diff --git a/packages/cli/src/generated/common/types.d.ts b/packages/cli/src/generated/common/types.d.ts
index d30f54f517..209c9698b1 100644
--- a/packages/cli/src/generated/common/types.d.ts
+++ b/packages/cli/src/generated/common/types.d.ts
@@ -95,3 +95,5 @@ export type CliCompletion =
     "specification": "boolean"|"number"|"string"|"booleanOrString";
     "description"?: string|undefined;
   };
+
+
diff --git a/packages/code-gen/package.json b/packages/code-gen/package.json
index 91708aae42..0dbe9a5d5c 100644
--- a/packages/code-gen/package.json
+++ b/packages/code-gen/package.json
@@ -10,13 +10,7 @@
     "./package.json": "./package.json"
   },
   "type": "module",
-  "keywords": [
-    "compas",
-    "generate",
-    "router",
-    "validation",
-    "code-gen"
-  ],
+  "keywords": ["compas", "generate", "router", "validation", "code-gen"],
   "license": "MIT",
   "dependencies": {
     "@compas/stdlib": "0.15.4"
diff --git a/packages/code-gen/src/api-client/ts-axios.js b/packages/code-gen/src/api-client/ts-axios.js
index fddb0e8200..328e91563f 100644
--- a/packages/code-gen/src/api-client/ts-axios.js
+++ b/packages/code-gen/src/api-client/ts-axios.js
@@ -29,6 +29,10 @@ export function tsAxiosGenerateCommonFile(generateContext) {
     {
       importCollector: new JavascriptImportCollector(),
       typeImportCollector: new JavascriptImportCollector(true),
+      contents:
+        generateContext.options.generators.router ?
+          `// @ts-nocheck\n\n`
+        : undefined,
     },
   );
 
@@ -73,6 +77,61 @@ export function tsAxiosGenerateCommonFile(generateContext) {
 }>;
 `,
   );
+
+  if (generateContext.options.generators.router) {
+    importCollector.destructure("@compas/stdlib", "AppError");
+    importCollector.destructure("@compas/stdlib", "streamToBuffer");
+
+    fileWrite(
+      file,
+      `/**
+ * Adds an interceptor to the provided Axios instance, wrapping any error in an AppError.
+ * This allows directly testing against an error key or property.
+ */
+export function axiosInterceptErrorAndWrapWithAppError(axiosInstance: AxiosInstance) {
+  axiosInstance.interceptors.response.use(undefined, async (error) => {
+    // Validator error
+    if (AppError.instanceOf(error)) {
+      // If it is an AppError already, it most likely is thrown by the response
+      // validators. So we rethrow it as is.
+      throw error;
+    }
+
+    if (typeof error?.response?.data?.pipe === "function") {
+      const buffer = await streamToBuffer(error.response.data);
+      try {
+        error.response.data = JSON.parse(buffer.toString("utf-8"));
+      } catch {
+        // Unknown error
+        throw new AppError(
+          \`response.error\`,
+          error.response?.status ?? 500,
+          {
+            message:
+              "Could not decode the response body for further information.",
+          },
+          error,
+        );
+      }
+    }
+
+    // Server AppError
+    const { key, info } = error.response?.data ?? {};
+    if (typeof key === "string" && !!info && typeof info === "object") {
+      throw new AppError(key, error.response.status, info, error);
+    }
+
+    // Unknown error
+    throw new AppError(
+      \`response.error\`,
+      error.response?.status ?? 500,
+      AppError.format(error),
+    );
+  });
+}
+`,
+    );
+  }
 }
 
 /**
diff --git a/packages/code-gen/src/crud/events.js b/packages/code-gen/src/crud/events.js
index 46abc8631b..bb78c46531 100644
--- a/packages/code-gen/src/crud/events.js
+++ b/packages/code-gen/src/crud/events.js
@@ -30,10 +30,6 @@ import {
  * @param {import("../generate.js").GenerateContext} generateContext
  */
 export function crudEventsGenerate(generateContext) {
-  if (generateContext.options.targetLanguage !== "js") {
-    return;
-  }
-
   if (isNil(generateContext.options.generators.router?.target?.library)) {
     return;
   }
@@ -96,9 +92,14 @@ function crudEventsGenerateForType(generateContext, file, crud) {
  * @param {import("../../types/advanced-types.d.ts").NamedType<import("../generated/common/types.d.ts").StructureCrudDefinition>} crud
  */
 function crudEventsFile(generateContext, crud) {
-  return fileContextCreateGeneric(generateContext, `${crud.group}/events.js`, {
-    importCollector: new JavascriptImportCollector(),
-  });
+  return fileContextCreateGeneric(
+    generateContext,
+    `${crud.group}/events.${generateContext.options.targetLanguage}`,
+    {
+      importCollector: new JavascriptImportCollector(),
+      contents: "// @ts-nocheck\n\n",
+    },
+  );
 }
 
 /**
diff --git a/packages/code-gen/src/crud/handlers.js b/packages/code-gen/src/crud/handlers.js
index 9c0525e028..38fd4b2bfe 100644
--- a/packages/code-gen/src/crud/handlers.js
+++ b/packages/code-gen/src/crud/handlers.js
@@ -36,10 +36,6 @@ import { crudQueryBuilderGet } from "./query-builder.js";
  * @param {import("../generate.js").GenerateContext} generateContext
  */
 export function crudHandlersGenerate(generateContext) {
-  if (generateContext.options.targetLanguage !== "js") {
-    return;
-  }
-
   if (isNil(generateContext.options.generators.router?.target?.library)) {
     return;
   }
@@ -60,9 +56,14 @@ export function crudHandlersGenerate(generateContext) {
  * @param {import("../../types/advanced-types.d.ts").NamedType<import("../generated/common/types.d.ts").StructureCrudDefinition>} crud
  */
 function crudHandlersFile(generateContext, crud) {
-  return fileContextCreateGeneric(generateContext, `${crud.group}/crud.js`, {
-    importCollector: new JavascriptImportCollector(),
-  });
+  return fileContextCreateGeneric(
+    generateContext,
+    `${crud.group}/crud.${generateContext.options.targetLanguage}`,
+    {
+      importCollector: new JavascriptImportCollector(),
+      contents: "// @ts-nocheck\n\n",
+    },
+  );
 }
 
 /**
diff --git a/packages/code-gen/src/database/ts-postgres.js b/packages/code-gen/src/database/ts-postgres.js
index b1bc10c345..d347016187 100644
--- a/packages/code-gen/src/database/ts-postgres.js
+++ b/packages/code-gen/src/database/ts-postgres.js
@@ -38,7 +38,7 @@ export function tsPostgresGenerateUtils(generateContext) {
 
   const indexFile = fileContextCreateGeneric(
     generateContext,
-    "common/database.js",
+    "common/database.ts",
     {
       importCollector: new JavascriptImportCollector(),
       typeImportCollector: new JavascriptImportCollector(true),
diff --git a/packages/code-gen/src/generated/common/types.d.ts b/packages/code-gen/src/generated/common/types.d.ts
index 52c8f7d8a1..0717431f47 100644
--- a/packages/code-gen/src/generated/common/types.d.ts
+++ b/packages/code-gen/src/generated/common/types.d.ts
@@ -1389,3 +1389,5 @@ export type StructureTypeDefinitionInput =
   |StructureReferenceDefinitionInput
   |StructureRelationDefinitionInput
   |StructureRouteInvalidationDefinitionInput;
+
+
diff --git a/packages/create-compas/package.json b/packages/create-compas/package.json
index ffaf41ee58..e17a84cc2a 100644
--- a/packages/create-compas/package.json
+++ b/packages/create-compas/package.json
@@ -9,10 +9,7 @@
   "bin": {
     "create-compas": "src/create-compas.js"
   },
-  "keywords": [
-    "compas",
-    "create"
-  ],
+  "keywords": ["compas", "create"],
   "license": "MIT",
   "dependencies": {
     "@compas/stdlib": "0.15.4",
diff --git a/packages/server/package.json b/packages/server/package.json
index a5e08bca9d..a166dd4913 100644
--- a/packages/server/package.json
+++ b/packages/server/package.json
@@ -10,13 +10,7 @@
     "./package.json": "./package.json"
   },
   "type": "module",
-  "keywords": [
-    "compas",
-    "koa",
-    "api",
-    "http",
-    "backend"
-  ],
+  "keywords": ["compas", "koa", "api", "http", "backend"],
   "license": "MIT",
   "dependencies": {
     "@compas/stdlib": "0.15.4",
diff --git a/packages/stdlib/package.json b/packages/stdlib/package.json
index f46d526884..4dcfd42ccb 100644
--- a/packages/stdlib/package.json
+++ b/packages/stdlib/package.json
@@ -10,12 +10,7 @@
     "./package.json": "./package.json"
   },
   "type": "module",
-  "keywords": [
-    "compas",
-    "stdlib",
-    "standard",
-    "logger"
-  ],
+  "keywords": ["compas", "stdlib", "standard", "logger"],
   "license": "MIT",
   "dependencies": {
     "@types/node": "22.9.0",
diff --git a/packages/store/package.json b/packages/store/package.json
index d774580428..b69e3f7ab1 100644
--- a/packages/store/package.json
+++ b/packages/store/package.json
@@ -10,12 +10,7 @@
     "./package.json": "./package.json"
   },
   "type": "module",
-  "keywords": [
-    "compas",
-    "s3",
-    "postgres",
-    "persistence"
-  ],
+  "keywords": ["compas", "s3", "postgres", "persistence"],
   "license": "MIT",
   "dependencies": {
     "@aws-sdk/client-s3": "3.689.0",
diff --git a/packages/store/src/generated/common/types.d.ts b/packages/store/src/generated/common/types.d.ts
index 94ba9b3a3b..2e4b538ea7 100644
--- a/packages/store/src/generated/common/types.d.ts
+++ b/packages/store/src/generated/common/types.d.ts
@@ -2505,3 +2505,5 @@ export type QueryExpansionStoreSessionStoreToken = {
   "session": QueryDefinitionStoreSessionStore;
   "accessToken"?: QueryDefinitionStoreSessionStoreToken|undefined;
 };
+
+