Added a badge to display the monthly ramp

scripts/write-output.cjs

@@ -0,0 +1,20 @@
+const fs = require("node:fs/promises");
+const { randomUUID } = require("node:crypto");
+
+async function writeOutput(file, contents, io = fs) {
+  try {
+    if (await io.readFile(file, "utf8") === contents) return;
+  } catch (error) {
+    if (error.code !== "ENOENT") throw error;
+  }
+  // Replace a complete file; never remove or truncate a script the browser may load.
+  const temporary = `${file}.${randomUUID()}.tmp`;
+  try {
+    await io.writeFile(temporary, contents, { encoding: "utf8", flag: "wx" });
+    await io.rename(temporary, file);
+  } finally {
+    await io.rm(temporary, { force: true });
+  }
+}
+
+module.exports = { writeOutput };