Close the implementation loop. Your agent edits code, screenshots localhost, compares the result, and iterates — without you touching the browser. Works with Claude Code, Cursor, Windsurf, Codex CLI, and any MCP client.
Your agent writes frontend code, screenshots localhost:3000 in a real Chrome with your auth cookies, compares against the design spec, and fixes issues — all without you alt-tabbing. The loop that used to take 10 minutes takes 30 seconds.
screenshot({ url: "http://localhost:3000/dashboard" })
On every PR, your agent screenshots the affected pages at mobile, tablet, and desktop breakpoints. It compares against the last known-good screenshots in KV store and flags pixel drift. No Chromatic subscription needed.
screenshot({ viewport: { width: 375, height: 812 } })
Your agent logs into staging with a persistent profile, navigates to the API explorer, and tests endpoints with real authentication. No mocking, no expired tokens, no "works in Postman but not in production."
navigate({ url: "https://staging.app.com/api-explorer" })
Your agent opens your project management tool in a persistent profile, reads the ticket details, acceptance criteria, and linked PRs. It feeds that context directly into the coding session. No more alt-tabbing to remember what you're building.
get_content({ selector: ".issue-body" })
Your agent navigates through acceptance criteria step by step — clicking buttons, filling forms, checking results. Each step gets a screenshot. The final report shows exactly what passed and what broke, with evidence.
click({ selector: "[data-testid='submit-order']" })