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hermes_mcp

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Model Context Protocol (MCP) implementation in Elixir with Phoenix integration

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hermes_mcp lib hermes transport behaviour.ex
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lib/hermes/transport/behaviour.ex 

defmodule Hermes.Transport.Behaviour do

  @moduledoc """

  Defines the behavior that all transport implementations must follow.

  """



  alias Hermes.MCP.Error



  @type t :: GenServer.server()

  @typedoc "The JSON-RPC message encoded"

  @type message :: String.t()

  @type reason :: term() | Error.t()



  @callback start_link(keyword()) :: GenServer.on_start()

  @callback send_message(t(), message()) :: :ok | {:error, reason()}

  @callback shutdown(t()) :: :ok | {:error, reason()}



  @doc """

  Returns the list of MCP protocol versions supported by this transport.



  ## Examples



      iex> MyTransport.supported_protocol_versions()

      ["2024-11-05", "2025-03-26"]

  """

  @callback supported_protocol_versions() :: [String.t()] | :all

end