@type t() :: %Codex.ModelSettings{
  extra_body: map(),
  extra_headers: map(),
  extra_query: map(),
  frequency_penalty: number() | nil,
  max_tokens: pos_integer() | nil,
  metadata: map() | nil,
  parallel_tool_calls: boolean() | nil,
  presence_penalty: number() | nil,
  prompt_cache: term() | nil,
  provider: :responses | :chat,
  reasoning: term() | nil,
  response_include: term() | nil,
  store: term() | nil,
  temperature: number() | nil,
  tool_choice: term() | nil,
  top_logprobs: term() | nil,
  top_p: number() | nil,
  truncation: term() | nil
}