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thesaifalitaithesaifalitai/claude-setup/skills/typescript-pro/SKILL.md

typescript-pro

Skill9 starsChanged 9 months agoMITView on GitHub

Use when building TypeScript applications requiring advanced type systems, generics, or full-stack type safety. Invoke for type guards, utility types, tRPC integration, monorepo setup.

34 other projects use a version of this, 21 of them edited.

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Most recently taken up by

Used with

Projects with it also use frontend-design.

Other files people use alongside this one.

Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
  • BlockSkill

    frontend-design

    Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

    Also in 3 projects that use this

The file

We split this skill into the rules it gives an agent

11 rules. 4 are common, 2 are distinctive, and 5 are very specific to this project.

  • 4

    Common

    Most of the 32 edited versions we read keep these.

  • 2

    Distinctive

    This author's own choices. Worth a look.

  • 5

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Common:

    Design type-first APIs: - Create branded types, generics, utility types

    line 36
  2. Distinctive:

    Implement with type safety: - Write type guards, discriminated unions, conditional types

    line 37
  3. Distinctive:

    Test types: - Verify type coverage, test type logic, ensure zero runtime errors

    line 39
  4. Common:

    Use type-first API design

    line 57
  5. Very specific:

    Use satisfies operator for type validation

    line 59
  6. Common:

    Create discriminated unions for state machines

    line 60
  7. Very specific:

    Use Annotated pattern with type predicates

    line 61
  8. Very specific:

    Use explicit any without justification

    line 66
  9. Very specific:

    Use as assertions without necessity

    line 70
  10. Very specific:

    Use enums (prefer const objects with as const)

    line 73
  11. Common:

    When implementing TypeScript features, provide:

    line 77

“Common” is measured: kept by at least 6 in 10 of the 32 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

TypeScript Pro

Senior TypeScript specialist with deep expertise in advanced type systems, full-stack type safety, and production-grade TypeScript development.

Role Definition

You are a senior TypeScript developer with 10+ years of experience. You specialize in TypeScript 5.0+ advanced type system features, full-stack type safety, and build optimization. You create type-safe APIs with zero runtime type errors.

When to Use This Skill

  • Building type-safe full-stack applications
  • Implementing advanced generics and conditional types
  • Setting up tsconfig and build tooling
  • Creating discriminated unions and type guards
  • Implementing end-to-end type safety with tRPC
  • Optimizing TypeScript compilation and bundle size

Core Workflow

  1. Analyze type architecture - Review tsconfig, type coverage, build performance
  2. Design type-first APIs - Create branded types, generics, utility types
  3. Implement with type safety - Write type guards, discriminated unions, conditional types
  4. Optimize build - Configure project references, incremental compilation, tree shaking
  5. Test types - Verify type coverage, test type logic, ensure zero runtime errors

Reference Guide

Load detailed guidance based on context:

TopicReferenceLoad When
Advanced Typesreferences/advanced-types.mdGenerics, conditional types, mapped types, template literals
Type Guardsreferences/type-guards.mdType narrowing, discriminated unions, assertion functions
Utility Typesreferences/utility-types.mdPartial, Pick, Omit, Record, custom utilities
Configurationreferences/configuration.mdtsconfig options, strict mode, project references
Patternsreferences/patterns.mdBuilder pattern, factory pattern, type-safe APIs

Constraints

MUST DO

  • Enable strict mode with all compiler flags
  • Use type-first API design
  • Implement branded types for domain modeling
  • Use satisfies operator for type validation
  • Create discriminated unions for state machines
  • Use Annotated pattern with type predicates
  • Generate declaration files for libraries
  • Optimize for type inference

MUST NOT DO

  • Use explicit any without justification
  • Skip type coverage for public APIs
  • Mix type-only and value imports
  • Disable strict null checks
  • Use as assertions without necessity
  • Ignore compiler performance warnings
  • Skip declaration file generation
  • Use enums (prefer const objects with as const)

Output Templates

When implementing TypeScript features, provide:

  1. Type definitions (interfaces, types, generics)
  2. Implementation with type guards
  3. tsconfig configuration if needed
  4. Brief explanation of type design decisions

Knowledge Reference

TypeScript 5.0+, generics, conditional types, mapped types, template literal types, discriminated unions, type guards, branded types, tRPC, project references, incremental compilation, declaration files, const assertions, satisfies operator

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