[Jammy2211]

Summary

B5c-2a, the Cortex ledger for autofit_inference. A new 2026-10-16 result entry sits at the top of ## Log (newest first; nothing backdated). It records:

• the pilot headline numbers: 1040 expected = 749 rows + 177 failed + 4 oom + 0 missing + 110 deferred; 307 accepted and 623 rejected under correlated_nd@1;
• the failure breakdown;
• the new oom attempt class;
• the A2 ruling;
• the freeze sha 44c5e77f1fb0 (44c5e77f1fb0779f675a8f51247d812183e93b48).

## Now now points at B5c-2b (draft/research/autofit_inference/search_ext_b5c2b_scored_wave_submit.md). Both edits were written with scripts/cortex.py log / now. The board was rendered only from this worktree, with _cortex.py dashboard --cortex . --apply; the canonical checkout is untouched. dashboard --check passes, cortex check: OK, and pytest tests gives 65 passed.

Parent: PyAutoLabs/autofit_inference#18 (judge, calibration, freeze). Nothing was submitted, so no run line was added.

Decisions taken

Each one is flagged for the human. Each has a one-line revert.

1. A2 memory headroom is 2×. --mem = max(8 G, ceil(2 × peak)) per cell class (dataset × search × settings, both backends). The peak is the largest sampled sacct MaxRSS, or 8 G when any pilot task was OOM-killed. Sampled RSS undercounts the peak at a kill: task 304 read 3.1 G when it died at 8 G. This raises two cells: d50 Nautilus n_live_400 to 16 G and d100 cold NUTS to 17 G (MaxRSS 8.1 G). Revert: set MEMORY_HEADROOM in calibrate_correlated_nd.py and regenerate.
2. d100 Nautilus n_live_200 is deferred from the scored menu, along with n_live_400 and n_live_100. All 40 n_live_200/400 attempts failed at the pin within 31–74 s, before the first bound was sampled. The cause is nautilus's HDF5 checkpoint: it cannot store a D = 100 bound attribute (h5py "object header message is too large"). Affordability therefore cannot be judged from the pilot walls; for comparison, d50 n_live_200 took a median of 820 s. n_live_100 is deferred by construction: Nautilus needs n_live > D. d100 warm NUTS is deferred with its provider. Revert: drop the entries from _correlated_nd.A2_DEFERRED in a later amendment, after a library or nautilus fix.
3. The OOM cells. d50 Nautilus n_live_100 (both backends) and d50 warm NUTS are deferred by the §7 cap rule, read as "no attempt ended on its own". In each, 9 of 10 attempts hit the 4 h cap and the 10th was OOM-killed before the cap. Revert: calibrate with "every attempt Terminated at the cap" only. Those two cells would then get timeouts from zero completed rows, so they would be probe-first.
4. σ-ratio bands are per task under @2, read literally from "a band moves only on ≥ 20 completed pilot rows of its task". The evidence task moves to [0.85, 1.1] on 79 rows. The posterior task has 1 row, so it keeps [0.5, 2.0]. @1 had one shared band. With a single band, 34 of the 307 accepted pilot rows would have flipped, all of them BlackJAX NUTS (500 samples), judged by Nautilus σ noise. Revert: FROZEN_CND2 bands as plain tuples (one band for both tasks).
5. The evidence calibration set also requires §4(c). This was added after seeing the pilot. 6 collapsed banana Nautilus n_live_200 rows (σ ratios 0.04–0.13) pass the medians against the banana's wide reference σ, and without §4(c) they would drag the lower band edge to 0. Revert: drop the (c) filter in calibrate_correlated_nd.calibrate.
6. New oom attempt class. SLURM's OOM SIGKILL exits 137 under timeout, the same code as the cap's own kill. The pilot submit therefore wrote cap stubs (process wall = the 4 h limit) for the 4 OOM tasks, which would have been counted as censored cap failures. cnd_cap_stub.py --reconcile-oom rewrote them from the committed sacct extract (MaxRSS, real wall). Under @2, an oom run is rerun once at twice its cell's request, and a second oom is a failed attempt. Revert: git revert the reconcile commit.
7. Harness fix in this phase. All 80 Emcee/Zeus pilot rows (d20 and the banana) failed after the search in _posterior.chain_diagnostics, which relabelled by g0.centre. The fix is relabel=False for families with no label symmetry. Pilot verdicts stay @1 (failed). Those 8 cells have no completed row, so they are probe-first in the scored wave. Revert: revert commit b3845e8's _posterior/_runner hunks.

Witness checklist

• The Cortex Log entry and the Insight correlated_nd_pilot row are closed with the pilot verdicts.
• correlated_nd@2 is frozen (autofit_inference 44c5e77f1fb0), and the sha is recorded in both organs.
• NO scored run exists or was submitted in this phase.

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