Sculpting Extra Meshes + Curve is a Blender add-on from pixldg that brings mesh-building operations into Sculpt Mode. You can quickly add basic primitives, join objects, apply boolean operations, and set up mirrors without switching modes, and start sculpting any mesh or curve right away.
Beyond primitives, the add-on lets you clone a selected sculpture, add a Mirror modifier and apply it, and add a Boolean modifier that automatically hides the target object. It also creates editable curves that can be sent back to Sculpt Mode with a single click. Version 1.3.0 introduces a capsule primitive, adds a Multires modifier, moves operations into dropdown menus to free up space on the top bar, and changes cloned objects to use the center of the cloned object rather than the world origin.
It's compatible with Blender 4.2 LTS and newer, requires no special permissions, and is released under the GNU General Public License v3.0 or later. Issues can be reported on the developer's GitHub page.