diff --git a/nova_plan/contracts.py b/nova_plan/contracts.py
index ca68809..bf73842 100644
--- a/nova_plan/contracts.py
+++ b/nova_plan/contracts.py
@@ -59,3 +59,17 @@ class ContractRegistry:
     @classmethod
     def version_of(cls, name: str, default: int | None = None) -> int | None:
         return cls._registry.get(name, default)
+
+# Auto-register core contracts for quick interoperability in MVP workflows.
+# This ensures a minimal, versioned contract surface is available as soon as
+# the module is imported, which benefits tooling and adapters that rely on
+# contract versioning without requiring explicit setup code in downstream
+# components.
+for _name, _ver in [
+    ("PlanDelta", 1),
+    ("SharedSchedule", 1),
+    ("ResourceUsage", 1),
+    ("PrivacyBudget", 1),
+    ("AuditLog", 1),
+]:
+    ContractRegistry.register(_name, _ver)