nx_nxa_tier_region_gate_t143.nx

nx_nxa_tier_gate.nx -- THE GATE FOR THE INGEST TIER LADDER (nx_nxa_tier, /compare/modding MD5). SUBJECT: the nx_nxa_tier ELF, forked for real on the banked pre-TEXM house asset (13 sections, TEXC present, 14,164 verts) -- a real artifact that is READ, never written. Every tooth asserts an exit code or a byte read back out of the emitted tier through the format's own verifier (nxa_find checks the TOC and every section checksum before returning), so a tier that merely EXISTS cannot pass. THE DANGEROUS FAILURES THIS GATE EXISTS TO CATCH: a tier whose weights no longer sum to 4096 or name a joint past the skeleton (the pose player would read that as a broken rig), a tier that quietly dropped SKEL or TEXM (a rig-less or map-less cast member wearing a success receipt), a tier that grew or moved outside the source's own bounding box, and a budget that silently UPSAMPLED. Each has a tooth; three have neg-controls. FIXTURES AT RUNTIME in /tmp/nx_nxa_tier_region_gate_t143/, every output unlinked at SETUP and the unlink asserted, so the gate is idempotent. The truncated fixture and the ladder conf are assembled here, never read from source. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0