close.onCommentUpdated starts an automation when a Close comment body changes or a user removes the comment. Close reports user removal as an update with data.body set to null; permanent deletion during comment-thread cleanup uses close.onCommentDeleted instead.
automations/on-close-comment-updated.automation.ts
account selects a named binding. Returns the Close event envelope with the current comment snapshot in data and previous changed values in previousData. data.body is null for a removed comment.