fix(landing): stabilize blog indexing workflows (#2042)

Use full workspace installs for blog indexing workflows so root postinstall can resolve workspace build dependencies, and enrich sitemap metadata for blog URLs from frontmatter dates.

Co-authored-by: ashley li <ashleyli@ashleydeMacBook-Air-2.local>
Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/blog-indexing-monitor.yml

@@ -59,8 +59,8 @@ jobs:
           node-version: 24
           cache: pnpm
 
-      - name: Install dependencies (landing-page only)
-        run: pnpm install --frozen-lockfile --filter @open-design/landing-page
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
 
       - name: Check indexing configuration
         id: config

.github/workflows/blog-indexing-on-deploy.yml

@@ -72,8 +72,8 @@ jobs:
           node-version: 24
           cache: pnpm
 
-      - name: Install dependencies (landing-page only)
-        run: pnpm install --frozen-lockfile --filter @open-design/landing-page
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
 
       - name: Check indexing configuration
         id: config

apps/landing-page/astro.config.ts

@@ -1,4 +1,6 @@
-import sitemap from '@astrojs/sitemap';
+import sitemap, { type SitemapItem } from '@astrojs/sitemap';
+import { readFileSync, readdirSync } from 'node:fs';
+import { join } from 'node:path';
 import { defineConfig } from 'astro/config';
 
 // Production canonical origin. Used by Astro for `Astro.site`, by
@@ -10,6 +12,24 @@ import { defineConfig } from 'astro/config';
 // builds (Cloudflare Pages preview deployments, local previews on a
 // different host) can stamp their own URL without forking the config.
 const site = process.env.OD_LANDING_SITE ?? 'https://open-design.ai';
+const changefreq = {
+  daily: 'daily' as SitemapItem['changefreq'],
+  weekly: 'weekly' as SitemapItem['changefreq'],
+  monthly: 'monthly' as SitemapItem['changefreq'],
+};
+
+// Read blog post dates at config time so the sitemap can include lastmod.
+const blogDir = join(import.meta.dirname, 'app/content/blog');
+const blogDates = new Map<string, string>();
+for (const file of readdirSync(blogDir)) {
+  if (!file.endsWith('.md') || file.startsWith('_')) continue;
+  const raw = readFileSync(join(blogDir, file), 'utf-8');
+  const match = raw.match(/^date:\s*(\d{4}-\d{2}-\d{2})/m);
+  if (match) {
+    const slug = file.replace(/\.md$/, '');
+    blogDates.set(`/blog/${slug}/`, match[1]!);
+  }
+}
 
 export default defineConfig({
   output: 'static',
@@ -24,6 +44,32 @@ export default defineConfig({
       // and is `Disallow`-ed from `public/robots.txt`. Filtering it
       // out of the sitemap keeps the index strictly canonical pages.
       filter: (page) => !page.includes('/og/'),
+      serialize(item: SitemapItem) {
+        const path = new URL(item.url).pathname;
+        if (path === '/') {
+          item.priority = 1.0;
+          item.changefreq = changefreq.daily;
+        } else if (path === '/blog/') {
+          item.priority = 0.9;
+          item.changefreq = changefreq.daily;
+        } else if (path.startsWith('/blog/')) {
+          item.priority = 0.8;
+          item.changefreq = changefreq.weekly;
+          const date = blogDates.get(path);
+          if (date) item.lastmod = date;
+        } else if (
+          path === '/skills/' ||
+          path === '/systems/' ||
+          path === '/craft/'
+        ) {
+          item.priority = 0.7;
+          item.changefreq = changefreq.weekly;
+        } else {
+          item.priority = 0.5;
+          item.changefreq = changefreq.monthly;
+        }
+        return item;
+      },
     }),
   ],
 });