[BUG] Shared Claude Code artifact returns 404 for a viewer with explicit access

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Shared Claude Code artifact returns 404 for a viewer with explicit access

Artifact ID: 50af1325-d6fa-48ea-9087-67e127f71516

Sharing state: viewer added explicitly with "Viewer" role;
General access = "Everyone in Paragon-software / Can view"; Shared version = Latest.

28.08.2026 , microsoft edge \ yandex browser

What Should Happen?

Expected: viewer opens https://claude.ai/code/artifact/<id> and sees the artifact.
Actual: "Page not found" (404).

Error Messages/Logs

Steps to Reproduce

Steps: owner shares -> viewer opens link while logged in as the invited account -> 404.
Also checked: correct account confirmed in Settings; artifact not listed under
claude.ai/code/artifacts -> Shared.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.37937.3 (28dcf5) 2026-08-26T19:52:45.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_