@startuml MCP Sequence Diagram

participant McpClient
participant McpSyncClient
participant McpAsyncClient
participant DefaultMcpTransport
participant StdioServerTransport

== Initialization ==

McpClient -> McpSyncClient: new McpSyncClient(transport)
activate McpSyncClient

McpSyncClient -> McpAsyncClient: new McpAsyncClient(transport)
activate McpAsyncClient

McpAsyncClient -> DefaultMcpTransport: start()
activate DefaultMcpTransport
DefaultMcpTransport --> McpAsyncClient: started
deactivate DefaultMcpTransport

McpAsyncClient --> McpSyncClient: created
deactivate McpAsyncClient

McpSyncClient --> McpClient: created
deactivate McpSyncClient

== Message Flow ==

McpClient -> McpSyncClient: initialize()
activate McpSyncClient

McpSyncClient -> McpAsyncClient: initialize()
activate McpAsyncClient

McpAsyncClient -> DefaultMcpTransport: sendMessage(initRequest)
activate DefaultMcpTransport

DefaultMcpTransport -> StdioServerTransport: sendMessage(initRequest)
activate StdioServerTransport

StdioServerTransport --> DefaultMcpTransport: response
deactivate StdioServerTransport

DefaultMcpTransport --> McpAsyncClient: InitializeResult
deactivate DefaultMcpTransport

McpAsyncClient --> McpSyncClient: InitializeResult
deactivate McpAsyncClient

McpSyncClient --> McpClient: InitializeResult
deactivate McpSyncClient

== Tool Execution ==

McpClient -> McpSyncClient: callTool(name, args)
activate McpSyncClient

McpSyncClient -> McpAsyncClient: callTool(name, args)
activate McpAsyncClient

McpAsyncClient -> DefaultMcpTransport: sendMessage(toolRequest)
activate DefaultMcpTransport

DefaultMcpTransport -> StdioServerTransport: sendMessage(toolRequest)
activate StdioServerTransport

StdioServerTransport --> DefaultMcpTransport: response
deactivate StdioServerTransport

DefaultMcpTransport --> McpAsyncClient: CallToolResult
deactivate DefaultMcpTransport

McpAsyncClient --> McpSyncClient: CallToolResult
deactivate McpAsyncClient

McpSyncClient --> McpClient: CallToolResult
deactivate McpSyncClient

== Cleanup ==

McpClient -> McpSyncClient: close()
activate McpSyncClient

McpSyncClient -> McpAsyncClient: close()
activate McpAsyncClient

McpAsyncClient -> DefaultMcpTransport: close()
activate DefaultMcpTransport

DefaultMcpTransport -> StdioServerTransport: close()
activate StdioServerTransport
StdioServerTransport --> DefaultMcpTransport: closed
deactivate StdioServerTransport

DefaultMcpTransport --> McpAsyncClient: closed
deactivate DefaultMcpTransport

McpAsyncClient --> McpSyncClient: closed
deactivate McpAsyncClient

McpSyncClient --> McpClient: closed
deactivate McpSyncClient

@enduml