GamesAI for Fabric

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Welcome to GamesAI for Fabric! This mod brings AI assistants into Minecraft — ask questions, manage data, and configure AI backends right from the game.

Due to the author's limited energy, we will not support versions below 1.21 or non-Fabric loaders.

Table of Contents (click to expand)

GamesAI for Fabric

Installation

Prerequisites

Minecraft 1.21+ (or Fabric-compatible version — see Version Compatibility)
Fabric Loader ≥ 0.16.10
Fabric API (latest for your MC version)
Java 21 or newer

Steps

Download the latest .jar from Modrinth
Place it in your .minecraft/mods/ folder
Launch the game with Fabric Loader
A default config file is generated at config/games_ai/config.json on first run
Edit the config with your API credentials, then reload with /gamesai reload

Alternatively, download the .jar from GitHub Releases and place it in your .minecraft/mods/ folder the same way.

Usage

Ask Commands

Command	Description
`/ask <content>`	Ask AI using the default model
`/ask -m <model> <content>`	Ask AI using a specific model profile
`/ask -n <content>`	Ask AI without conversation history
`/ask -n -m <model> <content>`	Specific model, no history

Only short flags (-m, -n) are supported. Long forms (--model, --no-history) are not available to avoid duplication in Minecraft's built-in command suggestions.

Management Commands

General

Command	Permission	Description
`/gamesai help`	Everyone	Show context-sensitive help
`/gamesai reload`	Owner (Lv4)	Reload config, tools, and translations

History

Command	Permission	Description
`/gamesai history clear`	Everyone	Clear your own conversation history
`/gamesai history clearall`	Owner (Lv4)	Clear all players' history

Config

Command	Permission	Description
`/gamesai config lang <lang>`	Owner (Lv4)	Set server language (en_us / zh_cn)
`/gamesai config defaultAi <aiID>`	Owner (Lv4)	Set default AI model
`/gamesai config maxHistory <value>`	Owner (Lv4)	Set max conversation rounds (≥ 1)

Data

Command	Permission	Description
`/gamesai data write <key> <value>`	Owner (Lv4)	Write data to database (overwrite)
`/gamesai data add <key> <value>`	Owner (Lv4)	Append data to database
`/gamesai data del <key>`	Owner (Lv4)	Delete an entry from database
`/gamesai data read <key>`	Owner (Lv4)	Read value by key
`/gamesai data list`	Owner (Lv4)	List all key-value pairs
`/gamesai data list keys`	Owner (Lv4)	List all keys

Client Commands

Command	Description
`/c-ask <content>`	Ask AI from the client side (no server command permission needed)
`/c-ask -m <model> <content>`	Client-side ask with specific model
`/c-ask -n <content>`	Client-side ask without history
`/c-ask -n -m <model> <content>`	Client-side ask, specific model, no history

In-Game Config Screen

Press F6 (default) to open the visual configuration screen

General Settings — Edit prefix, max_history, lang, default_ai with sliders, text fields, and cycle buttons
AI Profiles — Add, edit, or delete AI backend configurations with a visual editor
Changes are saved to config.json and applied immediately

To rebind the config screen key: Options → Controls → Key Binds → Miscellaneous → Open GamesAI Config

Configuration

On first run, a default config is created at:

.minecraft/config/games_ai/config.json

Default Structure

{
  "prefix": "[GamesAI]",
  "max_history": 10,
  "lang": "en_us",
  "all_ai": {
    "example_ai": {
      "prompt": "You are a helpful assistant in Minecraft.",
      "ai_name": "[GamesAI]",
      "base_url": "<Your Base URL>",
      "ai_model": "<Your AI Model>",
      "api_key": "<Your API Key>",
      "extra_body": {}
    }
  },
  "default_ai": "example_ai"
}

1. prefix

Property	Value
Type	`String`
Default	`[GamesAI]`

The plugin name used as a prefix in replies. May include Minecraft formatting codes.

2. max_history

Property	Value
Type	`int`
Default	`10`

The maximum number of conversation turns retained per player per model. Set to 0 to disable history. History is stored in memory and cleared on server restart.

3. lang

Property	Value
Type	`String`
Default	`en_us`
Options	`en_us`, `zh_cn`

Server-wide display language. Changes take effect after /gamesai reload.

4. all_ai

Property	Value
Type	`dict`

All AI configuration entries. Each entry is a dictionary (the key is the internal AI_ID):

Field	Description
prompt	System prompt for this AI. Use `> filename.md` to load from `config/games_ai/prompt/`.
ai_name	Display name shown in chat (may include Minecraft formatting codes).
base_url	API endpoint URL (e.g., `https://api.openai.com/v1`).
ai_model	Model name (e.g., `gpt-4o`, `deepseek-chat`).
api_key	API authentication key.
extra_body	Additional parameters passed to the API (e.g., `{"thinking": {"type": "enabled"}}` for DeepSeek). Default: `{}`.

Multi-Profile Example

{
  "all_ai": {
    "gpt4o": {
      "prompt": "You are a Minecraft expert.",
      "ai_name": "[GPT-4o]",
      "base_url": "https://api.openai.com/v1",
      "ai_model": "gpt-4o",
      "api_key": "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "extra_body": {}
    },
    "deepseek": {
      "prompt": "You are a helpful Minecraft assistant.",
      "ai_name": "[DeepSeek]",
      "base_url": "https://api.deepseek.com",
      "ai_model": "deepseek-chat",
      "api_key": "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "extra_body": {}
    },
    "local_llama": {
      "prompt": "You are a friendly Minecraft assistant.",
      "ai_name": "[Llama3]",
      "base_url": "http://localhost:11434/v1",
      "ai_model": "llama3",
      "api_key": "ollama",
      "extra_body": {}
    }
  },
  "default_ai": "gpt4o"
}

For Ollama / local models, set api_key to "ollama" as a placeholder.

5. default_ai

Property	Value
Type	`String`

The model used when a player simply uses /ask. Must be one of the keys in all_ai.

prompt File Reference

Instead of embedding long prompts in config.json, you can reference external files:

Place your prompt file in config/games_ai/prompt/ (e.g., my_prompt.md)
Set "prompt": "> my_prompt.md" in the AI profile

The mod automatically reads the file contents at request time. Any text file format (.md, .txt, etc.) is supported.

Database System

GamesAI includes a SQLite-based public database at config/games_ai/database/database.db.

Command	Description
`/gamesai data write <key> <value>`	Write a key-value pair (overwrites existing)
`/gamesai data add <key> <value>`	Append value to an existing key (auto-creates)
`/gamesai data del <key>`	Delete an entry
`/gamesai data read <key>`	Read a value by key
`/gamesai data list`	List all key-value pairs
`/gamesai data list keys`	List all keys

The AI can also read and write the database through built-in tools (ai_read_data, ai_write_data, ai_add_data, ai_del_data).

AI Tools

The AI can call functions to interact with Minecraft and the database.

Built-in Tools

Tool	Parameters	Description
`get_online_players`	none	Get the current online player list
`get_whitelist_name`	none	Get the server whitelist
`add_to_whitelist`	`player`	Add a player to the whitelist
`remove_from_whitelist`	`player`	Remove a player from the whitelist
`search_minecraft_wiki`	`query`	Search the Minecraft Wiki
`calculator`	`expression`	Evaluate a mathematical expression
`item_calculator`	`expression`, `single_limit`	Calculate item counts with Minecraft units (stacks/shulkers)
`ai_read_data`	`key`	Read a database entry
`ai_read_all_keys`	none	Get all database keys
`ai_read_all_data`	none	Read all database entries
`ai_write_data`	`key`, `value`	Write to database (overwrite)
`ai_add_data`	`key`, `value`	Append to database
`ai_del_data`	`key`	Delete a database entry
`read_skills`	`skills`	Read a skill file
`setting_timer`	`duration`	Wait for N seconds before continuing
`reload_plugin`	none	Execute `/gamesai reload`

Custom Tools via Groovy

You can extend AI capabilities by writing Groovy scripts:

Place .groovy files in config/games_ai/tools/
Annotate methods with @RegisterTool:

import java.util.function.Consumer;
import io.github.pengzixuan30.gamesai.tools.GamesAIToolsRegister;

@GamesAIToolsRegister.RegisterTool(
    name = "my_custom_tool",
    description = "Does something useful",
    parameters = """
        {
          "type": "object",
          "properties": {
            "param": {
              "type": "string",
              "description": "The value to process"
            }
          },
          "required": ["param"]
        }
        """
)
String myCustomTool(Consumer<String> feedback, String aiName, String param) {
    feedback.accept("Executing custom tool...")
    return "Result: ${param} processed"
}

The tool method signature must place Consumer<String> feedback as the first parameter and String aiName as the second, followed by any custom parameters declared in the parameters JSON schema.

Reload with /gamesai reload — tools are discovered and registered automatically.

Skills

Skills are Markdown files that provide the AI with domain-specific knowledge and instructions. The AI can read them via the read_skills tool.

Adding Skills

Place .md files in config/games_ai/skills/
Register them in config/games_ai/skills/skills.json:

[
  {
    "skills": "my_guide.md",
    "summary": "A guide for building redstone machines"
  }
]

Reload with /gamesai reload

Registered skills appear in the AI's system prompt so it knows what knowledge is available.

Hot Reload

GamesAI provides a hot-reload mechanism that lets you apply configuration, tool, skill, and translation changes without restarting the server.

Triggering a Hot Reload

Hot reload can be triggered in the following ways:

Method	Description
`/gamesai reload`	Run by an admin (Lv4) to reload all configuration, tools, skills, and translations.
`/gamesai config lang <lang>`	Applies the language change immediately.
`/gamesai config defaultAi <aiID>`	Applies the default model change immediately.
`/gamesai config maxHistory <value>`	Applies the history length change immediately.
AI tool `reload_plugin`	Called by the AI after modifying tool code or skill files to apply changes immediately.
In-game config screen (F6)	Clicking "Save" writes changes to `config.json` and applies them immediately.

What Happens During a Hot Reload

When a hot reload is performed, the mod executes the following steps in order:

Re-read the configuration file (config/games_ai/config.json) — Applies all changes to prefix, max_history, lang, all_ai, default_ai, etc.
Reload translations — Applies the selected lang (en_us / zh_cn) without restarting.
Reload Skills (config/games_ai/skills/skills.json) — Refreshes the skill index; the available skills list in the AI's system prompt is updated synchronously.
Reload custom tools (config/games_ai/tools/*.groovy) — Hot-loads custom Groovy tool code without restarting the server.

Hot reload does not clear players' chat history. History is stored in memory and is only cleared on server restart.

Project Structure

src/
├── main/java/io/github/pengzixuan30/gamesai/
│   ├── GamesAI.java                  # Mod entry point — init & config loading
│   ├── command/
│   │   └── GamesAICommands.java      # Command registration & execution
│   ├── config/
│   │   ├── GamesAIConfig.java        # Config data model (AI profiles, extra_body)
│   │   └── GamesAIConfigManager.java # Config file read/write (JSON, UTF-8)
│   ├── database/
│   │   └── GamesAIDatabase.java      # SQLite public database
│   ├── help/
│   │   └── GamesAIHelp.java          # Context-sensitive help system
│   ├── openai/
│   │   └── GamesAIRequestAI.java     # OpenAI API client & response handling
│   ├── tools/
│   │   ├── GamesAIToolsRegister.java # Tool annotation scanner
│   │   ├── GamesAIBuiltinTools.java  # Built-in tool implementations
│   │   └── GamesAIExternalToolsLoader.java # Groovy tool loader
│   └── translations/
│       └── GamesAITranslations.java  # I18n translation engine
├── main/resources/
│   ├── fabric.mod.json               # Fabric mod metadata
│   └── assets/games_ai/lang/         # Translation files (en_us, zh_cn)
├── client/java/io/github/pengzixuan30/gamesai/client/
│   ├── GamesAIClient.java            # Client entry — key binding, /c-ask
│   └── screen/
│       ├── GamesAIConfigScreen.java           # Main config screen
│       ├── GeneralConfigEditScreen.java       # General settings editor
│       ├── AiProfileConfigEditScreen.java     # AI profile list editor
│       └── AiProfileDetailConfigEditScreen.java # AI profile detail editor
├── build.gradle
├── gradle.properties
└── settings.gradle

Architecture

flowchart LR
    Config[json] -->|load| Manager[GamesAIConfigManager]
    Manager --> Model[GamesAIConfig]
    Model --> Main[GamesAI]
    Main --> Cmd[GamesAICommands]
    Cmd -->|/ask| API[GamesAIRequestAI]
    API -->|HTTP| OpenAI[OpenAI API]
    Main --> History[(allHistory)]
    History --> API
    API --> History
    API -->|response| Cmd
    Cmd -->|sendMessage| Player[Minecraft Player]
    Main --> DB[(GamesAIDatabase)]
    DB --> API
    Main --> Tools[GamesAIToolsRegister]
    Tools --> API
    GUI[Config Screen] --> Manager

Class	Responsibility
`GamesAI`	Mod lifecycle, config, `allHistory` CRUD, `safeTrimHistory`, debug mode, prompt resolution
`GamesAICommands`	Command tree (`/ask`, `/gamesai`), async dispatch with `CompletableFuture`
`GamesAIConfig`	Data model: `prefix`, `max_history`, `lang`, `all_ai` profiles (with `extra_body`), `default_ai`
`GamesAIConfigManager`	GSON serialization, file I/O to `config/games_ai/config.json` (UTF-8)
`GamesAIDatabase`	SQLite key-value store for public data
`GamesAIHelp`	Context-sensitive help: `/gamesai` → top-level, `/gamesai config` → subcommands only
`GamesAIRequestAI`	OpenAI SDK client, builds messages (`system → history → user`), manages history
`GamesAITranslations`	I18n engine: loads JSON from `assets/games_ai/lang/`, UTF-8, live reload
`GamesAIToolsRegister`	`@RegisterTool` annotation scanner for built-in & Groovy tools
`GamesAIBuiltinTools`	15+ built-in AI functions (wiki, calculator, whitelist, database, skills)
`GamesAIExternalToolsLoader`	Groovy script loader from `config/games_ai/tools/*.groovy`
`GamesAIClient`	Client-side entry: F6 hotkey for config GUI, `/c-ask` command
`Config Screens`	In-game visual config editor with undo/save, sliders, cycle buttons

Building

Prerequisites

JDK 21 (or newer)
Gradle Wrapper (included — use gradlew / gradlew.bat)

Build

git clone https://github.com/PengZixuan30/GamesAI.git
cd GamesAI
./gradlew build

The compiled .jar will be at: build/libs/games_ai-*.jar

Dev Environment

./gradlew runClient    # Launch Minecraft client with the mod
./gradlew runServer    # Launch a local test server

Troubleshooting

`/ask` Returns Errors

Error	Likely Cause	Fix
401	Invalid API key	Check `api_key` in the AI profile
404	Wrong base URL or model name	Verify `base_url` and `ai_model`
429	Rate limited	Wait and retry; reduce request frequency
Timeout	Server unreachable	Check network and `base_url`
Empty reply	Model returned nothing	Check prompt and model compatibility

AI Tools Not Working

Ensure tools are properly registered: check server log for [GamesAIToolsRegister] Registered tool: ...
For custom Groovy tools, check config/games_ai/tools/ for syntax errors
Enable debug mode: /gamesai debug to see full prompts and tool call results

Config Screen Issues

Press F6 to open (check key binding in Controls → Miscellaneous)
Config changes in the GUI are saved only when you click "Save"
Use "Undo" to revert to the last saved state

What's New

Version 0.2.0

🎯 Highlights

🖥️ Client-side config screen — A visual in-game configuration GUI (press F6).
💬 Client command /c-ask — Ask AI from the client without server command permissions.
🗄️ Database, external prompts, skills & custom tools — SQLite public database, > file.md prompt references, a skills system, and Groovy custom tools.
🧹 No-history mode — /ask -n asks AI without conversation history (aligned with the MCDReforged version).
🛠️ AI tool calling — The AI can now call built-in and custom tools to interact with Minecraft and the database.
⚙️ extra_body config — Pass extra provider-specific parameters to the API for more flexibility.

1. Client-side Config Screen

Press F6 (default) to open the visual configuration screen. Edit general settings and AI profiles with sliders, text fields, and cycle buttons — changes are saved to config.json and applied immediately. See In-Game Config Screen.

2. Client Command `/c-ask`

The new client-side /c-ask command lets players ask AI from the client without needing server command permissions. It supports -m (model) and -n (no-history) flags, just like /ask. See Client Commands.

3. Database, External Prompts, Skills, and Custom Tools

Public database — SQLite key-value store accessible by AI tools and commands. See Database System.
External prompt files — Reference external .md files as system prompts via > filename. See prompt File Reference.
Skills — Markdown files that give the AI domain-specific knowledge. See Skills.
Custom tools — Extend AI capabilities with Groovy scripts. See Custom Tools via Groovy.

4. `/ask` No-History Mode

Use /ask -n <content> to ask AI without using conversation history (aligned with the MCDReforged version's !!ask -n). See Ask Commands.

5. AI Tool Calling

The AI can now call built-in tools (Minecraft Wiki search, calculator, whitelist, database, skills, etc.) and custom Groovy tools to perform actions in Minecraft. See AI Tools.

6. `extra_body` Config

Each AI profile now supports an extra_body field for passing extra provider-specific parameters (e.g. DeepSeek's {"thinking": {"type": "enabled"}}). See 4. all_ai.

Version Compatibility

Minecraft	Fabric Loader (min)	Yarn Mappings (min)	Fabric API (min)
26.2	0.18.4	-	0.152.1+26.2
26.1.2	0.18.4	-	0.145.4+26.1.2
26.1.1	0.18.4	-	0.145.2+26.1.1
26.1	0.18.4	-	0.144.0+26.1
1.21.11	0.17.3	1.21.11+build.6	0.139.4+1.21.11
1.21.10	0.17.0	1.21.10+build.3	0.134.1+1.21.10
1.21.9	0.17.0	1.21.9+build.1	0.133.14+1.21.9
1.21.8	0.16.13	1.21.8+build.1	0.129.0+1.21.8
1.21.7	0.16.13	1.21.7+build.8	0.128.1+1.21.7
1.21.6	0.16.13	1.21.6+build.1	0.127.0+1.21.6
1.21.5	0.16.10	1.21.5+build.1	0.119.5+1.21.5
1.21.4	0.16.9	1.21.4+build.8	0.110.5+1.21.4
1.21.3	0.16.7	1.21.3+build.2	0.106.1+1.21.3
1.21.2	0.16.7	1.21.2+build.1	0.106.1+1.21.2
1.21.1	0.15.11	1.21.1+build.3	0.102.0+1.21.1
1.21	0.15.11	1.21+build.9	0.100.1+1.21

Due to the author's limited energy, we will not support versions below 1.21 or non-Fabric loaders.

Acknowledgements & Disclaimer

DA100 — Logo design for this mod
FabricMC — Modding framework
openai/openai-java — Official OpenAI Java library
Minecraft is a trademark of Mojang / Microsoft. This mod is not affiliated with Mojang.

All content generated by AI (LLM) models is unrelated to this mod.

All consequences arising from custom tools are unrelated to this mod.

Sponsorship & Contributors

Sponsorship address: Afdian

Those who sponsor GamesAI will appear in the following sponsor list (currently no sponsors):

#	Sponsor	Amount	Date
-	-	-	-

License

Source code is licensed under the MIT License — see the LICENSE file for details.
Logo and visual assets are proprietary and all rights reserved by 冬天衣服不错. You may view and share them for personal, non‑commercial use, but any modification or commercial use requires prior written permission.

GamesAI

Compatibility

Minecraft: Java Edition

Platforms

Supported environments

Links

Tags

Creators

Details

GamesAI for Fabric

Installation

Prerequisites

Steps

Usage

Ask Commands

Management Commands

General

History

Config

Data

Client Commands

In-Game Config Screen

Configuration

Default Structure

1. prefix

2. max_history

3. lang

4. all_ai

Multi-Profile Example

5. default_ai

prompt File Reference

Database System

AI Tools

Built-in Tools

Custom Tools via Groovy

Skills

Adding Skills

Hot Reload

Triggering a Hot Reload

What Happens During a Hot Reload

Project Structure

Architecture

Building

Prerequisites

Build

Dev Environment

Troubleshooting

/ask Returns Errors

AI Tools Not Working

Config Screen Issues

What's New

Version 0.2.0

🎯 Highlights

1. Client-side Config Screen

2. Client Command /c-ask

3. Database, External Prompts, Skills, and Custom Tools

4. /ask No-History Mode

5. AI Tool Calling

6. extra_body Config

Version Compatibility

Acknowledgements & Disclaimer

Sponsorship & Contributors

License

`/ask` Returns Errors

2. Client Command `/c-ask`

4. `/ask` No-History Mode

6. `extra_body` Config