BertholomusAI recipe: DeepSeek-V4.1-Flash served tensor-parallel over two NVIDIA DGX Spark / GB10 nodes by a deepseekv41 model family we wrote for TensorFold (by ashhart). Clean-room: the model math is re-implemented from DeepSeek's MIT inference code and tech report; no code from other DeepSeek-V4.1 recipes or kits was read or copied (ATTRIBUTION.md). Decode and prefill are what we worked on this time. The same release suite on the served lane for both builds (v0.4 = engine bd0024d at --context 262144, v0.5 = 808eb4a at --context 1048576), same client (tools/dsv41/kitbench.py), same prompts, greedy, DSpark drafting. Median of 3 unless noted. four long streams together give the same replies…