Modern Enchantments Limiter

A NeoForge mod for Minecraft 1.21.1 that limits how many enchantments a single item can carry, so gear stays balanced instead of becoming a stack of every enchantment at once.

Every qualifying item gets a resolved enchantment limit built up from a few optional layers:

Base limit – the starting number of enchantments any item is allowed.
Rarity bonus – uncommon/rare/epic items can grant extra slots on top of the base (works great with mods like Apotheosis).
Random variance – an optional bonus range, derived deterministically from the item and its enchantments so it never changes on its own.
Tag & rarity overrides – override the limit entirely for specific item tags (e.g. #c:tools/pickaxes) or Apotheosis affix rarities, either as a fixed value or a random range.
Min/max clamp – the final result is always kept within a configurable floor and ceiling.

The limit is enforced wherever enchantments can be added — anvils, enchanting tables, and enchanted books — and is applied to enchanted books, damageable items (tools/weapons/armor), or every enchantable item, depending on your config. If an anvil combination would exceed the limit, the merge is blocked and the player is notified instead of silently losing their book.

A tooltip line ("Enchantments: x/y") is shown directly under an item's enchantments, in a configurable color, so players can always see how close an item is to its limit.

Configuration

Settings are split into two files, both under the global config/ folder:

config/modern_enchantments_limiter-server.toml – all gameplay values: base limit, rarity bonuses, random variance, min/max clamp, and tag/rarity overrides. This is the authoritative copy in multiplayer; it's synced to each client once when they connect, so a client's own copy never overrides the server's. (Advanced: a server admin can override it per-world by placing a copy in that world's serverconfig/ folder instead.)
config/modern_enchantments_limiter-client.toml – just the cosmetic tooltip color.

Both are generated on startup (the moment the server/client starts). Both are hot-reloaded automatically when the file changes; if that doesn't pick up your edit (e.g. some editors/network drives, or a dedicated server), run /modernenchantmentslimiter reload in-game to force a re-read.

Note that on a Dedicated Server the server-config changes made while clients are already connected won't update their synced copy until they reconnect — the server itself always enforces the current live value regardless.