scadcoder-qwen3.5-9b-v5

A LoRA fine-tune of Qwen3.5-9B for parametric bio-lab OpenSCAD, for the Tiiny Pocket Lab (v5).

  • Base: Qwen/Qwen3.5-9B (arch Qwen3_5ForConditionalGeneration); vision encoder preserved, language layers LoRA-merged to bf16 safetensors.
  • Run with reasoning/thinking off.

Training data

v5 = v4 plus 1,500 multi-turn repair conversations in the benchmark's own shape: a part description, a flawed OpenSCAD file (one top-of-file parameter perturbed), the benchmark's measurement report of that flawed part, and the correct file. The flawed turn is masked from the loss (it is context only). 10,636 rows, 3 epochs, LoRA rank 32. v4's data: the 7,238 render-verified examples of v2 + 269 rejection-sampled generations (x2) + 680 Claude Opus distilled examples on 17 part families that are not Prompt-to-Bench tasks (x2). Details: https://github.com/ATinyGreenCell/prompt-to-bench (§6.4).

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