Flow.Launcher/Flow.Launcher.Core/Plugin/ExecutablePlugin.cs

using System.Diagnostics;
using System.IO;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;

namespace Flow.Launcher.Core.Plugin
{
    internal class ExecutablePlugin : JsonRPCPlugin
    {
        private readonly ProcessStartInfo _startInfo;

        public ExecutablePlugin(string filename)
        {
            _startInfo = new ProcessStartInfo
            {
                FileName = filename,
                UseShellExecute = false,
                CreateNoWindow = true,
                RedirectStandardOutput = true,
                RedirectStandardError = true
            };
            
            // required initialisation for below request calls 
            _startInfo.ArgumentList.Add(string.Empty);
        }

        protected override Task<Stream> RequestAsync(JsonRPCRequestModel request, CancellationToken token = default)
        {
            // since this is not static, request strings will build up in ArgumentList if index is not specified
            _startInfo.ArgumentList[0] = JsonSerializer.Serialize(request, RequestSerializeOption);
            return ExecuteAsync(_startInfo, token);
        }

        protected override string Request(JsonRPCRequestModel rpcRequest, CancellationToken token = default)
        {
            // since this is not static, request strings will build up in ArgumentList if index is not specified
            _startInfo.ArgumentList[0] = JsonSerializer.Serialize(rpcRequest, RequestSerializeOption);
            return Execute(_startInfo);
        }
    }
}