← LibraryBuilder · B2
The 200–500 line rule
Build-along · ~8 min at your own keyboard
Every CLAUDE.md line gets injected into every conversation. A 10K-token file taxes each session before you type. Keep it 200–500 lines, put the hardest guardrails at the very top (models remember beginnings and endings, not middles), and prune it like a stale listing.
Do this
0/4Share what happened
Paste your before/after line counts, the 3 rules you promoted to the top, and the /context delta.