name: typescript
description: TypeScript best practices with strict typing for type-safe development.
skills:
- conventions
- javascript
dependencies:
typescript: ">=5.0.0 <6.0.0"
allowed-tools:
- documentation-reader
- web-search

TypeScript Skill

Overview

Comprehensive TypeScript guidance with focus on strict typing, type safety, and modern TypeScript features.

Objective

Enable developers to write type-safe code with proper TypeScript patterns, avoiding any, and leveraging advanced type features.

Conventions

Refer to conventions for:

• Code organization
• Naming patterns

Refer to javascript for:

• Modern JavaScript features
• Async patterns

TypeScript Specific

• Enable strict mode in tsconfig.json
• Avoid any type - use unknown when type is uncertain
• Use interfaces for object shapes
• Use type aliases for unions and intersections
• Leverage generics for reusable components
• Use utility types (Partial, Pick, Omit, etc.)

Example

interface User {
  id: number;
  name: string;
  email: string;
}

type UserUpdate = Partial<Pick<User, "name" | "email">>;

function updateUser<T extends User>(user: T, updates: UserUpdate): T {
  return { ...user, ...updates };
}

const result: User = updateUser(
  { id: 1, name: "John", email: "[email protected]" },
  { name: "Jane" },
);

References

• https://www.typescriptlang.org/docs/
• https://www.typescriptlang.org/tsconfig