docs: Consolidate trailing-slash URL duplicates

docs/site/middleware.js

@@ -3,6 +3,23 @@
 
 const AI_AGENT_PATTERN = /claude[-_]?code|anthropic|cursor|copilot|chatgpt|openai|gptbot|perplexity|cohere|codeium|windsurf|tabnine|sourcegraph|cody/i;
 
+// Trailing-slash duplicates split pageview counts and dilute SEO signals across
+// two URLs for the same page. Redirect the trailing-slash variants to their
+// canonical (non-trailing-slash) paths so analytics and search engines see one.
+const TRAILING_SLASH_REDIRECTS = new Map([
+	['/Pricing/', '/Pricing'],
+	['/UsingSeal/', '/UsingSeal'],
+	['/GettingStarted/', '/GettingStarted'],
+]);
+
+function resolveRedirect(request) {
+	const url = new URL(request.url);
+	const canonical = TRAILING_SLASH_REDIRECTS.get(url.pathname);
+	if (!canonical) return null;
+	url.pathname = canonical;
+	return url.toString();
+}
+
 function detectServerVisitorType(request) {
 	const ua = request.headers.get('user-agent') || '';
 	const accept = request.headers.get('accept') || '';
@@ -40,6 +57,13 @@ export const config = {
 };
 
 export default async function middleware(request) {
+	// Consolidate trailing-slash duplicates before any tracking so the pageview
+	// is attributed to the canonical URL rather than the redirected one.
+	const redirectTo = resolveRedirect(request);
+	if (redirectTo) {
+		return Response.redirect(redirectTo, 301);
+	}
+
 	const visitorType = detectServerVisitorType(request);
 	if (visitorType === 'agent') {
 		trackPlausibleEvent(request, visitorType);

docs/site/src/shared/js/serve-with-rewrites.js

@@ -33,6 +33,15 @@ const MIME_TYPES = {
   '.pdf': 'application/pdf',
 };
 
+// Trailing-slash duplicates split analytics and dilute SEO across two URLs for
+// the same page. Redirect the trailing-slash variants to their canonical
+// (non-trailing-slash) paths, mirroring the production edge middleware.
+const TRAILING_SLASH_REDIRECTS = {
+  '/Pricing/': '/Pricing',
+  '/UsingSeal/': '/UsingSeal',
+  '/GettingStarted/': '/GettingStarted',
+};
+
 function getContentType(filePath) {
   const ext = path.extname(filePath).toLowerCase();
   return MIME_TYPES[ext] || 'application/octet-stream';
@@ -83,6 +92,15 @@ const server = http.createServer((req, res) => {
   const parsedUrl = url.parse(req.url);
   let pathname = parsedUrl.pathname;
 
+  // Consolidate trailing-slash duplicates onto their canonical paths.
+  const canonical = TRAILING_SLASH_REDIRECTS[pathname];
+  if (canonical) {
+    const location = parsedUrl.search ? canonical + parsedUrl.search : canonical;
+    res.writeHead(301, { Location: location });
+    res.end();
+    return;
+  }
+
   // Content negotiation: serve markdown when Accept: text/markdown
   if (acceptsMarkdown(req)) {
     const mdFile = resolveMarkdownFile(pathname);