Cline's code-review agent turns review into a closed loop from changed code to findings, fixes, tests, and re-checks.
The implementation matters because it is built on the same repository-aware loop used for coding rather than a detached text classifier. The agent can inspect project tools, report concrete findings, and revisit the change after the developer or another agent applies a fix.
The reusable pattern is evidence-producing review. A production version should bind each finding to code, record which checks ran, and distinguish a resolved issue from a stopped worker. The value is not more comments; it is a shorter path to a verified change.