interface environment {
  /// Get the POSIX-style environment variables.
  ///
  /// Each environment variable is provided as a pair of string variable names
  /// and string value.
  ///
  /// Morally, these are a value import, but until value imports are available
  /// in the component model, this import function should return the same
  /// values each time it is called.
  get-environment: func() -> list<tuple<string, string>>

  /// Get the POSIX-style arguments to the program.
  get-arguments: func() -> list<string>
}