Living Document Notice
Staged 2026-09-28. Living revisions and interconnected notes live in the Bosun PKM Garden.

Spaced Repetition Algorithms for Long-Term Retention

Default human memory decay curves rapidly erode unreinforced knowledge within days of initial acquisition. Implementing rigorous spaced repetition scheduling—such as modified SM-2 algorithms—transforms ephemeral study sessions into durable, permanent cognitive structures.

Repetition Invariants

  1. Interval Scaling: Review intervals expand exponentially based on user recall rating accuracy.
  2. Deterministic Scheduling: Due dates calculate locally without relying on cloud synchronization servers or telemetry tracking.
  3. Card Atomicity: Each learning card isolates a single discrete fact or conceptual invariant to prevent cognitive crowding.

Structured review loops ensure high-value technical and operational knowledge remains permanently accessible.


  • Directus Target: primer-blog
  • Garden Source Reference: MOC - Primer Education Engine, MOC - Fleet Operations, LOG-1001 - Append-Only Temporal Logs