diff --git a/packages/nuxt/src/core/schema.ts b/packages/nuxt/src/core/schema.ts
index ea569c833e..ba86a510e2 100644
--- a/packages/nuxt/src/core/schema.ts
+++ b/packages/nuxt/src/core/schema.ts
@@ -42,9 +42,7 @@ export default defineNuxtModule({
       ctx.references.push({ path: 'nuxt-config-schema' })
       ctx.references.push({ path: 'schema/nuxt.schema.d.ts' })
       if (nuxt.options._prepare) {
-        await nuxt.hooks.callHook('schema:beforeWrite', schema)
         await writeSchema(schema)
-        await nuxt.hooks.callHook('schema:written')
       }
     })
 
@@ -55,11 +53,7 @@ export default defineNuxtModule({
     })
 
     // Write schema after build to allow further modifications
-    nuxt.hooks.hook('build:done', async () => {
-      await nuxt.hooks.callHook('schema:beforeWrite', schema)
-      await writeSchema(schema)
-      await nuxt.hooks.callHook('schema:written')
-    })
+    nuxt.hooks.hook('build:done', () => writeSchema(schema))
 
     // Watch for schema changes in development mode
     if (nuxt.options.dev) {
@@ -72,9 +66,7 @@ export default defineNuxtModule({
       })
       const onChange = debounce(async () => {
         schema = await resolveSchema()
-        await nuxt.hooks.callHook('schema:beforeWrite', schema)
         await writeSchema(schema)
-        await nuxt.hooks.callHook('schema:written')
       })
       watcher.on('all', onChange)
       nuxt.hook('close', () => watcher.close())
@@ -126,6 +118,7 @@ export default defineNuxtModule({
     }
 
     async function writeSchema (schema: Schema) {
+      await nuxt.hooks.callHook('schema:beforeWrite', schema)
       // Write it to build dir
       await mkdir(resolve(nuxt.options.buildDir, 'schema'), { recursive: true })
       await writeFile(
@@ -161,6 +154,7 @@ declare module 'nuxt/schema' {
         'schema/nuxt.schema.d.ts'
       )
       await writeFile(typesPath, types, 'utf8')
+      await nuxt.hooks.callHook('schema:written')
     }
   }
 })
diff --git a/packages/nuxt/src/core/templates.ts b/packages/nuxt/src/core/templates.ts
index bef450ed9f..1d30448b83 100644
--- a/packages/nuxt/src/core/templates.ts
+++ b/packages/nuxt/src/core/templates.ts
@@ -204,15 +204,18 @@ ${app.configs.map((id: string, index: number) => `import ${`cfg${index}`} from $
 
 declare const inlineConfig = ${JSON.stringify(nuxt.options.appConfig, null, 2)}
 type ResolvedAppConfig = Defu<typeof inlineConfig, [${app.configs.map((_id: string, index: number) => `typeof cfg${index}`).join(', ')}]>
+type IsAny<T> = 0 extends 1 & T ? true : false
 
 type MergedAppConfig<Resolved extends Record<string, any>, Custom extends Record<string, any>> = {
   [K in keyof Resolved]: K extends keyof Custom
     ? Custom[K] extends Record<string, any>
-      ? Resolved[K] extends Record<string, any>
-        ? MergedAppConfig<Resolved[K], Custom[K]>
+      ? IsAny<Custom[K]> extends true
+        ? Resolved[K]
+        : Resolved[K] extends Record<string, any>
+          ? MergedAppConfig<Resolved[K], Custom[K]>
+          : Exclude<Custom[K], undefined>
         : Exclude<Custom[K], undefined>
-      : Exclude<Custom[K], undefined>
-    : Resolved[K]
+      : Resolved[K]
 }
 
 declare module 'nuxt/schema' {