The new rules of context engineering for Claude 5 generation models
Summary
This article explains how Claude 5 generation models use context engineering by removing most of Claude Code's system prompt, and offers practical guidance to apply these principles to Claude Code and user-built agents. It covers shifting memory and guidance into CLAUDE.md, memories, and skills, opting for progressive disclosure and well-designed tool interfaces to improve model judgment. It also recaps the evolution from rule-based prompts to context-aware design and provides examples of how to structure system prompts, memories, and references.