Claude Code had been supporting SSE transport without requiring mcp-remote.

So I don't really understand what's new in this announcement.

Maybe what's actually new is streamable HTTP and OAuth?

https://github.com/anthropics/claude-code/blob/main/CHANGELO...

  1.0.27
  Streamable HTTP MCP servers are now supported
  Remote MCP servers (SSE and HTTP) now support OAuth
  MCP resources can now be @-mentioned