Add dev scripts for mitmproxy debugging and fix JSON-RPC error responses

dev-with-mitm.sh

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+#!/bin/bash
+# Easy script to run MCP server with mitmproxy intercepting client traffic
+
+echo "🚀 Starting MCP server with mitmproxy..."
+echo ""
+echo "This will:"
+echo "  1. Start your MCP server on port 3232"
+echo "  2. Start mitmproxy reverse proxy on port 8080"
+echo "  3. Intercept all client → server traffic"
+echo ""
+echo "📡 Connect your MCP client to: http://localhost:8080/mcp"
+echo "🔍 View traffic in mitmproxy TUI"
+echo ""
+echo "Press Ctrl+C to stop both processes"
+echo ""
+
+# Trap Ctrl+C to kill both processes
+trap 'kill 0' EXIT
+
+# Start the MCP server in background
+npm run dev &
+SERVER_PID=$!
+
+# Give server time to start
+sleep 3
+
+# Start mitmproxy in reverse proxy mode (foreground so we see the TUI)
+mitmproxy --mode reverse:http://localhost:3232 --listen-port 8080
+
+# This line won't be reached until mitmproxy exits
+wait

dev-with-mitmweb.sh

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+#!/bin/bash
+# Easy script to run MCP server with mitmproxy web interface
+
+echo "🚀 Starting MCP server with mitmproxy web UI..."
+echo ""
+echo "This will:"
+echo "  1. Start your MCP server on port 3232"
+echo "  2. Start mitmproxy with web UI on port 8081"
+echo "  3. Proxy client traffic through port 8080"
+echo ""
+echo "📡 Connect your MCP client to: http://localhost:8080/mcp"
+echo "🌐 View traffic in browser at: http://localhost:8081"
+echo ""
+echo "Press Ctrl+C to stop both processes"
+echo ""
+
+# Trap Ctrl+C to kill both processes
+trap 'kill 0' EXIT
+
+# Start the MCP server in background
+npm run dev &
+SERVER_PID=$!
+
+# Give server time to start
+sleep 3
+
+# Start mitmweb in reverse proxy mode
+mitmweb --mode reverse:http://localhost:3232 --listen-port 8080 --web-port 8081
+
+# This line won't be reached until mitmweb exits
+wait