{
  "timestamp_local": "2026-09-18 17:53:55 PT",
  "mechanism": "atom_payload_prod",
  "start_step": 3458000,
  "end_step": 3483000,
  "run_steps": 25000,
  "logits_cos": 0.998568,
  "alpha_cos": 0.644693,
  "merges_end": 57772,
  "nxp_last50_mean": 0.08312,
  "chat_coherent_fr": false,
  "verdict": "STOP \u2014 mechanism works in unit test; chat still noise; logits re-collapsed",
  "next_hypothesis": "Retain a multi-atom payload ring (disable/raise atom_flush_every) so copy-bias sees prompt-distinct merged bytes instead of one shared role-prime packet.",
  "checkpoint": "checkpoints/atom_native_obligatory_hard/atom_native.pt"
}