Program.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using ModelContextProtocol.Server;
using Serilog;

namespace ThinkMCP;

/// <summary>
/// ThinkMCP Server - A Model Context Protocol server providing the 'think' tool
/// for model reasoning and thought logging.
/// </summary>
public class Program
{
 public static async Task Main(string[] args)
 {
 // Set up logging directory
 var logDirectory = Path.Combine(Path.GetTempPath(), "mcp", "think");
 Directory.CreateDirectory(logDirectory);
 var logFileName = Path.Combine(logDirectory, $"think-mcp-{DateTime.Now:yyyyMMdd-HHmmss}.log");
 
 // Configure Serilog
 Log.Logger = new LoggerConfiguration()
 .MinimumLevel.Information()
 .WriteTo.Console(outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj}{NewLine}{Exception}")
 .WriteTo.File(logFileName, 
 outputTemplate: "[{Timestamp:yyyy-MM-dd HH:mm:ss} {Level:u3}] {Message:lj}{NewLine}{Exception}")
 .CreateLogger();

 var builder = Host.CreateApplicationBuilder(args);
 
 // Configure logging to stderr (as recommended by MCP SDK)
 builder.Logging.ClearProviders();
 builder.Logging.AddConsole(options =>
 {
 // All logs go to stderr so they appear in the MCP client
 options.LogToStandardErrorThreshold = LogLevel.Trace;
 });
 
 // Add Serilog
 builder.Services.AddSerilog();
 
 // Configure MCP Server
 builder.Services
 .AddMcpServer()
 .WithStdioServerTransport()
 .WithToolsFromAssembly(); // This will discover our ThinkTool automatically
 
 var host = builder.Build();
 
 // Log server startup
 var logger = host.Services.GetRequiredService<ILogger<Program>>();
 logger.LogInformation("ThinkMCP Server starting up...");
 logger.LogInformation("Thought logs will be stored in: {LogPath}", logFileName);
 
 try
 {
 await host.RunAsync();
 }
 finally
 {
 Log.CloseAndFlush();
 }
 }
}