Can it help solve complex 'Type instantiation is excessively deep' errors?

Yes, it provides specific refactoring patterns such as replacing intersections with interfaces and breaking recursion with type aliases to resolve deep stack errors.

How does this skill improve TypeScript build times?

It implements performance strategies like skipLibCheck, incremental builds, and project references, while providing diagnostic commands to identify specific files causing compilation bottlenecks.

Does this skill support monorepo tools like Nx or Turborepo?

Yes, it includes a decision matrix for choosing between Nx and Turborepo and provides the necessary configuration steps for 'composite: true' and project references.

How does it handle JavaScript to TypeScript migrations?

It follows a proven incremental strategy, starting with allowJs/checkJs and gradually enabling strict mode features to ensure a safe and stable transition.

TypeScript Expert

Name: TypeScript Expert
Author: lev-os

bylev-os

0•

Developer Tools

Provides advanced type-level programming guidance, compiler performance optimization, and architectural patterns for modern TypeScript ecosystems.

This skill transforms Claude into a senior TypeScript architect capable of solving complex type-level challenges and optimizing large-scale codebases for maximum maintainability. It offers deep expertise in high-level patterns like branded types and recursive conditional types, alongside practical solutions for compiler performance-tuning and monorepo management. Whether you are migrating from legacy JavaScript, debugging cryptic 'excessive stack depth' errors, or deciding between Biome and ESLint, this skill provides the diagnostic commands and best practices required to build robust, type-safe applications.

Key Features

01Comprehensive monorepo support for Nx and Turborepo with project references.

02Automated migration paths for JavaScript to TypeScript and CJS to ESM transitions.

03Compiler performance optimization using diagnostic tracing and incremental build strategies.

04Advanced type-level engineering including nominal branding and recursive conditional types.

050 GitHub stars

06Integration expertise for modern toolchains including Biome, ESLint, and Vitest type-testing.

Use Cases

01Diagnosing and resolving slow IDE performance or long CI/CD type-check durations.

02Scaling a single-package repository into a high-performance, multi-package monorepo.

03Refactoring complex domain logic into type-safe architectures to prevent primitive obsession.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lev-os/agents typescript-expert

For use in Claude.ai and ChatGPT

Download Skill