Herzium

Separate Fabric builds for Minecraft 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2, 26.2 and 26.3. Choose the JAR matching your exact game version.

• A click that lands just before its key goes with that key. With two hands, the click of a key-and-click pair sometimes lands a few milliseconds first. Vanilla forgives that inside a tick; 1.12.0 ran that click with the item of the step before: a second glowstone instead of the detonation, and the loop one click late. Now a click pressed up to 30 ms before a hotbar key goes with that key when it is the only one waiting and the item in hand has already had its click, or cannot be used at all (an empty hand, a sword, a mace, a totem). A first click with an item keeps the order you pressed.
• The core has no switches. Split bursts, Offhand sync, Hold guard and Ignore key repeat are always on. Strict attacks, Mouse-like keys and One click per tick are gone, and attacks run as in Vanilla.
• Combat items too is off in a fresh install: swords and the other combat items keep Vanilla's equip animation, which shows the attack cooldown starting again. A saved setting is kept.
• Four tabs: Order, Feel, Monitor and KoHs. The Monitor counts the clicks that went with their key, and the first time it sees a slot change after a click it writes in the log which mod sent it.
• Measured against Grim Anticheat 2.3.74 with its experimental checks on, with a player's own keys and kit: no alerts, and no tick Vanilla could not send. The audit is in docs/audits/AUDIT-1.12.1-slips-and-core.md.

Your saved order and Feel switches are kept when you update.

Requires Fabric Loader 0.19.3+. Minecraft 1.21.x uses Java 21; Minecraft 26.x uses Java 25. Install Fabric API for localized mod text and Mod Menu to reach the settings button. Client-side only.