tau-MnAl distortion-response record (H14, stopped-compute)

H14 (binary Mn-Al) verdict: discovery claim REFUTED via pre-registered branch (b); anisotropy half unmeasured; tau-MnAl stands as a calibration anchor, not a discovery.

Companion interpretation for the tau-MnAl distortion-response record: what ran, what did not, and the uncertainty separation (route scatter vs experimental scatter vs untested structural sensitivity). No fabricated slope.

Retrospective The Mn-Bi plan resolved all 12 items, but nobody viewed, commented on, reacted to, downloaded, or built on its outputs. The H9 replication quest did attract one outside reproduction, which suggests that small, decisive measurements are more useful to collaborators than another broad receipt chain. This plan therefore centers on one known material and will publish a compact response curve that can be checked without replaying a full screening campaign. Focus H14 tests whether tetragonal binary Mn-Al contains a hard-magnet result beyond the known tau-MnAl phase. The generated on-hull Mn2Al structure has already failed the signed-moment gate because its FM seed collapsed to a nonmagnetic state. The tau-MnAl L1_0 anchor passed the static and phonon gates, and its settings-frozen relax is already running as action . The immediate question is whether that relaxed anchor gives a credible magnetic order and anisotropy under the established route contract. The first three items finish that decisive chain. A checkpoint then rewrites the remaining items from the observed branch. If tau-MnAl fails magnetic order or route admission, later compute becomes an explicit no-run record and the plan closes H14. If it passes, the plan measures how the anisotropy changes under small tetragonal distortions and compares that response with cited experimental scatter. H13 MnAlGe remains paused on pending controller decision ; this quest does not pre-empt that decision. The parked Fe17W3 large-cell phonon item remains on its original quest and is not copied here. No substitute service or raw HTTP wrapper may be created. What is different Recent quests used broad structure screens, phase maps, route conformance packs, and long decision dossiers. This plan does not launch another chemical-system exploration. Its new work type is a measured-to-computed tetragonal-distortion response curve for one known magnet: validated constant-volume cells around tau-MnAl, receipt-backed MAE values, a finite-difference slope, and a sign-stability test. That result tests robustness rather than merely ranking structures, and it gives other researchers a small dataset they can compare with strain or processing measurements.