nx_flow_state.nx

nx_flow_state.nx -- F1 first stone of NISHI_FLOW_DOCTRINE_ROADMAP.md. Aggregate flow-state classifier. Composes the substrate's existing measurement layers (nx_perf_pathology, nx_etg outcomes, conductor placement signals, cross-arch parity verdicts, reclamation accounting) into a single sealed-enum verdict on whether the system is currently at its empirical near-edge -- the substrate's flow state. Csikszentmihalyi's nine conditions for flow, translated to substrate-testable signals: 1. Clear goals -> reference band present 2. Immediate feedback -> ETG attestation emitted 3. Challenge-skill balance -> tournament selected variant matching empirical ceiling 4. Action-awareness merger -> conductor placement decided 5. Loss of self-conscious -> substrate overhead < noise floor 6. Distorted time -> N/A substrate tier (human-flow F7) 7. Autotelic -> reclamation > 0 OR all confirmed 8. Concentration on task -> no second-class resources idle 9. Sense of control -> attestation chain complete All eight measurable conditions met simultaneously -> NX_FLOW_STATE_FLOW. Cardinal violations (paywall honored, second-class resources, single-arch overfit, latency spike) -> NX_FLOW_STATE_TILT. Insufficient signals -> NX_FLOW_STATE_BROKEN. Composes: [[NISHI_FLOW_DOCTRINE_ROADMAP]] F1 (this is the first stone) nx_perf_pathology.nx (classifier feeds flow signals) nx_etg.nx (attestation per probe) [[feedback-hardware-agnostic-is-robustness]] (cross-arch parity is one of the nine conditions) [[feedback-jim-clark-racing-line-substrate]] (the racing line IS the substrate's flow state) [[feedback-conductor-heterogeneous-compute-no-second-class-resources]] (P10 is TILT-inducing) [[feedback-reclamation-doctrine-captain-moroni]] (P11 is TILT-inducing) [[feedback-physical-truth-over-published-docs-silicon-empirical-