Exam-prep workspace for math/physics courses — 18 commands + 6 skills. Every course PDF routes through a parallel vision pipeline (faithful LaTeX, no pdfplumber word-salad). Hand-writing OCR is selectable per course: Claude native vision (default), local Qwen3-VL via Ollama, or Tesseract. Ships a per-course statusline (paideia · COURSE · D-N · phase · Pk ↑) auto-wired by init-course, /paideia:doctor for one-shot install + workspace diagnostics with permission-free --fix, and /paideia:alt to import an OPTIMETA Exam Radar export so lecture-emphasis exam signal folds in beside HW density.