Brief, mostly signal
Reddit user cuts a 400-line CLAUDE.md to 80 lines
Build, test and directory notes stay in the root file, and domain rules move into subdirectory CLAUDE.md files. The user asks for production-tested patterns.
What the research found
A Reddit user cut a 400-plus-line root CLAUDE.md to about 80 lines of build, test and directory notes and moved domain rules into subdirectory CLAUDE.md files, asking others for production-tested patterns; this is anecdotal practice, not a product change.
Claims and how well the evidence supports them
- Trimming a root CLAUDE.md to about 80 lines and moving domain rules into subdirectory CLAUDE.md files reduced token use 85%
- A root CLAUDE.md grew past 400 lines and the agent ignored half the instructions 98%
Evidence
- reddit.com https://reddit.com/r/ClaudeAI/comments/1xalih0/for_those_running_claude_code_on_large_monorepos
Actionability rated medium.