> ## Documentation Index
> Fetch the complete documentation index at: https://developers.redo.com/llms.txt
> Use this file to discover all available pages before exploring further.
# CalendarAgendaOperationInput
> One change to an event's agenda. Set exactly one of `add`, `update`, or `remove`.
CalendarAgendaItemInput}>
Append a new item to the end of the agenda.
CalendarPromotionAgendaItemInput}>
A PROMOTION item.
What is discounted, for whom, and any code shoppers should use, written the way the Commerce Agent should read it; the agent may repeat it to shoppers. Required when adding a promotion. At most 2000 characters.
CalendarAgendaItemRemoveInput}>
Remove an existing item. A promotion Redo found on the brand's homepage returns DETECTED\_PROMOTION\_NOT\_REMOVABLE, since Redo would add it again; delete the event to dismiss it.
The agenda item's `id`.
CalendarAgendaItemUpdateInput}>
Change fields on an existing item.
The agenda item's `id`.
CalendarAgendaItemInput!} required>
The fields to change, under the item's own kind key. Omitted fields are unchanged. A different kind returns AGENDA\_ITEM\_KIND\_MISMATCH.
CalendarPromotionAgendaItemInput}>
A PROMOTION item.
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