What problem does it solve? Manually figuring out how to start a project's dev server, which port it binds to, and how to open it in the right browser interrupts the flow of reviewing and polishing a feature branch. This Skill automates that setup so you can go straight from a branch or PR to a running, browsable feature and iterate on improvements conversationally. ## Core Features & Use Cases - Automatic dev-server startup: Reads .claude/launch.json when present, or auto-detects the project type (Rails, Next.js, Vite, Nuxt, Astro, Remix, SvelteKit, Procfile) including monorepo layouts, then resolves the package manager and port. - IDE-aware browser handoff: Detects Claude Code, Cursor, or VS Code via environment variables and opens the running feature in the appropriate browser mechanism. - Conversational iteration loop: You browse the feature, describe what feels off, and fixes are applied with hot-reload until you are done, at which point changes are committed. - Use Case: You check out a colleague's PR branch, invoke the skill, and within seconds the Next.js app is running on port 3000 in your browser; you say "the header spacing feels cramped" and the fix lands immediately. ## Quick Start Ask the AI to polish the current branch or a specific PR number so it starts the dev server and opens the feature in a browser for review.