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# Understanding WebSocket Security ## Introduction WebSockets enable real-time communication but introduce security challenges. This guide covers essential protections. ## The Security Model WebSockets operate at a different layer than HTTP, requiring different security approaches. ## Authentication ### Token-Based Auth “`javascript const ws = new WebSocket(‘wss://api.example.com/ws’, [], { headers: { ‘Authorization’: `Bearer ${token}` } }); […]

# The Modern JavaScript Build Toolchain ## Introduction The JS ecosystem has evolved rapidly. Here’s what actually matters in 2026. ## The Stack ### Bundlers – **Vite** – Development speed, HMR – **esbuild** – Extreme speed – **Rollup** – Library builds ### Package Managers – **pnpm** – Disk space, monorepos – **bun** – Speed, built-in

# The Complete PostgreSQL Performance Guide ## Introduction PostgreSQL is the backbone of most modern applications. This guide covers optimization techniques that actually move the needle. ## Configuration Tuning ### Memory Settings “`sql shared_buffers = 256MB — 25% of RAM effective_cache_size = 768MB work_mem = 16MB maintenance_work_mem = 128MB “` ### Connection Pooling Use PgBouncer

# GitHub Actions CI/CD Pipeline Mastery ## Introduction GitHub Actions is the most popular CI/CD platform. This guide covers patterns that scale. ## Basic Workflow “`yaml name: CI on: [push, pull_request] jobs: build: runs-on: ubuntu-latest steps: – uses: actions/checkout@v4 – uses: actions/setup-node@v4 with: node-version: ’20’ – run: npm ci – run: npm test “` ##

# Docker Compose Deep Dive: From Development to Production ## Introduction Docker Compose is the bridge between local development and production deployment. This guide covers everything from basic orchestration to production-ready configurations. ## Why Docker Compose – Define your entire stack in one file – Reproducible environments across machines – Easy local development setup –

# The Rise of AI Agents: What Developers Need to Know ## What Are AI Agents? AI agents are autonomous systems that can: 1. **Plan** multi-step tasks 2. **Execute** actions across tools 3. **Reason** about intermediate results 4. **Adapt** based on feedback ### Not Just LLMs An LLM generates text. An agent uses LLM to

# Self-Hosting Guide: Cost-Effective Infrastructure ## Why Self-Host? | Factor | Cloud | Self-Hosted | |——–|——-|————-| | Upfront cost | $0 | $2,000-10,000 | | Monthly cost | $100-1000+ | $20-100 | | Control | Limited | Full | | Maintenance | Managed | You handle | | Scalability | Instant | Hardware limits |

# React vs Vue vs Angular: 2026 Decision Guide ## TL;DR Recommendation | Scenario | Recommendation | Why | |———-|—————|—–| | Startup, fast iteration | Vue 3 | Fastest learning curve, flexible | | Enterprise, large team | Angular | Built-in patterns, TypeScript | | Performance-critical | React | Largest ecosystem, virtualization | | New