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import logging
from langchain.agents import create_agent
from langchain_core.tools import BaseTool
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_mcp_adapters.sessions import StreamableHttpConnection
from langgraph.graph.state import CompiledStateGraph
from agents.lazy_agent import LazyLoadingAgent
from agents.middlewares import ConfigurableModelMiddleware
from core import get_model, settings
from agents.prompts.open_source import SYSTEM_PROMPT
logger = logging.getLogger(__name__)
class OpenSourceAgent(LazyLoadingAgent):
"""GitHub MCP Agent with async initialization for portfolio assistant."""
def __init__(self) -> None:
super().__init__()
self._mcp_tools: list[BaseTool] = []
self._mcp_client: MultiServerMCPClient | None = None
async def load(self) -> None:
"""Initialize the GitHub MCP agent by loading MCP tools."""
self._model = get_model(settings.DEFAULT_MODEL)
if not settings.GITHUB_PAT:
logger.info("GITHUB_PAT is not set, GitHub MCP agent will have no tools")
self._mcp_tools = []
self._graph = self._create_graph()
self._loaded = True
return
try:
# Initialize MCP client directly
github_pat = settings.GITHUB_PAT.get_secret_value()
connections = {
"github": StreamableHttpConnection(
transport="streamable_http",
url=settings.MCP_GITHUB_SERVER_URL,
headers={
"Authorization": f"Bearer {github_pat}",
},
)
}
self._mcp_client = MultiServerMCPClient(connections)
logger.info("MCP client initialized successfully")
self._mcp_tools = await self._mcp_client.get_tools()
except Exception as e:
logger.error(f"Failed to initialize GitHub MCP agent: {e}")
self._mcp_tools = []
self._mcp_client = None
# Create and store the graph
self._graph = self._create_graph()
self._loaded = True
def _create_graph(self) -> CompiledStateGraph:
"""Create the GitHub MCP agent graph."""
return create_agent(
model=self._model,
tools=self._mcp_tools,
middleware=[
ConfigurableModelMiddleware(),
],
name="open-source-agent",
system_prompt=SYSTEM_PROMPT,
debug=True,
)
# Create the agent instance
open_source_agent = OpenSourceAgent()
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