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HeroBot Mod for Minecraft 1.21.11

Framework for fabric based server side players (and extra helpful settings)

On a server
downloads
90 downloads
views
208 views
Updated
Updated 01.10.2026
  • 1.21.11
  • Fabric
  • Client and server

About the HeroBot mod

This mod is made for datapack makers to make bots that can fight back

The bots have a much higher parity with a vanilla client compared to carpet, with things like Auto-Jump and the spear working.

Incompatible With Carpet Mod and Carpet PVP

Settings

Views and modifies HeRoBot settings via the /herobot command. Running /herobot with no arguments displays the mod version.

Usage

  • /herobot - Displays the current value and description
  • /herobot - Sets the setting temporarily for this session
  • /herobot - Sets the setting permanently (saved to config)

Bots

allowSpawningOfflinePlayers

Spawn offline players in online mode if an online-mode player with the specified name does not exist.

Default: true

allowListingBotPlayers

Allows bot players to appear in the multiplayer player list.

Default: true

botPingToTicks

Changes the ping to tick conversion rate for bot players. Used when converting a bot's ping (in ms) to a tick delay for knockback.

Default: 25

botLagAttacks

[Experimental] Makes left clicks (attack) on bot players delayed by the bot's ping value.

Default: false

botLagUses

[Experimental] Makes right clicks (use) on bot players delayed by the bot's ping value.

Default: false

botLeaveOnDeath

Bot players disconnect from the server on death instead of automatically respawning.

Default: false

Creative

creativeNoClip

Creative no clip mode. Allows creative players who are flying to phase through blocks.

Default: false

creativeFlySpeed

Changes the creative flying speed multiplier. Higher values make the client fly faster.

Default: 1.0

creativeFlyDrag

Changes creative air drag. Lower values reduce air resistance while flying.

Default: 0.09

Combat

shieldStunning

Enables shield stunning, allowing entities to be damaged immediately after a shield is disabled.

Default: false

noProjectileRandom

Removes randomness from projectiles, making them perfectly accurate.

Default: false

Explosions

explosionNoBlockDamage

Controls whether explosions destroy blocks.

Values:

  • FALSE - vanilla behavior
  • MOST - affects non-solid blocks except glowstone and redstone-interaction blocks
  • TRUE - prevents all block damage

Default: FALSE

explosionNoFire

Prevents explosions from beds and respawn anchors from creating fire.

Default: false

windChargeNoTrigger

Wind charges won't activate redstone blocks.

Default: false

World / Misc

clientsIgnoreSlowTickRate

If false, makes client players ignore slower tick rates.

Default: true

editablePlayerNbt

Allows editing player NBT data directly. Also allows mounting players via /ride when enabled.

Default: false

xpNoCooldown

Players absorb experience instantly without delay.

Default: false

shulkerBoxAlwaysDrops

Shulker boxes will always drop, regardless of the doTileDrops gamerule.

Default: false

deleteChunkEntities

When enabled, chunk reset/deletion also deletes entity data files within those chunks.

Default: false

rainThroughMovingPiston

Allows rain to fall through blocks being moved by pistons.

Default: false

disableExperimentalScreen

Remove the experimental world setting. If set on the client, disables all experimental screens. If set on a world, only disables it for that world.

Default: false

Bot Player

Bot players are fake players that join the server and can be controlled entirely through commands. They are spawned with /playerspawn and controlled with /player. Bot players have correct server-side behavior for combat, movement, and item usage.

Bot players automatically respawn on death with full health, empty inventory, and no XP (unless botLeaveOnDeath is enabled).

/playerspawn

Spawns a bot player with optional position, rotation, gamemode, and dimension.

  • /playerspawn - spawns at the executor's position
  • /playerspawn at - spawns at a specific position
  • /playerspawn at facing - spawns with specific yaw/pitch
  • /playerspawn at facing - spawns facing a cardinal direction (north, south, east, west, up, down)
  • /playerspawn ... in - spawns in a specific gamemode (defaults to creative)
  • /playerspawn ... on - spawns in a specific dimension

Prevents duplicate names. Respects whitelist and bans. Spectators spawn flying, survival players spawn grounded.

/player

Controls bot players using action packs. All subcommands target with /player ... and support selectors for targeting multiple bots.

use, attack, swing, jump, drop, dropStack, swapHands

Action commands that make the bot perform player actions.

  • /player - stops that action
  • /player once - performs the action once
  • /player continuous - performs the action every tick
  • /player interval - performs the action every N ticks

use without parameters stops using without triggering another use (unlike carpet where it behaved like use once).

swing swings a hand without performing an action and resets the attack cooldown.

attack with a spear/kinetic weapon will perform a stab action instead.

autojump

Controls automatic jumping over one-block obstacles while moving

  • /player autojump - attempts a single autojump (jumps if the bot is moving and would need to step up)
  • /player autojump true - enables continuous autojump
  • /player autojump false - disables continuous autojump

move

Controls bot movement direction.

  • /player move - stops all movement
  • /player move forward
  • /player move backward
  • /player move left
  • /player move right

sneak / sprint

  • /player sneak - starts sneaking
  • /player unsneak - stops sneaking
  • /player sprint - starts sprinting
  • /player unsprint - stops sprinting

How to install HeroBot

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.21.11 on Fabric automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Fabric

    The loader must match the game version of the mod file, for example Minecraft 1.21.11. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file herobot-1.21.11-1.4.3+v260315.jar (244 KB) for your game version.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: HeroBot should be in the list.

On a server

  1. A server on Fabric

    The mod only works on a server with the same loader and game version, for example 1.21.11.

  2. File goes into the server’s mods folder

    Stop the server, put the mod file into the mods folder and start the server again.

  3. Use the “To server” button

    On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.

Minecraft 1.21.11 runs on Java 21: with a different Java version the game may close right after launch.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.21.11Fabric1.21.11244 KB 90
1.21.11Fabric1.21.11207 KB
1.21.11Fabric1.21.11208 KB
1.21.11Fabric1.21.11214 KB
1.21.11Fabric1.21.11208 KB

FAQ

Which Minecraft versions does HeroBot work on?

Only Minecraft 1.21.11: there are no files for other versions.

Is HeroBot for Forge or Fabric?

Only for Fabric: 1.21.11. There are no files for Forge or NeoForge: a mod for another loader will not start.

Does HeroBot need other mods?

The author lists no required dependencies: the Fabric loader is enough.

Does HeroBot work on a server?

Yes. HeroBot works both in singleplayer and on a server.

Which Java does HeroBot need?

Minecraft 1.21.11 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download HeroBot safely?

On this page: the file herobot-1.21.11-1.4.3+v260315.jar (244 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 17aba207e6bd906cae58b1c804f455955a9036b5.

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Author: herobaneLicense: CC-BY-NC-4.0

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