# Anthropic’s Claude Certified Architect Exam (CCA-F): Everything Important Was in the Middle, So… > Source: > Published: 2026-07-27 06:13:02+00:00 Member-only story # Anthropic’s Claude Certified Architect Exam (CCA-F): Everything Important Was in the Middle, So Claude Forgot It. VI ## CCA-F Part 6: The smallest CCA-F domain by weight is the one that passers say surprised them most. Context management is a design problem, not a config knob, and how to manage what you resend so key facts never fall out *Your model nailed every fact in the demo, then dropped the one that mattered the moment the conversation got long. The fix is not a bigger window; it is rolling history, pinned facts, prompt caching, and two-stage retrieval so the detail you depend on never sinks into the middle and disappears.* In this article:you will learn why the Claude Messages API remembers nothing between calls, and what that forces your application to do on every turn. We cover the rolling window that keeps a long session fast and accurate, why summarizing harder destroys exactly the value you need, how to keep a precise fact alive outside the summary, and how to shape external context with two-stage retrieval and tool-output trimming. By the end, you will be able to spot the distractors the CCA-F builds out of each of these failures.