The ranking-not-sampling observation was measured on the coplanar-shortlist
rescue and is scoped to it now. The angular-resolution bound
theta < d_min/(2a) means the shipped 16384-direction grid resolves axes only
to roughly 120-150 A, far below the 1200 A the accepted maximum admits, and
the failure mode is a plausible sub-cell, not a refusal - the reader raising
fft_max_unit_cell alone deserved to know it cannot work.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EFEJG6WBQv8th4UJFNe53N