GDD — Giggly-Dazzling-Duckling

AI-controlled browser farm on your machine
Simulate multiple real users across 22 device types — test your site like it's launch day.

How It Works

You: Open 3 iPhones and a desktop, navigate to myapp.com, test the signup form on all devices

Claude Code creates 4 browsers with device emulation, navigates each to your app, fills in the form, takes screenshots, checks console for errors — all in parallel.

gdd_add_players(3, device="iPhone 15 Pro")    → players [1, 2, 3]
gdd_add_players(1, device="Desktop 1080p")    → player  [4]
gdd_navigate(1, "https://myapp.com")          → all 4 browsers open your app
gdd_tap(1, "#signup-btn")                     → taps signup on iPhone
gdd_screenshot(1)                             → captures the result
gdd_get_console(1, level="error")             → checks for JS errors

GDD runs N isolated Chromium instances, each with its own profile, cookies, device emulation, geolocation, and network conditions. It exposes 37 MCP tools via HTTP on localhost:9700.

Install

GDD comes in two flavours. The Server is headless — it's just the MCP backend, runs anywhere (including boxes with no display), and is all you need for pure AI automation. The Desktop app adds a GUI: a live grid of browser thumbnails you can click into to take over a session by hand. The Server runs on port 9700, the Desktop app on 9800 — so you can run both side by side.

Server (headless) — the MCP backend:

... View full README on GitHub