diff --git a/delta_mesh/Adapters/bridge_stub/README.md b/delta_mesh/Adapters/bridge_stub/README.md
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+# Bridge Stub Adapter
+
+This directory contains a minimal, toy adapter stub that demonstrates how a data feed and a venue API could plug into the DeltaMesh canonical IR (LocalMarket, SharedSignals, PlanDelta).
+
+- No external dependencies
+- TLS-enabled skeleton wiring planned for Phase 0
+- Exposes simple, well-known JSON slices to facilitate interoperability testing
+
+Usage:
+- This is a scaffold for future adapters. The real adapters will implement the same interface contracts as defined in delta_mesh/Interop/interop_registry.json.
diff --git a/delta_mesh/Interop/interop_registry.json b/delta_mesh/Interop/interop_registry.json
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+++ b/delta_mesh/Interop/interop_registry.json
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+{
+  "graph_of_contracts": {
+    "LocalMarket": {"id": "lm.v1", "description": "Local market primitives"},
+    "SharedSignals": {"id": "ss.v1", "description": "Aggregated signals"},
+    "PlanDelta": {"id": "pd.v1", "description": "Delta planning"},
+    "AuditLog": {"id": "al.v1", "description": "Tamper-evident logs"}
+  },
+  "adapters": [
+    {"name": "venue-feed", "version": "v0.1", "endpoint": "wss://example.feed/"},
+    {"name": "venue-api", "version": "v0.1", "endpoint": "https://example.api/"}
+  ]
+}
diff --git a/delta_mesh/dsl/AuditLog.seed.json b/delta_mesh/dsl/AuditLog.seed.json
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+++ b/delta_mesh/dsl/AuditLog.seed.json
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+{
+  "name": "AuditLog",
+  "version": "v1",
+  "fields": ["entry", "signature", "timestamp"]
+}
diff --git a/delta_mesh/dsl/LocalMarket.seed.json b/delta_mesh/dsl/LocalMarket.seed.json
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+++ b/delta_mesh/dsl/LocalMarket.seed.json
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+{
+  "name": "LocalMarket",
+  "version": "v1",
+  "fields": ["inventory", "quotes", "risk_budget", "margin"]
+}
diff --git a/delta_mesh/dsl/PlanDelta.seed.json b/delta_mesh/dsl/PlanDelta.seed.json
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+++ b/delta_mesh/dsl/PlanDelta.seed.json
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+{
+  "name": "PlanDelta",
+  "version": "v1",
+  "fields": ["quotes", "hedges", "routing_decision", "timestamp"]
+}
diff --git a/delta_mesh/dsl/PrivacyBudget.seed.json b/delta_mesh/dsl/PrivacyBudget.seed.json
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+++ b/delta_mesh/dsl/PrivacyBudget.seed.json
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+{
+  "name": "PrivacyBudget",
+  "version": "v1",
+  "fields": ["per_message_budget", "total_budget", "privacy_mechanism"]
+}
diff --git a/delta_mesh/dsl/SharedSignals.seed.json b/delta_mesh/dsl/SharedSignals.seed.json
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+++ b/delta_mesh/dsl/SharedSignals.seed.json
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+{
+  "name": "SharedSignals",
+  "version": "v1",
+  "fields": ["greeks", "ivol", "liquidity", "latency_budget"]
+}