diff --git a/packages/contracts/src/route-manifest.ts b/packages/contracts/src/route-manifest.ts
index 18a0db2..587583b 100644
--- a/packages/contracts/src/route-manifest.ts
+++ b/packages/contracts/src/route-manifest.ts
@@ -1,7 +1,11 @@
 export const ROUTE_MANIFEST_VERSION = 1
 
-export type RouteKind = 'html' | 'asset' | 'redirect' | 'gone' | 'dynamic' | 'unresolved'
-export type QueryPolicy = 'ignore' | 'exact' | 'preserve' | 'dynamic'
+// 单源派生冻结锁：类型从 as const 数组派生，增删值只改一处，数组与联合类型不再并行维护（防静默漂移）
+export const KINDS = ['html', 'asset', 'redirect', 'gone', 'dynamic', 'unresolved'] as const
+export type RouteKind = (typeof KINDS)[number]
+
+export const QUERY_POLICIES = ['ignore', 'exact', 'preserve', 'dynamic'] as const
+export type QueryPolicy = (typeof QUERY_POLICIES)[number]
 
 export interface RouteManifestRoute {
   exact_key: string
@@ -24,10 +28,8 @@ export interface RouteManifest {
   routes: RouteManifestRoute[]
 }
 
-const KINDS = ['html', 'asset', 'redirect', 'gone', 'dynamic', 'unresolved'] as const
-const QUERY_POLICIES = ['ignore', 'exact', 'preserve', 'dynamic'] as const
-
-// 守卫查值类型（不只查键存在）：版本号、顶层必填字符串、routes 元素的枚举与标量类型全部校验
+// 守卫查值类型（不只查键存在）：版本号、顶层必填字符串、routes 元素的枚举与标量类型全部校验；
+// status 做结构域校验（整数 + 100–599），kind↔status 语义耦合留在消费方
 export function isRouteManifest(v: unknown): v is RouteManifest {
   if (typeof v !== 'object' || v === null) return false
   const m = v as RouteManifest
@@ -37,9 +39,10 @@ export function isRouteManifest(v: unknown): v is RouteManifest {
     && typeof m.origin === 'string'
     && typeof m.generated_from_route_snapshot_hash === 'string'
     && Array.isArray(m.routes) && m.routes.every((r) =>
-      typeof r.exact_key === 'string'
-      && (QUERY_POLICIES as readonly string[]).includes(r.query_policy)
-      && (KINDS as readonly string[]).includes(r.kind)
-      && typeof r.status === 'number'
+      typeof r === 'object' && r !== null
+      && typeof r.exact_key === 'string'
+      && QUERY_POLICIES.includes(r.query_policy)
+      && KINDS.includes(r.kind)
+      && Number.isInteger(r.status) && r.status >= 100 && r.status <= 599
       && typeof r.indexable === 'boolean')
 }
diff --git a/packages/contracts/src/theme-manifest.ts b/packages/contracts/src/theme-manifest.ts
index 1535c07..e284116 100644
--- a/packages/contracts/src/theme-manifest.ts
+++ b/packages/contracts/src/theme-manifest.ts
@@ -1,6 +1,8 @@
 export const THEME_MANIFEST_VERSION = 1
 
 export interface ThemeManifest {
+  // 契约刻意放宽：spec §9.1 的 'pilot-minimal' 字面量属于 pilot 主题自身的 manifest 文件；
+  // 共享注册契约面向多主题（第二个主题不得要求改本契约），故 key 为 string——勿"纠正"回字面量。
   key: string
   version: string
   renderContractVersion: string
diff --git a/packages/contracts/test/manifests.test.ts b/packages/contracts/test/manifests.test.ts
index 3b24d7f..04de742 100644
--- a/packages/contracts/test/manifests.test.ts
+++ b/packages/contracts/test/manifests.test.ts
@@ -57,9 +57,10 @@ describe('RouteManifest 守卫拒绝路径', () => {
     expect(isRouteManifest({ ...validRouteManifest, routes: 'x' })).toBe(false)
   })
 
-  it('routes 元素缺 exact_key 拒绝', () => {
+  it('routes 元素缺 exact_key / 元素为 null 拒绝', () => {
     const { exact_key: _omit, ...route } = validRouteManifest.routes[0]
     expect(isRouteManifest({ ...validRouteManifest, routes: [route] })).toBe(false)
+    expect(isRouteManifest({ ...validRouteManifest, routes: [null] })).toBe(false)
   })
 
   it('status 非数字拒绝（status: "200"）', () => {
@@ -69,6 +70,20 @@ describe('RouteManifest 守卫拒绝路径', () => {
     })).toBe(false)
   })
 
+  it('status 非整数拒绝（200.5）', () => {
+    expect(isRouteManifest({
+      ...validRouteManifest,
+      routes: [{ ...validRouteManifest.routes[0], status: 200.5 }],
+    })).toBe(false)
+  })
+
+  it('status 超域拒绝（999）', () => {
+    expect(isRouteManifest({
+      ...validRouteManifest,
+      routes: [{ ...validRouteManifest.routes[0], status: 999 }],
+    })).toBe(false)
+  })
+
   it('indexable 非布尔拒绝（indexable: 1）', () => {
     expect(isRouteManifest({
       ...validRouteManifest,