diff --git a/bin/purge.sh b/bin/purge.sh
index ce67c57..58e9f0f 100755
--- a/bin/purge.sh
+++ b/bin/purge.sh
@@ -68,8 +68,13 @@ perform_purge() {
     local stats_dir="${XDG_CACHE_HOME:-$HOME/.cache}/mole"
     local monitor_pid=""
 
-    # Cleanup function
+    # Cleanup function - use flag to prevent duplicate execution
+    _cleanup_done=false
     cleanup_monitor() {
+        # Prevent multiple cleanup executions from trap conflicts
+        [[ "$_cleanup_done" == "true" ]] && return
+        _cleanup_done=true
+
         # Remove scanning file to stop monitor
         rm -f "$stats_dir/purge_scanning" 2> /dev/null || true
 
diff --git a/lib/clean/project.sh b/lib/clean/project.sh
index 762be9d..eecf872 100644
--- a/lib/clean/project.sh
+++ b/lib/clean/project.sh
@@ -786,7 +786,12 @@ clean_project_artifacts() {
         echo ""
         exit 130
     }
-    trap cleanup_scan INT TERM
+    # Set up signal handling only if not already set by parent script
+    # This prevents trap conflicts between purge.sh and project.sh
+    if [[ -z "${_MO_PURGE_TRAP_SET:-}" ]]; then
+        trap cleanup_scan INT TERM
+        export _MO_PURGE_TRAP_SET=1
+    fi
     # Scanning is started from purge.sh with start_inline_spinner
     # Launch all scans in parallel
     for path in "${PURGE_SEARCH_PATHS[@]}"; do