Reusable Prompt Templates
Somewhere between "type a fresh prompt every time" and "build a full internal prompt library," most people and teams land on the same practical habit: taking a prompt that worked well once and turning it into something they can use again and again, with just the details...
Prompt Versioning
Prompts start out as quick, one-off strings scattered through a codebase. Then a change to one "small tweak" quietly breaks a feature in production, nobody remembers what the prompt looked like last week, and there's no way to tell whether the new wording actually performed...
Context Engineering vs Prompt Engineering
As AI applications have grown more sophisticated — pulling in documents, memory, tool outputs, and conversation history rather than just a single well-crafted instruction — a new term has entered the vocabulary: context engineering. It's often used alongside, or even instead...
Preventing Prompt Injection
The last post in this series explained what prompt injection is and why it's structurally hard to fully solve. This one is the practical follow-up: if you're building an AI application — or just deploying one responsibly — what actually reduces the risk in practice? There's...
Prompt Injection Explained
Every technique covered in this series so far has been about getting an AI model to do what you want. Prompt injection flips that entirely — it's what happens when someone else's text, buried inside content the model is processing, hijacks the model into doing what they want...
How to Write Better AI Prompts
This series has covered a lot of ground — tokens, transformers, sampling parameters, chain-of-thought, structured output. But if you just want the practical takeaway — how do you actually write a better prompt, right now, without needing to think about attention mechanisms —...
Common Prompt Engineering Mistakes
Most disappointing AI outputs aren't the model's fault so much as the prompt's. After covering a whole toolkit of techniques throughout this series — roles, examples, structure, chain-of-thought, sampling controls — it's worth flipping the lens: what are the recurring...
Prompt Engineering for Developers
Prompt engineering looks different when you're building an application than when you're chatting casually with an AI. A developer isn't crafting one good prompt for one good answer — they're designing a prompt system that needs to work reliably across thousands or millions of...
Controlling LLM Responses
By now, this series has covered a lot of individual levers — temperature, top-p, system prompts, structured formatting, JSON output. "Controlling LLM responses" is really the umbrella topic tying all of that together: the full toolkit available for shaping what a language...
JSON Output from LLMs
Ask a language model a question in a chat app, and a flowing paragraph of text is exactly what you want. But ask that same model to power a piece of software — feeding its answer into a database, a UI component, or another system — and free-flowing prose becomes a liability …
Structured Prompting
Not every prompt has to be a flowing paragraph of natural language. Sometimes the most effective way to communicate with a language model is to organize your request into clear sections, labels, and formatting — almost like filling out a form rather than writing an essay....
Prompt Templates
If you've ever found yourself typing a similar prompt over and over — just swapping out a name, a topic, or a few details each time — you've already stumbled onto the core idea behind prompt templates. Instead of reinventing a well-crafted prompt from scratch every time, you...
System Prompts vs User Prompts
Every message you send to a chatbot is only part of the full picture. Behind the scenes, there's usually another layer of instructions — invisible to you — quietly shaping how the model behaves before your message even arrives. That hidden layer is the system prompt, and...
Role-Based Prompting
"You are an experienced divorce lawyer." "You are a patient, encouraging math tutor for a 10-year-old." "You are a skeptical peer reviewer examining this research paper." These short framing statements — assigning a language model a specific role or persona — can noticeably...
Chain-of-Thought Prompting
Ask an LLM a multi-step math problem and demand an immediate answer, and it might get it wrong — even if it "knows" all the individual facts needed to solve it. Ask the same question but add "think step by step," and accuracy often jumps dramatically. That gap is what...
Few-Shot Prompting Explained
Sometimes the clearest way to tell a model what you want isn't to explain it — it's to show it. That's the entire idea behind few-shot prompting: instead of describing a task in the abstract, you give the model a small number of worked examples directly in the prompt, and let …
Zero-Shot Prompting Explained
Not every prompt needs examples, instructions on tone, or a step-by-step breakdown to get a useful answer. Sometimes you can just ask a question directly — no setup, no demonstration — and the model still gets it right. That's zero-shot prompting, and it's one of the most...
What is Prompt Engineering?
Ask ChatGPT the same underlying question two different ways, and you can get wildly different quality answers. That gap — between a mediocre response and a genuinely useful one — is often just a matter of how the prompt was written. That skill has a name: prompt engineering....
Self-Attention in Transformers
Self-attention is the mechanism that made transformers possible — and by extension, made models like GPT and Claude possible. It's been touched on in a few earlier posts in this series, but it deserves its own deep dive, since it's genuinely the core computational idea the...
Attention Mechanism Explained Simply
"Attention" is the single most important idea behind modern AI language models — so important that the paper that introduced transformers was literally titled "Attention Is All You Need." But the term itself can feel abstract. What does it actually mean for a computer program...