"Evaluation & Operations — If You Can't Measure It, You Can't Improve It (Harness Series 6/6)"
← Multi-Provider Routing — Which M… 📚 Series Index (series end) The closing piece . You've built context (Part 2), memory (Part 3), tools (Part 4), and routing (Part 5). How do you know it actually works ? You measure. What you can't measure, you can't improve. This article covers the Evaluation (quality measurement) and Operations (runtime management) layers — the system that continuously verifies every component covered in Parts 1~5. Series Roadmap (6 parts — final) What Is Harness Engineering? Context Engineering Memory Systems Tools & Sandboxing Multi-Provider Routing Evaluation & Operations ← this article (final) 1. Why Eval Is a Distinct Concern Different from Regular Software Unit-test pass ≠ user satisfaction Same input → different outputs (non-deterministic) "Correct answer" isn't always defined (creative writing, summarization, refactoring) A model swap shifts all behavior subtly Agents Need Continuous Verifi...