-record(chat, {
    client :: starlet:client(any()),
    model :: binary(),
    system_prompt :: gleam@option:option(binary()),
    messages :: list(starlet:message()),
    tools :: list(starlet@tool:definition()),
    temperature :: gleam@option:option(float()),
    max_tokens :: gleam@option:option(integer()),
    ext :: any(),
    json_schema :: gleam@option:option(gleam@json:json()),
    timeout_ms :: integer()
}).