rob thijssen
05e15f3597
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Adds the bf16/fp16 safetensors path alongside the existing GGUF quantized one. The harness now dispatches by ModelSpec.quant: - Some(_) → GGUF (pre-quantized, single-GPU only path, unchanged). - None → safetensors dense (new). The dense path uses candle-transformers::models::qwen3::ModelForCausalLM verbatim, fed via VarBuilder::from_mmaped_safetensors over the files listed in `model.safetensors.index.json` (sharded layout) or the single `model.safetensors` fallback. dtype is bf16 to match the canonical Qwen3 HF distribution dtype. tokenizer.json is fetched from the same repo (no -GGUF suffix to strip). ModelArch gains a Qwen3Dense variant; the forward signature mirrors QuantizedQwen3Weights (same `forward(&Tensor, offset)` → last-position logits), so run_inference / run_inference_streaming just add a parallel match arm — no shape changes downstream. This is the foundation 7b-ii (ColumnParallel/RowParallel) builds on: because the source is dense safetensors that can be byte-sliced per rank, the TP work avoids the GGUF super-block alignment problem entirely. Vanilla GGUF inference keeps working unchanged. validate-neuron.sh learns the dense path: pass an empty third arg (quant) and the script omits the `quant` field from the load payload, triggering the dense dispatch. Example: script/validate-neuron.sh beast.hanzalova.internal Qwen/Qwen3-0.6B '' Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>