What problem does it solve? CLAUDE.md is the only persistent context mechanism across Claude Code sessions, yet most projects either lack one or have bloated files that Claude ignores. This Skill creates optimized CLAUDE.md files from scratch or audits and fixes existing ones using context engineering principles compiled from 60+ sources. ## Core Features & Use Cases - Create Mode: Runs a short interview, explores the project (package.json, migrations, tsconfig), then generates a 50-80 line CLAUDE.md plus the full .claude/ structure (settings.json, rules with path-scoping, slash commands). - Improve Mode: Audits an existing CLAUDE.md against an 11-criteria quality scorecard, produces a diagnostic report with a 0-100 score, and applies fixes after approval. - Templates & Defaults: Ships templates for 7 project types (Next.js + Supabase, MCP server, design system, n8n, Express API, React Native, data pipelines) with a default stack assumption when unspecified. - Use Case: Your CLAUDE.md has grown to 350 lines and Claude ignores half the instructions. Run the audit mode to get a scored diagnosis and a refactored version under 80 lines with detail moved into .claude/rules/. ## Quick Start Ask the assistant to create or improve the CLAUDE.md for your project, mentioning your stack and any multi-tenancy or automation requirements.