@type phase() :: :started | :allowed | :vetoed

@type t() :: %Minga.Events.AgentHookEvent{
  event: String.t(),
  exit_status: non_neg_integer() | nil,
  phase: phase(),
  reason: term(),
  tool_call_id: String.t() | nil,
  tool_name: String.t() | nil,
  tool_pattern: String.t() | nil
}