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gen_mcp

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A generic MCP server behaviour for the latest protocol version with a suite of components to build tools, resources and prompts.

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gen_mcp lib gen_mcp.ex
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lib/gen_mcp.ex 

defmodule GenMCP do

  alias GenMCP.MCP

  alias GenMCP.Mux.Channel



  def supported_protocol_versions do

    ["2025-06-18"]

  end



  require(Elixir.GenMCP.MCP.ModMap).require_all()



  @type state :: term



  @callback init(session_id :: String.t(), term) :: {:ok, state} | {:stop, term}



  @type request :: MCP.InitializeRequest.t()

  @type result :: MCP.InitializeResult.t()

  @type notification :: MCP.InitializedNotification.t()

  @type server_reply :: {:result, result} | :stream | {:error, term}



  @callback handle_request(request, Channel.chan_info(), state) ::

              {:reply, server_reply, state} | {:stop, reason :: term, server_reply, state}

  @callback handle_notification(notification, state) :: {:noreply, state}

  @callback handle_info(term, state) :: {:noreply, state}

end