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Proxee is a macOS app that mirrors a local web development server to an iPhone for live mobile preview, scroll sync, and page navigation while you build.
Bugpilot is a Chrome extension that captures console, network, DOM, and user action context as structured Markdown for AI coding assistants.
Patchrooms is a visual feedback tool for AI-built app previews. Review, annotate, or leave voice notes on live staging builds and export discussion as agent-ready Markdown for Claude Code and Cursor.
Backplanes Spotlight automatically turns completed Claude Code and Codex sessions into reports showing what an AI agent did, what it touched, and what may need review.
browse.sh is an open catalog of browser automation skills and a CLI for AI agents to control websites, inspect sessions, and use local or cloud browser workflows.
FixtureKit is a browser-based tool for generating fixtures, mocks, and test data from TypeScript and Zod schemas. It runs locally in the browser with no API calls, keeping schemas on your machine.
FlintLab is an AI-powered device infrastructure platform for testing on real and virtual devices, with CI/CD automation and UI, CLI, and API access.
Humans Not Invited is a machine interface for challenge tasks that fetches structured scenes and submits tile IDs via API, built for automated systems.
TestSprite is an AI testing agent and automation platform for generating, running, debugging, and refining UI, API, and end-to-end tests with minimal manual input.
Chunk sidecars is a lightweight microVM validation environment from CircleCI that helps AI coding agents catch build and test failures locally before CI.
The Incident Challenge is a bi-weekly production incident challenge where you debug under pressure and compare results on a leaderboard.
UI Design Analyzer is a free online tool that scores UI and UX screenshots on spacing, alignment, hierarchy, typography, and color—no login required.
MCP Server Health Check is a browser-based tool that tests an MCP endpoint’s JSON-RPC handshake, tool discovery, and authentication handling before AI client connection.
FixMyCWV audits Core Web Vitals, identifies LCP, INP, and CLS issues, and delivers code-level fixes for developers and teams.
Area Contrast Checker is a Chrome extension that samples rendered pixels from a selected area to check contrast on images, gradients, overlays, and more.
Polarity is sandboxed eval infrastructure for AI agents, built to test long-running workflows with real services, reproduce failures locally, and measure non-determinism.
Vibeocus Lens is a Chrome extension that captures DOM snippets, CSS selectors, visual state, and notes to turn frontend issues into structured context.
Screen Ruler Chrome extension for inspecting web pages, measuring elements and distances, copying computed CSS, sampling colors, and checking accessibility and SEO metadata.
Drizz is a vision AI mobile app testing platform for iOS and Android. Write tests in plain English, run on real devices, and reduce selector-based maintenance.
Tophat lets teams install and test mobile apps from CI artifacts with one click, share builds, route to the right device or simulator, and extend workflows.