UEA-Prodem

node_modules/@trpc/server/skills/trpc-router/SKILL.md

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+---
+name: trpc-router
+description: >
+  Entry point for all tRPC skills. Decision tree routing by task: initTRPC.create(),
+  t.router(), t.procedure, createTRPCClient, adapters, subscriptions, React Query,
+  Next.js, links, middleware, validators, error handling, caching, FormData.
+type: core
+library: trpc
+library_version: '11.16.0'
+requires: []
+sources:
+  - 'trpc/trpc:www/docs/main/introduction.mdx'
+  - 'trpc/trpc:www/docs/main/quickstart.mdx'
+---
+
+# tRPC -- Skill Router
+
+## Decision Tree
+
+### What are you trying to do?
+
+#### Define a tRPC backend (server)
+
+- **Initialize tRPC, define routers, procedures, context, export AppRouter**
+  -> Load skill: `server-setup`
+
+- **Add middleware (.use), auth guards, logging, base procedures**
+  -> Load skill: `middlewares`
+
+- **Add input/output validation with Zod or other libraries**
+  -> Load skill: `validators`
+
+- **Throw typed errors, format errors for clients, global error handling**
+  -> Load skill: `error-handling`
+
+- **Call procedures from server code, write integration tests**
+  -> Load skill: `server-side-calls`
+
+- **Set Cache-Control headers on query responses (CDN, browser caching)**
+  -> Load skill: `caching`
+
+- **Accept FormData, File, Blob, or binary uploads in mutations**
+  -> Load skill: `non-json-content-types`
+
+- **Set up real-time subscriptions (SSE or WebSocket)**
+  -> Load skill: `subscriptions`
+
+#### Host the tRPC API (adapters)
+
+- **Node.js built-in HTTP server (simplest, local dev)**
+  -> Load skill: `adapter-standalone`
+
+- **Express middleware**
+  -> Load skill: `adapter-express`
+
+- **Fastify plugin**
+  -> Load skill: `adapter-fastify`
+
+- **AWS Lambda (API Gateway v1/v2, Function URLs)**
+  -> Load skill: `adapter-aws-lambda`
+
+- **Fetch API / Edge (Cloudflare Workers, Deno, Vercel Edge, Astro, Remix)**
+  -> Load skill: `adapter-fetch`
+
+#### Consume the tRPC API (client)
+
+- **Create a vanilla TypeScript client, configure links, headers, types**
+  -> Load skill: `client-setup`
+
+- **Configure link chain (batching, streaming, splitting, WebSocket, SSE)**
+  -> Load skill: `links`
+
+- **Use SuperJSON transformer for Date, Map, Set, BigInt**
+  -> Load skill: `superjson`
+
+#### Use tRPC with a framework
+
+- **React with TanStack Query (useQuery, useMutation, queryOptions)**
+  -> Load skill: `react-query-setup`
+
+- **Next.js App Router (RSC, server components, HydrateClient)**
+  -> Load skill: `nextjs-app-router`
+
+- **Next.js Pages Router (withTRPC, SSR, SSG helpers)**
+  -> Load skill: `nextjs-pages-router`
+
+#### Advanced patterns
+
+- **Generate OpenAPI spec, REST client from tRPC router**
+  -> Load skill: `openapi`
+
+- **Multi-service gateway, custom routing links, SOA**
+  -> Load skill: `service-oriented-architecture`
+
+- **Auth middleware + client headers + subscription auth**
+  -> Load skill: `auth`
+
+## Quick Reference: Minimal Working App
+
+```ts
+// server/trpc.ts
+import { initTRPC } from '@trpc/server';
+
+const t = initTRPC.create();
+
+export const router = t.router;
+export const publicProcedure = t.procedure;
+```
+
+```ts
+// server/appRouter.ts
+import { z } from 'zod';
+import { publicProcedure, router } from './trpc';
+
+export const appRouter = router({
+  hello: publicProcedure
+    .input(z.object({ name: z.string() }))
+    .query(({ input }) => ({ greeting: `Hello ${input.name}` })),
+});
+
+export type AppRouter = typeof appRouter;
+```
+
+```ts
+// server/index.ts
+import { createHTTPServer } from '@trpc/server/adapters/standalone';
+import { appRouter } from './appRouter';
+
+const server = createHTTPServer({ router: appRouter });
+server.listen(3000);
+```
+
+```ts
+// client/index.ts
+import { createTRPCClient, httpBatchLink } from '@trpc/client';
+import type { AppRouter } from '../server/appRouter';
+
+const trpc = createTRPCClient<AppRouter>({
+  links: [httpBatchLink({ url: 'http://localhost:3000' })],
+});
+
+const result = await trpc.hello.query({ name: 'World' });
+```
+
+## See Also
+
+- `server-setup` -- full server initialization details
+- `client-setup` -- full client configuration
+- `adapter-standalone` -- simplest adapter for getting started
+- `react-query-setup` -- React integration
+- `nextjs-app-router` -- Next.js App Router integration