Gmail claude.ai connector won't surface in CLI while Calendar/Drive (same account) work

Summary: Gmail claude.ai connector won't surface in Claude Code CLI, while Google Calendar and Google Drive (same account) work fine.

Environment: CLI v2.1.193, macOS, flag tengu_claudeai_mcp_connectors: true

Details:

• Gmail, Calendar, Drive all worked in the CLI through ~June 18 (UUID-named remote connector, gmailmcp.googleapis.com/mcp/v1).
• Gmail stopped working; Calendar & Drive also dropped, then recovered after reconnecting at claude.ai/customize/connectors. Gmail did NOT recover.
• Clean cycle attempted: revoked "Claude for Gmail" at myaccount.google.com/connections (removing one entry removed both duplicate entries), reconnected Gmail once on claude.ai, restarted the CLI. Gmail tools still absent.
• claude.ai shows Gmail with a "Disconnect" button (UI believes it's connected), but no Gmail tools load in the CLI and no grant exists on Google's side. Connector appears stuck/desynced, and Gmail-specific (Calendar/Drive on the same account work).
• Worked ~20 min ago and regressed mid-session — second connector regression in under a day.

Repro: In the CLI, no mcp__claude_ai_Gmail__* tools are available despite the connector showing enabled on claude.ai.