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lib/codex/session/memory.ex
defmodule Codex.Session.Memory do
@moduledoc """
In-memory session adapter backed by an Agent. Suitable for tests and short-lived runs.
"""
@behaviour Codex.Session
@doc """
Starts a new memory session agent.
"""
@spec start_link(keyword()) :: {:ok, pid()} | {:error, term()}
def start_link(opts \\ []) do
Agent.start_link(fn -> Keyword.get(opts, :history, []) end)
end
@impl true
def load(pid) when is_pid(pid) do
{:ok, Agent.get(pid, & &1)}
end
@impl true
def save(pid, entry) when is_pid(pid) do
Agent.update(pid, fn history -> history ++ [entry] end)
:ok
end
@impl true
def clear(pid) when is_pid(pid) do
Agent.update(pid, fn _ -> [] end)
:ok
end
end