Also try the free AGENTS.md / CLAUDE.md token counter.
Practical notes on keeping agent instruction files lean and loadable.
How long should CLAUDE.md / AGENTS.md be? Vendor line/size guidance, why bloat gets ignored, and a trim checklist. AGENTS.md example: sections that belong (and ones that don’t) A short skeleton of what to keep always-on vs move into skills/docs. Why Cursor is ignoring your rules (.mdc + frontmatter) Extension, frontmatter, globs, and alwaysApply — the load checklist. CLAUDE.md vs AGENTS.md vs Cursor rules One source of truth across Claude Code, Cursor, and Codex without duplicate tokens.