General Custom Data
General Custom Data is a Fabric library that supplies data components for custom data tags, which other mods can build on.
What it does
Custom data tags are stored as data components, and this library provides the functions that let other mods read and write them. It needs Fishbone Trehalose and Generic Registry to run. Builds cover 26.1 – 26.1.2, and it is open source under the GNU General Public License v3.0 or later. Two catalog mods, Pentamana Extra and Etchrara, depend on it.
Key features
Data component access
Mods can attach and read custom data tags through data components instead of writing their own storage code.
Interface injection
An injected API gives other mods access to data component behavior without changing their own item classes.
Client or server use
Either side can run it, and neither needs it, so it can be added to a single-player install or a server alone.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Required by 2 mods
Questions
Does General Custom Data need Fabric API?
Which Minecraft versions are supported?
In the catalog
General Custom Data is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 15,189 mods support Minecraft 26.1.2.
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What the author says
General Custom Data is a library providing data components like functionality for custom data tags. custom_data: Parent tag.  |- id: namespace:path.  |- modifiers  |  \\- A modifier.  |    |- attribute: namespace:path.  |    |- base: Any…
Official listing
- Modrinth page
- modrinth.com/mod/general-custom-data
- Owner
- CookedSeafood
- Published
- 2025-06-22
- Updated on Modrinth
- 2026-05-21
- Facts verified
- 2026-10-15