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>;

  /// Return a path that programs should use as their initial current working
  /// directory, interpreting `.` as shorthand for this.
  initial-cwd: func() -> option<string>;
}