System Prompt
A high-priority instruction that sets the model's role, tone and constraints for the whole conversation.
/ quick answer
The system prompt sits above user turns and defines the agent's identity, capabilities and hard rules. Well-designed system prompts encode role, output format, refusal policy and available tools. A high-priority instruction that sets the model's role, tone and constraints for the whole conversation.
What is System Prompt?
The system prompt sits above user turns and defines the agent's identity, capabilities and hard rules. Well-designed system prompts encode role, output format, refusal policy and available tools.
What is an example of System Prompt?
'You are a senior finance analyst. Respond only in Markdown tables. Never quote figures older than 12 months. If unsure, say so.'.
Why does System Prompt matter for AI and automation?
A high-priority instruction that sets the model's role, tone and constraints for the whole conversation. It connects to the workflows, prompts and tool stacks linked on this page, so you can move from definition to execution without leaving Onexial.
/ continue exploring
Related concepts
The vocabulary this page depends on.
- →Prompt Chaining
Pipelining LLM calls where each step's output feeds the next.
- →Few-Shot Prompting
Showing the model 2–5 examples of the task inside the prompt so it mirrors the pattern.
- →Prompt Template
A reusable prompt with named variables filled at runtime.
- →Chain-of-Thought Prompting
Instructing a model to think step by step before answering.
Related workflows
Turn this into a repeatable process.
- →Build an Internal Knowledge Bot
Ship a Slack bot that answers questions from your company docs.
- →How to Build an AI Content System
A repeatable pipeline that turns one input into publish-ready content across every channel.
Related prompts
Reusable prompts for this job.
- →Tool Calling Specification Prompt
Design safe tool schemas before connecting an AI model to real actions.
- →Prompt Improver Prompt
Iterate a weak prompt into a strong one using best practices.
- →JSON Extractor Prompt
Extract structured JSON from any unstructured text.
- →AI System Threat Model Prompt
Produces a concrete threat model for an AI system with tool access.