diff --git a/workflow/src/legendsimflow/utils.py b/workflow/src/legendsimflow/utils.py
index 2671f46..9a75010 100644
--- a/workflow/src/legendsimflow/utils.py
+++ b/workflow/src/legendsimflow/utils.py
@@ -15,11 +15,12 @@
 
 from __future__ import annotations
 
-import os
+import fnmatch
 from datetime import datetime
 from pathlib import Path
 
 import legenddataflowscripts as ldfs
+import pyg4ometry as pg4
 from dbetto import AttrsDict
 from legendmeta import LegendMetadata
 
@@ -81,6 +82,88 @@ def _make_path(d):
     )
 
 
+def _get_matching_volumes(volume_list: list, patterns: str | list) -> list[int]:
+    """Get the list of volumes from the GDML. The string can include wildcards."""
+
+    wildcard_list = [patterns] if isinstance(patterns, str) else patterns
+
+    # find all volumes matching at least one pattern
+    matched_list = []
+    for key in volume_list:
+        for name in wildcard_list:
+            if fnmatch.fnmatch(key, name):
+                matched_list.append(key)
+    return matched_list
+
+
+def get_lar_minishroud_confine_commands(
+    reg: pg4.geant4.Registry,
+    pattern: str = "minishroud_side*",
+    inside: bool = True,
+    lar_name: str = "LAr",
+) -> list[str]:
+    """Extract the commands for the LAr confinement inside/ outside the NMS from the GDML.
+
+    Parameters
+    ----------
+    reg
+        The registry describing the geometry.
+    pattern
+        The pattern used to search for physical volumes of minishrouds.
+    inside
+        Where to generate points only inside NMS to exclude them.
+    lar_name
+        The name of the physical volume of the LAr.
+
+    Returns
+    -------
+    a list of confinement commands for remage.
+    """
+    string_list = _get_matching_volumes(list(reg.physicalVolumeDict.keys()), pattern)
+    # correct sampling mode
+    mode = "IntersectPhysicalWithGeometrical" if inside else "SubtractGeometrical"
+
+    # physical volume sampling
+    lines = [f"/RMG/Generator/Confinement/SamplingMode {mode}"]
+    lines += [f"/RMG/Generator/Confinement/Physical/AddVolume {lar_name}"]
+
+    for s in string_list:
+        vol = reg.physicalVolumeDict[s]
+
+        center = vol.position.eval()
+        solid = vol.logicalVolume.solid
+
+        outer_ms = solid.obj1
+        r_max = outer_ms.pRMax
+        dz = outer_ms.pDz
+
+        # type conversions from pyg4ometry types
+        if not isinstance(r_max, float):
+            r_max = r_max.eval()
+
+        if not isinstance(dz, float):
+            dz = dz.eval()
+
+        command = "AddSolid" if inside else "AddExcludeSolid"
+        lines.append(f"/RMG/Generator/Confinement/Geometrical/{command} Cylinder ")
+
+        lines.append(
+            f"/RMG/Generator/Confinement/Geometrical/CenterPositionX {center[0]} mm"
+        )
+        lines.append(
+            f"/RMG/Generator/Confinement/Geometrical/CenterPositionY {center[1]} mm"
+        )
+        lines.append(
+            f"/RMG/Generator/Confinement/Geometrical/CenterPositionZ {center[2]} mm"
+        )
+        lines.append(
+            f"/RMG/Generator/Confinement/Geometrical/Cylinder/OuterRadius {r_max} mm"
+        )
+        lines.append(f"/RMG/Generator/Confinement/Geometrical/Cylinder/Height {dz} mm")
+
+    return lines
+
+
 def setup_logdir_link(config: SimflowConfig, proctime):
     logdir = Path(config.paths.log)
     logdir.mkdir(parents=True, exist_ok=True)