Use when working with the Atomsk command-line tool to create, convert, or modify atomic structures (formats like LAMMPS, VASP/POSCAR, QE, XSF/CFG), apply options (duplicate, orient, orthogonal-cell, reduce-cell, add/remove atoms), and run special modes (create, merge, polycrystal, interactive). Ideal for building supercells, introducing defects, format conversion, or preparing inputs for MD/DFT codes.