diff --git a/interplanetary_edge_orchestrator_privacy/__init__.py b/interplanetary_edge_orchestrator_privacy/__init__.py
index c06511d..c87941a 100644
--- a/interplanetary_edge_orchestrator_privacy/__init__.py
+++ b/interplanetary_edge_orchestrator_privacy/__init__.py
@@ -4,5 +4,11 @@ orchestrator suitable for offline-first operation in space habitats.
 """
 
 from .federated import Client, Server
-
-__all__ = ["Client", "Server"]
+try:
+    # Optional: Expose registry helpers for MVP interoperability without
+    # forcing a hard dependency in tests that only exercise federation.
+    from .go_registry import register_contract, get_contract_schema, list_contracts  # type: ignore
+    __all__ = ["Client", "Server", "register_contract", "get_contract_schema", "list_contracts"]
+except Exception:
+    # If registry is not available for some environments, still expose the core APIs.
+    __all__ = ["Client", "Server"]
diff --git a/interplanetary_edge_orchestrator_privacy/go_registry.py b/interplanetary_edge_orchestrator_privacy/go_registry.py
new file mode 100644
index 0000000..ee1c660
--- /dev/null
+++ b/interplanetary_edge_orchestrator_privacy/go_registry.py
@@ -0,0 +1,36 @@
+"""Graph-of-Contracts registry (MVP).
+
+This module provides a tiny, in-memory registry for contract schemas that adapters
+can publish and query. It is intentionally minimal and side-effect free so tests
+and MVP clients can import it without pulling in additional dependencies.
+"""
+
+from __future__ import annotations
+
+from typing import Any, Dict, Optional
+
+_registry: Dict[str, Dict[str, Dict[str, Any]]] = {}
+
+
+def register_contract(name: str, version: str, schema: Dict[str, Any]) -> None:
+    """Register or update a contract schema for a given name and version.
+
+    - name: canonical contract name (e.g., "NovaPlan", "CatOpt").
+    - version: semantic version string.
+    - schema: a serializable dictionary describing the contract surface.
+    """
+    global _registry
+    _registry.setdefault(name, {})[version] = schema
+
+
+def get_contract_schema(name: str, version: str) -> Optional[Dict[str, Any]]:
+    """Return the registered schema for a name/version, if present."""
+    return _registry.get(name, {}).get(version)
+
+
+def list_contracts() -> Dict[str, Dict[str, Dict[str, Any]]]:
+    """Return the full in-memory registry mapping.
+
+    Structure: { name: { version: schema_dict, ... }, ... }
+    """
+    return _registry