What is the benefit of noUncheckedIndexedAccess?

It ensures that index signatures return T | undefined, forcing you to handle potential missing keys and reducing runtime errors.

Does this skill help with ESM migration?

Absolutely, it provides guidance on verbatimModuleSyntax and proper module resolution settings to align with Node.js ESM behavior.

Can I use this for both frontend and backend projects?

Yes, it includes specific templates for bundlers like Vite and Bun, as well as Node.js using NodeNext resolution.

Why use this skill instead of just setting strict: true?

While strict: true is a great start, this skill adds modern 2025 flags like noImplicitOverride and exactOptionalPropertyTypes that aren't included in the basic strict umbrella.

What version of TypeScript does this skill support?

This skill is optimized for TypeScript 5.x and aligns with 2025 best practices for modern development.

TypeScript Strict Mode Setup

Name: TypeScript Strict Mode Setup
Author: laurigates

bylaurigates

•

Developer Tools

Configures and optimizes TypeScript projects with strict type-checking flags and modern 2025 configuration templates.

About

This skill empowers Claude to implement maximum type safety in TypeScript projects by providing expert-level guidance on tsconfig.json configurations. It covers essential modern flags like noUncheckedIndexedAccess and verbatimModuleSyntax, while offering tailored templates for Bundlers (Vite/Bun) and Node.js (NodeNext) environments. It is particularly useful when initiating new projects or migrating existing codebases to a more robust, bug-resistant type system that leverages the full power of TypeScript 5.x.

Key Features

Comprehensive implementation of strict flags like noImplicitAny and strictNullChecks
Expert guidance on moduleResolution strategies for different environments
Pre-configured tsconfig.json templates for Vite, Bun, and Node.js
Support for noUncheckedIndexedAccess to prevent common runtime index errors
Modern verbatimModuleSyntax enforcement for cleaner ESM imports
3 GitHub stars

Use Cases

Migrating legacy JavaScript or loose TypeScript codebases to strict mode
Initializing a new production-ready TypeScript project with maximum safety
Resolving complex module resolution and ESM interop issues in 2025 environments

About

Key Features

Comprehensive implementation of strict flags like noImplicitAny and strictNullChecks
Expert guidance on moduleResolution strategies for different environments
Pre-configured tsconfig.json templates for Vite, Bun, and Node.js
Support for noUncheckedIndexedAccess to prevent common runtime index errors
Modern verbatimModuleSyntax enforcement for cleaner ESM imports
3 GitHub stars

Use Cases

Migrating legacy JavaScript or loose TypeScript codebases to strict mode
Initializing a new production-ready TypeScript project with maximum safety
Resolving complex module resolution and ESM interop issues in 2025 environments