Imagine you’re building a house. You could buy land, lay the foundation, install plumbing, wire electricity, build walls, and so on. Or you could move into a fully-equipped building where infrastructure is already handled, and you just focus on decorating and living. Cloudflare is that fully-equipped building for the internet. It’s a platform that handles the hard infrastructure problems (speed, security, scaling) so you can focus on building your SaaS product. ...

Using OpenAI APIs in frontend code is risky — exposing your API key is a security hazard. The solution is a Cloudflare Worker that acts as a secure proxy. Your frontend calls the worker; the worker calls OpenAI with your key. The key stays secret. This guide is beginner-friendly, ELI5 style, and gradually moves to advanced techniques like streaming, caching, and rate-limiting. Beginner: Why You Need a Proxy Imagine you have a magic key that unlocks a powerful AI genie. If you give that key to everyone, anyone can spend your genie’s wishes. That’s what happens if you put your API key in frontend code. ...

Table of Contents Introduction: Why Real-Time Communication Matters Understanding HTTP First (The Foundation) The WebSocket Protocol (The Game Changer) Socket.IO (WebSockets on Steroids) Building Your First WebSocket Application Advanced Patterns and Architectures Production Considerations and Scaling Useful Resources Introduction: Why Real-Time Communication Matters Imagine you’re having a conversation with a friend. In the old days of the web (and still today for most websites), it was like passing notes back and forth: ...

Chrome extensions allow you to deeply customize and enhance your browsing experience. Whether you want to modify webpages, create productivity tools, automate tasks, or publish to the Chrome Web Store, extensions provide a powerful yet beginner-friendly platform. This guide takes you from the fundamentals to a fully functioning extension, using Manifest V3, the current standard for Chrome and Chromium-based browsers. Understanding the Chrome Extension Architecture Every Chrome extension is built from the following core components: ...

Master the art of context window management to build high-performance AI agents “A focused agent is a performant agent. Context engineering is the name of the game for high-value engineering in the age of agents.” Table of Contents Foundation What is Context Engineering? The R&D Framework Level 1: Beginner - Reduction Techniques 1.1 Eliminate Wasteful MCP Server Loading 1.2 Context Priming Over Large Memory Files Level 2: Intermediate - Delegation with Sub-Agents 2.1 Understanding Sub-Agents 2.2 Implementing Sub-Agent Workflows Level 3: Advanced - Active Context Management 3.1 Context Bundles 3.2 Session Recovery Workflows Level 4: Agentic - Multi-Agent Orchestration 4.1 Primary Multi-Agent Delegation 4.2 Background Agent Workflows 4.3 Agent Experts Pattern Resources & Next Steps Foundation What is Context Engineering? Context Engineering is the discipline of managing your AI agent’s context window to maximize performance, minimize waste, and scale your agent systems effectively. ...