feat: use llm for article optimization

src/lib/workflow/article-optimizer.ts

@@ -4,6 +4,11 @@ import type {
   OptimizedArticle,
 } from "../domain/types";
 import { optimizedArticleSchema } from "../domain/validation";
+import { generateValidatedJson } from "../llm/client";
+import {
+  ARTICLE_OPTIMIZER_SYSTEM_PROMPT,
+  buildArticleOptimizerPrompt,
+} from "../llm/prompts";
 
 export interface OptimizeArticleInput {
   input: ArticleInput;
@@ -14,6 +19,20 @@ export async function optimizeArticle({
   input,
   factCard,
 }: OptimizeArticleInput): Promise<OptimizedArticle> {
+  const llmArticle = await generateValidatedJson({
+    schema: optimizedArticleSchema,
+    system: ARTICLE_OPTIMIZER_SYSTEM_PROMPT,
+    prompt: buildArticleOptimizerPrompt(input, factCard),
+    temperature: 0.2,
+  });
+
+  return llmArticle ?? optimizeArticleFallback({ input, factCard });
+}
+
+function optimizeArticleFallback({
+  input,
+  factCard,
+}: OptimizeArticleInput): OptimizedArticle {
   const unsupported = findUnsupportedInstructionClaims(
     input.user_instructions,
     factCard,