diff --git a/src/components/component-definition.ts b/src/components/component-definition.ts
index df6e9c3..aa5e2de 100644
--- a/src/components/component-definition.ts
+++ b/src/components/component-definition.ts
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 import ts from 'typescript';
 
-import { extractDeclaration, stringifyType } from './type-utils';
+import { extractDeclaration, stringifyType } from '../shared/type-utils';
 import type {
   ComponentDefinition,
   ComponentFunction,
diff --git a/src/components/extract-value-descriptions.ts b/src/components/extract-value-descriptions.ts
new file mode 100644
index 0000000..6e49e66
--- /dev/null
+++ b/src/components/extract-value-descriptions.ts
@@ -0,0 +1,47 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+import ts from 'typescript';
+import { extractDeclaration } from '../shared/type-utils';
+import { ValueDescription } from './interfaces';
+
+export function extractValueDescriptions(type: ts.UnionOrIntersectionType, typeNode: ts.TypeNode | undefined) {
+  if (type.aliasSymbol) {
+    // Traverse from "variant: ButtonProps.Variant" to "type Variant = ..."
+    const aliasDeclaration = extractDeclaration(type.aliasSymbol);
+    if (ts.isTypeAliasDeclaration(aliasDeclaration)) {
+      typeNode = aliasDeclaration.type;
+    }
+  }
+
+  if (!typeNode) {
+    return [];
+  }
+
+  const maybeList = typeNode.getChildren()[0];
+  // based on similar code in typedoc
+  // https://github.com/TypeStrong/typedoc/blob/6090b3e31471cea3728db1b03888bca5703b437e/src/lib/converter/symbols.ts#L406-L438
+  if (maybeList.kind !== ts.SyntaxKind.SyntaxList) {
+    return [];
+  }
+  const rawComments: Array<string | undefined> = [];
+  let memberIndex = 0;
+  for (const child of maybeList.getChildren()) {
+    const text = child.getFullText();
+    if (text.includes('/**')) {
+      rawComments[memberIndex] = (rawComments[memberIndex] ?? '') + child.getFullText();
+    }
+
+    if (child.kind !== ts.SyntaxKind.BarToken) {
+      memberIndex++;
+    }
+  }
+  // Array.from to fix sparse array
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#array_methods_and_empty_slots
+  return Array.from(rawComments).map((comment): ValueDescription | undefined => {
+    if (!comment) {
+      return undefined;
+    }
+    const systemTags = Array.from(comment.matchAll(/@awsuiSystem\s+(\w+)/g), ([_, system]) => system);
+    return systemTags.length > 0 ? { systemTags } : undefined;
+  });
+}
diff --git a/src/components/extractor.ts b/src/components/extractor.ts
index 39b2517..5a79a9f 100644
--- a/src/components/extractor.ts
+++ b/src/components/extractor.ts
@@ -8,7 +8,7 @@ import {
   isOptional,
   stringifyType,
   unwrapNamespaceDeclaration,
-} from './type-utils';
+} from '../shared/type-utils';
 
 export interface ExtractedDescription {
   text: string | undefined;
diff --git a/src/components/index.ts b/src/components/index.ts
index 877eeef..b7ff56e 100644
--- a/src/components/index.ts
+++ b/src/components/index.ts
@@ -9,7 +9,7 @@ import { buildComponentDefinition } from './component-definition';
 import { extractDefaultValues, extractExports, extractFunctions, extractProps } from './extractor';
 import type { ComponentDefinition } from './interfaces';
 import { bootstrapTypescriptProject } from '../shared/bootstrap';
-import { extractDeclaration, getDescription } from './type-utils';
+import { extractDeclaration, getDescription } from '../shared/type-utils';
 
 function componentNameFromPath(componentPath: string) {
   const dashCaseName = pathe.basename(pathe.dirname(componentPath));
diff --git a/src/components/object-definition.ts b/src/components/object-definition.ts
index 1737eff..73f8e95 100644
--- a/src/components/object-definition.ts
+++ b/src/components/object-definition.ts
@@ -2,7 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 import ts from 'typescript';
 import type { TypeDefinition, UnionTypeDefinition, ValueDescription } from './interfaces';
-import { extractDeclaration, extractValueDescriptions, isOptional, stringifyType } from './type-utils';
+import { extractDeclaration, isOptional, stringifyType } from '../shared/type-utils';
+import { extractValueDescriptions } from './extract-value-descriptions';
 
 function isArrayType(type: ts.Type) {
   const symbol = type.getSymbol();
diff --git a/src/components/type-utils.ts b/src/shared/type-utils.ts
similarity index 64%
rename from src/components/type-utils.ts
rename to src/shared/type-utils.ts
index 2f0cca9..a3ea480 100644
--- a/src/components/type-utils.ts
+++ b/src/shared/type-utils.ts
@@ -1,7 +1,6 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 import ts from 'typescript';
-import { ValueDescription } from './interfaces';
 
 export function isOptional(type: ts.Type) {
   if (!type.isUnionOrIntersection()) {
@@ -62,48 +61,6 @@ export function getDescription(docComment: Array<ts.SymbolDisplayPart>, declarat
   };
 }
 
-export function extractValueDescriptions(type: ts.UnionOrIntersectionType, typeNode: ts.TypeNode | undefined) {
-  if (type.aliasSymbol) {
-    // Traverse from "variant: ButtonProps.Variant" to "type Variant = ..."
-    const aliasDeclaration = extractDeclaration(type.aliasSymbol);
-    if (ts.isTypeAliasDeclaration(aliasDeclaration)) {
-      typeNode = aliasDeclaration.type;
-    }
-  }
-
-  if (!typeNode) {
-    return [];
-  }
-
-  const maybeList = typeNode.getChildren()[0];
-  // based on similar code in typedoc
-  // https://github.com/TypeStrong/typedoc/blob/6090b3e31471cea3728db1b03888bca5703b437e/src/lib/converter/symbols.ts#L406-L438
-  if (maybeList.kind !== ts.SyntaxKind.SyntaxList) {
-    return [];
-  }
-  const rawComments: Array<string | undefined> = [];
-  let memberIndex = 0;
-  for (const child of maybeList.getChildren()) {
-    const text = child.getFullText();
-    if (text.includes('/**')) {
-      rawComments[memberIndex] = (rawComments[memberIndex] ?? '') + child.getFullText();
-    }
-
-    if (child.kind !== ts.SyntaxKind.BarToken) {
-      memberIndex++;
-    }
-  }
-  // Array.from to fix sparse array
-  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#array_methods_and_empty_slots
-  return Array.from(rawComments).map((comment): ValueDescription | undefined => {
-    if (!comment) {
-      return undefined;
-    }
-    const systemTags = Array.from(comment.matchAll(/@awsuiSystem\s+(\w+)/g), ([_, system]) => system);
-    return systemTags.length > 0 ? { systemTags } : undefined;
-  });
-}
-
 export function extractDeclaration(symbol: ts.Symbol) {
   const declarations = symbol.getDeclarations();
   if (!declarations || declarations.length === 0) {
diff --git a/src/test-utils/extractor.ts b/src/test-utils/extractor.ts
index cc4d930..c342654 100644
--- a/src/test-utils/extractor.ts
+++ b/src/test-utils/extractor.ts
@@ -8,7 +8,7 @@ import {
   isNullable,
   isOptional,
   stringifyType,
-} from '../components/type-utils';
+} from '../shared/type-utils';
 import { TestUtilsDoc } from './interfaces';
 
 function getInheritedFrom(declaration: ts.Declaration, currentClassName: string) {
diff --git a/src/test-utils/interfaces.ts b/src/test-utils/interfaces.ts
index f6bc6a7..410d920 100644
--- a/src/test-utils/interfaces.ts
+++ b/src/test-utils/interfaces.ts
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 export interface Parameter {
   name: string;
-  typeName?: string;
+  typeName: string;
   description?: string;
   flags: { isOptional?: boolean };
   defaultValue?: string;
@@ -15,7 +15,7 @@ interface TypeArgument {
 export interface TestUtilMethod {
   name: string;
   description?: string;
-  returnType?: {
+  returnType: {
     name: string;
     isNullable: boolean;
     typeArguments?: Array<TypeArgument>;
diff --git a/test/components/value-descriptions-extractor.test.ts b/test/components/value-descriptions-extractor.test.ts
index d4ce22f..2111ef8 100644
--- a/test/components/value-descriptions-extractor.test.ts
+++ b/test/components/value-descriptions-extractor.test.ts
@@ -2,7 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 import { expect, test } from 'vitest';
 import ts from 'typescript';
-import { extractDeclaration, extractValueDescriptions } from '../../src/components/type-utils';
+import { extractDeclaration } from '../../src/shared/type-utils';
+import { extractValueDescriptions } from '../../src/components/extract-value-descriptions';
 import { getInMemoryProject } from './test-helpers';
 
 function extractFromSource(source: string) {
diff --git a/test/components/type-utils.test.ts b/test/shared/type-utils.test.ts
similarity index 91%
rename from test/components/type-utils.test.ts
rename to test/shared/type-utils.test.ts
index 0be1016..db4aa93 100644
--- a/test/components/type-utils.test.ts
+++ b/test/shared/type-utils.test.ts
@@ -3,7 +3,7 @@
 
 import ts from 'typescript';
 import { test, expect } from 'vitest';
-import { printFlags } from '../../lib/components/type-utils';
+import { printFlags } from '../../lib/shared/type-utils';
 
 test('serialises node flags', () => {
   const flags = printFlags(