Publishing
Limits and troubleshooting
| File | A single self-contained .html, or a .zip with index.html and its images at the top level. |
|---|---|
| Size | Up to 5 MB, measured after the images are bundled in. A larger file is almost always large images: ask Claude to compress them, or use fewer. |
| Name | Becomes part of the prototype's address, so it must be unique. That name is already taken means another prototype uses it — choose a different one. |
It runs in a sandbox
An uploaded prototype runs apart from the hub. It cannot see your hub session, and browser storage — localStorage, sessionStorage, cookies — is not available to it. Keep its state in memory; the Claude prompt already asks for that.
A blank page, or a feature that silently does nothing? Check whether the prototype saves to browser storage. It works when you open the file on your computer and fails inside the sandbox.
Signed in to VeraGen? Press Guide me on any screen for a walkthrough, or ask Odin.