If You're Building with LLMs, You Should Have Thought About Observability from Day One

Introduction "AI did something. But I have no idea what it actually did." — Before that happens to you, observability is something you really need to think about upfront. When you develop using AI coding tools like Claude Code or Cursor, you can see "it works." But "why it worked," "where and how it made decisions," and "whether the implementation matches my intent" become much harder to see. The same goes when you use AI in your product itself — whether that's calling LLM APIs, building AI agen