RHDH freeze announcements

Produce a Slack message a human posts under their own name. The counts come from the CLI; the voice must not sound machine-written.

Delivery boundary

Never post to Slack. This skill hands the user a message to copy; the user decides whether, when, and where it goes out.

Route

Load workflows/freeze-announcement.md. It maps the four announcements to their CLI tokens and carries the milestone-versus-update distinction, which is the thing people get wrong.

Boundary with the neighbouring skills