Gallery of real AGENTS.md, CLAUDE.md and Cursor-rules files from flagship repos, browsable by stack, with a comparison hub whose adoption numbers are measured nightly rather than asserted.
On its own page, read 14 September 2026
repositories carry AGENTS.md. The median one runs words.
A gallery of real AGENTS.md, CLAUDE.md, Cursor, Copilot, Windsurf, GEMINI.md and Cline files, scraped from live repositories every night, classified by stack and scored. Capabilities are asserted; adoption is measured.
- That is 60.4% of the repositories RuleStack indexes. Share of indexed repositories carrying each format. One Cursor setup with thirty .mdc files is one adopting repository, not thirty.
- Always in scope; in a monorepo the nearest AGENTS.md to the edited file wins.
- capabilities are asserted by vendors, adoption is counted here nightly, and the two disagree more often than a capability table alone would suggest

