BoomMod

Client Mod for BoomSMP. You get a claim map of the real terrain, walls you can see through, market prices, and a HUD for coins. Rank, coins, and permissions still come from the server.

Works without the plugin. In singleplayer and on other servers it saves mock claims and prices so you can still use the menus. It only talks to a server that is actually BoomSMP.

Three jars: 1.21.11, 26.1.x (26.1 / 26.1.1 / 26.1.2), and 26.2. Pick the one for your game.

Requires Fabric. Fabric API and Fabric Language Kotlin are required (the App installs them). Not affiliated with Mojang.

Features

Map (M) Chunks you have walked, with trees and water. Hover for owner, clan, or claim price. Click to select, Shift-click for a rectangle, then claim, unclaim, or trust from the panel. Cache lives in config/boommod/maps/.

Walls (B) Colored faces on the chunk border. You can see terrain and players through them. Opacity, distance, inner walls, and a shorter option if FPS dips are in settings.

Market (K) Item icons with the x1 price and what your inventory is worth. Same numbers on hover. Open an inventory and a sell list sits next to the slots.

HUD Coins, status, and the item in your hand (icon and price). Toggle them separately, drag the boxes, and give each one a dark background if the sky or the End washes the text out. Settings, Edit HUD.

Staff lines (mod-mode, rare drops) only show if the server turns them on.

Settings (O) also on the pause screen and in Mod Menu if you have it. Borders, HUD, map, standalone, telemetry.

On BoomSMP, staff can see the mods you installed (the jars, not nested Fabric libraries).

Telemetry (in settings) Off by default. If on, BoomSMP gets OS name/version/arch, Java vendor/version/VM, heap (max, allocated, free), CPU count and name, GPU name/vendor (all adapters, e.g. RTX 5070 plus an iGPU), window size, GUI scale, and language. Other servers do not.

Keys

M map, K market, B walls, O settings. Shift-click on the map selects a rectangle.

Config: config/boommod.json.

Made for the BoomSMP pack and mc-boom.de. You can run it elsewhere. Claims and prices there stay local until a server runs the plugin.