The A1 compose shipped (#546) without the 'Hardware metadata' block every
sibling carries, so preflight_compose_gpu_fit logged 'WARN: compose has
no hardware metadata; allowing boot' and skipped enforcement — visible in
guybrush01's #548 report. Add the block (min-vram 24 / gpu-count 2 /
TP 2 / Requires-sm 8.0+ — Marlin FP8 weight-only needs sm_80, unlike the
sibling's INT4 7.5+); preflight now parses + enforces (live rc=0).
Also propagate the #548 finding as Caveats (4): Blackwell sm_120 hits an
upstream vLLM v0.24.0 kernel-selection bug at boot ('QKVParallelLinear'
has no attribute 'workspace' — Cutlass W8A8 selected, a Marlin-path
attribute expected). Workaround shipped as a commented env line
(VLLM_TEST_FORCE_FP8_MARLIN=1 — forces the exact weight-only path this
compose's gate validated; verified present in the v0.24.0 image) +
mirrored into the registry status_note so switch.sh's NOTE carries it.
Gates: compose_meta_get parses all 4 keys; docker compose config valid;
test-compose-status-drift / registry-disk / preflight-gpu-fit green;
full scripts gate green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm
ff96f89506