Migrating Redux reducers to Rematch reducers

Rematch models contain a state property, a reducers property, and an effects property. We can use state to add the initial state, and inside reducers, we can move our Redux reducers directly to the reducers' model property:

const INITAL_STATE = {
  todos: []
}
function reducer(state = INITAL_STATE, action) {
  switch(action.type) {
    case "ADD_TODO": {
      const newTodo = {
        id: Date.now(),
        title: action.title,
        completed: false,
      }
      return {
        ...state,
        todos: [...state.todos, newTodo]
      }
    ...