Open-source rules engine for Cursor IDE — 110 rules, agents, skills, commands that give AI permanent memory of your standards. Demo: 30%+ token savings, blocks hardcoded secrets, type-check instead of 100K-token test runs, consistent code across team.

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Complete documentation for Cursor AI code editor. Learn to use AI features like Composer and Chat, master installation, settings, and updates. The most comprehensive guide for coding with AI assistance.