Add AI agent detection via @vercel/agent-readability

[molebox]

Summary

• Adds @vercel/agent-readability package for AI agent detection in middleware
• Detected agents get markdown responses instead of HTML for better AI consumption
• Non-existent docs URLs return helpful not-found markdown with discovery links
• Accept header content negotiation continues to work as before

Matches the geistdocs template (vercel/geistdocs#58). Uses the same shared package as vercel/front#65649.

Test plan

• AI agent hitting a valid docs URL gets markdown rewrite
• AI agent hitting a non-existent docs URL gets not-found markdown
• Normal browser requests unaffected
• Build passes

🤖 Generated with Claude Code

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
ai-elements	Error	Open in v0	Apr 2, 2026 11:07am

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​vercel/​agent-readability@​0.2.1

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