esh-pfi-infrastructure/persistent-memory.d/2026-09-08-run5-rescued.md

[2026-09-08] ERP-seat SFT run 5 — gate = RESCUED (landmark R49.5)

The FIRST arm of the R47 ERP-seat line where the capability gate did NOT fail. Operator launched it directly to infra-ops ("yes go, launch run 5", the relayed grant operator-2026-09-07-rnd-run5 closed in-session per the no-relayed-auth rule). Brokkr built the corpus; infra-ops staged + launched + served the gate.

The result

• RESCUED. Structure of the loss was the lever, not its mass: the dependency-forcing slot (GovReport 496 + QMSum 97, only 3.46% of loss at 20% ctx) broke the diversity↔coherence coupling that run 4 (STILL-COUPLED, 20.6% instruct slot) and 3c (20× LR cut) could not. INERT did not fire.
• Mechanism: T4 long-context 8/8 (run 4: 5/8; base 8/8); t4_dissect noise@31 tuned 0.9062 vs run-3 tuned 0.5625; diversity held (rp density 3.37→0.00, story 2.86→1.58).
• Reported-beside (not in the cell, de-gated + stated): T3 constraint 8/8→6/8 (a NEW loss, ship-path list); RP length 68w vs the 250-floor = PARTIAL fail (short-QA slot + style shift); refusal erosion rides with the style shift (k=25 both arms, CSAM clean, benign 99/100); free-check base LEVELS 5–6pp below run 4 on identical bytes/stack (a generations shift, vLLM 0.28.0 unchanged — infra confirmed; taxes every cross-run number).
• Write-up: brokkr-smithy research/R47-premium-corpus-gate/run05-gate/RESULT-run05-gate.md; FLOOR-LOCKED 0f3e4e2 cites infra-ops' base index-sha 907826a6.

The run (infra side)

• pfi-gx10 (GB10, sm_121, aarch64), 524 steps / 1 epoch / ~11.8 h / 81 s/it, train_loss 3.235; adapter verified (410 tensors). Launch gates all passed: 7/7 root shas + shard hashes, survivor join 8,212 = recipe, holdout disjoint, window_count belt-and-suspenders (govreport 496/496 + qmsum 97/97 fit_whole), realized [mix] slot loss 3.46% (pred 3.4%). provenance.json carried the override id + both blockers + all substitute controls.
• Gate served on gx10:8098, base→tuned, name-keyed swap, hands-off honoured; base sha + vLLM-stack answers on the record before Brokkr needed them.
• Canonical: eshpfi scripts/erp-tune-gx10/ (run-05-gx10.json, launch-run-05.sh, build_r5_survivors.py) + docs/runbooks/gx10-run-05.md. survivors-r5 = survivors-r4 − airoboros + govreport+qmsum whole (kvasir held byte-identical), sha a25169a6.

Seat + open decision

erp-tune-v5 served on gx10:8098 (merged-run05); LiteLLM trial alias repointed 3c→v5 (operator 2026-09-08) — verified end-to-end. Seat is hand-launched (vllm-run05.pid, no systemd) — dies on a gx10 reboot, yields to next training (~6 min re-serve). OPEN (operator + brokkr): accept RESCUED-on-stock, or source a bf16 abliteration + re-run — now evidenced, see 2026-09-08-base-provenance-stock.

Commits: 265357e (launch) · 37f2caa (RESCUED memory) · f8a7985 (trial→v5).