import sys
import os
import logging
# ============================================================================
# CRITICAL FIX: Completely disable ALL stderr output for MCP stdio transport
# ============================================================================
# MCP uses stdin/stdout for JSON-RPC communication. FastMCP library logs to
# stderr which corrupts the stream and causes BrokenResourceError.
# We must suppress stderr PERMANENTLY for the entire server lifetime.
# ============================================================================
# Redirect stderr to devnull PERMANENTLY
_devnull = open(os.devnull, 'w', encoding='utf-8')
sys.stderr = _devnull
# Also disable Python logging completely
logging.disable(logging.CRITICAL)
# Disable FastMCP logging if it has any
os.environ['PYTHONUNBUFFERED'] = '0'
# Disable exception traceback printing completely
# This prevents uncaught exceptions from printing to stderr
def silent_excepthook(_exc_type, _exc_value, _exc_traceback):
"""Silent exception hook - suppresses all exception output"""
return # Do nothing - no stderr output
sys.excepthook = silent_excepthook
# Also set threading excepthook for background threads (Python 3.8+)
import threading
def silent_threading_excepthook(_args):
"""Silent threading exception hook"""
return # Do nothing
# Only set if available (Python 3.8+)
if hasattr(threading, 'excepthook'):
threading.excepthook = silent_threading_excepthook
# ============================================================================
# Now import everything - no logs will appear
# ============================================================================
from mcp.server.fastmcp import FastMCP
from ai_interaction_tool.core import ai_interaction_tool, get_tool_description
# Tạo MCP server
mcp = FastMCP("AI Interaction")
mcp.add_tool(ai_interaction_tool, description=get_tool_description())
if __name__ == "__main__":
# Chạy server với transport=stdio
# stderr remains suppressed throughout entire runtime
mcp.run(transport="stdio")
