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  "instruction": "You are a mechanical CAD engineer. Reconstruct the C-shaped mounting bracket\nshown in the dimensioned engineering drawing as an accurate three-dimensional solid.\n\n## Input\n- Engineering drawing (PDF): `/media/user/data/agenthle/engineering/cshaped_mounting_bracket_construction/base/input/cshaped_mounting_bracket.pdf`\n- All nominal dimensions are in millimetres.\n- Interpret every view and section together. Include every shown feature.\n- Use sharp edges unless the drawing explicitly specifies a fillet or chamfer.\n\n## Available software\n- FreeCAD 1.1.3 desktop application: `FreeCAD`\n- FreeCAD 1.1.3 command line: `FreeCADCmd`\n- CadQuery 2.8.0 with cadquery-ocp 7.9.3.1.1: `cadquery-python`\n- Poppler PDF tools such as `pdftoppm`, `pdfimages`, and `pdftotext`\n\nYou may use the desktop GUI, Python/CadQuery, FreeCAD scripting, or any\ncombination of installed tools. Inspect the drawing carefully before modeling.\n\n## Required deliverable\nSave exactly one valid, closed solid as:\n`/media/user/data/agenthle/engineering/cshaped_mounting_bracket_construction/base/output/cshaped_mounting_bracket.step`\n\nThe file must be a self-contained ISO-10303-21 STEP file between 1 KiB and\n25 MiB. The model may use any origin and any proper rotation. Do not reflect,\nscale, stretch, or shear the part. Surface/face partitioning and STEP metadata\ndo not matter; the occupied three-dimensional geometry does.\n\nThe hidden reference model is not present while you work. Do not attempt to\nlocate evaluator or reference files. Complete the task autonomously and verify\nthat the final STEP imports as exactly one valid solid before finishing.\n\nComplete this task fully autonomously. Do not ask the user questions. You may\nuse either GUI CAD operations or scripts. Resolve the engineering drawing\ncarefully. Before finishing, confirm that the required STEP file exists and\nimports as exactly one valid solid.",
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      "message": "You are a mechanical CAD engineer. Reconstruct the C-shaped mounting bracket\nshown in the dimensioned engineering drawing as an accurate three-dimensional solid.\n\n## Input\n- Engineering drawing (PDF): `/media/user/data/agenthle/engineering/cshaped_mounting_bracket_construction/base/input/cshaped_mounting_bracket.pdf`\n- All nominal dimensions are in millimetres.\n- Interpret every view and section together. Include every shown feature.\n- Use sharp edges unless the drawing explicitly specifies a fillet or chamfer.\n\n## Available software\n- FreeCAD 1.1.3 desktop application: `FreeCAD`\n- FreeCAD 1.1.3 command line: `FreeCADCmd`\n- CadQuery 2.8.0 with cadquery-ocp 7.9.3.1.1: `cadquery-python`\n- Poppler PDF tools such as `pdftoppm`, `pdfimages`, and `pdftotext`\n\nYou may use the desktop GUI, Python/CadQuery, FreeCAD scripting, or any\ncombination of installed tools. Inspect the drawing carefully before modeling.\n\n## Required deliverable\nSave exactly one valid, closed solid as:\n`/media/user/data/agenthle/engineering/cshaped_mounting_bracket_construction/base/output/cshaped_mounting_bracket.step`\n\nThe file must be a self-contained ISO-10303-21 STEP file between 1 KiB and\n25 MiB. The model may use any origin and any proper rotation. Do not reflect,\nscale, stretch, or shear the part. Surface/face partitioning and STEP metadata\ndo not matter; the occupied three-dimensional geometry does.\n\nThe hidden reference model is not present while you work. Do not attempt to\nlocate evaluator or reference files. Complete the task autonomously and verify\nthat the final STEP imports as exactly one valid solid before finishing.\n\nComplete this task fully autonomously. Do not ask the user questions. You may\nuse either GUI CAD operations or scripts. Resolve the engineering drawing\ncarefully. Before finishing, confirm that the required STEP file exists and\nimports as exactly one valid solid.",
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