Communicate. Know the best way to reach someone before acting.. Use live presence and reachability signals before choosing how a message or action should continue.. Reachability. Reachability checks. Fallback to another channel. Delivery and escalation health. Voice. ONTRE. FORGE. EKO. Agents can use reachability as a decision signal instead of blindly retrying.. Presence is used within permitted workflows and recorded for operational traceability.