, allowing for GUI elements and file transfers.
- 2
Mudlet MOO-Specific Profiles
intermediatehighPre-configured Lua scripts for Mudlet that handle MOO-specific ANSI sequences and local editing prompts.
- 3
Local Editing with @edit
beginnerhighConfiguring the MOO to send verb code to a local text editor (VS Code/Vim) via the client rather than using the in-game editor.
- 4
MOO-Vim Syntax Highlighting
beginnerstandardVim configuration files providing syntax highlighting for the .moo file format and verb code blocks.
- 5
The 'fork' and 'suspend' Keywords
intermediatehighCritical syntax for managing non-blocking operations and background tasks in the MOO's single-threaded environment.
- 6
Verbs vs. Properties
beginnerstandardThe architectural distinction between executable code (verbs) and data storage (properties) and when to use each.
- 7
E_PERM and Permissions Handling
advancedhighUnderstanding the 'caller', 'player', and 'this' variables to prevent unauthorized verb execution and data leaks.
- 8
The $network Utilities
advancedmediumCore objects for handling outbound connections to HTTP servers or other MOOs using 'open_network_connection'.
- 9
Built-in Function (bfun) Overriding
advancedmediumTechniques for wrapping standard functions like 'move()' or 'create()' with custom logic at the database level.
- 10
Tick and Seconds Limits
intermediatestandardMonitoring 'ticks_left()' and 'seconds_left()' to optimize complex algorithms and avoid 'Task ran out of ticks' errors.