diff --git a/package.json b/package.json
index 862b65d..9680124 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "postbuild": "next-sitemap",
     "build-debug": "cross-env NODE_OPTIONS='--inspect' next build",
     "start": "serve out",
-    "lint": "next lint"
+    "lint": "next lint",
+    "download-data": "node scripts/download_data.mjs"
   },
   "dependencies": {
     "@docsearch/react": "^3.5.2",
diff --git a/src/build-data/Guide.ts b/src/build-data/Guide.ts
index 4a661e3..085d7f5 100644
--- a/src/build-data/Guide.ts
+++ b/src/build-data/Guide.ts
@@ -168,6 +168,8 @@ export type GuideIndex = {
   pageIndices: Record<string, Array<any>>;
 
   animations: Record<string, AnimationInfo>;
+
+  defaultConfigValues: Record<string, string>;
 };
 
 export type NavigationNode = {
diff --git a/src/build-data/index.ts b/src/build-data/index.ts
index 21641b3..232e78b 100644
--- a/src/build-data/index.ts
+++ b/src/build-data/index.ts
@@ -1,6 +1,6 @@
 import { join as joinPath } from "node:path";
 import { readFile, stat } from "node:fs/promises";
-import { Guide } from "./Guide.ts";
+import { Guide, GuideIndex } from "./Guide.ts";
 import { getGuideVersionBySlug } from "./GuideVersionIndex.ts";
 
 type CachedGuide = {
@@ -25,7 +25,12 @@ export async function getGuide(versionSlug: string): Promise<Guide> {
     return cachedData.guide;
   }
 
-  const guideData = JSON.parse(await readFile(dataPath, { encoding: "utf-8" }));
+  const guideData: GuideIndex = JSON.parse(
+    await readFile(dataPath, { encoding: "utf-8" }),
+  );
+
+  // Fix up older versions. Introduced in late 1.20.4
+  guideData.defaultConfigValues ??= {};
 
   const guide = new Guide(
     versionInfo.baseUrl,
diff --git a/src/components/guide-elements/AE2ConfigValue.tsx b/src/components/guide-elements/AE2ConfigValue.tsx
new file mode 100644
index 0000000..bc3088e
--- /dev/null
+++ b/src/components/guide-elements/AE2ConfigValue.tsx
@@ -0,0 +1,21 @@
+import React from "react";
+import { CustomGuideElementProps } from "@component/CustomGuideElementProps.ts";
+import ErrorText from "@component/ErrorText.tsx";
+
+export interface AE2ConfigValueProps extends CustomGuideElementProps {
+  name: string;
+}
+
+function Ae2ConfigValue({ guide, name }: AE2ConfigValueProps) {
+  if (!name) {
+    return <ErrorText>Missing config value name</ErrorText>;
+  }
+  const configValue = guide.index.defaultConfigValues[name];
+  if (!configValue) {
+    return <ErrorText>Unknown config value: {name}</ErrorText>;
+  }
+
+  return configValue;
+}
+
+export default Ae2ConfigValue;
diff --git a/src/components/page-compiler/customElement.ts b/src/components/page-compiler/customElement.ts
index 07bee5f..f1fceb4 100644
--- a/src/components/page-compiler/customElement.ts
+++ b/src/components/page-compiler/customElement.ts
@@ -17,6 +17,7 @@ import { getAttributes } from "./mdxUtils.ts";
 import CategoryIndex from "@component/guide-elements/CategoryIndex";
 import { CustomGuideElementProps } from "@component/CustomGuideElementProps.ts";
 import SubPages from "@component/guide-elements/SubPages.tsx";
+import AE2ConfigValue from "@component/guide-elements/AE2ConfigValue.tsx";
 
 type CustomElementCompiler = (
   context: CompileContext,
@@ -40,6 +41,7 @@ const components: Record<string, CustomGuideComponent> = {
   RecipeFor,
   Row,
   SubPages,
+  "ae2:ConfigValue": AE2ConfigValue,
 };
 
 const customCompilers: Record<string, CustomElementCompiler> = {