PCF6: Ministral Publication Confirmation Successor

Status: prospectively frozen on 2026-08-11 before PCF6 admission or compute.

PCF1 through PCF5 remain closed with formal scientific result null. PCF5 passed preparation, then its H100 mechanics job stopped after one second, before runtime verification, prepared-input binding, model verification, scratch creation, CUDA, or model load. Slurm automatically inserted SLURM_EXPORT_ENV; that metadata value duplicated the entire export payload and therefore contained the hash-pinned historical Python directory name product-reasoning. The GPU firewall rejected the metadata string. All 27 never-started descendants were cancelled, the queue was emptied, and the prepared assessor remained sealed with zero semantic reads. Preserve SHOHIN_PCF5_TERMINAL_INFRASTRUCTURE_RECEIPT_20260811.json.

The user has explicitly directed continued pre-science infrastructure repair in pursuit of Shohin. PCF6 is the separately named, prospectively declared successor. It inherits every scientific and security clause of PCF1 through PCF5. The host, model revision, source bytes and hashes, split, prompts, arms, seeds, training geometry, candidate policy, thresholds, single assessor open, and conjunctive terminal gate are unchanged.

Its sole repair is GPU environment projection. SLURM_EXPORT_ENV is Slurm-generated control-plane metadata that repeats --export; it is removed before any child process. Every actual environment variable and value remains present and is scanned under the unchanged protected-term firewall, including the sole exact Python-entrypoint exception. Removing the duplicate metadata does not admit or suppress any actual data, model, output, assessor, holdout, product, or public variable.

Before a graph, run exactly one no-model H100 environment canary. It must prove that SLURM_EXPORT_ENV existed before filtering and is absent afterward, that the complete actual GPU environment passed the firewall, that the allocation is one eligible H100 on normal, and that no model or score was opened. If the canary passes, preserve its receipt, replay the full live preflight, and submit one PCF6 graph. Disable requeue, retries, and automatic successors. Any infrastructure failure, formal PASS, or formal FAIL ends PCF6. Do not change or open an alternate host, data split, prompt, arm, seed, threshold, or protected board.