diff --git a/src/execution-world/client-contracts.ts b/src/execution-world/client-contracts.ts
index d96161f..5f7cae6 100644
--- a/src/execution-world/client-contracts.ts
+++ b/src/execution-world/client-contracts.ts
@@ -213,17 +213,28 @@ export function generateComponentClientBindings(plan: ExecutionPlan, packageRevi
     `ExtraModuleProps<${JSON.stringify(JSON.stringify([iface, member]))}>`;
   // Preserve closed type arguments for the artifact consumer. Interpretation of
   // a particular module contract belongs to that consumer, not this compiler.
-  const moduleArguments = (iface: InterfaceRevision) => `[${(iface.application?.arguments ?? []).map(argument => {
-    if (argument.kind === "value") return tsType(argument.type);
-    const target = argument.target;
-    const reference = target.kind === "atom" ? `ManagedReference<"atom", ${JSON.stringify(target.atomId)}>` : `ManagedReference<"interface", ${JSON.stringify(target.interfaceRevisionId)}>`;
-    const fields = target.kind === "interface" ? find(target.interfaceRevisionId).members.flatMap(member => {
-      if ((member.kind !== "value" && member.kind !== "relationship") || !member.queryRead) return [];
-      const getter = member.operations.find(operation => operation.displayName === (member.kind === "value" ? "get" : "resolve"));
-      return getter ? [`readonly ${JSON.stringify(member.displayName)}: ${tsType(getter.outputType)}`] : [];
-    }) : [];
-    return `{readonly reference: ${reference}; readonly values: {${fields.join(";")}}}`;
-  }).join(",")}]`;
+  const moduleArguments = (iface: InterfaceRevision) =>
+    `[${(iface.application?.arguments ?? [])
+      .map((argument) => {
+        if (argument.kind === "value") return tsType(argument.type);
+        const target = argument.target;
+        const reference =
+          target.kind === "atom"
+            ? `ManagedReference<"atom", ${JSON.stringify(target.atomId)}>`
+            : `ManagedReference<"interface", ${JSON.stringify(target.interfaceRevisionId)}>`;
+        const fields =
+          target.kind === "interface"
+            ? find(target.interfaceRevisionId).members.flatMap((member) => {
+                if ((member.kind !== "value" && member.kind !== "relationship") || !member.queryRead) return [];
+                const getter = member.operations.find(
+                  (operation) => operation.displayName === (member.kind === "value" ? "get" : "resolve"),
+                );
+                return getter ? [`readonly ${JSON.stringify(member.displayName)}: ${tsType(getter.outputType)}`] : [];
+              })
+            : [];
+        return `{readonly reference: ${reference}; readonly values: {${fields.join(";")}}}`;
+      })
+      .join(",")}]`;
   const interfaces = generateInterfaceClientBindings(imports, "@quixos/camino-react", props);
   const subjectBindings = generateInterfaceClientBindings(subjects, "@quixos/camino-react", props)
     .split("\n")
diff --git a/src/execution-world/inspection.ts b/src/execution-world/inspection.ts
index e75e84d..88a28b2 100644
--- a/src/execution-world/inspection.ts
+++ b/src/execution-world/inspection.ts
@@ -18,7 +18,15 @@ const meta = () => selection("_camino", { selection: [selection("ref")] });
 export const inspectionPackage = "org.quixos.inspection/1";
 export interface InspectionTemplate {
   interface: string;
-  members: { id: string; name: string; key: string; flag: string; lane: "local" | "server"; many: boolean; relationship: boolean }[];
+  members: {
+    id: string;
+    name: string;
+    key: string;
+    flag: string;
+    lane: "local" | "server";
+    many: boolean;
+    relationship: boolean;
+  }[];
   inputs?: PublicQueryContract;
   view?: PublicQueryContract;
   server?: PublicQueryContract;
@@ -81,7 +89,15 @@ export function compileInspectionTemplates(plan: ExecutionPlan) {
         // Only native edges promise the relationship traversal used by the interpreter.
         if (member.kind === "relationship" && providers.some((op) => op!.binding.kind !== "edge")) continue;
         if (!complete && (lane === "local" || !portable))
-          template.members.push({ id: member.id, name: member.displayName, key, flag, lane, many, relationship: member.kind === "relationship" });
+          template.members.push({
+            id: member.id,
+            name: member.displayName,
+            key,
+            flag,
+            lane,
+            many,
+            relationship: member.kind === "relationship",
+          });
         inputFields[flag] = scalar("bool");
         const field = selection(member.displayName, {
           key,
diff --git a/src/execution-world/kernel.ts b/src/execution-world/kernel.ts
index 52f3082..5e12355 100644
--- a/src/execution-world/kernel.ts
+++ b/src/execution-world/kernel.ts
@@ -22,11 +22,11 @@ export function compileKernelProgram(plan: ExecutionPlan): unknown {
   if (hexDigest(plan.definition) !== plan.digest)
     throw new ExecutionPlanError("INVALID_PLAN", "kernel", "Plan digest mismatch");
   const workspace = plan.definition.workspace;
-  if (workspace.sharedAttachments.length)
+  if (workspace.sharedAttachments.some((attachment) => attachment.kind !== "edge"))
     throw new ExecutionPlanError(
       "UNSUPPORTED_SHARED_STORAGE",
       "kernel",
-      "Stage 0 requires explicit conformance-owned storage",
+      "Shared scalar storage is not implemented; use conformance-owned state",
     );
   const schema = (type: ValueType): unknown | null => {
     try {
@@ -36,7 +36,30 @@ export function compileKernelProgram(plan: ExecutionPlan): unknown {
     }
   };
   const ownerBySlot = new Map<string, string>();
-  const edges: { id: string; owner: string; a: unknown; b: unknown }[] = [];
+  const edges: { id: string; owner: string | null; a: unknown; b: unknown }[] = [];
+  const lowerEdge = (storage: Extract<PersistentAttachment, { kind: "edge" }>, owner: string | null) => {
+    const endpoints = storage.endpoints.map((endpoint) => {
+      if (endpoint.ordered || (endpoint.keyType && endpoint.keyType !== "string") || endpoint.retainOther)
+        throw new ExecutionPlanError(
+          "UNSUPPORTED_GRAPH_FEATURE",
+          storage.id,
+          "Ordered relations, non-string keys and automatic retention are not implemented",
+        );
+      return {
+        projection: endpoint.projectionId,
+        constraint: {
+          kind: endpoint.constraint.kind,
+          id:
+            endpoint.constraint.kind === "atom" ? endpoint.constraint.atomId : endpoint.constraint.interfaceRevisionId,
+        },
+        cardinality: endpoint.cardinality,
+        ...(endpoint.keyType ? { keyType: endpoint.keyType } : {}),
+        ...(endpoint.onDelete ? { onDelete: endpoint.onDelete } : {}),
+      };
+    });
+    edges.push({ id: storage.id, owner, a: endpoints[0], b: endpoints[1] });
+  };
+  for (const storage of workspace.sharedAttachments) if (storage.kind === "edge") lowerEdge(storage, null);
   const owners = plan.definition.owners.map((owner) => {
     const slots: unknown[] = [];
     for (const storage of owner.storage as PersistentAttachment[]) {
@@ -51,30 +74,7 @@ export function compileKernelProgram(plan: ExecutionPlan): unknown {
           policy: storage.storagePolicy.kind === "register" ? "register" : "crdt",
           ...(Object.hasOwn(storage, "defaultValue") ? { defaultLiteral: storage.defaultValue } : {}),
         });
-      } else {
-        const endpoints = storage.endpoints.map((endpoint) => {
-          if (endpoint.ordered || (endpoint.keyType && endpoint.keyType !== "string") || endpoint.retainOther)
-            throw new ExecutionPlanError(
-              "UNSUPPORTED_GRAPH_FEATURE",
-              storage.id,
-              "Ordered relations, non-string keys and automatic retention are not implemented",
-            );
-          return {
-            projection: endpoint.projectionId,
-            constraint: {
-              kind: endpoint.constraint.kind,
-              id:
-                endpoint.constraint.kind === "atom"
-                  ? endpoint.constraint.atomId
-                  : endpoint.constraint.interfaceRevisionId,
-            },
-            cardinality: endpoint.cardinality,
-            ...(endpoint.keyType ? { keyType: endpoint.keyType } : {}),
-            ...(endpoint.onDelete ? { onDelete: endpoint.onDelete } : {}),
-          };
-        });
-        edges.push({ id: storage.id, owner: owner.id, a: endpoints[0], b: endpoints[1] });
-      }
+      } else lowerEdge(storage, owner.id);
     }
     return {
       id: owner.id,
diff --git a/src/execution-world/plan.ts b/src/execution-world/plan.ts
index 0e155d3..9f23f7e 100644
--- a/src/execution-world/plan.ts
+++ b/src/execution-world/plan.ts
@@ -82,7 +82,9 @@ function componentDeclarations(workspace: WorkspaceRevision, pkg: WorkspaceRevis
     ...(pkg.modules ?? []).flatMap((module) => {
       const contract = moduleContract(workspace.interfaceImports, module)!;
       if (
-        !["org.quixos.react.component/1", "org.quixos.react.component/2", "org.quixos.react.subject-only/1"].includes(contract.contract) ||
+        !["org.quixos.react.component/1", "org.quixos.react.component/2", "org.quixos.react.subject-only/1"].includes(
+          contract.contract,
+        ) ||
         contract.subject?.kind !== "interface"
       )
         return [];
diff --git a/test/keyed-relationships.test.ts b/test/keyed-relationships.test.ts
index 6827552..079bf67 100644
--- a/test/keyed-relationships.test.ts
+++ b/test/keyed-relationships.test.ts
@@ -76,3 +76,35 @@ test("key contracts cannot silently bind to unkeyed storage or the inverse proje
     assert.match(JSON.stringify(result.diagnostics), /key type|keyed projection|signature/i);
   }
 });
+
+test("checked shared edges lower without granting conformance initialization ownership", () => {
+  const edge = declarations.match(/  private edge Entries[\s\S]*?\n  }/)![0];
+  const shared = declarations
+    .replace(edge, "")
+    .replace(" conform Node as", edge.replace("private edge", "shared edge") + "\n conform Node as");
+  const result = compile(shared);
+  assert.ok(result.ok, JSON.stringify(result.diagnostics));
+  const program = compileKernelProgram(compileExecutionPlan(result.workspace)) as {
+    model: { edges: { id: string; owner: string | null }[] };
+  };
+  assert.deepEqual(
+    program.model.edges.map((edge) => ({ id: edge.id, owner: edge.owner })),
+    [{ id: "entries", owner: null }],
+  );
+  const seeded = compile(
+    shared.replace(
+      "  bind entries.resolve",
+      "  initialize { initial to edge Entries.entries; };\n  bind entries.resolve",
+    ),
+  );
+  assert.ok(!seeded.ok);
+  assert.ok(seeded.diagnostics.some((issue) => issue.code === "invalid-initialization"));
+  const scalar = compile(
+    shared.replace(
+      ' atom Node id "node";',
+      ' atom Node id "node"; shared state Shared id "shared" on Node : string policy register default "";',
+    ),
+  );
+  assert.ok(scalar.ok, JSON.stringify(scalar.diagnostics));
+  assert.throws(() => compileKernelProgram(compileExecutionPlan(scalar.workspace)), /UNSUPPORTED_SHARED_STORAGE/);
+});
diff --git a/test/presentations.test.ts b/test/presentations.test.ts
index 19b26ec..ab69e70 100644
--- a/test/presentations.test.ts
+++ b/test/presentations.test.ts
@@ -148,7 +148,9 @@ test("standalone presentation rejects a general component contract that may requ
   assert.equal(member.kind, "module");
   if (member.kind !== "module") throw Error("Expected module");
   member.contract = "org.quixos.react.component/1";
-  assert.ok(validateWorkspaceRevision(candidate).some((issue) => /subject-only/.test(issue.message)));
+  assert.ok(
+    validateWorkspaceRevision(candidate).some((issue) => /supported React presentation contract/.test(issue.message)),
+  );
 });
 
 test("checked component-only artifacts install without a service and reject missing or substituted entries", async () => {