diff --git a/src/context-engine/legacy.registration.ts b/src/context-engine/legacy.registration.ts
index e7e414421e1..3bd131114be 100644
--- a/src/context-engine/legacy.registration.ts
+++ b/src/context-engine/legacy.registration.ts
@@ -1,21 +1,20 @@
 import { registerContextEngineForOwner } from "./registry.js";
 import type { ContextEngine } from "./types.js";
 
-const LEGACY_CONTEXT_ENGINE_CANDIDATES = ["./legacy.js", "./legacy.ts"] as const;
-
 type LegacyContextEngineModule = {
   LegacyContextEngine: new () => ContextEngine;
 };
 
 async function loadLegacyContextEngineModule(): Promise<LegacyContextEngineModule> {
-  for (const candidate of LEGACY_CONTEXT_ENGINE_CANDIDATES) {
+  try {
+    return (await import("./legacy.js")) as LegacyContextEngineModule;
+  } catch {
     try {
-      return (await import(candidate)) as LegacyContextEngineModule;
+      return (await import("./legacy.ts")) as LegacyContextEngineModule;
     } catch {
-      // Try runtime/source candidates in order.
+      throw new Error("Failed to load legacy context engine runtime.");
     }
   }
-  throw new Error("Failed to load legacy context engine runtime.");
 }
 
 export function registerLegacyContextEngine(): void {