nx_spec_anchor_gate.nx

nx_spec_anchor_gate.nx -- REGRESSION TOOTH for the NXA format spec. The spec is the format's ONLY documentation BY DESIGN ("this file IS the spec"), so a rewrite that drops a normative paragraph is silent contract loss -- MEASURED 2026-07-29: the entire channel-2 PACKED WORLD-DELTA section vanished in the POSE-amendment rewrite and nothing noticed until the seq1285 unit audit re-read the file. Each tooth asserts a normative ANCHOR substring exists. usage: nx_spec_anchor_gate [specpath] (default knowledge/nxa_format_spec.md) Mutation-proof without touching the real spec: run against a COPY with an anchor removed. license_tier: ORIGINAL No hw writes (Rule 26).