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"