feat: add llms-full txt link in llmstxt

Author: uniyalabhishek

src/plugins/llms/generator.ts

@@ -328,21 +328,28 @@ async function writeLlmsTxt(params: GeneratorParams): Promise<void> {
   const optionalSidebars = params.orderedSidebars.filter((name) =>
     optionalSet.has(name),
   );
-  if (optionalSidebars.length) {
-    lines.push('## Optional', '');
-    for (const sidebarName of optionalSidebars) {
-      const items = params.docsSidebars[sidebarName];
-      if (!Array.isArray(items) || !items.length) continue;
-
-      const flatEntries = collectFlatDocEntries(items, params.docsById);
-      for (const entry of flatEntries) {
-        lines.push(
-          buildFlatDocLine(entry, params.siteBase, params.maxDescriptionLength),
-        );
-      }
+
+  // Always include Optional section with llms-full.txt reference (like ElizaOS)
+  lines.push('## Optional', '');
+  if (params.siteBase) {
+    const llmsFullUrl = joinUrl(params.siteBase, params.llmsFullTxtFilename);
+    lines.push(`- [Docs for LLMs](${llmsFullUrl})`);
+  } else {
+    lines.push(`- [Docs for LLMs](/${params.llmsFullTxtFilename})`);
+  }
+
+  for (const sidebarName of optionalSidebars) {
+    const items = params.docsSidebars[sidebarName];
+    if (!Array.isArray(items) || !items.length) continue;
+
+    const flatEntries = collectFlatDocEntries(items, params.docsById);
+    for (const entry of flatEntries) {
+      lines.push(
+        buildFlatDocLine(entry, params.siteBase, params.maxDescriptionLength),
+      );
     }
-    lines.push('');
   }
+  lines.push('');
 
   await fsp.writeFile(
     path.join(params.outDir, params.llmsTxtFilename),