Day 3: Mastering Prompt Templates — Stop Hardcoding Your Logic! 🧠

Welcome to Day 3! Yesterday, we built our first chain. It worked, but we did something that professional AI engineers try to avoid: we used a simple string for our prompt. In a real-world app, prompts need to be dynamic, reusable, and structured. Today, we’re diving into Prompt Templates —the secret to making your AI reliable and scalable. 🛑 The Problem: Hardcoded Strings Imagine you’re building a travel assistant. If you write your prompt like this: "Tell me a 3-day itinerary for Paris" ...you