diff --git a/LifeOS/install/hooks/lib/notification-channel.test.ts b/LifeOS/install/hooks/lib/notification-channel.test.ts
new file mode 100644
index 0000000000..0c6ee9f012
--- /dev/null
+++ b/LifeOS/install/hooks/lib/notification-channel.test.ts
@@ -0,0 +1,62 @@
+/**
+ * notification-channel.test.ts — getNotificationChannel() must treat a Claude
+ * desktop-app session as 'desktop'. The app sets none of the TERM-family
+ * variables the sniff keys on, only CLAUDE_CODE_ENTRYPOINT=claude-desktop,
+ * so every voice-firing hook classified it 'headless' and skipped /notify.
+ * (public issue #1975)
+ *
+ *   bun test LifeOS/install/hooks/lib/notification-channel.test.ts
+ */
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import { getNotificationChannel } from "./notification-channel";
+
+const VARS = [
+  "LIFEOS_NOTIFICATION_CHANNEL",
+  "TERM",
+  "TERM_PROGRAM",
+  "KITTY_WINDOW_ID",
+  "SSH_TTY",
+  "CLAUDE_CODE_ENTRYPOINT",
+] as const;
+
+const saved: Partial<Record<(typeof VARS)[number], string | undefined>> = {};
+
+beforeEach(() => {
+  for (const k of VARS) {
+    saved[k] = process.env[k];
+    delete process.env[k];
+  }
+});
+
+afterEach(() => {
+  for (const k of VARS) {
+    if (saved[k] === undefined) delete process.env[k];
+    else process.env[k] = saved[k];
+  }
+});
+
+describe("getNotificationChannel", () => {
+  test("desktop app: entrypoint marker, no terminal identity → desktop", () => {
+    process.env.CLAUDE_CODE_ENTRYPOINT = "claude-desktop";
+    expect(getNotificationChannel()).toBe("desktop");
+  });
+
+  test("explicit LIFEOS_NOTIFICATION_CHANNEL still wins over the desktop marker", () => {
+    process.env.CLAUDE_CODE_ENTRYPOINT = "claude-desktop";
+    process.env.LIFEOS_NOTIFICATION_CHANNEL = "headless";
+    expect(getNotificationChannel()).toBe("headless");
+    process.env.LIFEOS_NOTIFICATION_CHANNEL = "imessage";
+    expect(getNotificationChannel()).toBe("imessage");
+  });
+
+  test("no terminal identity and no desktop marker → headless", () => {
+    expect(getNotificationChannel()).toBe("headless");
+    process.env.CLAUDE_CODE_ENTRYPOINT = "cli";
+    expect(getNotificationChannel()).toBe("headless");
+  });
+
+  test("terminal identity alone → desktop (unchanged)", () => {
+    process.env.TERM = "xterm-256color";
+    expect(getNotificationChannel()).toBe("desktop");
+  });
+});
diff --git a/LifeOS/install/hooks/lib/notification-channel.ts b/LifeOS/install/hooks/lib/notification-channel.ts
index 532b83abda..7b5a0f787e 100644
--- a/LifeOS/install/hooks/lib/notification-channel.ts
+++ b/LifeOS/install/hooks/lib/notification-channel.ts
@@ -35,6 +35,10 @@ const VOICE_LOG_PATH = paiPath('MEMORY', 'VOICE', 'voice-events.jsonl');
  *      carry only HOME+PATH; an interactive session always inherits TERM (kitty,
  *      Terminal.app, ssh). A session that was not spawned from a real terminal
  *      must never reach the speaker, no matter what the model inside it does.
+ *      The Claude desktop app is the one interactive surface with a speaker
+ *      and no terminal: it sets none of the TERM-family variables, only
+ *      CLAUDE_CODE_ENTRYPOINT=claude-desktop, so that marker counts as
+ *      terminal identity here (public issue #1975).
  *   3. Otherwise 'desktop' — terminal/main-session behavior is preserved.
  *
  * Spawner contract: every LifeOS tool that spawns `claude --print` also sets
@@ -46,7 +50,8 @@ export function getNotificationChannel(): NotificationChannel {
   const raw = process.env.LIFEOS_NOTIFICATION_CHANNEL;
   if (raw && raw.length > 0) return raw as NotificationChannel;
   const env = process.env;
-  if (!env.TERM && !env.TERM_PROGRAM && !env.KITTY_WINDOW_ID && !env.SSH_TTY) {
+  const desktopApp = env.CLAUDE_CODE_ENTRYPOINT === 'claude-desktop';
+  if (!env.TERM && !env.TERM_PROGRAM && !env.KITTY_WINDOW_ID && !env.SSH_TTY && !desktopApp) {
     return 'headless';
   }
   return 'desktop';