davidcsejtei

Claude Code – Project Guidelines (David’s Style)

This file defines mandatory rules for all code generation and modifications. If any rule would be violated, stop and fix the solution to fully comply with these guidelines.

---

0) Global Principles (always)

• TypeScript everywhere (backend + frontend).

davidcsejtei

docker exec -it $(docker ps -qf "name=postgres") psql -U postgres -d demo -c \
"CREATE TABLE IF NOT EXISTS public.customers (
  id SERIAL PRIMARY KEY,
  name VARCHAR(255),
  email VARCHAR(255)
);"

davidcsejtei

import { Injectable } from '@nestjs/common';
import { PinoLogger } from 'nestjs-pino';
import { Server, Socket } from 'socket.io';
import { RoomType } from '../../types/socket-room.types';

@Injectable()
export class SocketRoomService {
  private socketServer: Server;

  constructor(private readonly logger: PinoLogger) {}

davidcsejtei

ABCD-5432 JIRA ticket:

Improve the API with a /devices endpoint. The endpoint's functionality comes from the attached Product Specification Documentation.

Definition of Done:

- The /devices endpoint returns the devices array following the sample data structure contained in the related documentation.
- If the company doesn't have any devices at the selected address → /devices returns an empty array.

How to demo (with the UI parts):

davidcsejtei

services:
  zookeeper:
    image: confluentinc/cp-zookeeper:7.6.0
    ports:
      - '2181:2181'
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  kafka:

davidcsejtei

npx esbuild main.js --bundle --outfile=bundle.js
vs
npx esbuild app.js --bundle --format=esm --outfile=bundle.js

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version: '3'
services:
  zookeeper:
    image: confluentinc/cp-zookeeper:7.5.0
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181

  kafka:
    image: confluentinc/cp-kafka:7.5.0
    depends_on:

davidcsejtei

version: '3.8'

services:
  mongo:
    image: mongo:7
    container_name: mongodb
    restart: always
    ports:
      - '27017:27017'
    volumes:

davidcsejtei

version: '3.8'

services:
  redis:
    image: redis:7-alpine
    container_name: redis-local
    ports:
      - '6379:6379'
    networks:
      - redis-net

davidcsejtei

class LRUCache {
  constructor(capacity) {
    this.capacity = capacity
    this.cache = new Map()
  }

  get(key) {
    if (this.cache.has(key)) {
      // If the key exists in the cache, move it to the front
      const value = this.cache.get(key)