MCP server authentication error messages have been rewritten to be more specific and actionable:
- Old: "Authentication successful, but server still requires authentication. You may need to manually restart Claude Code."
- New: "Tried reconnecting, but <name> is still unauthorized. Make sure the browser sign-in completed, then try again from /mcp."
- Old: "Authentication successful, but server reconnection failed."
- New: "Tried reconnecting to <name>, but the connection failed. Restart Claude Code to retry."
Evidence
Improved error messages (search for "Tried reconnecting, but", "Tried reconnecting to")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.