Expose closed module types and define stable presentation occurrences

src/execution-world/module-contracts.ts

@@ -0,0 +1,17 @@
+import type { InterfaceRevision } from "../capability-model/types.js";
+
+/** Public, checked type information for artifact consumers. It describes the
+ * nominal role, without exposing implementations or synthesizing any storage. */
+export function moduleTypeContext(iface: InterfaceRevision): {
+  typeArguments?: readonly unknown[];
+  requiredInterfaces?: readonly string[];
+} {
+  return {
+    ...(iface.application?.arguments.length
+      ? {
+          typeArguments: structuredClone(iface.application.arguments),
+        }
+      : {}),
+    ...(iface.requiredInterfaces?.length ? { requiredInterfaces: [...iface.requiredInterfaces].sort() } : {}),
+  };
+}