What
claude mcp add connects Claude Code to an MCP server, an outside program that gives Claude extra tools. Its -H, --header option sets headers, extra pieces of information sent with each request, for HTTP and SSE servers. The help text for that option now says to repeat the flag for more headers, and its example shows one header instead of two.
Why
Only the wording of the help changed. The option works as before.
Names in the bundleclaude mcp add--header