Version Info

• Minecraft: 1.20
• Core Lib: 1.1.9

Description of the Bug
Mod Menu doesn't classify this mod as a library.
This is probably because fabric.mod.json does not contain this:

"custom": {
    "modmenu": {
        "badges": [ "library" ]
    }
}

You can check Mod Menu's documention.

Steps to Reproduce

1. Install this mod
2. Install Mod Menu
3. Open "Mods"
4. This mod doesn't have the "Library" label it should have

Screenshots