Implements the subset of MCP 2025-11 we need. JSON-RPC 2.0 envelopes,
tool/resource/prompt shapes, progress notifications, and the cancellation
helpers. We deliberately avoid any and keep the types narrow so the
tool implementations get strong type-checking out of the box.
Model Context Protocol (MCP) wire types.
Implements the subset of MCP 2025-11 we need. JSON-RPC 2.0 envelopes, tool/resource/prompt shapes, progress notifications, and the cancellation helpers. We deliberately avoid
anyand keep the types narrow so the tool implementations get strong type-checking out of the box.