diff --git a/init.lua b/init.lua
index 0179523..0000c6c 100644
--- a/init.lua
+++ b/init.lua
@@ -980,6 +980,12 @@ update_bone_recursive = function(p, b, dt)
         -- atan(dx, -dy): rot=0 when target is straight up, rot=pi/2 when target is to the right.
         local world_angle = math.atan(dx, -dy)
         local target_local = world_angle - pa
+        -- Normalize target_local to (-π, π] so snap/clamp don't see ±2π
+        -- discontinuities when parent.world.rot crosses ±π (e.g., body
+        -- facing south wraps parent.world.rot near ±π and target_local
+        -- can momentarily be ≈ ±2π without normalization → head flicks).
+        while target_local >  math.pi do target_local = target_local - 2 * math.pi end
+        while target_local < -math.pi do target_local = target_local + 2 * math.pi end
 
         -- Persistent state for slerp/rate-limit (carries angle across frames).
         local state = p.look_at_state[bid]
diff --git a/manifest.lib b/manifest.lib
index a7ec5bb..b8e52c1 100644
--- a/manifest.lib
+++ b/manifest.lib
@@ -1,6 +1,6 @@
 {
     "id": "lib-core.puppet",
-    "version": "0.4.0",
+    "version": "0.4.1",
     "api_min": "0.1",
     "deps": []
 }