CCCL segmented_sort.cu AST chain → traced back to base engine zip →
discovered base patch_ops.sh deploys 10+ files we were missing.
Missing patches that caused real failures:
1. paged_attn.py — Triton context_attention_fwd HANGS BI-V100 GPUs permanently.
Base engine replaces it with _forward_prefix_pytorch pure-PyTorch fallback.
WITHOUT THIS: GPU hang on any prefix-cached request → timeout → 0 score.
2. patch_xformers_sdpa_seq.py — head_dim=256 > cudnnFlashAttn 128 limit.
Qwen3.5 uses head_dim=256. Without this bypass, attention crashes.
3. sequence.py — completion_tokens inflation under chunked prefill.
Bug: get_output_token_ids_to_return(delta=True) with num_new_tokens=0
returns the ENTIRE prompt. 10K prompt × 3 chunks = 30K false tokens.
4. scheduler.py — num_cached_tokens tracking for prefix caching.
5. mamba_cache.py — GatedDeltaNet state management.
6. patch_model_runner.py — prefix_cache_hit stays True in chunked-prefill
chunk 2+, causing undersized block_tables and crash.
Also: conditional qwen3_5.py deployment (CCCL JIT pattern) — if Docker
image already has a working qwen3_5.py (with corex integration), don't
overwrite it. Only deploy ours if the image version is missing.
