Key Binding Patch

The patch works on the vanilla key binding system and lets a binding use modifier keys together with another key. A single key binding can hold several combination keys at once, and key bindings bound to the same key can be triggered together instead of blocking each other.

Other mod developers can register press and release callbacks on key bindings, and the patch can create shadow copies of key bindings so that one action may be reached through several bindings. Only the client needs it: players install it, and servers do not. The mod is published for Forge across 6 release versions, 1.12.2 – 1.20.4, with 1.3.3.5 for 1.20.1 as the latest file, and it is licensed as All rights reserved, so it is not open source. Public source code and an issue tracker are linked.