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Modded Item Upgrader is now available for Minecraft 26.3 on Fabric, NeoForge and Forge. Includes the inventory upgrade button, animated wheel, searchable reward catalog, recipe-aware economy, server validation, persistent rewards and all 22 languages.
Downloads and installation
Java 25 is required. Install exactly one matching JAR in mods on both client and server. Use the same mod version on all clients and the server.
| Loader | Tested loader / dependencies | File |
|---|---|---|
| Fabric | Loader 0.19.5+, Fabric API 0.161.0+26.3 | upgrade-fabric-26.3-0.8.0.jar |
| NeoForge | 26.3.0.48-beta | upgrade-neoforge-26.3-0.8.0.jar |
| Forge | 26.3-66.0.9 | upgrade-forge-26.3-0.8.0.jar |
These files target Minecraft 26.3 only. The tested NeoForge loader is a beta release.
Verification
- 10,145 core assertions and translation completeness checks passed.
- Dedicated-server integration tests passed for all three loaders, including request validation, payout and player-data persistence.
- Real connected clients clicked the inventory button and completed three upgrade rounds per loader. The wheel advanced through 53–55 animation steps; actual stake consumption and win/loss inventory outcomes were checked.
- Final production JARs were checked for loader metadata, resources, translations and exclusion of development test classes.
TEST-RESULTS.txt contains the validation details; SHA256SUMS.txt covers the three JARs. Source ports and reproducible build instructions are in modern/. Third-party modpack compatibility requires separate testing.