v0.3.3: the October 12 vLLM nightly pin, four-card decode step 15.0 -> 14.3 ms, BetterBench 177 -> 188

The image pin moves to the 2026-10-12 vLLM ROCm 10 nightly: Flash-Next on four cards decodes a step in 14.3 ms
(v0.3.2: 15.0), 225 tok/s single-stream, with the same kernels, the same quality gate and the same KV cache.
The code of v0.3.2 plus the pin, the October compatibility fixes it rides on (notes/vllm-upgrade-2026-10.md), and
round 4 of notes/decode-step.md.

What changed for someone running it

• docker/Dockerfile builds on vllm/vllm-openai-rocm:nightly-rocm100-fe4df3df... (vLLM 0.31.1rc1.dev296,
  torch 2.12+rocm10.0) instead of the September nightly. Rebuild the image; on a host that needs the
  emulated-switch overlay, regenerate its patched pair for this image (overlay/emulated-switch/patch-hostcall.sh)
  and point ~/p2p-patched-nightly at it.
• The upstream DFlash draft-model exclusion bug (vllm#61003)
  is still present in this nightly; the plugin's alias workaround covers it (the 27B's drafter runs at full
  acceptance).
• R9K_MOE_ROUTE=r9k / R9K_MOE_FOLD=r9k (off since v0.3.0) do not start on this vLLM: the runner's forward
  changed shape. They stay off and were not re-ported (worth 0.13 ms a step on the old one).
• New in the tree, off: the fused MoE decode path (R9K_MOE_FUSE=1: silu(gate) * up in the gate_up GEMM's
  epilogue, the fp8 row quant inside the down GEMM's A-load; bit-identical outputs, tests/test_moe_fused.py).
  It measured the same step time as the three-launch path, so it ships switched off.
• A cold torch.compile cache on a new image makes the first launch's 8-stream numbers read 20% low (compile
  transients during the first requests of that batch shape); the second launch is representative. The validation
  below warms the cache first.

Numbers (test box, 4x R9700, 210 W and -42 mV)

Flash-Next TP4, warm cache	v0.3.2 (Sept nightly)	v0.3.3 (Oct 12 nightly)
decode step, 512-token essay	15.0 ms	14.3
single-stream decode (probe)	219 tok/s	225
BetterBench combined decode / 1 / 2 / 4 / 8 streams	176.8 / 172 / 261 / 403 / 514	188.0 / 175 / 277 / 410 / 530
8 / 16 streams (concurrent bursts, draft counters)	617-623 / 841	608-622 / 868
8k prefill	6,729-6,753	6,723-6,780
KV cache	515,577 tokens	513,088

Validation record

Every configuration on this code, on the pinned image, 2026-10-13: Flash-Next TP4 full BetterBench (combined 188.0, concurrency 175 / 277 / 410 / 530, KV 518,481 tokens), 25-min mixed soaks on TP4, the 27B and Flash-Next TP2 (690 / 290 / 244 requests, 0 errors), strict sanity under overload, 4-rank all-reduce / all-gather and 2-rank race tests, the single-GPU kernel gates; no MES timeouts on the pinned image. The full record is in notes/release-v0.3.3.md.