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- They cover renames, participant additions and joins, departures while others remain, removals and admin transfers.
- They also record chat photo and Auto-Delete changes, enabling Temporary Chat, Universal Hashtag changes and eligible Scheduled Message creation or removal.
These messages update the chat-list preview and do not request an AI reply. You cannot edit or delete an activity message individually, although other available message actions still work.
Pinning or unpinning a chat is silent and does not change its preview. Muting and personal translation preferences do not add activity messages. Automatic title updates also stay silent.