Ergonomic code review in the age of AI.
With 10× the code generation capacity, code review becomes a bottleneck. GitHub's diff view wasn't built for this. You need tools that are a joy to use – and that integrate with agentic workflows.
Organize PRs the way you think about your project. Get AI-powered explanations for unfamiliar code. Start reviewing with a single command.
Files grouped by purpose – backend, tests, infrastructure – not just alphabetically. Your PR, organized the way you think.
Point critical at any GitHub PR and start reviewing. No context switching, no waiting.
Let the agent walk you through a diff – highlighting any surprises.
Run critical alongside your coding agent. Supervise changes in real time, intervene with targeted feedback, and trigger actions – all from one UI.
Watch your agent work in real time. As files change, the diff updates instantly.
Leave feedback on any line. Trigger an agent to act on your instructions directly from the review UI.
Turn an AI explanation into a source code comment with just one click.
critical today comes with skills to "explain a diff" or "investigate code smells", and can integrate your skills too!
One config file tailors the review experience to your codebase.
Define categories, editor integration, and more in a simple YAML file.
Run AI-powered review actions from the UI – explain diffs, promote explanations to code comments, and more.
Click on a line in the diff to open it in your IDE – VS Code, IntelliJ IDEA, or any editor with URL scheme support.
Here's what's on the horizon.
Register custom visualizations per file type – schema diffs, migration risk scores, API surface summaries. Your review, your way.
Define domain-specific review actions for your team. Custom skills live alongside your code and appear in the skill picker automatically.
critical will automatically determine the right project configuration based on the files in the diff. No human selection necessary.
Install critical, point it at a PR, and start reviewing – it takes less than a minute.
Open source (AGPL) · Works with Git repositories · macOS & Linux today (Windows tomorrow)