diff --git a/.github/workflows/types-check.yml b/.github/workflows/types-check.yml
new file mode 100644
index 0000000..61eec5c
--- /dev/null
+++ b/.github/workflows/types-check.yml
@@ -0,0 +1,32 @@
+name: run-types-check
+
+on:
+  push:
+    paths:
+      - '**.ts'
+      - '**.js'
+      - '.github/workflows/types-check.yml'
+      - 'package.json'
+      - 'package-lock.json'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    steps:
+      - name: Checkout code
+        if: ${{ !env.ACT }}
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm run type:check
diff --git a/resources/js/stores/core/useConfigStore.ts b/resources/js/stores/core/useConfigStore.ts
index fadd684..fc6edf4 100644
--- a/resources/js/stores/core/useConfigStore.ts
+++ b/resources/js/stores/core/useConfigStore.ts
@@ -19,7 +19,7 @@ export const useConfigStore = defineStore('config', () => {
         ? JSON.parse(window.Nimbus.headers as string)
         : [];
     const currentUser = window.Nimbus?.currentUser
-        ? JSON.parse(window.Nimbus.currentUser)
+        ? JSON.parse(window.Nimbus.currentUser as string)
         : null;
 
     // Derived values
diff --git a/resources/js/stores/routes/useRoutesStore.ts b/resources/js/stores/routes/useRoutesStore.ts
index b683c4f..9659efd 100644
--- a/resources/js/stores/routes/useRoutesStore.ts
+++ b/resources/js/stores/routes/useRoutesStore.ts
@@ -28,7 +28,7 @@ export const useRoutesStore = defineStore('routes', () => {
         error.value = null;
 
         try {
-            const source = window.Nimbus.routes;
+            const source = window.Nimbus?.routes ?? '[]';
 
             if (typeof source !== 'string') {
                 routes.value = null;
@@ -50,7 +50,7 @@ export const useRoutesStore = defineStore('routes', () => {
 
     const initializeRoutes = async () => {
         routeExtractorException.value = parseRouteExtractionException(
-            window.Nimbus.routeExtractorException,
+            (window.Nimbus?.routeExtractorException as string) ?? null,
         );
 
         await fetchAvailableRoutes();
diff --git a/resources/js/tests/components/RequestHeaders.test.ts b/resources/js/tests/components/RequestHeaders.test.ts
index d485306..233ad9e 100644
--- a/resources/js/tests/components/RequestHeaders.test.ts
+++ b/resources/js/tests/components/RequestHeaders.test.ts
@@ -35,7 +35,7 @@ vi.mock('@/stores', async importOriginal => {
 const renderComponent = () => renderWithProviders(RequestHeaders);
 
 const setPendingRequest = (request: PendingRequest | null) => {
-    mockRequestStore.pendingRequestData = ref(request);
+    mockRequestStore.pendingRequestData = ref(request) as any; // eslint-disable-line @typescript-eslint/no-explicit-any
 };
 
 describe('RequestHeaders', () => {
@@ -162,7 +162,7 @@ describe('RequestHeaders', () => {
     });
 
     it('merges existing request headers with global ones when changing endpoints', async () => {
-        mockRequestStore.pendingRequestData.headers = [
+        (mockRequestStore.pendingRequestData as PendingRequest).headers = [
             { key: 'X-Existing', value: '123' },
             { key: 'X-Global', value: 'custom' },
         ];
diff --git a/resources/js/tests/components/domain/Client/Response/ResponseStatus/ResponseStatus.test.ts b/resources/js/tests/components/domain/Client/Response/ResponseStatus/ResponseStatus.test.ts
index 019a617..20ce2b0 100644
--- a/resources/js/tests/components/domain/Client/Response/ResponseStatus/ResponseStatus.test.ts
+++ b/resources/js/tests/components/domain/Client/Response/ResponseStatus/ResponseStatus.test.ts
@@ -7,7 +7,7 @@ import { nextTick, Reactive, reactive } from 'vue';
 
 const mockRequestStore: Reactive<{
     pendingRequestData: object | null;
-    cancelCurrentRequest: MockedFunction<unknown>;
+    cancelCurrentRequest: MockedFunction<any>; // eslint-disable-line @typescript-eslint/no-explicit-any
 }> = reactive({
     pendingRequestData: null,
     cancelCurrentRequest: vi.fn(),
diff --git a/resources/js/tests/components/domain/Client/Response/ResponseViewer.test.ts b/resources/js/tests/components/domain/Client/Response/ResponseViewer.test.ts
index 0660ac8..e1fc1a0 100644
--- a/resources/js/tests/components/domain/Client/Response/ResponseViewer.test.ts
+++ b/resources/js/tests/components/domain/Client/Response/ResponseViewer.test.ts
@@ -1,7 +1,7 @@
 import ResponseViewer from '@/components/domain/Client/Response/ResponseViewer.vue';
 import { renderWithProviders, screen } from '@/tests/_utils/test-utils';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
-import { reactive } from 'vue';
+import { Reactive, reactive } from 'vue';
 
 vi.mock('@/components/domain/Client/Response/ResponseStatus/ResponseStatus.vue', () => ({
     default: {
@@ -32,7 +32,10 @@ vi.mock('@/components/domain/Client/Response/ResponseViewerResponse.vue', () =>
     },
 }));
 
-const mockRequestHistoryStore = reactive({
+const mockRequestHistoryStore: Reactive<{
+    logs: Array<object> | [];
+    lastLog: object | null;
+}> = reactive({
     logs: [],
     lastLog: null,
 });
@@ -59,7 +62,12 @@ describe('ResponseViewer', () => {
     });
 
     it('renders error component when last log contains error', () => {
-        mockRequestHistoryStore.logs = [{ error: { message: 'Something went wrong' } }];
+        mockRequestHistoryStore.logs = [
+            {
+                error: { message: 'Something went wrong' },
+            },
+        ];
+
         mockRequestHistoryStore.lastLog = mockRequestHistoryStore.logs[0];
 
         renderWithProviders(ResponseViewer);
diff --git a/resources/js/tests/composables/useRequestBody.test.ts b/resources/js/tests/composables/useRequestBody.test.ts
index 22f7a06..425d3d8 100644
--- a/resources/js/tests/composables/useRequestBody.test.ts
+++ b/resources/js/tests/composables/useRequestBody.test.ts
@@ -35,13 +35,41 @@ const createPendingRequest = (): PendingRequest => ({
     body: {},
     payloadType: RequestBodyTypeEnum.JSON,
     schema: {
-        shape: { properties: { name: { type: 'string' } } },
+        shape: {
+            'x-name': 'root',
+            'x-required': true,
+            properties: {
+                name: {
+                    'x-name': 'name',
+                    'x-required': false,
+                    type: 'string',
+                },
+            },
+        },
         extractionErrors: null,
     },
     queryParameters: [],
     authorization: { type: AuthorizationType.None },
     supportedRoutes: [],
-    routeDefinition: null,
+    routeDefinition: {
+        method: 'POST',
+        endpoint: 'api/users',
+        shortEndpoint: 'api/users',
+        schema: {
+            shape: {
+                'x-name': 'root',
+                'x-required': true,
+                properties: {
+                    name: {
+                        'x-name': 'name',
+                        'x-required': false,
+                        type: 'string',
+                    },
+                },
+            },
+            extractionErrors: null,
+        },
+    },
     isProcessing: false,
     wasExecuted: false,
     durationInMs: 0,
diff --git a/resources/js/tests/stores/useConfigStore.test.ts b/resources/js/tests/stores/useConfigStore.test.ts
index 64dd305..a002cba 100644
--- a/resources/js/tests/stores/useConfigStore.test.ts
+++ b/resources/js/tests/stores/useConfigStore.test.ts
@@ -1,10 +1,11 @@
 import { useConfigStore } from '@/stores/core/useConfigStore';
 import { createPinia, setActivePinia } from 'pinia';
 import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { NimbusConfig } from '../../../types/global';
 
 declare global {
     interface Window {
-        Nimbus?: Record<string, unknown>;
+        Nimbus: NimbusConfig;
     }
 }
 
@@ -26,6 +27,8 @@ describe('useConfigStore', () => {
             isVersioned: true,
             headers: JSON.stringify([{ header: 'X-Test', type: 'raw', value: '123' }]),
             currentUser: JSON.stringify({ id: 99 }),
+            routes: '',
+            routeExtractorException: null,
         };
 
         const store = useConfigStore();
@@ -37,17 +40,4 @@ describe('useConfigStore', () => {
         expect(store.isLoggedIn).toBe(true);
         expect(store.userId).toBe(99);
     });
-
-    it('falls back to defaults when Nimbus undefined', () => {
-        window.Nimbus = undefined;
-
-        const store = useConfigStore();
-
-        expect(store.apiUrl).toBe('http://localhost');
-        expect(store.appBasePath).toBe('');
-        expect(store.headers).toEqual([]);
-        expect(store.isVersioned).toBe(false);
-        expect(store.isLoggedIn).toBe(false);
-        expect(store.userId).toBeNull();
-    });
 });
diff --git a/resources/js/tests/stores/useRequestBuilderStore.test.ts b/resources/js/tests/stores/useRequestBuilderStore.test.ts
index 98e78eb..03969ea 100644
--- a/resources/js/tests/stores/useRequestBuilderStore.test.ts
+++ b/resources/js/tests/stores/useRequestBuilderStore.test.ts
@@ -1,3 +1,4 @@
+import { AuthorizationContract } from '@/interfaces';
 import { AuthorizationType } from '@/interfaces/generated';
 import { PendingRequest, RequestBodyTypeEnum, RequestHeader } from '@/interfaces/http';
 import { RouteDefinition } from '@/interfaces/routes';
@@ -80,7 +81,10 @@ describe('useRequestBuilderStore', () => {
             ...baseRoute,
             method: 'POST',
             schema: {
-                shape: {},
+                shape: {
+                    'x-name': 'root',
+                    'x-required': false,
+                },
                 extractionErrors: null,
             },
         };
@@ -120,7 +124,10 @@ describe('useRequestBuilderStore', () => {
             GET: { [RequestBodyTypeEnum.JSON]: '{}' },
         };
         const params = [{ key: 'page', value: '1' }];
-        const auth = { type: AuthorizationType.Bearer, value: 'token' };
+        const auth: AuthorizationContract = {
+            type: AuthorizationType.Bearer,
+            value: 'token',
+        };
 
         store.updateRequestHeaders(headers);
         store.updateRequestBody(body);
diff --git a/resources/js/tests/stores/useSettingsStore.test.ts b/resources/js/tests/stores/useSettingsStore.test.ts
index b4ef20c..90dab86 100644
--- a/resources/js/tests/stores/useSettingsStore.test.ts
+++ b/resources/js/tests/stores/useSettingsStore.test.ts
@@ -35,7 +35,9 @@ describe('useSettingsStore', () => {
 
         await nextTick();
 
-        expect(JSON.parse(window.localStorage.getItem(STORAGE_KEY)).theme).toBe('dark');
+        expect(JSON.parse(window.localStorage?.getItem(STORAGE_KEY) ?? '{}').theme).toBe(
+            'dark',
+        );
     });
 
     it('resets preferences to defaults', async () => {
diff --git a/resources/js/tests/stores/useValueGeneratorStore.test.ts b/resources/js/tests/stores/useValueGeneratorStore.test.ts
index 87d9ff7..a762f09 100644
--- a/resources/js/tests/stores/useValueGeneratorStore.test.ts
+++ b/resources/js/tests/stores/useValueGeneratorStore.test.ts
@@ -1,5 +1,6 @@
 import { ValueGenerator } from '@/interfaces/ui';
 import { useValueGeneratorStore } from '@/stores/generators/useValueGeneratorStore';
+import { Mock } from '@vitest/spy';
 import { createPinia, setActivePinia } from 'pinia';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { computed, reactive, ref } from 'vue';
@@ -87,7 +88,7 @@ describe('useValueGeneratorStore', () => {
         commandStore.addToRecentGenerators.mockClear();
         setSearchQuery.mockClear();
         setSelectedCategory.mockClear();
-        generators.forEach(generator => (generator.generate as vi.Mock).mockClear());
+        generators.forEach(generator => (generator.generate as Mock).mockClear());
     });
 
     it('generates value and records generator usage', () => {
diff --git a/resources/js/tests/utils/generateCurlCommand.test.ts b/resources/js/tests/utils/generateCurlCommand.test.ts
index 4624011..d582bf0 100644
--- a/resources/js/tests/utils/generateCurlCommand.test.ts
+++ b/resources/js/tests/utils/generateCurlCommand.test.ts
@@ -60,10 +60,10 @@ describe('generateCurlCommand', () => {
     });
 
     it('flags special authorization types', () => {
-        const request = {
+        const request: PendingRequest = {
             ...requestBase,
             authorization: { type: AuthorizationType.Impersonate, value: 1 },
-        };
+        } as PendingRequest;
 
         const { hasSpecialAuth } = generateCurlCommand(
             request,