Topic
Hands-on coverage of the tools: what they do, what they cost, and where they actually fit.
A system prompt is the hidden block of instructions that sets a model's role and rules before you type a word. Here is what it is, how it differs from your prompt, why it is not a secret or a security control, and how it connects to prompt engineering and prompt injection.
A vector database stores embeddings, the numerical fingerprints AI models make for text and images, and finds the ones closest in meaning to a query. That nearest-neighbour search is what powers semantic search and RAG. Here is what it does, and when a library or a Postgres extension will do the same job.
A context window is how much an AI model can hold in mind for a single request, and its size is now a headline selling point. Flagship models have reached about a million tokens. But research on 'lost in the middle' and 'context rot' shows a bigger window does not mean the model reliably uses all of it.
Fine-tuning is one of the most misunderstood levers in AI. It changes how a model behaves, its format, tone and consistency, not what it knows. Here is what fine-tuning actually does, how the cheap version called LoRA works, and the rule for when to fine-tune instead of reaching for retrieval or a longer prompt.
Everyone has an opinion on prompt engineering, few can define it. A plain-language guide to what it is, the techniques that actually work, the myths worth dropping, whether it survives smarter models, and how it differs from prompt injection.
Ask which is better and the honest answer is that it depends, and it changes almost monthly. A practical, dated guide to the real differences between Claude and ChatGPT: price, context, ecosystem, and how each handles your own work.
Every chatbot vendor now promises it can read your documents. Retrieval-augmented generation is the plumbing that makes that work: a plain-language look at what it does well, where it breaks, and when a bigger context window or fine-tuning is the better tool.
At Connect 2026, Zuckerberg unveiled Muse Charm, a Tamagotchi-sized device for Meta's Muse AI agent that he says ships 'in time for the holidays.' Meta's own page is vague, the specs come from reporters, and an always-on camera on your keys is the real story.