# Mastery and Review Policy

Track evidence states instead of a single percentage:

`unseen → recognized → reconstructed → applied_with_support → applied_independently → transferred → retained → graduated`

An episode may advance a capability by at most one state. Critical rubric failure blocks advancement. No-hint application in a changed context is required for `transferred`; a delayed parallel-form success is required for `retained`. Later counterevidence may lower or mark a state unstable.

Schedule short-, medium-, and long-delay retrieval through the host scheduler. Change the surface form instead of repeating an answer. Prioritize overdue review, real-project needs, blocking prerequisites, repeated high-confidence errors, unverified promotions, missing transfer, cognitive load, and task-type interleaving—in that order. Record why a task was chosen.
