Springboard
by Jab125
Springboard is a Fabric library that transforms Fabric Loader itself, giving other mods early hooks into the class loading process.
What it does
Springboard works at a lower level than most libraries, changing how Fabric Loader loads classes. Mod authors can use it to register extra mod candidates, add entries to the pre-init classpath, and run code at extra-early entrypoints before ordinary mods start. It also lets a mod add exclusions to the class loader and install class transformers that rewrite classes as they load.
The project is aimed at mod developers rather than players. Its author notes that the classes SpringboardCandidateEntrypoint and ClassTransformer are the parts meant for regular use, while everything else in the library is still considered unstable and may change between builds.
Springboard runs on client and server, so the server and every player need it. Files are published for Fabric only, for 13 release versions 1.18 – 1.20.4, and the latest file is 0.2.18 for 1.20.4, an alpha build from 2023-08-19. The code is licensed under the GNU Lesser General Public License v2.1 only and is open source, with public links to the source code and issue tracker.
Key features
Extra mod candidates
Mods can register additional candidates, so Fabric Loader considers them during discovery.
Pre-init classpath entries
Libraries can be placed on the classpath before the pre-init stage begins.
Extra-early entrypoints
Code can run at an entrypoint that executes before standard mod initialization.
Class transformers
A ClassTransformer lets a mod modify classes as they are loaded, through the classloader package.
Gallery
Compatibility
Latest build for each game version and loader.
1.20.x5 of 5 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Incompatible 1
Use cases
Developing class-level mods
Authors who need to change how classes load can build on Springboard instead of writing their own loader hooks.
Who it’s for: Mod developers who need hooks into Fabric Loader's class loading. Players who only want gameplay content have no direct use for it.
Questions
Does Springboard need Fabric API?
Is Springboard compatible with Quilt Standard Libraries?
Which parts of Springboard are stable?
In the catalog
Springboard is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from Jab125
Similar mods
What the author says
I recommend not using any classes in Springboard besides SpringboardCandidateEntrypoint and ClassTransformer as everything else is unstable.
Official listing
- Modrinth page
- modrinth.com/mod/springboard
- Owner
- Jab125
- Published
- 2023-08-19
- Updated on Modrinth
- 2023-08-19
- Facts verified
- 2026-10-15