Auto Replace

Select a region · mass-break · mass-fill — server-side, so blocks stay gone.

AutoReplace is a lightweight Fabric utility for Minecraft 26.2. Select a box like Litematica and break or fill the entire area in one action. Breaks and fills are executed on the server, so nothing reverts in singleplayer or multiplayer.

📋 Features

Area selection — right-click two corners (cyan outline, Litematica-style)
Mass break — break one block inside the selection → matching blocks in the box break server-side
Mass fill — pick a block from your hand or the world and fill the selection automatically
Simple Z menu — clean panel with toggles, tooltips, and a fill block preview
Server authority — no ghost blocks / no "blocks come back" failure
Paper plugin (optional) — same-network support for Paper/Spigot multiplayer servers
Safety caps — max 4096 blocks per action, range checks, unbreakable blocks ignored

🎮 How to Use

Press Z to open the menu
Enable Selection mode
Right-click the first corner, then right-click the second corner
Choose what you want:

🔨 Break

Turn Auto-break on
Mine one block inside the selection
The server breaks the rest (same block type if "Same block only" is on)

🧱 Fill

Hold a block → Use held block or Pick from world and right-click a block
With Fill on select enabled, the selection fills automatically
Or press ▶ Fill selection

⚙️ Menu Options

Option	Description
Auto-break	Mass-break when you mine a block inside the selection
Selection mode	Right-click two corners to set the box
Same block only	Only break blocks matching the one you mined
Drop items	Survival drops (Creative never drops)
Use held block	Set fill material from the item you're holding
Pick from world	Right-click a world block to set fill material
Fill on select	Auto-fill after picking a block
Replace blocks	Fill existing blocks (not just air)
▶ Fill selection	Place the chosen block throughout the area

📦 Requirements

Item	Specification
Minecraft	26.2
Loader	Fabric
Dependency	Fabric API
Java	25+ (game requirement)

🎮 Singleplayer

Only the mod + Fabric API in your mods folder.

🌐 Multiplayer (Paper / Spigot)

Players install the mod + Fabric API on the client
Put AutoReplacePlugin in the server plugins folder
Restart the server

Without the plugin on Paper, mass break/fill will not persist.

⌨️ Controls

Key	Action
Z	Open / close menu (rebindable in Controls → AutoReplace)

⚠️ Notes

Adventure / Spectator modes cannot break or fill
Unbreakable blocks (e.g. bedrock) are ignored
Survival fill consumes items from inventory; Creative does not
Large selections are capped at 4096 blocks per action

🖼️ Gallery (optional screenshots)

Cyan selection box in the world
Z menu panel with toggles
Before / after mass break
Before / after mass fill

📄 License

CC0-1.0 (public domain dedication) — free to use, modify, and redistribute.

👏 Credits

Developed Black_br 26.2 with server-side networking so selections actually stay.