Crontab

Crontab wraps cron core and maintains a persisted set of cron jobs. Crontab file is simply a JSON file (actually managed by jstore) which looks like this:

{"items":[
  ["1", {
    "at": "0 0 7 * * MON-FRI",
    "enable": true,
    "action": "foo",
    "payload": {"a": 1, "b": 2}
  }],
  ["2", {
    "at": "0 */2 1-4 * * *",
    "enable": true,
    "action": "bar"
  }]
]}

For the cron expression syntax, see cron core docs.