Server-side Vein Miner & Tunneler

When a player mines an ore block from the configured list, every identical neighbor is mined as well, repeating until no matching blocks remain. A giant vein, including tuff, can be cleared in a single pass, and the affected block types and the restriction on giant veins are set in the server config. Mining stops early if the tool is about to break, a behavior that can be switched off, and holding shift blocks or allows the effect depending on the player's settings.

Vein mining only triggers when the right tool is held. Each mined block still applies the tool's enchantments, so Fortune, Silk Touch and Unbreaking behave as they do in normal mining, and durability is spent as usual. Individual players can turn the mod or the giant vein feature off for themselves with /svmm disable, and back on with /svmm enable.

The mod runs only on the server, so vanilla clients can join without installing anything. It is open source under the GNU General Public License v3.0 or later, and it can also be placed on a regular Forge client for single-player worlds. Settings live in svmm-config.toml inside the world's serverconfig folder, and per-player files are created for each player who logs in.