diff --git a/CMakeLists.txt b/CMakeLists.txt
index ae92603..b0cd922 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ file(GLOB_RECURSE SOURCES_FILES src/*)
 
 add_executable(clippy_terminal ${SOURCES_FILES})
 target_include_directories(clippy_terminal PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
-target_link_libraries(clippy_terminal cppshell rang)
+target_link_libraries(clippy_terminal PRIVATE cppshell tmuxub rang jsoncons yaml-cpp)
 
 install(TARGETS clippy_terminal DESTINATION bin)
 
@@ -20,9 +20,31 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(cppshell)
 
+FetchContent_Declare(
+  tmuxub
+  GIT_REPOSITORY https://gitlab.com/Onyad/tmuxub
+  GIT_TAG        origin/main
+)
+FetchContent_MakeAvailable(tmuxub)
+
 FetchContent_Declare(
   rang
   GIT_REPOSITORY https://github.com/agauniyal/rang.git
   GIT_TAG        origin/master
 )
 FetchContent_MakeAvailable(rang)
+
+set(JSONCONS_BUILD_TESTS OFF CACHE INTERNAL "Turn off tests")
+FetchContent_Declare(
+  jsoncons
+  GIT_REPOSITORY https://github.com/danielaparker/jsoncons
+  GIT_TAG        origin/master
+)
+FetchContent_MakeAvailable(jsoncons)
+
+FetchContent_Declare(
+  yaml-cpp
+  GIT_REPOSITORY https://github.com/jbeder/yaml-cpp.git
+  GIT_TAG        origin/master
+)
+FetchContent_MakeAvailable(yaml-cpp)
diff --git a/src/clippy/clippy.cpp b/src/clippy/clippy.cpp
index 1b9d064..b1c8b94 100644
--- a/src/clippy/clippy.cpp
+++ b/src/clippy/clippy.cpp
@@ -25,15 +25,13 @@ void Clippy::Run(const std::vector<std::string>& args) {
   for (size_t i = 1; i < args.size(); ++i) {
     std::cout << args[i] << (i + 1 == args.size() ? "" : ",") << " ";
   }
-  std::cout << "}" << std::endl << rang::bg::reset << rang::style::reset;
+  std::cout << "}" << rang::bg::reset << rang::style::reset << std::endl;
 }
 
-Clippy::TargetPtr Clippy::TryExecuteClippyCommand(
-    const std::vector<std::string>& args) {
+Clippy::TargetPtr Clippy::TryExecuteClippyCommand(const std::vector<std::string>& args) {
   using namespace utils::parametres;
   using namespace clippy::targets;
-  if (CheckPatternParametres(args, Parameter::Skip, "help",
-                             Parameter::Anything)) {
+  if (CheckPatternParametres(args, Parameter::Skip, "help", Parameter::Anything)) {
     std::cout << "Hello I'm clippy" << std::endl;
     std::cout << "Parametres: { ";
     for (size_t i = 0; i < args.size(); ++i) {
@@ -41,11 +39,12 @@ Clippy::TargetPtr Clippy::TryExecuteClippyCommand(
     }
     std::cout << "}" << std::endl;
 
+    std::cout << "You can use:\n  cfg\n  crt\n  prj\n  list\n  setname\n  loadcfg\n  op" << std::endl;
+
     return std::make_unique<EmptyTarget>();
   }
 
-  if (CheckPatternParametres(args, Parameter::Skip, "cfg",
-                             Parameter::Anything)) {
+  if (CheckPatternParametres(args, Parameter::Skip, "cfg", Parameter::Anything)) {
     LoadProjects();
     auto p = projects_->GetCurrentProject();
 
@@ -56,17 +55,44 @@ Clippy::TargetPtr Clippy::TryExecuteClippyCommand(
     }
   }
 
-  if (CheckPatternParametres(args, Parameter::Skip, "crt",
-                             Parameter::Anything)) {
+  if (CheckPatternParametres(args, Parameter::Skip, "crt", Parameter::Anything)) {
     LoadProjects();
     return std::make_unique<CreateProjectConfig>(projects_.value());
   }
 
+  if (CheckPatternParametres(args, Parameter::Skip, "prj", Parameter::Anything)) {
+    // TODO description current project or project by name
+    return nullptr;
+  }
+
+  if (CheckPatternParametres(args, Parameter::Skip, "list", Parameter::Nothing)) {
+    LoadProjects();
+
+    return std::make_unique<PrintListProjects>(projects_.value());
+  }
+
+  if (CheckPatternParametres(args, Parameter::Skip, "setname", Parameter::Anything)) {
+    LoadProjects();
+
+    return std::make_unique<SetNameProject>(projects_.value(), args[2]);
+  }
+
+  if (CheckPatternParametres(args, Parameter::Skip, "loadcfg", Parameter::Nothing)) {
+    LoadProjects();
+
+    return std::make_unique<OpenLoadConfig>(projects_.value());
+  }
+
+  if (CheckPatternParametres(args, Parameter::Skip, "op", Parameter::Anything)) {
+    LoadProjects();
+
+    return std::make_unique<OpenProject>(projects_.value(), args[2]);
+  }
+
   return nullptr;
 }
 
-Clippy::TargetPtr Clippy::GetScriptTarget(
-    const std::vector<std::string>& args) {
+Clippy::TargetPtr Clippy::GetScriptTarget(const std::vector<std::string>& args) {
   LoadProjects();
   auto p = projects_->GetCurrentProject();
 
diff --git a/src/clippy/config.cpp b/src/clippy/config.cpp
index 1940174..e7499e8 100644
--- a/src/clippy/config.cpp
+++ b/src/clippy/config.cpp
@@ -25,11 +25,13 @@ std::unique_ptr<clippy::targets::RunShellScript> Config::GetTarget(
   std::vector<std::string> target_commands;
   target_commands.emplace_back("cd " + initial_directory_);
 
-  bool target_begin = false;
+  bool target_exists = false;
+  bool in_target = false;
 
   while (std::getline(in, current)) {
     if (current == target + ":") {
-      target_begin = true;
+      target_exists = true;
+      in_target = true;
       continue;
     }
 
@@ -37,18 +39,18 @@ std::unique_ptr<clippy::targets::RunShellScript> Config::GetTarget(
       continue;
     }
 
-    if (!std::isspace(current[0]) && target_begin) {
-      target_begin = false;
+    if (!std::isspace(current[0])) {
+      in_target = false;
     }
 
-    if (target_begin) {
+    if (in_target) {
       target_commands.emplace_back(Strip(std::move(current)));
     } else if (current[0] == '!') {
       target_commands.emplace_back(current.substr(1, current.size() - 1));
     }
   }
 
-  if (!target_begin) {
+  if (!target_exists) {
     return nullptr;
   }
 
diff --git a/src/clippy/project_list.cpp b/src/clippy/project_list.cpp
index e2ad9f3..cf4aa2e 100644
--- a/src/clippy/project_list.cpp
+++ b/src/clippy/project_list.cpp
@@ -1,75 +1,45 @@
 #include <clippy/project_list.hpp>
 #include <filesystem>
+#include <optional>
+#include <sstream>
 #include <utils/lock_file.hpp>
+#include <utils/filesystem.hpp>
 
 #include <fstream>
 #include <mutex>
 #include <random>
 #include <chrono>
 
-Config ProjectList::GetNewConfig(
-    const std::filesystem::path& config_directory) {
+#include <utils/filesystem.hpp>
+
+#include <jsoncons/json.hpp>
+#include <jsoncons_ext/cbor/cbor.hpp>
+#include "yaml-cpp/node/parse.h"
+
+#include <yaml-cpp/yaml.h>
+
+Config ProjectList::GetNewConfig(const std::filesystem::path& config_directory) {
   std::lock_guard guard(lock_file_);
 
-  LoadWithouLock();
+  LoadWithoutLock();
 
-  std::mt19937 rnd(std::chrono::system_clock::now().time_since_epoch().count());
-
-  auto RandomSymbol = [&rnd]() {
-    int n = rnd() % (26 + 26 + 10);
-    if (n < 26) {
-      return 'a' + n;
-    } else if (n < 26 + 26) {
-      return 'A' + n - 26;
-    } else {
-      return '0' + n - 26 - 26;
-    }
-  };
-
-  auto GenerateFilename = [&rnd, &RandomSymbol]() {
-    std::string filename;
-    for (size_t i = 0; i < 6; ++i) {
-      filename += RandomSymbol();
-    }
-
-    return filename;
-  };
-
-  auto filename = GenerateFilename();
-  while (true) {
-    bool exist_config = false;
-    for (auto& project : projects_) {
-      if (filename == project.configuration_file.filename()) {
-        exist_config = true;
-        break;
-      }
-    }
-    if (!exist_config) {
-      break;
-    }
-
-    filename = GenerateFilename();
-  }
-
-  auto path_to_config = config_directory / filename;
-
-  std::ofstream out(path_, std::ios::app);
-  out << std::filesystem::current_path() << " " << path_to_config << std::endl;
-  out.close();
+  auto path_to_config = utils::filesystem::GenerateFile(config_directory);
 
   projects_.emplace_back(std::filesystem::current_path(), path_to_config);
 
+  SaveConfig();
+
   return {path_to_config, std::filesystem::current_path()};
 }
 
 void ProjectList::Load() {
   std::lock_guard guard(lock_file_);
 
-  LoadWithouLock();
+  LoadWithoutLock();
 }
 
-void ProjectList::LoadWithouLock() {
-  std::ifstream in(path_);
+void ProjectList::OldLoadConfig(const std::string& data) {
+  std::stringstream in(data);
 
   Project current;
 
@@ -78,15 +48,147 @@ void ProjectList::LoadWithouLock() {
   }
 }
 
-std::optional<Project> ProjectList::GetCurrentProject() {
+template <typename U, typename T>
+void UpdateField(jsoncons::json& data, const std::string& field, std::optional<T> member) {
+  if (member) {
+    data[field] = static_cast<U>(member.value());
+  }
+}
+
+template <typename U, typename T>
+void UpdateField(YAML::Node& data, const std::string& field, std::optional<T> member) {
+  if (member) {
+    data[field] = static_cast<U>(member.value());
+  }
+}
+
+void ProjectList::SaveConfig(tag_json) {
+  jsoncons::json result;
+
+  result["version"] = "0.1";
+  result["projects"] = std::vector<std::string>();
+
+  for (auto& project : projects_) {
+    jsoncons::json current;
+    current["path_to_config"] = std::string(project.configuration_file);
+    current["path_root_project"] = std::string(project.root_project);
+
+    UpdateField<std::string>(current, "name", project.name);
+    UpdateField<std::string>(current, "open_script", project.open_script);
+
+    result["projects"].emplace_back(current);
+  }
+
+  std::ofstream out(path_);
+  out << result.to_string();
+}
+
+void ProjectList::SaveConfig() {
+  YAML::Node result;
+  result["version"] = "0.2";
+
+  for (auto& project : projects_) {
+    YAML::Node current;
+
+    UpdateField<std::string>(current, "name", project.name);
+    current["path_root_project"] = std::string(project.root_project);
+    current["path_to_config"] = std::string(project.configuration_file);
+    UpdateField<std::string>(current, "open_script", project.open_script);
+
+    result["projects"].push_back(current);
+  }
+
+  std::ofstream out(path_);
+  out << result;
+}
+
+template <typename T>
+std::optional<T> GetOptionalField(const jsoncons::json& data, std::string field) {
+  return data.contains(field) ? std::make_optional(data[field].as<std::string>()) : std::nullopt;
+}
+
+template <typename T>
+std::optional<T> GetOptionalField(const YAML::Node& data, std::string field) {
+  return data[field].IsDefined() ? std::make_optional(data[field].as<std::string>()) : std::nullopt;
+}
+
+void ProjectList::LoadConfig(const YAML::Node& data) {
+  if (data["version"].as<std::string>() != "0.2") {
+    throw std::logic_error("unsupport version");
+  }
+
+  Project current;
+  for (const auto& project : data["projects"]) {
+    current.configuration_file = project["path_to_config"].as<std::string>();
+    current.root_project = project["path_root_project"].as<std::string>();
+
+    current.name = GetOptionalField<std::string>(project, "name");
+    current.open_script = GetOptionalField<std::string>(project, "open_script");
+
+    projects_.emplace_back(current);
+  }
+}
+
+void ProjectList::LoadConfig(const jsoncons::json& data) {
+  if (data["version"] != "0.1") {
+    throw std::logic_error("unsupported version config");
+  }
+
+  Project current;
+  for (auto& project : data["projects"].array_range()) {
+    current.configuration_file = project["path_to_config"].as<std::string>();
+    current.root_project = project["path_root_project"].as<std::string>();
+
+    current.name = GetOptionalField<std::string>(project, "name");
+    current.open_script = GetOptionalField<std::string>(project, "open_script");
+
+    projects_.emplace_back(current);
+  }
+}
+
+void ProjectList::LoadWithoutLock() {
+  projects_.clear();
+
+  try {
+    LoadConfig(YAML::LoadFile(path_));
+  } catch (...) {
+    auto data = utils::filesystem::LoadFile(path_);
+
+    std::cout << "I can't parse yaml. Try read json?" << std::endl;
+
+    std::string result;
+    std::getline(std::cin, result);
+
+    if (result == "y") {
+      try {
+        LoadConfig(jsoncons::json::parse(data));
+      } catch (...) {
+        std::cout << "I can't read project lists. Try fix it?" << std::endl;
+
+        std::string result;
+        std::getline(std::cin, result);
+
+        if (result == "y") {
+          OldLoadConfig(data);
+          SaveConfig();
+        }
+      }
+      SaveConfig();
+    }
+  }
+}
+
+Project* ProjectList::GetCurrentProject_() {
   auto current_path = std::filesystem::current_path();
 
-  std::optional<Project> result;
-  auto UpdateResult = [&result](Project p) {
-    if (!result.has_value()) {
-      result = p;
+  Project* result = nullptr;
+  auto UpdateResult = [&result](Project& p) {
+    if (!result) {
+      result = &p;
     } else {
-      result = std::max(p, result.value());
+      if (*result < p) {
+        result = &p;
+      }
     }
   };
 
@@ -108,3 +210,16 @@ std::optional<Project> ProjectList::GetCurrentProject() {
 
   return result;
 }
+
+Project* ProjectList::GetProjectByName_(const std::string& name) {
+  Project* result = nullptr;
+  for (auto& project : projects_) {
+    if (!project.name) {
+      continue;
+    }
+    if (project.name == name) {
+      result = &project;
+    }
+  }
+  return result;
+}
diff --git a/src/clippy/project_list.hpp b/src/clippy/project_list.hpp
index 5cefefe..fe1ba71 100644
--- a/src/clippy/project_list.hpp
+++ b/src/clippy/project_list.hpp
@@ -1,12 +1,20 @@
 #pragma once
 #include <clippy/config.hpp>
 
+#include <mutex>
+#include <stdexcept>
 #include <utils/lock_file.hpp>
 
 #include <vector>
 #include <filesystem>
 #include <optional>
 
+#include <jsoncons/json.hpp>
+#include <yaml-cpp/yaml.h>
+#include "utils/config_path.hpp"
+#include "utils/editor.hpp"
+#include "utils/filesystem.hpp"
+
 struct Project {
   Project() {}
 
@@ -15,10 +23,14 @@ struct Project {
 
   std::strong_ordering operator<=>(const Project&) const = default;
 
-  Config GetConfig() { return Config{configuration_file, root_project}; }
+  Config GetConfig() {
+    return Config{configuration_file, root_project};
+  }
 
   std::filesystem::path root_project;
   std::filesystem::path configuration_file;
+  std::optional<std::string> name;
+  std::optional<std::filesystem::path> open_script;
 };
 
 class ProjectList {
@@ -29,13 +41,72 @@ class ProjectList {
 
   Config GetNewConfig(const std::filesystem::path& config_directory);
 
-  const std::vector<Project>& GetProjects() const { return projects_; }
+  const std::vector<Project>& GetProjects() const {
+    return projects_;
+  }
 
-  std::optional<Project> GetCurrentProject();
+  std::optional<Project> GetCurrentProject() {
+    auto* p = GetCurrentProject_();
+    if (p) {
+      return *p;
+    } else {
+      return std::nullopt;
+    }
+  }
+
+  void SetNameCurrentProject(const std::string& name) {
+    auto* p = GetCurrentProject_();
+    if (p) {
+      p->name = name;
+      SaveConfig();
+    } else {
+      throw std::logic_error("Not exists current project");
+    }
+  }
+
+  std::filesystem::path GetCurrentLoadConfig() {
+    auto* p = GetCurrentProject_();
+    if (p) {
+      if (p->open_script) {
+        return p->open_script.value();
+      } else {
+        auto scripts_path = utils::GetProjectDirectory() / "scripts";
+        {
+          std::lock_guard lock(lock_file_);
+          p->open_script = utils::filesystem::GenerateFile(scripts_path);
+          SaveConfig();
+        }
+        return p->open_script.value();
+      }
+    } else {
+      throw std::logic_error("Not exists current project");
+    }
+  }
+
+  std::optional<Project> GetProjectByName(const std::string& name) {
+    auto* p = GetProjectByName_(name);
+    if (p) {
+      return *p;
+    } else {
+      return std::nullopt;
+    }
+  }
 
  private:
+  Project* GetCurrentProject_();
+  Project* GetProjectByName_(const std::string&);
+
+  void OldLoadConfig(const std::string&);
+
+  struct tag_json {};
+  void SaveConfig(tag_json);
+
+  void SaveConfig();
+
   void Load();
-  void LoadWithouLock();
+  void LoadConfig(const jsoncons::json&);
+  void LoadConfig(const YAML::Node&);
+  void LoadWithoutLock();
 
  private:
   std::filesystem::path path_;
diff --git a/src/clippy/target.hpp b/src/clippy/target.hpp
index 48fab11..d2f9b7e 100644
--- a/src/clippy/target.hpp
+++ b/src/clippy/target.hpp
@@ -11,8 +11,12 @@
 #include <rang.hpp>
 
 #include <iostream>
+#include <deque>
 #include <ranges>
 #include <functional>
+#include "utils/filesystem.hpp"
+
+#include <tmuxub/tmuxub.hpp>
 
 namespace clippy::targets {
 class Target {
@@ -31,7 +35,9 @@ class OpenProjectConfig : public Target {
  public:
   OpenProjectConfig(Config config) : config_(config) {}
 
-  void Execute() override { config_.Edit(); }
+  void Execute() override {
+    config_.Edit();
+  }
   ~OpenProjectConfig() override {}
 
  private:
@@ -58,7 +64,8 @@ class CreateProjectConfig : public Target {
 class RunShellScript : public Target {
  public:
   template <template <typename, typename...> class C, typename... Params>
-  RunShellScript(const C<std::string, Params...>& commands) : commands_(commands.begin(), commands.end()) {}
+  RunShellScript(const C<std::string, Params...>& commands)
+      : commands_(commands.begin(), commands.end()) {}
 
   void PushBack(const std::string& command) {
     commands_.push_back(command);
@@ -75,16 +82,15 @@ class RunShellScript : public Target {
     cppshell::Shell s("bash", tmp_path);
 
     for (auto& command : commands_) {
-      std::cout << rang::fg::green << rang::style::bold << rang::bgB::blue << "->" << rang::fg::reset
-                << rang::bg::reset << " " << command << rang::style::reset << std::endl;
+      std::cout << rang::fg::green << rang::style::bold << rang::bgB::blue << "->"
+                << rang::fg::reset << rang::bg::reset << " " << command << rang::style::reset
+                << std::endl;
       s.Execute(command);
       if (int err = s.GetExitCodeLastCommand(); err != 0) {
-        std::cout << rang::fg::red << rang::style::bold
-                  << "Command exit with code " << err << rang::fg::reset
-                  << rang::style::reset << std::endl;
-        std::cout << rang::fg::blue << rang::style::bold
-                  << "Continue execution? [Y/n] " << rang::fg::reset
-                  << rang::style::reset;
+        std::cout << rang::fg::red << rang::style::bold << "Command exit with code " << err
+                  << rang::fg::reset << rang::style::reset << std::endl;
+        std::cout << rang::fg::blue << rang::style::bold << "Continue execution? [Y/n] "
+                  << rang::fg::reset << rang::style::reset;
 
         std::string result;
         std::getline(std::cin, result);
@@ -102,4 +108,72 @@ class RunShellScript : public Target {
  private:
   std::deque<std::string> commands_;
 };
+
+class PrintListProjects : public Target {
+ public:
+  PrintListProjects(ProjectList& projects) : projects_(projects) {}
+
+  void Execute() override {
+    for (auto& project : projects_.GetProjects()) {
+      std::cout << std::setw(10) << project.name.value_or("-") << " " << std::setw(50)
+                << project.root_project << " " << std::setw(70) << project.configuration_file
+                << std::setw(70) << project.open_script.value_or("-") << std::endl;
+    }
+  }
+
+ private:
+  ProjectList& projects_;
+};
+
+class SetNameProject : public Target {
+ public:
+  SetNameProject(ProjectList& projects, std::string new_name)
+      : projects_(projects), new_name_(std::move(new_name)) {}
+
+  void Execute() override {
+    projects_.SetNameCurrentProject(new_name_);
+  }
+
+ private:
+  ProjectList& projects_;
+  std::string new_name_;
+};
+
+class OpenLoadConfig : public Target {
+ public:
+  OpenLoadConfig(ProjectList& projects) : projects_(projects) {}
+
+  void Execute() override {
+    utils::OpenEditor(projects_.GetCurrentLoadConfig());
+  }
+
+ private:
+  ProjectList& projects_;
+  std::string new_name_;
+};
+
+class OpenProject : public Target {
+ public:
+  OpenProject(ProjectList& projects, const std::string& name) : projects_(projects), name_(name) {}
+
+  void Execute() override {
+    auto p = projects_.GetProjectByName(name_);
+
+    tmuxub::Tmux t(utils::GetProjectDirectory() / "tmuxsocket");
+    if (t.HasSession(name_)) {
+      t.ConnectToSession(name_);
+      t.Exec();
+    } else {
+      auto file = utils::filesystem::LoadFile(p->open_script.value());
+      chdir(std::string(p.value().root_project).data());
+      t.CreateSession(name_);
+      t.SplitWindow(file);
+      t.Exec();
+    }
+  }
+
+ private:
+  ProjectList& projects_;
+  std::string name_;
+};
 }  // namespace clippy::targets
diff --git a/src/main.cpp b/src/main.cpp
index 267527e..239901f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,6 +6,10 @@
 
 #include <csignal>
 
+#include <utils/filesystem.hpp>
+
+#include <jsoncons/json.hpp>
+
 int main(int argc, char* argv[]) {
   std::signal(SIGPIPE, SIG_IGN);
 
diff --git a/src/utils/filesystem.hpp b/src/utils/filesystem.hpp
new file mode 100644
index 0000000..0bd1e50
--- /dev/null
+++ b/src/utils/filesystem.hpp
@@ -0,0 +1,67 @@
+#pragma once
+
+#include <iostream>
+#include <string>
+#include <filesystem>
+#include <fstream>
+#include <random>
+#include <chrono>
+
+#include <utils/random.hpp>
+
+namespace utils::filesystem {
+inline std::string LoadFile(const std::filesystem::path& file) {
+  std::ifstream in(file);
+
+  std::string result;
+  std::string tmp;
+
+  while (std::getline(in, tmp)) {
+    result += tmp;
+    result += "\n";
+  }
+
+  return result;
+}
+
+inline std::filesystem::path GenerateFile(std::filesystem::path dir) {
+  if (!std::filesystem::is_directory(dir)) {
+    throw std::logic_error(std::string(dir) + " is not directory");
+  }
+
+  static auto RandomSymbol = []() {
+    int n = utils::random::RandInt(26 + 26 + 10);
+    if (n < 26) {
+      return 'a' + n;
+    } else if (n < 26 + 26) {
+      return 'A' + n - 26;
+    } else {
+      return '0' + n - 26 - 26;
+    }
+  };
+
+  auto GenerateFilename = [length = 6]() mutable {
+    if (length > 10) {
+      throw std::logic_error("failed to create file");
+    }
+    std::string filename;
+    for (size_t i = 0; i < length; ++i) {
+      filename += RandomSymbol();
+    }
+    length++;
+
+    return filename;
+  };
+
+  auto filename = GenerateFilename();
+  while (true) {
+    if (std::filesystem::status(dir / filename).type() == std::filesystem::file_type::not_found) {
+      break;
+    }
+
+    filename = GenerateFilename();
+  }
+
+  return dir / filename;
+}
+}  // namespace utils::filesystem
diff --git a/src/utils/random.hpp b/src/utils/random.hpp
new file mode 100644
index 0000000..d88612a
--- /dev/null
+++ b/src/utils/random.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <random>
+#include <chrono>
+
+namespace utils::random {
+static inline std::mt19937_64 rnd(std::chrono::system_clock::now().time_since_epoch().count());
+
+inline uint64_t RandInt(uint64_t max_n) {
+  return rnd() % max_n;
+}
+}