Send a message between BMAD agents using the messenger system {project-root}/_bmad/core/messenger/messenger-config.yaml {project-root}/_bmad-output/messenger/message-queue.yaml Load messenger config from {source} Validate type is one of: handoff, review, clarify, escalate, notify, collaborate Check required_fields for message type are present in payload HALT with validation error message Generate unique message_id: "MSG-{timestamp}-{random4}" Build message object: ```yaml message_id: "{message_id}" type: "{type}" from: "{from_agent}" to: "{to_agent}" or "{to_agents}" priority: "{priority}" created: "{timestamp}" status: "pending" payload: {payload} ``` Extract parent directory path from {queue_file} Create parent directory for {queue_file} if not exists (recursive) Load existing queue from {queue_file} (or create empty if not exists) Append new message to messages array Sort messages by priority (critical first) Save updated queue to {queue_file} Return message_id and status

Message sent successfully. ID: {message_id} Type: {type} From: {from_agent} To: {to_agent} Priority: {priority}