Overview
You can customize the system prompt in two ways:
- Extend the default system prompt with additional instructions
- Override the default system prompt entirely
Custom system prompts allow you to modify the agent's behavior at a
fundamental level. Use this feature carefully as it can significantly impact
the agent's performance and reliability.
Extend System Prompt (recommended)
To add additional instructions to the default system prompt:
const extendSystemMessage = `
REMEMBER the most important RULE:
ALWAYS open first a new tab and go first to url wikipedia.com no matter the task!!!
`;
Override System Prompt
Not recommended! If you must override the [default system
prompt](https://github.com/leoning60/browsernode/blob/main/src/agent/system_prompt.md),
make sure to test the agent yourself.
Anyway, to override the default system prompt:
import { Agent } from "browsernode";
import { ChatOpenAI } from "browsernode/llm";
const overrideSystemMessage = `
You are an AI agent that helps users with web browsing tasks.
[Your complete custom instructions here...]
`;
// Create agent with custom system prompt
const agent = new Agent(
{
task: "Your task here",
llm: llm,
overrideSystemMessage: overrideSystemMessage,
}
);
Extend Planner System Prompt
You can customize the behavior of the planning agent by extending its system prompt:
const extendPlannerSystemMessage = `
PRIORITIZE gathering information before taking any action.
Always suggest exploring multiple options before making a decision.
`;
// Create agent with extended planner system prompt
const llm = new ChatOpenAI(model: "gpt-4o");
const plannerLLM = new ChatOpenAI(model: "gpt-4o-mini");
const agent = new Agent(
{
task: "Your task here",
llm: llm,
plannerLLM: plannerLLM,
extendPlannerSystemMessage: extendPlannerSystemMessage,
}
);