Host checked adapter-object controllers through bounded registries (WI-13)

src/capability-language/controller-scaffold.ts

@@ -10,7 +10,8 @@ export async function scaffoldController(
   const entry = { id: spec.id, ...spec.controller };
   const fields = ["id", "subject", "snapshot", "remote", "input"];
   if (
-    Object.keys(entry).length !== fields.length ||
+    Object.keys(entry).some((key) => ![...fields, "registry"].includes(key)) ||
+    (entry.registry !== undefined && typeof entry.registry !== "string") ||
     fields.some((key) => typeof (entry as Record<string, unknown>)[key] !== "string") ||
     !["unit", "value"].includes(entry.input ?? "")
   )