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Customize
System Prompt
DocumentationCloud API
Overview You can customize the system prompt by extending the
SystemPrompt Basic Customization Create a custom system prompt by inheriting from the base class. Copy
from browser_use import Agent, SystemPrompt class MySystemPrompt(SystemPrompt): def important_rules(self) -> str: # Get existing rules from parent class existing_rules = super().important_rules() # Add your custom rules new_rules = """ 9. MOST IMPORTANT RULE: - ALWAYS open first a new tab and go to wikipedia.com no matter the task!!! """ # Make sure to use this pattern otherwise the exiting rules will be lost return f'{existing_rules}\n{new_rules}'
Using Custom System Prompt Apply your custom system prompt when creating an agent: Copy
from langchain_openai import ChatOpenAI # Initialize the model model = ChatOpenAI(model='gpt-4o') # Create agent with custom system prompt agent = Agent( task="Your task here", llm=model, system_prompt_class=MySystemPrompt )
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