Find behavioral failures in live traffic
Identifies incorrect AI-agent behavior in production traffic, including errors that do not cause a crash.
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Coding / product dossier
three.dev
Finds AI-agent failures in live traffic, ranks severity, and gives coding agents context for fixes.
Product brief
What three.dev does.
Almost every team now runs AI in production, but few know how it behaves once real users show up. The failures are quiet: a wrong refund policy, a made-up order status. Nothing crashes, so you hear about it from your users. three.dev finds those failures in your live traffic on its own and ranks them by severity. Setup is one prompt to Claude Code, Cursor, or Codex. Then your coding agent gets what it needs to write the fix.