List (cart): the bot collects the customer's picks into one list

An ordinary variable holds one value and is overwritten by the next. A list gathers them one after another — like a cart the customer fills with buttons. At each step you choose what to do: add an item, remove it, or empty the list entirely. The customer just taps buttons while the bot keeps the set with them and can show it in the next message.

Action

What to do with the list: put an item in (add), remove one, or clear it completely. "Add" by default. For the "remove" action the bot deletes all matching items at once.

List variable

The name of the "cart" the chosen items are collected into — for example cart. Written in Latin letters, digits and _, and not starting with a digit.

What to add / remove

What exactly to put into the list or take out — plain text or a placeholder like the customer's reply {{user_input.text}}. Each addition is one item in the list. Up to 1024 characters. Hidden for the "clear" action.

Where to store the result

Remember the list for the customer permanently (it survives across chats) or only for the current run of the flow. Kept with the customer by default.

No duplicates (don't add twice)

Don't put the same thing in twice — a repeat pick is simply ignored. Off by default. Available only for the "add" action.

Maximum items (1–200)

How many items the list can hold at most — from 1 to 200, 50 by default. When the list is full nothing new is added, and the variable last_list_full becomes true. Available only for the "add" action.

The customer taps "cappuccino", "croissant" and "éclair", and the "List" block with the "add" action collects them into the cart variable. A "Remove" button deletes an item, "Checkout" leads on, and in the next message the bot shows the assembled cart.