nx_swhid_gate.nx

nx_swhid_gate.nx -- GATE for nx_swhid_lib (SWHID, ISO/IEC 18670:2025). EVERY EXPECTED VALUE BELOW WAS PRODUCED BY AN INDEPENDENT IMPLEMENTATION -- git 2.49.0's `git hash-object --stdin` -- and NOT by this code, not by hand, and not from memory. That is the difference between a test and a tautology: a suite whose expectations are computed by the subject passes for any self-consistent bug. This is the estate's ORACLE evidence class: agreement with an independent implementation over published inputs. The vectors were chosen to cross the constructions that actually break: 0 bytes -- the empty-object case a digit loop silently drops 1, 3 bytes -- below one SHA-1 block two 3-byte inputs -- same LENGTH, different CONTENT (a header-only hash would collide them) 11, 12 bytes -- with and without a trailing newline 64 bytes -- EXACTLY one SHA-1 block, before the header pushes it over 256, 1000 bytes -- multi-block, and past the length where the decimal digit count changes license_tier: ORIGINAL