diff --git a/apps/site/app/components/InteractiveDemo.tsx b/apps/site/app/components/InteractiveDemo.tsx
index e59adf9b5c..62a48be5d9 100644
--- a/apps/site/app/components/InteractiveDemo.tsx
+++ b/apps/site/app/components/InteractiveDemo.tsx
@@ -1,7 +1,7 @@
 'use client';
 
 import React, { useMemo } from 'react';
-import { SchemaRenderer, SchemaRendererContext } from '@object-ui/react';
+import { SchemaRenderer, SchemaRendererContext, toRenderableSchema } from '@object-ui/react';
 import { SidebarProvider } from '@object-ui/components';
 // Registers `page-header` & friends — see the module header (objectui#3787).
 import './registerLayoutBlocks';
@@ -71,7 +71,7 @@ export function InteractiveDemo({
                     <DemoProvider>
                       <SidebarProvider className="min-h-0 w-full" defaultOpen={false}>
                         <div className="w-full">
-                          <SchemaRenderer schema={example.schema} />
+                          <SchemaRenderer schema={toRenderableSchema(example.schema)} />
                         </div>
                       </SidebarProvider>
                     </DemoProvider>
@@ -116,7 +116,7 @@ export function InteractiveDemo({
             <DemoProvider>
               <SidebarProvider className="min-h-0 w-full" defaultOpen={false}>
                 <div className="w-full">
-                  <SchemaRenderer schema={schema} />
+                  <SchemaRenderer schema={toRenderableSchema(schema)} />
                 </div>
               </SidebarProvider>
             </DemoProvider>
diff --git a/apps/site/app/components/LiveSplitDemo.tsx b/apps/site/app/components/LiveSplitDemo.tsx
index f14ae5e90c..ac73a33d12 100644
--- a/apps/site/app/components/LiveSplitDemo.tsx
+++ b/apps/site/app/components/LiveSplitDemo.tsx
@@ -17,7 +17,7 @@ import React, {
   useRef,
   useState,
 } from 'react';
-import { SchemaRenderer, SchemaRendererContext } from '@object-ui/react';
+import { SchemaRenderer, SchemaRendererContext, toRenderableSchema } from '@object-ui/react';
 import { SidebarProvider } from '@object-ui/components';
 import type { SchemaNode } from '@object-ui/core';
 import {
@@ -283,7 +283,7 @@ export function LiveSplitDemo({
                   defaultOpen={false}
                 >
                   <div className="w-full">
-                    <SchemaRenderer schema={lastValidSchema} />
+                    <SchemaRenderer schema={toRenderableSchema(lastValidSchema)} />
                   </div>
                 </SidebarProvider>
               </SchemaRendererContext.Provider>
diff --git a/apps/site/app/components/SchemaThumbnail.tsx b/apps/site/app/components/SchemaThumbnail.tsx
index af8279b189..27483bb42b 100644
--- a/apps/site/app/components/SchemaThumbnail.tsx
+++ b/apps/site/app/components/SchemaThumbnail.tsx
@@ -16,7 +16,7 @@ import React, {
   useRef,
   useState,
 } from 'react';
-import { SchemaRenderer, SchemaRendererContext } from '@object-ui/react';
+import { SchemaRenderer, SchemaRendererContext, toRenderableSchema } from '@object-ui/react';
 import { SidebarProvider } from '@object-ui/components';
 import type { SchemaNode } from '@object-ui/core';
 // Registers `page-header` & friends — see the module header (objectui#3787).
@@ -135,7 +135,7 @@ export function SchemaThumbnail({
             <SchemaRendererContext.Provider value={ctx}>
               <SidebarProvider className="min-h-0 w-full" defaultOpen={false}>
                 <div className="w-full p-4">
-                  <SchemaRenderer schema={schema} />
+                  <SchemaRenderer schema={toRenderableSchema(schema)} />
                 </div>
               </SidebarProvider>
             </SchemaRendererContext.Provider>
diff --git a/apps/site/app/playground/page.tsx b/apps/site/app/playground/page.tsx
index 28a605f110..901991d863 100644
--- a/apps/site/app/playground/page.tsx
+++ b/apps/site/app/playground/page.tsx
@@ -1,7 +1,7 @@
 'use client';
 
 import React, { useState, useEffect } from 'react';
-import { SchemaRenderer } from '@object-ui/react';
+import { SchemaRenderer, toRenderableSchema } from '@object-ui/react';
 import type { SchemaNode } from '@object-ui/core';
 import dynamic from 'next/dynamic';
 import { ObjectUIProvider } from '@/app/components/ObjectUIProvider';
@@ -1410,7 +1410,7 @@ export default function PlaygroundPage() {
                     viewMode === 'mobile' ? 'min-h-[667px]' : viewMode === 'tablet' ? 'min-h-[600px]' : ''
                   }`}>
                     <div className="p-6">
-                      <SchemaRenderer schema={schema} />
+                      <SchemaRenderer schema={toRenderableSchema(schema)} />
                     </div>
                   </div>
                 </div>
diff --git a/apps/site/package.json b/apps/site/package.json
index 9dbb3fdcd6..eb541f8b22 100644
--- a/apps/site/package.json
+++ b/apps/site/package.json
@@ -8,7 +8,7 @@
     "lint": "eslint .",
     "dev": "next dev",
     "start": "next start",
-    "types:check": "fumadocs-mdx && next typegen && tsc --noEmit",
+    "type-check": "fumadocs-mdx && next typegen && tsc --noEmit",
     "postinstall": "fumadocs-mdx"
   },
   "dependencies": {
diff --git a/scripts/check-type-check-coverage.mjs b/scripts/check-type-check-coverage.mjs
index ec29a4e000..9a87ff6d40 100644
--- a/scripts/check-type-check-coverage.mjs
+++ b/scripts/check-type-check-coverage.mjs
@@ -90,17 +90,25 @@ export const NOT_COMPILED = ["@object-ui/example-hello-world"];
 //
 // That escape hatch is exactly how this exemption could rot, so it is verified
 // on every run rather than trusted: setting `ignoreBuildErrors` fails the guard.
-export const CHECKED_BY_OWN_BUILD = {
-  "@object-ui/site": {
-    build: "next build",
-    // Caveat worth knowing: the `docs` CI job runs this build only when
-    // `apps/site/` or `content/` changed (plus every push to main). A PR that
-    // only touches a workspace package in `transpilePackages` therefore does
-    // not re-check the site until it lands. Closing that would mean paying a
-    // Next build on many more PRs — a cost/coverage call, not a silent gap.
-    verifyNoIgnoreBuildErrors: "apps/site/next.config.mjs",
-  },
-};
+//
+// Empty since objectui#4617, and worth keeping that way. Its sole entry was
+// `@object-ui/site`, and the caveat that entry carried — "the `docs` CI job runs
+// this build only when `apps/site/` or `content/` changed", so a PR touching only
+// a `transpilePackages` workspace package "does not re-check the site until it
+// lands" — turned out to describe a live main-red, not a tolerable cost/coverage
+// call. PR #4608 widened `SchemaNode` to a union, touched no file under
+// `apps/site/`, and merged green; the site's five `SchemaRenderer` call sites
+// stopped compiling the moment it landed and `Build Docs` was red on every push
+// to `main` for the next ~5 hours. The exemption was honest about WHAT checked
+// the package and silent about WHEN, and "when" was the half that mattered.
+//
+// The site now carries a real `type-check` script, so it is audited by the same
+// ratchet as every other package and the `Type Check` job reaches it on every PR.
+// `verifyNoIgnoreBuildErrors` retires with the entry rather than being orphaned:
+// its whole job was protecting a coverage claim that rested on `next build`, and
+// coverage no longer rests there — `tsc --noEmit` runs directly, so setting
+// `ignoreBuildErrors` can no longer hide a type error from CI.
+export const CHECKED_BY_OWN_BUILD = {};
 
 // ── Known gaps: tests that nothing type-checks ───────────────────────────────
 // Packages whose tests do not compile yet, so they cannot chain a