Route IPC send_message by paired room role

runners/agent-runner/src/ipc-message.ts

@@ -0,0 +1,22 @@
+export interface SendMessageIpcPayloadInput {
+  chatJid: string;
+  text: string;
+  sender?: string;
+  senderRole?: string;
+  groupFolder: string;
+  timestamp?: string;
+}
+
+export function buildSendMessageIpcPayload(
+  input: SendMessageIpcPayloadInput,
+): Record<string, string | undefined> {
+  return {
+    type: 'message',
+    chatJid: input.chatJid,
+    text: input.text,
+    sender: input.sender || undefined,
+    senderRole: input.senderRole || undefined,
+    groupFolder: input.groupFolder,
+    timestamp: input.timestamp || new Date().toISOString(),
+  };
+}