feat(web): link to the other OpenCore sites from the footer

apps/web/src/components/home/home-footer.tsx

@@ -2,6 +2,7 @@ import { Link } from "@tanstack/react-router";
 
 import AmendLogo from "@/components/amend-logo";
 import { docsUrl } from "@/lib/docs-url";
+import { otherOpenCoreSites } from "@/lib/opencore-sites";
 
 import { BrandIcon, type BrandName } from "./brand-icons";
 
@@ -12,6 +13,9 @@ const SOCIAL: { name: BrandName; label: string; href: string }[] = [
   { name: "x", label: "X", href: "https://x.com/amend_sh" },
 ];
 
+// Plain followed links on purpose: they share authority between our sites.
+const OPENCORE_LINKS = otherOpenCoreSites("https://amend.sh");
+
 export function Footer() {
   return (
     <section className="relative z-10 overflow-hidden border-t border-border">
@@ -115,6 +119,30 @@ export function Footer() {
           />
         </div>
 
+        <nav
+          aria-labelledby="footer-opencore-label"
+          className="grid gap-5 border-t border-border py-10"
+        >
+          <span
+            id="footer-opencore-label"
+            className="amend-mono text-xs uppercase tracking-[0.16em] text-foreground"
+          >
+            More from OpenCore
+          </span>
+          <ul className="grid gap-x-8 gap-y-3 sm:grid-cols-2 lg:grid-cols-4">
+            {OPENCORE_LINKS.map((site) => (
+              <li key={site.url}>
+                <a
+                  href={site.url}
+                  className="text-sm text-muted-foreground transition-colors duration-150 ease-linear hover:text-foreground"
+                >
+                  <span className="text-foreground/90">{site.name}</span> {site.description}
+                </a>
+              </li>
+            ))}
+          </ul>
+        </nav>
+
         {/* Bottom bar */}
         <div className="flex flex-col gap-3 border-t border-border py-7 text-xs text-muted-foreground sm:flex-row sm:items-center sm:justify-between">
           <span className="amend-mono">© 2026 amend.sh</span>

apps/web/src/lib/opencore-sites.ts

@@ -0,0 +1,61 @@
+// Leo's public sites, linked from the footer of each one. Every repo keeps an
+// identical copy of this list, so update all of them together. URLs are the
+// exact origin each site serves (some redirect apex to www), and the links stay
+// plain followed links on purpose.
+
+export interface OpenCoreSite {
+  readonly name: string;
+  readonly description: string;
+  readonly url: string;
+}
+
+export const OPENCORE_SITES = [
+  {
+    name: "Social SDK",
+    description: "TypeScript SDK for social APIs",
+    url: "https://social-sdk.dev",
+  },
+  { name: "Email SDK", description: "Email for TypeScript apps", url: "https://email-sdk.dev" },
+  {
+    name: "Domain SDK",
+    description: "Custom domains for TypeScript",
+    url: "https://www.domain-sdk.dev",
+  },
+  { name: "SMS SDK", description: "One SDK for SMS providers", url: "https://www.sms-sdk.com" },
+  {
+    name: "Sandbox SDK",
+    description: "One SDK for cloud sandboxes",
+    url: "https://sandbox-sdk.app",
+  },
+  {
+    name: "Login with ChatGPT",
+    description: "ChatGPT sign-in for your app",
+    url: "https://loginwithchatgpt.dev",
+  },
+  {
+    name: "gradients.sh",
+    description: "Animated gradients for React",
+    url: "https://gradients.sh",
+  },
+  { name: "dithercn", description: "Dither effects for your app", url: "https://dithercn.dev" },
+  { name: "BG0", description: "Background removal on your device", url: "https://bg0.dev" },
+  { name: "convt", description: "File conversion on your computer", url: "https://convt.app" },
+  { name: "Amend", description: "Close the loop on user requests", url: "https://amend.sh" },
+  {
+    name: "agentdrop",
+    description: "Instant links for agent output",
+    url: "https://www.agent-drop.co",
+  },
+  {
+    name: "Akeru Bot",
+    description: "Open-source desktop app for Grok bots",
+    url: "https://www.akeru-bot.com",
+  },
+  { name: "Leo", description: "The developer behind OpenCore", url: "https://leodev.cv" },
+] as const satisfies readonly OpenCoreSite[];
+
+export type OpenCoreSiteUrl = (typeof OPENCORE_SITES)[number]["url"];
+
+/** Every site except the one rendering the footer. */
+export const otherOpenCoreSites = (current: OpenCoreSiteUrl): readonly OpenCoreSite[] =>
+  OPENCORE_SITES.filter((site) => site.url !== current);