THE COMPLETE GUIDE TO CLAUDE.MD

Summary from the TLDR Dev newsletter

CLAUDE.md files are markdown files that Claude automatically reads at the start of each coding session to understand project-specific instructions, conventions, and workflows. They need to be maintained over time to avoid repeating setup instructions in every conversation. Other features include importing other files with `@imports`, using modular rule files in `.claude/rules/` directories, and placing CLAUDE.md files in subdirectories for more complex project structures.