Cube

Command	Permission	Description
/lasers cube delete location <x> <y> <z> [standard|concentrator]	lasers.edit	Destroy every cube currently occupying the given block. Accepts relative (~) and local (^) coordinates.
/lasers cube delete cuboid <x1> <y1> <z1> <x2> <y2> <z2> [standard|concentrator]	lasers.edit	Destroy every cube whose current block lies inside the cuboid region between the two corners. The corners may be given in any order per axis. Accepts relative and local coordinates.
/lasers cube delete player <player> [standard|concentrator]	lasers.edit	Destroy the cube held in hand by the target player(s). Accepts Minecraft selectors (@a, @p, @e[...]).

Note on what gets removed: cubes are the physics objects dispensed by a Cube Distributor. The location and cuboid variants match a cube by its current position, regardless of state, so cubes resting on the ground, carried by a player, or still falling are all eligible. The player variant only removes a cube currently held in hand.

Optional type filter: add standard or concentrator as a final argument to only remove cubes of that type. Without it, every cube type in scope is removed.

Note on command blocks: these commands are typically run from a puzzle-reset command block, for example /le cube delete player @a or /le cube delete cuboid ~-10 ~-5 ~-10 ~10 ~5 ~10. Relative (~) and local (^) coordinates resolve against the command block's own position.