diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c69c3e..f95cf38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,16 +6,24 @@ project(xbot
 )
 
 find_package(PkgConfig REQUIRED)
-find_package(Boost 1.83.0 CONFIG COMPONENTS log)
+
 pkg_check_modules(LIBHS libhs REQUIRED IMPORTED_TARGET)
 
+set(BOOST_INCLUDE_LIBRARIES asio log signals2)
+set(BOOST_ENABLE_CMAKE ON)
 include(FetchContent)
 FetchContent_Declare(
-    tomlplusplus
-    GIT_REPOSITORY https://github.com/marzer/tomlplusplus.git
-    GIT_TAG        v3.4.0
+Boost
+URL https://github.com/boostorg/boost/releases/download/boost-1.87.0/boost-1.87.0-cmake.tar.xz
+URL_HASH SHA1=4ec86f884ffb57ce7f6a6c6eb05b1af247aba0ac
 )
+FetchContent_Declare(
+  tomlplusplus
+  GIT_REPOSITORY https://github.com/marzer/tomlplusplus.git
+  GIT_TAG        v3.4.0
+  )
 FetchContent_MakeAvailable(tomlplusplus)
+FetchContent_MakeAvailable(Boost)
 
 add_custom_command(
   OUTPUT irc_commands.inc
@@ -39,4 +47,4 @@ add_executable(xbot
 )
 
 target_include_directories(xbot PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
-target_link_libraries(xbot PRIVATE Boost::log Boost::boost tomlplusplus_tomlplusplus PkgConfig::LIBHS mybase64)
+target_link_libraries(xbot PRIVATE Boost::signals2 Boost::log Boost::asio tomlplusplus_tomlplusplus PkgConfig::LIBHS mybase64)
diff --git a/command_thread.cpp b/command_thread.cpp
deleted file mode 100644
index 7752f07..0000000
--- a/command_thread.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-#include "command_thread.hpp"
-
-#include "connection.hpp"
-#include "irc_parse_thread.hpp"
-#include "ircmsg.hpp"
-
-auto CommandThread::start(Connection& connection) -> void
-{
-    connection.add_listener<IrcMsgEvent>([&connection](IrcMsgEvent& event)
-    {
-        if (IrcCommand::PRIVMSG != event.command) return;
-        auto const message = event.irc.args[1];
-        if (message.empty()) return;
-        if ('!' != message.front()) return;
-
-        CommandEvent command_event;
-
-        {
-            auto const cmdend = message.find(' ');
-            if (std::string_view::npos == cmdend)
-            {
-                command_event.command = message.substr(1);
-            }
-            else
-            {
-                command_event.command = message.substr(1, cmdend - 1);
-                command_event.arg = message.substr(cmdend + 1);
-            }
-        }
-
-        {
-            auto const nickend = event.irc.source.find('!');
-            if (std::string_view::npos != nickend)
-            {
-                command_event.nick = event.irc.source.substr(0, nickend);
-            }
-        }
-
-        for (auto const& [k,v] : event.irc.tags)
-        {
-            if ("solanum.chat/oper" == k)
-            {
-                command_event.oper = v;
-            }
-            else if ("account" == k)
-            {
-                command_event.account = v;
-            }
-        }
-
-        connection.dispatch(command_event);
-    });
-}
diff --git a/command_thread.hpp b/command_thread.hpp
deleted file mode 100644
index d1b7e66..0000000
--- a/command_thread.hpp
+++ /dev/null
@@ -1,30 +0,0 @@
-#pragma once
-
-#include "event.hpp"
-
-#include <string_view>
-
-class Connection;
-
-struct CommandEvent : Event
-{
-    /// @brief oper account of sender
-    std::string_view oper;
-
-    /// @brief nickserv acccount of sender
-    std::string_view account;
-
-    /// @brief nickname of sender
-    std::string_view nick;
-
-    /// @brief command name excluding sigil
-    std::string_view command;
-
-    /// @brief complete argument excluding space after command
-    std::string_view arg;
-};
-
-struct CommandThread
-{
-    static auto start(Connection&) -> void;
-};
diff --git a/event.hpp b/event.hpp
deleted file mode 100644
index 9be648c..0000000
--- a/event.hpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#pragma once
-
-struct Event {
-    virtual ~Event() = default;
-    bool handled_ = false;
-};
diff --git a/ping_thread.cpp b/ping_thread.cpp
deleted file mode 100644
index 43838fc..0000000
--- a/ping_thread.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "ping_thread.hpp"
-
-#include "connection.hpp"
-#include "write_irc.hpp"
-
-auto PingThread::start(Connection& connection) -> void
-{
-    connection.sig_ircmsg.connect([&connection](auto cmd, auto& msg)
-    {
-        if (IrcCommand::PING == cmd)
-        {
-            send_pong(connection, msg.args[0]);
-        }
-    });
-}
diff --git a/ping_thread.hpp b/ping_thread.hpp
deleted file mode 100644
index 989c12e..0000000
--- a/ping_thread.hpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#pragma once
-
-struct Connection;
-
-struct PingThread
-{
-    static auto start(Connection& connection) -> void;
-};
diff --git a/priv_thread.cpp b/priv_thread.cpp
deleted file mode 100644
index b06a313..0000000
--- a/priv_thread.cpp
+++ /dev/null
@@ -1,224 +0,0 @@
-#include "priv_thread.hpp"
-
-#include "command_thread.hpp"
-#include "connection.hpp"
-#include "write_irc.hpp"
-
-#include <toml++/toml.hpp>
-
-#include <boost/log/trivial.hpp>
-
-#include <fstream>
-#include <sstream>
-#include <filesystem>
-
-PrivThread::PrivThread(Connection& connection, std::string config_path)
-: connection_{connection}
-, config_path_{std::move(config_path)}
-{
-}
-
-auto PrivThread::check_command(CommandEvent& event, std::string priv) -> bool
-{
-    auto check_priv = [&priv](auto& map, std::string const& name) {
-        auto const cursor = map.find(name);
-        return cursor != map.end() && cursor->second.contains(priv);
-    };
-    auto check = [&check_priv](auto& map, auto& name) {
-        return
-            (not name.empty() &&
-                (check_priv(map, wildcard) ||
-                check_priv(map, std::string{name})));
-    };
-    return check(oper_privs_, event.oper) || check(account_privs_, event.account);
-}
-
-auto PrivThread::list_privs(std::string_view nick) -> void
-{
-    for (auto const& [oper, privset] : oper_privs_)
-    {
-        std::string message = "Oper ";
-        message += oper;
-        message += ":";
-
-        for (auto const& priv : privset)
-        {
-            message += " ";
-            message += priv;
-        }
-
-        send_notice(connection_, nick, message);
-    }
-
-    for (auto const& [account, privset] : account_privs_)
-    {
-        std::string message = "Account ";
-        message += account;
-        message += ":";
-
-        for (auto const& priv : privset)
-        {
-            message += " ";
-            message += priv;
-        }
-
-        send_notice(connection_, nick, message);
-    }
-}
-
-auto PrivThread::on_command(CommandEvent& event) -> void
-{
-    if ("list_privs" == event.command)
-    {
-        if (check_command(event, PrivThread::owner_priv))
-        {
-            list_privs(event.nick);
-        }
-    }
-    else if ("add_priv" == event.command)
-    {
-        if (check_command(event, PrivThread::owner_priv))
-        {
-            auto in = std::istringstream{std::string{event.arg}};
-            std::string kind, name, priv;
-            if (in >> kind >> name >> priv)
-            {
-                if ("oper" == kind)
-                {
-                    oper_privs_[name].insert(priv);
-                    save_config();
-                    send_notice(connection_, event.nick, "ack");
-                    BOOST_LOG_TRIVIAL(info) << "Priv added. by:" << event.nick << " oper:" << name << " priv:" << priv;
-                    return;
-                }
-                else if ("account" == kind)
-                {
-                    account_privs_[name].insert(priv);
-                    save_config();
-                    send_notice(connection_, event.nick, "ack");
-                    BOOST_LOG_TRIVIAL(info) << "Priv added. by:" << event.nick << " account:" << name << " priv:" << priv;
-                    return;
-                }
-            }
-            send_notice(connection_, event.nick, "nak");
-        }
-    }
-    else if ("remove_priv" == event.command)
-    {
-        if (check_command(event, PrivThread::owner_priv))
-        {
-            auto in = std::istringstream{std::string{event.arg}};
-            std::string kind, name, priv;
-            if (in >> kind >> name >> priv)
-            {
-                if ("oper" == kind)
-                {
-                    if (wildcard == priv)
-                    {
-                        oper_privs_.erase(name);
-                    }
-                    else
-                    {
-                        oper_privs_[name].erase(priv);
-                        if (oper_privs_[name].empty()) oper_privs_.erase(name);
-                    }
-                    save_config();
-                    send_notice(connection_, event.nick, "ack");
-                    BOOST_LOG_TRIVIAL(info) << "Priv removed. by:" << event.nick << " oper:" << name << " priv:" << priv;
-                    return;
-                }
-                else if ("account" == kind)
-                {
-                    if (wildcard == priv)
-                    {
-                        account_privs_.erase(name);
-                    }
-                    else
-                    {
-                        account_privs_[name].erase(priv);
-                        if (account_privs_[name].empty()) account_privs_.erase(name);
-                    }
-                    save_config();
-                    send_notice(connection_, event.nick, "ack");
-                    BOOST_LOG_TRIVIAL(info) << "Priv removed. by:" << event.nick << " account:" << name << " priv:" << priv;
-                    return;
-                }
-            }
-            send_notice(connection_, event.nick, "nak");
-        }
-    }
-}
-
-auto PrivThread::save_config() -> void
-{
-    auto config = toml::table{};
-
-    auto serialize_table = [&config](auto name, auto& map) {
-        if (not map.empty()) {
-            auto tab = toml::table{};
-            for (auto const& [oper, privs] : map)
-            {
-                auto privset = toml::array{};
-                for (auto const& priv : privs)
-                {
-                    privset.push_back(priv);
-                }
-                tab.insert(oper, privset);
-            }
-            config.insert(name, tab);
-        }
-    };
-
-    serialize_table("oper", oper_privs_);
-    serialize_table("account", account_privs_);
-
-    std::string tmp = config_path_ + ".tmp";
-    std::ofstream{tmp} << config;
-    std::filesystem::rename(tmp, config_path_);
-}
-
-auto PrivThread::load_config() -> void
-{
-    if (auto in = std::ifstream{config_path_})
-    {
-        auto const config = toml::parse(in);
-
-        if (config.contains("oper"))
-        {
-            for (auto const [oper, privs] : *config["oper"].as_table())
-            {
-                auto& privset = oper_privs_[std::string{oper.str()}];
-                for (auto const& priv : *privs.as_array())
-                {
-                    privset.insert(priv.as_string()->get());
-                }
-            }
-        }
-
-        if (config.contains("account"))
-        {
-            for (auto const [account, privs] : *config["account"].as_table())
-            {
-                auto& privset = account_privs_[std::string{account.str()}];
-                for (auto const& priv : *privs.as_array())
-                {
-                    privset.insert(priv.as_string()->get());
-                }
-            }
-        }
-    }
-}
-
-auto PrivThread::start(Connection& connection, std::string config_path) -> std::shared_ptr<PrivThread>
-{
-    auto thread = std::make_shared<PrivThread>(connection, config_path);
-
-    thread->load_config();
-
-    connection.add_listener<CommandEvent>([thread](CommandEvent& event)
-    {
-        thread->on_command(event);
-    });
-
-    return thread;
-}
diff --git a/priv_thread.hpp b/priv_thread.hpp
deleted file mode 100644
index 5f7b48c..0000000
--- a/priv_thread.hpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#pragma once
-
-#include <memory>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-
-class Connection;
-class CommandEvent;
-
-class PrivThread : std::enable_shared_from_this<PrivThread>
-{
-    Connection& connection_;
-    std::string config_path_;
-
-    std::unordered_map<std::string, std::unordered_set<std::string>> oper_privs_;
-    std::unordered_map<std::string, std::unordered_set<std::string>> account_privs_;
-
-    auto on_command(CommandEvent&) -> void;
-
-    auto load_config() -> void;
-    auto save_config() -> void;
-    auto list_privs(std::string_view nick) -> void;
-
-public:
-    PrivThread(Connection&, std::string config_path);
-    auto check_command(CommandEvent& event, std::string priv) -> bool;
-
-    static constexpr char const* owner_priv = "owner";
-    static constexpr char const* wildcard = "*";
-
-    static auto start(Connection&, std::string config_path) -> std::shared_ptr<PrivThread>;
-};
diff --git a/settings.hpp b/settings.hpp
index 6609414..e1c3a29 100644
--- a/settings.hpp
+++ b/settings.hpp
@@ -12,10 +12,10 @@ struct Settings
     std::string realname;
     std::string nickname;
 
+    std::string sasl_mechanism;
     std::string sasl_authcid;
     std::string sasl_authzid;
     std::string sasl_password;
-    std::string sasl_mechanism;
 
     static auto from_stream(std::istream & in) -> Settings;
 };