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📜 WAYPOINT LESSON

Checkpoint: The Bounded TTL Cache

⭐⭐⭐ advanced⏳ 30 min read📍 Lesson 152 of 180

Time, size, and weak keys — three mechanisms, three failures, one cache.

Checkpoint: the complete TTL cache

Time expiry, size eviction, weak-key release — three mechanisms, each answering a different failure. Plus retention: your cache reports its own metadata through a runtime annotation, closing the loop with Module 7.