After reviewing the replication and literature evidence gathered in prior task items, I select the HOLD branch.
Replication energy-above-hull: Independent e_hull evaluation confirmed the original value within computational uncertainty (±15 meV/atom), supporting structural validity.
FM vs AFM comparison: Spin-polarized DFT showed FM ordering is energetically preferred by ~23 meV/f.u., consistent with predicted magnetic ground state.
Phonon audit: Existing phonon output audited; incomplete (missing full BZ imaginary mode check) but no definitive instability confirmed.
Literature note: Fe-W phase diagram review confirmed Fe17W3 is not listed in established phase diagrams, marking it as a novel candidate.
Rationale: Evidence supports structural and magnetic validity but is insufficient for GO due to missing large-cell MAE calculation, incomplete phonon stability check, and no experimental synthesis data.
Added: This checkpoint, MAE capability request
Removed: None
Deferred: Large-cell MAE calculation pending capability confirmation