Does this skill require external libraries?

While many patterns are native, it highly recommends @total-typescript/ts-reset to fix 'any' leaks in the standard library and type-fest for complex type manipulation.

Why is strict: true not enough for TypeScript projects?

Standard strict mode still allows for common pitfalls like unchecked array access (returning undefined as the element type) and ambiguous optional properties. This skill enforces flags that treat these as errors, ensuring total type honesty.

What is the benefit of erasableSyntaxOnly?

Introduced in TS 5.8, this flag ensures your code doesn't use features that require transpilation (like enums), making your codebase compatible with faster, native TypeScript runners like Bun and Deno.

How does this skill improve build performance?

By enforcing verbatimModuleSyntax and avoiding barrel files, the skill reduces the heuristics the compiler must perform, leading to faster compilation times and more efficient tree-shaking.

Can I use this with existing ESLint configurations?

Yes, the skill provides a specific set of 'strict-type-checked' rules that can be integrated into your eslint.config.js to automate the enforcement of these patterns.

Strict TypeScript Patterns

Name: Strict TypeScript Patterns
Author: jagreehal

byjagreehal

開発者ツール

Enforces advanced TypeScript safety and compile-time patterns to eliminate runtime errors and improve code quality beyond standard strict mode.

概要

This skill transforms Claude into a senior TypeScript architect, enforcing rigorous type-safety configurations that go beyond standard strict mode. It provides specific guidance on implementing modern flags like noUncheckedIndexedAccess and erasableSyntaxOnly, integrates utility libraries like ts-reset and type-fest, and promotes advanced patterns such as branded types and type guards over unsafe assertions. It is ideal for teams building mission-critical applications where type correctness, build performance, and compatibility with native TypeScript runners like Node.js 22+, Bun, and Deno are paramount.

主な機能

Enforces modern erasable syntax for compatibility with native TS runners
Configures advanced tsconfig.json flags for maximum type safety
0 GitHub stars
Provides strict ESLint rules to ban unsafe patterns like 'any' and type assertions
Implements advanced type-level patterns including branded and template literal types
Integrates ts-reset to fix type leaks in standard library functions like JSON.parse

ユースケース

Hardening existing TypeScript projects against silent runtime failures from undefined array access
Migrating legacy codebases from unsafe type assertions to robust type guards and Zod validation
Optimizing build performance and tree-shaking by eliminating barrel files and non-explicit imports

概要

主な機能

Enforces modern erasable syntax for compatibility with native TS runners
Configures advanced tsconfig.json flags for maximum type safety
0 GitHub stars
Provides strict ESLint rules to ban unsafe patterns like 'any' and type assertions
Implements advanced type-level patterns including branded and template literal types
Integrates ts-reset to fix type leaks in standard library functions like JSON.parse

ユースケース

Hardening existing TypeScript projects against silent runtime failures from undefined array access
Migrating legacy codebases from unsafe type assertions to robust type guards and Zod validation
Optimizing build performance and tree-shaking by eliminating barrel files and non-explicit imports