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

src/imessage/monitor/inbound-processing.test.ts

@@ -0,0 +1,60 @@
+import { describe, expect, it, vi } from "vitest";
+import type { OpenClawConfig } from "../../config/config.js";
+import {
+  describeIMessageEchoDropLog,
+  resolveIMessageInboundDecision,
+} from "./inbound-processing.js";
+
+describe("resolveIMessageInboundDecision echo detection", () => {
+  const cfg = {} as OpenClawConfig;
+
+  it("drops inbound messages when outbound message id matches echo cache", () => {
+    const echoHas = vi.fn((_scope: string, lookup: { text?: string; messageId?: string }) => {
+      return lookup.messageId === "42";
+    });
+
+    const decision = resolveIMessageInboundDecision({
+      cfg,
+      accountId: "default",
+      message: {
+        id: 42,
+        sender: "+15555550123",
+        text: "Reasoning:\n_step_",
+        is_from_me: false,
+        is_group: false,
+      },
+      opts: undefined,
+      messageText: "Reasoning:\n_step_",
+      bodyText: "Reasoning:\n_step_",
+      allowFrom: [],
+      groupAllowFrom: [],
+      groupPolicy: "open",
+      dmPolicy: "open",
+      storeAllowFrom: [],
+      historyLimit: 0,
+      groupHistories: new Map(),
+      echoCache: { has: echoHas },
+      logVerbose: undefined,
+    });
+
+    expect(decision).toEqual({ kind: "drop", reason: "echo" });
+    expect(echoHas).toHaveBeenCalledWith(
+      "default:imessage:+15555550123",
+      expect.objectContaining({
+        text: "Reasoning:\n_step_",
+        messageId: "42",
+      }),
+    );
+  });
+});
+
+describe("describeIMessageEchoDropLog", () => {
+  it("includes message id when available", () => {
+    expect(
+      describeIMessageEchoDropLog({
+        messageText: "Reasoning:\n_step_",
+        messageId: "abc-123",
+      }),
+    ).toContain("id=abc-123");
+  });
+});