# Haystack Changelog

Recent updates and improvements to Haystack.

## February 2026

### Feb 12 - Cloud Sandbox and In-Review Editing
- Pro users can now preview frontend and backend changes in a cloud sandbox
- Edit code directly in the review and see live results

### Feb 11 - Documentation Page
- Added a /docs page with step-by-step verification flow setup guide
- Learn how to set up automated PR verification with /prepare-haystack and /setup-haystack

### Feb 5 - Mobile Support
- Haystack now works on mobile devices with a fully responsive design
- Floating chat input and swipeable Code/Browser/Terminal tabs for easy navigation
- Long-press on any symbol for go-to-definition on touch devices

### Feb 1 - Slash Commands & Dashboard Improvements
- New slash commands: /approve, /merge, /comment, and /request-changes to take action directly from chat
- Quick approve and merge buttons added to the dashboard for faster PR workflows
- Stacked PR navigator for Graphite and ghstack-style PR stacks
- Collapsible dashboard sections and ability to dismiss PRs you don't need to review

## January 2026

### Jan 31 - React File Chunking Fix
- Fixed chunking of React files so components are properly grouped in PR sections

### Jan 29 - Agent-First UI and Bug Detection
- Redesigned the UI to prioritize Haystack Agent — the agent is now front and center in your review workflow
- Made chat a lot faster, especially suggestion pills which now load and respond near-instantly
- Haystack now automatically detects possible bugs and issues in your PR so you can catch problems before they ship

### Jan 23 - Edit Code Right in Your Review
- Make changes and run them in one click — no local setup required
- Pro subscribers get cloud sandboxes with full frontend/backend preview

### Jan 15 - Haystack Agent
- Chat with an AI that understands your entire PR context
- Ask questions about the code, get explanations, and request changes

## Links

- [Home](/) - Learn more about Haystack
- [Pricing](/pricing) - Plans and pricing