Fix: Bare CLI User-Agent receives the markdown twin

Web-audit fix skill for the markdown-cli-ua check (Content for agents, MAY).

Goal

Serve the markdown twin to shell HTTP clients that state no content-type preference.

Fix

Sniff the request User-Agent and serve the markdown twin to bare shell clients (curl, wget, and language HTTP libraries) that send Accept: */* or no Accept at all. A scripted curl https://your.site/ should get the raw markdown source, not the HTML shell, so pipelines parse content instead of scraping chrome. Return the same twin you already expose to Accept: text/markdown, keyed on the User-Agent this time.

Resources

• RFC 7763 (text/markdown)
• RFC 9110 (User-Agent)

Copy-paste prompt

Paste this into your coding agent. Your audit adds what it observed for this check:

Verify

Re-run the audit at https://anc.dev/audit or call the audit_website MCP tool; the markdown-cli-ua check should report pass.