WS1 C6–C11 Closeout Plan

Parent: #266 Branch: feat/ws1-c6-c11-closeout-266 (from feat/ws1-c1-c5-c8-gtest) Depends on: C1–C5, C8 already on this branch tip

C6–C11 are the remaining EXIT blockers. This landing does not reopen

145–#154. Full-model GPU execute is intended for H20 (user-run); CPU

schema/topology tests stay in ordinary CI.

Remaining children

ID	Issue	What lands
C6	#272	Direct decode vs prefill (attention + selected-logprob), C1 only
C7	#273	Stateful allocate→write→read→decode + generate-rescore; B2 absent
C9	#275	Full Qwen3-8B Dense BI assembly, both profiles, one-command fwd+bwd
C10	#276	#150 2×2 matrix + train/infer on the full model
C11	#277	Required CUDA + Triton BF16 CI entry + report schema

Locks

• Thresholds only from C1 (tolerance_contract.json). No _DECODE_ATOL.
• CUDA and Triton profiles are independent; missing Triton is red.
• Silent / cross-profile / reference-as-candidate fallback is a hard fail.
• EXIT forbids shrinking layers / hidden / heads / vocab.
• Concat-only NativeKVCacheAttnOp is Level A, not C7 B1.
• C9 green ≠ EXIT. C10 + C11 + parent A/B are required to close #266.
• C10 backward_executed compares real tensor.grad for every official trainable leaf. Layout cells participate. Candidate vs FP32 gold uses the three logprob aggregates. Full-model decode covers C6 short/long/ varlen/padding/B=1/N.

Local vs H20

Surface	Where
C6/C7 CPU schema + gold path	ordinary CI
C6/C7 CUDA/Triton CLI	any CUDA GPU
C9 topology / node / profile resolution	ordinary CI (no 16 GB alloc)
C9/C10/C11 full-model execute	H20 + pinned Qwen3-8B weights