added 260907 version of worker toolkit

worker-toolkit-flaredown/scripts/lib/notice-banner.ts

@@ -0,0 +1,13 @@
+/**
+ * Wrap a notice in a banner loud enough to survive a scrollback.
+ *
+ * Yellow only when stderr is a terminal, so piped logs stay clean.
+ */
+export function banner(message: string, headline: string): string {
+  const RULE = '#'.repeat(78);
+  const pad = ' '.repeat(Math.max(0, Math.floor((78 - headline.length) / 2)));
+
+  const body = [RULE, `${pad}${headline}`, RULE, '', message, RULE].join('\n');
+  const color = process.stderr.isTTY ? ['\u001b[33m', '\u001b[39m'] : ['', ''];
+  return `${color[0]}${body}${color[1]}`;
+}