typescript-pro
Implements advanced TypeScript type systems, creates custom type guards, utility types, and branded types, and configures tRPC for end-to-end type safety. Use when building TypeScript applications requiring advanced generics, conditional or mapped types, discriminated unions, monorepo setup, or full-stack type safety with tRPC.
npx skills add Jeffallan/claude-skills --skill typescript-pro --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# TypeScript Pro ## 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; run `tsc --noEmit` to catch type errors before proceeding 4. **Optimize build** - Configure project references, incremental compilation, tree shaking; re-run `tsc --noEmit` to confirm zero errors after changes 5. **Test types** - Confirm type coverage with a tool like `type-coverage`; validate that all public APIs have explicit return types; iterate on steps 3–4 until all checks pass ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| | Advanced Types | `references/advanced-types.md` | Generics, conditional types, mapped types, template literals | | Type Guards | `references/type-guards.md` | Type narrowing, discriminated unions, assertion functions | | Utility Types | `references/utility-types.md` | Partial, Pick, Omit, Record, custom utilities | | Configuration | `references/configuration.md` | tsconfig options, stric
- Core Workflow
- Reference Guide
- Code Examples
- Branded Types
- Discriminated Unions & Type Guards
- Custom Utility Types
- Recommended tsconfig.json
- Constraints
- MUST DO
- MUST NOT DO
- Output Templates
- Knowledge Reference
What does the typescript-pro skill do?
Implements advanced TypeScript type systems, creates custom type guards, utility types, and branded types, and configures tRPC for end-to-end type safety. Use when building TypeScript applications requiring advanced generics, conditional or mapped types, discriminated unions, monorepo setup, or full-stack type safety with tRPC.
How do I install it?
Run `npx skills add Jeffallan/claude-skills --skill typescript-pro --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From Jeffallan/claude-skills, a repository with 10,871 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.