{
  "grid": [
    40,
    20,
    20
  ],
  "blocker": "Exact propagating-lead surface solve did not return within the 30 minute operational cutoff.",
  "next_step": "Retune the Bragg mirror to 780 nm or replace cyclic reduction with a faster outgoing Bloch-mode solver.",
  "status": "blocked",
  "target_wavelength_nm": 780.0,
  "updated_at": "2026-08-15T20:49:00+00:00"
}