diff --git a/packages/ui-next/api.ts b/packages/ui-next/api.ts
new file mode 100644
index 000000000..930999c04
--- /dev/null
+++ b/packages/ui-next/api.ts
@@ -0,0 +1,2 @@
+export type { Context } from './src/context';
+export type { ComponentName } from './src/registry';
diff --git a/packages/ui-next/index.ts b/packages/ui-next/index.ts
index c3577227e..7611e4d5b 100644
--- a/packages/ui-next/index.ts
+++ b/packages/ui-next/index.ts
@@ -29,7 +29,7 @@ function hydroPlugins(): Plugin {
                     if (fs.existsSync(uiEntry)) entries.push(uiEntry);
                 }
                 if (!entries.length) return 'export default [];';
-                const imports = entries.map((e, i) => `import plugin${i} from '${e}';`).join('\n');
+                const imports = entries.map((e, i) => `import * as plugin${i} from '${e}';`).join('\n');
                 const exports = `export default [${entries.map((_, i) => `plugin${i}`).join(', ')}];`;
                 return `${imports}\n${exports}`;
             }
@@ -39,6 +39,7 @@ function hydroPlugins(): Plugin {
 
 export async function apply(ctx: Context) {
     if (process.env.HYDRO_CLI) return;
+    // 现在只是开发环境的实现，生产环境的实现还未完成
     const vite = await createServer({
         server: {
             middlewareMode: true,
diff --git a/packages/ui-next/package.json b/packages/ui-next/package.json
index 30d7d39b8..179b82a56 100644
--- a/packages/ui-next/package.json
+++ b/packages/ui-next/package.json
@@ -2,6 +2,8 @@
   "name": "@hydrooj/ui-next",
   "version": "0.0.0",
   "type": "module",
+  "main": "index.ts",
+  "types": "api.ts",
   "scripts": {
     "dev": "vite",
     "build": "tsc -b && vite build",
diff --git a/packages/ui-next/src/App.tsx b/packages/ui-next/src/App.tsx
index 6f74d94b5..b0fcd4e9e 100644
--- a/packages/ui-next/src/App.tsx
+++ b/packages/ui-next/src/App.tsx
@@ -1,5 +1,5 @@
-function App() {
-  return <div></div>;
-}
+import { Component } from './registry';
 
-export default App;
+const AppInner = Component('page:app', () => <div>app</div>);
+
+export default AppInner;
diff --git a/packages/ui-next/src/context.ts b/packages/ui-next/src/context.ts
new file mode 100644
index 000000000..eae2b5951
--- /dev/null
+++ b/packages/ui-next/src/context.ts
@@ -0,0 +1,16 @@
+import {
+  after, before, Component, patch,
+} from './registry';
+
+export interface Context {
+  before: typeof before;
+  after: typeof after;
+  patch: typeof patch;
+  register: typeof Component;
+}
+
+export function createContext(): Context {
+  return {
+    before, after, patch, register: Component,
+  };
+}
diff --git a/packages/ui-next/src/main.tsx b/packages/ui-next/src/main.tsx
index 8b9bc3ccd..7c8beca82 100644
--- a/packages/ui-next/src/main.tsx
+++ b/packages/ui-next/src/main.tsx
@@ -1,7 +1,16 @@
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
+import plugins from 'virtual:hydro-plugins';
 import App from './App';
+import { createContext } from './context';
 
-createRoot(document.getElementById('root')!).render(<StrictMode>
-  <App />
-</StrictMode>);
+const ctx = createContext();
+for (const plugin of plugins) {
+  plugin.apply(ctx);
+}
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);
diff --git a/packages/ui-next/src/registry.tsx b/packages/ui-next/src/registry.tsx
new file mode 100644
index 000000000..99105f9ba
--- /dev/null
+++ b/packages/ui-next/src/registry.tsx
@@ -0,0 +1,76 @@
+/* eslint-disable react-refresh/only-export-components */
+
+import React from 'react';
+
+type Scope = 'page' | 'component';
+export type ComponentName = `${Scope}:${string}`;
+
+interface BeforeAfterEntry {
+  id: string;
+  Comp: React.FC<any>;
+}
+
+interface PatchEntry {
+  id: string;
+  cb: (props: any) => any;
+}
+
+const registry = {
+  components: {} as Record<string, React.FC<any>>,
+  before: {} as Record<string, BeforeAfterEntry[]>,
+  after: {} as Record<string, BeforeAfterEntry[]>,
+  patch: {} as Record<string, PatchEntry[]>,
+};
+
+let idCounter = 0;
+function genId() { return `__auto_${++idCounter}`; }
+
+function upsert<T extends { id: string }>(list: T[], entry: T) {
+  const idx = list.findIndex((e) => e.id === entry.id);
+  if (idx !== -1) list[idx] = entry;
+  else list.push(entry);
+}
+
+export function Component<P extends Record<string, any>>(
+  name: ComponentName,
+  Inner: React.FC<P>,
+): React.FC<P> {
+  if (registry.components[name]) {
+    console.warn(`[Registry] Component "${name}" is being re-registered.`);
+  }
+  const Wrapped: React.FC<P> = (props) => {
+    let patched = props;
+    for (const { cb } of registry.patch[name] ?? []) {
+      try {
+        patched = cb(patched);
+      } catch (e) {
+        console.error(`[Registry] patch error in "${name}":`, e);
+      }
+    }
+    return (
+      <>
+        {(registry.before[name] ?? []).map(({ id, Comp }) => <Comp key={id} {...patched} />)}
+        <Inner {...patched} />
+        {(registry.after[name] ?? []).map(({ id, Comp }) => <Comp key={id} {...patched} />)}
+      </>
+    );
+  };
+  Wrapped.displayName = `Registry(${name})`;
+  registry.components[name] = Wrapped;
+  return Wrapped;
+}
+
+export function before(name: ComponentName, Comp: React.FC<any>, id?: string) {
+  const list = registry.before[name] ??= [];
+  upsert(list, { id: id ?? genId(), Comp });
+}
+
+export function after(name: ComponentName, Comp: React.FC<any>, id?: string) {
+  const list = registry.after[name] ??= [];
+  upsert(list, { id: id ?? genId(), Comp });
+}
+
+export function patch(name: ComponentName, cb: (props: any) => any, id?: string) {
+  const list = registry.patch[name] ??= [];
+  upsert(list, { id: id ?? genId(), cb });
+}
diff --git a/packages/ui-next/src/vite-env.d.ts b/packages/ui-next/src/vite-env.d.ts
index 11f02fe2a..617da4f3f 100644
--- a/packages/ui-next/src/vite-env.d.ts
+++ b/packages/ui-next/src/vite-env.d.ts
@@ -1 +1,7 @@
 /// <reference types="vite/client" />
+
+declare module 'virtual:hydro-plugins' {
+    import type { RegistryContext } from './registry';
+    const plugins: Array<{ apply: (ctx: RegistryContext) => void }>;
+    export default plugins;
+}