Ornith-1.5-35B-A3B-DFlash2

DFlash2 draft for ornith-ai/Ornith-1.5-35B-A3B-MLX-4bit, produced by the no-op-graft + selector-training recipe:

• Trunk: ornith-ai/Ornith-1.5-35B-A3B-DFlash (DFlashV1) weights, copied verbatim.
• Convolutions: attention_conv/mlp_conv grafted as identity (unit self-tap, zero dynamic corrections).
• Candidate selector: hidden_projection + predecessor/successor codebooks trained on features captured from the quantized 4-bit target (741 samples, top-16 hard-negative margin, convs frozen).

Measured (M5 Pro, opencode_sim n=4, engine decode)

Draft	serial	packed B4	speedup
Ornith-1.5-35B-A3B-DFlash (V1)	142.8 tok/s	147.4 tok/s	1.05x
jzinno/Ornith-1.5-35B-A3B-DFlash2 (bf16-trained)	78.3	114.6	1.32x
this checkpoint	190.1 tok/s	316.8 tok/s	1.65x

The bf16-trained DFlash2 underperforms on the 4-bit target — its selector was calibrated to bf16 hidden states. This checkpoint trained on the deployed quant's own features, which is why it scales with packed lanes.

Serving notes

• architectures: ["DFlash2DraftModel"], hidden 2048, dynamic 512, conv_group_size 16, block_size 8, selector top_k 16.
• Requires the RichEngine Hidden2048 draft context core (draft_conv_h2048).