fix(build): preserve native generated-file line endings

Treat CRLF and LF as equivalent when checking committed text artifacts so Windows package lifecycles do not report false drift.

When real generated content changes, retain the existing artifact's line-ending convention and cover both check and update behavior with a focused regression test.

scripts/lib/generated-file.mjs

@@ -6,6 +6,13 @@ const isMissing = (cause) =>
   "code" in cause &&
   cause.code === "ENOENT";
 
+const normalizeLineEndings = (value) => value.replaceAll("\r\n", "\n");
+
+const preserveLineEndings = (source, existing) =>
+  existing?.includes("\r\n") === true
+    ? normalizeLineEndings(source).replaceAll("\n", "\r\n")
+    : source;
+
 /** Compare or update one generated text artifact with actionable diagnostics. */
 export const ensureGeneratedFile = async ({
   path,
@@ -19,11 +26,15 @@ export const ensureGeneratedFile = async ({
   } catch (cause) {
     if (!isMissing(cause)) throw cause;
   }
-  if (existing === source) return { changed: false };
+  if (
+    existing !== undefined &&
+    normalizeLineEndings(existing) === normalizeLineEndings(source)
+  )
+    return { changed: false };
   if (check)
     throw new Error(
       `${path} is missing or stale. Run \`${generateCommand}\` and commit the result.`,
     );
-  await writeFile(path, source, "utf8");
+  await writeFile(path, preserveLineEndings(source, existing), "utf8");
   return { changed: true };
 };

tests/productCatalog.test.ts

@@ -234,4 +234,29 @@ describe("canonical product catalog", () => {
     ).resolves.toEqual({ changed: true });
     expect(await readFile(path, "utf8")).toBe("current\n");
   });
+
+  it("accepts and preserves native generated-file line endings", async () => {
+    const directory = await mkdtemp(join(tmpdir(), "rea-generated-eol-"));
+    temporaryRoots.push(directory);
+    const path = join(directory, "catalog.json");
+    await writeFile(path, "current\r\n", "utf8");
+    await expect(
+      ensureGeneratedFile({
+        path,
+        source: "current\n",
+        check: true,
+        generateCommand: "npm run docs:generate",
+      }),
+    ).resolves.toEqual({ changed: false });
+    expect(await readFile(path, "utf8")).toBe("current\r\n");
+    await expect(
+      ensureGeneratedFile({
+        path,
+        source: "updated\n",
+        check: false,
+        generateCommand: "npm run docs:generate",
+      }),
+    ).resolves.toEqual({ changed: true });
+    expect(await readFile(path, "utf8")).toBe("updated\r\n");
+  });
 });