spaced-repetition
Creates spaced repetition schedules using the Leitner system or SM-2 algorithm for long-term memory retention. Produces a concrete review schedule with interval recommendations calibrated to the learner's material and available time -- not a description of how spaced repetition works. Use when a learner asks to create a review schedule, build a spaced repetition plan, optimize memorization, or set up a flashcard review system. Do NOT use for flashcard content creation (use `flashcard-generation`), for general study planning (use `study-plan`), or for exam-specific preparation (use `exam-prep-plan`).