feat: implementing vulkan backend#557

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Farenheith wants to merge 8 commits into

antirez:mainfrom

Farenheith:vulkan

Commits on Jul 13, 2026

feat: implementing vulkan backend
Farenheith
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Vulkan: sync shaders+C++ 2D grid, per-ctx DS, RADV decode crash doc
Farenheith
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Vulkan: add simple decode-only matmul shader to isolate RADV crash
Farenheith
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FIX: use separate descriptor set for matmul_f16 (was reusing ds_q8c)
Farenheith
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Clean matmul_f16 dispatch with barriers, remove debug skips
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FIX: vkResetDescriptorPool between prefill/decode to recycle accumulated DS
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Vulkan: implement llama.cpp-style CB rotation + pool cleanup, cap w_size, add TRANSIENT_BIT
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Add updated skill archive with full debugging trace
Farenheith
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