Mmcp.market

typescript-pro skill

by zebbern·zebbern/claude-code-guide·4.6k stars·MIT

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.

A100/100content scan

Is the typescript-pro skill safe?

Clean: nothing in its files matched our rules. We read 6 files in the folder on 2026-09-28.

No findings.

Install the typescript-pro skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description. 

git clone --depth 1 https://github.com/zebbern/claude-code-guide.git /tmp/claude-code-guide
mkdir -p ~/.claude/skills
cp -r /tmp/claude-code-guide/skills/typescript-pro ~/.claude/skills/typescript-pro
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

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:

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

More skills from zebbern/claude-code-guide

  • Aacademic-paper-reviewerSimulates academic peer review, evaluating papers across Originality, Methodology, Results, and Writing to provide Major/Minor Revision recommendations with actionable feedback. Triggers when a user asks to \"review my paper,\" \"simulate peer review,\" or \"give my paper a peer review.
  • Aactive-directory-attacksThis skill should be used when the user asks to "attack Active Directory", "exploit AD", "Kerberoasting", "DCSync", "pass-the-hash", "BloodHound enumeration", "Golden Ticket", "Silver Ticket", "AS-REP roasting", "NTLM relay", or needs guidance on Windows domain penetration testing.
  • Capi-fuzzing-bug-bountyThis skill should be used when the user asks to "test API security", "fuzz APIs", "find IDOR vulnerabilities", "test REST API", "test GraphQL", "API penetration testing", "bug bounty API testing", or needs guidance on API security assessment techniques.
  • Aapi-shape-explorerGenerate multiple radically different interface designs for a module using parallel sub-agents. Use when user wants to design an API, explore interface options, compare module shapes, or mentions "design it twice".
  • Aaudit-flowInteractive system flow tracing across CODE, API, AUTH, DATA, NETWORK layers with SQLite persistence and Mermaid export. Use for security audits, compliance documentation, flow tracing, feature ideation, brainstorming, debugging, architecture reviews, or incident post-mortems. Triggers on audit, trace flow, document flow, security review, debug flow, brainstorm, architecture review, post-mortem, incident review.
  • Aauthentication-patternsAuthentication patterns: session vs JWT vs OAuth comparison, provider selection (NextAuth, Clerk, Supabase Auth), security checklist, and common mistakes. Use when implementing auth, reviewing auth flows, or choosing auth providers.
  • Aaws-penetration-testingThis skill should be used when the user asks to "pentest AWS", "test AWS security", "enumerate IAM", "exploit cloud infrastructure", "AWS privilege escalation", "S3 bucket testing", "metadata SSRF", "Lambda exploitation", or needs guidance on Amazon Web Services security assessment.
  • Abroken-authenticationThis skill should be used when the user asks to "test for broken authentication vulnerabilities", "assess session management security", "perform credential stuffing tests", "evaluate password policies", "test for session fixation", or "identify authentication bypass flaws". It provides comprehensive techniques for identifying authentication and session management weaknesses in web applications.
  • Cburp-suite-testingThis skill should be used when the user asks to "intercept HTTP traffic", "modify web requests", "use Burp Suite for testing", "perform web vulnerability scanning", "test with Burp Repeater", "analyze HTTP history", or "configure proxy for web testing". It provides comprehensive guidance for using Burp Suite's core features for web application security testing.
  • AcachingCaching strategies — invalidation, TTL guidelines, cache keys, cache layers, and when not to cache. Use when implementing or reviewing caching logic.
  • Achart-imageGenerate publication-quality PNG chart images from data, supporting line, bar, area, candlestick, pie, and heatmap charts. Triggers when the user asks to visualize data, create a graph, plot a time series, or generate a chart for a report, alert, or dashboard. Runs as a lightweight, headless Node.js process without a browser.
  • Dcloud-penetration-testingThis skill should be used when the user asks to "perform cloud penetration testing", "assess Azure or AWS or GCP security", "enumerate cloud resources", "exploit cloud misconfigurations", "test O365 security", "extract secrets from cloud environments", or "audit cloud infrastructure". It provides comprehensive techniques for security assessment across major cloud platforms.

All agent skills → · MCP servers