feat(engine): auto-select art style via parallel LLM call

When user picks "自动", the client sends styleGuide="auto" to the server. The orchestrator then runs a lightweight style-selector LLM call in parallel with the Architect — both only depend on worldSetting, so there is zero added latency. The selector picks the best-matching preset from STYLE_MAP based on genre, mood, and setting. Also moves STYLE_MAP from page.tsx to lib/options.ts so it can be shared between client and server. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-06-06 22:08:08 +08:00
parent 5fab22b9d5
commit 585f302908
4 changed files with 83 additions and 33 deletions
@@ -0,0 +1,37 @@
+import { chat } from "@infiplot/ai-client";
+import type { ProviderConfig } from "@infiplot/types";
+import { STYLE_MAP } from "@/lib/options";
+
+const STYLE_NAMES = Object.keys(STYLE_MAP);
+
+const SYSTEM = `You are an art director for a visual novel. Given the story premise, pick the single best-matching art style from the list below. Consider the genre, mood, setting, and target audience.
+
+Available styles:
+${STYLE_NAMES.map((s) => `- ${s}`).join("\n")}
+
+Reply with ONLY the style name, nothing else. If uncertain, default to 吉卜力.`;
+
+export async function selectStyle(
+  textConfig: ProviderConfig,
+  worldSetting: string,
+): Promise<string> {
+  const result = await chat(
+    textConfig,
+    [
+      { role: "system", content: SYSTEM },
+      { role: "user", content: worldSetting },
+    ],
+    { temperature: 0, tag: "styleSelector" },
+  );
+
+  const picked = result.trim();
+  if (STYLE_MAP[picked]) {
+    return STYLE_MAP[picked];
+  }
+  const fuzzy = STYLE_NAMES.find((s) => picked.includes(s) || s.includes(picked));
+  if (fuzzy) {
+    return STYLE_MAP[fuzzy]!;
+  }
+  console.warn(`[styleSelector] unrecognized style "${picked}", falling back to 吉卜力`);
+  return STYLE_MAP["吉卜力"]!;
+}