feat: add creative-only output format and parser

writer-prompts.ts: add mode parameter ("full"|"creative") to
buildWriterSystemPrompt; creative mode outputs only PRE_WRITE_CHECK,
CHAPTER_TITLE, CHAPTER_CONTENT — no settlement blocks.

writer-parser.ts: add parseCreativeOutput() for the 3-block format.

packages/core/src/agents/writer-parser.ts

@@ -1,6 +1,35 @@
 import type { GenreProfile } from "../models/genre-profile.js";
 import type { WriteChapterOutput } from "./writer.js";
 
+export interface CreativeOutput {
+  readonly title: string;
+  readonly content: string;
+  readonly wordCount: number;
+  readonly preWriteCheck: string;
+}
+
+export function parseCreativeOutput(
+  chapterNumber: number,
+  content: string,
+): CreativeOutput {
+  const extract = (tag: string): string => {
+    const regex = new RegExp(
+      `=== ${tag} ===\\s*([\\s\\S]*?)(?==== [A-Z_]+ ===|$)`,
+    );
+    const match = content.match(regex);
+    return match?.[1]?.trim() ?? "";
+  };
+
+  const chapterContent = extract("CHAPTER_CONTENT");
+
+  return {
+    title: extract("CHAPTER_TITLE") || `第${chapterNumber}章`,
+    content: chapterContent,
+    wordCount: chapterContent.length,
+    preWriteCheck: extract("PRE_WRITE_CHECK"),
+  };
+}
+
 export type ParsedWriterOutput = Omit<WriteChapterOutput, "postWriteErrors" | "postWriteWarnings">;
 
 /**

packages/core/src/agents/writer-prompts.ts

@@ -15,7 +15,12 @@ export function buildWriterSystemPrompt(
   styleGuide: string,
   styleFingerprint?: string,
   chapterNumber?: number,
+  mode: "full" | "creative" = "full",
 ): string {
+  const outputSection = mode === "creative"
+    ? buildCreativeOutputFormat(book, genreProfile)
+    : buildOutputFormat(book, genreProfile);
+
   const sections = [
     buildGenreIntro(book, genreProfile),
     buildCoreRules(book),
@@ -33,7 +38,7 @@ export function buildWriterSystemPrompt(
     buildStyleGuide(styleGuide),
     buildStyleFingerprint(styleFingerprint),
     buildPreWriteChecklist(book, genreProfile),
-    buildOutputFormat(book, genreProfile),
+    outputSection,
   ];
 
   return sections.filter(Boolean).join("\n\n");
@@ -421,6 +426,41 @@ function buildPreWriteChecklist(book: BookConfig, gp: GenreProfile): string {
   return lines.join("\n");
 }
 
+// ---------------------------------------------------------------------------
+// Creative-only output format (no settlement blocks)
+// ---------------------------------------------------------------------------
+
+function buildCreativeOutputFormat(book: BookConfig, gp: GenreProfile): string {
+  const resourceRow = gp.numericalSystem
+    ? "| 当前资源总量 | X | 与账本一致 |\n| 本章预计增量 | +X（来源） | 无增量写+0 |"
+    : "";
+
+  const preWriteTable = `=== PRE_WRITE_CHECK ===
+（必须输出Markdown表格）
+| 检查项 | 本章记录 | 备注 |
+|--------|----------|------|
+| 大纲锚定 | 当前卷名/阶段 + 本章应推进的具体节点 | 严禁跳过节点或提前消耗后续剧情 |
+| 上下文范围 | 第X章至第Y章 / 状态卡 / 设定文件 | |
+| 当前锚点 | 地点 / 对手 / 收益目标 | 锚点必须具体 |
+${resourceRow}| 待回收伏笔 | Hook-A / Hook-B | 与伏笔池一致 |
+| 本章冲突 | 一句话概括 | |
+| 章节类型 | ${gp.chapterTypes.join("/")} | |
+| 风险扫描 | OOC/信息越界/设定冲突${gp.powerScaling ? "/战力崩坏" : ""}/节奏/词汇疲劳 | |`;
+
+  return `## 输出格式（严格遵守）
+
+${preWriteTable}
+
+=== CHAPTER_TITLE ===
+(章节标题，不含"第X章")
+
+=== CHAPTER_CONTENT ===
+(正文内容，${book.chapterWordCount}字左右)
+
+【重要】本次只需输出以上三个区块（PRE_WRITE_CHECK、CHAPTER_TITLE、CHAPTER_CONTENT）。
+状态卡、伏笔池、摘要等追踪文件将由后续结算阶段处理，请勿输出。`;
+}
+
 // ---------------------------------------------------------------------------
 // Output format
 // ---------------------------------------------------------------------------

packages/core/src/index.ts

@@ -28,7 +28,7 @@ export { analyzeStyle } from "./agents/style-analyzer.js";
 export { analyzeDetectionInsights } from "./agents/detection-insights.js";
 export { validatePostWrite, type PostWriteViolation } from "./agents/post-write-validator.js";
 export { ChapterAnalyzerAgent, type AnalyzeChapterInput, type AnalyzeChapterOutput } from "./agents/chapter-analyzer.js";
-export { parseWriterOutput, type ParsedWriterOutput } from "./agents/writer-parser.js";
+export { parseWriterOutput, parseCreativeOutput, type ParsedWriterOutput, type CreativeOutput } from "./agents/writer-parser.js";
 export { buildSettlerSystemPrompt, buildSettlerUserPrompt } from "./agents/settler-prompts.js";
 export { parseSettlementOutput, type SettlementOutput } from "./agents/settler-parser.js";