diff --git a/game-studio/src/locales/taskflow.en.ts b/game-studio/src/locales/taskflow.en.ts
index 6ccde46e..b43d891f 100644
--- a/game-studio/src/locales/taskflow.en.ts
+++ b/game-studio/src/locales/taskflow.en.ts
@@ -70,7 +70,7 @@ export default {
     tweakPathLabel: 'Path',
     tweakPathPlaceholder: 'e.g. /config/speed',
     tweakValueLabel: 'New value (JSON)',
-    tweakValuePlaceholder: 'e.g. {"speed": 5}',
+    tweakValuePlaceholder: 'JSON, e.g. "speed": 5',
     valueInvalid: 'New value is not valid JSON',
     emptyIntent: 'Please enter a description first',
     emptyPath: 'Please enter the path to modify',
diff --git a/game-studio/src/locales/taskflow.zh.ts b/game-studio/src/locales/taskflow.zh.ts
index f5b920ce..160be00f 100644
--- a/game-studio/src/locales/taskflow.zh.ts
+++ b/game-studio/src/locales/taskflow.zh.ts
@@ -82,7 +82,7 @@ export default {
     tweakPathLabel: '路径',
     tweakPathPlaceholder: '如 /config/speed',
     tweakValueLabel: '新值（JSON）',
-    tweakValuePlaceholder: '如 {"speed": 5}',
+    tweakValuePlaceholder: 'JSON,如 "speed": 5',
     valueInvalid: '新值不是合法 JSON，请检查',
     emptyIntent: '请先填写描述',
     emptyPath: '请填写要修改的路径',
diff --git a/game-studio/src/views/create/Modify.spec.ts b/game-studio/src/views/create/Modify.spec.ts
new file mode 100644
index 00000000..91663d38
--- /dev/null
+++ b/game-studio/src/views/create/Modify.spec.ts
@@ -0,0 +1,100 @@
+/**
+ * Modify.spec.ts —— 改进入口组件单测（plan 002 U6）。
+ * 验三方式提交各构造【契约合法】请求:扩展→extend / 改玩法→modify(regenerate-module) / 调参→modify(deterministic);
+ *   调参 JSON 非法 → Toast 不提交。经 mock store/router/vant 隔离。跑 `npm test`。
+ */
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { mount, flushPromises } from '@vue/test-utils'
+import { createI18n } from 'vue-i18n'
+
+// router push 间谍
+const push = vi.fn()
+const back = vi.fn()
+vi.mock('vue-router', () => ({ useRouter: () => ({ push, back }) }))
+
+// vant showToast 间谍（JSON 非法路径校验）。
+// 注:vant mock 工厂【直接返回】showToast(非嵌套在函数内),会被 vi.mock 提升到顶→须用 vi.hoisted 先建间谍,
+//   否则「Cannot access 'showToast' before initialization」(router/store 的 spy 嵌在函数内惰性引用故无此问题)。
+const { showToast } = vi.hoisted(() => ({ showToast: vi.fn() }))
+vi.mock('vant', () => ({ showToast }))
+
+// store 间谍（直接断言 Modify 构造的请求对象）
+const modify = vi.fn().mockResolvedValue({ id: 1002, gameId: 1 })
+const extend = vi.fn().mockResolvedValue({ id: 1003, gameId: 1 })
+vi.mock('../../store/create', () => ({ useCreateStore: () => ({ modify, extend }) }))
+
+import Modify from './Modify.vue'
+
+const i18n = createI18n({ legacy: false, locale: 'zh-CN', messages: { 'zh-CN': {} }, missingWarn: false, fallbackWarn: false })
+const AppButtonStub = {
+  props: ['disabled', 'loading', 'block', 'size', 'type'],
+  emits: ['click'],
+  template: '<button class="app-btn" :disabled="disabled" @click="$emit(\'click\')"><slot/></button>',
+}
+
+function mountModify() {
+  return mount(Modify, {
+    props: { versionId: '9001' },
+    global: { plugins: [i18n], stubs: { Icon: true, AppButton: AppButtonStub } },
+  })
+}
+
+describe('Modify.vue（改进入口·三方式→契约请求）', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    modify.mockResolvedValue({ id: 1002, gameId: 1 })
+    extend.mockResolvedValue({ id: 1003, gameId: 1 })
+  })
+
+  it('扩展(默认 tab) → extend({baseVersionId, intent}) + 跳进度页', async () => {
+    const w = mountModify()
+    await w.find('.modify-body textarea').setValue('再加一个 boss 关卡')
+    await w.find('.modify-foot .app-btn').trigger('click')
+    await flushPromises()
+    expect(extend).toHaveBeenCalledWith({ baseVersionId: 9001, intent: '再加一个 boss 关卡' })
+    expect(modify).not.toHaveBeenCalled()
+    expect(push).toHaveBeenCalledOnce()
+    expect(push.mock.calls[0][0].params.taskId).toBe('1003')
+  })
+
+  it('改玩法 tab → modify(regenerate-module, kind=behavior, payload.intent);目标空走默认首个 behavior 路径', async () => {
+    const w = mountModify()
+    await w.findAll('.modify-body .seg-item')[1].trigger('click') // 改玩法
+    await w.find('.modify-body textarea').setValue('把陨石改成会左右摇摆')
+    await w.find('.modify-foot .app-btn').trigger('click')
+    await flushPromises()
+    expect(modify).toHaveBeenCalledOnce()
+    const arg = modify.mock.calls[0][0]
+    expect(arg.mode).toBe('regenerate-module')
+    expect(arg.target.kind).toBe('behavior')
+    expect(arg.target.path).toBe('/gameDefinition/behaviors/0') // 空目标 → 默认首个
+    expect(arg.payload.intent).toBe('把陨石改成会左右摇摆')
+  })
+
+  it('调参 tab → modify(deterministic, kind/path, payload.value 解析 JSON)', async () => {
+    const w = mountModify()
+    await w.findAll('.modify-body .seg-item')[2].trigger('click') // 调参（默认 kind=config）
+    const inputs = w.findAll('.modify-body input')
+    await inputs[0].setValue('/config/speed') // path
+    await w.find('.modify-body textarea').setValue('{"speed": 5}')
+    await w.find('.modify-foot .app-btn').trigger('click')
+    await flushPromises()
+    expect(modify).toHaveBeenCalledOnce()
+    const arg = modify.mock.calls[0][0]
+    expect(arg.mode).toBe('deterministic')
+    expect(arg.target).toEqual({ kind: 'config', path: '/config/speed' })
+    expect(arg.payload.value).toEqual({ speed: 5 })
+  })
+
+  it('调参 JSON 非法 → showToast 且不提交', async () => {
+    const w = mountModify()
+    await w.findAll('.modify-body .seg-item')[2].trigger('click')
+    await w.findAll('.modify-body input')[0].setValue('/config/speed')
+    await w.find('.modify-body textarea').setValue('{速度: 5}') // 非法 JSON
+    await w.find('.modify-foot .app-btn').trigger('click')
+    await flushPromises()
+    expect(showToast).toHaveBeenCalledOnce()
+    expect(modify).not.toHaveBeenCalled()
+    expect(push).not.toHaveBeenCalled()
+  })
+})