diff --git a/README.md b/README.md
index 6eb860e..b2f8845 100644
--- a/README.md
+++ b/README.md
@@ -34,3 +34,11 @@ Notes
 - This repository emphasizes minimal, pragmatic changes; the goal is to establish a safe, extensible MVP while keeping the codebase approachable for contributors.
 
 See AGENTS.md for architectural guidance and testing rules.
+
+EnergiBridge interoperability (beta)
+- Added a minimal EnergiBridge scaffold to map Open-EnergyMesh primitives to a canonical, vendor-agnostic contract representation and a Graph-of-Contracts registry.
+- Included toy adapters to bootstrap cross-ecosystem interoperability:
+  - adapters/energi_bridge/inverter_bridge_adapter.js
+  - adapters/energi_bridge/der_bridge_adapter.js
+- These adapters integrate with the existing MVP via the ADMM-lite path and demonstrate how to plug in device-specific models.
+- This work lays the groundwork for Phase 0 protocol skeleton, registry of adapters, and TLS-based transport in future iterations.
diff --git a/adapters/energi_bridge/der_bridge_adapter.js b/adapters/energi_bridge/der_bridge_adapter.js
new file mode 100644
index 0000000..4bdd268
--- /dev/null
+++ b/adapters/energi_bridge/der_bridge_adapter.js
@@ -0,0 +1,24 @@
+// Toy DER/Storage bridge adapter for EnergiBridge canonical path
+class DerBridgeAdapter {
+  constructor(id) {
+    this.id = id;
+  }
+
+  // Simple solve that models a local demand/consumption signal
+  solve(localProblem, /* sharedVariables */) {
+    const target = (localProblem && localProblem.vars && typeof localProblem.vars.value === 'number')
+      ? localProblem.vars.value
+      : 0;
+    // Produce a modest consumption to demonstrate delta-sync behavior
+    const consumptionW = Math.max(0, target * 0.2);
+    return {
+      generationW: 0,
+      consumptionW,
+      netFlowW: -consumptionW
+    };
+  }
+}
+
+module.exports = {
+  DerBridgeAdapter
+};
diff --git a/adapters/energi_bridge/inverter_bridge_adapter.js b/adapters/energi_bridge/inverter_bridge_adapter.js
new file mode 100644
index 0000000..fd98eca
--- /dev/null
+++ b/adapters/energi_bridge/inverter_bridge_adapter.js
@@ -0,0 +1,27 @@
+// Toy inverter bridge adapter for EnergiBridge canonical path
+class InverterBridgeAdapter {
+  constructor(id) {
+    this.id = id;
+  }
+
+  // Lightweight solve() method compatible with EnergyMesh.admmAdapter usage
+  // Computes a simple plan targeting the current localProblem value
+  solve(localProblem, /* sharedVariables */) {
+    const target = (localProblem && localProblem.vars && typeof localProblem.vars.value === 'number')
+      ? localProblem.vars.value
+      : 0;
+    // Simple heuristic: approach target as generation; no load signal here
+    const generationW = Math.max(0, target * 0.95);
+    const result = {
+      generationW,
+      // Keep consumption at 0 in this toy adapter; focus is demonstrating path
+      consumptionW: 0,
+      netFlowW: generationW
+    };
+    return result;
+  }
+}
+
+module.exports = {
+  InverterBridgeAdapter
+};
diff --git a/src/energi_bridge.js b/src/energi_bridge.js
new file mode 100644
index 0000000..fcf455c
--- /dev/null
+++ b/src/energi_bridge.js
@@ -0,0 +1,56 @@
+// EnergiBridge: Lightweight canonical bridge for interoperability in Open-EnergyMesh MVP
+// This module provides minimal scaffolding for a CatOpt-like bridge that maps
+// primitives to a vendor-agnostic contract representation and a Graph-of-Contracts
+// registry for adapters and data schemas.
+
+class GraphOfContracts {
+  constructor() {
+    this.contracts = new Map(); // contractName -> schema
+    this.adapters = new Map(); // adapterName -> { contractName, adapter }
+  }
+
+  registerContract(contractName, schema) {
+    this.contracts.set(contractName, schema);
+  }
+
+  getContract(contractName) {
+    return this.contracts.get(contractName);
+  }
+
+  registerAdapter(adapterName, contractName, adapter) {
+    this.adapters.set(adapterName, { contractName, adapter });
+  }
+
+  getAdapter(adapterName) {
+    return this.adapters.get(adapterName);
+  }
+}
+
+class EnergiBridge {
+  constructor() {
+    this.registry = new GraphOfContracts();
+  }
+
+  // Minimal canonical mapping from a local Open-EnergyMesh primitive to a
+  // CatOpt-like canonical object. The real project would implement richer
+  // mappings; this is a skeleton to bootstrap adapters.
+  static toCanonical(primitive) {
+    if (!primitive) return null;
+    // Heuristic-based mapping: detect common shapes
+    if (primitive.localProblem || primitive.LocalProblem) {
+      const lp = primitive.localProblem || primitive.LocalProblem;
+      return { Objects: 'LocalProblem', payload: lp };
+    }
+    if (primitive.sharedVariables || primitive.SharedVariables) {
+      const sv = primitive.sharedVariables || primitive.SharedVariables;
+      return { Morphisms: 'SharedVariables', payload: sv };
+    }
+    // Fallback: wrap as a generic contract element
+    return { Objects: 'Unknown', payload: primitive };
+  }
+}
+
+module.exports = {
+  EnergiBridge,
+  GraphOfContracts
+};