What happened this firing
Feature 4/8 (bar_ehlers_increment_asymmetry — whether up-moves and down-moves are lopsided in size) COMPLETE — all 16 stages green; the batch is now HALF done (4/8, 0 deferred). E=sum(d^3)/sum(d^2)^1.5 over raw close first differences (no ln); a continuous estimator but the diffs are exact by Sterbenz so the residual is just ~2 ULP (6.9e-17 BTC / 2.8e-17 ETH) — ~12 orders under the 1e-9 gate. This fire finished the feature: the ADR, ehlers:* mise tasks + slash commands, ehlers:check-full GREEN, and a per-feature Attacker+Defender challenge (10 findings, 9 refuted, 1 worked — added an in-Rust brute-force that computes s2^1.5 as s2*sqrt(s2), a different libm path than the kernel's pow, giving ehlers parity with rrbicov/signflux's dual-implementation defense AND cross-validating the pow path; also clarified the Sterbenz claim). Batch PR #544 updated to 4 implemented / 0 deferred. Next: feature 5/8 — bar_cox_stuart_trend_z (a robust trend test: are later prices systematically higher than earlier ones).