diff --git a/artifacts/api-server/tests/executive-meetings-row-color.test.mjs b/artifacts/api-server/tests/executive-meetings-row-color.test.mjs
index 485e597f..a0fdb793 100644
--- a/artifacts/api-server/tests/executive-meetings-row-color.test.mjs
+++ b/artifacts/api-server/tests/executive-meetings-row-color.test.mjs
@@ -19,6 +19,7 @@
 import { test, before, after } from "node:test";
 import assert from "node:assert/strict";
 import pg from "pg";
+import { io as ioClient } from "socket.io-client";
 
 const API_BASE = process.env.TEST_API_BASE ?? "http://localhost:8080";
 const DATABASE_URL = process.env.DATABASE_URL;
@@ -306,6 +307,68 @@ test("PATCH rowColor: non-mutate viewer role gets 403 and the row colour is unch
   );
 });
 
+test("PATCH rowColor: the realtime executive_meetings_changed event fires for the affected date so other tabs / devices know to re-fetch", async () => {
+  // This is the contract that makes "shared" actually feel realtime —
+  // without it, a second viewer would only see the colour change after
+  // they manually refreshed. The frontend listens for this exact event
+  // (see use-notifications-socket.ts) and invalidates the day query.
+  const meeting = await createMeeting(
+    "RowColor socket",
+    "بث اللون عبر السوكيت",
+  );
+
+  const events = [];
+  const socket = ioClient(API_BASE, {
+    path: "/api/socket.io",
+    transports: ["websocket"],
+    forceNew: true,
+    reconnection: false,
+    extraHeaders: { Cookie: adminCookie },
+  });
+  await new Promise((resolve, reject) => {
+    socket.on("executive_meetings_changed", (payload) => {
+      events.push(payload);
+    });
+    socket.on("connect", resolve);
+    socket.on("connect_error", reject);
+  });
+
+  try {
+    const res = await api(
+      adminCookie,
+      "PATCH",
+      `/api/executive-meetings/${meeting.id}`,
+      { rowColor: "gray" },
+    );
+    assert.equal(res.status, 200);
+
+    // Give the broadcast a moment to land. 400ms is plenty for a
+    // localhost socket and well under the test timeout.
+    const start = Date.now();
+    while (events.length === 0 && Date.now() - start < 400) {
+      await new Promise((r) => setTimeout(r, 25));
+    }
+    assert.ok(
+      events.length > 0,
+      "executive_meetings_changed should fire after a rowColor PATCH",
+    );
+    // Some payloads also include an array of dates; we just need the
+    // current day to be addressed in any of them.
+    const sawToday = events.some((p) => {
+      if (!p) return false;
+      if (typeof p.date === "string" && p.date === today) return true;
+      if (Array.isArray(p.dates) && p.dates.includes(today)) return true;
+      return false;
+    });
+    assert.ok(
+      sawToday,
+      `event should reference today's date (${today}); got ${JSON.stringify(events)}`,
+    );
+  } finally {
+    socket.disconnect();
+  }
+});
+
 test("PATCH rowColor: each successful change writes an audit row attributed to the acting user", async () => {
   const meeting = await createMeeting("RowColor audit", "سجل لون الصف");