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📜 WAYPOINT LESSON

Checkpoint: Persistence

⭐ beginner⏳ 15 min read📍 Lesson 47 of 204

One graded challenge: a save/load round-trip that must reproduce data exactly.

Checkpoint — persistence. Pass the graded challenge below to finish the module.

The graded tests cannot see files (grading runs code, not I/O) — so they grade the round-trip logic through strings: serialize items to the CSV text, parse text back to items, and require equality. Same skill, hermetic testing.