PR Lens by Coldtea.ai

PR Lens generates animated architecture and data-flow diagrams for a codebase and for individual pull requests, colour-coding additions, removals and modifications so a reviewer can see the shape of a change before reading a line of it. It runs three ways — as a GitHub Action, as a command-line tool, or as a coding-agent skill — and is published under the MIT licence, which makes it unusually easy to evaluate for a review-tooling category where most entrants are hosted and closed.