Cursor rules that block deprecated, phantom, or incorrect NestJS imports, decora

Cursor rules that block deprecated, phantom, or incorrect NestJS imports, decora

When to use this skill

Cursor rules that block deprecated, phantom, or incorrect NestJS imports, decorators, providers, modules, and testing patterns.

Source

Synced from https://github.com/PatrickJS/awesome-cursorrules/tree/main/rules/nestjs-anti-hallucination-cursorrules-prompt-file.mdc.

NestJS Anti-Hallucination Rules

These rules OVERRIDE all other generation behavior. Check EVERY line of generated code against these rules.

Banned Imports & Phantom Packages

NEVER import these — they don't exist or are deprecated:

❌ @nestjs/core/decorators    — not a real export path
❌ @nestjs/swagger/decorators — import from @nestjs/swagger directly
❌ @nestjs/typeorm/repository — not a real export path
❌ @nestjs/passport/strategies — import from passport-jwt, passport-local, etc.
❌ @nestjs/bull/decorators     — import from @nestjs/bullmq (bull is legacy)
❌ nestjs-redis               — use @nestjs-modules/ioredis or ioredis directly
❌ @nestjs/cqrs/decorators    — import from @nestjs/cqrs directly
❌ nestjs-config              — use @nestjs/config (official)
❌ nestjs-pino/logger          — import from nestjs-pino directly

Correct import paths:

// ✅ Swagger
import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';

// ✅ TypeORM
import { InjectRepository } from '@nestjs/typeorm';
import { Repository, DataSource } from 'typeorm';

// ✅ BullMQ (NOT Bull)
import { InjectQueue, Processor, WorkerHost } from '@nestjs/bullmq';

// ✅ Config
import { ConfigService, ConfigModule } from '@nestjs/config';

// ✅ Passport
import { AuthGuard } from '@nestjs/passport';
import { Strategy as JwtStrategy, ExtractJwt } from 'passport-jwt';

// ✅ CQRS
import { CommandHandler, ICommandHandler, EventBus } from '@nestjs/cqrs';

Deprecated Patterns — NEVER Generate These

1. getRepository() outside providers

// ❌ DEPRECATED — removed in TypeORM 0.3+
const repo = getRepository(User);
const user = await getConnection().getRepository(User).find();

// ✅ CORRECT — inject via constructor
constructor(
  @InjectRepository(User)
  private readonly userRepo: Repository<User>,
) {}