509 end-to-end, single-display Windows CAD task recordings across seven CAD software families. - taskdesc.json - task prompt, application, reference-input paths, and expected deliverables - inputfiles/ - reference inputs named input.ext or inputN.ext - outputfiles/ - submitted CAD deliverables and supplemental outputs named output.ext or outputN.ext - rubrics.json - task-specific evaluation criteria - taskoverview.pdf - review document combining the task, rubrics, and current visual references - clip.mp4 - screen recording video - frameevents.json - events synchronized to video frames - metadata.json - duration, frame, event, category, and platform metadata - narration.json - frame-level…