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Dumpy
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Provides command based developer tools to dump a runtime .json of almost any parameter you can think of.
Includes quality of life improvements and small tweaks to enhance and customize gameplay.
Neoforge is a fork of the Minecraft Forge available for versions 1.20.1+ of Minecraft. Many Forge mods are compatible with Neoforge and vice versa.
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Description
Dumpy is a developer only mod for dumping resolved, in-game data at runtime.
What it does:
Dumpy answers: “What does the game think is true right now?” after datapacks, configs, and reloads have applied. It’s built for debugging, balancing, validation, and pack development.
Features:
- Rich runtime dump commands (registries, recipes, tags, loot, worldgen, config/state, players)
- Output formats: JSON, Markdown, CSV
- Filtering for most dumps (--namespace, --contains, --type, etc.)
- Optional diff tracking to compare dumps over time
- Exports .json to worldsave folder, specifically: <world>/avalorn_dumps/<category>_<timestamp>.<format>
Registry dumps/dump registries # Summary of all registries
/dump blocks|items|fluids # Specific registry contents
/dump entities|blockentities # Entity and block entity types
/dump menus|sounds|particles # UI, audio, visual registries
/dump enchantments|effects|potions|attributes
Data-driven dumps
/dump recipes # All recipes
/dump recipes produces <item> # Recipes that output specific item
/dump recipes uses <item> # Recipes that use specific item
/dump tags # All tags
/dump tags reverse [item] # Show what tags an item belongs to
/dump tags contents <tag> # Resolved tag contents
/dump loot # Loot tables
/dump loot resolve <table> # Full loot table definition
/dump advancements # Advancements with requirements
Worldgen dumps
/dump biomes # Biome registry with spawn info
/dump dimensions # Loaded dimensions
/dump spawns # Spawn rules per biome
/dump features # Placed features
/dump structures # Structures and structure sets
Config / state dumps
/dump config # Server configuration snapshot
/dump gamerules # All gamerules with values
/dump datapacks # Enabled datapacks in load order
/dump datapacks overrides <resource> # Which pack affects a resource
/dump mods # Loaded mods with versions
/dump commands # Registered commands
Player dumps
/dump player # Your own player state
/dump player <name> # Specific player's state
Diff tracking
/dump diff enable # Enable tracking for comparisons
/dump diff disable # Disable tracking
/dump diff clear # Clear history
/dump diff # Show tracked categories
Examples
/dump items filter --namespace minecraft --contains stone
/dump recipes filter --type ShapedRecipe --output iron_ingot
/dump spawns filter --contains zombie --format csv
/dump tags filter --namespace forge
Permissions
By default, DumPy requires OP-level permissions (permission level 2) to run dump commands.
Installation
- Install like any other NeoForge mod.
- Drop the jar into your instance’s
modsfolder. - Launch, then use /dump help in-game.
License
MIT License.
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