feat(llm 對話): 新增 prompt builder 與 few-shot 範例組裝,強化 Claude 對話品質

apps/api/src/llm/few-shot-examples.ts

@@ -0,0 +1,30 @@
+import type { EmotionTag } from "@kokorone/shared";
+import { pickTemplates } from "./template-library.js";
+
+export interface FewShotExample {
+  emotionTag: EmotionTag;
+  tier: "low" | "high";
+  userInput: string;
+  response: string;
+}
+
+const SAMPLE_USER_INPUT: Record<"low" | "high", string> = {
+  low: "今天天氣真好呢。",
+  high: "謝謝你，我今天好開心！",
+};
+
+const SAMPLE_EMOTIONS: EmotionTag[] = ["CALM", "JOY", "SAD", "ALERT", "SHY", "GRUMPY"];
+
+// R-3：F-7 的 Mock 模板庫在真實 Provider 這邊轉為 few-shot 範例——同一份模板資料，
+// 從「隨機挑一句直接當回應」變成「示範這個性格原型在各種情緒下該有的語氣」。
+export function buildFewShotExamples(personalityArchetype: string): FewShotExample[] {
+  const examples: FewShotExample[] = [];
+  for (const tier of ["low", "high"] as const) {
+    for (const emotionTag of SAMPLE_EMOTIONS) {
+      const candidates = pickTemplates(personalityArchetype, emotionTag, tier);
+      if (candidates.length === 0) continue;
+      examples.push({ emotionTag, tier, userInput: SAMPLE_USER_INPUT[tier], response: candidates[0] });
+    }
+  }
+  return examples;
+}