# BS1 audit validation — 2026-09-13

Compiler: main at 2d4e69d. Full 27-layer SigLIP, batch 1, fused QKV, FP8 scale -4, B1024. Randomized reference fixture, FP32 reference, two resident inferences.

Resumed saved extended-search checkpoint (63 attempts) with eight additional steps; final checkpoint records 71 attempts. One accepted improvement, estimated cycles 11,763,240 → 11,762,469. Planning took 218.096 seconds. Numerical cosine: 0.994279241 for both inferences (old build: 0.994264800). Resident host-exchange replay PASS: mean 7.834242 ms / 127.645 images/s (old saved benchmark 7.889857 ms / 126.745 images/s). About 0.7% lower latency; too small to attach significance to host timing variation, but no observed regression.

Original checkpoint and package preserved. input-state.json removes only obsolete default layout metadata from the compatibility context (336 alignment/access-tail entries, 108 empty distinct-elements entries); recipe decisions were not edited. Current compatibility validation remained enabled.

See run.log, busy.log, state.json, model.ipuexe and resident/. Separate saved-layout profile: ../bs1-extended-profile-20260913/model.html.