diff --git a/README.md b/README.md
index fb70441..7436b9a 100644
--- a/README.md
+++ b/README.md
@@ -37,3 +37,12 @@ Testing and packaging
 
 If helpful, I can draft toy adapter blueprints, an EnergiBridge mapping for ArbSphere,
 and a minimal two-venue toy contract to bootstrap interoperability.
+
+Two-Venue MVP Orchestrator
+- A small Python script (orchestrator.py) wired in idea159_arbsphere_federated_cross/ that demonstrates a complete two-venue flow:
+  - Build two LocalArbProblem instances for two venues
+  - Run admm_step against each to produce PlanDelta
+  - Deterministically merge deltas via EnergiBridge.merge_deltas
+  - Serialize to canonical IR with EnergiBridge.to_ir
+  - Route the merged delta through a toy broker adapter to simulate execution
+- This serves as a practical, end-to-end demonstration of ArbSphere interoperability across two exchanges and a minimal governance/traceable flow.
diff --git a/idea159_arbsphere_federated_cross/orchestrator.py b/idea159_arbsphere_federated_cross/orchestrator.py
new file mode 100644
index 0000000..0a6fcc3
--- /dev/null
+++ b/idea159_arbsphere_federated_cross/orchestrator.py
@@ -0,0 +1,68 @@
+from __future__ import annotations
+
+"""Two-venue MVP orchestrator for ArbSphere (toy demo).
+
+This script wires two LocalArbProblem instances (representing two venues)
+with their corresponding SharedSignals, runs the minimal ADMM step for each,
+merges the resulting PlanDelta deterministically via EnergiBridge, and routes
+the combined delta through a mock broker adapter to demonstrate end-to-end
+flow in a two-venue setting.
+"""
+
+from datetime import datetime
+
+from idea159_arbsphere_federated_cross.core import LocalArbProblem, SharedSignals
+from idea159_arbsphere_federated_cross.solver import admm_step
+from idea159_arbsphere_federated_cross.energi_bridge import EnergiBridge
+from idea159_arbsphere_federated_cross.adapters.broker_adapter import MockBrokerAdapter
+
+
+def build_local_venue(venue: str, asset_pair: str, target_misprice: float, max_exposure: float, latency_budget_ms: int) -> LocalArbProblem:
+    return LocalArbProblem(
+        id=f"lp-{venue}-{datetime.utcnow().isoformat()}",
+        venue=venue,
+        asset_pair=asset_pair,
+        target_misprice=target_misprice,
+        max_exposure=max_exposure,
+        latency_budget_ms=latency_budget_ms,
+    )
+
+
+def build_signals(version: int, price_delta: float, cross_venue_corr: float, liquidity: float) -> SharedSignals:
+    return SharedSignals(
+        version=version,
+        price_delta=price_delta,
+        cross_venue_corr=cross_venue_corr,
+        liquidity=liquidity,
+    )
+
+
+def run_two_venue_demo() -> None:
+    # Venue 1
+    local1 = build_local_venue("NYSE", "AAPL/GOOG", 0.5, 1_000_000.0, 50)
+    signals1 = build_signals(version=1, price_delta=0.10, cross_venue_corr=0.85, liquidity=1_000_000.0)
+    delta1 = admm_step(local1, signals1)
+
+    # Venue 2
+    local2 = build_local_venue("LON", "GOOG/AMZN", 0.6, 1_000_000.0, 60)
+    signals2 = build_signals(version=1, price_delta=0.08, cross_venue_corr=0.80, liquidity=1_200_000.0)
+    delta2 = admm_step(local2, signals2)
+
+    # Deterministic merge of deltas (toy CRDT-like merge)
+    merged = EnergiBridge.merge_deltas(delta1, delta2)
+
+    # Serialize to canonical IR (for adapters)
+    ir = EnergiBridge.to_ir(local1, signals1, delta=merged)
+    print("Canonical IR payload:")
+    print(ir)
+
+    # Route to a mock broker to demonstrate end-to-end flow
+    broker = MockBrokerAdapter()
+    ack = broker.consume(merged)  # type: ignore[arg-type]
+    print("Broker acknowledged delta. Actions:", merged.actions)
+    print("DeltaID:", merged.delta_id)
+    print("Completed two-venue demo at", datetime.utcnow().isoformat())
+
+
+if __name__ == "__main__":
+    run_two_venue_demo()