Switch to the stateless modern (>= 2026-07-28) protocol: no initialize
handshake; every request carries _meta (protocolVersion / clientInfo /
clientCapabilities) and the standard Mcp-Method / Mcp-Name /
MCP-Protocol-Version headers. Call discover() for up-front version
selection, or just issue requests.
Switch to the stateless modern (>= 2026-07-28) protocol: no initialize handshake; every request carries _meta (protocolVersion / clientInfo / clientCapabilities) and the standard Mcp-Method / Mcp-Name / MCP-Protocol-Version headers. Call discover() for up-front version selection, or just issue requests.