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📜 WAYPOINT LESSON

Checkpoint: The Complete Mini-DI Container

⭐⭐⭐ advanced⏳ 30 min read📍 Lesson 148 of 180

Recursive injection, singletons, cycle diagnostics, and honest capability queries.

Checkpoint: the mini DI container, complete

Everything from the practice set plus one production-shaped rule: the container reports missing dependencies with a real exception instead of building half an object graph. After this checkpoint, reflection is no longer magic — it is a tool you have shipped.