diff --git a/modeling-cmds/src/def_enum.rs b/modeling-cmds/src/def_enum.rs
index b112a13c..975a68bb 100644
--- a/modeling-cmds/src/def_enum.rs
+++ b/modeling-cmds/src/def_enum.rs
@@ -100,9 +100,11 @@ define_modeling_cmd_enum! {
             /// Segment to append to the path.
             /// This segment will implicitly begin at the current "pen" location.
             pub segment: PathSegment,
+            /// Optional label to associate with the new path segment.
+            #[serde(default, skip_serializing_if = "String::is_empty")]
+            pub label: String,
         }
 
-
         /// Command for extruding a solid 2d.
         #[derive(
             Debug, Clone, PartialEq, Serialize, Deserialize, JsonSchema, ModelingCmdVariant,
diff --git a/modeling-session/examples/cube_png.rs b/modeling-session/examples/cube_png.rs
index 54397cb3..05216902 100644
--- a/modeling-session/examples/cube_png.rs
+++ b/modeling-session/examples/cube_png.rs
@@ -90,6 +90,7 @@ async fn main() -> Result<()> {
                         end: point,
                         relative: false,
                     },
+                    label: Default::default(),
                 }
                 .into(),
             )
diff --git a/modeling-session/examples/cube_png_batch.rs b/modeling-session/examples/cube_png_batch.rs
index 505acaca..7e10d691 100644
--- a/modeling-session/examples/cube_png_batch.rs
+++ b/modeling-session/examples/cube_png_batch.rs
@@ -87,6 +87,7 @@ async fn main() -> Result<()> {
             cmd: ModelingCmd::ExtendPath(ExtendPath {
                 path,
                 segment: PathSegment::Line { end, relative: false },
+                label: Default::default(),
             }),
         }),
     );
diff --git a/modeling-session/examples/lsystem_png_batch.rs b/modeling-session/examples/lsystem_png_batch.rs
index 69e44166..078014f2 100644
--- a/modeling-session/examples/lsystem_png_batch.rs
+++ b/modeling-session/examples/lsystem_png_batch.rs
@@ -121,6 +121,7 @@ async fn main() -> Result<()> {
                             },
                             relative: false,
                         },
+                        label: Default::default(),
                     }),
                 });
             }