We’re excited to share Haystack Code Reviewer, a tool that analyzes, chunks, and organizes the changes made in a pull request and guides you through them in a logical sequence on an interactive canvas. We hope that Haystack really cuts down on the time that you spend piecing together what's happening in the pull request, so that you can spend time on the parts that matter, like providing feedback or internalizing the changes.

As software engineers who’ve dreaded code reviews and always put them off as much as possible, we noticed how much time we spent poring over diffs to understand the broader picture or narrative of a pull request before even evaluating the code itself. Haystack Code Reviewer is designed to assemble that jigsaw puzzle for you, making code reviews less of a chore and more of a learning opportunity for both the reviewer and author!

To play with demo code reviews, go to https://haystackeditor.com/playground and select a pull request of your choice. If you’re interested in learning more, feel free to check out our short demo video at https://youtu.be/K_qLwXFwr8I. Or if you’re ready to try it out, head over to https://haystackeditor.dev and:

1. Optionally sign in (necessary if you want to review a pull request for a private repository). For public repositories, no sign-in is needed

2. Load any PR via URL or from the dropdown (for example, try https://github.com/microsoft/vscode/pull/238427)

3. When prompted for AI analysis, click “Yes” to enable automatic organization and sectioning (we send only the diffs in the pull request to OpenAI).

We hope you find Haystack Code Reviewer useful. Let us know what you think!

You might have seen our previous Show HN at https://news.ycombinator.com/item?id=42935218. We have now completely redesigned it to work with a guided AI tour of exactly how you should review the pull request so that you don't have to even think about how to approach a code review!