Auto Lunge swap
Spear combat in modern Minecraft rewards precision, and nothing punishes sloppy inputs faster than a mistimed lunge. The Auto Lunge swap mod removes that friction entirely. Instead of juggling hotbar slots mid-fight, you press one key and the mod handles the entire sequence: it selects your Lunge spear, jabs, and returns your previous item, all inside a single game tick.
This is a client-side Fabric mod built for Minecraft 1.21.11, the version that introduced both the spear and the Lunge enchantment. If you have been looking for a clean way to download Auto Lunge swap and tighten up your melee game, here is everything you need to know before you install it.
What Auto Lunge swap Actually Does
At its core, the mod automates a swap macro that skilled players used to perform by hand. A spear jab is only accepted when the attack bar is fully charged, and that bar recharges according to your attack speed attribute. Because the server refreshes attributes from your equipment once per tick, a jab thrown in the same tick as an item switch is judged using the attack speed of whatever you were holding before. The held stack, along with its Lunge enchantment, is already the spear.
That quirk means your carrier item sets the pace. With a bare fist, you get a lunge every 5 ticks, roughly four per second, compared to the spear's native 13 to 23 ticks. Auto Lunge swap parks you on an empty hotbar slot by default, lunges from there, and hands your original item back the moment you release the key.
Core Features
- Press once, lunge once: a tap is remembered for a few ticks, so slightly early presses still fire.
- Hold to chain: lunges repeat as fast as your carrier item allows.
- Automatic carrier: hold anything when you press the key and the mod sorts out the rest.
- Automatic spear detection: picks the hotbar spear with the highest Lunge level, or you can pin a fixed slot.
- Safety checks: respects the vanilla hunger requirement, never interrupts eating, drinking, or charging, and never fires with a screen open.
- Toggle key with an action-bar message, so you can switch it off mid-session.
- Zero HUD clutter and a fully vanilla input path, meaning the jab travels through the same client routine as a real left click.
Controls and Configuration
Binds live under Options, then Controls, then Auto Lunge Swap. The default lunge key is V, and O toggles the mod on or off. Everything else is handled through config/autolungeswap.json, where you can adjust the master switch, hold-to-repeat behavior, input buffer ticks, minimum hunger level, carrier mode, swap-back delay, and whether spears without the Lunge enchantment are ignored.
If you would rather skip manual file management, the foxygame.net launcher offers a one-click install path that drops Auto Lunge swap straight into your mod profile, keeps it updated automatically, and checks version compatibility for you before launch.
How to Install Auto Lunge swap for Minecraft
Getting set up takes only a few minutes, provided your environment matches the requirements.
Requirements
- Minecraft 1.21.11. The spear and Lunge were added in this version, and 26.x builds are not supported.
- Fabric Loader 0.16 or newer, plus Fabric API.
- Java 21.
Installation Steps
- Confirm you are running Minecraft 1.21.11 with a matching Fabric Loader profile.
- Place Fabric API in your mods folder first, since the mod depends on it.
- Add the Auto Lunge swap jar to the same mods folder.
- Launch the game, open Controls, and confirm the V and O binds are registered.
- Load a singleplayer world and test a few taps before taking it anywhere else.
Important Caveats Before You Use It
Attribute swapping is technically a vanilla bug, tracked as MC-28289. Mojang has stated it is not supported functionality and intends to fix it, having already removed it in a 26.2 pre-release before temporarily restoring it. On top of that, many PvP servers and anti-cheat systems treat swap macros as cheating. Use Auto Lunge swap in singleplayer or on servers whose rules explicitly permit it, and remember that you are responsible for where you run it.
Also keep an eye on your hunger bar. Every lunge costs 4 times your Lunge level in exhaustion, so a Lunge III spear burns roughly one and a half drumsticks per lunge. Carry food.
Final Thoughts
Auto Lunge swap is a focused, well-behaved utility for players who want consistent spear pressure without hotbar gymnastics. It respects vanilla input paths, stays out of your HUD, and gives you fine-grained control through a simple JSON config. If you are on Minecraft 1.21.11 with Fabric and you understand the risks around swap macros, it is a genuinely useful addition to your combat toolkit.