diff --git a/src/csv-loader/loader.ts b/src/csv-loader/loader.ts
index 9dfa32b..a41074e 100644
--- a/src/csv-loader/loader.ts
+++ b/src/csv-loader/loader.ts
@@ -1,5 +1,5 @@
 import { parse } from 'csv-parse/sync';
-import { parseSchema, createValidator, parseValue } from '../index.js';
+import { parseSchema, createValidator, parseValue, schemaToTypeString } from '../index.js';
 import type { Schema, ReferenceSchema } from '../types.js';
 import * as fs from 'fs';
 import * as path from 'path';
@@ -403,7 +403,7 @@ function parseReferenceValue(
 }
 
 /**
- * Parser for reference values (extracts IDs from value string)
+ * Generate TypeScript interface for the CSV data
  */
 class ReferenceValueParser {
   private input: string;
@@ -490,54 +490,6 @@ class ReferenceValueParser {
   }
 }
 
-/**
- * Convert a schema to TypeScript type string
- */
-export function schemaToTypeString(schema: Schema, resourceNames?: Map<string, string>): string {
-  switch (schema.type) {
-    case 'string':
-      return 'string';
-    case 'number':
-    case 'int':
-    case 'float':
-      return 'number';
-    case 'boolean':
-      return 'boolean';
-    case 'stringLiteral':
-      return `"${schema.value}"`;
-    case 'union':
-      return schema.members.map(m => schemaToTypeString(m, resourceNames)).join(' | ');
-    case 'reference': {
-      const typeName = resourceNames?.get(schema.tableName) ||
-        schema.tableName.charAt(0).toUpperCase() + schema.tableName.slice(1);
-      const baseType = schema.isArray ? `${typeName}[]` : typeName;
-      return schema.isOptional ? `${baseType} | null` : baseType;
-    }
-    case 'array':
-      if (schema.element.type === 'tuple') {
-        const tupleElements = schema.element.elements.map((el) => {
-          const typeStr = schemaToTypeString(el.schema, resourceNames);
-          return el.name ? `${el.name}: ${typeStr}` : typeStr;
-        });
-        return `[${tupleElements.join(', ')}][]`;
-      }
-      // Wrap union types in parentheses to maintain correct precedence
-      const elementType = schemaToTypeString(schema.element, resourceNames);
-      if (schema.element.type === 'union') {
-        return `(${elementType})[]`;
-      }
-      return `${elementType}[]`;
-    case 'tuple':
-      const tupleElements = schema.elements.map((el) => {
-        const typeStr = schemaToTypeString(el.schema, resourceNames);
-        return el.name ? `${el.name}: ${typeStr}` : typeStr;
-      });
-      return `[${tupleElements.join(', ')}]`;
-    default:
-      return 'unknown';
-  }
-}
-
 /**
  * Generate TypeScript interface for the CSV data
  */
diff --git a/src/index.ts b/src/index.ts
index 78ff52b..616a37f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,5 @@
 import { parseSchema } from './parser';
-import { parseValue, createValidator } from './validator';
+import { parseValue, createValidator, schemaToTypeString } from './validator';
 import type { Schema, PrimitiveSchema, TupleSchema, ArraySchema, ReferenceSchema, StringLiteralSchema, UnionSchema, ParsedSchema } from './types';
 import { ParseError } from './parser';
 
@@ -14,6 +14,5 @@ export function defineSchema(schemaString: string): ParsedSchema {
   };
 }
 
-export { parseSchema, parseValue, createValidator, ParseError };
-export { schemaToTypeString } from './csv-loader/loader.js';
+export { parseSchema, parseValue, createValidator, ParseError, schemaToTypeString };
 export type { Schema, PrimitiveSchema, TupleSchema, ArraySchema, ReferenceSchema, StringLiteralSchema, UnionSchema, ParsedSchema };
diff --git a/src/validator.ts b/src/validator.ts
index 1380f60..6775d09 100644
--- a/src/validator.ts
+++ b/src/validator.ts
@@ -393,6 +393,50 @@ export function parseValue(schema: Schema, valueString: string): unknown {
   return value;
 }
 
+export function schemaToTypeString(schema: Schema, resourceNames?: Map<string, string>): string {
+  switch (schema.type) {
+    case 'string':
+      return 'string';
+    case 'number':
+    case 'int':
+    case 'float':
+      return 'number';
+    case 'boolean':
+      return 'boolean';
+    case 'stringLiteral':
+      return `"${schema.value}"`;
+    case 'union':
+      return schema.members.map(m => schemaToTypeString(m, resourceNames)).join(' | ');
+    case 'reference': {
+      const typeName = resourceNames?.get(schema.tableName) ||
+        schema.tableName.charAt(0).toUpperCase() + schema.tableName.slice(1);
+      const baseType = schema.isArray ? `${typeName}[]` : typeName;
+      return schema.isOptional ? `${baseType} | null` : baseType;
+    }
+    case 'array':
+      if (schema.element.type === 'tuple') {
+        const tupleElements = schema.element.elements.map((el) => {
+          const typeStr = schemaToTypeString(el.schema, resourceNames);
+          return el.name ? `${el.name}: ${typeStr}` : typeStr;
+        });
+        return `[${tupleElements.join(', ')}][]`;
+      }
+      const elementType = schemaToTypeString(schema.element, resourceNames);
+      if (schema.element.type === 'union') {
+        return `(${elementType})[]`;
+      }
+      return `${elementType}[]`;
+    case 'tuple':
+      const tupleElements = schema.elements.map((el) => {
+        const typeStr = schemaToTypeString(el.schema, resourceNames);
+        return el.name ? `${el.name}: ${typeStr}` : typeStr;
+      });
+      return `[${tupleElements.join(', ')}]`;
+    default:
+      return 'unknown';
+  }
+}
+
 export function createValidator(schema: Schema): (value: unknown) => boolean {
   return function validate(value: unknown): boolean {
     switch (schema.type) {