Devin Review: an independent reviewer on every PR

Code review is the most important quality gate in your process, and the hardest for humans to do well at scale. Devin Review is an AI reviewer on every PR, and three things make it different: it runs your code (it can build, compile, even drive a browser to test the change end to end), it's a separate system from sessions (so reviewing a Devin-authored PR is a genuine second opinion), and it reads the whole codebase, not just the diff, so it catches logic flaws and cross-file issues other tools miss.

What reviewing feels like: start at the Findings Summary, where issues are already ranked by severity: Severe (usually fix before merging) and Non-severe (still worth a look). Use Read Explanation on each file for a plain summary of what changed and why, and hit Mark as Viewed to track progress on big PRs. When you're done, Finish Update.

When you find a real issue, you have four moves: Prompt for Agents gives you a ready-made prompt to paste into a session so the fix comes back as a commit; Copy Bug formats it for Linear, Jira, or Slack; Ask Devin lets you challenge the finding or request alternatives right in context; and Autofix (off until an admin enables it) can fix findings automatically as commits for review.

Security findings get their own section above ordinary bugs, each flagged inline at the exact line with a severity label, the vulnerability class, a CWE ID, and a narrative of the actual attack plus a recommended fix. Treat them as blocking by default. Because Review runs the code and sees the whole repo, it catches cross-file vulnerabilities that pattern-matching scanners miss, like a new endpoint that bypasses the auth middleware every other route uses.

Closing the loop: turn a recurring finding into Knowledge or a rule in AGENTS.md so the same class of bug stops reaching review at all. That is exactly what Cloud 102 is about. Next, run the whole loop yourself in the walkthrough.