diff --git a/.hermes/shared-memory/decision-log.md b/.hermes/shared-memory/decision-log.md
index fa2c5a69..b437fecd 100644
--- a/.hermes/shared-memory/decision-log.md
+++ b/.hermes/shared-memory/decision-log.md
@@ -1403,6 +1403,14 @@
 - 验证方式：`npm run test -- src/components/platform-entry/platformMiniGameDraftGenerationStateModel.test.ts`、针对新 Module 和 `PlatformEntryFlowShellImpl.tsx` 执行 ESLint、`npm run typecheck`、`npm run check:encoding`。
 - 关联文档：`docs/technical/【前端架构】PlatformMiniGameDraftGenerationStateModel收口计划-2026-06-04.md`、`docs/【玩法创作】平台入口与玩法链路-2026-05-15.md`。
 
+## 2026-06-04 Platform Mini Game Draft Payload Model 收口
+
+- 背景：`PlatformEntryFlowShellImpl.tsx` 内联维护拼图 / 抓大鹅表单 payload、拼图编译 action、作品摘要回填 payload 和 pending 草稿 metadata，壳层需要理解描述字段优先级、formDraft 回退、Match3D config / draft / anchorPack 优先级和数字解析。
+- 决策：新增 `src/components/platform-entry/platformMiniGameDraftPayloadModel.ts`，收口 `buildPuzzleFormPayloadFromWork`、`buildPuzzleFormPayloadFromSession`、`buildPuzzleFormPayloadFromAction`、`buildPuzzleCompileActionFromFormPayload`、`buildPendingPuzzleDraftMetadata`、`buildMatch3DFormPayloadFromSession`、`buildMatch3DFormPayloadFromWork` 与 `buildPendingMatch3DDraftMetadata`；`parseOptionalFiniteNumber` 留在 Module 内部。
+- 影响范围：拼图 action 完成 / 执行前 / 失败恢复、拼图表单直生草稿、拼图草稿架恢复、抓大鹅表单直生草稿与失败恢复。
+- 验证方式：`npm run test -- src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts`、针对新 Module 和 `PlatformEntryFlowShellImpl.tsx` 执行 ESLint、`npm run typecheck`、`npm run check:encoding`。
+- 关联文档：`docs/technical/【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md`、`docs/【玩法创作】平台入口与玩法链路-2026-05-15.md`。
+
 ## 2026-06-03 Public Work Presentation 收口
 
 - 背景：作品卡、推荐 runtime meta、排行项、分类项、搜索结果和桌面 hero 共用玩法类型 label 与紧凑计数格式，但规则仍在 `RpgEntryHomeView.tsx` 页面 Implementation 内。
diff --git a/docs/README.md b/docs/README.md
index 82fbcb7f..008afbd3 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -59,6 +59,8 @@ AI 文字游戏模板接入以 [AI_NATIVE_TEXT_GAME_TEMPLATE_MOKU_REFERENCE_PRD_
 
 平台小游戏生成状态的恢复、失败 / 完成收尾、展示 rebase、拼图后端进度合并和 ready / generating 判定收口到 `src/components/platform-entry/platformMiniGameDraftGenerationStateModel.ts`，壳层只保留 API、后台任务、React state、URL 与 stage 副作用，规则见 [【前端架构】PlatformMiniGameDraftGenerationStateModel收口计划-2026-06-04.md](./technical/【前端架构】PlatformMiniGameDraftGenerationStateModel收口计划-2026-06-04.md)。
 
+平台小游戏草稿恢复和提交所需的拼图 / 抓大鹅表单 payload、拼图编译 action 与 pending metadata 收口到 `src/components/platform-entry/platformMiniGameDraftPayloadModel.ts`，壳层只保留 API、Action 执行、background task 与状态副作用，规则见 [【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md](./technical/【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md)。
+
 RPG Agent 结果页发布门禁展示和预览来源 label 收口到 `src/components/platform-entry/platformRpgAgentResultPreviewModel.ts`，壳层只保留 session/profile 编排和结果页 props 传递，规则见 [【前端架构】PlatformRpgAgentResultPreviewModel收口计划-2026-06-04.md](./technical/【前端架构】PlatformRpgAgentResultPreviewModel收口计划-2026-06-04.md)。
 
 平台入口创作生成通知、pending 作品架占位、失败覆盖、拼图稳定 ID 和草稿 Tab 未读点收口到 `src/components/platform-entry/platformDraftGenerationShelfModel.ts`，规则见 [【前端架构】DraftGenerationShelfModel收口计划-2026-06-03.md](./technical/%E3%80%90%E5%89%8D%E7%AB%AF%E6%9E%B6%E6%9E%84%E3%80%91DraftGenerationShelfModel%E6%94%B6%E5%8F%A3%E8%AE%A1%E5%88%92-2026-06-03.md)。
diff --git a/docs/technical/【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md b/docs/technical/【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md
new file mode 100644
index 00000000..b8ac88c5
--- /dev/null
+++ b/docs/technical/【前端架构】PlatformMiniGameDraftPayloadModel收口计划-2026-06-04.md
@@ -0,0 +1,44 @@
+# 【前端架构】Platform Mini Game Draft Payload Model 收口计划
+
+## 背景
+
+`PlatformEntryFlowShellImpl.tsx` 曾内联维护拼图和抓大鹅草稿恢复所需的表单 payload、拼图编译 action payload、作品摘要回填 payload 和 pending 草稿 metadata。壳层因此需要理解拼图描述字段优先级、formDraft 回退、Match3D config / draft / anchorPack 优先级，以及 pending 作品架标题摘要如何从 payload 派生。
+
+这些逻辑都是 DTO 变换；不读取 React state，不请求网络，也不写 URL。壳层只应决定何时恢复、何时提交 action、何时写入生成状态。
+
+## 决策
+
+新增 `src/components/platform-entry/platformMiniGameDraftPayloadModel.ts` 作为 Platform Mini Game Draft Payload **Module**。其公开 **Interface** 为：
+
+- `buildPuzzleFormPayloadFromWork(item)`：从拼图作品摘要恢复创作表单 payload。
+- `buildPuzzleFormPayloadFromSession(session)`：从拼图 session 恢复创作表单 payload。
+- `buildPuzzleFormPayloadFromAction(payload)`：从拼图 action 还原表单 payload，仅接受 `compile_puzzle_draft` 与 `save_puzzle_form_draft`。
+- `buildPuzzleCompileActionFromFormPayload(payload)`：从表单 payload 构造拼图编译 action。
+- `buildPendingPuzzleDraftMetadata(payload)`：从拼图 payload 派生 pending 作品架 metadata。
+- `buildMatch3DFormPayloadFromSession(session)` 与 `buildMatch3DFormPayloadFromWork(item)`：从抓大鹅 session / work 恢复表单 payload。
+- `buildPendingMatch3DDraftMetadata(payload)`：从抓大鹅 payload 派生 pending metadata。
+
+`PlatformEntryFlowShellImpl.tsx` 仍作为 **Adapter**：它继续负责 API、Action 执行、background task、生成状态、错误提示、作品架和阶段切换。
+
+## Interface 约束
+
+- 拼图 work payload 的 `pictureDescription` 优先级固定为 `workDescription > summary > first level pictureDescription > levelName > workTitle > ''`。
+- 拼图 session payload 的 `pictureDescription` 优先级固定为 `formDraft.pictureDescription > first level pictureDescription > anchorPack.visualSubject.value > seedText > ''`。
+- 拼图编译 action 的 `promptText` 来自 `pictureDescription || seedText`；`workDescription` 缺省回退到图片描述；`candidateCount` 固定为 `1`。
+- 拼图 action 还原只接受 `compile_puzzle_draft` 与 `save_puzzle_form_draft`；其它 action 返回 `null`。
+- 抓大鹅 session payload 优先读取 `config`，其次 `draft`，最后 `anchorPack`；`anchorPack.clearCount` 与 `anchorPack.difficulty` 只接受有限数字字符串或数字。
+- 抓大鹅 work payload 的 `themeText` 优先 `themeText`，缺失回退 `gameName`。
+- pending metadata 只收非空 trim 后标题和摘要；抓大鹅 metadata 用 `themeText || seedText` 同时作为 title 和 summary。
+
+## Depth / Leverage / Locality
+
+- **Depth**：壳层以一组表意函数取得 payload / metadata；字段优先级、默认空资产和数字解析藏入 Module Implementation。
+- **Leverage**：后续调整拼图或抓大鹅草稿恢复表单时，先改 Module 与单测，再保持壳层 API / state 副作用不变。
+- **Locality**：表单恢复与 action payload 规则集中到一个纯测试面，避免在大型平台壳的生成、重试和恢复流程里重复散落 DTO 拼装。
+
+## 验收
+
+- `npm run test -- src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts`
+- `npx eslint src/components/platform-entry/platformMiniGameDraftPayloadModel.ts src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts src/components/platform-entry/PlatformEntryFlowShellImpl.tsx --quiet`
+- `npm run typecheck`
+- `npm run check:encoding`
diff --git a/docs/【玩法创作】平台入口与玩法链路-2026-05-15.md b/docs/【玩法创作】平台入口与玩法链路-2026-05-15.md
index 964d9423..2f5f5cdf 100644
--- a/docs/【玩法创作】平台入口与玩法链路-2026-05-15.md
+++ b/docs/【玩法创作】平台入口与玩法链路-2026-05-15.md
@@ -16,6 +16,8 @@
 
 平台小游戏生成状态的恢复、失败 / 完成收尾、展示 rebase、拼图后端进度合并和 ready / generating 判定统一由 `platformMiniGameDraftGenerationStateModel.ts` 处理。平台壳只决定何时调用并写入对应 React state，不得在壳层重新维护 `MiniGameDraftGenerationState` 的 phase 阈值、`finishedAtMs` 清理或拼图进度 metadata 合并规则。
 
+拼图 / 抓大鹅草稿恢复和提交所需的表单 payload、拼图编译 action 与 pending metadata 统一由 `platformMiniGameDraftPayloadModel.ts` 构造。平台壳不得重新手写拼图描述字段优先级、formDraft 回退、Match3D config / draft / anchorPack 优先级、数字解析或 pending 标题摘要派生规则。
+
 RPG Agent 结果页发布门禁展示由 `platformRpgAgentResultPreviewModel.ts` 判定：平台壳不得重新手写 `CustomWorldProfile` 顶层、`creatorIntent`、`anchorContent`、章节蓝图与首幕 acts 的结构探测，也不得在壳层内联 result preview source label 映射；壳层只负责 session/profile 编排和结果页 props 传递。
 
 统一创作入口覆盖当前可进入创作链路的已有模板：`rpg`、`big-fish`、`puzzle`、`match3d`、`jump-hop`、`wooden-fish`、`square-hole`、`bark-battle`、`visual-novel`、`baby-object-match` 和 `creative-agent`；`airp` 仍是未开放占位，不作为当前统一创作链路目标。拼图、抓大鹅、跳一跳和敲木鱼在前端继续经过 `UnifiedCreationWorkspace` 和 `UnifiedGenerationPage`：`UnifiedCreationWorkspace` 作为平台壳依赖的统一创作编排层，再内部调用 `src/components/unified-creation/workspaces/` 下的 `PuzzleCreationWorkspace`、`Match3DCreationWorkspace`、`JumpHopCreationWorkspace` 和 `WoodenFishCreationWorkspace`。其它已有模板由平台壳用 `UnifiedCreationPage` 包住既有工作台，复用统一标题栏、返回入口、页面级纵向滚动和隐藏字段契约，同时保留各玩法自己的表单、草稿恢复和后续编排。创作页字段清单由后端在 `GET /api/creation-entry/config` 的 `creationTypes[].unifiedCreationSpec` 下发，前端仅在该扩展位缺失时回退到本地默认 spec；字段类型只保留 `text`、`select`、`image`、`audio`。`UnifiedCreationPage` 不在 UI 中额外展示字段说明 chip，也不在右上角显示内部 `playId`、模板 ID 或工作台阶段名；竖屏移动端必须能从标题、表单一路滑到提交按钮。各玩法工作台负责渲染真实输入控件、上传、历史素材、校验和提交，但返回按钮只保留在统一页头，工作台内部不再重复渲染。暗色创作进度卡片位于 `platform-remap-surface` 内时，必须用组件专属 class 覆盖浅色主题 remap，确保白字、浅色边框和进度条底色不会被全局规则改成深色；不要只依赖通用 `text-white*` 类。敲木鱼的音效和功德词条面板不得放进独立内部滚动容器，移动端应跟随页面自然滚动展开。生成页统一展示阶段、当前步骤、总进度、错误和重试动作。
diff --git a/src/components/platform-entry/PlatformEntryFlowShellImpl.tsx b/src/components/platform-entry/PlatformEntryFlowShellImpl.tsx
index ace14e6e..19788c5d 100644
--- a/src/components/platform-entry/PlatformEntryFlowShellImpl.tsx
+++ b/src/components/platform-entry/PlatformEntryFlowShellImpl.tsx
@@ -522,6 +522,16 @@ import {
   rebaseMiniGameDraftGenerationStateForDisplay,
   resolveFinishedMiniGameDraftGenerationState,
 } from './platformMiniGameDraftGenerationStateModel';
+import {
+  buildMatch3DFormPayloadFromSession,
+  buildMatch3DFormPayloadFromWork,
+  buildPendingMatch3DDraftMetadata,
+  buildPendingPuzzleDraftMetadata,
+  buildPuzzleCompileActionFromFormPayload,
+  buildPuzzleFormPayloadFromAction,
+  buildPuzzleFormPayloadFromSession,
+  buildPuzzleFormPayloadFromWork,
+} from './platformMiniGameDraftPayloadModel';
 import {
   buildJumpHopPendingSession,
   buildPuzzleRuntimeWorkFromSession,
@@ -1035,89 +1045,6 @@ function openPuzzleRuntimeStage(
   writePuzzleRuntimeUrlState(state);
 }
 
-function buildPuzzleFormPayloadFromWork(
-  item: PuzzleWorkSummary,
-): CreatePuzzleAgentSessionRequest {
-  const pictureDescription =
-    item.workDescription?.trim() ||
-    item.summary?.trim() ||
-    item.levels?.[0]?.pictureDescription?.trim() ||
-    item.levelName?.trim() ||
-    item.workTitle?.trim() ||
-    '';
-
-  return {
-    seedText: pictureDescription,
-    workTitle: item.workTitle?.trim() || item.levelName?.trim() || undefined,
-    workDescription: item.workDescription?.trim() || item.summary?.trim(),
-    pictureDescription,
-    referenceImageSrc: null,
-    referenceImageSrcs: [],
-    referenceImageAssetObjectId: null,
-    referenceImageAssetObjectIds: [],
-    imageModel: null,
-    aiRedraw: true,
-  };
-}
-
-function parseOptionalFiniteNumber(value: string | number | null | undefined) {
-  if (typeof value === 'number') {
-    return Number.isFinite(value) ? value : undefined;
-  }
-
-  const normalizedValue = value?.trim();
-  if (!normalizedValue) {
-    return undefined;
-  }
-
-  const parsedValue = Number(normalizedValue);
-  return Number.isFinite(parsedValue) ? parsedValue : undefined;
-}
-
-function buildMatch3DFormPayloadFromSession(
-  session: Match3DAgentSessionSnapshot,
-): CreateMatch3DSessionRequest {
-  const themeText =
-    session.config?.themeText?.trim() ||
-    session.draft?.themeText?.trim() ||
-    session.anchorPack.theme.value.trim() ||
-    '';
-
-  return {
-    seedText: themeText,
-    themeText,
-    referenceImageSrc:
-      session.config?.referenceImageSrc ?? session.draft?.referenceImageSrc ?? null,
-    clearCount:
-      session.config?.clearCount ??
-      session.draft?.clearCount ??
-      parseOptionalFiniteNumber(session.anchorPack.clearCount.value) ??
-      undefined,
-    difficulty:
-      session.config?.difficulty ??
-      session.draft?.difficulty ??
-      parseOptionalFiniteNumber(session.anchorPack.difficulty.value) ??
-      undefined,
-    assetStyleId: session.config?.assetStyleId ?? null,
-    assetStyleLabel: session.config?.assetStyleLabel ?? null,
-    assetStylePrompt: session.config?.assetStylePrompt ?? null,
-    generateClickSound: session.config?.generateClickSound,
-  };
-}
-
-function buildMatch3DFormPayloadFromWork(
-  item: Match3DWorkSummary,
-): CreateMatch3DSessionRequest {
-  const themeText = item.themeText?.trim() || item.gameName?.trim() || '';
-  return {
-    seedText: themeText,
-    themeText,
-    referenceImageSrc: item.referenceImageSrc ?? null,
-    clearCount: item.clearCount,
-    difficulty: item.difficulty,
-  };
-}
-
 function normalizeRecoveredPuzzleDraftSession(
   session: PuzzleAgentSessionSnapshot,
 ): PuzzleAgentSessionSnapshot {
@@ -1243,123 +1170,6 @@ function reconcileProfileWalletLocalDeltaWithServerDashboard(
   return Math.max(0, normalizedDelta - reflectedCredit);
 }
 
-function buildPuzzleCompileActionFromFormPayload(
-  payload: CreatePuzzleAgentSessionRequest | null,
-): PuzzleAgentActionRequest {
-  const pictureDescription =
-    payload?.pictureDescription?.trim() || payload?.seedText?.trim();
-  const workTitle = payload?.workTitle?.trim();
-  const workDescription = payload?.workDescription?.trim() || pictureDescription;
-
-  return {
-    action: 'compile_puzzle_draft',
-    promptText: pictureDescription,
-    ...(workTitle ? { workTitle } : {}),
-    ...(workDescription ? { workDescription } : {}),
-    ...(pictureDescription ? { pictureDescription } : {}),
-    referenceImageSrc: payload?.referenceImageSrc || null,
-    referenceImageSrcs: payload?.referenceImageSrcs ?? [],
-    referenceImageAssetObjectId: payload?.referenceImageAssetObjectId ?? null,
-    referenceImageAssetObjectIds: payload?.referenceImageAssetObjectIds ?? [],
-    imageModel: payload?.imageModel ?? null,
-    aiRedraw: payload?.aiRedraw ?? true,
-    candidateCount: 1,
-  };
-}
-
-function buildPuzzleFormPayloadFromSession(
-  session: PuzzleAgentSessionSnapshot,
-): CreatePuzzleAgentSessionRequest {
-  const formDraft = session.draft?.formDraft;
-  const pictureDescription =
-    formDraft?.pictureDescription?.trim() ||
-    session.draft?.levels?.[0]?.pictureDescription?.trim() ||
-    session.anchorPack.visualSubject.value.trim() ||
-    session.seedText?.trim() ||
-    '';
-  const workTitle =
-    formDraft?.workTitle?.trim() || session.draft?.workTitle?.trim();
-  const workDescription =
-    formDraft?.workDescription?.trim() ||
-    session.draft?.workDescription?.trim() ||
-    session.draft?.summary?.trim() ||
-    pictureDescription;
-
-  return {
-    seedText: pictureDescription,
-    ...(workTitle ? { workTitle } : {}),
-    ...(workDescription ? { workDescription } : {}),
-    pictureDescription,
-    referenceImageSrc: null,
-    referenceImageSrcs: [],
-    referenceImageAssetObjectId: null,
-    referenceImageAssetObjectIds: [],
-    imageModel: null,
-    aiRedraw: true,
-  };
-}
-
-function buildPendingPuzzleDraftMetadata(
-  payload: CreatePuzzleAgentSessionRequest | null | undefined,
-) {
-  const title = payload?.workTitle?.trim();
-  const summary =
-    payload?.workDescription?.trim() ||
-    payload?.pictureDescription?.trim() ||
-    payload?.seedText?.trim();
-  return {
-    ...(title ? { title } : {}),
-    ...(summary ? { summary } : {}),
-  };
-}
-
-function buildPendingMatch3DDraftMetadata(
-  payload: CreateMatch3DSessionRequest | null | undefined,
-) {
-  const themeText = payload?.themeText?.trim() || payload?.seedText?.trim();
-  return {
-    ...(themeText ? { title: themeText, summary: themeText } : {}),
-  };
-}
-
-function buildPuzzleFormPayloadFromAction(
-  payload: PuzzleAgentActionRequest,
-): CreatePuzzleAgentSessionRequest | null {
-  if (
-    payload.action !== 'compile_puzzle_draft' &&
-    payload.action !== 'save_puzzle_form_draft'
-  ) {
-    return null;
-  }
-
-  const workTitle = payload.workTitle?.trim() ?? '';
-  const workDescription = payload.workDescription?.trim() ?? '';
-  const pictureDescription =
-    payload.pictureDescription?.trim() || payload.promptText?.trim() || '';
-
-  return {
-    seedText: pictureDescription,
-    ...(workTitle ? { workTitle } : {}),
-    ...(workDescription ? { workDescription } : {}),
-    pictureDescription,
-    referenceImageSrc:
-      payload.action === 'compile_puzzle_draft'
-        ? (payload.referenceImageSrc ?? null)
-        : (payload.referenceImageSrc ?? null),
-    referenceImageSrcs: payload.referenceImageSrcs ?? [],
-    referenceImageAssetObjectId: payload.referenceImageAssetObjectId ?? null,
-    referenceImageAssetObjectIds: payload.referenceImageAssetObjectIds ?? [],
-    imageModel:
-      payload.action === 'compile_puzzle_draft'
-        ? (payload.imageModel ?? null)
-        : (payload.imageModel ?? null),
-    aiRedraw:
-      payload.action === 'compile_puzzle_draft'
-        ? (payload.aiRedraw ?? true)
-        : (payload.aiRedraw ?? true),
-  };
-}
-
 function isPuzzleFormOnlyDraft(session: PuzzleAgentSessionSnapshot | null) {
   return Boolean(
     session?.stage === 'collecting_anchors' && session.draft?.formDraft,
diff --git a/src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts b/src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts
new file mode 100644
index 00000000..056404c6
--- /dev/null
+++ b/src/components/platform-entry/platformMiniGameDraftPayloadModel.test.ts
@@ -0,0 +1,392 @@
+import { describe, expect, test } from 'vitest';
+
+import type {
+  Match3DAgentSessionSnapshot,
+  Match3DAnchorPackResponse,
+} from '../../../packages/shared/src/contracts/match3dAgent';
+import type { Match3DWorkSummary } from '../../../packages/shared/src/contracts/match3dWorks';
+import type { PuzzleAgentActionRequest } from '../../../packages/shared/src/contracts/puzzleAgentActions';
+import type {
+  PuzzleAnchorPack,
+  PuzzleDraftLevel,
+} from '../../../packages/shared/src/contracts/puzzleAgentDraft';
+import type {
+  CreatePuzzleAgentSessionRequest,
+  PuzzleAgentSessionSnapshot,
+} from '../../../packages/shared/src/contracts/puzzleAgentSession';
+import type { PuzzleWorkSummary } from '../../../packages/shared/src/contracts/puzzleWorkSummary';
+import {
+  buildMatch3DFormPayloadFromSession,
+  buildMatch3DFormPayloadFromWork,
+  buildPendingMatch3DDraftMetadata,
+  buildPendingPuzzleDraftMetadata,
+  buildPuzzleCompileActionFromFormPayload,
+  buildPuzzleFormPayloadFromAction,
+  buildPuzzleFormPayloadFromSession,
+  buildPuzzleFormPayloadFromWork,
+} from './platformMiniGameDraftPayloadModel';
+
+function buildPuzzleAnchorPack(): PuzzleAnchorPack {
+  const item = {
+    key: 'theme',
+    label: '主题',
+    value: '星桥机关',
+    status: 'confirmed' as const,
+  };
+  return {
+    themePromise: item,
+    visualSubject: item,
+    visualMood: item,
+    compositionHooks: item,
+    tagsAndForbidden: item,
+  };
+}
+
+function buildPuzzleLevel(
+  overrides: Partial<PuzzleDraftLevel> = {},
+): PuzzleDraftLevel {
+  return {
+    levelId: 'level-1',
+    levelName: '星桥机关',
+    pictureDescription: '关卡画面描述',
+    candidates: [],
+    selectedCandidateId: null,
+    coverImageSrc: null,
+    coverAssetId: null,
+    generationStatus: 'idle',
+    ...overrides,
+  };
+}
+
+function buildPuzzleWork(
+  overrides: Partial<PuzzleWorkSummary> = {},
+): PuzzleWorkSummary {
+  return {
+    workId: 'puzzle-work-1',
+    profileId: 'puzzle-profile-1',
+    ownerUserId: 'user-1',
+    authorDisplayName: '玩家',
+    workTitle: ' 星桥拼图 ',
+    workDescription: ' 修复星桥机关。 ',
+    levelName: '星桥机关',
+    summary: '把碎片拼回原位。',
+    themeTags: ['星桥'],
+    coverImageSrc: '/cover.png',
+    coverAssetId: null,
+    publicationStatus: 'draft',
+    updatedAt: '2026-06-01T10:00:00.000Z',
+    publishedAt: null,
+    publishReady: false,
+    levels: [buildPuzzleLevel()],
+    ...overrides,
+  };
+}
+
+function buildPuzzleSession(
+  overrides: Partial<PuzzleAgentSessionSnapshot> = {},
+): PuzzleAgentSessionSnapshot {
+  const anchorPack = buildPuzzleAnchorPack();
+  return {
+    sessionId: 'puzzle-session-1',
+    seedText: '种子描述',
+    currentTurn: 1,
+    progressPercent: 20,
+    stage: 'collecting_anchors',
+    anchorPack,
+    draft: {
+      workTitle: '会话标题',
+      workDescription: '会话描述',
+      levelName: '星桥机关',
+      summary: '会话摘要',
+      themeTags: ['星桥'],
+      forbiddenDirectives: [],
+      creatorIntent: null,
+      anchorPack,
+      candidates: [],
+      selectedCandidateId: null,
+      coverImageSrc: null,
+      coverAssetId: null,
+      generationStatus: 'idle',
+      levels: [buildPuzzleLevel()],
+      formDraft: {
+        workTitle: '表单标题',
+        workDescription: '表单描述',
+        pictureDescription: '表单画面',
+      },
+    },
+    messages: [],
+    lastAssistantReply: null,
+    publishedProfileId: null,
+    suggestedActions: [],
+    resultPreview: null,
+    updatedAt: '2026-06-01T10:00:00.000Z',
+    ...overrides,
+  };
+}
+
+function buildMatch3DAnchorPack(
+  overrides: Partial<Match3DAnchorPackResponse> = {},
+): Match3DAnchorPackResponse {
+  return {
+    theme: {
+      key: 'theme',
+      label: '主题',
+      value: '海岛玩具',
+      status: 'confirmed',
+    },
+    clearCount: {
+      key: 'clearCount',
+      label: '消除次数',
+      value: '12',
+      status: 'confirmed',
+    },
+    difficulty: {
+      key: 'difficulty',
+      label: '难度',
+      value: '3',
+      status: 'confirmed',
+    },
+    ...overrides,
+  };
+}
+
+function buildMatch3DSession(
+  overrides: Partial<Match3DAgentSessionSnapshot> = {},
+): Match3DAgentSessionSnapshot {
+  return {
+    sessionId: 'match3d-session-1',
+    currentTurn: 1,
+    progressPercent: 20,
+    stage: 'collecting',
+    anchorPack: buildMatch3DAnchorPack(),
+    config: null,
+    draft: null,
+    messages: [],
+    lastAssistantReply: null,
+    publishedProfileId: null,
+    updatedAt: '2026-06-01T11:00:00.000Z',
+    ...overrides,
+  };
+}
+
+function buildMatch3DWork(
+  overrides: Partial<Match3DWorkSummary> = {},
+): Match3DWorkSummary {
+  return {
+    workId: 'match3d-work-1',
+    profileId: 'match3d-profile-1',
+    ownerUserId: 'user-1',
+    gameName: '海岛抓大鹅',
+    themeText: ' 海岛玩具 ',
+    summary: '收集海岛玩具。',
+    tags: ['海岛'],
+    coverImageSrc: '/match3d-cover.png',
+    referenceImageSrc: '/match3d-reference.png',
+    clearCount: 12,
+    difficulty: 3,
+    publicationStatus: 'draft',
+    playCount: 0,
+    updatedAt: '2026-06-01T11:00:00.000Z',
+    publishedAt: null,
+    publishReady: false,
+    ...overrides,
+  };
+}
+
+describe('platformMiniGameDraftPayloadModel', () => {
+  test('builds puzzle form payload from work with fallback description priority', () => {
+    expect(
+      buildPuzzleFormPayloadFromWork(
+        buildPuzzleWork({
+          workDescription: '   ',
+          summary: ' 摘要描述 ',
+          levelName: ' 关卡标题 ',
+        }),
+      ),
+    ).toEqual({
+      seedText: '摘要描述',
+      workTitle: '星桥拼图',
+      workDescription: '摘要描述',
+      pictureDescription: '摘要描述',
+      referenceImageSrc: null,
+      referenceImageSrcs: [],
+      referenceImageAssetObjectId: null,
+      referenceImageAssetObjectIds: [],
+      imageModel: null,
+      aiRedraw: true,
+    });
+  });
+
+  test('builds puzzle form payload from session form draft and fallbacks', () => {
+    expect(buildPuzzleFormPayloadFromSession(buildPuzzleSession())).toEqual({
+      seedText: '表单画面',
+      workTitle: '表单标题',
+      workDescription: '表单描述',
+      pictureDescription: '表单画面',
+      referenceImageSrc: null,
+      referenceImageSrcs: [],
+      referenceImageAssetObjectId: null,
+      referenceImageAssetObjectIds: [],
+      imageModel: null,
+      aiRedraw: true,
+    });
+
+    expect(
+      buildPuzzleFormPayloadFromSession(
+        buildPuzzleSession({
+          draft: {
+            ...buildPuzzleSession().draft!,
+            formDraft: null,
+            levels: [buildPuzzleLevel({ pictureDescription: '关卡优先' })],
+          },
+        }),
+      ).pictureDescription,
+    ).toBe('关卡优先');
+  });
+
+  test('builds puzzle compile action and restores form payload from action', () => {
+    const payload: CreatePuzzleAgentSessionRequest = {
+      seedText: '种子',
+      workTitle: ' 标题 ',
+      workDescription: '',
+      pictureDescription: ' 画面 ',
+      referenceImageSrc: '/ref.png',
+      referenceImageSrcs: ['/ref-a.png'],
+      referenceImageAssetObjectId: 'asset-ref',
+      referenceImageAssetObjectIds: ['asset-ref-a'],
+      imageModel: 'image-model',
+      aiRedraw: false,
+    };
+    const action = buildPuzzleCompileActionFromFormPayload(payload);
+
+    expect(action).toEqual({
+      action: 'compile_puzzle_draft',
+      promptText: '画面',
+      workTitle: '标题',
+      workDescription: '画面',
+      pictureDescription: '画面',
+      referenceImageSrc: '/ref.png',
+      referenceImageSrcs: ['/ref-a.png'],
+      referenceImageAssetObjectId: 'asset-ref',
+      referenceImageAssetObjectIds: ['asset-ref-a'],
+      imageModel: 'image-model',
+      aiRedraw: false,
+      candidateCount: 1,
+    });
+    expect(buildPuzzleFormPayloadFromAction(action)).toEqual({
+      seedText: '画面',
+      workTitle: '标题',
+      workDescription: '画面',
+      pictureDescription: '画面',
+      referenceImageSrc: '/ref.png',
+      referenceImageSrcs: ['/ref-a.png'],
+      referenceImageAssetObjectId: 'asset-ref',
+      referenceImageAssetObjectIds: ['asset-ref-a'],
+      imageModel: 'image-model',
+      aiRedraw: false,
+    });
+    expect(
+      buildPuzzleFormPayloadFromAction({
+        action: 'publish_puzzle_work',
+      } as PuzzleAgentActionRequest),
+    ).toBeNull();
+  });
+
+  test('builds pending puzzle metadata from non-empty payload fields', () => {
+    expect(
+      buildPendingPuzzleDraftMetadata({
+        workTitle: ' 标题 ',
+        workDescription: ' ',
+        pictureDescription: ' 画面 ',
+        seedText: '种子',
+      }),
+    ).toEqual({
+      title: '标题',
+      summary: '画面',
+    });
+    expect(buildPendingPuzzleDraftMetadata(null)).toEqual({});
+  });
+
+  test('builds match3d form payload from session config, draft and anchors', () => {
+    expect(
+      buildMatch3DFormPayloadFromSession(
+        buildMatch3DSession({
+          config: {
+            themeText: ' 配置主题 ',
+            referenceImageSrc: '/config-ref.png',
+            clearCount: 9,
+            difficulty: 4,
+            assetStyleId: 'style-1',
+            assetStyleLabel: '手办',
+            assetStylePrompt: '软陶手办',
+            generateClickSound: true,
+          },
+          draft: {
+            profileId: 'profile-1',
+            gameName: '草稿标题',
+            themeText: '草稿主题',
+            tags: [],
+            referenceImageSrc: '/draft-ref.png',
+            clearCount: 6,
+            difficulty: 2,
+          },
+        }),
+      ),
+    ).toEqual({
+      seedText: '配置主题',
+      themeText: '配置主题',
+      referenceImageSrc: '/config-ref.png',
+      clearCount: 9,
+      difficulty: 4,
+      assetStyleId: 'style-1',
+      assetStyleLabel: '手办',
+      assetStylePrompt: '软陶手办',
+      generateClickSound: true,
+    });
+
+    expect(
+      buildMatch3DFormPayloadFromSession(
+        buildMatch3DSession({
+          anchorPack: buildMatch3DAnchorPack({
+            clearCount: {
+              key: 'clearCount',
+              label: '消除次数',
+              value: 'not-number',
+              status: 'confirmed',
+            },
+          }),
+        }),
+      ),
+    ).toMatchObject({
+      seedText: '海岛玩具',
+      clearCount: undefined,
+      difficulty: 3,
+    });
+  });
+
+  test('builds match3d form payload from work and pending metadata', () => {
+    expect(
+      buildMatch3DFormPayloadFromWork(
+        buildMatch3DWork({
+          themeText: ' ',
+        }),
+      ),
+    ).toEqual({
+      seedText: '海岛抓大鹅',
+      themeText: '海岛抓大鹅',
+      referenceImageSrc: '/match3d-reference.png',
+      clearCount: 12,
+      difficulty: 3,
+    });
+
+    expect(
+      buildPendingMatch3DDraftMetadata({
+        themeText: ' ',
+        seedText: ' 海岛抓大鹅 ',
+      }),
+    ).toEqual({
+      title: '海岛抓大鹅',
+      summary: '海岛抓大鹅',
+    });
+  });
+});
diff --git a/src/components/platform-entry/platformMiniGameDraftPayloadModel.ts b/src/components/platform-entry/platformMiniGameDraftPayloadModel.ts
new file mode 100644
index 00000000..f889b3f0
--- /dev/null
+++ b/src/components/platform-entry/platformMiniGameDraftPayloadModel.ts
@@ -0,0 +1,213 @@
+import type {
+  CreateMatch3DSessionRequest,
+  Match3DAgentSessionSnapshot,
+} from '../../../packages/shared/src/contracts/match3dAgent';
+import type { Match3DWorkSummary } from '../../../packages/shared/src/contracts/match3dWorks';
+import type { PuzzleAgentActionRequest } from '../../../packages/shared/src/contracts/puzzleAgentActions';
+import type {
+  CreatePuzzleAgentSessionRequest,
+  PuzzleAgentSessionSnapshot,
+} from '../../../packages/shared/src/contracts/puzzleAgentSession';
+import type { PuzzleWorkSummary } from '../../../packages/shared/src/contracts/puzzleWorkSummary';
+
+export function buildPuzzleFormPayloadFromWork(
+  item: PuzzleWorkSummary,
+): CreatePuzzleAgentSessionRequest {
+  const pictureDescription =
+    item.workDescription?.trim() ||
+    item.summary?.trim() ||
+    item.levels?.[0]?.pictureDescription?.trim() ||
+    item.levelName?.trim() ||
+    item.workTitle?.trim() ||
+    '';
+
+  return {
+    seedText: pictureDescription,
+    workTitle: item.workTitle?.trim() || item.levelName?.trim() || undefined,
+    workDescription: item.workDescription?.trim() || item.summary?.trim(),
+    pictureDescription,
+    referenceImageSrc: null,
+    referenceImageSrcs: [],
+    referenceImageAssetObjectId: null,
+    referenceImageAssetObjectIds: [],
+    imageModel: null,
+    aiRedraw: true,
+  };
+}
+
+function parseOptionalFiniteNumber(value: string | number | null | undefined) {
+  if (typeof value === 'number') {
+    return Number.isFinite(value) ? value : undefined;
+  }
+
+  const normalizedValue = value?.trim();
+  if (!normalizedValue) {
+    return undefined;
+  }
+
+  const parsedValue = Number(normalizedValue);
+  return Number.isFinite(parsedValue) ? parsedValue : undefined;
+}
+
+export function buildMatch3DFormPayloadFromSession(
+  session: Match3DAgentSessionSnapshot,
+): CreateMatch3DSessionRequest {
+  const themeText =
+    session.config?.themeText?.trim() ||
+    session.draft?.themeText?.trim() ||
+    session.anchorPack.theme.value.trim() ||
+    '';
+
+  return {
+    seedText: themeText,
+    themeText,
+    referenceImageSrc:
+      session.config?.referenceImageSrc ??
+      session.draft?.referenceImageSrc ??
+      null,
+    clearCount:
+      session.config?.clearCount ??
+      session.draft?.clearCount ??
+      parseOptionalFiniteNumber(session.anchorPack.clearCount.value) ??
+      undefined,
+    difficulty:
+      session.config?.difficulty ??
+      session.draft?.difficulty ??
+      parseOptionalFiniteNumber(session.anchorPack.difficulty.value) ??
+      undefined,
+    assetStyleId: session.config?.assetStyleId ?? null,
+    assetStyleLabel: session.config?.assetStyleLabel ?? null,
+    assetStylePrompt: session.config?.assetStylePrompt ?? null,
+    generateClickSound: session.config?.generateClickSound,
+  };
+}
+
+export function buildMatch3DFormPayloadFromWork(
+  item: Match3DWorkSummary,
+): CreateMatch3DSessionRequest {
+  const themeText = item.themeText?.trim() || item.gameName?.trim() || '';
+  return {
+    seedText: themeText,
+    themeText,
+    referenceImageSrc: item.referenceImageSrc ?? null,
+    clearCount: item.clearCount,
+    difficulty: item.difficulty,
+  };
+}
+
+export function buildPuzzleCompileActionFromFormPayload(
+  payload: CreatePuzzleAgentSessionRequest | null,
+): PuzzleAgentActionRequest {
+  const pictureDescription =
+    payload?.pictureDescription?.trim() || payload?.seedText?.trim();
+  const workTitle = payload?.workTitle?.trim();
+  const workDescription = payload?.workDescription?.trim() || pictureDescription;
+
+  return {
+    action: 'compile_puzzle_draft',
+    promptText: pictureDescription,
+    ...(workTitle ? { workTitle } : {}),
+    ...(workDescription ? { workDescription } : {}),
+    ...(pictureDescription ? { pictureDescription } : {}),
+    referenceImageSrc: payload?.referenceImageSrc || null,
+    referenceImageSrcs: payload?.referenceImageSrcs ?? [],
+    referenceImageAssetObjectId: payload?.referenceImageAssetObjectId ?? null,
+    referenceImageAssetObjectIds: payload?.referenceImageAssetObjectIds ?? [],
+    imageModel: payload?.imageModel ?? null,
+    aiRedraw: payload?.aiRedraw ?? true,
+    candidateCount: 1,
+  };
+}
+
+export function buildPuzzleFormPayloadFromSession(
+  session: PuzzleAgentSessionSnapshot,
+): CreatePuzzleAgentSessionRequest {
+  const formDraft = session.draft?.formDraft;
+  const pictureDescription =
+    formDraft?.pictureDescription?.trim() ||
+    session.draft?.levels?.[0]?.pictureDescription?.trim() ||
+    session.anchorPack.visualSubject.value.trim() ||
+    session.seedText?.trim() ||
+    '';
+  const workTitle =
+    formDraft?.workTitle?.trim() || session.draft?.workTitle?.trim();
+  const workDescription =
+    formDraft?.workDescription?.trim() ||
+    session.draft?.workDescription?.trim() ||
+    session.draft?.summary?.trim() ||
+    pictureDescription;
+
+  return {
+    seedText: pictureDescription,
+    ...(workTitle ? { workTitle } : {}),
+    ...(workDescription ? { workDescription } : {}),
+    pictureDescription,
+    referenceImageSrc: null,
+    referenceImageSrcs: [],
+    referenceImageAssetObjectId: null,
+    referenceImageAssetObjectIds: [],
+    imageModel: null,
+    aiRedraw: true,
+  };
+}
+
+export function buildPendingPuzzleDraftMetadata(
+  payload: CreatePuzzleAgentSessionRequest | null | undefined,
+) {
+  const title = payload?.workTitle?.trim();
+  const summary =
+    payload?.workDescription?.trim() ||
+    payload?.pictureDescription?.trim() ||
+    payload?.seedText?.trim();
+  return {
+    ...(title ? { title } : {}),
+    ...(summary ? { summary } : {}),
+  };
+}
+
+export function buildPendingMatch3DDraftMetadata(
+  payload: CreateMatch3DSessionRequest | null | undefined,
+) {
+  const themeText = payload?.themeText?.trim() || payload?.seedText?.trim();
+  return {
+    ...(themeText ? { title: themeText, summary: themeText } : {}),
+  };
+}
+
+export function buildPuzzleFormPayloadFromAction(
+  payload: PuzzleAgentActionRequest,
+): CreatePuzzleAgentSessionRequest | null {
+  if (
+    payload.action !== 'compile_puzzle_draft' &&
+    payload.action !== 'save_puzzle_form_draft'
+  ) {
+    return null;
+  }
+
+  const workTitle = payload.workTitle?.trim() ?? '';
+  const workDescription = payload.workDescription?.trim() ?? '';
+  const pictureDescription =
+    payload.pictureDescription?.trim() || payload.promptText?.trim() || '';
+
+  return {
+    seedText: pictureDescription,
+    ...(workTitle ? { workTitle } : {}),
+    ...(workDescription ? { workDescription } : {}),
+    pictureDescription,
+    referenceImageSrc:
+      payload.action === 'compile_puzzle_draft'
+        ? (payload.referenceImageSrc ?? null)
+        : (payload.referenceImageSrc ?? null),
+    referenceImageSrcs: payload.referenceImageSrcs ?? [],
+    referenceImageAssetObjectId: payload.referenceImageAssetObjectId ?? null,
+    referenceImageAssetObjectIds: payload.referenceImageAssetObjectIds ?? [],
+    imageModel:
+      payload.action === 'compile_puzzle_draft'
+        ? (payload.imageModel ?? null)
+        : (payload.imageModel ?? null),
+    aiRedraw:
+      payload.action === 'compile_puzzle_draft'
+        ? (payload.aiRedraw ?? true)
+        : (payload.aiRedraw ?? true),
+  };
+}