diff --git a/exoroute/toy_schemes.py b/exoroute/toy_schemes.py
new file mode 100644
index 0000000..5385f3b
--- /dev/null
+++ b/exoroute/toy_schemes.py
@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from .primitives import LocalProblem, SharedVariables, PlanDelta, DualVariables, PrivacyBudget, AuditLog, GraphOfContractsRegistry
+
+
+def sample_local_problem() -> LocalProblem:
+    return LocalProblem(
+        id="lp-demo",
+        domain="equities",
+        assets=["AAPL", "MSFT"],
+        objective="minimize expected cost",
+        constraints={"max_risk": 0.05},
+    )
+
+
+def sample_shared_variables() -> SharedVariables:
+    return SharedVariables(
+        forecasts={"AAPL": 150.0, "MSFT": 300.0},
+        priors={"AAPL": 149.5, "MSFT": 299.5},
+        version=1,
+    )
+
+
+def sample_plan_delta() -> PlanDelta:
+    return PlanDelta(
+        delta={"action": "rebalance", "targets": {"AAPL": 100}},
+        timestamp=0.0,
+        author="toy-simulator",
+        contract_id="lp-demo",
+        signature=None,
+    )
+
+
+def sample_dual_variables() -> DualVariables:
+    return DualVariables(lambda_latency=0.0, lambda_fees=0.0)
+
+
+def sample_privacy_budget() -> PrivacyBudget:
+    return PrivacyBudget(budget=1.0, expiry=None)
+
+
+def sample_audit_log() -> AuditLog:
+    import time
+    return AuditLog(entry="demo", signer="toy-signer", timestamp=time.time(), contract_id="lp-demo", version=1)
+
+
+def sample_registry() -> GraphOfContractsRegistry:
+    reg = GraphOfContractsRegistry()
+    reg.register("adapter-demo", "v0.1")
+    return reg
+
+
+__all__ = [
+    "sample_local_problem",
+    "sample_shared_variables",
+    "sample_plan_delta",
+    "sample_dual_variables",
+    "sample_privacy_budget",
+    "sample_audit_log",
+    "sample_registry",
+]