adapters-application.js

// adapters/application.js
var ApplicationAdapter = DS.Adapter.extend({

  init: function() {
    this.hoodie = window.hoodie; // FIXME?
    this._super();
  },

  find: function(store, type, id) {
    return this.hoodie.store.find(type.typeKey, id);
  },

  findAll: function(store, type, since) {
    return this.hoodie.store.findAll(type.typeKey);
  },

  createRecord: function(store, type, record) {
    return this.hoodie.store.add(type.typeKey, record.toJSON());
  },

  updateRecord: function(store, type, record) {
    return this.hoodie.store.update(type.typeKey, record.get('id'), record.toJSON());
  },

  deleteRecord: function(store, type, record) {
    return this.hoodie.store.remove(type.typeKey, record.get('id'));
  }
});

export default ApplicationAdapter;

serializers-application.js

// serializers/application.js
var ApplicationSerializer = DS.JSONSerializer.extend({
  primaryKey: '_id'
});

export default ApplicationSerializer;

Are we done yet?
TODO: How to use embedded records?