Haystack Changelog

Recent updates and improvements to Haystack.

July 2026

Jul 5 - Built for Coding Agents

• Agent setup skill at /skill.md — a coding agent can install and configure Haystack on a repo end-to-end
• llms.txt and markdown for agent fetches — Claude, ChatGPT, and Perplexity agents get real content instead of an app shell
• CLI 0.15.14 — haystack init detects your dev server and names configs after the repo
• haystack-cli and haystack-review on npm now resolve to the real CLI

June 2026

Jun 28 - Sharper Analysis, Bigger PRs

• Blast-radius verdicts grounded in named callers and callsites
• Materiality filter drops nitpick findings before they reach you
• Huge PRs with generated files no longer stall analysis; 4× analysis capacity
• New home page built around risk-based QA: one risky change, caught, tested, escalated

Jun 22 - GitHub Access, Hardened

• Every GitHub read and write runs on GitHub App installation tokens — OAuth fallbacks removed
• Private-repo analysis results authorized by signed grants instead of live GitHub calls

May 2026

May 31 - The CLI Becomes a Platform

• haystack setup --repo owner/name --yes runs fully non-interactive; --json speaks NDJSON for coding agents
• MCP server (haystack mcp) exposes triage results and PR state to any MCP client
• Webhooks, headless tokens, and versioned JSON schemas for every --json output

May 20 - Onboarding That Survives Real Repos

• Protected default branch? Setup opens a bootstrap PR through the Git Data API — works with rulesets and CODEOWNERS
• Repo scans clone and search your code directly, replacing the GitHub Search API
• Extracted rules arrive in plain language with per-card toggles
• Existing open PRs are backfilled for analysis when your config PR merges

May 18 - Review Chat, Persistent and Polished

• Chat turns persist and survive reconnects
• Syntax-highlighted before/after diffs, themed code blocks and tables
• Resizable inbox/chat split; Drafts bucket with Undraft; live review-comment Threads tab

April 2026

Apr 12 - The Inbox & Feed

• Haystack now opens to the Inbox — a unified home for every PR that needs your attention
• The Feed surfaces one actionable PR at a time — Issues Found, Review Requested, Needs Assignment, and more
• Chat with any PR directly from a feed card
• Tabbed sections — Good to Merge, Snoozed, Analyzing, Recently Merged

Apr 8 - Auto-Fixer Agent (Alpha)

• Haystack can attempt to auto-fix straightforward issues in your PRs with a sandbox agent
• Smart dismissals remember what you've already reviewed

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 - Plans and pricing