Guard mixed m98m99 staging paths

wasm-port/tests/wasm/node/verify_interp_wasm.mjs

@@ -2605,6 +2605,7 @@ verifyExpectedOutput(
   ].join("\n"),
 );
 
+const m98m99MixedSubStylePaths = [];
 for (const mixedSubStyleFixture of [
   {
     name: "called_with_o_call",
@@ -2653,6 +2654,7 @@ for (const mixedSubStyleFixture of [
     "m98m99/06-error-mixed-sub-styles",
     mixedSubStyleFixture.file,
   );
+  m98m99MixedSubStylePaths.push(mixedSubStylePath);
   const mixedSubStyleRun = runWithCapturedPrints(() => interp.runFile(mixedSubStylePath));
   verifyExpectedOutput(
     `interp_m98m99_06_${mixedSubStyleFixture.name}_wasm`,
@@ -2677,6 +2679,17 @@ for (const mixedSubStyleFixture of [
     );
   }
 }
+assert.deepEqual(
+  [
+    m98m99M98ButNoSubPath,
+    m98m99M98LoopsPath,
+    ...m98m99MixedSubStylePaths,
+  ],
+  m98m99RegressionFiles
+    .slice(3, 9)
+    .map((file) => `/work/interp/m98m99/${file}`),
+  "interp m98m99 mixed direct-file staging manifest drift",
+);
 
 const m98m99NestedSubsPath = writeInterpRegressionFile("m98m99/07-nested-subs", "test.ngc");
 const m98m99NestedSubsRun = runWithCapturedPrints(() => interp.runFile(m98m99NestedSubsPath));