
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 [<entity>]Print a list of custom effects on theentity./custom effect give <entity> <effect> [<duration|infinite>] [<amplifier>]Add custom effect toentity./custom effect clear [<entity>] [<effect>]Remove custom effect fromentity.
Data Structure
custom_data: Parent tag.
|-
id: namespace:path.
|-
modifiers
| \-
A modifier.
| |-
attribute: namespace:path.
| |-
base: Any.
| |-
id: Any.
| |-
operation: add_value, add_multiplied_base, add_multiplied_total.
| \-
slot: mainhand, offhand, feet, legs, chest, head.
|-
rarity: Any.
\-
status_effects
\-
A status effect.
|-
id: namespace:path.
\-
episodes: Unordered episodes.
\-
An episode.
|-
amplifier: Any.
\-
duration: Any. In ticks.
data: Parent tag.
|-
explosion_radius: Any.
|-
fuse: Any.
|-
id: namespace:path.
|-
modifiers
| \-
A modifier.
| |-
attribute: namespace:path.
| |-
base: Any.
| |-
id: Any.
| |-
operation: add_value, add_multiplied_base, add_multiplied_total.
| \-
slot: mainhand, offhand, feet, legs, chest, head.
|-
owner: UUID.
\-
status_effects
\-
A status effect.
|-
id: namespace:path.
\-
episodes: Episodes on entities are descending ordered by whose amplifier, ticking simultaneously.
\-
An episode.
|-
amplifier: Any.
\-
duration: Any. In ticks.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.1, 26.1.1, 26.1.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
- Ships as general-custom-data-fabric-26.1.2-2.0.0-beta.10.jar — drop this file into the mods folder
- Download size: 69 KB
- Download link checked 5 Sept 2026 — working
These come from our own check of the pack file, not from the source page.