old_contents: """App constants"""
  
  STUDENT_ROLE = 'student'
  GRADER_ROLE = 'grader'
  STAFF_ROLE = 'staff'
  INSTRUCTOR_ROLE = 'instructor'
  LAB_ASSISTANT_ROLE = 'lab assistant'
  ROLE_DISPLAY_NAMES = {
      STUDENT_ROLE: 'Student',
      GRADER_ROLE: 'Reader',
      STAFF_ROLE: 'Teaching Assistant',
      INSTRUCTOR_ROLE: 'Instructor',
      LAB_ASSISTANT_ROLE: 'Lab Assistant',
  }
  VALID_ROLES = [STUDENT_ROLE, LAB_ASSISTANT_ROLE, GRADER_ROLE, STAFF_ROLE,
                 INSTRUCTOR_ROLE]
  STAFF_ROLES = [GRADER_ROLE, STAFF_ROLE, INSTRUCTOR_ROLE]
  SCORE_KINDS = ['composition', 'correctness', 'total', 'partner a', 'partner b',
                 'regrade', 'revision', 'private', 'autograder']
  API_PREFIX = '/api'
  OAUTH_SCOPES = ['all', 'email']
  
  COMMON_LANGUAGES = ['python', 'java', 'c', 'scheme', 'lisp', 'javascript']
  
  COURSE_ENDPOINT_FORMAT = '^\w+/\w+/\w+$'
  ASSIGNMENT_ENDPOINT_FORMAT = COURSE_ENDPOINT_FORMAT[:-1] + '/\w+$'
  
  GRADES_BUCKET = 'ok_grades_bucket'
  TIMEZONE = 'America/Los_Angeles'
  ISO_DATETIME_FMT = '%Y-%m-%d %H:%M:%S'
  
  AUTOGRADER_URL = 'https://autograder.cs61a.org'
  
  FORBIDDEN_ROUTE_NAMES = [
      'about',
      'admin',
      'api',
      'comments',
      'login',
      'logout',
      'oauth',
      'rq',
      'testing-login',
  ]
  FORBIDDEN_ASSIGNMENT_NAMES = []
  
  # Maximum file size to show in browser, in bytes
  DIFF_SIZE_LIMIT = 256 * 1024  # 256KB
  
new_contents: """App constants"""
  
  STUDENT_ROLE = 'student'
  GRADER_ROLE = 'grader'
  STAFF_ROLE = 'staff'
  INSTRUCTOR_ROLE = 'instructor'
  LAB_ASSISTANT_ROLE = 'lab assistant'
  ROLE_DISPLAY_NAMES = {
      STUDENT_ROLE: 'Student',
      GRADER_ROLE: 'Reader',
      STAFF_ROLE: 'Teaching Assistant',
      INSTRUCTOR_ROLE: 'Instructor',
      LAB_ASSISTANT_ROLE: 'Lab Assistant',
  }
  VALID_ROLES = [STUDENT_ROLE, LAB_ASSISTANT_ROLE, GRADER_ROLE, STAFF_ROLE,
                 INSTRUCTOR_ROLE]
  STAFF_ROLES = [GRADER_ROLE, STAFF_ROLE, INSTRUCTOR_ROLE]
  SCORE_KINDS = ['composition', 'correctness', 'total', 'partner a', 'partner b',
                 'regrade', 'revision',
                 'checkpoint 1', 'checkpoint 2',
                 'private', 'autograder']
  API_PREFIX = '/api'
  OAUTH_SCOPES = ['all', 'email']
  
  COMMON_LANGUAGES = ['python', 'java', 'c', 'scheme', 'lisp', 'javascript']
  
  COURSE_ENDPOINT_FORMAT = '^\w+/\w+/\w+$'
  ASSIGNMENT_ENDPOINT_FORMAT = COURSE_ENDPOINT_FORMAT[:-1] + '/\w+$'
  
  GRADES_BUCKET = 'ok_grades_bucket'
  TIMEZONE = 'America/Los_Angeles'
  ISO_DATETIME_FMT = '%Y-%m-%d %H:%M:%S'
  
  AUTOGRADER_URL = 'https://autograder.cs61a.org'
  
  FORBIDDEN_ROUTE_NAMES = [
      'about',
      'admin',
      'api',
      'comments',
      'login',
      'logout',
      'oauth',
      'rq',
      'testing-login',
  ]
  FORBIDDEN_ASSIGNMENT_NAMES = []
  
  # Maximum file size to show in browser, in bytes
  DIFF_SIZE_LIMIT = 256 * 1024  # 256KB
  
subject: Add checkpoint score kinds