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"id": "task209",
"domain": "engineering",
"instruction": "Examine freecad_task-9_input.step in FreeCAD. Launch FreeCAD from `freecad` and open `freecad_task-9_input.step` there. Use the Part Design workbench for the modeling operations; activate or create the relevant Body, create new sketches for sketch-based features, and use feature or placement tools for the requested edits. Add three triangular reinforcing ribs on the top face of the base and fuse them to the base. Each rib is a right-triangular prism, 6 mm thick along Y, 30 mm high, and 24 mm long at the base. The rib center X positions are 35, 70, and 105 mm, the rib mid-plane is Y=15 mm, and the rib bottom touches Z=8 mm. Export /home/user/Desktop/freecad_task-9_output.step. The complete exported B-rep must match the specified geometry, including all cavities and unchanged regions. Feature names and modeling order may differ; merely matching bounding boxes, volume or selected cylinder radii is insufficient.\n\n## Delivery contract\n\n### Required files in the guest\n\nSave/export every file below at its exact absolute path, including filename and extension. All listed files are required; one format does not replace another.\n\n- `/home/user/Desktop/freecad_task-9_output.step` — STEP export of the requested final geometry.\n\nComplete all save/export dialogs and wait for the operation to finish before submitting. A filename in the answer, an open save dialog, or an unsaved application view does not submit a file. Use the permitted GUI to check that the requested outputs were saved.\n\n### Final answer\n\nNo separate JSON or written scientific report is required. The requested measurements, tables and plots belong in the saved native artifacts specified above. Use the available completion tool after saving and inspecting the final GUI observation (for a runner exposing finish, use finish(status=\"done\")). A brief completion message is optional and does not replace the files.\n",
"deliverables": [
"/home/user/Desktop/freecad_task-9_output.step"
],
"instruction_images": [],
"task_version": 3
}
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