Enhance blog metadata and SEO with structured Open Graph data; add sitemap and robots.txt functionality; replace default OG image.

app/layout.tsx

@@ -21,8 +21,30 @@ const frutiger = localFont({
 });
 
 export const metadata: Metadata = {
+  metadataBase: new URL("https://blog.gabrielkaszewski.dev"),
+  title: {
+    default: "Gabriel Kaszewski's Blog",
+    template: `%s | Gabriel's Kaszewski Blog`,
+  },
+  description:
+    "A personal blog by Gabriel Kaszewski about technology, programming, and game development.",
+  openGraph: {
     title: "Gabriel Kaszewski's Blog",
-  description: "A personal blog by Gabriel Kaszewski",
+    description:
+      "A personal blog about technology, programming, and game development.",
+    url: "https://blog.gabrielkaszewski.dev",
+    siteName: "Gabriel Kaszewski's Blog",
+    locale: "en_US",
+    type: "website",
+    images: [
+      {
+        url: "/default-og-image.avif",
+        width: 1200,
+        height: 630,
+        alt: "Gabriel Kaszewski's Blog",
+      },
+    ],
+  },
 };
 
 export default function RootLayout({

app/robots.tsx

@@ -0,0 +1,15 @@
+import { MetadataRoute } from "next";
+
+export default function robots(): MetadataRoute.Robots {
+  const baseUrl = "https://blog.gabrielkaszewski.dev";
+
+  return {
+    rules: [
+      {
+        userAgent: "*",
+        allow: "/",
+      },
+    ],
+    sitemap: `${baseUrl}/sitemap.xml`,
+  };
+}

app/sitemap.tsx

@@ -0,0 +1,26 @@
+import { MetadataRoute } from "next";
+import { getSortedPostsData } from "@/lib/posts";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  const baseUrl = "https://blog.gabrielkaszewski.dev";
+
+  const posts = getSortedPostsData();
+
+  const postUrls = posts.map((post) => ({
+    url: `${baseUrl}/${post.id}`,
+    lastModified: new Date(post.date).toISOString(),
+    changeFrequency: "monthly" as const,
+    priority: 0.8,
+  }));
+
+  const staticUrls = [
+    {
+      url: baseUrl,
+      lastModified: new Date().toISOString(),
+      changeFrequency: "weekly" as const,
+      priority: 1.0,
+    },
+  ];
+
+  return [...staticUrls, ...postUrls];
+}