[Bug] mcp-registry connector persists with invalid server ID format in Claude Desktop

Bug Description

Bug: Persistent mcp-registry Connector in Claude Desktop (macOS)

Description

In the latest Claude Desktop on macOS, an mcp-registry connector appears in the Connectors UI and cannot be removed. Attempts to uninstall it result in:

Invalid server ID format. Expected UUID or mcpsrv_* tagged ID.
Failed to disconnect from server

This connector persists even after:

• Deleting all local Claude Desktop config, caches, and containers
• Fully uninstalling and reinstalling Claude Desktop
• Quitting all MCP servers and related tools (e.g., Windsurf, Playwright MCP)
• Resetting local state

It appears to be coming from Claude Desktop’s embedded tooling but is incorrectly presented in the UI as a removable connector.

Steps to Reproduce

1. Install the latest Claude Desktop on macOS.
2. Open Connectors in the app.
3. Observe that mcp-registry is listed.
4. Attempt to uninstall it — the UI produces a validation error.
5. Reset local data and relaunch — the connector still appears.

Expected Behavior

Built-in or system MCP servers should either:

• Not appear as removable connectors, or
• Appear with a valid ID that the UI can manage.

Actual Behavior

mcp-registry appears as a removable connector with an invalid server ID and cannot be uninstalled through the UI.

Environment

• Claude Desktop version: 1.1.381 (c2a39e)
• macOS version: 26.3 Beta (25D5101c)
• Deleted configuration and reinstalled both Claude Desktop and Claude Code multiple times

Relevant Logs

Audit logs show entries such as:

"mcp_servers":[
  {"name":"weather","status":"connected"},
  {"name":"Claude in Chrome","status":"connected"},
  {"name":"mcp-registry","status":"connected"},
  …
]

Notes

This appears to be a UI/validation issue where an internal MCP server (mcp-registry) is being exposed as a connector with an invalid ID format, causing uninstall to fail.

Environment Info

• Platform: darwin
• Terminal: WarpTerminal
• Version: 2.1.12
• Feedback ID: 8b899170-e8f4-4578-80e2-92cb87e79f46

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