claude_design connector / /design-login not available

Claude Code injects an instruction telling me to ensure the claude_design MCP connector (https://api.anthropic.com/v1/design/mcp) is connected, and to run /design-login if it needs authorization. However, none of the pieces to act on that instruction exist:

• There is no /design-login slash command in the CLI (claude --help shows no design reference).
• The claude_design connector is not provisioned out of the box.
• Adding it manually with claude mcp add --transport http claude_design https://api.anthropic.com/v1/design/mcp results in "Failed to connect" (not "needs authentication"), so no OAuth flow can be triggered.

The instruction appears to ship ahead of the feature being enabled for the account, leaving no way to act on it.

Steps to reproduce

1. Observe the injected instruction referencing claude_design and /design-login.
2. Run /design-login -> command does not exist.
3. Run claude mcp add --transport http claude_design https://api.anthropic.com/v1/design/mcp.
4. Run claude mcp list -> claude_design ... Failed to connect.

Environment

• Claude Code: 2.1.176
• OS: macOS (Darwin 25.3.0)

Expected

Either the connector + /design-login are available, or the instruction is not injected until the feature is enabled for the account.