Use this skill whenever a task touches FSRS, spaced repetition, review scheduling, retrievability, stability, difficulty, implicit metrics, par time, Ghost Grader, or drill review submission in PANaCEa. It protects repo-specific scheduler rules and prevents incorrect four-button FSRS assumptions.
Read these first when the task touches scheduler logic:
AGENTS.mdlib/fsrs.tslib/implicit-metrics.tshooks/useDrillFSRS.tslib/services/drillReviewService.tsAgain / GoodHard / Easy UIAgain = 1Hard = 2Good = 3Easy = 4MAIN and DRILL flows should update FSRSgrade_continuous is 1.0-4.0retrievability is 0.0-1.0stability is in days