nx_coach_curriculum_lib.nx

nx_coach_curriculum_lib.nx -- the CURRICULUM-COACH engine as a PURE CORE (no main), extracted verbatim from nx_coach_curriculum.nx so a second discipline can ADOPT the engine instead of forking it. WHY THE EXTRACTION. nx_coach_curriculum.nx was a lib wearing an organ's clothes: the whole engine plus a main(). Nothing can import a file that defines main(), so the only way to reuse it was to copy it -- which is exactly the duplication the estate is already RED on (179 cross-tree dup basenames). The estate already has the split convention (nx_gate_verdict / nx_gate_verdict_lib); this applies it here. The organ keeps its main() and imports this; behaviour is unchanged and proven by re-running it. THE ENGINE, unchanged: assess -> serve the FRAMEWORK from the store -> the person practises -> grade the SELF-REPORT (a bitmask of which framework elements they used) against the checklist -> name the MISSING element -> hand back its drill. "Coaching is coaching": the framework's required elements are the target chord, the reported elements are the played notes, missing is the gap. Works for any discipline whose technique decomposes into nameable elements -- interpersonal frameworks, or a knife on a board. Frameworks are DATA in knowledge/store/coach-curriculum- (rule 11), so a new discipline is rows, not code. license_tier: ORIGINAL No hw writes (Rule 26).