M0-Dev Tools

M0-Dev Tools is a client-side Fabric toolbox for Minecraft modders, builders, and technical players. It bundles overlays, HUDs, movement helpers, macros, scripting, and debugging tools into one mod.

Certain modules such as X-Ray, Freecam will require the mod to be installed on the server as well.

It was meant to be a personal project, but I decided to release it for public.

Feature overview

Visual overlays & inspectors

Light level overlay - Shows light levels on blocks to help with mob spawning prevention
Redstone power overlay - Visualizes redstone power levels and updates
Redstone dust update order / BUD overlay - Shows the order of redstone dust updates and BUD mechanics
Slime chunk overlay - Highlights slime chunks for easy location identification
Biome border overlay - Displays biome boundaries
Chunk border overlay - Shows chunk borders for navigation and building
Structure bounding box overlay - Visualizes structure bounding boxes
Command block overlay - Shows command block information and commands
Block inspector / WAILA-style block text - Displays detailed block information on hover
NBT info HUD - Shows NBT data as an on-screen overlay/HUD
NBT tooltips - Displays NBT information in item tooltips
Shulker preview tooltips - Preview shulker contents on hover
Entity radar / entity list - Shows nearby entities with distance and information
Entity health bars - Displays health bars above entities
Item pickup notifier - Announces when items are picked up
Mob drops tracker - Tracks and displays mob drops with statistics (kills, items per minute, unique items)
Mob AI visualizer - Shows mob AI goals and behaviors currently active
ClickHUD - Interactive HUD for quick access to modules

Building, movement & utility tools

Xray - Shows specified blocks through walls and terrain
Instant break - Breaks blocks instantly without mining animation
Fast block placement - Places blocks at maximum speed
Reach - Extends player reach distance for blocks and entities
Inventory move - Allows moving items in inventory while holding items
Mouse Tweaks support - Integration with Mouse Tweaks mod for enhanced mouse controls
Bridging tweaks - Assists with bridge building (snapping, torch placement, slab assist, replaceable targets)
Fullbright - Illuminates dark areas for better visibility
Held light - Provides light from held items
Zoom - Zooms in for better precision and long-distance viewing
Freecam - Move camera independently of player body
Quick teleport - Quick teleportation to waypoints and locations
Waypoints - Place and manage waypoints for navigation
Hunger tweaks - Modifies hunger-related behavior (saturation preservation, no-sprint on low hunger, etc.)
Dynamic FPS - Adjusts frame rate based on window focus for performance
HUD tweaks - Customize HUD elements visibility and appearance
WorldEdit - Basic WorldEdit integration with /draw companion command

Chat & workflow helpers

Secondary chat - Advanced chat system with:
- Addon/replacement render modes for vanilla chat
- Draggable multi-window custom chat
- Tab organization with per-tab regex routing
- Unread message indicators
- Timestamps
- Compact repeated message display
- Message selection and interaction features
- Customizable window management
Command history - Browse and execute previously used commands
Message history - Access and search message history
Longer chat history - Extended chat message retention
Better command block UI - Enhanced command block editor interface
UI utilities - Advanced screen utilities:
- Packet send/delay functionality
- Save/restore GUI state
- De-sync screens
- Close windows without sending packets
- Copy GUI title JSON
- In-GUI command/message input field

Macros, scripting & automation

Macro manager - Create and manage macros with keybind workflows
Macro workbench canvas - Visual editor for macro creation
Macro workbench keyboard layout - Configure keyboard layouts for macro execution
Macro placeholders - Use dynamic placeholders in macros with provider extension points
Script execution - Support for multiple scripting languages:
- Groovy (.groovy)
- Kotlin (.kts)
- JavaScript (.js)
In-game script editor - Edit and test scripts directly in-game
Rule-based automation engine - Advanced automation with /automation command for:
- Event-based triggers
- Conditional actions
- Module toggling
Action runner - Execute queued client actions:
- Item use, offhand use, left click
- Sneak, jump, drop
- Command execution
- Offhand swapping
- Hotbar slot selection
- Customizable delays between actions

Debugging & admin tools

/draw shape/debug rendering - Draw custom shapes for debugging:
- Lines, boxes, circles, cylinders, spheres
- Selection outlines
- Saved shapes with persistence
- Shape management (list, remove, clear)
- Save/load shape collections
- Interactive shape UI
/getdata block/entity inspector - Inspect and edit:
- Block NBT data and properties
- Entity NBT data and attributes
- Item components and data
- Real-time data editing
- Data browser interface
/itemdata item component inspector - Advanced item component inspection and editing with:
- Component metadata and descriptions
- Type hints and validators
- Component examples and templates
- Visual component editor
Watson/CoreProtect tracker - Visualize CoreProtect data with:
- Watson-style visualization
- Tracer rendering
- Vector visualization
- TTL controls for data fade
- Synthetic test data for testing
- Teleport helpers for investigating edits
- Entry search and filtering

Tweaks module

Customizable behavior modifications:

Particle tweaks - Hide own effect particles
Rendering tweaks - Hide offhand item, disable block breaking particles, hide entity rendering
Environmental tweaks - Disable Nether fog, disable rain effects
Audio tweaks - Disable sounds
Movement tweaks - Disable wall-unsprint behavior, angel block placement
Permanent toggles - Permanent sneak and sprint
Camera tweaks - Disable hurt camera shake, disable view bobbing
Performance tweaks - Disable render distance fog

Block & Building utilities

Block scanner - Scan for specific blocks with customizable search patterns
Convenience commands - Utility commands for common tasks
Math evaluator - Execute mathematical expressions with /math command

Scripting

Open the scripting module with , (default) keybind.

Groovy: give yourself a diamond sword

import net.minecraft.item.Items
import net.minecraft.item.ItemStack

player.giveItemStack(new ItemStack(Items.DIAMOND_SWORD))

"Gave you a diamond sword!"

Kotlin: spawn particles around the player

import net.minecraft.particle.ParticleTypes
import kotlin.math.cos
import kotlin.math.sin

val particleManager = client.particleManager

for (i in 0 until 20) {
    val angle = Math.toRadians(i * (360.0 / 20))
    val x = player.x + cos(angle) * 1.5
    val y = player.y + 1.0
    val z = player.z + sin(angle) * 1.5

    particleManager.addParticle(
        ParticleTypes.HAPPY_VILLAGER,
        x, y, z,
        0.0, 0.1, 0.0
    )
}

"Spawned"

M0-Dev-Tools