diff --git a/.eslintignore b/.eslintignore
deleted file mode 100644
index f3af2557..00000000
--- a/.eslintignore
+++ /dev/null
@@ -1,8 +0,0 @@
-node_modules
-dist
-coverage 
-*.log 
-**/*.js 
-sdks/typescript/client/src/remote-dom/iframe-bundle.ts
-
-examples
\ No newline at end of file
diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index 9a4ebbef..00000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-  "root": true,
-  "parser": "@typescript-eslint/parser",
-  "plugins": ["@typescript-eslint", "react"],
-  "extends": [
-    "eslint:recommended",
-    "plugin:@typescript-eslint/recommended",
-    "plugin:react/recommended",
-    "plugin:react/jsx-runtime",
-    "prettier"
-  ],
-  "settings": {
-    "react": {
-      "version": "detect"
-    }
-  },
-  "env": {
-    "node": true,
-    "browser": true,
-    "es2021": true,
-    "jest": true
-  },
-  "parserOptions": {
-    "ecmaVersion": "latest",
-    "sourceType": "module",
-    "ecmaFeatures": {
-      "jsx": true
-    }
-  },
-  "rules": {
-    "react/prop-types": "off"
-  }
-}
diff --git a/docs/src/.vitepress/config.ts b/docs/src/.vitepress/config.ts
index eabee191..d653dddf 100644
--- a/docs/src/.vitepress/config.ts
+++ b/docs/src/.vitepress/config.ts
@@ -319,7 +319,7 @@ export default withMermaid(
         dark: 'github-dark',
       },
       lineNumbers: true,
-      config: (md) => {
+      config: (_md) => {
         // Add any markdown-it plugins here
       },
     },
diff --git a/docs/src/.vitepress/theme/index.ts b/docs/src/.vitepress/theme/index.ts
index 09015433..cd90e6c3 100644
--- a/docs/src/.vitepress/theme/index.ts
+++ b/docs/src/.vitepress/theme/index.ts
@@ -15,7 +15,7 @@ export default {
       ])
     })
   },
-  enhanceApp({ app, router, siteData }) {
+  enhanceApp({ app: _app, router: _router, siteData: _siteData }) {
     // Custom app enhancements can go here
   },
 } satisfies Theme;
diff --git a/eslint.config.js b/eslint.config.js
new file mode 100644
index 00000000..b3f9d0b8
--- /dev/null
+++ b/eslint.config.js
@@ -0,0 +1,191 @@
+const tseslint = require('@typescript-eslint/eslint-plugin');
+const tsparser = require('@typescript-eslint/parser');
+const react = require('eslint-plugin-react');
+const prettierConfig = require('eslint-config-prettier');
+
+module.exports = [
+  // Global ignores
+  {
+    ignores: [
+      '**/node_modules/**',
+      '**/dist/**',
+      '**/coverage/**',
+      '**/*.log',
+      '**/*.js',
+      'sdks/typescript/client/src/remote-dom/iframe-bundle.ts',
+      'examples/**',
+    ],
+  },
+
+  // Base configuration for all files
+  {
+    files: ['**/*.ts', '**/*.tsx'],
+    languageOptions: {
+      parser: tsparser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+      globals: {
+        // Node globals
+        console: 'readonly',
+        process: 'readonly',
+        Buffer: 'readonly',
+        __dirname: 'readonly',
+        __filename: 'readonly',
+        module: 'readonly',
+        require: 'readonly',
+        exports: 'readonly',
+        global: 'readonly',
+        setTimeout: 'readonly',
+        clearTimeout: 'readonly',
+        setInterval: 'readonly',
+        clearInterval: 'readonly',
+        setImmediate: 'readonly',
+        clearImmediate: 'readonly',
+        // Browser globals
+        window: 'readonly',
+        Window: 'readonly',
+        document: 'readonly',
+        navigator: 'readonly',
+        localStorage: 'readonly',
+        sessionStorage: 'readonly',
+        fetch: 'readonly',
+        btoa: 'readonly',
+        atob: 'readonly',
+        URL: 'readonly',
+        URLSearchParams: 'readonly',
+        customElements: 'readonly',
+        // DOM types
+        HTMLElement: 'readonly',
+        HTMLDivElement: 'readonly',
+        HTMLSpanElement: 'readonly',
+        HTMLButtonElement: 'readonly',
+        HTMLImageElement: 'readonly',
+        HTMLIFrameElement: 'readonly',
+        Element: 'readonly',
+        Node: 'readonly',
+        Event: 'readonly',
+        MessageEvent: 'readonly',
+        CustomEvent: 'readonly',
+        // Web APIs
+        TextEncoder: 'readonly',
+        TextDecoder: 'readonly',
+        Console: 'readonly',
+        Transferable: 'readonly',
+        WindowPostMessageOptions: 'readonly',
+        // ES2021 globals
+        Promise: 'readonly',
+        Symbol: 'readonly',
+        WeakMap: 'readonly',
+        WeakSet: 'readonly',
+        Proxy: 'readonly',
+        Reflect: 'readonly',
+        // Jest/Vitest globals
+        describe: 'readonly',
+        it: 'readonly',
+        test: 'readonly',
+        expect: 'readonly',
+        beforeEach: 'readonly',
+        afterEach: 'readonly',
+        beforeAll: 'readonly',
+        afterAll: 'readonly',
+        jest: 'readonly',
+        vi: 'readonly',
+      },
+    },
+    plugins: {
+      '@typescript-eslint': tseslint,
+      react: react,
+    },
+    rules: {
+      // ESLint recommended rules (manually specified to avoid needing @eslint/js)
+      'constructor-super': 'error',
+      'for-direction': 'error',
+      'getter-return': 'error',
+      'no-async-promise-executor': 'error',
+      'no-case-declarations': 'error',
+      'no-class-assign': 'error',
+      'no-compare-neg-zero': 'error',
+      'no-cond-assign': 'error',
+      'no-const-assign': 'error',
+      'no-constant-condition': 'error',
+      'no-control-regex': 'error',
+      'no-debugger': 'error',
+      'no-delete-var': 'error',
+      'no-dupe-args': 'error',
+      'no-dupe-class-members': 'error',
+      'no-dupe-else-if': 'error',
+      'no-dupe-keys': 'error',
+      'no-duplicate-case': 'error',
+      'no-empty': 'error',
+      'no-empty-character-class': 'error',
+      'no-empty-pattern': 'error',
+      'no-ex-assign': 'error',
+      'no-extra-boolean-cast': 'error',
+      'no-fallthrough': 'error',
+      'no-func-assign': 'error',
+      'no-global-assign': 'error',
+      'no-import-assign': 'error',
+      'no-inner-declarations': 'error',
+      'no-invalid-regexp': 'error',
+      'no-irregular-whitespace': 'error',
+      'no-loss-of-precision': 'error',
+      'no-misleading-character-class': 'error',
+      'no-mixed-spaces-and-tabs': 'error',
+      'no-new-symbol': 'error',
+      'no-nonoctal-decimal-escape': 'error',
+      'no-obj-calls': 'error',
+      'no-octal': 'error',
+      'no-prototype-builtins': 'error',
+      'no-redeclare': 'error',
+      'no-regex-spaces': 'error',
+      'no-self-assign': 'error',
+      'no-setter-return': 'error',
+      'no-shadow-restricted-names': 'error',
+      'no-sparse-arrays': 'error',
+      'no-this-before-super': 'error',
+      'no-undef': 'error',
+      'no-unexpected-multiline': 'error',
+      'no-unreachable': 'error',
+      'no-unsafe-finally': 'error',
+      'no-unsafe-negation': 'error',
+      'no-unsafe-optional-chaining': 'error',
+      'no-unused-labels': 'error',
+      'no-unused-vars': 'error',
+      'no-useless-backreference': 'error',
+      'no-useless-catch': 'error',
+      'no-useless-escape': 'error',
+      'no-with': 'error',
+      'require-yield': 'error',
+      'use-isnan': 'error',
+      'valid-typeof': 'error',
+
+      // TypeScript ESLint recommended rules
+      ...tseslint.configs.recommended.rules,
+
+      // React recommended rules
+      ...react.configs.recommended.rules,
+      ...react.configs['jsx-runtime'].rules,
+
+      // Custom overrides
+      'react/prop-types': 'off',
+      '@typescript-eslint/no-unused-vars': ['error', { 
+        argsIgnorePattern: '^_',
+        varsIgnorePattern: '^_',
+        caughtErrorsIgnorePattern: '^_'
+      }],
+    },
+    settings: {
+      react: {
+        version: 'detect',
+      },
+    },
+  },
+
+  // Prettier config (should be last to override other formatting rules)
+  prettierConfig,
+];
diff --git a/package.json b/package.json
index 9c280320..c60276ba 100644
--- a/package.json
+++ b/package.json
@@ -11,8 +11,8 @@
     "test:ruby": "cd sdks/ruby && bundle install && bundle exec rake spec",
     "test:watch": "vitest watch",
     "coverage": "vitest run --coverage",
-    "lint": "eslint . --ext .ts,.tsx,.js,.jsx",
-    "lint:fix": "eslint . --ext .ts,.tsx,.js,.jsx --fix",
+    "lint": "eslint .",
+    "lint:fix": "eslint . --fix",
     "format": "prettier --write \"**/*.{ts,tsx,js,jsx,json,md}\"",
     "version:patch": "echo \"Versioning with Changesets, then run pnpm install\" && pnpm changeset version && pnpm install --lockfile-only",
     "publish-packages": "pnpm build && pnpm changeset publish",
diff --git a/sdks/typescript/server/src/adapters/mcp-apps/adapter-runtime.ts b/sdks/typescript/server/src/adapters/mcp-apps/adapter-runtime.ts
index 7b1614a7..69648fa1 100644
--- a/sdks/typescript/server/src/adapters/mcp-apps/adapter-runtime.ts
+++ b/sdks/typescript/server/src/adapters/mcp-apps/adapter-runtime.ts
@@ -45,7 +45,6 @@ const LATEST_PROTOCOL_VERSION = '2025-11-21';
  * 
  * @see https://github.com/modelcontextprotocol/ext-apps/blob/main/src/spec.types.ts
  */
-// eslint-disable-next-line @typescript-eslint/no-unused-vars -- Used in switch cases below
 const METHODS = {
   // Lifecycle
   INITIALIZE: 'ui/initialize',
@@ -234,7 +233,7 @@ class McpAppsAdapter {
 
     try {
       await initPromise;
-    } catch (error) {
+    } catch (_error) {
       // Initialization failed, but we still try to work
       this.config.logger.warn('[MCP Apps Adapter] Continuing despite initialization error');
     }
@@ -533,7 +532,7 @@ class McpAppsAdapter {
 
                 this.sendJsonRpcRequest(jsonRpcId, METHODS.MESSAGE, {
                     role: 'user',
-                    content: { type: 'text', text: prompt }
+                    content: [{ type: 'text', text: prompt }]
                 });
                 break;
             }
@@ -576,7 +575,7 @@ class McpAppsAdapter {
                 // Translate intent to a message
                 this.sendJsonRpcRequest(jsonRpcId, METHODS.MESSAGE, {
                     role: 'user',
-                    content: { type: 'text', text: `Intent: ${intent}. Parameters: ${JSON.stringify(params)}` }
+                    content: [{ type: 'text', text: `Intent: ${intent}. Parameters: ${JSON.stringify(params)}` }],
                 });
                 break;
             }
diff --git a/sdks/typescript/server/src/utils.ts b/sdks/typescript/server/src/utils.ts
index d5dadd7e..b823b5a5 100644
--- a/sdks/typescript/server/src/utils.ts
+++ b/sdks/typescript/server/src/utils.ts
@@ -55,7 +55,7 @@ export function utf8ToBase64(str: string): string {
     );
     try {
       return btoa(str);
-    } catch (e) {
+    } catch (_e) {
       throw new Error(
         'MCP-UI SDK: Suitable UTF-8 to Base64 encoding method not found, and fallback btoa failed.',
       );
diff --git a/sdks/typescript/server/vite.config.ts b/sdks/typescript/server/vite.config.ts
index 2b8b7ebe..4dcbb46f 100644
--- a/sdks/typescript/server/vite.config.ts
+++ b/sdks/typescript/server/vite.config.ts
@@ -11,7 +11,6 @@ export default defineConfig({
       tsconfigPath: path.resolve(__dirname, 'tsconfig.json'),
       exclude: ['**/__tests__/**', '**/*.test.ts', '**/*.spec.ts'],
     }),
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
   ],
   build: {
     lib: {