diff --git a/app/tsconfig.json b/app/tsconfig.json
deleted file mode 100644
index 834e525f..00000000
--- a/app/tsconfig.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-  "compilerOptions": {
-    "useDefineForClassFields": true,
-    "skipLibCheck": true,
-    "module": "ESNext",
-    /* Bundler mode */
-    "moduleResolution": "bundler",
-    "allowImportingTsExtensions": true,
-    "resolveJsonModule": true,
-    "isolatedModules": true,
-    "noEmit": true,
-    "jsx": "react-jsx",
-
-    /* Linting */
-    "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true
-  }
-}
diff --git a/bridges/nodejs/src/sdk/types.ts b/bridges/nodejs/src/sdk/types.ts
index 88d80cd2..7d0d0f32 100644
--- a/bridges/nodejs/src/sdk/types.ts
+++ b/bridges/nodejs/src/sdk/types.ts
@@ -22,7 +22,7 @@ export type ActionFunction = (params: ActionParams) => Promise<void>
  */
 export interface Answer {
   key?: string
-  widget?: Widget<unknown>
+  widget?: Widget
   data?: AnswerData
   core?: SkillAnswerCoreData
 }
@@ -30,7 +30,7 @@ export interface TextAnswer extends Answer {
   key: string
 }
 export interface WidgetAnswer extends Answer {
-  widget: Widget<unknown>
+  widget: Widget
   key?: string
 }
 export type AnswerData = Record<string, string | number> | null
diff --git a/bridges/nodejs/src/sdk/widget-component.ts b/bridges/nodejs/src/sdk/widget-component.ts
index 59d5c0e2..84b93dba 100644
--- a/bridges/nodejs/src/sdk/widget-component.ts
+++ b/bridges/nodejs/src/sdk/widget-component.ts
@@ -1,4 +1,4 @@
-export abstract class WidgetComponent<T> {
+export abstract class WidgetComponent<T = unknown> {
   public readonly component: string
   public readonly props: T
 
diff --git a/bridges/nodejs/src/sdk/widget.ts b/bridges/nodejs/src/sdk/widget.ts
index 82f95142..92a6afac 100644
--- a/bridges/nodejs/src/sdk/widget.ts
+++ b/bridges/nodejs/src/sdk/widget.ts
@@ -2,25 +2,20 @@ import { type WidgetWrapperProps } from '@leon-ai/aurora'
 
 import { WidgetComponent } from '@sdk/widget-component'
 
-export interface WidgetOptions<T> {
+export interface WidgetOptions<T = unknown> {
   wrapperProps?: Omit<WidgetWrapperProps, 'children'>
-  params?: T
+  params: T
 }
 
-export abstract class Widget<T> {
+export abstract class Widget<T = unknown> {
   public wrapperProps: WidgetOptions<T>['wrapperProps']
   public params: WidgetOptions<T>['params']
 
-  protected constructor(options?: WidgetOptions<T>) {
+  protected constructor(options: WidgetOptions<T>) {
     if (options?.wrapperProps) {
       this.wrapperProps = options.wrapperProps
     }
-
-    if (!options?.params) {
-      this.params = undefined
-    } else {
-      this.params = options.params
-    }
+    this.params = options.params
   }
 
   public abstract render(): WidgetComponent<unknown>
diff --git a/skills/unknown/widget-playground/src/actions/run.ts b/skills/unknown/widget-playground/src/actions/run.ts
index 370501bd..2c6183da 100644
--- a/skills/unknown/widget-playground/src/actions/run.ts
+++ b/skills/unknown/widget-playground/src/actions/run.ts
@@ -1,7 +1,7 @@
 import type { ActionFunction } from '@sdk/types'
 import { leon } from '@sdk/leon'
 
-import PlaygroundTestWidget from '../widgets/playground-test'
+import { PlaygroundTestWidget } from '../widgets/playground-test'
 
 export const run: ActionFunction = async function () {
   /**
diff --git a/skills/unknown/widget-playground/src/widgets/playground-test.ts b/skills/unknown/widget-playground/src/widgets/playground-test.ts
index 6ca1a96c..0c4613bc 100644
--- a/skills/unknown/widget-playground/src/widgets/playground-test.ts
+++ b/skills/unknown/widget-playground/src/widgets/playground-test.ts
@@ -7,20 +7,13 @@ interface Params {
   value2: string
 }
 
-export default class PlaygroundTestWidget extends Widget<Params> {
-  constructor(options?: WidgetOptions<Params>) {
+export class PlaygroundTestWidget extends Widget<Params> {
+  constructor(options: WidgetOptions<Params>) {
     super(options)
   }
 
-  public render(): WidgetComponent<unknown> {
-    let children = 'Click me'
-
-    if (this.params) {
-      children = this.params.value1 + ' ' + this.params.value2
-    }
-
-    return new Button({
-      children
-    })
+  public render(): WidgetComponent {
+    const children = this.params.value1 + ' ' + this.params.value2
+    return new Button({ children })
   }
 }