What happened this firing
Feature 7/8 bar_l_kurtosis_tau4 COMPLETE: all 16 stages. L-kurtosis tau4=l4/l2 via Hosking-1990 PWM over logret. Oracle <=1e-9 (residual BTC 3.42e-14 / ETH 2.93e-14) with lmoments3 FOSS cross-validation baked into the generator (fail-closed, ~1.4e-14); in-Rust binomial-form brute-force independent leg bit-identical (0.0) to the product-form kernel. Wired 10->11 tuple, 4-source schema-contract green, ADR + mise namespace (6 slash wrappers) added, lkurt:check-full GREEN. Challenge HELD (9 findings: 2 false alarms + 7 refuted, 0 worked). Pushed to PR #544 (now 7 implemented / 0 deferred / 1 pending). Next: feature 8/8 bartels_rank_vn_ratio.