Guard SDK sim-config staging paths

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

@@ -187,14 +187,16 @@ function simMachine(machineRel, iniFile, programFile, nativeToolTableRel) {
     resolve(vendorRoot, `configs/sim/${machineRel}/${iniFile}`),
     "utf8",
   );
+  const expectedWasmDir = `/work/sim-inventory/${machineRel}`;
   const plan = planSimConfigStaging({
     manifestText,
     machineRel,
     iniFile,
     iniText,
     programFile,
-    wasmDir: `/work/sim-inventory/${machineRel}`,
+    wasmDir: expectedWasmDir,
   });
+  assertSimConfigStagingPlan(machineRel, plan, expectedWasmDir);
   const machine = {
     ...plan,
     files: plan.files.map((file) => ({
@@ -207,6 +209,40 @@ function simMachine(machineRel, iniFile, programFile, nativeToolTableRel) {
   return withNativeToolTableFallback(machine, iniText, nativeToolTableRel);
 }
 
+function assertSimConfigStagingPlan(machineRel, plan, expectedWasmDir) {
+  assert.equal(plan.wasmDir, expectedWasmDir, `${machineRel}: sim staging root drift`);
+  assert.ok(
+    plan.iniPath.startsWith(`${expectedWasmDir}/`),
+    `${machineRel}: sim INI staging path drift`,
+  );
+  if (plan.programPath !== null) {
+    assert.ok(
+      plan.programPath.startsWith(`${expectedWasmDir}/`),
+      `${machineRel}: sim program staging path drift`,
+    );
+  }
+
+  const paths = [];
+  for (const file of plan.files) {
+    assert.equal(file.path, file.wasmPath, `${file.sourceRel}: path/wasmPath drift`);
+    assert.ok(
+      file.wasmPath.startsWith(`${expectedWasmDir}/`),
+      `${file.sourceRel}: sim file staging root drift`,
+    );
+    assert.ok(
+      file.sourceRel.startsWith("configs/sim/"),
+      `${file.sourceRel}: sim source root drift`,
+    );
+    paths.push(file.wasmPath);
+  }
+
+  assert.deepEqual(
+    paths.filter((path, index) => paths.indexOf(path) !== index),
+    [],
+    `${machineRel}: duplicate sim staging paths`,
+  );
+}
+
 function firstIniValue(iniText, section, key) {
   let activeSection = "";
   for (const rawLine of iniText.split("\n")) {