Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.122 Home All releases olderv2.1.121 v2.1.123newer
Claude Code v2.1.122

Improved MCP Authentication Error Messages

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.

See this entry in the whole of v2.1.122 →