diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4ced482..23fb93e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,9 +12,13 @@ jobs:
     - uses: pre-commit/action@v3.0.1
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
       - uses: astral-sh/setup-uv@v4
-      - run: uv sync --group test
+      - run: uv python install ${{ matrix.python-version }}
+      - run: uv sync --group test --python ${{ matrix.python-version }}
       - run: uv pip install -e .
       - run: uv run pytest tests/ --ignore=tests/real_plc_s1200/
diff --git a/AGENTS.md b/AGENTS.md
index a06d530..3269b2c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,7 +11,13 @@
 1. **High-Level Clients** (`python_s7comm/sync_client.py`, `async_client.py`)
    - `Client` - Synchronous high-level API with string-based addresses
    - `AsyncClient` - Asynchronous high-level API with string-based addresses
-   - Provides convenience methods: `read_area()`, `write_area()`, `get_cpu_state()`, `get_order_code()`, etc.
+   - Provides convenience methods:
+     - `connect()`, `disconnect()`, `close()`
+     - `read_area()`, `write_area()`
+     - `read_multi_vars()`, `write_multi_vars()`
+     - `get_cpu_state()`, `get_order_code()`
+     - `read_szl()`, `read_szl_list()`
+     - `plc_stop()`
 
 2. **Core S7Comm** (`python_s7comm/s7comm/client.py`, `async_client.py`)
    - `S7Comm` - Synchronous core implementation
@@ -58,7 +64,7 @@ TCP/IP Socket
 
 ### General Rules
 
-- **Python 3.12+** required
+- **Python 3.12+** required (tested on 3.12 and 3.13)
 - **Line length**: 120 characters max (configured in ruff)
 - **Formatting**: Use `ruff format`
 - **Linting**: Use `ruff` for linting
@@ -209,7 +215,7 @@ Examples:
 ## Important Implementation Notes
 
 1. **PDU Reference**: Auto-incremented 16-bit counter for request/response matching
-2. **PDU Length**: Negotiated during connection setup (default 480 bytes)
+2. **PDU Length**: Negotiated during connection setup (default 480 bytes, max depends on PLC model)
 3. **Max Variables**: 20 items per multi-read/write operation (`MAX_VARS`)
 4. **Byte Order**: Big-endian (`!` in struct format) for protocol, some little-endian for PDU reference
 5. **Protocol ID**: Always `0x32` for S7comm
@@ -229,3 +235,11 @@ Examples:
 1. Add to relevant enums in `enums.py`
 2. Update `VariableAddress` regex patterns if needed
 3. Add tests in `test_addresses.py`
+
+## Release Process
+
+1. Update version in `pyproject.toml`
+2. Run all checks: `uv run pre-commit run --all-files`
+3. Run tests: `uv run pytest tests/ --ignore=tests/real_plc_s1200/`
+4. Create and push tag: `git tag -a v0.0.1 -m "v0.0.1" && git push origin v0.0.1`
+5. GitHub Actions will automatically build and publish to PyPI
diff --git a/pyproject.toml b/pyproject.toml
index 2a94569..99b7c4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,8 +1,33 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
 [project]
-name="python-s7comm"
-version="0.0.1"
+name = "python-s7comm"
+version = "0.0.1"
+description = "Unofficial Python implementation of Siemens S7 communication protocol"
+readme = "README.md"
 requires-python = ">=3.12"
 license = "MIT"
+authors = [
+    { name = "nikteliy" }
+]
+keywords = ["siemens", "s7", "plc", "s7comm", "automation", "industrial"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: System :: Hardware",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+
+[project.urls]
+Homepage = "https://github.com/nikteliy/python-s7comm"
+Repository = "https://github.com/nikteliy/python-s7comm"
+Issues = "https://github.com/nikteliy/python-s7comm/issues"
 
 [dependency-groups]
 test = [
diff --git a/src/python_s7comm/async_client.py b/src/python_s7comm/async_client.py
index c4c85d6..d016a73 100644
--- a/src/python_s7comm/async_client.py
+++ b/src/python_s7comm/async_client.py
@@ -1,5 +1,3 @@
-import datetime
-
 from .s7comm import AsyncS7Comm, enums
 from .s7comm.packets.variable_address import VariableAddress
 from .s7comm.szl import (
@@ -74,91 +72,8 @@ async def read_multi_vars(self, items: list[str]) -> list[bytes]:
         response = await self.s7comm.read_multi_vars(items=vars_)
         return response.values()
 
-    async def write_multi_vars(self, items: list[tuple[str, bytes]]) -> bool:
+    async def write_multi_vars(self, items: list[tuple[str, bytes]]) -> None:
         vars_ = [(VariableAddress.from_string(address), data) for address, data in items]
         response = await self.s7comm.write_multi_vars(items=vars_)
-        return response.check_result()
-
-    async def set_plc_system_datetime(self) -> int:
-        raise NotImplementedError
-
-    async def delete(self, block_type: str, block_num: int) -> int:
-        raise NotImplementedError
-
-    async def full_upload(self, _type: str, block_num: int) -> tuple[bytearray, int]:
-        raise NotImplementedError
-
-    async def upload(self, block_num: int) -> bytearray:
-        raise NotImplementedError
-
-    async def download(self, data: bytearray, block_num: int = -1) -> int:
-        raise NotImplementedError
-
-    async def db_get(self, db_number: int) -> bytearray:
-        raise NotImplementedError
-
-    async def get_cpu_info(self) -> None:
-        raise NotImplementedError
-
-    async def get_pg_block_info(self, block: bytearray) -> None:
-        raise NotImplementedError
-
-    async def get_protection(self) -> None:
-        raise NotImplementedError
-
-    async def iso_exchange_buffer(self, data: bytearray) -> bytearray:
-        raise NotImplementedError
-
-    async def list_blocks(self) -> None:
-        raise NotImplementedError
-
-    async def list_blocks_of_type(self, blocktype: str, size: int) -> None:
-        raise NotImplementedError
-
-    async def get_block_info(self, blocktype: str, db_number: int) -> None:
-        raise NotImplementedError
-
-    async def set_session_password(self, password: str) -> int:
-        raise NotImplementedError
-
-    async def clear_session_password(self) -> int:
-        raise NotImplementedError
-
-    async def set_connection_params(self, address: str, local_tsap: int, remote_tsap: int) -> None:
-        raise NotImplementedError
-
-    async def set_connection_type(self, connection_type: int) -> None:
-        raise NotImplementedError
-
-    async def compress(self, time: int) -> int:
-        raise NotImplementedError
-
-    async def set_param(self, number: int, value: int) -> int:
-        raise NotImplementedError
-
-    async def get_param(self, number: int) -> int:
-        raise NotImplementedError
-
-    async def plc_stop(self) -> None:
-        raise NotImplementedError
-
-    async def plc_cold_start(self) -> int:
-        raise NotImplementedError
-
-    async def plc_hot_start(self) -> int:
-        raise NotImplementedError
-
-    async def get_plc_datetime(self) -> None:
-        raise NotImplementedError
-
-    async def set_plc_datetime(self, datetime: datetime.datetime) -> int:
-        raise NotImplementedError
-
-    async def copy_ram_to_rom(self, timeout: int = 1) -> int:
-        raise NotImplementedError
-
-    async def db_fill(self, db_number: int, filler: int) -> int:
-        raise NotImplementedError
-
-    async def get_cp_info(self) -> None:
-        raise NotImplementedError
+        response.check_result()
+        return None
diff --git a/src/python_s7comm/s7comm/async_client.py b/src/python_s7comm/s7comm/async_client.py
index acf59aa..cf2e261 100644
--- a/src/python_s7comm/s7comm/async_client.py
+++ b/src/python_s7comm/s7comm/async_client.py
@@ -12,7 +12,6 @@
     S7AckDataHeader,
     S7Packet,
     SetupCommunicationRequest,
-    SZLResponseData,
     UserDataContinuationRequest,
     UserDataRequest,
     UserDataResponse,
@@ -152,12 +151,10 @@ async def write_area(self, address: VariableAddress, data: bytes) -> WriteVariab
             if not isinstance(response, WriteVariableResponse):
                 raise ValueError("Invalid response class")
             response.check_result()
-            # TODO: склеить все отдельные запросы в один общий изначальный и вернуть
+            # TODO: combine all separate requests into one common initial request and return
         return cast(WriteVariableResponse, response)
 
     async def read_multi_vars(self, items: list[VariableAddress]) -> ReadVariableResponse:
-        # Общий размер запроса, должен быть меньше pdu_length
-        # RPSize    = word(2 + ItemsCount * sizeof(TReqFunReadItem));
         if len(items) > self.MAX_VARS:
             raise ValueError("Too many items")
 
@@ -168,8 +165,6 @@ async def read_multi_vars(self, items: list[VariableAddress]) -> ReadVariableRes
         return response
 
     async def write_multi_vars(self, items: list[tuple[VariableAddress, bytes]]) -> WriteVariableResponse:
-        # Общий размер запроса, должен быть меньше pdu_length
-        # RPSize    = word(2 + ItemsCount * sizeof(TReqFunReadItem));
         if len(items) > self.MAX_VARS:
             raise ValueError("Too many items")
 
diff --git a/src/python_s7comm/s7comm/client.py b/src/python_s7comm/s7comm/client.py
index 7fa534c..8628c8a 100644
--- a/src/python_s7comm/s7comm/client.py
+++ b/src/python_s7comm/s7comm/client.py
@@ -44,9 +44,6 @@ def __init__(
             self.transport = transport
 
     def read_multi_vars(self, items: list[VariableAddress]) -> ReadVariableResponse:
-        # Общий размер запроса, должен быть меньше pdu_length
-        # RPSize    = word(2 + ItemsCount * sizeof(TReqFunReadItem)
-
         if len(items) > self.MAX_VARS:
             raise ValueError("Too many items")
 
@@ -57,8 +54,6 @@ def read_multi_vars(self, items: list[VariableAddress]) -> ReadVariableResponse:
         return response
 
     def write_multi_vars(self, items: list[tuple[VariableAddress, bytes]]) -> WriteVariableResponse:
-        # Общий размер запроса, должен быть меньше pdu_length
-        # RPSize    = word(2 + ItemsCount * sizeof(TReqFunReadItem));
         if len(items) > self.MAX_VARS:
             raise ValueError("Too many items")
 
@@ -101,7 +96,7 @@ def write_area(self, address: VariableAddress, data: bytes) -> WriteVariableResp
             if not isinstance(response, WriteVariableResponse):
                 raise ValueError("Invalid response class")
             response.check_result()
-            # TODO: склеить все отдельные запросы в один общий изначальный и вернуть
+            # TODO: combine all separate requests into one common initial request and return
         return cast(WriteVariableResponse, response)
 
     def connect(
diff --git a/src/python_s7comm/s7comm/enums.py b/src/python_s7comm/s7comm/enums.py
index 908ab9a..edb9165 100644
--- a/src/python_s7comm/s7comm/enums.py
+++ b/src/python_s7comm/s7comm/enums.py
@@ -94,7 +94,7 @@ class DataTypeTransportSize(Enum):
 
 
 class DataType(str, Enum):
-    BIT = "BOOL"  # Костыль для получения data_type из transport_size
+    BIT = "BOOL"  # Workaround for getting data_type from transport_size
     BOOL = "BOOL"
     BYTE = "BYTE"
     CHAR = "CHAR"
diff --git a/src/python_s7comm/s7comm/packets/packet.py b/src/python_s7comm/s7comm/packets/packet.py
index babb6fd..4ac7bad 100644
--- a/src/python_s7comm/s7comm/packets/packet.py
+++ b/src/python_s7comm/s7comm/packets/packet.py
@@ -1,4 +1,4 @@
-from typing import Any, ClassVar, Protocol, Self
+from typing import Any, ClassVar, Protocol
 
 from .headers import S7AckDataHeader, S7Header
 
diff --git a/src/python_s7comm/s7comm/packets/rw_variable.py b/src/python_s7comm/s7comm/packets/rw_variable.py
index 3b5e11b..c8e5df9 100644
--- a/src/python_s7comm/s7comm/packets/rw_variable.py
+++ b/src/python_s7comm/s7comm/packets/rw_variable.py
@@ -41,7 +41,7 @@ class RequestParameterItem:
     LENGTH = 12
 
     def __init__(self, address: VariableAddress, transport_size: ParameterTransportSize | None = None):
-        # word_size нуже для генератора пакетов
+        # word_size is required by the request_generator to calculate maximum elements per packet
         if transport_size is None:
             self.transport_size = ParameterTransportSize[address.data_type.value]
         else:
@@ -145,7 +145,17 @@ def serialize(self) -> bytes:
         return self.parameter.serialize()
 
     def request_generator(self, pdu_length: int) -> Generator["VariableReadRequest", None, None]:
-        """Генератор который разбивает запрос на более мелкие запросы, которы умещаются в pdu_length"""
+        """Generate multiple read requests that fit within the PDU length limit.
+
+        Splits a large read request into smaller chunks based on the maximum
+        payload size allowed by the negotiated PDU length.
+
+        Args:
+            pdu_length: Maximum PDU size negotiated during connection setup.
+
+        Yields:
+            VariableReadRequest: Individual requests sized to fit within pdu_length.
+        """
         fixed_packet_part = S7AckDataHeader.LENGTH + VariableRequestParameter.LENGTH + DataItem.HEADER_LENGTH
         max_payload_length = pdu_length - fixed_packet_part
         parameter_item = self.parameter.items[0]
@@ -228,7 +238,17 @@ def _create_data_item(cls, parameter_item: RequestParameterItem, data: bytes) ->
         return DataItem(transport_size=data_transport_size, data_length=data_length, data=data)
 
     def request_generator(self, pdu_length: int) -> Generator["VariableWriteRequest", None, None]:
-        """Генератор который разбивает запрос на более мелкие запросы, которы умещаются в pdu_length"""
+        """Generate multiple write requests that fit within the PDU length limit.
+
+        Splits a large write request into smaller chunks based on the maximum
+        payload size allowed by the negotiated PDU length.
+
+        Args:
+            pdu_length: Maximum PDU size negotiated during connection setup.
+
+        Yields:
+            VariableWriteRequest: Individual requests sized to fit within pdu_length.
+        """
         max_payload_length = (
             pdu_length
             - S7Header.LENGTH
@@ -348,7 +368,14 @@ def parse(cls, packet: bytes) -> "ReadVariableResponse":
         return cls(parameter=parameter, data=items)
 
     def values(self) -> list[bytes]:
-        """Возвращает только значения в виде списка, после проверки на результат ответа"""
+        """Extract and return data values from the response.
+
+        Returns:
+            list[bytes]: List of raw data bytes from each response item.
+
+        Raises:
+            ReadVariableException: If any item in the response has a non-success return code.
+        """
         result = []
         for item in self.data:
             if item.return_code != ItemReturnCode.SUCCESS:
@@ -385,9 +412,13 @@ def serialize_parameter(self) -> bytes:
     def serialize_data(self) -> bytes:
         return struct.pack(f"!{len(self.data)}B", *self.data)
 
-    def check_result(self) -> bool:
-        """Проверяет значения каждой из записей и возвращает True, если все записалось успешно"""
+    def check_result(self) -> None:
+        """Check the result of each write operation.
+
+        Raises:
+            WriteVariableException: If any item in the response has a non-success return code.
+        """
         for item in self.data:
             if item != ItemReturnCode.SUCCESS:
                 raise WriteVariableException(f"WriteVariableResponseItem return code: {item}", response=self)
-        return True
+        return None
diff --git a/src/python_s7comm/s7comm/packets/user_data.py b/src/python_s7comm/s7comm/packets/user_data.py
index f366d85..7ac74fe 100644
--- a/src/python_s7comm/s7comm/packets/user_data.py
+++ b/src/python_s7comm/s7comm/packets/user_data.py
@@ -1,5 +1,3 @@
-"""Скорее всего общие объекты для всех запросов типа UserData"""
-
 import struct
 
 from ..enums import (
diff --git a/src/python_s7comm/s7comm/packets/variable_address.py b/src/python_s7comm/s7comm/packets/variable_address.py
index f4c36d8..6821d81 100644
--- a/src/python_s7comm/s7comm/packets/variable_address.py
+++ b/src/python_s7comm/s7comm/packets/variable_address.py
@@ -30,9 +30,8 @@
 
 @dataclass
 class VariableAddress:
-    """data_type=None на случай парсинга из ответа, возможно стоит вынести в отдельный класс VariableAddresResponse
-    Потому что в ответе нет data_typе, или может вообще убрать datatype
-    """
+    # TODO: data_type=None is for parsing from response, consider moving to a separate VariableAddressResponse class
+    # because the response doesn't contain data_type, or maybe remove datatype entirely
 
     area: Area
     db_number: int
diff --git a/src/python_s7comm/sync_client.py b/src/python_s7comm/sync_client.py
index 29807f4..e1263e9 100644
--- a/src/python_s7comm/sync_client.py
+++ b/src/python_s7comm/sync_client.py
@@ -1,5 +1,3 @@
-import datetime
-
 from .s7comm import S7Comm, enums
 from .s7comm.packets import S7Packet
 from .s7comm.packets.variable_address import VariableAddress
@@ -80,91 +78,10 @@ def read_multi_vars(self, items: list[str]) -> list[bytes]:
         response = self.s7comm.read_multi_vars(items=items_)
         return response.values()
 
-    def write_multi_vars(self, items: list[tuple[str, bytes]]) -> bool:
+    def write_multi_vars(self, items: list[tuple[str, bytes]]) -> None:
         vars_ = [(VariableAddress.from_string(address), data) for address, data in items]
         response = self.s7comm.write_multi_vars(items=vars_)
-        return response.check_result()
+        response.check_result()
 
     def plc_stop(self) -> None:
         self.s7comm.plc_stop()
-
-    def set_plc_system_datetime(self) -> int:
-        raise NotImplementedError
-
-    def delete(self, block_type: str, block_num: int) -> int:
-        raise NotImplementedError
-
-    def full_upload(self, _type: str, block_num: int) -> tuple[bytearray, int]:
-        raise NotImplementedError
-
-    def upload(self, block_num: int) -> bytearray:
-        raise NotImplementedError
-
-    def download(self, data: bytearray, block_num: int = -1) -> int:
-        raise NotImplementedError
-
-    def db_get(self, db_number: int) -> bytearray:
-        raise NotImplementedError
-
-    def get_cpu_info(self) -> None:
-        raise NotImplementedError
-
-    def get_pg_block_info(self, block: bytearray) -> None:
-        raise NotImplementedError
-
-    def get_protection(self) -> None:
-        raise NotImplementedError
-
-    def iso_exchange_buffer(self, data: bytearray) -> bytearray:
-        raise NotImplementedError
-
-    def list_blocks(self) -> None:
-        raise NotImplementedError
-
-    def list_blocks_of_type(self, blocktype: str, size: int) -> None:
-        raise NotImplementedError
-
-    def get_block_info(self, blocktype: str, db_number: int) -> None:
-        raise NotImplementedError
-
-    def set_session_password(self, password: str) -> int:
-        raise NotImplementedError
-
-    def clear_session_password(self) -> int:
-        raise NotImplementedError
-
-    def set_connection_params(self, address: str, local_tsap: int, remote_tsap: int) -> None:
-        raise NotImplementedError
-
-    def set_connection_type(self, connection_type: int) -> None:
-        raise NotImplementedError
-
-    def compress(self, time: int) -> int:
-        raise NotImplementedError
-
-    def set_param(self, number: int, value: int) -> int:
-        raise NotImplementedError
-
-    def get_param(self, number: int) -> int:
-        raise NotImplementedError
-
-    def plc_cold_start(self) -> int:
-        raise NotImplementedError
-
-    def plc_hot_start(self) -> int:
-        raise NotImplementedError
-
-    def get_plc_datetime(self) -> None:
-        raise NotImplementedError
-
-    def set_plc_datetime(self, datetime: datetime.datetime) -> int:
-        raise NotImplementedError
-
-    def copy_ram_to_rom(self, timeout: int = 1) -> int:
-        raise NotImplementedError
-
-    def db_fill(self, db_number: int, filler: int) -> int:
-        raise NotImplementedError
-
-    def get_cp_info(self) -> None:
-        raise NotImplementedError
diff --git a/tests/real_plc_s1200/test_async_write_area.py b/tests/real_plc_s1200/test_async_write_area.py
index 3b80802..31ecb9a 100644
--- a/tests/real_plc_s1200/test_async_write_area.py
+++ b/tests/real_plc_s1200/test_async_write_area.py
@@ -115,7 +115,6 @@ async def test_write_multi_vars(async_client: AsyncClient) -> None:
         b"\x00",
     ]
     items = list(zip(addresses, expected))
-    response = await async_client.write_multi_vars(items=items)
-    assert response
+    await async_client.write_multi_vars(items=items)
 
     assert await async_client.read_multi_vars(items=addresses) == expected
diff --git a/tests/real_plc_s1200/test_write_area.py b/tests/real_plc_s1200/test_write_area.py
index 5d07839..8c5312d 100644
--- a/tests/real_plc_s1200/test_write_area.py
+++ b/tests/real_plc_s1200/test_write_area.py
@@ -106,7 +106,6 @@ def test_write_multi_vars(client: Client) -> None:
         b"\x00",
     ]
     items = list(zip(addresses, expected))
-    response = client.write_multi_vars(items=items)
-    assert response
+    client.write_multi_vars(items=items)
 
     assert client.read_multi_vars(items=addresses) == expected
diff --git a/uv.lock b/uv.lock
index 1425d7e..704d5f0 100644
--- a/uv.lock
+++ b/uv.lock
@@ -273,7 +273,7 @@ wheels = [
 [[package]]
 name = "python-s7comm"
 version = "0.0.1"
-source = { virtual = "." }
+source = { editable = "." }
 
 [package.dev-dependencies]
 dev = [