preflight: gfx1151's aspect ladders; every check that can run on rocm7 now does

[glennneuber]

The rocm7-0-34-4-dynres profile recorded no aspect ladder, so check_aspect_ladder read SKIP on all three arches. That was the last check skipped for want of an expectation on gfx1151. This records the three ladders, at the maintainer's word.

Measured

Measured 2026-09-29 on the promoted image 0.34.4-dynres-0-gb43ee8e, in a bench container with production's environment. The measurement makes the check's own probe calls: image_prefix (B8), then visual_tokens at 4:3, 4:1 and 1:1, the axis the 16:9 ladder cannot move. Each aspect_ladder line is the generator's output (aspect_measure.py in the run directory), pasted whole (ADR 0012 rule 8).

arch	model	1024x768	1920x480	768x768	why
nemotron_h_omni	nemotron3:33b-q4_K_M	770	902	578	native grid at stride 32
gemma4	gemma4:31b-it-q4_K_M	1066	1058	1091	fills the 1120-token budget at stride 48; equal to mlx-metal's row
qwen35	qwen3.8:27b-q4_K_M	1038	1026	1026	raised to the 1024-token minimum at stride 32

Each value is its grid plus the two marker tokens. The comments in expectations.toml give the grids.

Verified

A preflight with the new entries ran on the same image and environment, with --quality: VERDICT PASS, PASS=27 SKIP=5, against 24 and 8 before.

• The aspect ladder passes 3/3 on every arch. Quality (1.00 on every measure) and the fp16 canary pass as before.
• The five that still skip are the four Metal and MLX checks and qwen35's pinned budget. None of them applies on gfx1151, so every check that can run on rocm7 now does.
• The run record is committed as runs/preflight-rocm7-0344-aspect-gb43ee8e.json. The README's matrix columns do not change. Its source comment now names this run as gfx1151's newest, and the regenerated table equals the committed one byte for byte.
• The gate's baseline section records the step, and the profile's own note lists what was recorded after its first run.

Checks

• test_verdicts.py: OK.
• check_source_paths.py --changed-since origin/main is clean.
• The run record contains no host paths or names, and the name scan of the diff finds nothing.

amd-server/rocm-gfx1151

🤖 Generated with Claude Code