CLAUDE.md and AGENTS.md checker

Paste your two instruction files. The page tells you which one Claude Code reads, whether CLAUDE.md imports AGENTS.md, how long the files are and which lines appear in both. It runs in your browser and sends nothing anywhere.

CLAUDE.md (leave empty if you have none)AGENTS.md (leave empty if you have none)

What the checks are based on

Claude Code reads AGENTS.md as project instructions only when there is no CLAUDE.md in the working directory or above it (version 2.1.277 or later).
When both files exist and CLAUDE.md does not import AGENTS.md, Claude reads only the CLAUDE.md files.
A line such as @AGENTS.md in CLAUDE.md imports the file. Imports inside code spans and fenced code blocks are skipped.
The documentation targets under 200 lines per CLAUDE.md file.

Source: Claude Code documentation, how Claude remembers your project, read 2026-10-31. This tool follows that page. It does not run Claude Code, so check the result in a real session. More: AGENTS.md and CLAUDE.md.