# Build Type-Safe TypeScript Apps

TypeScript teams often lose type safety between validation, APIs, database models, and UI code. This skill shows how to connect Zod, tRPC, Prisma, and TypeScript patterns into one typed workflow.

## Install

```bash
npx skillstore add ai agent hub/ariegoldkin-type-safety-validation
```

## Metadata

- - Slug: ariegoldkin-type-safety-validation
- - Version: 1.0.0
- - Author: AI Agent Hub
- - GitHub username: ArieGoldkin
- - License: MIT
- - Repository: https://github.com/ArieGoldkin/ai-agent-hub/tree/main/skills/type-safety-validation
- - Ref: main
- - Supported tools: Claude, Codex, Claude Code
- - Risk level: low
- - Risk factors: external\_commands, network, filesystem
- - Quality score: 77
- - Quality tier: bronze
- - Public page: https://skillstore.pages.dev/skills/ariegoldkin-type-safety-validation
- - Manifest: https://skillstore.pages.dev/api/skills/ariegoldkin-type-safety-validation/manifest

## Capabilities

- Explains Zod schemas, inferred types, refinements, transforms, and discriminated unions.
- Shows tRPC server and client patterns for typed API procedures.
- Demonstrates Prisma schema and query examples with typed results.
- Connects backend and frontend examples in a Next.js-style tRPC workflow.
- Lists practical TypeScript configuration and validation best practices.

## Use Cases

- Design a Typed API: Plan request validation, response types, and client usage before implementing a new TypeScript API.
- Improve Form And Input Validation: Convert informal validation rules into reusable Zod schemas with clear error handling.
- Audit Full-Stack Type Boundaries: Review where database, API, and UI types diverge, then create a safer shared contract.

## Prompt Templates

### Create a Basic Zod Schema

```
Help me define a Zod schema for this user input shape. Include inferred TypeScript types and safe error handling.
```

### Design a tRPC Procedure

```
Design a tRPC procedure for this feature. Include input validation, output shape, and client usage guidance.
```

### Connect Prisma and Validation

```
Review this Prisma model and suggest matching validation schemas for create, update, and query operations.
```

### Audit End-to-End Type Safety

```
Audit this TypeScript feature for type-safety gaps across UI, API, validation, and database layers. Prioritize fixes by risk.
```

## Limitations

- It is a documentation-only skill and does not run validation tools automatically.
- Examples need adaptation for project-specific authentication and authorization rules.
- It does not cover every TypeScript framework or database provider.
- Some version references may need confirmation against current package releases.

## Best Practices

- Validate data at every external boundary, including forms, APIs, webhooks, and environment variables.
- Derive TypeScript types from validation schemas or API routers instead of duplicating contracts.
- Add authentication and authorization checks around write operations before using examples in production.

## Anti Patterns

- Do not rely only on compile-time types for untrusted runtime input.
- Do not copy public write procedure examples into production without access control.
- Do not silence type errors with any when a schema or type guard can model the data.

## Security Audit

- - Safe to publish: true
- - Audited at: 2026-06-28T10:43:09.373\+00:00
- - Summary: The static analyzer flagged many high-risk patterns, but review shows they are markdown code fences, TypeScript examples, documentation URLs, and relative imports. No malicious behavior or prompt injection was found. One low-risk documentation issue remains because a sample tRPC mutation uses publicProcedure without showing authentication.

## Stats

- - Views: 175
- - Downloads: 6
- - Favorites: 0
- - Popularity score: 0