NLP
System Prompt
The hidden instructions that tell an AI how to behave, its personality, rules, role, and boundaries, before the user ever types anything.
Definition
A set of instructions provided to an LLM before user interaction that defines its behavior, role, tone, constraints, and capabilities. Acts as the agent's "constitution" that governs all interactions.
Why it matters
The most important and often most neglected part of any AI application, a bad system prompt makes everything worse.
Related terms in NLP
BERT
Google's breakthrough AI model that reads sentences in both directions at once to understand context better.
Chain of Thought (CoT)
Asking an AI to "show its work" and think step-by-step, which makes it much better at solving math and logic problems.
Context Window
The maximum amount of text an AI can read and consider at one time, like how many pages of notes it can hold in its head.
Conversational AI
AI that can have natural back-and-forth conversations with humans, chatbots, voice assistants, and customer service bots.
From vocabulary to outcomes
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