Mojang Dev Tools

Unlocks all hidden developer features normally only available inside Mojang's IDE — with an in-game config menu to toggle each flag individually. ALL TOOLS EXIST IN OFFICIALLY RELEASED MOJANG BINARIES, THIS MOD SIMPLY ENABLES THE FLAGS

Sets SharedConstants.IS_RUNNING_IN_IDE = true and MC_DEBUG_HOTKEYS=true at class-load time, enabling debug overlays, internal commands, and dev-mode keybinds that are shipped in the game but never exposed in production.

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Requirements

• Minecraft 26.1.2
• Fabric Loader 0.19.2 or later

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Key Features

Debug Keybinds (F3 held)

Hotkey	Action
F3 + Z	Custom debug renderer menu
F3 + F6	Mojang internal debug options menu
F3 + E	Chunk section path debug overlay
F3 + F	Toggle fog rendering
F3 + L	Toggle smart culling
F3 + O	Frustum culling octree overlay
F3 + U	Freeze/capture frustum at current position
F3 + V	Chunk section visibility overlay
F3 + W	Wireframe rendering mode

Note: F3+F with this mod enabled toggles fog instead of cycling render distance — this is the dev-mode override.

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Renderer Overlays

Toggle any of these in-game via F3 + F6:

• Pathfinding route overlay
• Block neighbor update overlay
• Structure bounding box overlay
• Mob brain & memory overlay
• AI goal selector overlay
• Point of interest (POI) overlay
• Bee hive/path overlay
• Raid state overlay
• Village section overlay
• Entity hitbox overlay (integrated server)
• Block collision shape overlay
• Sculk catalyst spread overlay
• Breeze mob debug overlay
• Experimental redstone wire update order overlay

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World Generation Debug

• Cave carver volume overlay
• Ore vein bounds and type overlay
• Aquifer cell boundary overlay
• Per-chunk feature placement count heatmap
• Large dripstone cluster overlay
• Disable individual world gen passes (fluids, aquifers, surface, carvers, structures, features, ore veins, blending, retrogeneration)

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Gameplay & QOL Flags

• All villager trade tiers unlocked immediately
• Ignore mob cap on integrated server
• Open worlds from incompatible versions
• Allow simulation distance below the normal minimum
• Keep jigsaw blocks after structure generation
• Structure edit mode
• Save structures as SNBT text files
• Per-tick timing monitor
• Show all sound subtitles
• Suppress outbound Mojang telemetry
• Cursor position in F3 overlay
• Suppress all world saves (world reverts on exit)

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Internal Server Commands

Unlocked when IS_RUNNING_IN_IDE is active:

• /raid — Force-start/stop raids, set omen level, spawn raid captains, toggle raider glow
• /debugpath to <x> <y> <z> — Visualize pathfinding routes in-world
• /debugmobspawning at <x> <y> <z> — Diagnose mob spawning per category
• /warden_spawn_tracker — Read/write warden warning levels for nearby players
• /spawn_armor_trims — Spawn all armor trim combinations on armor stands
• /serverpack push/pop — Push/pop server resource packs to clients without restarting
• /chase — Sync camera between two game instances (Mojang QA tool)