Address code review: add error handling for getLLMText and clarify includeProcessedMarkdown comment

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/site/lib/source.ts

@@ -28,10 +28,16 @@ export function getPageImage(page: InferPageType<typeof source>) {
 }
 
 export async function getLLMText(page: InferPageType<typeof source>) {
-  const processed = await page.data.getText('processed');
+  try {
+    const processed = await page.data.getText('processed');
 
-  return `# ${page.data.title}
+    return `# ${page.data.title}
 
 ${processed}`;
+  } catch {
+    return `# ${page.data.title}
+
+${page.data.description ?? ''}`;
+  }
 }
 

packages/site/source.config.ts

@@ -35,6 +35,7 @@ export const docs = defineDocs({
   docs: {
     schema: frontmatterSchema,
     postprocess: {
+      // Required for LLM text generation (getLLMText in lib/source.ts)
       includeProcessedMarkdown: true,
     },
   },