diff --git a/docs/terminal-activity.md b/docs/terminal-activity.md
index 42826e5f49..ee1f411a7a 100644
--- a/docs/terminal-activity.md
+++ b/docs/terminal-activity.md
@@ -51,7 +51,7 @@ Claude hook mapping:
 
 - `UserPromptSubmit` → `running`
 - `Stop`, `StopFailure`, `SessionEnd` → `idle`
-- `Notification` with `reason` or `matcher` equal to `idle_prompt` → `needs-input`
+- `Notification` with `notification_type` equal to `idle_prompt` → `needs-input`
 
 Claude does not run `Stop` when the user interrupts a turn. A standalone Ctrl-C or Escape input
 while terminal activity is working clears the activity without finished attention. The same
diff --git a/packages/cli/src/commands/hooks.test.ts b/packages/cli/src/commands/hooks.test.ts
index 3f8c31d855..dd99816b06 100644
--- a/packages/cli/src/commands/hooks.test.ts
+++ b/packages/cli/src/commands/hooks.test.ts
@@ -17,6 +17,15 @@ function inputFrom(value: string) {
   };
 }
 
+function claudeNotification(notificationType: string) {
+  return JSON.stringify({
+    session_id: "session-1",
+    hook_event_name: "Notification",
+    message: "Claude is waiting for your input",
+    notification_type: notificationType,
+  });
+}
+
 function ttyInput() {
   return {
     isTTY: true,
@@ -123,7 +132,7 @@ describe("runHooksCommand", () => {
     const send = await runHook(
       claudeProvider.id,
       claudeProvider.events[4].event,
-      inputFrom('{"reason":"idle_prompt"}'),
+      inputFrom(claudeNotification("idle_prompt")),
     );
 
     expectPostedState(send, "needs-input");
@@ -131,11 +140,11 @@ describe("runHooksCommand", () => {
 
   it.each(["permission_prompt", "elicitation_prompt", "elicitation_response", "auth_success"])(
     "ignores Claude %s notifications",
-    async (reason) => {
+    async (notificationType) => {
       const send = await runHook(
         claudeProvider.id,
         claudeProvider.events[4].event,
-        inputFrom(JSON.stringify({ reason })),
+        inputFrom(claudeNotification(notificationType)),
       );
 
       expect(send.calls).toEqual([]);
diff --git a/packages/server/src/terminal/agent-hooks/claude/claude.ts b/packages/server/src/terminal/agent-hooks/claude/claude.ts
index 35bfa9eca5..82ddcf770d 100644
--- a/packages/server/src/terminal/agent-hooks/claude/claude.ts
+++ b/packages/server/src/terminal/agent-hooks/claude/claude.ts
@@ -40,8 +40,8 @@ function isIdlePrompt(raw: string | null): boolean {
   try {
     const notification = JSON.parse(raw) as unknown;
     if (!notification || typeof notification !== "object") return false;
-    const payload = notification as { matcher?: unknown; reason?: unknown };
-    return payload.matcher === "idle_prompt" || payload.reason === "idle_prompt";
+    const payload = notification as { notification_type?: unknown };
+    return payload.notification_type === "idle_prompt";
   } catch {
     return false;
   }