Guide for writing and optimizing CLAUDE.md files for maximum Claude Code performance. Use when creating new CLAUDE.md, reviewing existing ones, or when user asks about CLAUDE.md best practices. Covers structure, content, pruning, and common mistakes.
- Major rewrite: skill focus changed from enforcing response optimization to guiding CLAUDE.md file writing. - Now provides concise best practices and anti-patterns for CLAUDE.md optimization. - Includes specific structural, formatting, and pruning advice. - Removes previous XML/output rules and step-by-step workflow details. - Adds checklists, practical examples, and clarifies what not to include.