nx_ad_emitter_registry.nx

nx_ad_emitter_registry.nx -- LIB: the BUILDER'S LEARNED CATALOG. Every emitter we build (an accent, an animation, a theme, a size) is TAUGHT to the builder by registering it here as DATA; the builder reads the catalog to offer those emitters, and a GROW loop (nx_ad_emitter_grow) generates new ones and registers them -- so the builder keeps growing its own emitters (the emitter-of-emitters loop, in the ad domain). Data-driven (rule 11), append-only + idempotent (rule 10/13). One row per emitter: kind<TAB>id<TAB>label<TAB>template kind in {size, theme, accent, animation}. `template` = the DATA to emit that block (SVG for an accent, a CSS @keyframes+rule for an animation, pipe-joined colors for a theme, WxH for a size). SAFETY (enforced by the gate): a registered template may NEVER contain a <script or src= -> the growing library stays sovereign (0 third-party JS / 0 external fetch) BY CONSTRUCTION. Functions take a `path` so they are hermetically testable; ER_PATH is the live catalog. (TSV registry for inspectability now; seg-store migration = the doctrine follow-on.) license_tier: ORIGINAL