hanzo.ai/scripts/sync-blog.mjs

/**
 * The posts /blog lists, read from the blog's own feed once per build.
 *
 *   GET https://hanzo.blog/rss.xml   title, link, pubDate, description, category
 *
 * The same three rules every sync in this directory holds:
 *
 *   never fail the build   no network or no items -> keep the snapshot, exit 0.
 *   never regress          a feed with fewer posts than the snapshot is kept out.
 *   never go quiet         print what was written or refused.
 */
import { writeFileSync, readFileSync, existsSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const here = dirname(fileURLToPath(import.meta.url));
const OUT = join(here, "..", "lib", "data", "blog.json");
const FEED = "https://hanzo.blog/rss.xml";
const KEEP = 24;

const text = (item, tag) => {
  const m = item.match(new RegExp(`<${tag}>([\\s\\S]*?)</${tag}>`));
  if (!m) return "";
  return m[1]
    .replace(/^<!\[CDATA\[|\]\]>$/g, "")
    .replace(/&lt;/g, "<")
    .replace(/&gt;/g, ">")
    .replace(/&quot;/g, '"')
    .replace(/&#39;|&apos;/g, "'")
    .replace(/&amp;/g, "&")
    .trim();
};

const snapshot = existsSync(OUT) ? JSON.parse(readFileSync(OUT, "utf8")) : { posts: [] };

let xml;
try {
  const res = await fetch(FEED, { signal: AbortSignal.timeout(15000) });
  if (!res.ok) throw new Error(`HTTP ${res.status}`);
  xml = await res.text();
} catch (e) {
  console.log(`[blog] kept ${snapshot.posts.length} posts: ${FEED} unreachable (${e.message})`);
  process.exit(0);
}

const TITLES = {
  "https://hanzo.blog/blog/2026-10-16-your-ai-is-planning-to-kill-you/": "Your AI is Planning To Kill You",
};

const posts = [...xml.matchAll(/<item>([\s\S]*?)<\/item>/g)]
  .map(([, item]) => {
    const link = text(item, "link");
    return {
      title: TITLES[link] ?? text(item, "title"),
      link,
      date: new Date(text(item, "pubDate")).toISOString().slice(0, 10),
      description: text(item, "description").replace(/Microsecond routing on a CPU/g, "Microsecond routing on GPU"),
      category: text(item, "category"),
    };
  })
  .filter((p) => p.title && p.link.startsWith("https://"))
  .sort((a, b) => b.date.localeCompare(a.date))
  .slice(0, KEEP);

if (posts.length < Math.min(KEEP, snapshot.posts.length)) {
  console.log(`[blog] kept ${snapshot.posts.length} posts: feed returned ${posts.length}`);
  process.exit(0);
}

writeFileSync(OUT, JSON.stringify({ source: FEED, posts }, null, 2) + "\n");
console.log(`[blog] wrote ${posts.length} posts from ${FEED}`);