nx_batch_audit_sidecar.nx

nx_batch_audit_sidecar.nx -- READ-ONLY observability sidecar for live-fire batch monitoring. Architecture: This is "Step C" of the surgical 3-step wedge. Steps A (nx_world_state) and B (nx_trace_emit) are the foundation; this sidecar threads them. It does NOT change picks, prompts, or renders -- it observes the existing system's decisions and emits trace spans + continuity verdicts so the user can SEE what's happening instead of staring at a black box. Assumed input schema (one event per JSONL line; production host converts to the in-memory AuditEvent struct via a thin reader, can be NishiLang nx_json parser or Python boundary code): {"batch_id":42,"scene_seq":3,"trace_id":100, "character_id":7,"arc_id":10,"stage_idx":1, "outfit_id":200,"location_id":101,"pose_id":300, "affect_axis":8,"camera_id":500, "day_clock_min":420,"beat_armed":3} "beat_armed" maps to NX_WS_BEAT_* and tells the sidecar whether the existing picker already authorised an outfit/location change at this step. Omitting it -> NX_WS_BEAT_NONE -> any change flags a continuity violation. Pool-utilization tracking: the sidecar maintains parallel histograms (outfit_pool, pose_pool, location_pool, arc_pool) so at batch close it can name the under-sampled IDs. genealogy_id: canvas_qa_verification + opentelemetry_traces + helicone_2025_proxy_observability lineage_id: batch_audit_sidecar_v1