nx_sevenz_gate.nx

nx_sevenz_gate.nx -- THE 7z READER GATE (/compare/modding MD29 sz_walk, 2026-09-06). The subjects are two REAL archives mirrored from the py7zr test corpus (knowledge/fetched/cmp_modding_py7zr_test_1.7z, an LZMA2 archive with an encoded header, and cmp_modding_py7zr_copy.7z, a Copy-coder archive), never a fixture this lane authored -- a reader tested only on archives its author wrote proves it can read its author. The oracle is the archive's OWN per-member CRC-32 digests written by the outside encoder: every data member must decode to exactly its declared size AND hash to the digest the archive carries, through the decoder nx_lzma_lib and the container reader nx_sevenz_lib, with nothing third-party in the path. Named refusals are planted at runtime (a cut container, a forged start-header CRC, a forged header CRC, a corrupted packed byte) and each must be refused by NAME, never read clean. The rung's done-rule fixture (an OBJ, its MTL, four PNG maps, a VMD) is written by the estate's own Copy-coder writer and must walk to the SAME typed partition MD1's zip fixture reaches, through the lib and through the bundle walker that dispatches on the magic. The command is a second witness through the ladder live -> staged -> build fossil, and an extract is re-hashed by the SAME crc32 the archive used. usage: nx_sevenz_gate (no args) license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0