diff --git a/plugins/plugin-dev/skills/plugin-settings/SKILL.md b/plugins/plugin-dev/skills/plugin-settings/SKILL.md
index 912a06e1..3093a5d9 100644
--- a/plugins/plugin-dev/skills/plugin-settings/SKILL.md
+++ b/plugins/plugin-dev/skills/plugin-settings/SKILL.md
@@ -230,8 +230,8 @@ Read from hooks to coordinate agents:
 AGENT_NAME=$(echo "$FRONTMATTER" | grep '^agent_name:' | sed 's/agent_name: *//')
 COORDINATOR=$(echo "$FRONTMATTER" | grep '^coordinator_session:' | sed 's/coordinator_session: *//')
 
-# Send notification to coordinator
-tmux send-keys -t "$COORDINATOR" "Agent $AGENT_NAME completed task" Enter
+# Send notification to coordinator (use -L default to ensure correct socket)
+tmux -L default send-keys -t "$COORDINATOR" "Agent $AGENT_NAME completed task" Enter
 ```
 
 ### Pattern 3: Configuration-Driven Behavior
diff --git a/plugins/plugin-dev/skills/plugin-settings/references/real-world-examples.md b/plugins/plugin-dev/skills/plugin-settings/references/real-world-examples.md
index b62a9103..e4e3b43d 100644
--- a/plugins/plugin-dev/skills/plugin-settings/references/real-world-examples.md
+++ b/plugins/plugin-dev/skills/plugin-settings/references/real-world-examples.md
@@ -76,10 +76,10 @@ fi
 # Send notification to coordinator
 NOTIFICATION="🤖 Agent ${AGENT_NAME} (Task ${TASK_NUMBER}, PR #${PR_NUMBER}) is idle."
 
-if tmux has-session -t "$COORDINATOR_SESSION" 2>/dev/null; then
-  tmux send-keys -t "$COORDINATOR_SESSION" "$NOTIFICATION" Enter
+if tmux -L default has-session -t "$COORDINATOR_SESSION" 2>/dev/null; then
+  tmux -L default send-keys -t "$COORDINATOR_SESSION" "$NOTIFICATION" Enter
   sleep 0.5
-  tmux send-keys -t "$COORDINATOR_SESSION" Enter
+  tmux -L default send-keys -t "$COORDINATOR_SESSION" Enter
 fi
 
 exit 0