Clear History
Remove all messages while preserving session:import asyncio
from upsonic import Agent, Chat
async def main():
agent = Agent("anthropic/claude-sonnet-4-5")
chat = Chat(session_id="session1", user_id="user1", agent=agent)
await chat.invoke("Hello")
await chat.invoke("How are you?")
print(f"Messages before: {len(chat.all_messages)}")
chat.clear_history()
print(f"Messages after: {len(chat.all_messages)}")
if __name__ == "__main__":
asyncio.run(main())
Reset Session
Delete the entire session and start fresh:import asyncio
from upsonic import Agent, Chat
async def main():
agent = Agent("anthropic/claude-sonnet-4-5")
chat = Chat(session_id="session1", user_id="user1", agent=agent)
await chat.invoke("Hello")
chat.reset_session()
print("Session reset complete")
if __name__ == "__main__":
asyncio.run(main())
Delete a Message
Remove a specific message by index:import asyncio
from upsonic import Agent, Chat
async def main():
agent = Agent("anthropic/claude-sonnet-4-5")
chat = Chat(session_id="session1", user_id="user1", agent=agent)
await chat.invoke("Message one")
await chat.invoke("Message two")
print(f"Before: {len(chat.all_messages)} messages")
chat.delete_message(0)
print(f"After: {len(chat.all_messages)} messages")
if __name__ == "__main__":
asyncio.run(main())
Remove Attachment by Path
Remove attachments matching a path from all messages:import asyncio
from upsonic import Agent, Chat
async def main():
agent = Agent("anthropic/claude-sonnet-4-5")
chat = Chat(session_id="session1", user_id="user1", agent=agent)
await chat.invoke("Analyze", context=["doc.pdf", "image.png"])
removed = chat.remove_attachment_by_path("doc.pdf")
print(f"Removed {removed} attachments")
if __name__ == "__main__":
asyncio.run(main())