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Dated figures from our own collection of AI agent instruction files on public GitHub: how often SKILL.md, AGENTS.md and CLAUDE.md files change, how many copies fall behind, and what our automatic checks find. Each edition says how it was measured and includes its data. Shorter studies built on the same collection are on the blog.
State of agent markdown, September 2026
In the registry's corpus, roughly one in five agent markdown files changed within two weeks of being indexed. Of 47,724 files watched for at least 14 days, at least 9,487 (19.9%) received a new upstream commit within 14 days and at least 6,745 (14.1%) within 7. Without the ten most active repositories of each kind, the 14 day share is at least 17.8%.