class Anthropic::FilePart

def initialize(content, filename: nil, content_type: nil)
  @content = content
  @filename =
    case content
    in Pathname
      filename.nil? ? content.basename.to_path : ::File.basename(filename)
    else
      filename.nil? ? nil : ::File.basename(filename)
    end
  @content_type = content_type
end