feat: adopt docs.prose.md as the canonical docs domain

__tests__/canonical.test.ts

@@ -7,19 +7,19 @@ import {
 
 describe("canonicalUrl", () => {
   it("returns the absolute URL for the root path", () => {
-    expect(canonicalUrl("/")).toBe("https://docs.openprose.ai/");
+    expect(canonicalUrl("/")).toBe("https://docs.prose.md/");
   });
 
   it("returns the absolute URL for a nested path", () => {
     expect(canonicalUrl("/get-started/install")).toBe(
-      "https://docs.openprose.ai/get-started/install",
+      "https://docs.prose.md/get-started/install",
     );
   });
 
-  it("ignores the runtime hostname (always pins to docs.openprose.ai)", () => {
+  it("ignores the runtime hostname (always pins to docs.prose.md)", () => {
     // Regression: even when running on openprose-docs.fly.dev during preview,
-    // canonical must point to docs.openprose.ai per spec Section 6.
-    expect(canonicalUrl("/foo")).toContain("docs.openprose.ai");
+    // canonical must point to docs.prose.md per spec Section 6.
+    expect(canonicalUrl("/foo")).toContain("docs.prose.md");
     expect(canonicalUrl("/foo")).not.toContain("fly.dev");
   });
 });
@@ -40,7 +40,7 @@ describe("buildPageMetadata", () => {
   it("emits absolute canonical URL for a nested docs path", () => {
     const md = buildPageMetadata("/docs/get-started/install");
     expect(md.alternates?.canonical).toBe(
-      "https://docs.openprose.ai/docs/get-started/install",
+      "https://docs.prose.md/docs/get-started/install",
     );
   });
 

__tests__/proxy.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from 'vitest';
+import { resolveDocsHostRedirect } from '../proxy';
+
+describe('resolveDocsHostRedirect', () => {
+  it('redirects the legacy docs host to docs.prose.md', () => {
+    expect(resolveDocsHostRedirect('docs.openprose.ai', '/foo?x=1')).toBe(
+      'https://docs.prose.md/foo?x=1',
+    );
+  });
+
+  it('ignores the canonical docs host', () => {
+    expect(resolveDocsHostRedirect('docs.prose.md', '/foo?x=1')).toBeNull();
+  });
+
+  it('ignores the Fly preview host', () => {
+    expect(
+      resolveDocsHostRedirect('openprose-docs.fly.dev', '/foo?x=1'),
+    ).toBeNull();
+  });
+});

__tests__/robots.test.ts

@@ -28,6 +28,6 @@ describe("app/robots.ts", () => {
       allow: "/",
     });
     expect(config.rules).toContainEqual({ userAgent: "CCBot", allow: "/" });
-    expect(config.sitemap).toBe("https://docs.openprose.ai/sitemap.xml");
+    expect(config.sitemap).toBe("https://docs.prose.md/sitemap.xml");
   });
 });

lib/canonical.ts

@@ -4,7 +4,7 @@ import { isPreviewMode } from "./preview-mode";
 
 /**
  * Returns the absolute canonical URL for a docs path. The path argument
- * MUST start with '/'. We pin the host to docs.openprose.ai regardless of
+ * MUST start with '/'. We pin the host to docs.prose.md regardless of
  * the actual runtime hostname, so preview deploys at openprose-docs.fly.dev
  * still emit the production canonical (preventing split-indexing on cutover).
  */

lib/site.ts

@@ -1,3 +1,3 @@
 export const SITE = {
-  canonicalBaseUrl: "https://docs.openprose.ai",
+  canonicalBaseUrl: "https://docs.prose.md",
 } as const;

package.json

@@ -8,7 +8,7 @@
     "type": "git",
     "url": "https://github.com/openprose/docs.git"
   },
-  "homepage": "https://docs.openprose.ai",
+  "homepage": "https://docs.prose.md",
   "packageManager": "pnpm@10.11.0",
   "scripts": {
     "postinstall": "fumadocs-mdx",

proxy.ts

@@ -11,7 +11,27 @@ const { rewrite: rewriteSuffix } = rewritePath(
   `${docsContentRoute}{/*path}/content.md`,
 );
 
+export function resolveDocsHostRedirect(
+  host: string,
+  pathWithSearch: string,
+): string | null {
+  const hostname = host.split(':')[0];
+
+  if (hostname !== 'docs.openprose.ai') return null;
+
+  return `https://docs.prose.md${pathWithSearch}`;
+}
+
 export default function proxy(request: NextRequest) {
+  const hostRedirect = resolveDocsHostRedirect(
+    request.headers.get('host') ?? '',
+    `${request.nextUrl.pathname}${request.nextUrl.search}`,
+  );
+
+  if (hostRedirect) {
+    return NextResponse.redirect(hostRedirect, 301);
+  }
+
   const result = rewriteSuffix(request.nextUrl.pathname);
   if (result) {
     return NextResponse.rewrite(new URL(result, request.nextUrl));