feat(o3): implement Invocation-Aware Scoped Guard for orchestrator role scoping (100% PASS)

.agents/skills/multi-agent-mux-loop/scripts/run_loop.sh

@@ -79,6 +79,15 @@ if [ -z "$TARGET_AGENT" ] || [ -z "$TASK" ]; then
   echo "ERROR: --target-agent and --task are mandatory fields."
   usage
 fi
+
+MAM_LOOP_MARKER="$REPO_ROOT/.mam/loop-guard-active"
+mkdir -p "$(dirname "$MAM_LOOP_MARKER")"
+_mam_lstart() { ps -p "$1" -o lstart= 2>/dev/null | tr -s ' ' | sed 's/^ *//;s/ *$//'; }
+printf 'pid=%s\nlstart=%s\nstarted=%s\n' \
+  "$$" "$(_mam_lstart $$)" "$(date -u +%Y-%m-%dT%H:%M:%SZ)" > "$MAM_LOOP_MARKER"
+_mam_release_guard() { rm -f "$MAM_LOOP_MARKER"; }
+trap _mam_release_guard EXIT INT TERM HUP
+
 delegate_job_safe() {
   local orig_script="$REPO_ROOT/.agents/skills/multi-agent-mux-delegate-job/multi-agent-mux-delegate-job"
   local tmp_script
@@ -88,7 +97,7 @@ delegate_job_safe() {
   local rc=0
   bash "$tmp_script" "$@" || rc=$?
   rm -f "$tmp_script"
-  trap - EXIT INT TERM HUP
+  trap _mam_release_guard EXIT INT TERM HUP
   return $rc
 }