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AI agent framework for Elixir with multi-provider LLM support

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nous lib nous memory entry.ex
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lib/nous/memory/entry.ex 

defmodule Nous.Memory.Entry do

  @moduledoc """

  Memory entry struct with scoping fields for flexible isolation.

  """



  @type memory_type :: :semantic | :episodic | :procedural



  @type t :: %__MODULE__{

          id: String.t(),

          content: String.t(),

          type: memory_type(),

          importance: float(),

          evergreen: boolean(),

          embedding: [float()] | nil,

          metadata: map(),

          access_count: non_neg_integer(),

          agent_id: String.t() | nil,

          session_id: String.t() | nil,

          user_id: String.t() | nil,

          namespace: String.t() | nil,

          created_at: DateTime.t(),

          updated_at: DateTime.t(),

          last_accessed_at: DateTime.t()

        }



  defstruct [

    :id,

    :content,

    :embedding,

    :agent_id,

    :session_id,

    :user_id,

    :namespace,

    type: :semantic,

    importance: 0.5,

    evergreen: false,

    metadata: %{},

    access_count: 0,

    created_at: nil,

    updated_at: nil,

    last_accessed_at: nil

  ]



  def new(attrs) when is_map(attrs) do

    now = DateTime.utc_now()

    id = Map.get(attrs, :id) || generate_id()



    %__MODULE__{

      id: id,

      content: Map.fetch!(attrs, :content),

      type: Map.get(attrs, :type, :semantic),

      importance: Map.get(attrs, :importance, 0.5),

      evergreen: Map.get(attrs, :evergreen, false),

      embedding: Map.get(attrs, :embedding),

      metadata: Map.get(attrs, :metadata, %{}),

      access_count: 0,

      agent_id: Map.get(attrs, :agent_id),

      session_id: Map.get(attrs, :session_id),

      user_id: Map.get(attrs, :user_id),

      namespace: Map.get(attrs, :namespace),

      created_at: Map.get(attrs, :created_at, now),

      updated_at: Map.get(attrs, :updated_at, now),

      last_accessed_at: Map.get(attrs, :last_accessed_at, now)

    }

  end



  defp generate_id do

    :crypto.strong_rand_bytes(16) |> Base.encode16(case: :lower)

  end

end