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star adds Gmail’s STARRED system label to one or many messages. Use it to surface important mail in Gmail’s Starred view or flag mail for a person.

Example

Star newly received messages from a VIP sender:

Inputs

Every input field also accepts a compatible Signal; the example passes the filtered message ID signal directly.

Output

The action returns a Signal<string[]> containing the modified message IDs in input order. The action applies Gmail’s STARRED label to individual messages. It does not select among the visual star styles configured in Gmail.