//! Protocol layer for MCP communication
//!
//! This module provides:
//! - JSON-RPC 2.0 message types and parsing
//! - MCP-specific message types (initialize, tools, resources, prompts)
//! - Connection state machine for lifecycle management
// Protocol types used by client module, will be used in M1
// Re-export commonly used types
pub use ;
pub use ;
pub use ;