fix: harden iMessage echo dedupe and reasoning suppression (#25897)

src/agents/pi-embedded-subscribe.tools.extract.test.ts

@@ -35,4 +35,16 @@ describe("extractMessagingToolSend", () => {
     expect(result?.provider).toBe("slack");
     expect(result?.to).toBe("channel:C1");
   });
+
+  it("accepts target alias when to is omitted", () => {
+    const result = extractMessagingToolSend("message", {
+      action: "send",
+      channel: "telegram",
+      target: "123",
+    });
+
+    expect(result?.tool).toBe("message");
+    expect(result?.provider).toBe("telegram");
+    expect(result?.to).toBe("telegram:123");
+  });
 });

src/agents/pi-embedded-subscribe.tools.ts

@@ -298,7 +298,12 @@ export function extractMessagingToolSend(
     if (action !== "send" && action !== "thread-reply") {
       return undefined;
     }
-    const toRaw = typeof args.to === "string" ? args.to : undefined;
+    const toRaw =
+      typeof args.to === "string"
+        ? args.to
+        : typeof args.target === "string"
+          ? args.target
+          : undefined;
     if (!toRaw) {
       return undefined;
     }