diff --git a/packages/code-gen/src/database/generator.js b/packages/code-gen/src/database/generator.js
index 47960bf233..cf7ce6b164 100644
--- a/packages/code-gen/src/database/generator.js
+++ b/packages/code-gen/src/database/generator.js
@@ -1,10 +1,9 @@
 import { AppError, noop } from "@compas/stdlib";
 import { structureModels } from "../processors/models.js";
-import { stringFormatNameForError } from "../string-format.js";
 import { targetCustomSwitch } from "../target/switcher.js";
 import { typesCacheGet } from "../types/cache.js";
 import { typesGeneratorUseTypeName } from "../types/generator.js";
-import { upperCaseFirst } from "../utils.js";
+import { stringFormatNameForError, upperCaseFirst } from "../utils.js";
 import {
   validatorGeneratorGenerateValidator,
   validatorGetNameAndImport,
diff --git a/packages/code-gen/src/database/postgres.js b/packages/code-gen/src/database/postgres.js
index 1687e3efe4..0eaa696f9c 100644
--- a/packages/code-gen/src/database/postgres.js
+++ b/packages/code-gen/src/database/postgres.js
@@ -16,9 +16,8 @@ import {
 import { structureModels } from "../processors/models.js";
 import { referenceUtilsGetProperty } from "../processors/reference-utils.js";
 import { structureResolveReference } from "../processors/structure.js";
-import { stringFormatNameForError } from "../string-format.js";
 import { typesOptionalityIsOptional } from "../types/optionality.js";
-import { upperCaseFirst } from "../utils.js";
+import { stringFormatNameForError, upperCaseFirst } from "../utils.js";
 
 /**
  * Write the DDL out for Postgres
diff --git a/packages/code-gen/src/errors.d.ts b/packages/code-gen/src/errors.d.ts
deleted file mode 100644
index 5b81855989..0000000000
--- a/packages/code-gen/src/errors.d.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Combine the messages of the provided errors and throw a new error.
- *
- * Early returns if an empty array is provided.
- *
- * Other supported properties:
- * - messages: expected to be a string[]
- *
- * @param {import("@compas/stdlib").AppError[]} errors
- * @returns {void}
- */
-export function errorsThrowCombinedError(
-  errors: import("@compas/stdlib").AppError[],
-): void;
-//# sourceMappingURL=errors.d.ts.map
diff --git a/packages/code-gen/src/errors.js b/packages/code-gen/src/errors.js
deleted file mode 100644
index 0c9f2bfa3a..0000000000
--- a/packages/code-gen/src/errors.js
+++ /dev/null
@@ -1,34 +0,0 @@
-import { AppError } from "@compas/stdlib";
-
-/**
- * Combine the messages of the provided errors and throw a new error.
- *
- * Early returns if an empty array is provided.
- *
- * Other supported properties:
- * - messages: expected to be a string[]
- *
- * @param {import("@compas/stdlib").AppError[]} errors
- * @returns {void}
- */
-export function errorsThrowCombinedError(errors) {
-  if (errors.length === 0) {
-    return;
-  }
-
-  const messages = [];
-
-  for (const err of errors) {
-    if (err.info?.message) {
-      messages.push(err.info.message);
-    } else if (err.info?.messages) {
-      messages.push(...err.info.messages);
-    } else {
-      messages.push(AppError.format(err));
-    }
-  }
-
-  throw AppError.serverError({
-    messages,
-  });
-}
diff --git a/packages/code-gen/src/processors/any-of.js b/packages/code-gen/src/processors/any-of.js
index 533c5bc5a9..30cdfb5270 100644
--- a/packages/code-gen/src/processors/any-of.js
+++ b/packages/code-gen/src/processors/any-of.js
@@ -1,6 +1,6 @@
 import { AppError, isNil } from "@compas/stdlib";
-import { stringFormatNameForError } from "../string-format.js";
 import { typesOptionalityIsOptional } from "../types/optionality.js";
+import { stringFormatNameForError } from "../utils.js";
 import { referenceUtilsGetProperty } from "./reference-utils.js";
 import { structureNamedTypes, structureResolveReference } from "./structure.js";
 import { typeDefinitionTraverse } from "./type-definition-traverse.js";
diff --git a/packages/code-gen/src/processors/crud-validation.js b/packages/code-gen/src/processors/crud-validation.js
index b3ee3da19d..75376fffe9 100644
--- a/packages/code-gen/src/processors/crud-validation.js
+++ b/packages/code-gen/src/processors/crud-validation.js
@@ -1,6 +1,8 @@
 import { AppError, isNil } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import {
   crudInformationGetHasCustomReadableType,
   crudInformationGetModel,
diff --git a/packages/code-gen/src/processors/model-keys.js b/packages/code-gen/src/processors/model-keys.js
index 8cdcf0d310..cd1239e64c 100644
--- a/packages/code-gen/src/processors/model-keys.js
+++ b/packages/code-gen/src/processors/model-keys.js
@@ -1,7 +1,9 @@
 import { AppError, isNil } from "@compas/stdlib";
 import { DateType, UuidType } from "../builders/index.js";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureModels } from "./models.js";
 import { referenceUtilsGetProperty } from "./reference-utils.js";
 
diff --git a/packages/code-gen/src/processors/model-name.js b/packages/code-gen/src/processors/model-name.js
index 613cab64be..b56da6720d 100644
--- a/packages/code-gen/src/processors/model-name.js
+++ b/packages/code-gen/src/processors/model-name.js
@@ -1,6 +1,8 @@
 import { AppError } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureModels } from "./models.js";
 
 /**
diff --git a/packages/code-gen/src/processors/model-relation.js b/packages/code-gen/src/processors/model-relation.js
index 2655bc2db6..05152a17ec 100644
--- a/packages/code-gen/src/processors/model-relation.js
+++ b/packages/code-gen/src/processors/model-relation.js
@@ -1,11 +1,11 @@
 import { AppError } from "@compas/stdlib";
 import { ReferenceType, RelationType } from "../builders/index.js";
-import { errorsThrowCombinedError } from "../errors.js";
+import { typesOptionalityIsOptional } from "../types/optionality.js";
 import {
+  errorsThrowCombinedError,
   stringFormatNameForError,
   stringFormatRelation,
-} from "../string-format.js";
-import { typesOptionalityIsOptional } from "../types/optionality.js";
+} from "../utils.js";
 import { modelKeyGetPrimary } from "./model-keys.js";
 import { structureModels } from "./models.js";
 import { structureNamedTypes, structureResolveReference } from "./structure.js";
diff --git a/packages/code-gen/src/processors/model-where.js b/packages/code-gen/src/processors/model-where.js
index 439a443d75..ecb39b3db4 100644
--- a/packages/code-gen/src/processors/model-where.js
+++ b/packages/code-gen/src/processors/model-where.js
@@ -7,8 +7,7 @@ import {
   ObjectType,
   ReferenceType,
 } from "../builders/index.js";
-import { stringFormatNameForError } from "../string-format.js";
-import { upperCaseFirst } from "../utils.js";
+import { stringFormatNameForError, upperCaseFirst } from "../utils.js";
 import { modelKeyGetSearchable } from "./model-keys.js";
 import {
   modelRelationGetInformation,
diff --git a/packages/code-gen/src/processors/object-expansion.js b/packages/code-gen/src/processors/object-expansion.js
index 18a36a7a33..c27d5674a3 100644
--- a/packages/code-gen/src/processors/object-expansion.js
+++ b/packages/code-gen/src/processors/object-expansion.js
@@ -1,6 +1,8 @@
 import { AppError } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureNamedTypes, structureResolveReference } from "./structure.js";
 import { typeDefinitionTraverse } from "./type-definition-traverse.js";
 
diff --git a/packages/code-gen/src/processors/route-invalidation.js b/packages/code-gen/src/processors/route-invalidation.js
index 08e2e0266e..f819cee15f 100644
--- a/packages/code-gen/src/processors/route-invalidation.js
+++ b/packages/code-gen/src/processors/route-invalidation.js
@@ -1,6 +1,8 @@
 import { AppError, isNil } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureRoutes } from "./routes.js";
 import { structureResolveReference } from "./structure.js";
 
diff --git a/packages/code-gen/src/processors/route-trie.js b/packages/code-gen/src/processors/route-trie.js
index 7f3ee403e5..00f150caf5 100644
--- a/packages/code-gen/src/processors/route-trie.js
+++ b/packages/code-gen/src/processors/route-trie.js
@@ -1,6 +1,8 @@
 import { AppError } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureRoutes } from "./routes.js";
 
 /**
diff --git a/packages/code-gen/src/processors/structure-name-checks.js b/packages/code-gen/src/processors/structure-name-checks.js
index 78d0e6b83e..db868209cb 100644
--- a/packages/code-gen/src/processors/structure-name-checks.js
+++ b/packages/code-gen/src/processors/structure-name-checks.js
@@ -1,6 +1,8 @@
 import { AppError } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { structureNamedTypes } from "./structure.js";
 import { typeDefinitionTraverse } from "./type-definition-traverse.js";
 
diff --git a/packages/code-gen/src/processors/structure.js b/packages/code-gen/src/processors/structure.js
index b6e04cbddf..2463abf048 100644
--- a/packages/code-gen/src/processors/structure.js
+++ b/packages/code-gen/src/processors/structure.js
@@ -1,7 +1,9 @@
 import { AppError, isNil } from "@compas/stdlib";
 import { isNamedTypeBuilderLike } from "../builders/index.js";
-import { errorsThrowCombinedError } from "../errors.js";
-import { stringFormatNameForError } from "../string-format.js";
+import {
+  errorsThrowCombinedError,
+  stringFormatNameForError,
+} from "../utils.js";
 import { typeDefinitionTraverse } from "./type-definition-traverse.js";
 
 /**
diff --git a/packages/code-gen/src/string-format.d.ts b/packages/code-gen/src/string-format.d.ts
deleted file mode 100644
index d880be7316..0000000000
--- a/packages/code-gen/src/string-format.d.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-/**
- * Format a type name for error messages
- *
- * @param {undefined|{ group?: string, name?: string, type?: string }} type
- * @returns {string}
- */
-export function stringFormatNameForError(
-  type:
-    | undefined
-    | {
-        group?: string;
-        name?: string;
-        type?: string;
-      },
-): string;
-/**
- * Format a full relation name
- *
- * @param {string} ownName
- * @param {string} inverseName
- * @param {string} ownKey
- * @param {string} inverseKey
- * @returns {string}
- */
-export function stringFormatRelation(
-  ownName: string,
-  inverseName: string,
-  ownKey: string,
-  inverseKey: string,
-): string;
-//# sourceMappingURL=string-format.d.ts.map
diff --git a/packages/code-gen/src/string-format.js b/packages/code-gen/src/string-format.js
deleted file mode 100644
index 39c67f9478..0000000000
--- a/packages/code-gen/src/string-format.js
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * Format a type name for error messages
- *
- * @param {undefined|{ group?: string, name?: string, type?: string }} type
- * @returns {string}
- */
-export function stringFormatNameForError(type) {
-  if (type?.group && type?.name) {
-    return `('${type.group}', '${type.name}')`;
-  }
-
-  if (type?.type) {
-    return `(${type.type})`;
-  }
-
-  return `(anonymous)`;
-}
-
-/**
- * Format a full relation name
- *
- * @param {string} ownName
- * @param {string} inverseName
- * @param {string} ownKey
- * @param {string} inverseKey
- * @returns {string}
- */
-export function stringFormatRelation(ownName, inverseName, ownKey, inverseKey) {
-  return `from '${ownName}' to '${inverseName}' via '${ownName}#${ownKey}' to '${inverseName}#${inverseKey}'`;
-}
diff --git a/packages/code-gen/src/string-format.test.js b/packages/code-gen/src/string-format.test.js
deleted file mode 100644
index eb27340b01..0000000000
--- a/packages/code-gen/src/string-format.test.js
+++ /dev/null
@@ -1,43 +0,0 @@
-import { mainTestFn, test } from "@compas/cli";
-import { stringFormatNameForError } from "./string-format.js";
-
-mainTestFn(import.meta);
-
-test("code-gen/string-format", (t) => {
-  t.test("stringFormatNameForError", (t) => {
-    t.test("format group and name", (t) => {
-      const result = stringFormatNameForError({
-        group: "foo",
-        name: "bar",
-      });
-
-      t.equal(result, "('foo', 'bar')");
-    });
-
-    t.test("format type property", (t) => {
-      const result = stringFormatNameForError({
-        type: "boolean",
-      });
-
-      t.equal(result, "(boolean)");
-    });
-
-    t.test("default to anonymous", (t) => {
-      const result = stringFormatNameForError({});
-
-      t.equal(result, "(anonymous)");
-    });
-
-    t.test("return default value if only group is provided", (t) => {
-      const result = stringFormatNameForError({ group: "foo" });
-
-      t.equal(result, "(anonymous)");
-    });
-
-    t.test("return default value if only name is provided", (t) => {
-      const result = stringFormatNameForError({ name: "foo" });
-
-      t.equal(result, "(anonymous)");
-    });
-  });
-});
diff --git a/packages/code-gen/src/utils.d.ts b/packages/code-gen/src/utils.d.ts
index 4f57890900..e2743d002b 100644
--- a/packages/code-gen/src/utils.d.ts
+++ b/packages/code-gen/src/utils.d.ts
@@ -12,4 +12,48 @@ export function upperCaseFirst(str?: string | undefined): string;
  * @returns {string}
  */
 export function lowerCaseFirst(str?: string | undefined): string;
+/**
+ * Format a type name for error messages
+ *
+ * @param {undefined|{ group?: string, name?: string, type?: string }} type
+ * @returns {string}
+ */
+export function stringFormatNameForError(
+  type:
+    | undefined
+    | {
+        group?: string;
+        name?: string;
+        type?: string;
+      },
+): string;
+/**
+ * Format a full relation name
+ *
+ * @param {string} ownName
+ * @param {string} inverseName
+ * @param {string} ownKey
+ * @param {string} inverseKey
+ * @returns {string}
+ */
+export function stringFormatRelation(
+  ownName: string,
+  inverseName: string,
+  ownKey: string,
+  inverseKey: string,
+): string;
+/**
+ * Combine the messages of the provided errors and throw a new error.
+ *
+ * Early returns if an empty array is provided.
+ *
+ * Other supported properties:
+ * - messages: expected to be a string[]
+ *
+ * @param {import("@compas/stdlib").AppError[]} errors
+ * @returns {void}
+ */
+export function errorsThrowCombinedError(
+  errors: import("@compas/stdlib").AppError[],
+): void;
 //# sourceMappingURL=utils.d.ts.map
diff --git a/packages/code-gen/src/utils.js b/packages/code-gen/src/utils.js
index b7f7bb0105..7e1a96867b 100644
--- a/packages/code-gen/src/utils.js
+++ b/packages/code-gen/src/utils.js
@@ -1,3 +1,5 @@
+import { AppError } from "@compas/stdlib";
+
 /**
  * Uppercase first character of the input string
  *
@@ -17,3 +19,67 @@ export function upperCaseFirst(str = "") {
 export function lowerCaseFirst(str = "") {
   return str.length > 0 ? str[0].toLowerCase() + str.substring(1) : "";
 }
+
+/**
+ * Format a type name for error messages
+ *
+ * @param {undefined|{ group?: string, name?: string, type?: string }} type
+ * @returns {string}
+ */
+export function stringFormatNameForError(type) {
+  if (type?.group && type?.name) {
+    return `('${type.group}', '${type.name}')`;
+  }
+
+  if (type?.type) {
+    return `(${type.type})`;
+  }
+
+  return `(anonymous)`;
+}
+
+/**
+ * Format a full relation name
+ *
+ * @param {string} ownName
+ * @param {string} inverseName
+ * @param {string} ownKey
+ * @param {string} inverseKey
+ * @returns {string}
+ */
+export function stringFormatRelation(ownName, inverseName, ownKey, inverseKey) {
+  return `from '${ownName}' to '${inverseName}' via '${ownName}#${ownKey}' to '${inverseName}#${inverseKey}'`;
+}
+
+/**
+ * Combine the messages of the provided errors and throw a new error.
+ *
+ * Early returns if an empty array is provided.
+ *
+ * Other supported properties:
+ * - messages: expected to be a string[]
+ *
+ * @param {import("@compas/stdlib").AppError[]} errors
+ * @returns {void}
+ */
+export function errorsThrowCombinedError(errors) {
+  if (errors.length === 0) {
+    return;
+  }
+
+  const messages = [];
+
+  for (const err of errors) {
+    if (err.info?.message) {
+      messages.push(err.info.message);
+    } else if (err.info?.messages) {
+      messages.push(...err.info.messages);
+    } else {
+      messages.push(AppError.format(err));
+    }
+  }
+
+  throw AppError.serverError({
+    messages,
+  });
+}
diff --git a/packages/code-gen/src/errors.test.js b/packages/code-gen/src/utils.test.js
similarity index 59%
rename from packages/code-gen/src/errors.test.js
rename to packages/code-gen/src/utils.test.js
index cd6f661944..276220c284 100644
--- a/packages/code-gen/src/errors.test.js
+++ b/packages/code-gen/src/utils.test.js
@@ -1,10 +1,47 @@
 import { mainTestFn, test } from "@compas/cli";
 import { AppError } from "@compas/stdlib";
-import { errorsThrowCombinedError } from "./errors.js";
+import { errorsThrowCombinedError, stringFormatNameForError } from "./utils.js";
 
 mainTestFn(import.meta);
 
-test("code-gen/errors", (t) => {
+test("code-gen/utils", (t) => {
+  t.test("stringFormatNameForError", (t) => {
+    t.test("format group and name", (t) => {
+      const result = stringFormatNameForError({
+        group: "foo",
+        name: "bar",
+      });
+
+      t.equal(result, "('foo', 'bar')");
+    });
+
+    t.test("format type property", (t) => {
+      const result = stringFormatNameForError({
+        type: "boolean",
+      });
+
+      t.equal(result, "(boolean)");
+    });
+
+    t.test("default to anonymous", (t) => {
+      const result = stringFormatNameForError({});
+
+      t.equal(result, "(anonymous)");
+    });
+
+    t.test("return default value if only group is provided", (t) => {
+      const result = stringFormatNameForError({ group: "foo" });
+
+      t.equal(result, "(anonymous)");
+    });
+
+    t.test("return default value if only name is provided", (t) => {
+      const result = stringFormatNameForError({ name: "foo" });
+
+      t.equal(result, "(anonymous)");
+    });
+  });
+
   t.test("errorsThrowCombinedError", (t) => {
     t.test("returns with empty error array", (t) => {
       errorsThrowCombinedError([]);
diff --git a/packages/code-gen/src/validators/generator.js b/packages/code-gen/src/validators/generator.js
index 832151c9e3..ce799acc3c 100644
--- a/packages/code-gen/src/validators/generator.js
+++ b/packages/code-gen/src/validators/generator.js
@@ -4,11 +4,11 @@ import {
   structureNamedTypes,
   structureResolveReference,
 } from "../processors/structure.js";
-import { stringFormatNameForError } from "../string-format.js";
 import { targetLanguageSwitch } from "../target/switcher.js";
 import { typesCacheGet } from "../types/cache.js";
 import { typesGeneratorGenerateNamedType } from "../types/generator.js";
 import { typesOptionalityIsOptional } from "../types/optionality.js";
+import { stringFormatNameForError } from "../utils.js";
 import {
   validatorJavascriptAny,
   validatorJavascriptAnyOf,