feat: default new Codex agents to the qualified Paperclip Runner

Resolve creation intent across onboarding, hires, imports, and the UI. Preserve existing execution and qualify automatic defaults for shipped Linux x64 artifacts.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/adapters/registry.ts

@@ -483,9 +483,11 @@ const paperclipRunnerAdapter: ServerAdapterModule = {
         }],
       };
     }
-    const result = profile.provider === "opencode"
-      ? await openCodeTestEnvironment(context)
-      : await codexTestEnvironment(context);
+    if (profile.provider === "codex") {
+      const { testNativeRunnerAuthentication } = await import("../services/native-runtime/setup-readiness.js");
+      return testNativeRunnerAuthentication(context, "codex", profile.model);
+    }
+    const result = await openCodeTestEnvironment(context);
     return { ...result, adapterType: "paperclip_runner" };
   },
   listSkills: listCodexSkills,
@@ -1177,6 +1179,12 @@ export function isOverridePaused(type: string): boolean {
   return pausedOverrides.has(type);
 }
 
+export function hasActiveAdapterOverride(type: string): boolean {
+  const registered = adaptersByType.get(type);
+  return builtinFallbacks.has(type) && registered !== undefined
+    && registered !== builtinFallbacks.get(type) && !pausedOverrides.has(type);
+}
+
 /** Get the set of types whose overrides are currently paused. */
 export function getPausedOverrides(): Set<string> {
   return pausedOverrides;