diff --git a/deltaforge_skeleton/coordination.py b/deltaforge_skeleton/coordination.py
index 9a54913..ef9377b 100644
--- a/deltaforge_skeleton/coordination.py
+++ b/deltaforge_skeleton/coordination.py
@@ -17,9 +17,11 @@ class ADMMCoordinator:
         self.rho = rho
 
     def coordinate(self, plan: PlanDelta, venues: List[str]) -> PlanDelta:
-        if not plan or not plan.steps:
+        if plan is None:
             return plan
-        # Minimal ADMM-like annotation to indicate coordination happened
+        # Ensure the plan has a steps list; initialize if missing for robustness
+        if not hasattr(plan, "steps") or plan.steps is None:
+            plan.steps = []  # type: ignore[attr-defined]
         venues_str = ",".join(venues) if venues else "[]"
         plan.steps.append(f"ADMM_COORDINATE between [{venues_str}] with rho={self.rho}")
         return plan
diff --git a/deltaforge_skeleton/dsl.py b/deltaforge_skeleton/dsl.py
index 67764e8..ab021c2 100644
--- a/deltaforge_skeleton/dsl.py
+++ b/deltaforge_skeleton/dsl.py
@@ -46,5 +46,7 @@ class DualVariables:
 class PlanDelta:
     # A delta plan that can be applied to move a local problem toward feasibility
     actions: List[StrategyDelta] = field(default_factory=list)
+    # Optional sequence of high-level orchestration steps or annotations
+    steps: List[str] = field(default_factory=list)
     timestamp: float = 0.0
     safety_tags: List[str] = field(default_factory=list)