File listing pages can show multiple Minecraft versions and loader builds together. The safest approach is to read every file label as a compatibility statement rather than downloading the newest-looking filename blindly.
Read the game version first
Start with the Minecraft version shown for the file. A release for 1.20.1 is not a substitute for a 1.21.1 instance even if the mod name is identical.
Then match the loader
Current 1.21.1 releases are labeled separately for Fabric and NeoForge. Keep those environments separate and choose the build that matches your configured instance.
Check relations and dependencies
Supplementaries lists Moonlight Lib as a required dependency. Dependency pages are useful because they reveal whether a startup error is actually caused by a missing library rather than Supplementaries itself.
Related guides
Continue with the focused guides in the sidebar or return to the full Supplementaries Mod guide library.