diff --git a/crates/oa-desktop/src/behavior.rs b/crates/oa-desktop/src/behavior.rs
index 3f9fd97..f1ef5b7 100644
--- a/crates/oa-desktop/src/behavior.rs
+++ b/crates/oa-desktop/src/behavior.rs
@@ -1121,6 +1121,10 @@ fn in_machine(p: &Project, id: Id, machine: Id) -> bool {
 #[path = "../../../harness/experiments/behavior-layout-scene-20260912/mod.rs"]
 mod behavior_layout_scene_experiment;
 
+#[cfg(test)]
+#[path = "../../../harness/experiments/behavior-anchor-plan-20260912/mod.rs"]
+mod behavior_anchor_plan_experiment;
+
 struct BoxItem {
     id: Id,
     rect: Rectangle,
@@ -1332,6 +1336,8 @@ impl Scene {
         let mut y = if scenario { 148. } else { 120. };
         scene.occurrences(p, owner, scenario, &lane_x, &mut y, 0);
         scene.size.height = (y + 45.).max(210.);
+        #[cfg(test)]
+        behavior_anchor_plan_experiment::scene_extent(&mut scene);
         if scenario {
             scene.lifecycle = scenario_lifecycle::render::Rendering::new(
                 p,
@@ -1441,6 +1447,8 @@ impl Scene {
             }
             #[cfg(test)]
             behavior_layout_scene_experiment::resolve_row_anchor(*id, y);
+            #[cfg(test)]
+            behavior_anchor_plan_experiment::row_anchor(*id, y);
             if ordered {
                 let slot = scenario::Slot {
                     parent: owner,
@@ -1465,6 +1473,8 @@ impl Scene {
                             (*y - top).max(95.),
                         ),
                     );
+                    #[cfg(test)]
+                    let rect = behavior_anchor_plan_experiment::frame_bounds(*id, rect);
                     self.boxes.insert(
                         0,
                         BoxItem {
@@ -1649,6 +1659,8 @@ impl Scene {
         }
         if ordered {
             self.sequence_bounds.insert(owner, (sequence_top, *y - 42.));
+            #[cfg(test)]
+            behavior_anchor_plan_experiment::scope_end(owner, y, &mut self.sequence_bounds);
             let slot = scenario::Slot {
                 parent: owner,
                 before: None,