Techniques & Methods
System Prompt
A system prompt is a set of instructions provided to an LLM before the conversation begins, typically by the application developer rather than the end user. It defines the model's persona, constraints, output format, and task context—for example, "You are a helpful customer service agent for Acme Corp."
System prompts are a primary tool for customizing LLM behavior in production applications. They can be used to restrict topics, enforce tone, inject context, and shape how the model handles user queries.
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Related Terms
Techniques & Methods
Prompt
Text input provided to an AI model to guide the content and format of its response.
Techniques & Methods
Prompt Engineering
The discipline of designing input text — instructions, examples, constraints, and context — to reliably steer a language model toward accurate, well-formatted, and intent-aligned outputs without modifying model weights.
Miscellaneous
System Message
Predefined instruction provided to an AI model before the conversation that guides its behavior.
Techniques & Methods
Fine-Tuning
Continuing the training of a pre-trained foundation model on a smaller, curated dataset to specialize its behavior, style, or domain expertise without losing its general capabilities.