diff --git a/.agents/skills/multi-agent-mux-create/scripts/create_session.sh b/.agents/skills/multi-agent-mux-create/scripts/create_session.sh
index 02b37c2..2096b37 100755
--- a/.agents/skills/multi-agent-mux-create/scripts/create_session.sh
+++ b/.agents/skills/multi-agent-mux-create/scripts/create_session.sh
@@ -315,7 +315,8 @@ if [ -n "$DELEGATE_JOB_ID" ]; then
   echo "delegate job: $DELEGATE_JOB_ID"
   
   # Construct instructions matching multi-agent-mux-delegate-job format
-  pub="python3 .agents/skills/multi-agent-mux-delegate-job/scripts/publish_event.py --job $DELEGATE_JOB_ID"
+  py_bin="$(_delegate_py_bin)"
+  pub="$py_bin .agents/skills/multi-agent-mux-delegate-job/scripts/publish_event.py --job $DELEGATE_JOB_ID"
   instructions="Your job_id is \"$DELEGATE_JOB_ID\" (the one just registered for THIS delegation).
 
 On start run:        $pub --event started.