Skip to main content
📜 WAYPOINT LESSON

Checkpoint: The JSONL Journal

⭐⭐⭐ advanced⏳ 28 min read📍 Lesson 160 of 180

Append-only history, torn-tail tolerance, and atomic rotation.

Checkpoint: the JSONL journal

Append events, rotate by size, replay deterministically, and survive a truncated tail — the exact contract of every production log before it was a product.