How do I drop a zip from an AI coding agent and review it visually with my team?

Open Vessel at usevessel.dev/app, drag the zip onto the canvas, and Vessel unpacks it and renders the prototype in a sandboxed browser iframe — no install, no build. Share the URL with the team; they inspect, comment, you dispatch the fix back to the agent. Supports Claude Code .zip, Claude Design .tar.gz, v0 / Bolt / Lovable exports, and URL handoffs.

Step by step

1. Open Vessel. Go to usevessel.dev/app. No signup.

2. Drop the zip. Drag it onto the upload zone, or click to pick a file. Up to ~10 MB / hundreds of files. Vessel unpacks, builds a source index, finds the entry point, renders it.

3. Share. The URL of the running prototype is shareable. (Sharing across machines requires either self-hosting or the planned hosted-collab feature — in browser-only mode the project lives in your tab.)

4. Inspect & comment. Your teammates click around in the rendered iframe, pin comment threads to elements, and resolve them.

5. Dispatch. When a thread is ready, one click bundles file path + code + thread + styles into a structured prompt to Claude Code (or your agent of choice).

What Vessel supports out of the box

Formats: .zip, .tar.gz, paste-a-URL handoff (the Claude Design / Anthropic API hash URL).

Code: TSX, JSX, MDX, plain HTML/CSS/JS. Common framework conventions: Next.js app router (file viewer mode for v1; WebContainer-live mode is dormant pending upstream fixes — see WebContainer notes), Vite, plain HTML bundles. Renders the prototype as a sandboxed iframe — your code runs in your browser.

Agents we've exercised: Claude Code, Claude Design, v0, Bolt.new, Lovable, Cursor, Replit Agent.

Privacy and security

Vessel is browser-only. Your project lives in the tab. Nothing is uploaded to a server unless you explicitly dispatch a prompt — and even then, only the prompt is sent (file path + selected code + thread + styles), not the rest of the project.