diff --git a/plugins/notify-hooks/README.md b/plugins/notify-hooks/README.md
index 9a5e95a..c77efbc 100644
--- a/plugins/notify-hooks/README.md
+++ b/plugins/notify-hooks/README.md
@@ -6,7 +6,7 @@ Desktop sound notifications for ECA events — never miss when ECA finishes or n
 
 Two hooks that play system sounds:
 
-- **`notify-finished`** — Plays a completion sound when ECA finishes responding (postRequest).
+- **`notify-finished`** — Plays a completion sound when the primary ECA chat finishes responding (postRequest). Subagent completions are ignored when ECA provides `parent_chat_id`.
 - **`notify-approval`** — Plays a notification sound when ECA needs tool call approval (preToolCall).
 
 ## Platform support
@@ -18,6 +18,6 @@ Two hooks that play system sounds:
 
 - **Linux:** `sudo apt install libcanberra-gtk3-module` (Debian/Ubuntu) or equivalent
 - **macOS:** No additional setup needed
-- **`jq`** must be installed for the approval notification filter
+- **`jq`** must be installed for notification filters
 
 Credits: Based on the config shared by @ericdallo.
diff --git a/plugins/notify-hooks/hooks/hooks.json b/plugins/notify-hooks/hooks/hooks.json
index bc6d875..6fa466d 100644
--- a/plugins/notify-hooks/hooks/hooks.json
+++ b/plugins/notify-hooks/hooks/hooks.json
@@ -5,7 +5,7 @@
     "actions": [
       {
         "type": "shell",
-        "shell": "jq -e '.hook_type == \"postRequest\"' > /dev/null && (canberra-gtk-play -i complete 2>/dev/null || afplay /System/Library/Sounds/Glass.aiff 2>/dev/null || true)"
+        "shell": "jq -e 'has(\"parent_chat_id\") | not' > /dev/null && (canberra-gtk-play -i complete 2>/dev/null || afplay /System/Library/Sounds/Glass.aiff 2>/dev/null || true)"
       }
     ]
   },