refactor: harden run_loop.sh verdict parser, add atomic promotion, and revise multi_agent_workflow.md guidelines

.agents/skills/lib.sh

@@ -1168,6 +1168,10 @@ send_keys_safe() {
   _sks_tmux set-buffer -b "sks_$job_id" "$text"
   _sks_tmux paste-buffer -b "sks_$job_id" -t "$sess"
   _sks_tmux delete-buffer -b "sks_$job_id" 2>/dev/null || true
+  if [[ "$sess" =~ "agy" ]]; then
+    _sks_tmux send-keys -t "$sess" C-m
+    return 0
+  fi
   sleep 0.5
   local pane_content was_popup=0
   pane_content=$(_pane_capture "$sess")