old_contents: import Start from 'start';
  import reporter from 'start-pretty-reporter';
  import env from 'start-env';
  import files from 'start-files';
  import watch from 'start-watch';
  import clean from 'start-clean';
  import read from 'start-read';
  import babel from 'start-babel';
  import write from 'start-write';
  import eslint from 'start-eslint';
  import mocha from 'start-mocha';
  import * as istanbul from 'start-istanbul';
  import codecov from 'start-codecov';
  
  import babelIstanbul from 'babel-istanbul';
  
  export const start = Start(reporter());
  
  export function build() {
      return start(
          env('production'),
          files('build/'),
          clean(),
          files('lib/**/*.js'),
          read(),
          babel(),
          write('build/')
      );
  }
  
  export function dev() {
      return start(
          env('development'),
          files('build/'),
          clean(),
          files('lib/**/*.js'),
          watch(file => start(
              files(file),
              read(),
              babel(),
              write('build/')
          ))
      );
  }
  
  export function lint() {
      return start(
          env('test'),
          files([ 'lib/**/*.js', 'test/lib/**/*.js' ]),
          eslint()
      );
  }
  
  export function test() {
      return start(
          env('test'),
          files('test/lib/**/*.js'),
          mocha()
      );
  }
  
  export function tdd() {
      return start(
          files([ 'lib/**/*.js', 'test/**/*.js' ]),
          watch(test)
      );
  }
  
  export function coverage() {
      return start(
          env('test'),
          files('coverage/'),
          clean(),
          files('lib/**/*.js'),
          istanbul.instrument(babelIstanbul),
          test,
          istanbul.report([ 'lcovonly', 'html', 'text-summary' ])
      );
  }
  
  export function ci() {
      return start(
          lint,
          coverage,
          files('coverage/lcov.info'),
          read(),
          codecov()
      );
  }
  
  export function prepush() {
      return start(
          lint,
          coverage
      );
  }
  
new_contents: import Start from 'start';
  import reporter from 'start-pretty-reporter';
  import env from 'start-env';
  import files from 'start-files';
  import watch from 'start-watch';
  import clean from 'start-clean';
  import read from 'start-read';
  import babel from 'start-babel';
  import write from 'start-write';
  import eslint from 'start-eslint';
  import mocha from 'start-mocha';
  import * as istanbul from 'start-istanbul';
  import codecov from 'start-codecov';
  
  import babelIstanbul from 'babel-istanbul';
  
  export const start = Start(reporter());
  
  export function build() {
      return start(
          env('production'),
          files('build/'),
          clean(),
          files('lib/**/*.js'),
          read(),
          babel(),
          write('build/')
      );
  }
  
  export function dev() {
      return start(
          env('development'),
          files('build/'),
          clean(),
          files('lib/**/*.js'),
          watch(file => start(
              files(file),
              read(),
              babel(),
              write('build/')
          ))
      );
  }
  
  export function lint() {
      return start(
          env('test'),
          files([ 'lib/**/*.js', 'test/lib/**/*.js' ], { ignore: 'test/fixtures/**' }),
          eslint()
      );
  }
  
  export function test() {
      return start(
          env('test'),
          files('test/**/*.js', { ignore: 'test/fixtures/**' }),
          mocha()
      );
  }
  
  export function tdd() {
      return start(
          files([ 'lib/**/*.js', 'test/**/*.js' ]),
          watch(test)
      );
  }
  
  export function coverage() {
      return start(
          env('test'),
          files('coverage/'),
          clean(),
          files('lib/**/*.js'),
          istanbul.instrument(babelIstanbul),
          test,
          istanbul.report([ 'lcovonly', 'html', 'text-summary' ])
      );
  }
  
  export function ci() {
      return start(
          lint,
          coverage,
          files('coverage/lcov.info'),
          read(),
          codecov()
      );
  }
  
  export function prepush() {
      return start(
          lint,
          coverage
      );
  }
  
subject: include all tests except `test/fixtures/**`