forked from phoenix-oss/llama-stack-mirror
83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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from typing import Any, AsyncGenerator, List
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from llama_models.llama3.api.datatypes import StopReason, ToolResponseMessage
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from llama_toolchain.agentic_system.api import (
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AgenticSystem,
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AgenticSystemTurnCreateRequest,
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AgenticSystemTurnResponseEventType as EventType,
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)
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from llama_toolchain.inference.api import Message
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async def execute_with_custom_tools(
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system: AgenticSystem,
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system_id: str,
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session_id: str,
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messages: List[Message],
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custom_tools: List[Any],
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max_iters: int = 5,
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stream: bool = True,
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) -> AsyncGenerator:
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# first create a session, or do you keep a persistent session?
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tools_dict = {t.get_name(): t for t in custom_tools}
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current_messages = messages.copy()
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n_iter = 0
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while n_iter < max_iters:
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n_iter += 1
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request = AgenticSystemTurnCreateRequest(
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system_id=system_id,
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session_id=session_id,
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messages=current_messages,
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stream=stream,
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)
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turn = None
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async for chunk in system.create_agentic_system_turn(request):
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if chunk.event.payload.event_type != EventType.turn_complete.value:
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yield chunk
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else:
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turn = chunk.event.payload.turn
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message = turn.output_message
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if len(message.tool_calls) == 0:
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yield chunk
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return
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if message.stop_reason == StopReason.out_of_tokens:
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yield chunk
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return
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tool_call = message.tool_calls[0]
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if tool_call.tool_name not in tools_dict:
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m = ToolResponseMessage(
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call_id=tool_call.call_id,
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tool_name=tool_call.tool_name,
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content=f"Unknown tool `{tool_call.tool_name}` was called. Try again with something else",
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)
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next_message = m
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else:
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tool = tools_dict[tool_call.tool_name]
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result_messages = await execute_custom_tool(tool, message)
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next_message = result_messages[0]
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yield next_message
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current_messages = [next_message]
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async def execute_custom_tool(tool: Any, message: Message) -> List[Message]:
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result_messages = await tool.run([message])
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assert (
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len(result_messages) == 1
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), f"Expected single message, got {len(result_messages)}"
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return result_messages
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