nx_arc_anchor.nx

nx_arc_anchor.nx -- discover recurring scene-motif tuples. An "arc anchor" is a tuple of co-occurring terms that recur across the ingested corpus and together identify a scene archetype: e.g. (OUTFIT=apron, LOCATION=kitchen) -> "domestic intimacy" anchor; (OUTFIT=robe, LOCATION=bedroom) -> "morning intimate" anchor. Discovery is BOTTOM-UP: nx_term_cooccur counts pairs across beats, and we surface the top-K pairs whose role combination matches one of the anchor templates. No hand-written motif list -- the templates are STRUCTURAL (which role-pairs are scene-archetypal) and the actual terms come from the registry. Per cardinals: feedback-self-surfacing-intelligence: anchors enter at STAGE1 SUPERVISED. Promotion happens when the anchor recurs in a fresh corpus, with sighting count crossing NX_ARC_ANCHOR_PROMOTE_N (3) and zero user-rejections. feedback-build-intelligence-never-strip-features: anchors with weak signals stay surfaced as STAGE1 candidates rather than getting filtered out; the user reviews and pins / dismisses. nx_safety_envelope: intended_use: "Surface recurring (outfit + location + character?) scene-archetype tuples from co-occurrence counts." sil_target: SIL2 asil_target: QM dal_target: DAL C iec_62304_class: NONE evidence: [no_floating_point, bounded_loops_per_jpl_rule_2, sealed_anchor_kind_enum, anchor_template_is_structural_not_topical] hazard_register: [bug-tape-anchor-spurious-on-tiny-corpus, bug-tape-anchor-misses-three-term-tuples] residual_risk: "V1 surfaces only 2-term anchors (the most