code: function(msg, flags) {
      if (flags.exact) {
        seneca.add(_.extend({}, msg, { role: 'entity', cmd: 'save' }), save)
        seneca.add(_.extend({}, msg, { role: 'entity', cmd: 'load' }), load)
        seneca.add(_.extend({}, msg, { role: 'entity', cmd: 'list' }), list)
        seneca.add(_.extend({}, msg, { role: 'entity', cmd: 'remove' }), remove)
        return
      }
  
      var actions = {
        save: save,
        load: load,
        list: list,
        remove: remove
      }
  
      var core_patterns = [
        { role: 'entity', cmd: 'save' },
        { role: 'entity', cmd: 'load' },
        { role: 'entity', cmd: 'list' },
        { role: 'entity', cmd: 'remove' }
      ]
  
      _.each(core_patterns, function(core_pat) {
        var pats = seneca.list(core_pat)
        _.each(pats, function(pat) {
          seneca.add(pat, actions[core_pat.cmd])
        })
      })
    }
docs: Register cache interface