[WRONG BRANCH] fix(ci): reject renamed-away tests as regression coverage

.github/scripts/pr-hygiene.cjs

@@ -143,8 +143,10 @@ function assessHygiene({ files = [], labels = [] }) {
   const behaviorChanged = allPaths.some(
     (path) => isBehaviorPath(path) && !commentOnlyPaths.has(path),
   );
-  // Deleted tests add no coverage and must not satisfy the regression gate.
-  const testsChanged = allPaths.some(
+  // Deleted or renamed-away tests add no coverage and must not satisfy the
+  // regression gate. Previous paths still classify behavior and generated
+  // files above, but only a current test path counts as regression coverage.
+  const testsChanged = filenames.some(
     (path) => isTestPath(path) && !removedFilenames.has(path),
   );
 

.github/scripts/pr-hygiene.test.cjs

@@ -186,6 +186,19 @@ describe("assessHygiene", () => {
     assert.equal(failures[0].code, "missing_regression_test");
   });
 
+  it("does not count renamed-away tests as regression coverage", () => {
+    const failures = assessHygiene({ files: [
+      { filename: "src/router.ts", patch: "+change" },
+      {
+        filename: "docs/router.md",
+        previous_filename: "tests/router.test.ts",
+        status: "renamed",
+        patch: "",
+      },
+    ] });
+    assert.equal(failures[0].code, "missing_regression_test");
+  });
+
   it("allows maintainer-approved narrow exceptions", () => {
     const failures = assessHygiene({
       files: [