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General Custom Data

Interface injecting API providing data components like functionality for custom data tags.

Fabric
Loaders
Fabric
Downloads on Modrinth
575
Followers on Modrinth
0
version
1
Updated
May 21, 2026May 21
Published
in 2025
This is a library — other mods need it, and it adds nothing to the game by itselfRequired by 2 mods. Download it if another mod needs it.

At a glance

A library: other mods need it — required by 2 mods
Runs on Fabric
For Minecraft 26.1–26.1.2
Works on either side — install it in the game, on the server, or both
Latest version — 2.0.0-beta.10 from May 21, 2026
Requires Fishbone Trehalose and Generic Registry
Where it's needed
In gameoptionalOn serveroptional

Works both in the game and on the server — install where you need it

Game versions26.1–26.1.2

General Custom Data

General Custom Data is a library providing data components like functionality for custom data tags.

Currently not fully featured.

Command

  • `/custom effect list []Print a list of custom effects on theentity`.
  • `/custom effect give [<duration|infinite>] []Add custom effect toentity`.
  • `/custom effect clear [] []Remove custom effect fromentity`.

Data Structure

Compound custom_data: Parent tag.
 |- String id: namespace:path.
 |- List modifiers
 |  \- Compound A modifier.
 |    |- String attribute: namespace:path.
 |    |- Double base: Any.
 |    |- String id: Any.
 |    |- String operation: add_value, add_multiplied_base, add_multiplied_total.
 |    \- String slot: mainhand, offhand, feet, legs, chest, head.
 |- String rarity: Any.
 \- List status_effects
  \- Compound A status effect.
    |- String id: namespace:path.
    \- List episodes: Unordered episodes.
     \- Compound An episode.
       |- Int amplifier: Any.
       \- Int duration: Any. In ticks.

Compound data: Parent tag.
 |- Byte explosion_radius: Any.
 |- Short fuse: Any.
 |- String id: namespace:path.
 |- List modifiers
 |  \- Compound A modifier.
 |    |- String attribute: namespace:path.
 |    |- Double base: Any.
 |    |- String id: Any.
 |    |- String operation: add_value, add_multiplied_base, add_multiplied_total.
 |    \- String slot: mainhand, offhand, feet, legs, chest, head.
 |- String owner: UUID.
 \- List status_effects
  \- Compound A status effect.
    |- String id: namespace:path.
    \- List episodes: Episodes on entities are descending ordered by whose amplifier, ticking simultaneously.
     \- Compound An episode.
       |- Int amplifier: Any.
       \- Int duration: Any. In ticks.

FAQ

How to install General Custom Data?

Install Fabric for your Minecraft version, download General Custom Data for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does General Custom Data support?

General Custom Data has builds for Minecraft 26.1–26.1.2.

Is General Custom Data needed on the server?

Works on either side — install it in the game, on the server, or both

License and source
GNU General Public License v3.0 or laterfree to use and share; changes to the mod itself must be published under the same license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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