Haystack helps engineering teams manage the growing volume of AI-generated pull requests. It sits on top of GitHub, analyzes each PR’s diff, codebase context, agent trace, intent, and verification evidence, then routes it: safe to move forward, needs fixes, or needs human review. Teams use Haystack to keep code moving without rubber-stamping, focusing human attention where judgment actually matters.

Haystack re-imagines the IDE by putting it on a 2D digital whiteboard that automatically draws connections between code as you navigate and edit files. We designed it to match our mental model of how code works together – as a graph of connected components.

Haystack is the fastest path from pull request to merge. It makes PRs read like a story: changes unfold in order, data flows are traced end-to-end, and caller contexts are surfaced. Even complex code feels simple to review in Haystack!

Haystack analyzes and organizes the changes in a pull request and guides you through them in a logical sequence on an interactive canvas. Haystack enables you to spend time on the stuff that matters, like providing feedback or internalizing changes.

Haystack is a a canvas-based IDE that automates the boring stuff (plumbing, refactoring, and finding code) so that you can focus on the exciting parts! You can see a quick overview of Haystack at !