diff --git a/matrix_appservice_kakaotalk/__main__.py b/matrix_appservice_kakaotalk/__main__.py
index 3a05681..8a03485 100644
--- a/matrix_appservice_kakaotalk/__main__.py
+++ b/matrix_appservice_kakaotalk/__main__.py
@@ -72,8 +72,6 @@ class KakaoTalkBridge(Bridge):
             puppet.stop()
         self.log.debug("Stopping kakaotalk listeners")
         User.shutdown = True
-        for user in User.by_ktid.values():
-            user.stop_listen()
         self.add_shutdown_actions(user.save() for user in User.by_mxid.values())
         self.add_shutdown_actions(KakaoTalkClient.stop_cls())
 
diff --git a/matrix_appservice_kakaotalk/commands/conn.py b/matrix_appservice_kakaotalk/commands/conn.py
index 6a1336e..3a171d6 100644
--- a/matrix_appservice_kakaotalk/commands/conn.py
+++ b/matrix_appservice_kakaotalk/commands/conn.py
@@ -17,6 +17,8 @@ from mautrix.bridge.commands import HelpSection, command_handler
 
 from .typehint import CommandEvent
 
+from ..kt.client.errors import CommandException
+
 SECTION_CONNECTION = HelpSection("Connection management", 15, "")
 
 
@@ -32,35 +34,6 @@ async def set_notice_room(evt: CommandEvent) -> None:
     await evt.reply("This room has been marked as your bridge notice room")
 
 
-"""
-@command_handler(
-    needs_auth=True,
-    management_only=True,
-    help_section=SECTION_CONNECTION,
-    help_text="Disconnect from KakaoTalk",
-)
-async def disconnect(evt: CommandEvent) -> None:
-    if not evt.sender.mqtt:
-        await evt.reply("You don't have a KakaoTalk MQTT connection")
-        return
-    evt.sender.mqtt.disconnect()
-
-
-@command_handler(
-    needs_auth=True,
-    management_only=True,
-    help_section=SECTION_CONNECTION,
-    help_text="Connect to KakaoTalk",
-    aliases=["reconnect"],
-)
-async def connect(evt: CommandEvent) -> None:
-    if evt.sender.listen_task and not evt.sender.listen_task.done():
-        await evt.reply("You already have a KakaoTalk MQTT connection")
-        return
-    evt.sender.start_listen()
-"""
-
-
 @command_handler(
     needs_auth=True,
     management_only=True,
@@ -72,34 +45,11 @@ async def ping(evt: CommandEvent) -> None:
         await evt.reply("You're not logged into KakaoTalk")
         return
     await evt.mark_read()
-    # try:
-    own_info = await evt.sender.get_own_info()
-    # TODO catch errors
-    # except fbchat.PleaseRefresh as e:
-    #     await evt.reply(f"{e}\n\nUse `$cmdprefix+sp refresh` refresh the session.")
-    #     return
-    await evt.reply(f"You're logged in as {own_info.nickname} (user ID {evt.sender.ktid})")
-
-    """
-    if not evt.sender.listen_task or evt.sender.listen_task.done():
-        await evt.reply("You don't have a KakaoTalk MQTT connection. Use `connect` to connect.")
-    elif not evt.sender.is_connected:
-        await evt.reply("The KakaoTalk MQTT listener is **disconnected**.")
-    else:
-        await evt.reply("The KakaoTalk MQTT listener is connected.")
-    """
-
-
-"""
-@command_handler(
-    needs_auth=True,
-    management_only=True,
-    help_section=SECTION_CONNECTION,
-    help_text="Resync chats and reconnect to MQTT",
-)
-async def refresh(evt: CommandEvent) -> None:
-    await evt.sender.refresh(force_notice=True)
-"""
+    try:
+        own_info = await evt.sender.get_own_info()
+        await evt.reply(f"You're logged in as {own_info.nickname} (user ID {evt.sender.ktid})")
+    except CommandException as e:
+        await evt.reply(f"Error from KakaoTalk: {e}")
 
 
 @command_handler(
@@ -107,10 +57,19 @@ async def refresh(evt: CommandEvent) -> None:
     management_only=True,
     help_section=SECTION_CONNECTION,
     help_text="Resync chats",
+    help_args="[count]",
 )
 async def sync(evt: CommandEvent) -> None:
+    try:
+        sync_count = int(evt.args[0])
+    except IndexError:
+        sync_count = None
+    except ValueError:
+        await evt.reply("**Usage:** `$cmdprefix+sp logout [--reset-device]`")
+        return
+
     await evt.mark_read()
-    if await evt.sender.post_login(is_startup=False):
+    if await evt.sender.connect_and_sync(sync_count):
         await evt.reply("Sync complete")
     else:
         await evt.reply("Sync failed")
diff --git a/matrix_appservice_kakaotalk/db/user.py b/matrix_appservice_kakaotalk/db/user.py
index 22f8dbe..476e186 100644
--- a/matrix_appservice_kakaotalk/db/user.py
+++ b/matrix_appservice_kakaotalk/db/user.py
@@ -47,24 +47,23 @@ class User:
     def _from_optional_row(cls, row: Record | None) -> User | None:
         return cls._from_row(row) if row is not None else None
 
+    _columns = "mxid, ktid, uuid, access_token, refresh_token, notice_room"
+
     @classmethod
     async def all_logged_in(cls) -> List[User]:
-        q = """
-            SELECT mxid, ktid, uuid, access_token, refresh_token, notice_room FROM "user"
-            WHERE ktid<>0
-        """
+        q = f'SELECT {cls._columns} FROM "user" WHERE ktid<>0'
         rows = await cls.db.fetch(q)
         return [cls._from_row(row) for row in rows if row]
 
     @classmethod
     async def get_by_ktid(cls, ktid: int) -> User | None:
-        q = 'SELECT mxid, ktid, uuid, access_token, refresh_token, notice_room FROM "user" WHERE ktid=$1'
+        q = f'SELECT {cls._columns} FROM "user" WHERE ktid=$1'
         row = await cls.db.fetchrow(q, ktid)
         return cls._from_optional_row(row)
 
     @classmethod
     async def get_by_mxid(cls, mxid: UserID) -> User | None:
-        q = 'SELECT mxid, ktid, uuid, access_token, refresh_token, notice_room FROM "user" WHERE mxid=$1'
+        q = f'SELECT {cls._columns} FROM "user" WHERE mxid=$1'
         row = await cls.db.fetchrow(q, mxid)
         return cls._from_optional_row(row)
 
@@ -73,23 +72,30 @@ class User:
         q = 'SELECT uuid FROM "user" WHERE uuid IS NOT NULL'
         return {tuple(record)[0] for record in await cls.db.fetch(q)}
 
+    @property
+    def _values(self):
+        return (
+            self.mxid,
+            self.ktid,
+            self.uuid,
+            self.access_token,
+            self.refresh_token,
+            self.notice_room,
+        )
+
     async def insert(self) -> None:
         q = """
             INSERT INTO "user" (mxid, ktid, uuid, access_token, refresh_token, notice_room) 
             VALUES ($1, $2, $3, $4, $5, $6)
         """
-        await self.db.execute(
-            q, self.mxid, self.ktid, self.uuid, self.access_token, self.refresh_token, self.notice_room
-        )
+        await self.db.execute(q, *self._values)
 
     async def delete(self) -> None:
         await self.db.execute('DELETE FROM "user" WHERE mxid=$1', self.mxid)
 
     async def save(self) -> None:
         q = """
-            UPDATE "user" SET ktid=$1, uuid=$2, access_token=$3, refresh_token=$4, notice_room=$5 
-            WHERE mxid=$6
+            UPDATE "user" SET ktid=$2, uuid=$3, access_token=$4, refresh_token=$5, notice_room=$6 
+            WHERE mxid=$1
         """
-        await self.db.execute(
-            q, self.ktid, self.uuid, self.access_token, self.refresh_token, self.notice_room, self.mxid
-        )
+        await self.db.execute(q, *self._values)
diff --git a/matrix_appservice_kakaotalk/example-config.yaml b/matrix_appservice_kakaotalk/example-config.yaml
index 1f6334a..1425d6a 100644
--- a/matrix_appservice_kakaotalk/example-config.yaml
+++ b/matrix_appservice_kakaotalk/example-config.yaml
@@ -122,7 +122,7 @@ bridge:
     command_prefix: "!kt"
 
     # Number of chats to sync (and create portals for) on startup/login.
-    # Set 0 to disable automatic syncing.
+    # Set to 0 to disable automatic syncing, or -1 to sync as much as possible.
     initial_chat_sync: 20
     # Whether or not the KakaoTalk users of logged in Matrix users should be
     # invited to private chats when the user sends a message from another client.
@@ -188,11 +188,11 @@ bridge:
         # usually needed to prevent rate limits and to allow timestamp massaging.
         invite_own_puppet: true
         # Maximum number of messages to backfill initially.
-        # Set to 0 to disable backfilling when creating portal.
+        # Set to 0 to disable backfilling when creating portal, or -1 to backfill as much as possible.
         initial_limit: 0
         # Maximum number of messages to backfill if messages were missed while
         # the bridge was disconnected.
-        # Set to 0 to disable backfilling missed messages.
+        # Set to 0 to disable backfilling missed messages, or -1 to backfill as much as possible.
         missed_limit: 1000
         # If using double puppeting, should notifications be disabled
         # while the initial backfill is in progress?
@@ -213,7 +213,7 @@ bridge:
     # The number of seconds that a disconnection can last without triggering an automatic re-sync
     # and missed message backfilling when reconnecting.
     # Set to 0 to always re-sync, or -1 to never re-sync automatically.
-    resync_max_disconnected_time: 5
+    #resync_max_disconnected_time: 5
     # Should the bridge do a resync on startup?
     sync_on_startup: true
     # Whether or not temporary disconnections should send notices to the notice room.
diff --git a/matrix_appservice_kakaotalk/kt/client/client.py b/matrix_appservice_kakaotalk/kt/client/client.py
index 7ee83cb..b231993 100644
--- a/matrix_appservice_kakaotalk/kt/client/client.py
+++ b/matrix_appservice_kakaotalk/kt/client/client.py
@@ -22,7 +22,7 @@ with any other potential backend.
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, cast, Awaitable, Callable, Type, Optional, Union
+from typing import TYPE_CHECKING, cast, Type, Optional, Union
 
 import logging
 import urllib.request
@@ -39,7 +39,6 @@ from ...rpc import RPCClient
 from ..types.api.struct.profile import ProfileReqStruct, ProfileStruct
 from ..types.bson import Long
 from ..types.client.client_session import LoginResult
-from ..types.channel.channel_type import ChannelType
 from ..types.chat.chat import Chatlog
 from ..types.oauth import OAuthCredential, OAuthInfo
 from ..types.request import (
@@ -63,7 +62,6 @@ except ImportError:
 if TYPE_CHECKING:
     from mautrix.types import JSON
     from ...user import User
-    from ...rpc.rpc import EventHandler
 
 
 # TODO Consider defining an interface for this, with node/native backend as swappable implementations
@@ -80,7 +78,6 @@ class Client:
     @classmethod
     async def stop_cls(cls) -> None:
         """Stop and disconnect from the Node backend."""
-        await cls._rpc_client.request("stop")
         await cls._rpc_client.disconnect()
 
 
@@ -102,16 +99,17 @@ class Client:
                 )
 
     @classmethod
-    async def register_device(cls, passcode: str, **req) -> None:
+    async def register_device(cls, passcode: str, **req: JSON) -> None:
         """Register a (fake) device that will be associated with the provided login credentials."""
         await cls._api_request_void("register_device", passcode=passcode, is_secret=True, **req)
 
     @classmethod
-    async def login(cls, **req) -> OAuthCredential:
+    async def login(cls, **req: JSON) -> OAuthCredential:
         """
         Obtain a session token by logging in with user-provided credentials.
         Must have first called register_device with these credentials.
         """
+        # NOTE Actually returns a LoginData object, but this only needs an OAuthCredential
         return await cls._api_request_result(OAuthCredential, "login", is_secret=True, **req)
 
     # endregion
@@ -181,20 +179,21 @@ class Client:
         self.user.oauth_credential = oauth_info.credential
         await self.user.save()
 
-    async def start(self) -> LoginResult:
+    async def connect(self) -> LoginResult:
         """
         Start a new session by providing a token obtained from a prior login.
         Receive a snapshot of account state in response.
         """
-        login_result = await self._api_user_request_result(LoginResult, "start")
+        login_result = await self._api_user_request_result(LoginResult, "connect")
         assert self.user.ktid == login_result.userId, f"User ID mismatch: expected {self.user.ktid}, got {login_result.userId}"
+        # TODO Skip if handlers are already listening. But this is idempotent and thus probably safe
+        self._start_listen()
         return login_result
 
-    """
-    async def is_connected(self) -> bool:
-        resp = await self._rpc_client.request("is_connected")
-        return resp["is_connected"]
-    """
+    async def disconnect(self) -> bool:
+        connection_existed = await self._rpc_client.request("disconnect", mxid=self.user.mxid)
+        self._stop_listen()
+        return connection_existed
 
     async def fetch_logged_in_user(self, post_login: bool = False) -> ProfileStruct:
         profile_req_struct = await self._api_user_request_result(ProfileReqStruct, "get_own_profile")
@@ -232,14 +231,6 @@ class Client:
             text=text
         )
 
-    async def start_listen(self) -> None:
-        # TODO Connect all listeners here?
-        await self._api_user_request_void("start_listen")
-
-    async def stop(self) -> None:
-        # TODO Stop all event handlers
-        await self._api_user_request_void("stop")
-
 
     # TODO Combine these into one
 
@@ -272,19 +263,31 @@ class Client:
 
     # region listeners
 
-    async def on_message(self, func: Callable[[Chatlog, Long, ChannelType], Awaitable[None]]) -> None:
-        async def wrapper(data: dict[str, JSON]) -> None:
-            await func(
-                Chatlog.deserialize(data["chatlog"]),
-                Long.deserialize(data["channelId"]),
-                data["channelType"]
-            )
+    async def _on_message(self, data: dict[str, JSON]) -> None:
+        await self.user.on_message(
+            Chatlog.deserialize(data["chatlog"]),
+            Long.deserialize(data["channelId"]),
+            data["channelType"]
+        )
 
-        self._add_user_handler("message", wrapper)
+    """ TODO
+    async def _on_receipt(self, data: Dict[str, JSON]) -> None:
+        await self.user.on_receipt(Receipt.deserialize(data["receipt"]))
+    """
 
 
-    def _add_user_handler(self, command: str, handler: EventHandler) -> str:
-        self._rpc_client.add_event_handler(f"{command}:{self.user.mxid}", handler)
+    def _start_listen(self) -> None:
+        # TODO Automate this somehow, like with a fancy enum
+        self._rpc_client.set_event_handlers(self._get_user_cmd("message"), [self._on_message])
+        # TODO many more listeners
+
+    def _stop_listen(self) -> None:
+        # TODO Automate this somehow, like with a fancy enum
+        self._rpc_client.set_event_handlers(self._get_user_cmd("message"), [])
+        # TODO many more listeners
+
+    def _get_user_cmd(self, command) -> str:
+        return f"{command}:{self.user.mxid}"
 
     # endregion
 
diff --git a/matrix_appservice_kakaotalk/kt/types/request.py b/matrix_appservice_kakaotalk/kt/types/request.py
index eb862a0..ac92693 100644
--- a/matrix_appservice_kakaotalk/kt/types/request.py
+++ b/matrix_appservice_kakaotalk/kt/types/request.py
@@ -79,6 +79,16 @@ class RootCommandResult(ResponseState):
     """For brevity, this also encompasses CommandResultFailed and CommandResultDoneVoid"""
     success: bool
 
+    @classmethod
+    def deserialize(cls, data: JSON) -> "RootCommandResult":
+        if not data or "success" not in data or "status" not in data:
+            return RootCommandResult(
+                success=True,
+                status=KnownDataStatusCode.SUCCESS
+            )
+        else:
+            return super().deserialize(data)
+
 
 ResultType = TypeVar("ResultType", bound=Serializable)
 
diff --git a/matrix_appservice_kakaotalk/portal.py b/matrix_appservice_kakaotalk/portal.py
index 5b39445..6e7fbf9 100644
--- a/matrix_appservice_kakaotalk/portal.py
+++ b/matrix_appservice_kakaotalk/portal.py
@@ -16,7 +16,6 @@
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, Any, AsyncGenerator, Pattern, cast
-from collections import deque
 import asyncio
 import re
 import time
@@ -845,11 +844,6 @@ class Portal(DBPortal, BasePortal):
                 return False
         return True
 
-    async def _add_kakaotalk_reply(
-        self, content: MessageEventContent, reply_to: None
-    ) -> None:
-        self.log.info("TODO")
-
     async def handle_remote_message(
         self,
         source: u.User,
@@ -969,7 +963,7 @@ class Portal(DBPortal, BasePortal):
         if not messages:
             self.log.debug("Didn't get any messages from server")
             return
-        self.log.debug(f"Got {len(messages)} message{'s' if len(messages) is not 1 else ''} from server")
+        self.log.debug(f"Got {len(messages)} message{'s' if len(messages) > 1 else ''} from server")
         self._backfill_leave = set()
         async with NotificationDisabler(self.mxid, source):
             for message in messages:
diff --git a/matrix_appservice_kakaotalk/rpc/__init__.py b/matrix_appservice_kakaotalk/rpc/__init__.py
index 33792bd..f5125b1 100644
--- a/matrix_appservice_kakaotalk/rpc/__init__.py
+++ b/matrix_appservice_kakaotalk/rpc/__init__.py
@@ -1 +1,2 @@
 from .rpc import RPCClient
+from .types import RPCError
diff --git a/matrix_appservice_kakaotalk/rpc/rpc.py b/matrix_appservice_kakaotalk/rpc/rpc.py
index 3820317..59d8d84 100644
--- a/matrix_appservice_kakaotalk/rpc/rpc.py
+++ b/matrix_appservice_kakaotalk/rpc/rpc.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 from __future__ import annotations
 
-from typing import Any, Callable, Awaitable, List
+from typing import Any, Callable, Awaitable
 
 import asyncio
 import json
@@ -39,7 +39,7 @@ class RPCClient:
     _req_id: int
     _min_broadcast_id: int
     _response_waiters: dict[int, asyncio.Future[JSON]]
-    _event_handlers: dict[str, List[EventHandler]]
+    _event_handlers: dict[str, list[EventHandler]]
     _command_queue: asyncio.Queue
 
     def __init__(self, config: Config) -> None:
@@ -98,7 +98,13 @@ class RPCClient:
         self._event_handlers.setdefault(method, []).append(handler)
 
     def remove_event_handler(self, method: str, handler: EventHandler) -> None:
-        self._event_handlers.setdefault(method, []).remove(handler)
+        try:
+            self._event_handlers.setdefault(method, []).remove(handler)
+        except ValueError:
+            pass
+
+    def set_event_handlers(self, method: str, handlers: list[EventHandler]) -> None:
+        self._event_handlers[method] = handlers
 
     async def _run_event_handler(self, req_id: int, command: str, req: dict[str, Any]) -> None:
         if req_id > self._min_broadcast_id:
diff --git a/matrix_appservice_kakaotalk/user.py b/matrix_appservice_kakaotalk/user.py
index 136d647..b8b7c89 100644
--- a/matrix_appservice_kakaotalk/user.py
+++ b/matrix_appservice_kakaotalk/user.py
@@ -46,9 +46,7 @@ from .kt.types.client.client_session import ChannelLoginDataItem, LoginResult
 from .kt.types.oauth import OAuthCredential
 from .kt.types.openlink.open_channel_info import OpenChannelData, OpenChannelInfo
 
-METRIC_SYNC_CHANNELS = Summary("bridge_sync_channels", "calls to _sync_channels")
-METRIC_RESYNC = Summary("bridge_on_resync", "calls to on_resync")
-METRIC_UNKNOWN_EVENT = Summary("bridge_on_unknown_event", "calls to on_unknown_event")
+METRIC_CONNECT_AND_SYNC = Summary("bridge_sync_channels", "calls to connect_and_sync")
 METRIC_MEMBERS_ADDED = Summary("bridge_on_members_added", "calls to on_members_added")
 METRIC_MEMBER_REMOVED = Summary("bridge_on_member_removed", "calls to on_member_removed")
 METRIC_TYPING = Summary("bridge_on_typing", "calls to on_typing")
@@ -58,7 +56,6 @@ METRIC_MESSAGE_UNSENT = Summary("bridge_on_unsent", "calls to on_unsent")
 METRIC_MESSAGE_SEEN = Summary("bridge_on_message_seen", "calls to on_message_seen")
 METRIC_TITLE_CHANGE = Summary("bridge_on_title_change", "calls to on_title_change")
 METRIC_AVATAR_CHANGE = Summary("bridge_on_avatar_change", "calls to on_avatar_change")
-METRIC_THREAD_CHANGE = Summary("bridge_on_thread_change", "calls to on_thread_change")
 METRIC_MESSAGE = Summary("bridge_on_message", "calls to on_message")
 METRIC_LOGGED_IN = Gauge("bridge_logged_in", "Users logged into the bridge")
 METRIC_CONNECTED = Gauge("bridge_connected", "Bridge users connected to KakaoTalk")
@@ -71,7 +68,6 @@ BridgeState.human_readable_errors.update(
         "kt-reconnection-error": "Failed to reconnect to KakaoTalk",
         "kt-connection-error": "KakaoTalk disconnected unexpectedly",
         "kt-auth-error": "Authentication error from KakaoTalk: {message}",
-        "kt-start-error": "Startup error from KakaoTalk: {message}",
         "kt-disconnected": None,
         "logged-out": "You're not logged into KakaoTalk",
     }
@@ -79,7 +75,6 @@ BridgeState.human_readable_errors.update(
 
 
 class User(DBUser, BaseUser):
-    #temp_disconnect_notices: bool = True
     shutdown: bool = False
     config: Config
 
@@ -90,16 +85,13 @@ class User(DBUser, BaseUser):
 
     _notice_room_lock: asyncio.Lock
     _notice_send_lock: asyncio.Lock
-    command_status: dict | None
     is_admin: bool
     permission_level: str
     _is_logged_in: bool | None
-    #_is_connected: bool | None
-    #_connection_time: float
-    _prev_reconnect_fail_refresh: float
+    _is_connected: bool | None
+    _connection_time: float
     _db_instance: DBUser | None
     _sync_lock: SimpleLock
-    _is_refreshing: bool
     _logged_in_info: ProfileStruct | None
     _logged_in_info_time: float
 
@@ -124,7 +116,6 @@ class User(DBUser, BaseUser):
         self.notice_room = notice_room
         self._notice_room_lock = asyncio.Lock()
         self._notice_send_lock = asyncio.Lock()
-        self.command_status = None
         (
             self.relay_whitelisted,
             self.is_whitelisted,
@@ -132,13 +123,11 @@ class User(DBUser, BaseUser):
             self.permission_level,
         ) = self.config.get_permissions(mxid)
         self._is_logged_in = None
-        #self._is_connected = None
-        #self._connection_time = time.monotonic()
-        self._prev_reconnect_fail_refresh = time.monotonic()
+        self._is_connected = None
+        self._connection_time = time.monotonic()
         self._sync_lock = SimpleLock(
             "Waiting for thread sync to finish before handling %s", log=self.log
         )
-        self._is_refreshing = False
         self._logged_in_info = None
         self._logged_in_info_time = 0
 
@@ -150,10 +139,8 @@ class User(DBUser, BaseUser):
         cls.config = bridge.config
         cls.az = bridge.az
         cls.loop = bridge.loop
-        #cls.temp_disconnect_notices = bridge.config["bridge.temporary_disconnect_notices"]
         return (user.reload_session(is_startup=True) async for user in cls.all_logged_in())
 
-    """
     @property
     def is_connected(self) -> bool | None:
         return self._is_connected
@@ -167,11 +154,11 @@ class User(DBUser, BaseUser):
     @property
     def connection_time(self) -> float:
         return self._connection_time
-    """
 
     @property
     def has_state(self) -> bool:
-        return bool(self.uuid and self.ktid and self.access_token and self.refresh_token)
+        # TODO If more state is needed, consider returning a saved LoginResult
+        return bool(self.access_token and self.refresh_token)
 
     # region Database getters
 
@@ -233,11 +220,13 @@ class User(DBUser, BaseUser):
     async def get_uuid(self, force: bool = False) -> str:
         if self.uuid is None or force:
             self.uuid = await self._generate_uuid()
+            # TODO Maybe don't save yet
             await self.save()
         return self.uuid
 
-    async def _generate_uuid(self) -> str:
-        return await Client.generate_uuid(await self.get_all_uuids())
+    @classmethod
+    async def _generate_uuid(cls) -> str:
+        return await Client.generate_uuid(await super().get_all_uuids())
 
     # endregion
 
@@ -285,8 +274,7 @@ class User(DBUser, BaseUser):
             self._logged_in_info_time = time.monotonic()
             self._track_metric(METRIC_LOGGED_IN, True)
             self._is_logged_in = True
-            #self.is_connected = None
-            self.stop_listen()
+            self.is_connected = None
             asyncio.create_task(self.post_login(is_startup=is_startup))
             return True
         return False
@@ -310,10 +298,9 @@ class User(DBUser, BaseUser):
     ) -> ProfileStruct:
         if not client:
             client = self.client
-        # TODO Retry network connection failures here, or in the client?
+        # TODO Retry network connection failures here, or in the client (like token refreshes are)?
         try:
             return await client.fetch_logged_in_user()
-        # NOTE Not catching InvalidAccessToken here, as client handles it & tries to refresh the token
         except AuthenticationRequired as e:
             if action != "restore session":
                 await self._send_reset_notice(e)
@@ -352,7 +339,7 @@ class User(DBUser, BaseUser):
                     state_event=BridgeStateEvent.TRANSIENT_DISCONNECT,
                 )
                 await asyncio.sleep(60)
-                await self.reload_session(event_id, retries - 1)
+                await self.reload_session(event_id, retries - 1, is_startup)
             else:
                 await self.send_bridge_notice(
                     notice,
@@ -362,44 +349,43 @@ class User(DBUser, BaseUser):
                     error_code="kt-reconnection-error",
                 )
         except Exception:
+            self.log.exception("Error connecting to KakaoTalk")
             await self.send_bridge_notice(
                 "Failed to connect to KakaoTalk: unknown error (see logs for more details)",
                 edit=event_id,
                 state_event=BridgeStateEvent.UNKNOWN_ERROR,
                 error_code="kt-reconnection-error",
             )
-        finally:
-            self._is_refreshing = False
 
-    async def logout(self, *, remove_ktid: bool = True, reset_device: bool = False) -> bool:
-        ok = True
-        self.stop_listen()
-        if self.has_state:
-            # TODO Log out of KakaoTalk if an API exists for it
-            pass
+    async def logout(self, *, remove_ktid: bool = True, reset_device: bool = False) -> None:
+        if self.client:
+            # TODO Look for a logout API call
+            was_connected = await self.client.disconnect()
+            if was_connected != self._is_connected:
+                self.log.warn(
+                    f"Node backend was{' not' if not was_connected else ''} connected, "
+                    f"but we thought it was{' not' if not self._is_connected else ''}")
         if remove_ktid:
             await self.push_bridge_state(BridgeStateEvent.LOGGED_OUT)
         self._track_metric(METRIC_LOGGED_IN, False)
-        self._is_logged_in = False
-        #self.is_connected = None
-        if self.client:
-            await self.client.stop()
-            self.client = None
-
-        if self.ktid and remove_ktid:
-            #await UserPortal.delete_all(self.ktid)
-            del self.by_ktid[self.ktid]
-            self.ktid = None
 
         if reset_device:
             self.uuid = await self._generate_uuid()
         self.access_token = None
         self.refresh_token = None
 
-        await self.save()
-        return ok
+        self._is_logged_in = False
+        self.is_connected = None
+        self.client = None
 
-    async def post_login(self, is_startup: bool) -> bool:
+        if self.ktid and remove_ktid:
+            #await UserPortal.delete_all(self.ktid)
+            del self.by_ktid[self.ktid]
+            self.ktid = None
+
+        await self.save()
+
+    async def post_login(self, is_startup: bool) -> None:
         self.log.info("Running post-login actions")
         self._add_to_cache()
 
@@ -412,12 +398,27 @@ class User(DBUser, BaseUser):
         except Exception:
             self.log.exception("Failed to automatically enable custom puppet")
 
-        assert self.client
+        # TODO Check if things break when a live message comes in during syncing
+        if self.config["bridge.sync_on_startup"] or not is_startup:
+            sync_count = self.config["bridge.initial_chat_sync"]
+        else:
+            sync_count = None
+        await self.connect_and_sync(sync_count)
+
+    async def get_direct_chats(self) -> dict[UserID, list[RoomID]]:
+        return {
+            pu.Puppet.get_mxid_from_id(portal.ktid): [portal.mxid]
+            async for portal in po.Portal.get_all_by_receiver(self.ktid)
+            if portal.mxid
+        }
+
+    @async_time(METRIC_CONNECT_AND_SYNC)
+    async def connect_and_sync(self, sync_count: int | None) -> bool:
+        # TODO Look for a way to sync all channels without (re-)logging in
         try:
-            # TODO if not is_startup, close existing listeners
-            login_result = await self.client.start()
-            await self._sync_channels(login_result, is_startup)
-            self.start_listen()
+            login_result = await self.client.connect()
+            await self.push_bridge_state(BridgeStateEvent.CONNECTED)
+            await self._sync_channels(login_result, sync_count)
             return True
         except AuthenticationRequired as e:
             await self.send_bridge_notice(
@@ -429,41 +430,34 @@ class User(DBUser, BaseUser):
             )
             await self.logout(remove_ktid=False)
         except Exception as e:
-            self.log.exception("Failed to start client")
-            await self.send_bridge_notice(
-                f"Got error from KakaoTalk:\n\n> {e!s}\n\n",
-                important=True,
-                state_event=BridgeStateEvent.UNKNOWN_ERROR,
-                error_code="kt-start-error",
-                error_message=str(e),
-            )
+            self.log.exception("Failed to connect and sync")
+            await self.push_bridge_state(BridgeStateEvent.UNKNOWN_ERROR, message=str(e))
         return False
 
-    async def get_direct_chats(self) -> dict[UserID, list[RoomID]]:
-        return {
-            pu.Puppet.get_mxid_from_id(portal.ktid): [portal.mxid]
-            async for portal in po.Portal.get_all_by_receiver(self.ktid)
-            if portal.mxid
-        }
-
-    @async_time(METRIC_SYNC_CHANNELS)
-    async def _sync_channels(self, login_result: LoginResult, is_startup: bool) -> None:
-        # TODO Look for a way to sync all channels without (re-)logging in
-        sync_count = self.config["bridge.initial_chat_sync"]
-        if sync_count <= 0 or not self.config["bridge.sync_on_startup"] and is_startup:
-            self.log.debug(f"Skipping channel syncing{' on startup' if sync_count > 0 else ''}")
+    async def _sync_channels(self, login_result: LoginResult, sync_count: int | None) -> None:
+        if sync_count is None:
+            sync_count = self.config["bridge.initial_chat_sync"]
+        if not sync_count:
+            self.log.debug("Skipping channel syncing")
             return
         if not login_result.channelList:
             self.log.debug("No channels to sync")
             return
         # TODO What about removed channels? Don't early-return then
 
-        sync_count = min(sync_count, len(login_result.channelList))
+        num_channels = len(login_result.channelList)
+        sync_count = num_channels if sync_count < 0 else min(sync_count, num_channels)
         await self.push_bridge_state(BridgeStateEvent.BACKFILLING)
-        self.log.debug(f"Syncing {sync_count} of {len(login_result.channelList)} channels...")
+        self.log.debug(f"Syncing {sync_count} of {num_channels} channels...")
         for channel_item in login_result.channelList[:sync_count]:
-            # TODO try-except here, above, below?
-            await self._sync_channel(channel_item)
+            try:
+                await self._sync_channel(channel_item)
+            except AuthenticationRequired:
+                raise
+            except Exception:
+                self.log.exception(f"Failed to sync channel {channel_item.channel.channelId}")
+
+        await self.update_direct_chats()
 
     async def _sync_channel(self, channel_item: ChannelLoginDataItem) -> None:
         channel_data = channel_item.channel
@@ -573,18 +567,12 @@ class User(DBUser, BaseUser):
             state.remote_name = puppet.name
 
     async def get_bridge_states(self) -> list[BridgeState]:
-        self.log.info("TODO: get_bridge_states")
-        return []
-        """
         if not self.state:
             return []
         state = BridgeState(state_event=BridgeStateEvent.UNKNOWN_ERROR)
         if self.is_connected:
             state.state_event = BridgeStateEvent.CONNECTED
-        elif self._is_refreshing or self.mqtt:
-            state.state_event = BridgeStateEvent.TRANSIENT_DISCONNECT
         return [state]
-        """
 
     async def get_puppet(self) -> pu.Puppet | None:
         if not self.ktid:
@@ -593,36 +581,10 @@ class User(DBUser, BaseUser):
 
     # region KakaoTalk event handling
 
-    def start_listen(self) -> None:
-        self.listen_task = asyncio.create_task(self._try_listen())
-
-    def _disconnect_listener_after_error(self) -> None:
-        self.log.info("TODO: _disconnect_listener_after_error")
-
-    async def _try_listen(self) -> None:
-        try:
-            # TODO Pass all listeners to start_listen instead of registering them one-by-one?
-            await self.client.start_listen()
-            await self.client.on_message(self.on_message)
-        # TODO Handle auth errors specially?
-        #except AuthenticationRequired as e:
-        except Exception:
-            #self.is_connected = False
-            self.log.exception("Fatal error in listener")
-            await self.send_bridge_notice(
-                "Fatal error in listener (see logs for more info)",
-                state_event=BridgeStateEvent.UNKNOWN_ERROR,
-                important=True,
-                error_code="kt-connection-error",
-            )
-            self._disconnect_listener_after_error()
-
-    def stop_listen(self) -> None:
-        self.log.info("TODO: stop_listen")
-
     async def on_logged_in(self, oauth_credential: OAuthCredential) -> None:
         self.log.debug(f"Successfully logged in as {oauth_credential.userId}")
         self.oauth_credential = oauth_credential
+        await self.push_bridge_state(BridgeStateEvent.CONNECTING)
         self.client = Client(self, log=self.log.getChild("ktclient"))
         await self.save()
         self._is_logged_in = True
@@ -631,7 +593,6 @@ class User(DBUser, BaseUser):
             self._logged_in_info_time = time.monotonic()
         except Exception:
             self.log.exception("Failed to fetch post-login info")
-        self.stop_listen()
         asyncio.create_task(self.post_login(is_startup=True))
 
     @async_time(METRIC_MESSAGE)
diff --git a/node/src/client.js b/node/src/client.js
index 6c203ac..f05d8de 100644
--- a/node/src/client.js
+++ b/node/src/client.js
@@ -14,7 +14,6 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import { Long } from "bson"
-import { emitLines, promisify } from "./util.js"
 import {
 	AuthApiClient,
 	OAuthApiClient,
@@ -28,6 +27,8 @@ const { KnownChatType } = chat
 /** @typedef {import("node-kakao").OAuthCredential} OAuthCredential */
 /** @typedef {import("./clientmanager.js").default} ClientManager} */
 
+import { emitLines, promisify } from "./util.js"
+
 
 class UserClient {
 	static #initializing = false
@@ -36,7 +37,7 @@ class UserClient {
 	get talkClient() { return this.#talkClient }
 
 	/** @type {ServiceApiClient} */
-	#serviceClient = null
+	#serviceClient
 	get serviceClient() { return this.#serviceClient }
 
 	/**
@@ -80,7 +81,6 @@ class UserClient {
 }
 
 export default class PeerClient {
-
 	/**
 	 * @param {ClientManager} manager
 	 * @param {import("net").Socket} socket
@@ -136,6 +136,7 @@ export default class PeerClient {
 			return
 		}
 		this.stopped = true
+		this.#closeUsers()
 		try {
 			await this.#write({ id: --this.notificationID, command: "quit", error })
 			await promisify(cb => this.socket.end(cb))
@@ -145,20 +146,21 @@ export default class PeerClient {
 		}
 	}
 
-	handleEnd = async () => {
-		// TODO Persist clients across bridge disconnections.
-		//      But then have to queue received events until bridge acks them!
+	handleEnd = () => {
+		this.stopped = true
+		this.#closeUsers()
+		if (this.peerID && this.manager.clients.get(this.peerID) === this) {
+			this.manager.clients.delete(this.peerID)
+		}
+		this.log(`Connection closed (peer: ${this.peerID})`)
+	}
+
+	#closeUsers() {
 		this.log("Closing all API clients for", this.peerID)
 		for (const userClient of this.userClients.values()) {
 			userClient.close()
 		}
 		this.userClients.clear()
-
-		this.stopped = true
-		if (this.peerID && this.manager.clients.get(this.peerID) === this) {
-			this.manager.clients.delete(this.peerID)
-		}
-		this.log(`Connection closed (peer: ${this.peerID})`)
 	}
 
 	/**
@@ -178,6 +180,7 @@ export default class PeerClient {
 	 * @param {Object} req.form
 	 */
 	registerDevice = async (req) => {
+		// TODO Look for a deregister API call
 		const authClient = await this.#createAuthClient(req.uuid)
 		return await authClient.registerDevice(req.form, req.passcode, true)
 	}
@@ -192,6 +195,7 @@ export default class PeerClient {
 	 * request failed, its status is stored here.
 	 */
 	handleLogin = async (req) => {
+		// TODO Look for a logout API call
 		const authClient = await this.#createAuthClient(req.uuid)
 		const loginRes = await authClient.login(req.form, true)
 		if (loginRes.status === KnownAuthStatusCode.DEVICE_NOT_REGISTERED) {
@@ -226,6 +230,15 @@ export default class PeerClient {
 		return userClient
 	}
 
+	/**
+	 * Unchecked lookup of a UserClient for a given mxid.
+	 * @param {string} mxid
+	 * @returns {UserClient | undefined}
+	 */
+	#tryGetUser(mxid) {
+		return this.userClients.get(mxid)
+	}
+
 	/**
 	 * Get the service client for the specified user ID, or create
 	 * and return a new service client if no user ID is provided.
@@ -233,7 +246,7 @@ export default class PeerClient {
 	 * @param {OAuthCredential} oauth_credential
 	 */
 	async #getServiceClient(mxid, oauth_credential) {
-		return this.userClients.get(mxid)?.serviceClient ||
+		return this.#tryGetUser(mxid)?.serviceClient ||
 			await ServiceApiClient.create(oauth_credential)
 	}
 	
@@ -251,26 +264,15 @@ export default class PeerClient {
 	 * @param {string} req.mxid
 	 * @param {OAuthCredential} req.oauth_credential
 	 */
-	handleStart = async (req) => {
+	handleConnect = async (req) => {
 		// TODO Don't re-login if possible. But must still return a LoginResult!
-		{
-			const oldUserClient = this.userClients.get(req.mxid)
-			if (oldUserClient !== undefined) {
-				oldUserClient.close()
-				this.userClients.delete(req.mxid)
-			}
-		}
+		this.handleDisconnect(req)
 
 		const userClient = await UserClient.create(req.mxid, req.oauth_credential)
 		const res = await userClient.talkClient.login(req.oauth_credential)
 		if (!res.success) return res
 
 		this.userClients.set(req.mxid, userClient)
-		return res
-	}
-
-	startListen = async (req) => {
-		const userClient = this.#getUser(req.mxid)
 
 		userClient.talkClient.on("chat", (data, channel) => {
 			this.log(`Received message ${data.chat.logId} in channel ${channel.channelId}`)
@@ -291,7 +293,22 @@ export default class PeerClient {
 		})
 		*/
 
-		return this.#voidCommandResult
+		return res
+	}
+
+	/**
+	 * @param {Object} req
+	 * @param {string} req.mxid
+	 */
+	handleDisconnect = (req) => {
+		const userClient = this.#tryGetUser(req.mxid)
+		if (!!userClient) {
+			userClient.close()
+			this.userClients.delete(req.mxid)
+			return true
+		} else {
+			return false
+		}
 	}
 
 	/**
@@ -368,16 +385,6 @@ export default class PeerClient {
 		})
 	}
 
-	/**
-	 * @param {Object} req
-	 * @param {string} req.mxid
-	 */
-	handleStop = async (req) => {
-		this.#getUser(req.mxid).close()
-		this.userClients.delete(req.mxid)
-		return this.#voidCommandResult
-	}
-
 	#makeCommandResult(result) {
 		return {
 			success: true,
@@ -386,11 +393,6 @@ export default class PeerClient {
 		}
 	}
 
-	#voidCommandResult = {
-		success: true,
-		status: 0,
-	}
-
 	handleUnknownCommand = () => {
 		throw new Error("Unknown command")
 	}
@@ -431,9 +433,6 @@ export default class PeerClient {
 			this.log("Ignoring old request", req.id)
 			return
 		}
-		if (req.command != "is_connected") {
-			this.log("Received request", req.id, "with command", req.command)
-		}
 		this.maxCommandID = req.id
 		let handler
 		if (!this.peerID) {
@@ -449,21 +448,18 @@ export default class PeerClient {
 			handler = this.handleRegister
 		} else {
 			handler = {
-				// TODO Subclass / object for KakaoTalk-specific handlers?
-				start: this.handleStart,
-				stop: this.handleStop,
-				disconnect: () => this.stop(),
-				login: this.handleLogin,
-				renew: this.handleRenew,
+				// TODO Wrapper for per-user commands
 				generate_uuid: util.randomAndroidSubDeviceUUID,
 				register_device: this.registerDevice,
-				start_listen: this.startListen,
+				login: this.handleLogin,
+				renew: this.handleRenew,
+				connect: this.handleConnect,
+				disconnect: this.handleDisconnect,
 				get_own_profile: this.getOwnProfile,
+				get_profile: this.getProfile,
 				get_portal_channel_info: this.getPortalChannelInfo,
 				get_chats: this.getChats,
-				get_profile: this.getProfile,
 				send_message: this.sendMessage,
-				//is_connected: async () => ({ is_connected: !await this.puppet.isDisconnected() }),
 			}[req.command] || this.handleUnknownCommand
 		}
 		const resp = { id: req.id }
@@ -482,6 +478,7 @@ export default class PeerClient {
 				resp.command = "error"
 				resp.error = err.toString()
 				this.log(`Error handling request ${resp.id} ${err.stack}`)
+				// TODO Check if session is broken. If it is, close the PeerClient
 			}
 		}
 		await this.#write(resp)
diff --git a/node/src/clientmanager.js b/node/src/clientmanager.js
index c993d26..988dc63 100644
--- a/node/src/clientmanager.js
+++ b/node/src/clientmanager.js
@@ -20,6 +20,7 @@ import path from "path"
 import PeerClient from "./client.js"
 import { promisify } from "./util.js"
 
+
 export default class ClientManager {
 	constructor(listenConfig) {
 		this.listenConfig = listenConfig
diff --git a/node/src/main.js b/node/src/main.js
index 6fcc49a..d258d9f 100644
--- a/node/src/main.js
+++ b/node/src/main.js
@@ -15,12 +15,13 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import process from "process"
 import fs from "fs"
-import sd from "systemd-daemon"
 
 import arg from "arg"
+import sd from "systemd-daemon"
 
 import ClientManager from "./clientmanager.js"
 
+
 const args = arg({
 	"--config": String,
 	"-c": "--config",
@@ -31,10 +32,10 @@ const configPath = args["--config"] || "config.json"
 console.log("[Main] Reading config from", configPath)
 const config = JSON.parse(fs.readFileSync(configPath).toString())
 
-const api = new ClientManager(config.listen)
+const manager = new ClientManager(config.listen)
 
 function stop() {
-	api.stop().then(() => {
+	manager.stop().then(() => {
 		console.log("[Main] Everything stopped")
 		process.exit(0)
 	}, err => {
@@ -43,7 +44,7 @@ function stop() {
 	})
 }
 
-api.start().then(() => {
+manager.start().then(() => {
 	process.once("SIGINT", stop)
 	process.once("SIGTERM", stop)
 	sd.notify("READY=1")
diff --git a/requirements.txt b/requirements.txt
index 8ea98d6..ca5978a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 aiohttp>=3,<4
 asyncpg>=0.20,<0.26
-bson>=0.5,<0.6
 commonmark>=0.8,<0.10
 mautrix==0.15.0rc4
 pycryptodome>=3,<4