diff --git a/README.md b/README.md
index cc05372..582be0c 100644
--- a/README.md
+++ b/README.md
@@ -20,3 +20,9 @@ How to run tests and build:
 
 This is an MVP. Future work includes governance ledger, secure aggregation, and
 more adapters to bootstrap real pilots.
+
+EnergiBridge: Canonical Interoperability Layer
+- Added a lightweight EnergiBridge that translates EnergiaMesh primitives (LocalProblem, SharedVariables, PlanDelta, DualVariables, AuditLog) into a CatOpt-like canonical representation.
+- Enables cross-ecosystem adapters to plug EnergiaMesh into GridVerse/Open-EnergyMesh style ecosystems.
+- Public API: EnergiBridge.to_catopt(obj) and EnergiBridge.translate_batch(objs).
+- Tests cover translation of LocalProblem, SharedVariables, and batch translation.
diff --git a/src/energiamesh/__init__.py b/src/energiamesh/__init__.py
index b19a36c..f2bea06 100644
--- a/src/energiamesh/__init__.py
+++ b/src/energiamesh/__init__.py
@@ -5,6 +5,7 @@ contract-driven federation across devices.
 """
 
 from .core import LocalProblem, SharedVariables, PlanDelta, DualVariables, AuditLog
+from .bridge import EnergiBridge
 from .registry import GraphOfContractsRegistry
 
 __all__ = [
@@ -14,4 +15,5 @@ __all__ = [
     "DualVariables",
     "AuditLog",
     "GraphOfContractsRegistry",
+    "EnergiBridge",
 ]
diff --git a/src/energiamesh/bridge.py b/src/energiamesh/bridge.py
new file mode 100644
index 0000000..3e8331f
--- /dev/null
+++ b/src/energiamesh/bridge.py
@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+"""EnergiBridge: canonical bridge for cross-ecosystem interoperability.
+
+This module provides a minimal, production-friendly bridge that maps
+EnergiaMesh core primitives to a CatOpt-like canonical form. It is designed
+to be lightweight MVP-friendly, serializable, and usable by adapters across
+vendors. The bridge intentionally delegates complex translation to the
+CatOptBridge for core primitives to keep concerns separated.
+"""
+
+from typing import Any, Dict
+
+from energiamesh.catopt_bridge import CatOptBridge
+from energiamesh.core import (
+    LocalProblem,
+    SharedVariables,
+    PlanDelta,
+    DualVariables,
+    AuditLog,
+)
+
+
+class EnergiBridge:
+    """Canonical bridge translating EnergiaMesh primitives into CatOpt-like dicts."""
+
+    def __init__(self, version: str = "0.1") -> None:
+        self.version = version
+        self._bridge = CatOptBridge()
+
+    def to_catopt(self, obj: Any) -> Dict[str, Any]:
+        """Translate a single EnergiaMesh object into a CatOpt-like dict.
+
+        Supported types: LocalProblem, SharedVariables, PlanDelta,
+        DualVariables, AuditLog.
+        """
+        # Decorate with version at the top level for traceability
+        base = self._bridge.to_catopt(obj) if obj is not None else {}
+        if not base:
+            raise TypeError(f"Unsupported object type for EnergiBridge: {type(obj)!r}")
+        base["bridge_version"] = self.version
+        return base
+
+    def translate_batch(self, objs: list[Any]) -> list[Dict[str, Any]]:
+        """Translate a list of EnergiaMesh objects to a list of CatOpt-like dicts."""
+        return [self.to_catopt(o) for o in objs]
+
+
+__all__ = ["EnergiBridge"]
diff --git a/tests/test_bridge.py b/tests/test_bridge.py
new file mode 100644
index 0000000..5065f18
--- /dev/null
+++ b/tests/test_bridge.py
@@ -0,0 +1,30 @@
+from energiamesh.bridge import EnergiBridge
+from energiamesh.core import LocalProblem, SharedVariables, PlanDelta, DualVariables, AuditLog
+
+
+def test_energi_bridge_local_problem_translation():
+    lb = LocalProblem(site_id="site-1", objective="minimize_cost")
+    bridge = EnergiBridge()
+    data = bridge.to_catopt(lb)
+    assert data["type"] == "LocalProblem"
+    assert data["site_id"] == "site-1"
+    assert data["version"] == bridge.version
+
+
+def test_energi_bridge_shared_variables_translation():
+    sv = SharedVariables(signals={"forecast": {"temp": 20}})
+    bridge = EnergiBridge()
+    data = bridge.to_catopt(sv)
+    assert data["type"] == "SharedVariables"
+    assert "signals" in data
+
+
+def test_energi_bridge_batch_translation():
+    bridge = EnergiBridge()
+    lb = LocalProblem(site_id="site-2", objective="dispatch")
+    dv = DualVariables(multipliers={"lambda": 1.0})
+    ad = AuditLog()
+    results = bridge.translate_batch([lb, dv, ad])
+    assert isinstance(results, list)
+    assert len(results) == 3
+    assert results[0]["type"] == "LocalProblem"