feat: 自适应支线插入引擎（WIP：scoring/branching 抽取、挂点重定向、10 条支线 JSON、决策落库）

src/engine/scoring.ts

@@ -0,0 +1,64 @@
+import type { StoryEvent } from './eventStore';
+import type { JevClient } from '../services/jev';
+
+export const PROFILE_DIMENSIONS = [
+  { id: 'attachment', label: '依恋类型', description: '你在亲密与分离面前的姿态' },
+  { id: 'conflict_style', label: '冲突处理风格', description: '分歧当前，你先做什么' },
+  { id: 'values', label: '价值观与人生优先级', description: '两体面或两难堪之间，你让什么先走' },
+  { id: 'emotional_stability', label: '情绪稳定性', description: '突发与悔恨面前的波形' },
+  { id: 'risk', label: '风险偏好', description: '稳妥落点与精确落点之间的你' },
+  { id: 'culture', label: '文化底蕴', description: '碑文、星象与礼制，实测而非自报' },
+  { id: 'mate_preference', label: '择偶偏好', description: '你信任谁、把后背交给谁' },
+] as const;
+
+export type ProfileDimension = (typeof PROFILE_DIMENSIONS)[number]['id'];
+export interface DimensionScore {
+  id: ProfileDimension;
+  label: string;
+  score: number;
+  max: number;
+  confidence: number;
+}
+export type Confidences = Partial<Record<ProfileDimension, number>>;
+
+/** 身份与同意不是人格证据；路由标记只说明采样路径，不作为性格结论。 */
+export function buildState(events: StoryEvent[]): string {
+  const lines = events.flatMap((e) => {
+    if (e.pointId === 'C3-02') return [];
+    const prefix = `[轨迹 ${e.sessionId} / ${e.pointId}]`;
+    switch (e.kind) {
+      case 'choice':
+        return [`${prefix} 选择「${e.optionLabel}」（维度: ${e.dimensions.join('/')}）` +
+          (e.behavior ? ` 行为: ${JSON.stringify(e.behavior)}` : '')];
+      case 'narration':
+        return [`${prefix} ${e.transcript === null ? '沉默' : `讲述: ${e.transcript}`} 情绪签名: ${e.emotionSignature ?? '未知'}`];
+      case 'followup': return [`${prefix} 追问(${e.followUpDimension})回答: ${e.transcript}`];
+      case 'followup_skipped': return [`${prefix} 追问(${e.followUpDimension})回答: 记不清了（跳过）`];
+      case 'branch_inserted': return [`${prefix} 采样路径: ${e.branchId}，补测 ${e.dimensions.join('/')}，触发置信度 ${e.confidence}（不是行为证据）`];
+      case 'evidence_insufficient': return [`${prefix} 路由标记: ${e.dimensions.join('/')} 证据不足（不是性格结论）`];
+      default: return [];
+    }
+  });
+  return `用户在互动剧情《苍梧疑冢》第一幕中的行为轨迹（按时间排序，轨迹分开比较）。支线与主线同等采样；结论不一致也是信号，不回滚。沉默、跳过和使用提示不等于低人格水平。路径标记不可当作行为证据：\n${lines.join('\n')}`;
+}
+
+export async function scoreProfile(events: StoryEvent[], jev: JevClient): Promise<DimensionScore[]> {
+  const criteria = Array.from({ length: 10 }, (_, i) => `${i + 1} 级`);
+  const answers = await jev.ask(buildState(events), Object.fromEntries(PROFILE_DIMENSIONS.map((d) => [d.id, {
+    type: 'score' as const,
+    instructions: `根据用户行为轨迹，评估其「${d.label}」维度水平：${d.description}。仅按已观察到的行为判断，证据少或矛盾时降低置信度。`,
+    criteria,
+  }])));
+  return PROFILE_DIMENSIONS.map((d) => {
+    const a = answers?.[d.id];
+    if (a?.type !== 'score' || !Number.isFinite(a.score) || a.score < 0 || a.score > 9 ||
+        !Number.isFinite(a.confidence) || a.confidence < 0 || a.confidence > 1) {
+      throw new Error(`Jev 返回无效的 ${d.id} 评分`);
+    }
+    return { id: d.id, label: d.label, score: Math.round((a.score + 1) * 10) / 10, max: 10, confidence: a.confidence };
+  });
+}
+
+export function extractConfidences(scores: DimensionScore[]): Confidences {
+  return Object.fromEntries(scores.map((s) => [s.id, s.confidence]));
+}