diff --git a/muse-studio/src/api/mocks/handlers/content.ts b/muse-studio/src/api/mocks/handlers/content.ts
index 8a45aa51..9a510485 100644
--- a/muse-studio/src/api/mocks/handlers/content.ts
+++ b/muse-studio/src/api/mocks/handlers/content.ts
@@ -161,6 +161,33 @@ const INITIAL_CHAPTERS: MockChapter[] = [
 let mockWorks = JSON.parse(JSON.stringify(INITIAL_WORKS)) as MockWork[];
 let mockChapters = JSON.parse(JSON.stringify(INITIAL_CHAPTERS)) as MockChapter[];
 
+/** B5 planning section mock 类型 */
+interface MockPlanningSection {
+  sectionKey: string;
+  sectionName: string;
+  content: Record<string, unknown>;
+  revision: number;
+  schemaVersion: number;
+  projectionVersion: number;
+  usedFieldKeys: string[];
+}
+
+/** Meta Schema 投影字段定义（固定 schema，供 meta-projection mock 按字段渲染表单） */
+const PROJECTION_DEFS: Record<string, {
+  projectionKey: string; projectionName: string; schemaVersion: number; projectionVersion: number;
+  fields: Array<{ fieldKey: string; fieldName: string; fieldType: string; uiVisible: boolean; userEditable: boolean; enumValues?: string[] }>;
+}> = {
+  setting: {
+    projectionKey: 'setting', projectionName: '故事设定', schemaVersion: 1, projectionVersion: 1,
+    fields: [
+      { fieldKey: 'time_period', fieldName: '时代背景', fieldType: 'enum', uiVisible: true, userEditable: true, enumValues: ['古代', '现代', '未来'] },
+      { fieldKey: 'world_overview', fieldName: '世界观概述', fieldType: 'text', uiVisible: true, userEditable: true },
+    ],
+  },
+};
+
+let mockPlanningSections: Record<string, MockPlanningSection[]> = {};
+
 /**
  * 重置 Mock 内存数据库
  * 在单元测试 beforeEach 中调用，保证测试套件之间的并发与环境完全隔离
@@ -168,12 +195,75 @@ let mockChapters = JSON.parse(JSON.stringify(INITIAL_CHAPTERS)) as MockChapter[]
 export function resetMockDb(): void {
   mockWorks = JSON.parse(JSON.stringify(INITIAL_WORKS));
   mockChapters = JSON.parse(JSON.stringify(INITIAL_CHAPTERS));
+  mockPlanningSections = {};
 }
 
 /**
  * 作品与内容管理 API 的 MSW Mock 处理器
  */
 export const contentHandlers = [
+  // ===== B5 planning 编辑器：planning 结构 + meta-projection 字段 =====
+  // GET planning 结构（已确认的 sections）
+  http.get('/app-api/muse/works/:workId/planning', ({ params }) => {
+    const sections = mockPlanningSections[String(params.workId)] ?? [];
+    return HttpResponse.json({ code: 0, msg: 'success', data: {
+      workId: String(params.workId),
+      revision: sections.reduce((m, s) => Math.max(m, s.revision), 0),
+      sections,
+    } });
+  }),
+  // GET meta-projection 摘要列表
+  http.get('/app-api/muse/works/:workId/meta-projections', () => {
+    const list = Object.values(PROJECTION_DEFS).map((p) => ({
+      projectionKey: p.projectionKey, projectionName: p.projectionName,
+      schemaVersion: p.schemaVersion, projectionVersion: p.projectionVersion, fieldCount: p.fields.length,
+    }));
+    return HttpResponse.json({ code: 0, msg: 'success', data: list });
+  }),
+  // GET meta-projection 详情（fields[].value 回填已存 planning 值）
+  http.get('/app-api/muse/works/:workId/meta-projections/:projectionKey', ({ params }) => {
+    const def = PROJECTION_DEFS[String(params.projectionKey)];
+    if (!def) return HttpResponse.json({ code: 404, msg: 'projection 不存在', data: null });
+    const sections = mockPlanningSections[String(params.workId)] ?? [];
+    const saved = sections.find((s) => s.sectionKey === def.projectionKey);
+    const fields = def.fields.map((f) => ({ ...f, value: saved?.content[f.fieldKey] }));
+    return HttpResponse.json({ code: 0, msg: 'success', data: {
+      projectionKey: def.projectionKey, projectionName: def.projectionName,
+      schemaVersion: def.schemaVersion, projectionVersion: def.projectionVersion,
+      dataRevision: saved?.revision ?? 0, fields,
+    } });
+  }),
+  // PUT 保存 planning 项（记录 content + usedFieldKeys，revision 自增）
+  http.put('/app-api/muse/works/:workId/planning/:sectionKey', async ({ params, request }) => {
+    const body = (await request.json()) as { content: Record<string, unknown>; usedFieldKeys?: string[] };
+    const workId = String(params.workId);
+    const sectionKey = String(params.sectionKey);
+    const sections = mockPlanningSections[workId] ?? (mockPlanningSections[workId] = []);
+    const def = PROJECTION_DEFS[sectionKey];
+    let section = sections.find((s) => s.sectionKey === sectionKey);
+    if (!section) {
+      section = {
+        sectionKey, sectionName: def?.projectionName ?? sectionKey, content: {},
+        revision: 0, schemaVersion: def?.schemaVersion ?? 1, projectionVersion: def?.projectionVersion ?? 1,
+        usedFieldKeys: [],
+      };
+      sections.push(section);
+    }
+    section.content = body.content;
+    section.usedFieldKeys = body.usedFieldKeys ?? [];
+    section.revision += 1;
+    return HttpResponse.json({ code: 0, msg: 'success', data: {
+      sectionKey, newRevision: section.revision, updatedAt: '2026-06-21T00:00:00Z',
+    } });
+  }),
+  // POST 校验动态字段（mock 简化：全 valid）
+  http.post('/app-api/muse/works/:workId/dynamic-fields/validate', async ({ request }) => {
+    const body = (await request.json()) as { fields: Array<{ fieldKey: string }> };
+    return HttpResponse.json({ code: 0, msg: 'success', data: {
+      valid: true, fieldResults: body.fields.map((f) => ({ fieldKey: f.fieldKey, valid: true })),
+    } });
+  }),
+
   // GET /app-api/muse/works — 获取作品列表
   http.get('/app-api/muse/works', () => {
     return HttpResponse.json({
diff --git a/muse-studio/src/features/editor/hooks/usePlanning.test.tsx b/muse-studio/src/features/editor/hooks/usePlanning.test.tsx
new file mode 100644
index 00000000..4de39685
--- /dev/null
+++ b/muse-studio/src/features/editor/hooks/usePlanning.test.tsx
@@ -0,0 +1,71 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { renderHook, waitFor } from '@testing-library/react';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { usePlanning, useMetaProjections, useMetaProjection, useSavePlanningItem } from './usePlanning';
+import { resetMockDb } from '@/api/mocks/handlers/content';
+import React from 'react';
+
+const createTestQueryClient = () =>
+  new QueryClient({ defaultOptions: { queries: { retry: false, gcTime: 0 } } });
+
+const wrapper = ({ children }: { children: React.ReactNode }) => {
+  const queryClient = createTestQueryClient();
+  return <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>;
+};
+
+describe('usePlanning / meta-projection hooks 单元测试', () => {
+  beforeEach(() => {
+    resetMockDb();
+  });
+
+  it('useMetaProjections 应拉取投影摘要列表', async () => {
+    const { result } = renderHook(() => useMetaProjections('1'), { wrapper });
+    await waitFor(() => expect(result.current.isSuccess).toBe(true));
+    const list = result.current.data ?? [];
+    expect(list.length).toBeGreaterThanOrEqual(1);
+    expect(list[0]?.projectionKey).toBe('setting');
+  });
+
+  it('useMetaProjection 应拉取 projection 字段定义', async () => {
+    const { result } = renderHook(() => useMetaProjection('1', 'setting'), { wrapper });
+    await waitFor(() => expect(result.current.isSuccess).toBe(true));
+    const fields = result.current.data?.fields ?? [];
+    expect(fields.map((f) => f.fieldKey)).toContain('time_period');
+    expect(fields.map((f) => f.fieldKey)).toContain('world_overview');
+    // 未保存时 value 为空。
+    expect(fields.find((f) => f.fieldKey === 'time_period')?.value).toBeUndefined();
+  });
+
+  it('usePlanning 初始应为空结构', async () => {
+    const { result } = renderHook(() => usePlanning('1'), { wrapper });
+    await waitFor(() => expect(result.current.isSuccess).toBe(true));
+    expect(result.current.data?.sections ?? []).toHaveLength(0);
+  });
+
+  it('useSavePlanningItem 保存后应记录 content 并回填到 projection value', async () => {
+    const { result: saveHook } = renderHook(() => useSavePlanningItem('1'), { wrapper });
+    saveHook.current.mutate({
+      sectionKey: 'setting',
+      reqVO: {
+        commandId: 'cmd-1',
+        content: { time_period: '古代', world_overview: '架空世界' },
+        expectedRevision: 0,
+        usedFieldKeys: ['time_period', 'world_overview'],
+      },
+    });
+    await waitFor(() => expect(saveHook.current.isSuccess).toBe(true));
+    expect(saveHook.current.data?.newRevision).toBe(1);
+
+    // 重新拉 projection，验证 value 回填（保存的字段值经 mock 回填到 fields[].value）。
+    const { result: projHook } = renderHook(() => useMetaProjection('1', 'setting'), { wrapper });
+    await waitFor(() => expect(projHook.current.isSuccess).toBe(true));
+    const fields = projHook.current.data?.fields ?? [];
+    expect(fields.find((f) => f.fieldKey === 'time_period')?.value).toBe('古代');
+
+    // planning 结构也应有该 section。
+    const { result: planHook } = renderHook(() => usePlanning('1'), { wrapper });
+    await waitFor(() => expect(planHook.current.isSuccess).toBe(true));
+    expect(planHook.current.data?.sections ?? []).toHaveLength(1);
+    expect(planHook.current.data?.sections?.[0]?.sectionKey).toBe('setting');
+  });
+});
diff --git a/muse-studio/src/features/editor/hooks/usePlanning.ts b/muse-studio/src/features/editor/hooks/usePlanning.ts
new file mode 100644
index 00000000..11987ec2
--- /dev/null
+++ b/muse-studio/src/features/editor/hooks/usePlanning.ts
@@ -0,0 +1,77 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { api } from '@/api/client';
+import type {
+  PlanningStructure,
+  PlanningItemSaveResult,
+  MetaProjectionSummary,
+  MetaProjectionDetail,
+  DynamicFieldValidationRequest,
+  DynamicFieldValidationResult,
+} from '@/types/openapi';
+
+/**
+ * 保存 planning 项的请求 DTO（内联自定义）。
+ *
+ * 不复用 openapi 生成的 SavePlanningItemRequest：其 content 为 `Record<string, never>` 无法承载
+ * fieldKey→value 动态字段值，且尚缺 usedFieldKeys 字段。此处 content 放 fieldKey→value，
+ * usedFieldKeys 传本次用到的 schema 字段（写入后端字段用量快照，供 Planning 维度字段级真实计数）。
+ */
+export interface SavePlanningItemDto {
+  commandId: string;
+  content: Record<string, unknown>;
+  expectedRevision: number;
+  expectedSchemaVersion?: number;
+  expectedProjectionVersion?: number;
+  usedFieldKeys?: string[];
+  auditReason?: string;
+}
+
+/** 拉取作品的正式规划结构（已确认的 sections）。 */
+export function usePlanning(workId: string | null) {
+  return useQuery({
+    queryKey: ['planning', workId],
+    queryFn: () => api.get<PlanningStructure>(`/works/${workId}/planning`),
+    enabled: !!workId,
+  });
+}
+
+/** 拉取作品的 Meta Schema 投影摘要列表（哪些 projection/section 可按字段编辑）。 */
+export function useMetaProjections(workId: string | null) {
+  return useQuery({
+    queryKey: ['metaProjections', workId],
+    queryFn: () => api.get<MetaProjectionSummary[]>(`/works/${workId}/meta-projections`),
+    enabled: !!workId,
+  });
+}
+
+/** 拉取某 projection 的字段定义 + 已存值回填（按 schema 字段渲染表单的数据源）。 */
+export function useMetaProjection(workId: string | null, projectionKey: string | null) {
+  return useQuery({
+    queryKey: ['metaProjection', workId, projectionKey],
+    queryFn: () =>
+      api.get<MetaProjectionDetail>(`/works/${workId}/meta-projections/${projectionKey}`),
+    enabled: !!workId && !!projectionKey,
+  });
+}
+
+/** 保存 planning 项（PUT；传 usedFieldKeys 落字段用量快照）。 */
+export function useSavePlanningItem(workId: string) {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (params: { sectionKey: string; reqVO: SavePlanningItemDto }) =>
+      api.put<PlanningItemSaveResult>(`/works/${workId}/planning/${params.sectionKey}`, params.reqVO),
+    onSuccess: () => {
+      // planning 与对应 projection 缓存失效（projection.fields[].value 会回填新存值）。
+      queryClient.invalidateQueries({ queryKey: ['planning', workId] });
+      queryClient.invalidateQueries({ queryKey: ['metaProjection', workId] });
+    },
+  });
+}
+
+/** 保存前按 schema 校验动态字段（可选；返回 valid + 字段错误 + 路由建议）。 */
+export function useValidateDynamicFields(workId: string) {
+  return useMutation({
+    mutationFn: (reqVO: DynamicFieldValidationRequest) =>
+      api.post<DynamicFieldValidationResult>(`/works/${workId}/dynamic-fields/validate`, reqVO),
+  });
+}
diff --git a/muse-studio/src/types/openapi.ts b/muse-studio/src/types/openapi.ts
index 2bc355ae..8f0f8ee3 100644
--- a/muse-studio/src/types/openapi.ts
+++ b/muse-studio/src/types/openapi.ts
@@ -46,3 +46,11 @@ export type AccountProfile = AccountComponents['schemas']['AccountProfile'];
 export type AppEntitlementDetail = AccountComponents['schemas']['AppEntitlementDetail'];
 export type AppUsageSummary = AccountComponents['schemas']['AppUsageSummary'];
 export type ProfileUpdateRequest = AccountComponents['schemas']['ProfileUpdateRequest'];
+// Planning / Meta-Projection（B5 planning 编辑器按 schema 字段填值）
+export type PlanningStructure = ContentComponents['schemas']['PlanningStructure'];
+export type PlanningSection = ContentComponents['schemas']['PlanningSection'];
+export type PlanningItemSaveResult = ContentComponents['schemas']['PlanningItemSaveResult'];
+export type MetaProjectionSummary = ContentComponents['schemas']['MetaProjectionSummary'];
+export type MetaProjectionDetail = ContentComponents['schemas']['MetaProjectionDetail'];
+export type DynamicFieldValidationRequest = ContentComponents['schemas']['DynamicFieldValidationRequest'];
+export type DynamicFieldValidationResult = ContentComponents['schemas']['DynamicFieldValidationResult'];