fix: harden invalidation registry governance

scripts/test-sample-removal.ts

@@ -1,5 +1,6 @@
 import { spawnSync } from "node:child_process";
 import {
+  access,
   cp,
   mkdir,
   readFile,
@@ -14,6 +15,11 @@ const fixtureRoot = path.resolve(".tmp/reference-feature-removal");
 const pnpmCli = requireEnvironment("npm_execpath");
 const featureSource = "src/features/reference-feature";
 const featureTests = "tests/features/reference-feature";
+const commonTestPaths = [
+  "tests/unit/external-contract-runtime.test.ts",
+  "tests/unit/http-execution-v3.test.ts",
+  "tests/unit/runtime-adapters.test.ts",
+];
 const featureOwnedPaths = [
   featureSource,
   featureTests,
@@ -22,9 +28,6 @@ const featureOwnedPaths = [
   "tests/mocks",
   "tests/fixtures/typecheck/invalid-feature-input.ts",
   "tests/fixtures/typecheck/invalid-reference-operation.ts",
-  "tests/unit/external-contract-runtime.test.ts",
-  "tests/unit/http-execution-v3.test.ts",
-  "tests/unit/runtime-adapters.test.ts",
 ];
 const copyTargets = [
   "src",
@@ -314,6 +317,21 @@ for (const root of ["src", "tests"]) {
 }
 
 const checks: Array<[string, boolean]> = [
+  [
+    "common-test-evidence",
+    (
+      await Promise.all(
+        commonTestPaths.map(async (testPath) => {
+          try {
+            await access(path.join(fixtureRoot, testPath));
+            return true;
+          } catch {
+            return false;
+          }
+        }),
+      )
+    ).every(Boolean),
+  ],
   ["typecheck", runPnpm("check:types")],
   ["architecture", runPnpm("check:architecture")],
   ["registry-structure", runPnpm("check:registries:structure")],