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Shareable instruction files for Cursor, Claude Code, Copilot, Windsurf, and more — installed alongside your existing agent rules.
In each source file, maintain the up-to-date `this_file` record that shows the path of the current file relative to project root. Place the `this_file` record near the top of the file, as a comment after the shebangs, or in the YAML Markdown frontmatter.