Sending guardrails

Expert skeleton. The structure, the safety posture and the decision points are final. Every number and every playbook is TODO(expert) and must be validated by Reply's deliverability experts before this skill leaves draft. Visible gaps are deliberate; invented thresholds would be worse than none.

Purpose

Deliverability is an asset that burns in days and rebuilds over months. This skill encodes the constraints automated outreach must respect so it never damages the user's domain, and the moves to make when the signals start degrading.

When to use / when NOT to use