ChatDiag
Storytelling in Minecraft has always been a bit clunky. You either spam chat with walls of text or rely on bulky command blocks that fire all at once. ChatDiag changes that by introducing a lightweight, data-driven system for structured, timed messages. Whether you are building an adventure map, running a server event, or crafting a cinematic NPC conversation, this mod gives you precise control over how and when each line appears.
What Makes ChatDiag Stand Out?
At its core, ChatDiag is about timing. Instead of dumping a paragraph into chat, you define dialogs with a words-per-minute (WPM) setting. The mod calculates the delay for each line based on that speed, creating a natural reading rhythm. You can override the delay on individual lines too, which is perfect for dramatic pauses or rapid-fire exchanges.
The dialogs themselves are defined as JSON files under the chatdiag/ directory in your datapack or mod resources. This means you can craft complex scripts without touching a single line of Java. The structure supports prefixes, suffixes, custom sounds, formatting codes, and even custom fonts. You can chain dialogs together or trigger commands at the end of a sequence.
Core Features at a Glance
- WPM Control: Set the base reading speed for your dialog, with per-line overrides.
- Line-by-Line Delivery: Messages appear one at a time, just like a scripted scene.
- Rich Formatting: Use Minecraft formatting codes, custom sounds, and custom fonts.
- Command Execution: Run commands when a line renders or after the entire dialog finishes.
- Dialog Chaining: Link multiple dialogs together for complex branching narratives.
- Data-Driven: All dialogs live in datapacks, making them easy to edit and share.
How to Install and Use ChatDiag
Getting started is straightforward. First, you need to download ChatDiag from a trusted source like Modrinth. The mod is available for recent Minecraft versions, including 1.21.x, and works with the Fabric loader. If you are unsure how to install it, simply drop the JAR file into your mods folder on both the server and client for the best experience. While the mod functions server-side only, having it on the client ensures sound positioning works flawlessly.
For players looking for a hassle-free setup, the foxygame.net launcher offers a one-click install for ChatDiag for Minecraft. This launcher streamlines the entire process, letting you add the mod to your instance without manual file management, and it handles version compatibility checks automatically.
Executing Your First Dialog
Once installed, you use the /chatdiag or /cdiag admin command to start a dialog. The syntax is simple:
/chatdiag [players] id [dialog-id]For example, /chatdiag @s id example:example_dialog plays a dialog for yourself. You can also define a dialog inline using the data argument, which is perfect for quick tests:
/cdiag @a data {"prefix": "<ChatDiag> ", "lines": ["Hello!", "This dialog was not defined in any file."]}Creating Dialogs with Datapacks
Data-driven dialogs are defined as namespaced resources. Your JSON files must reside under data/<namespace>/chatdiag/<file>.json. After adding or editing files, run /reload to load them. A basic dialog definition includes a wpm number, a prefix string, and a list of lines. Each line can be a simple string or an object with custom behaviors like delay, sound, and command.
For example, you can set a sound to play for each line, define a prefix like "next_dialog. The next_command attribute runs a command after the last line's delay, while a line's command attribute executes immediately when that line renders.
Advanced Tips for Mapmakers
When dealing with branching stories, use folder structures in your datapack. For instance, example:entity/mission/success is much cleaner than example:entity_mission_success. This makes it easier to manage multiple quest lines and character arcs. Also, avoid invoking new dialogs in next_command; instead, turn the last line into a DialogLine object with a "delay": 0 to start the next dialog instantly.
For sound positioning, use marker entities or vector coordinates. If a player does not have ChatDiag installed, sounds with unspecified positions will play at their location, similar to /playsound. This is why running the mod on both sides is recommended.
Mod Integration for Developers
ChatDiag is not just for datapacks. It provides a ChatDiag.api() entrypoint for mod developers. You can declare a dependency in your build.gradle using the Modrinth maven repository. The API allows you to chain dialogs and keep a single completable future that resolves only when the entire chain finishes. This is invaluable for quest mods or custom NPC systems that need to wait for dialogue to conclude before proceeding.
Final Thoughts
ChatDiag fills a niche that many mapmakers have struggled with for years. It is lightweight, highly configurable, and integrates seamlessly with existing datapack workflows. The ability to control pacing with WPM and trigger sounds and commands makes it a powerful tool for immersive storytelling. Whether you are a server admin running events or a solo map creator, ChatDiag for Minecraft is worth adding to your toolkit. For those who want to avoid manual setup, remember that the foxygame.net launcher's add-on catalog includes ChatDiag, ensuring you always have the latest version with automatic updates. Give it a try and bring your narratives to life.