Per-chapter spaced-repetition. Pick a chapter you're studying right now, practice its concepts only. Builds on Daily Practice's FSRS pool — same algorithm, narrower scope.
Pick a chapter
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Practice: —
Tip: Card state is shared with Daily Practice — same FSRS pool, same review history. Mastery toggles also feed Skill Mastery Map.
All review state stays in your browser (`nexus_fsrs_v1`, `nexus_fsrs_history_v1`). Switching browsers wipes progress unless you export from Daily Practice first.