nx_swhid.nx

nx_swhid.nx -- thin CLI over nx_swhid_lib. Compute the ISO/IEC 18670:2025 identifier of a file. The construction lives in the LIB so this command line and any in-process consumer prove the SAME code, and so the gate can IMPORT the logic rather than fork this binary -- a fork is a boundary the mutation harness is blind across, and a gate that cannot be mutated returns a GREEN that reads like a proof while proving nothing. WHY A LIBRARIAN EMITS THIS ALONGSIDE ITS OWN sha256 AND NOT INSTEAD OF IT: the SWHID is what the WORLD can check -- computed identically by everyone, from the bytes alone, with no registry and no forge in the loop, and accepted as an identifier by SPDX 2.3 Annex F and DataCite 4.7. The sha256 plus byte length is what WE trust, because SHA-1 has chosen-prefix collisions (SHAttered, 2017) and is therefore an interoperable NAME, never tamper evidence. Emitting only the SWHID would be a downgrade wearing a standard's number. license_tier: ORIGINAL