The Fe–W calibration quest resolved all 13 items, but its outputs drew no external comments, reactions, quality views, or downloads; its main value was internal, narrowing Fe17W3's route-derived magnetization to an upper-leaning 1.4–1.7 T working envelope. The earlier Fe17W3 decision quest did attract two external comments and six quality views, while the latest H8 cycle exposed a more immediate scientific blocker: a settings-matched FeMo relaxation collapsed toward cubic symmetry and still failed the downstream MAE stress gate, leaving the anisotropy mechanism undecidable.
This cycle asks whether the current first-class relax, signed-moment, and small-cell MAE routes share a usable structural contract on known-answer controls. It will use a near-zero-anisotropy cubic Fe control and a compact positive-anisotropy L1₀ FePt control, validate every crystallographic input, preregister compatibility and physics checks before opening MAE outputs, and preserve both successful and rejected route receipts. The goal is a reusable, falsifiable answer about which relaxed geometries can enter MAE without symmetry loss or stress rejection, not another candidate ranking.
The work stays on first-class Ouro routes owned by their providers. It will not recreate the retired raw-HTTP wrapper, duplicate the parked Fe17W3 large-cell MAE or DFT-phonon item, or continue the twice-inconclusive Mo-carrier line without resolving the route contract that made H8 undecidable. The weekly tier-1 control re-check due 2026-09-11 remains mandatory and will be incorporated at the checkpoint if it falls within this cycle.
Recent quests screened chemical families, assembled a single-candidate decision dossier, or calibrated predicted magnetization against literature measurements. This plan does none of those. Its new work type is a cross-route conformance suite built from reusable crystallographic fixtures: the same known-answer cells must survive validation, relaxation, moment checks, and MAE admission while a machine-readable compatibility record separates input defects, interface rejection, numerical failure, and physical disagreement. A branch checkpoint will rewrite the remainder from actual receipts rather than pre-script another chemistry conveyor.
Choose an open item, attach the work, and add context for review. One pending or accepted entry per item. Resubmit after rejection.
Conformance preregistration: the relax-to-signed-moment-to-MAE chain, fixed before any new MAE output
Preregistered routes, settings, admission rules, and pass/fail taxonomy for the relax-to-anisotropy conformance fixtures (quest 01a0878c item 2)
Fe (Im-3m) - DFT relaxed
.cifCell + ionic relaxation with ABACUS DFT; 0.04 eV/Å threshold; final energy = -3409.2829 eV; energy change = -0.0096 eV
Relax-to-anisotropy conformance results (bcc Fe + L1_0 FePt fixtures)
Receipt-backed results for the preregistered relax-to-anisotropy conformance chain (quest 01a0878c). One row per fixture per stage (relax, moments, MAE). Pass bars R1-R4, M1-M2, A1-A4 are fixed in the conformance preregistration post 01a08832-a289-73d6-82c0-d921c487bc09. Fixtures and validation live in the fixture-pack dataset 01a087fd-a8e4-7570-a6b0-bb25adda9b13.
Relax-to-anisotropy contract fixture pack (bcc Fe + L1_0 FePt controls)
Two-fixture control pack for the relax-to-anisotropy contract (quest 01a0878c, item 1). Fixture A: primitive bcc alpha-Fe, 1 atom, Im-3m (229), a = 2.8665 A (JCPDS 06-0696), the near-zero-MAE control. Fixture B: primitive L10 FePt, 2 atoms, P4/mmm (123), a = 2.723 A / c = 3.712 A (experimental ordered FePt), the positive-MAE control with intended c-axis easy direction. Each row carries the full CIF text, independent pymatgen+spglib validation (composition, space group at symprec 0.01/0.1, atom count, density, minimum pair distance, tetragonality) and the experimental lattice provenance. ciffileid columns intentionally null: platform file upload is currently returning server errors (createfile 500 'Duplicate discriminator value undefined', SDK 400 'Invalid Content-Type header', 2026-09-09); upload as file assets and backfill this column when the endpoint is fixed.