Add preamble with curl instructions and cross-links to llms.txt routes

Adds context for AI agents consuming the llms.txt endpoints:
- Superwall product description (top-level only)
- Instructions for fetching .md markdown mirrors with curl -sL
- Platform-specific doc links and cross-section navigation
- Title header for llms-full.txt output

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Lever

src/lib/llms.ts

@@ -56,11 +56,65 @@ export function getPagesForLLMSection(pages: LLMPageLike[], section?: string) {
   );
 }
 
+function getExamplePathForSection(section: string): string {
+  const examples: Record<string, string> = {
+    ios: "/docs/ios/guides/advanced/game-controller-support.md",
+    android: "/docs/android/guides/advanced/game-controller-support.md",
+    flutter: "/docs/flutter/guides/advanced/game-controller-support.md",
+    expo: "/docs/expo/guides/advanced/game-controller-support.md",
+    "react-native": "/docs/react-native/guides/advanced/game-controller-support.md",
+    dashboard: "/docs/dashboard/dashboard-settings/overview-settings-apple-search-ads.md",
+    integrations: "/docs/integrations/amplitude.md",
+    "web-checkout": "/docs/web-checkout/overview.md",
+  };
+  return examples[section] ?? "/docs/android/guides/advanced/game-controller-support.md";
+}
+
 export function buildLLMSummaryTextFromPages(pages: LLMPageLike[], section?: string) {
   const config = getLLMSectionConfig(section);
-  const title = config ? `${config.label} Documentation` : "Documentation";
+  const title = config ? `${config.label} Documentation` : "Superwall Documentation";
   const lines: string[] = [`# ${title}`, ""];
 
+  // Add Superwall description
+  lines.push(
+    "Superwall is a platform for remotely configuring and A/B testing mobile app paywalls — no app update required. It provides SDKs for iOS, Android, Flutter, Expo, and React Native, plus a dashboard for managing paywall presentation, experiments, and subscription analytics.",
+    "",
+  );
+
+  // Add markdown mirror instructions
+  const examplePath = config
+    ? getExamplePathForSection(section!)
+    : "/docs/android/guides/advanced/game-controller-support.md";
+  lines.push(
+    "Curl the pages below to read docs for each page. You can request markdown files by appending .md to a route, for example:",
+    "",
+    `- https://superwall.com${examplePath}`,
+    "",
+    "Note: Doc URLs return a 307 redirect. Always use `curl -sL` (follow redirects) when fetching them.",
+    "",
+  );
+
+  // Add links to all sections
+  if (!config) {
+    // Top-level: list all platform-specific docs
+    lines.push("## Platform-specific docs", "");
+    for (const [key, val] of Object.entries(llmsSectionConfigs)) {
+      lines.push(`- [${val.label} Documentation](/docs/llms-${key}.txt)`);
+    }
+    lines.push("", "## All Pages", "");
+  } else {
+    // Section-specific: link back to top-level + list other sections
+    lines.push("## Other sections", "");
+    lines.push("- [All Documentation](/docs/llms.txt)");
+    for (const [key, val] of Object.entries(llmsSectionConfigs)) {
+      if (key !== section) {
+        lines.push(`- [${val.label} Documentation](/docs/llms-${key}.txt)`);
+      }
+    }
+    lines.push("");
+  }
+
+  // Page listing
   for (const page of getPagesForLLMSection(pages, section)) {
     const description = page.data.description ? `: ${page.data.description}` : "";
     lines.push(`- [${page.data.title}](${page.url})${description}`);
@@ -75,9 +129,13 @@ export async function buildLLMSummaryText(section?: string) {
 }
 
 export async function buildLLMFullText(section?: string) {
+  const config = getLLMSectionConfig(section);
+  const title = config ? `${config.label} Documentation` : "Superwall Documentation";
   const { source, getLLMText } = await import("@/lib/source");
-  const scanned = await Promise.all(getPagesForLLMSection(source.getPages(), section).map(getLLMText));
-  return scanned.join("\n\n");
+  const scanned = await Promise.all(
+    getPagesForLLMSection(source.getPages(), section).map(getLLMText),
+  );
+  return `# ${title}\n\n${scanned.join("\n\n")}`;
 }
 
 export function buildLLMResponse(body: string) {