diff --git a/frontend-vue/src/shared/api-field-schemas.ts b/frontend-vue/src/shared/api-field-schemas.ts
new file mode 100644
index 00000000..c5436987
--- /dev/null
+++ b/frontend-vue/src/shared/api-field-schemas.ts
@@ -0,0 +1,70 @@
+/**
+ * API 高频响应 schema 注册表（Task 27）。
+ *
+ * 为 task/result 核心响应与各业务模块注册字段 schema，供
+ * createApiFieldCompatChecker 在契约测试与联调前做字段漂移检查。
+ * 模块级 schema 目前复用 task+result 组合，后续某模块有独特字段时
+ * 在其定义内覆盖/追加即可，无需改动检查器。
+ */
+import { createApiFieldCompatChecker, type ApiFieldSpec } from './api-field-compat.ts'
+
+export interface ApiFieldSchemaDef {
+  /** schema 版本号，变更时递增 */
+  version: number
+  /** 字段名 → 规格 */
+  schema: Record<string, ApiFieldSpec>
+}
+
+/** task 核心响应字段 */
+export const taskCoreSchema: Record<string, ApiFieldSpec> = {
+  taskId: { type: 'number', required: true },
+  status: { type: 'string', required: true },
+  progress: { type: 'number' },
+  message: { type: 'string' },
+  resultId: { type: 'number' },
+}
+
+/** 结果文件阶段字段（与 ResultFilePhase 对应，全部可选） */
+export const resultFileSchema: Record<string, ApiFieldSpec> = {
+  fileStatus: { type: 'string' },
+  fileReady: { type: 'boolean' },
+  fileProgress: { type: 'number' },
+  fileProgressLabel: { type: 'string' },
+  fileProgressStage: { type: 'string' },
+  downloadUrl: { type: 'string' },
+  freshDownloadUrl: { type: 'string' },
+}
+
+/** task + result 组合 schema */
+export const taskWithResultSchema: Record<string, ApiFieldSpec> = {
+  ...taskCoreSchema,
+  ...resultFileSchema,
+}
+
+const BUSINESS_MODULES = [
+  'dedupe', 'split', 'convert', 'publish', 'similar-asin', 'appearance-patent',
+  'delete-brand', 'price-track', 'shop-match', 'query-asin', 'withdraw',
+  'collect-data', 'image-video',
+] as const
+
+export const apiFieldSchemas: Record<string, ApiFieldSchemaDef> = {
+  task: { version: 1, schema: taskCoreSchema },
+  result: { version: 1, schema: resultFileSchema },
+  'task-result': { version: 1, schema: taskWithResultSchema },
+}
+
+for (const module of BUSINESS_MODULES) {
+  apiFieldSchemas[module] = { version: 1, schema: taskWithResultSchema }
+}
+
+export function getApiFieldSchema(name: string): ApiFieldSchemaDef | null {
+  return apiFieldSchemas[name] ?? null
+}
+
+export function createModuleFieldChecker(module: string) {
+  const def = getApiFieldSchema(module)
+  if (!def) {
+    throw new Error(`未注册的模块: ${module}`)
+  }
+  return createApiFieldCompatChecker({ schema: def.schema })
+}
diff --git a/frontend-vue/tests/api-field-schemas.test.ts b/frontend-vue/tests/api-field-schemas.test.ts
new file mode 100644
index 00000000..7f84dab6
--- /dev/null
+++ b/frontend-vue/tests/api-field-schemas.test.ts
@@ -0,0 +1,104 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import {
+  taskCoreSchema,
+  resultFileSchema,
+  taskWithResultSchema,
+  apiFieldSchemas,
+  getApiFieldSchema,
+  createModuleFieldChecker,
+} from '../src/shared/api-field-schemas.ts'
+
+test('test_schema_task_required_fields', () => {
+  assert.equal(taskCoreSchema.taskId.type, 'number')
+  assert.equal(taskCoreSchema.taskId.required, true)
+  assert.equal(taskCoreSchema.status.type, 'string')
+  assert.equal(taskCoreSchema.status.required, true)
+  assert.equal(taskCoreSchema.progress.type, 'number')
+  assert.equal(taskCoreSchema.progress.required, undefined)
+})
+
+test('test_schema_result_required_fields', () => {
+  assert.equal(resultFileSchema.fileStatus.type, 'string')
+  assert.equal(resultFileSchema.fileReady.type, 'boolean')
+  assert.equal(resultFileSchema.fileProgress.type, 'number')
+  assert.equal(resultFileSchema.downloadUrl.type, 'string')
+  assert.equal(resultFileSchema.freshDownloadUrl.type, 'string')
+  assert.ok('fileProgressLabel' in resultFileSchema)
+  assert.ok('fileProgressStage' in resultFileSchema)
+})
+
+test('test_checker_passes_valid', () => {
+  const checker = createModuleFieldChecker('task')
+  const violations = checker.check({ taskId: 1, status: 'SUCCESS', progress: 100 })
+  assert.deepEqual(violations, [])
+  assert.equal(checker.lastResult().passed, true)
+})
+
+test('test_checker_missing_required', () => {
+  const checker = createModuleFieldChecker('task')
+  const violations = checker.check({ taskId: 1 })
+  assert.equal(violations.length, 1)
+  assert.equal(violations[0].field, 'status')
+  assert.equal(violations[0].kind, 'missing')
+})
+
+test('test_checker_wrong_type', () => {
+  const checker = createModuleFieldChecker('task')
+  const violations = checker.check({ taskId: 'x', status: 'SUCCESS' })
+  assert.equal(violations.length, 1)
+  assert.equal(violations[0].field, 'taskId')
+  assert.equal(violations[0].kind, 'type')
+  assert.equal(violations[0].expected, 'number')
+  assert.equal(violations[0].actual, 'string')
+})
+
+test('test_checker_batch', () => {
+  const checker = createModuleFieldChecker('task-result')
+  checker.checkBatch([
+    { taskId: 1, status: 'SUCCESS', fileStatus: 'SUCCESS', fileReady: true },
+    { taskId: 2, status: 'RUNNING', downloadUrl: '/files/2.zip' },
+    { taskId: 'bad', status: 3 },
+  ])
+  const stats = checker.stats()
+  assert.equal(stats.checkedCount, 3)
+  assert.equal(stats.violationCount, 2)
+  assert.equal(checker.lastResult().passed, false)
+})
+
+test('test_schema_registered_modules', () => {
+  const modules = [
+    'task', 'result', 'task-result',
+    'dedupe', 'split', 'convert', 'publish', 'similar-asin', 'appearance-patent',
+    'delete-brand', 'price-track', 'shop-match', 'query-asin', 'withdraw',
+    'collect-data', 'image-video',
+  ]
+  for (const name of modules) {
+    const def = getApiFieldSchema(name)
+    assert.ok(def, `${name} 应注册 schema`)
+    assert.ok(Object.keys(def.schema).length > 0, `${name} schema 非空`)
+  }
+  assert.equal(getApiFieldSchema('not-a-module'), null)
+})
+
+test('test_schema_versioned', () => {
+  const taskDef = apiFieldSchemas.task
+  assert.equal(typeof taskDef.version, 'number')
+  assert.ok(taskDef.version >= 1)
+  const resultDef = apiFieldSchemas.result
+  assert.ok(resultDef.version >= 1)
+  // 版本号唯一性：不同注册项允许同版本，但同模块只能有一个定义
+  const versions = Object.values(apiFieldSchemas).map((d) => d.version)
+  assert.ok(versions.every((v) => Number.isInteger(v) && v >= 1))
+})
+
+test('test_module_checker_uses_task_schema', () => {
+  const checker = createModuleFieldChecker('dedupe')
+  const violations = checker.check({ taskId: 1, status: 'SUCCESS', fileReady: true })
+  assert.deepEqual(violations, [], '模块 schema 应含 task + result 字段')
+  assert.deepEqual(checker.checkedFields(), Object.keys(taskWithResultSchema))
+})
+
+test('test_checker_unknown_module_throws', () => {
+  assert.throws(() => createModuleFieldChecker('ghost-module'), /未注册的模块/)
+})