diff --git a/apps/web/components/workbench/Workbench.tsx b/apps/web/components/workbench/Workbench.tsx
index 8a348ca..28d4b84 100644
--- a/apps/web/components/workbench/Workbench.tsx
+++ b/apps/web/components/workbench/Workbench.tsx
@@ -33,7 +33,12 @@ import {
   WORKBENCH_CHAPTER_NO,
   type ChapterEntry,
 } from "@/lib/workbench/chapter";
-import { composeDirective, STYLE_PRESETS } from "@/lib/workbench/directive";
+import {
+  composeDirective,
+  PLOT_PRESETS,
+  STYLE_PRESETS,
+  type Preset,
+} from "@/lib/workbench/directive";
 import { applyRefinement } from "@/lib/workbench/refineApply";
 import { buttonClass } from "@/lib/ui/variants";
 import { ChapterList, ChapterListContent } from "./ChapterList";
@@ -381,11 +386,23 @@ function DirectivePanel({
       </summary>
       <div id={panelId} className="mt-3 space-y-3">
         <SectionHeader
-          title="写作指令"
-          description="用于补充或覆盖本章大纲节拍，只影响本次生成。"
+          title="AI 写作诉求"
+          description="选文风、点剧情需求、写自己的要求，只影响本次生成。"
+        />
+        <PresetGroup
+          label="文风"
+          presets={STYLE_PRESETS}
+          presetIds={presetIds}
+          onToggle={onTogglePreset}
+        />
+        <PresetGroup
+          label="剧情需求"
+          presets={PLOT_PRESETS}
+          presetIds={presetIds}
+          onToggle={onTogglePreset}
         />
         <label className="block">
-          <span className="sr-only">本章指令</span>
+          <span className="mb-1 block text-sm text-ink-soft">自己的要求</span>
           <TextArea
             value={directive}
             onChange={(e) => onDirectiveChange(e.target.value)}
@@ -393,26 +410,9 @@ function DirectivePanel({
             placeholder="本章想怎么写？（可选，覆盖/补充大纲节拍）"
           />
         </label>
-        <div className="flex flex-wrap gap-2" role="group" aria-label="风格预设">
-          {STYLE_PRESETS.map((preset) => {
-            const active = presetIds.includes(preset.id);
-            return (
-              <Button
-                key={preset.id}
-                type="button"
-                aria-pressed={active}
-                onClick={() => onTogglePreset(preset.id)}
-                variant={active ? "outline" : "secondary"}
-                size="sm"
-              >
-                {preset.label}
-              </Button>
-            );
-          })}
-        </div>
         {activeCount > 0 ? (
           <StatusNote variant="info">
-            写本章时会把已选预设和自由指令合并进本次生成请求。
+            写本章时会把已选文风/剧情预设和你的要求合并进本次生成请求。
           </StatusNote>
         ) : null}
       </div>
@@ -420,6 +420,39 @@ function DirectivePanel({
   );
 }
 
+interface PresetGroupProps {
+  label: string;
+  presets: readonly Preset[];
+  presetIds: readonly string[];
+  onToggle: (id: string) => void;
+}
+
+// 一组预设 chips（文风 / 剧情需求）：点选 toggle，选中高亮。id 统一进 presetIds。
+function PresetGroup({ label, presets, presetIds, onToggle }: PresetGroupProps) {
+  return (
+    <div>
+      <p className="mb-1 text-sm text-ink-soft">{label}</p>
+      <div className="flex flex-wrap gap-2" role="group" aria-label={label}>
+        {presets.map((preset) => {
+          const active = presetIds.includes(preset.id);
+          return (
+            <Button
+              key={preset.id}
+              type="button"
+              aria-pressed={active}
+              onClick={() => onToggle(preset.id)}
+              variant={active ? "outline" : "secondary"}
+              size="sm"
+            >
+              {preset.label}
+            </Button>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
 // 写章失败提示：友好文案（不暴露 raw code）+ 可选「去设置」动作（F4）。
 function StreamErrorNote({
   streamError,
diff --git a/apps/web/lib/workbench/directive.test.ts b/apps/web/lib/workbench/directive.test.ts
index 188c256..2fc05e2 100644
--- a/apps/web/lib/workbench/directive.test.ts
+++ b/apps/web/lib/workbench/directive.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { composeDirective, STYLE_PRESETS } from "./directive";
+import { composeDirective, PLOT_PRESETS, STYLE_PRESETS } from "./directive";
 
 describe("composeDirective", () => {
   it("returns empty string when nothing selected", () => {
@@ -23,4 +23,16 @@ describe("composeDirective", () => {
     const lessAi = STYLE_PRESETS.find((p) => p.id === "less-ai")!.text;
     expect(composeDirective("", ["nope", "less-ai"])).toBe(lessAi);
   });
+
+  it("resolves 剧情需求 presets alongside 文风", () => {
+    const plot = PLOT_PRESETS[0]!;
+    expect(composeDirective("", [plot.id])).toBe(plot.text);
+  });
+
+  it("orders 文风 presets before 剧情 presets, then free text", () => {
+    const style = STYLE_PRESETS[0]!;
+    const plot = PLOT_PRESETS[0]!;
+    const result = composeDirective("再收紧节奏", [plot.id, style.id]);
+    expect(result).toBe(`${style.text}；${plot.text}；再收紧节奏`);
+  });
 });
diff --git a/apps/web/lib/workbench/directive.ts b/apps/web/lib/workbench/directive.ts
index 2f70f65..82da0c2 100644
--- a/apps/web/lib/workbench/directive.ts
+++ b/apps/web/lib/workbench/directive.ts
@@ -1,33 +1,47 @@
-// T4-b · 本章指令组装（纯逻辑，UX §3）。
-// 作者自由文本 + 风格快捷预设 → 单条 directive 串，传入 draft 生成（直通后端 volatile）。
+// 本章 AI写作三槽（纯逻辑，UX §3；写作工作台重构 Phase 2）。
+// 三槽 = 文风预设 + 剧情需求预设 + 自定义要求（自由文本）→ 单条 directive 串，
+// 直通后端 volatile（MVP 纯前端、零契约、不动 write_craft.md 字节 → 金标准零回归）。
 // 组件只渲染 chips/textarea；预设清单与组装规则集中在此，确定性、不可变。
 
-export interface StylePreset {
+export interface Preset {
   id: string;
   label: string;
   text: string;
 }
 
-// 风格快捷预设（点选拼入指令开头，引导本章文风）。
-export const STYLE_PRESETS: readonly StylePreset[] = [
+// 文风预设（书级文风倾向；点选引导本章表达）。来源：现有 + style_extract 维度离散化。
+export const STYLE_PRESETS: readonly Preset[] = [
   { id: "less-ai", label: "减少AI味", text: "减少 AI 腔，去掉套话与排比堆砌" },
   { id: "colloquial", label: "口语化", text: "用更口语、贴近人物的表达" },
   { id: "fast-pace", label: "快节奏", text: "加快节奏，少铺垫多冲突推进" },
 ];
 
-const PRESET_BY_ID: ReadonlyMap<string, StylePreset> = new Map(
-  STYLE_PRESETS.map((preset) => [preset.id, preset]),
+// 剧情需求预设（章级桥段诉求；作者「卡文给方向」）。来源：plan §4.2 分类法
+// （tianyayu6/write-web-novels + oh-story-claudecode，均 MIT）。
+export const PLOT_PRESETS: readonly Preset[] = [
+  { id: "plot-faceslap", label: "打脸反转", text: "本章安排一次打脸/反转，先抑后扬给足爽感" },
+  { id: "plot-hook-end", label: "章末钩子", text: "章末留一个强钩子/悬念，驱动追读" },
+  { id: "plot-climax", label: "高潮爆发", text: "本章为高潮，冲突集中爆发、情绪拉满" },
+  { id: "plot-turn", label: "关键转折", text: "本章制造关键转折，改变人物处境或目标" },
+  { id: "plot-reveal", label: "扮猪吃虎", text: "先藏拙后亮实力，制造反差与压制感" },
+];
+
+// 全部预设（文风在前、剧情在后）——组装按此声明序，保证输出稳定可测。
+const ALL_PRESETS: readonly Preset[] = [...STYLE_PRESETS, ...PLOT_PRESETS];
+
+const PRESET_BY_ID: ReadonlyMap<string, Preset> = new Map(
+  ALL_PRESETS.map((preset) => [preset.id, preset]),
 );
 
 const SEPARATOR = "；";
 
-// 组合选中预设文案（按 STYLE_PRESETS 原序）+ 自由文本为一条指令。空 → ""。
+// 组合选中预设文案（按 ALL_PRESETS 原序：文风→剧情）+ 自定义自由文本为一条指令。空 → ""。
 export function composeDirective(
   freeText: string,
   presetIds: readonly string[],
 ): string {
   const selected = new Set(presetIds);
-  const presetTexts = STYLE_PRESETS.filter((preset) =>
+  const presetTexts = ALL_PRESETS.filter((preset) =>
     selected.has(preset.id),
   ).map((preset) => preset.text);
   const trimmedFree = freeText.trim();