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TypeScript Pro

Writes advanced TypeScript types, type guards, and tRPC setups for stronger type safety

Source Download skill
Repository
Jeffallan/claude-skills
Stars
12,176
Licence
MIT
Files
6 files

What it does

When installed, the agent gets specialist guidance for TypeScript's type system: generics, conditional and mapped types, discriminated unions, branded types, and custom type guards. It also knows how to set up strict tsconfig.json files, project references for monorepos, and tRPC for end-to-end type safety between client and server. It runs type checks such as tsc --noEmit as it works and loads detailed reference notes on specific topics when needed.

Great for

  • Developers building TypeScript apps who want stricter, more expressive types
  • Teams setting up a monorepo or strict tsconfig with project references
  • Full-stack developers wiring up tRPC for shared client and server types

Skip it if

  • Complete beginners who are still learning basic TypeScript syntax, since the output assumes working knowledge of generics and types
  • Projects not using TypeScript, where the guidance does not apply

Try asking

  • “Create branded types for UserId and OrderId so they cannot be mixed up at compile time”
  • “Set up a strict tsconfig.json with project references for my monorepo”
  • “Refactor this state object into a discriminated union with an exhaustive switch”
  • “Add a tRPC router with end-to-end types for my existing Express API”
Step-by-step guide: how to use TypeScript ProInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 6 original files, the MIT licence and an attribution note.

    typescript-pro.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip typescript-pro.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip typescript-pro.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Name the TypeScript version and project setup (monorepo, Node, browser) so the tsconfig and module advice fits your environment.
  • Ask for one topic at a time, such as type guards or tRPC, for more focused answers.
  • Review generated tsconfig changes before applying them, since strict flags like exactOptionalPropertyTypes can surface many errors in existing code.

What's inside

  • references/advanced-types.md
  • references/configuration.md
  • references/patterns.md
  • references/type-guards.md
  • references/utility-types.md
  • SKILL.md

Redistributed unmodified from Jeffallan/claude-skills under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.