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trpc

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tRPC end-to-end type safety, procedures, routers, middleware, and React integration.

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How to use this skill

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  3. Review the proposed files and risks before you approve installation.
Prompt to paste
I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/web-development/skills/trpc/SKILL.md

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Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

tRPC Skill

Expert assistance for building type-safe APIs with tRPC.

Capabilities

  • Create type-safe procedures and routers
  • Implement middleware for auth/validation
  • Set up tRPC with Next.js/React
  • Handle subscriptions
  • Configure error handling
  • Build type-safe client hooks

Usage

Invoke this skill when you need to:

  • Build end-to-end type-safe APIs
  • Integrate with React/Next.js
  • Replace REST with type-safe RPC
  • Implement real-time features

Patterns

Router Definition

// server/trpc/routers/user.ts
import { z } from 'zod';
import { router, publicProcedure, protectedProcedure } from '../trpc';
import { TRPCError } from '@trpc/server';

export const userRouter = router({
  list: protectedProcedure
    .input(z.object({
      page: z.number().min(1).default(1),
      limit: z.number().min(1).max(100).default(10),
      search: z.string().optional(),
    }))
    .query(async ({ ctx, input }) => {
      const users = await ctx.prisma.user.findMany({
        where: input.search
          ? { name: { contains: input.search } }
          : undefined,
        skip: (input.page - 1) * input.limit,
        take: input.limit,
      });
      return users;
    }),

  byId: protectedProcedure
    .input(z.string())
    .query(async ({ ctx, input }) => {
      const user = await ctx.prisma.user.findUnique({
        where: { id: input },
      });
      if (!user) {
        throw new TRPCError({ code: 'NOT_FOUND' });
      }
      return user;
    }),

  create: protectedProcedure
    .input(z.object({
      name: z.string().min(1),
      email: z.string().email(),
    }))
    .mutation(async ({ ctx, input }) => {
      return ctx.prisma.user.create({ data: input });
    }),
});

React Integration

// In component
const { data, isLoading } = trpc.user.list.useQuery({ page: 1 });
const createUser = trpc.user.create.useMutation();

<button onClick={() => createUser.mutate({ name, email })}>
  Create
</button>

Best Practices

  • Use Zod for input validation
  • Implement proper middleware
  • Leverage type inference
  • Handle errors consistently

Target Processes

  • t3-stack-development
  • nextjs-full-stack
  • type-safe-api