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diff --git a/src/langbot/pkg/platform/sources/espl.py b/src/langbot/pkg/platform/sources/espl.py
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+"""ESPL V3 adapter — WebSocket server for E-SP-Line2's Adapter Gateway (接入器).
+
+LangBot acts as a server-mode WebSocket endpoint. E-SP-Line2's adapter (接入器)
+in **client mode** connects to this endpoint (or a reverse proxy forwards it)
+and exchanges e-commerce messages:
+
+* **Inbound**  — E-SP-Line2 broadcasts ``message.received`` envelopes to every
+  connected adapter client. This adapter converts each envelope into a LangBot
+  ``FriendMessage`` / ``GroupMessage`` event (the ``conversation_id`` maps to
+  the LangBot launcher/session id) and fires it into the normal pipeline.
+* **Outbound** — every ``reply_message`` / ``reply_message_chunk`` the pipeline
+  emits is converted into an ESPL v3 outbound ``message`` frame
+  (``command_type: send_text``) and sent back over the WebSocket that carries
+  the matching conversation.
+
+Design notes:
+
+* Listens on ``ws://<host>:<port>/ws`` (default ``ws://127.0.0.1:8000/ws``).
+  In E-SP-Line2 create a **client-mode** 接入器 with ``ws_url`` pointing here.
+* Supports multiple simultaneous E-SP-Line2 connections. Each connection is
+  identified by its ``adapter_id`` (from the ``key``/path) so outbound replies
+  route back to the correct connection.
+* Heartbeats: responds to ``ping`` frames with ``pong``; the E-SP-Line2
+  gateway also sends server pings that we answer automatically via the
+  websockets library.
+* The ``conversation_id`` from the inbound envelope is used as the LangBot
+  launcher id so each e-commerce conversation maps 1:1 to an isolated LangBot
+  session. Replies are routed back to the same ``conversation_id``.
+* ``instance_id`` is captured from the inbound envelope and stashed on the
+  event's ``source_platform_object``.
+
+See docs/user-guide/adapter-gateway.md in the E-SP-Line2 repo for the full
+ESPL v3 protocol reference.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import time
+import typing
+import uuid
+from datetime import datetime
+
+import pydantic
+import websockets
+
+import langbot_plugin.api.definition.abstract.platform.adapter as abstract_platform_adapter
+import langbot_plugin.api.entities.builtin.platform.message as platform_message
+import langbot_plugin.api.entities.builtin.platform.events as platform_events
+import langbot_plugin.api.entities.builtin.platform.entities as platform_entities
+import langbot_plugin.api.definition.abstract.platform.event_logger as abstract_platform_logger
+
+logger = logging.getLogger(__name__)
+
+# Default listen host / port (E-SP-Line2 client-mode 接入器 connects here).
+_DEFAULT_HOST = '127.0.0.1'
+_DEFAULT_PORT = 8000
+# Default heartbeat ping interval (seconds).
+_DEFAULT_HEARTBEAT_INTERVAL = 30
+# Max inbound frame size (1MB, matches E-SP-Line2 gateway).
+_MAX_MESSAGE_SIZE = 1 * 1024 * 1024
+
+
+class _EsplConnection:
+    """A single connected E-SP-Line2 adapter gateway client.
+
+    Holds the WebSocket plus the routing info needed to reply.
+    """
+
+    def __init__(self, ws, adapter_id: str = ''):
+        self.ws = ws
+        self.adapter_id = adapter_id
+        self.send_lock = asyncio.Lock()
+
+    async def send_frame(self, frame: dict) -> None:
+        async with self.send_lock:
+            await self.ws.send(json.dumps(frame, ensure_ascii=False))
+
+
+class EsplAdapter(abstract_platform_adapter.AbstractMessagePlatformAdapter):
+    """ESPL V3 WebSocket server adapter (LangBot is the server)."""
+
+    bot_uuid: str = pydantic.Field(default='', exclude=True)
+
+    listeners: dict[
+        typing.Type[platform_events.Event],
+        typing.Callable[[platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], None],
+    ] = pydantic.Field(default_factory=dict, exclude=True)
+
+    # WebSocket server state (excluded from pydantic serialization).
+    server: typing.Any = pydantic.Field(default=None, exclude=True)
+    running: bool = pydantic.Field(default=False, exclude=True)
+    connections: dict[str, '_EsplConnection'] = pydantic.Field(default_factory=dict, exclude=True)
+    inbound_tasks: set[asyncio.Task] = pydantic.Field(default_factory=set, exclude=True)
+    heartbeat_task: asyncio.Task | None = pydantic.Field(default=None, exclude=True)
+
+    model_config = pydantic.ConfigDict(arbitrary_types_allowed=True)
+
+    def __init__(self, config: dict, logger: abstract_platform_logger.AbstractEventLogger, **kwargs):
+        super().__init__(config=config, logger=logger, **kwargs)
+        self.bot_account_id = 'espl'
+        self.listeners = {}
+        self.server = None
+        self.running = False
+        self.connections = {}
+        self.inbound_tasks = set()
+        self.heartbeat_task = None
+
+    # -- framework hooks ------------------------------------------------------
+
+    def set_bot_uuid(self, bot_uuid: str) -> None:
+        """Called by the bot manager so the adapter knows its own bot uuid."""
+        object.__setattr__(self, 'bot_uuid', bot_uuid)
+
+    def get_launcher_id(self, event: platform_events.MessageEvent) -> str:
+        """Map an inbound event to a LangBot launcher id.
+
+        We use the e-commerce ``conversation_id`` (stashed on the sender id at
+        inbound time) so each conversation maps 1:1 to an isolated LangBot
+        session.
+        """
+        if isinstance(event, platform_events.GroupMessage):
+            return str(event.sender.group.id)
+        return str(event.sender.id)
+
+    def register_listener(
+        self,
+        event_type: typing.Type[platform_events.Event],
+        func: typing.Callable[
+            [platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], typing.Awaitable[None]
+        ],
+    ):
+        self.listeners[event_type] = func
+
+    def unregister_listener(
+        self,
+        event_type: typing.Type[platform_events.Event],
+        func: typing.Callable[
+            [platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], typing.Awaitable[None]
+        ],
+    ):
+        self.listeners.pop(event_type, None)
+
+    async def is_muted(self, group_id: int) -> bool:
+        return False
+
+    async def is_stream_output_supported(self) -> bool:
+        return False
+
+    # -- server lifecycle -----------------------------------------------------
+
+    async def run_async(self):
+        """Start the WebSocket server and serve forever."""
+        host = str(self.config.get('host', _DEFAULT_HOST))
+        port = int(self.config.get('port', _DEFAULT_PORT))
+        self.running = True
+
+        self.server = await websockets.serve(
+            self._handle_connection,
+            host,
+            port,
+            ping_interval=None,  # we manage heartbeats ourselves
+            max_size=_MAX_MESSAGE_SIZE,
+        )
+        await self.logger.info(f'ESPL adapter listening on ws://{host}:{port}/ws')
+
+        self.heartbeat_task = asyncio.create_task(self._heartbeat_loop())
+
+        try:
+            # Serve forever; run_async is expected to stay alive.
+            while self.running:
+                await asyncio.sleep(3600)
+        except asyncio.CancelledError:
+            raise
+        finally:
+            if self.server is not None:
+                self.server.close()
+                await self.server.wait_closed()
+                self.server = None
+
+    async def kill(self) -> bool:
+        """Stop the server and close all connections."""
+        self.running = False
+        if self.heartbeat_task is not None and not self.heartbeat_task.done():
+            self.heartbeat_task.cancel()
+            self.heartbeat_task = None
+        for task in list(self.inbound_tasks):
+            if not task.done():
+                task.cancel()
+        self.inbound_tasks.clear()
+        for conn in list(self.connections.values()):
+            try:
+                await conn.ws.close()
+            except Exception:
+                pass
+        self.connections.clear()
+        return True
+
+    # -- connection handler ---------------------------------------------------
+
+    async def _handle_connection(self, ws):
+        """Handle a new WebSocket connection from an E-SP-Line2 gateway client.
+
+        The E-SP-Line2 client-mode adapter connects with ``?key=<KEY>`` in the
+        query string.  If the adapter has been configured with a non-empty
+        ``key``, this method **rejects** connections that do not present a
+        matching key (close code 1008 — policy violation).
+
+        Note: websockets >= 14 removed the ``path`` / ``query_string``
+        attributes from the connection object.  The request path (including
+        the query string) is available via ``ws.request.path``.
+        """
+        # In websockets >= 14 the request path (with query string) lives on
+        # ``ws.request.path`` (e.g. ``/ws?key=abc``).  Fall back to the legacy
+        # ``ws.path`` / ``ws.query_string`` attributes for older versions.
+        request = getattr(ws, 'request', None)
+        if request is not None:
+            raw_path = str(getattr(request, 'path', '') or '')
+        else:
+            raw_path = str(getattr(ws, 'path', '') or '')
+        path, _, query = raw_path.partition('?')
+
+        # ── Key authentication ──────────────────────────────────────────
+        expected_key = str(self.config.get('key') or '')
+        provided_key = self._extract_key(query)
+        if expected_key:
+            if not provided_key:
+                await self.logger.warning(
+                    f'ESPL adapter key missing; closing connection from {raw_path}'
+                )
+                await ws.close(1008, 'Unauthorized: key missing')
+                return
+            if provided_key != expected_key:
+                await self.logger.warning(
+                    f'ESPL adapter key mismatch; closing connection from {raw_path}'
+                )
+                await ws.close(1008, 'Unauthorized: invalid key')
+                return
+
+        # ── Identify the connection for routing ─────────────────────────
+        adapter_id = self._extract_adapter_id(path, query)
+
+        conn = _EsplConnection(ws, adapter_id=adapter_id)
+        conn_key = adapter_id or ('conn_' + uuid.uuid4().hex)
+        self.connections[conn_key] = conn
+
+        await self.logger.info(
+            f'ESPL adapter client connected: adapter_id={adapter_id or "(client-mode, no adapter-id in path)"} '
+            f'path={raw_path}'
+        )
+
+        # ── Send the connected handshake ────────────────────────────────
+        try:
+            await conn.send_frame(
+                {
+                    'type': 'connected',
+                    'id': uuid.uuid4().hex,
+                    'timestamp': int(time.time() * 1000),
+                    'adapter_id': adapter_id or '',
+                    'gateway_version': 'v3',
+                    'session_id': conn_key,
+                    'adapter_name': self.config.get('name', 'ESPL'),
+                    'platform': self.config.get('platform', ''),
+                }
+            )
+        except Exception as e:
+            await self.logger.warning(f'ESPL adapter handshake failed: {e}')
+            self.connections.pop(conn_key, None)
+            return
+
+        # ── Read loop ───────────────────────────────────────────────────
+        try:
+            async for raw in ws:
+                try:
+                    frame = json.loads(raw)
+                except (json.JSONDecodeError, ValueError):
+                    await self.logger.warning(f'ESPL adapter received non-JSON frame: {raw[:200]}')
+                    continue
+                await self._handle_frame(conn, frame)
+        except websockets.exceptions.ConnectionClosed as e:
+            await self.logger.info(f'ESPL adapter client disconnected: {e.code} {e.reason}')
+        except asyncio.CancelledError:
+            raise
+        except Exception as e:
+            await self.logger.warning(f'ESPL adapter connection error: {e}')
+        finally:
+            self.connections.pop(conn_key, None)
+
+    @staticmethod
+    def _extract_adapter_id(path: str, query: str) -> str:
+        """Extract the adapter id from the connection path.
+
+        E-SP-Line2 client mode may connect to /ws/adapter-gateway/<id>?key=...
+        or a custom path /custom?key=... The adapter id is extracted from the
+        path segment, NOT from the key query parameter.
+        """
+        path_part = path.split('?', 1)[0]
+        if '/ws/adapter-gateway/' in path_part:
+            maybe_id = path_part.rsplit('/', 1)[-1]
+            if maybe_id and maybe_id not in ('ws', 'adapter-gateway'):
+                return maybe_id
+        # No adapter id in the path; return empty string (anonymous connection).
+        return ''
+
+    @staticmethod
+    def _extract_key(query: str) -> str:
+        """Extract the ``key`` query parameter from the WebSocket query string.
+
+        E-SP-Line2 client-mode adapter passes the access key as
+        ``?key=<KEY>`` in the WebSocket URL (see ``client_connector.go``
+        line 172-177).
+        """
+        for pair in query.split('&'):
+            if '=' in pair:
+                k, v = pair.split('=', 1)
+                if k == 'key':
+                    return v
+        return ''
+
+    async def _handle_frame(self, conn: _EsplConnection, frame: dict) -> None:
+        """Handle a single inbound frame from an E-SP-Line2 gateway client."""
+        msg_type = frame.get('type', '')
+        if msg_type == 'ping':
+            await conn.send_frame({'type': 'pong', 'timestamp': int(time.time() * 1000)})
+            return
+        if msg_type == 'pong':
+            return
+        if msg_type == 'ack':
+            return
+        if msg_type == 'error':
+            await self.logger.warning(f'ESPL adapter gateway error: {frame.get("code")} {frame.get("message")}')
+            return
+
+        # Inbound message envelope (message.received).
+        if frame.get('event_type') == 'message.received':
+            await self._handle_inbound_message(conn, frame)
+            return
+
+        await self.logger.debug(f'ESPL adapter unhandled frame type: {msg_type}')
+
+    def _start_inbound_task(self, coro) -> asyncio.Task | None:
+        self.inbound_tasks = {task for task in self.inbound_tasks if not task.done()}
+        task = asyncio.create_task(coro)
+        self.inbound_tasks.add(task)
+
+        def task_done(done_task: asyncio.Task) -> None:
+            self.inbound_tasks.discard(done_task)
+            if not done_task.cancelled():
+                done_task.exception()
+
+        task.add_done_callback(task_done)
+        return task
+
+    async def _handle_inbound_message(self, conn: _EsplConnection, envelope: dict) -> None:
+        """Convert a message.received envelope into a LangBot event and fire it."""
+        payload = envelope.get('payload') or {}
+        if not isinstance(payload, dict):
+            await self.logger.warning('ESPL adapter inbound payload is not an object')
+            return
+
+        conversation_id = str(payload.get('conversation_id') or '')
+        sender_id = str(payload.get('sender_id') or '')
+        sender_name = str(payload.get('sender_name') or 'User')
+        message_content = str(payload.get('message_content') or '')
+        instance_id = str(payload.get('instance') or payload.get('instance_id') or '')
+        platform = str(payload.get('platform_id') or envelope.get('platform') or '')
+
+        if not conversation_id:
+            await self.logger.warning('ESPL adapter inbound message missing conversation_id')
+            return
+
+        chain = self._build_message_chain(payload.get('message_chain'), message_content)
+
+        # Stash routing context (instance_id, conversation_id, conn_key) on the
+        # event so outbound replies route back to the correct connection.
+        source_platform_object = {
+            'instance_id': instance_id,
+            'conversation_id': conversation_id,
+            'platform': platform,
+            'sender_id': sender_id,
+            '_conn': conn,
+        }
+
+        session_type = str(payload.get('session_type') or 'person')
+        if session_type == 'group':
+            group = platform_entities.Group(
+                id=conversation_id,
+                name=str(payload.get('group_name') or conversation_id),
+                permission=platform_entities.Permission.Member,
+            )
+            sender = platform_entities.GroupMember(
+                id=sender_id or conversation_id,
+                member_name=sender_name,
+                group=group,
+                permission=platform_entities.Permission.Member,
+            )
+            event = platform_events.GroupMessage(
+                sender=sender,
+                message_chain=chain,
+                time=datetime.now().timestamp(),
+                source_platform_object=source_platform_object,
+            )
+        else:
+            sender = platform_entities.Friend(
+                id=conversation_id,
+                nickname=sender_name,
+                remark=sender_name,
+            )
+            event = platform_events.FriendMessage(
+                sender=sender,
+                message_chain=chain,
+                time=datetime.now().timestamp(),
+                source_platform_object=source_platform_object,
+            )
+
+        listener = self.listeners.get(type(event))
+        if listener is None:
+            await self.logger.warning(f'ESPL adapter no listener for {type(event).__name__}')
+            return
+
+        await self.logger.info(
+            f'ESPL adapter inbound: conversation={conversation_id} sender={sender_name} '
+            f'content={message_content[:100]}'
+        )
+        self._start_inbound_task(listener(event, self))
+
+    def _build_message_chain(
+        self,
+        message_chain: typing.Any,
+        fallback_text: str,
+    ) -> platform_message.MessageChain:
+        """Convert an ESPL message_chain into a LangBot MessageChain."""
+        components: list[platform_message.MessageComponent] = []
+        if isinstance(message_chain, list):
+            for elem in message_chain:
+                if not isinstance(elem, dict):
+                    continue
+                elem_type = elem.get('type', '')
+                content = elem.get('content')
+                if elem_type == 'text':
+                    text = ''
+                    if isinstance(content, dict):
+                        text = str(content.get('text', ''))
+                    elif isinstance(content, str):
+                        text = content
+                    else:
+                        text = str(elem.get('text', ''))
+                    if text:
+                        components.append(platform_message.Plain(text=text))
+                elif elem_type == 'image':
+                    url = ''
+                    if isinstance(content, dict):
+                        url = str(content.get('url', ''))
+                    elif isinstance(content, str):
+                        url = content
+                    else:
+                        url = str(elem.get('url', ''))
+                    if url:
+                        components.append(platform_message.Image(url=url))
+                elif elem_type in ('item', 'product', 'goods'):
+                    # E-commerce product card (e.g. 闲鱼 itemInfo).
+                    # Render as a plain-text description so the product info
+                    # (title/price) is not dropped downstream.
+                    title = ''
+                    price = ''
+                    if isinstance(content, dict):
+                        title = str(content.get('title') or '')
+                        price = str(content.get('price') or '')
+                    elif isinstance(content, str):
+                        title = content
+                    else:
+                        title = str(elem.get('title') or '')
+                        price = str(elem.get('price') or '')
+                    product_text = title
+                    if price:
+                        product_text = f'{title} [价格: {price}]' if title else f'价格: {price}'
+                    if product_text:
+                        components.append(platform_message.Plain(text=product_text))
+        if not components and fallback_text:
+            components.append(platform_message.Plain(text=fallback_text))
+        return platform_message.MessageChain(components)
+
+    # -- outbound -------------------------------------------------------------
+
+    async def send_message(self, target_type: str, target_id: str, message: platform_message.MessageChain) -> dict:
+        """Proactively push a message to a conversation (target_id == conversation_id)."""
+        return await self._emit_outbound(target_id, message)
+
+    async def reply_message(
+        self,
+        message_source: platform_events.MessageEvent,
+        message: platform_message.MessageChain,
+        quote_origin: bool = False,
+    ) -> dict:
+        return await self._emit_outbound_from_event(message_source, message)
+
+    async def reply_message_chunk(
+        self,
+        message_source: platform_events.MessageEvent,
+        bot_message,
+        message: platform_message.MessageChain,
+        quote_origin: bool = False,
+        is_final: bool = False,
+    ) -> dict:
+        # ESPL v3 has no streaming; send the whole chunk as a final message.
+        return await self._emit_outbound_from_event(message_source, message)
+
+    async def _emit_outbound_from_event(
+        self,
+        message_source: platform_events.MessageEvent,
+        message: platform_message.MessageChain,
+    ) -> dict:
+        """Send a reply, routing back to the connection captured at inbound."""
+        source = getattr(message_source, 'source_platform_object', None) or {}
+        conn = source.get('_conn')
+        conversation_id = str(source.get('conversation_id') or '')
+        instance_id = str(source.get('instance_id') or '')
+        sender_id = str(source.get('sender_id') or '')
+        if not conversation_id:
+            conversation_id = str(self.get_launcher_id(message_source))
+        return await self._emit_outbound(
+            conversation_id,
+            message,
+            instance_id=instance_id,
+            sender_id=sender_id,
+            conn=conn,
+        )
+
+    async def _emit_outbound(
+        self,
+        conversation_id: str,
+        message: platform_message.MessageChain,
+        instance_id: str = '',
+        sender_id: str = '',
+        conn: _EsplConnection | None = None,
+    ) -> dict:
+        """Build and send an ESPL v3 outbound message frame."""
+        if conn is None:
+            # Try to find a connection for this conversation by scanning.
+            if not self.connections:
+                await self.logger.warning('ESPL adapter no connections; dropping outbound message')
+                return {}
+            conn = next(iter(self.connections.values()))
+
+        # Convert the LangBot message chain to ESPL chain elements.
+        chain = []
+        for component in message:
+            if isinstance(component, platform_message.Plain):
+                chain.append({'type': 'text', 'content': {'text': component.text}})
+            elif isinstance(component, platform_message.Image):
+                chain.append({'type': 'image', 'content': {'url': component.url or ''}})
+
+        frame = {
+            'type': 'message',
+            'id': 'out_' + uuid.uuid4().hex,
+            'timestamp': int(time.time() * 1000),
+            'payload': {
+                'instance_id': instance_id,
+                'command_type': 'send_text',
+                'conversation_id': conversation_id,
+                'target_id': sender_id or conversation_id,
+                'sender_id': sender_id,
+                'message_chain': chain,
+            },
+        }
+        try:
+            await conn.send_frame(frame)
+        except Exception as e:
+            await self.logger.error(f'ESPL adapter failed to send outbound: {e}')
+            return {}
+        await self.logger.info(f'ESPL adapter outbound: conversation={conversation_id} chain={chain}')
+        return frame
+
+    # -- heartbeat ------------------------------------------------------------
+
+    async def _heartbeat_loop(self) -> None:
+        """Periodically ping all connected clients to keep connections alive."""
+        interval = int(self.config.get('heartbeat_interval', _DEFAULT_HEARTBEAT_INTERVAL))
+        while self.running:
+            await asyncio.sleep(interval)
+            for conn in list(self.connections.values()):
+                try:
+                    await conn.send_frame({'type': 'ping', 'timestamp': int(time.time() * 1000)})
+                except Exception as e:
+                    await self.logger.warning(f'ESPL adapter heartbeat to client failed: {e}')
diff --git a/src/langbot/pkg/platform/sources/espl.yaml b/src/langbot/pkg/platform/sources/espl.yaml
new file mode 100644
index 000000000..5ccbc5311
--- /dev/null
+++ b/src/langbot/pkg/platform/sources/espl.yaml
@@ -0,0 +1,83 @@
+apiVersion: v1
+kind: MessagePlatformAdapter
+metadata:
+  name: espl
+  label:
+    en_US: ESPL V3
+    zh_Hans: ESPL V3
+    zh_Hant: ESPL V3
+    ja_JP: ESPL V3
+  description:
+    en_US: "LangBot acts as a WebSocket server. E-SP-Line2 creates a client-mode adapter (接入器) pointing its ws_url to this endpoint. Receives e-commerce messages (Taobao / Xianyu) as inbound events and sends AI replies back to the platform."
+    zh_Hans: "LangBot 作为 WebSocket 服务端。在 E-SP-Line2 中创建客户端模式接入器，将 ws_url 指向本端点即可接入。接收电商平台（淘宝/闲鱼）消息作为入站事件，并将 AI 回复发回平台。"
+    zh_Hant: "LangBot 作為 WebSocket 服務端。在 E-SP-Line2 中建立用戶端模式接入器，將 ws_url 指向本端點即可接入。接收電商平台（淘寶/閒魚）訊息作為入站事件，並將 AI 回覆發回平台。"
+    ja_JP: "LangBot が WebSocket サーバーとして動作します。E-SP-Line2 でクライアントモードのアダプター（接入器）を作成し、ws_url をこのエンドポイントに向けます。EC プラットフォーム（Taobao / Xianyu）のメッセージをインバウンドイベントとして受信し、AI 返信をプラットフォームに送り返します。"
+  icon: espl.png
+spec:
+  categories:
+    - global
+  help_links:
+    zh: https://docs.langbot.app/zh/platforms/espl
+    en: https://docs.langbot.app/en/platforms/espl
+    ja: https://docs.langbot.app/ja/platforms/espl
+  config:
+    - name: host
+      label:
+        en_US: Listen Host
+        zh_Hans: 监听主机
+        zh_Hant: 監聽主機
+        ja_JP: リッスンホスト
+      description:
+        en_US: "Host to bind the WebSocket server. Set 0.0.0.0 when E-SP-Line2 is on another machine."
+        zh_Hans: "WebSocket 服务端绑定的主机。E-SP-Line2 在其他机器时设为 0.0.0.0。"
+        zh_Hant: "WebSocket 服務端綁定的主機。E-SP-Line2 在其他機器時設為 0.0.0.0。"
+        ja_JP: "WebSocket サーバーをバインドするホスト。E-SP-Line2 が別マシンの場合は 0.0.0.0 を設定します。"
+      type: string
+      required: true
+      default: "127.0.0.1"
+    - name: port
+      label:
+        en_US: Listen Port
+        zh_Hans: 监听端口
+        zh_Hant: 監聽連接埠
+        ja_JP: リッスンポート
+      description:
+        en_US: "Port to bind the WebSocket server. E-SP-Line2 client-mode adapter connects to ws://<host>:<port>/ws."
+        zh_Hans: "WebSocket 服务端绑定的端口。E-SP-Line2 客户端模式接入器连接 ws://<host>:<port>/ws。"
+        zh_Hant: "WebSocket 服務端綁定的連接埠。E-SP-Line2 用戶端模式接入器連接 ws://<host>:<port>/ws。"
+        ja_JP: "WebSocket サーバーをバインドするポート。E-SP-Line2 クライアントモードアダプターは ws://<host>:<port>/ws に接続します。"
+      type: integer
+      required: false
+      default: 8000
+    - name: key
+      label:
+        en_US: Access Key
+        zh_Hans: 访问密钥
+        zh_Hant: 訪問密鑰
+        ja_JP: アクセスキー
+      description:
+        en_US: "Access key for authentication. E-SP-Line2 client-mode adapter passes this key as ?key=<KEY> in the WebSocket URL. Leave empty to disable key validation (not recommended)."
+        zh_Hans: "访问密钥用于认证。E-SP-Line2 客户端模式接入器在 WebSocket URL 中携带 ?key=<KEY> 传递此密钥。留空表示不验证密钥（不推荐）。"
+        zh_Hant: "訪問密鑰用於認證。E-SP-Line2 用戶端模式接入器在 WebSocket URL 中攜帶 ?key=<KEY> 傳遞此密鑰。留空表示不驗證密鑰（不推薦）。"
+        ja_JP: "認証用のアクセスキー。E-SP-Line2 クライアントモードアダプターは WebSocket URL に ?key=<KEY> としてこのキーを渡します。空の場合はキー検証を無効にします（非推奨）。"
+      type: string
+      required: false
+      default: ""
+    - name: heartbeat_interval
+      label:
+        en_US: Heartbeat Interval (seconds)
+        zh_Hans: 心跳间隔（秒）
+        zh_Hant: 心跳間隔（秒）
+        ja_JP: ハートビート間隔（秒）
+      description:
+        en_US: "How often to ping connected clients to keep the connection alive."
+        zh_Hans: "发送 ping 帧保持连接的间隔。"
+        zh_Hant: "發送 ping 幀保持連線的間隔。"
+        ja_JP: "接続を維持するためにクライアントに ping を送信する間隔。"
+      type: integer
+      required: false
+      default: 30
+execution:
+  python:
+    path: ./espl.py
+    attr: EsplAdapter