"""
Show how to use custom outputs.
@dev You need to add OPENAI_API_KEY to your environment variables.
"""
import asyncio
import os
import sys
sys.path.append(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
from dotenv import load_dotenv
load_dotenv()
import anyio
from browser_use import Agent
from browser_use.agent.views import AgentState
from browser_use.browser import BrowserProfile, BrowserSession
from browser_use.llm import ChatOpenAI
async def main():
task = 'Go to hackernews show hn and give me the first 5 posts'
browser_profile = BrowserProfile(
headless=True,
)
browser_session = BrowserSession(browser_profile=browser_profile)
agent_state = AgentState()
for i in range(10):
agent = Agent(
task=task,
llm=ChatOpenAI(model='gpt-4.1'),
browser_session=browser_session,
injected_agent_state=agent_state,
page_extraction_llm=ChatOpenAI(model='gpt-4.1-mini'),
)
done, valid = await agent.take_step()
print(f'Step {i}: Done: {done}, Valid: {valid}')
if done and valid:
break
# Save state to file
async with await anyio.open_file('agent_state.json', 'w') as f:
serialized = agent_state.model_dump_json(exclude={'history'})
await f.write(serialized)
# Load state back from file
async with await anyio.open_file('agent_state.json', 'r') as f:
loaded_json = await f.read()
agent_state = AgentState.model_validate_json(loaded_json)
break
if __name__ == '__main__':
asyncio.run(main())
