5 CLAUDE.md Patterns That Make AI Actually Follow Your Rules

Have you ever set up a CLAUDE.md file, dropped in 200 lines of rules, and then watched the AI completely ignore half of them anyway?

You are not alone. The irony of writing instructions for AI coding assistants is that the same productivity trap applies to you: more rules ≠ better results.

Here are five patterns that actually work, learned from managing production CLAUDE.md setups across a dozen project starters.

1. The 800-token rule

The biggest CLAUDE.md mistake is treating it like documentation. It is not documentation. It is a system prompt prefix — and system prompts have a working memory budget.