diff --git a/src/gridguard_secure_attested_cross_domain_e/__init__.py b/src/gridguard_secure_attested_cross_domain_e/__init__.py
index 9ae3032..ec1d250 100644
--- a/src/gridguard_secure_attested_cross_domain_e/__init__.py
+++ b/src/gridguard_secure_attested_cross_domain_e/__init__.py
@@ -13,7 +13,7 @@ from .marketplace import AdaptersMarketplace
 from .simulation import SimulationHarness
 from .privacy import SecureAggregator, PrivacyBudget
 from .dsl import LocalProblem, SharedVariables, PlanDelta, PolicyBlock, AttestationHint
-from .bridge import to_canonical, from_canonical
+from .bridge import to_canonical, from_canonical, EnergiBridge
 
 __all__ = [
     "SecurityContractsRegistry",
@@ -33,4 +33,5 @@ __all__ = [
     "AttestationHint",
     "to_canonical",
     "from_canonical",
+    "EnergiBridge",
 ]
diff --git a/src/gridguard_secure_attested_cross_domain_e/attestation.py b/src/gridguard_secure_attested_cross_domain_e/attestation.py
index 9ae8740..b62cfe4 100644
--- a/src/gridguard_secure_attested_cross_domain_e/attestation.py
+++ b/src/gridguard_secure_attested_cross_domain_e/attestation.py
@@ -12,10 +12,16 @@ class AttestedAgent:
         self.agent_id = agent_id
         self.hardware = hardware
         self._credential: Optional[str] = None
+        # Lightweight DID-style identity; in a real system this would be bound to
+        # a hardware-backed identity and rotated periodically.
+        self._did: Optional[str] = None
 
     def attest(self) -> bool:
         # In a real system, remote attestation would happen here.
         self._credential = f"attest-{self.agent_id}-{self.hardware}-v1"
+        # Issue or refresh a minimal DID identity alongside attestation
+        if self._did is None:
+            self._did = f"did:gridguard:{self.agent_id}"
         return True
 
     @property
@@ -31,3 +37,28 @@ class AttestedAgent:
         """
         expected = f"attest-{self.agent_id}-{self.hardware}-v1"
         return credential == expected
+
+    @property
+    def did(self) -> str:
+        """Return the agent's Decentralized Identifier (DID).
+
+        If not yet issued, lazily generate a simple DID. This is a lightweight
+        stand-in for DID/identity binding in MVP contexts.
+        """
+        if self._did is None:
+            self._did = f"did:gridguard:{self.agent_id}"
+        return self._did
+
+    def rotate_identity(self) -> None:
+        """Rotate the agent's identity to simulate short-lived credentials.
+
+        In a production system this would refresh attestation keys and rotate
+        credentials. Here we simply mutate the DID suffix to reflect rotation.
+        """
+        suffix = getattr(self, "_did", None)
+        if suffix is None:
+            self._did = f"did:gridguard:{self.agent_id}"
+        else:
+            # Simple rotation by appending a timestamp-like suffix
+            import time
+            self._did = f"did:gridguard:{self.agent_id}:{int(time.time())}"
diff --git a/src/gridguard_secure_attested_cross_domain_e/bridge.py b/src/gridguard_secure_attested_cross_domain_e/bridge.py
index 2b0479f..1127e0b 100644
--- a/src/gridguard_secure_attested_cross_domain_e/bridge.py
+++ b/src/gridguard_secure_attested_cross_domain_e/bridge.py
@@ -37,3 +37,28 @@ class EnergiBridge:
     @staticmethod
     def from_canonical(canonical: Dict[str, Any]) -> Dict[str, Any]:
         return from_canonical(canonical)
+
+    @staticmethod
+    def to_canonical_with_contract(local_problem: Dict[str, Any], version: str = "1.0", contract_id: str = "default") -> Dict[str, Any]:
+        """Extended canonical representation including simple contract metadata.
+
+        This enhances the MVP bridge with a minimal Graph-of-Contracts hint to
+        help adapters interoperate in a CatOpt-like canonical form while keeping
+        the representation lightweight.
+        """
+        base = EnergiBridge.to_canonical(local_problem)
+        # Attach a tiny contract metadata block to aid auditing and routing
+        base_metadata = {
+            "GraphOfContracts": [
+                {
+                    "contract_id": contract_id,
+                    "version": version,
+                    "bindings": ["LocalProblems"],
+                    "notes": "mvp metadata" ,
+                }
+            ],
+            "ContractsVersion": version,
+        }
+        # Merge metadata into the canonical payload under a consistent key
+        base.update(base_metadata)
+        return base