When a session accesses the Design MCP connector (/v1/design/ paths), Claude Code now automatically requests the required user:design:read and user:design:write OAuth scopes if not already present. A one-time notification is shown when the scopes are added:
Added user:design:read and user:design:write to your claude.ai login (for the Design MCP connector).
Evidence
New EWd() function — search for "Added user:design:read and user:design:write to your claude.ai login"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.