feat: Introduce `MCPClient` for multi-server MCP communication with mock support, update `gradio` dependency, and add logging verification scripts.

repro_logging.py

@@ -0,0 +1,15 @@
+import logging
+
+# Simulate main.py
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+
+# Simulate mcp_client.py behavior
+logger = logging.getLogger("mcp_client")
+if not logger.handlers:
+    handler = logging.StreamHandler()
+    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+    logger.setLevel(logging.INFO)
+
+logger.info("This should be printed twice if bug exists.")

src/credentialwatch_agent/mcp_client.py

@@ -23,12 +23,6 @@ class MCPClient:
         
         # Configure logger
         self.logger = logging.getLogger("mcp_client")
-        if not self.logger.handlers:
-            handler = logging.StreamHandler()
-            formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
-            handler.setFormatter(formatter)
-            self.logger.addHandler(handler)
-            self.logger.setLevel(logging.INFO)
 
     async def connect(self):
         """Establishes connections to all MCP servers."""

uv.lock

@@ -350,7 +350,7 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
-    { name = "gradio", extras = ["mcp"], specifier = ">=5.0.0" },
+    { name = "gradio", extras = ["mcp"], specifier = ">=6.0.1" },
     { name = "httpx", specifier = ">=0.25.0" },
     { name = "langchain-mcp-adapters", specifier = ">=0.0.1" },
     { name = "langchain-openai", specifier = ">=0.0.5" },

verify_fix.py

@@ -0,0 +1,16 @@
+import logging
+import sys
+import os
+
+# Add src to path so we can import credentialwatch_agent
+sys.path.append(os.path.join(os.getcwd(), "src"))
+
+from credentialwatch_agent.mcp_client import mcp_client
+
+# Configure root logger as main.py does
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+
+# Log something via mcp_client
+print("--- START LOG TEST ---")
+mcp_client.logger.info("This should appear exactly ONCE.")
+print("--- END LOG TEST ---")