diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..e6058f8
--- /dev/null
+++ b/__init__.py
@@ -0,0 +1,123 @@
+"""
+Rocket.Chat Platform Plugin for Hermes Agent.
+
+Registers a gateway platform adapter that connects to a self-hosted
+Rocket.Chat server via DDP/WebSocket (real-time incoming messages + presence)
+and REST API (outgoing replies).
+"""
+
+import logging
+import os
+
+logger = logging.getLogger(__name__)
+
+# ── Interaction Templates (source of truth — zero yaml dependency) ──
+_TEMPLATE_MAP = {
+    "yes_no": {
+        "label": "Ja/Nein",
+        "description": "Binary confirmation",
+        "attachment": {"color": "#1d74f5", "title": "Bitte bestätigen:"},
+        "buttons": [
+            {"text": "✅ Ja", "msg": "ja", "style": "primary"},
+            {"text": "❌ Nein", "msg": "nein", "style": "danger"},
+        ],
+    },
+    "confirm_cancel": {
+        "label": "Bestätigen/Abbrechen",
+        "description": "Safe action with abort",
+        "attachment": {"color": "#1d74f5", "title": "Aktion bestätigen:"},
+        "buttons": [
+            {"text": "✅ Bestätigen", "msg": "bestätigen", "style": "primary"},
+            {"text": "🚫 Abbrechen", "msg": "abbrechen", "style": "danger"},
+        ],
+    },
+    "ok": {
+        "label": "OK",
+        "description": "Single acknowledgement",
+        "attachment": {"color": "#1d74f5", "title": "Hinweis:"},
+        "buttons": [
+            {"text": "👍 OK", "msg": "ok", "style": "primary"},
+        ],
+    },
+    "multi_choice_3": {
+        "label": "3 Optionen",
+        "description": "Three-option selection",
+        "attachment": {"color": "#1d74f5", "title": "Wähle eine Option:"},
+        "buttons": [
+            {"text": "1._Links", "msg": "links", "style": "default"},
+            {"text": "2._Rechts", "msg": "rechts", "style": "default"},
+            {"text": "3._Zwei_Runden", "msg": "zwei_runden", "style": "default"},
+        ],
+    },
+}
+
+
+def _build_custom_buttons(labels: list, prefix: str = "") -> list:
+    """Build Rocket.Chat action buttons from plain label strings.
+
+    Rocket.Chat UI truncates button text after ~11-12 chars.
+    Use short labels (emoji+text without spaces, or numbered refs).
+    """
+    buttons = []
+    for idx, label in enumerate(labels):
+        # Sanitize label for button text (keep short)
+        display = label.strip()
+        # Payload may carry question_id prefix for correlation
+        msg_payload = display
+        if prefix:
+            msg_payload = f"{prefix}::{msg_payload}"
+        buttons.append({
+            "type": "button",
+            "text": display,
+            "msg": msg_payload,
+            "msg_in_chat_window": True,
+            "style": "default",
+        })
+    return buttons
+
+
+def check_requirements():
+    """Rocket.Chat adapter uses only stdlib (urllib, socket, ssl, threading)."""
+    return True
+
+
+def validate_config(config) -> bool:
+    """Check whether the platform is properly configured."""
+    extra = getattr(config, "extra", {}) or {}
+    base_url = os.getenv("ROCKETCHAT_BASE_URL") or extra.get("base_url", "")
+    user = os.getenv("ROCKETCHAT_USER") or extra.get("user", "")
+    password = os.getenv("ROCKETCHAT_PASSWORD") or extra.get("password", "")
+    return bool(base_url and user and password)
+
+
+def is_connected(config) -> bool:
+    """Check whether Rocket.Chat is configured (env or config.yaml)."""
+    return validate_config(config)
+
+
+def register(ctx):
+    """Plugin entry point — called by the Hermes plugin system at startup."""
+    from .adapter import RocketChatAdapter  # lazy import avoids circular deps
+
+    ctx.register_platform(
+        name="rocketchat",
+        label="Rocket.Chat",
+        adapter_factory=lambda cfg: RocketChatAdapter(cfg),
+        check_fn=check_requirements,
+        validate_config=validate_config,
+        is_connected=is_connected,
+        required_env=["ROCKETCHAT_BASE_URL", "ROCKETCHAT_USER", "ROCKETCHAT_PASSWORD"],
+        install_hint="No extra packages needed (stdlib only)",
+        allowed_users_env="ROCKETCHAT_ALLOWED_USERS",
+        allow_all_env="ROCKETCHAT_ALLOW_ALL_USERS",
+        max_message_length=4000,
+        emoji="🚀",
+        pii_safe=False,
+        allow_update_command=True,
+        platform_hint=(
+            "You are chatting via Rocket.Chat. You support markdown formatting: "
+            "**bold**, *italic*, `inline code`, ```code blocks```, and [links](url). "
+            "Messages can be up to ~4000 characters. You have a green online dot "
+            "via DDP presence. Use professional but friendly tone."
+        ),
+    )
diff --git a/adapter.py b/adapter.py
new file mode 100644
index 0000000..d719936
--- /dev/null
+++ b/adapter.py
@@ -0,0 +1,512 @@
+"""
+Rocket.Chat Platform Adapter for Hermes Agent.
+
+Plugin-based gateway adapter connecting to a self-hosted Rocket.Chat server.
+Uses WebSocket/DDP for real-time incoming messages + presence,
+and REST API for sending replies.
+
+Zero external dependencies — stdlib only.
+"""
+
+import asyncio
+import json
+import logging
+import os
+import queue
+import socket
+import ssl
+import struct
+import threading
+import time
+import urllib.request
+from typing import Any, Dict, List, Optional
+
+logger = logging.getLogger(__name__)
+
+try:
+    from gateway.platforms.base import (
+        BasePlatformAdapter,
+        SendResult,
+        MessageEvent,
+        MessageType,
+    )
+    from gateway.session import SessionSource
+    from gateway.config import PlatformConfig, Platform
+except ImportError:
+    # Fallback for standalone test / development outside gateway
+    BasePlatformAdapter = object
+    SendResult = dict
+    MessageEvent = dict
+    MessageType = object
+    SessionSource = object
+    PlatformConfig = object
+    Platform = str
+
+
+def _get_config_str(config: PlatformConfig, key: str, env_var: str, default: str = "") -> str:
+    extra = getattr(config, "extra", {}) or {}
+    return os.getenv(env_var) or extra.get(key, default)
+
+
+class RocketChatREST:
+    def __init__(self, base_url: str):
+        self.base_url = base_url.rstrip("/")
+        self.auth_token: Optional[str] = None
+        self.user_id: Optional[str] = None
+
+    def _request(self, method: str, endpoint: str, headers: Optional[dict] = None, data: Optional[dict] = None):
+        url = f"{self.base_url}{endpoint}"
+        req_headers = dict(headers) if headers else {}
+        body = json.dumps(data).encode("utf-8") if data else None
+        if body:
+            req_headers["Content-Type"] = "application/json"
+        req = urllib.request.Request(url, data=body, headers=req_headers, method=method)
+        try:
+            with urllib.request.urlopen(req, timeout=30) as resp:
+                return json.loads(resp.read().decode("utf-8"))
+        except Exception as e:
+            logger.debug("REST %s %s failed: %s", method, endpoint, e)
+            return None
+
+    def login(self, user: str, password: str) -> bool:
+        r = self._request("POST", "/api/v1/login", data={"user": user, "password": password})
+        if r and r.get("status") == "success":
+            self.auth_token = r["data"]["authToken"]
+            self.user_id = r["data"]["userId"]
+            return True
+        return False
+
+    def get_rooms(self) -> List[dict]:
+        if not self.auth_token:
+            return []
+        r = self._request("GET", "/api/v1/rooms.get", headers={
+            "X-Auth-Token": self.auth_token,
+            "X-User-Id": self.user_id,
+        })
+        if not r or not r.get("success"):
+            return []
+        rooms = []
+        for rm in r.get("update", []):
+            t = rm.get("t", "c")
+            rid = rm["_id"]
+            if t == "d":
+                usernames = rm.get("usernames", [])
+                other = [u for u in usernames if u != os.getenv("ROCKETCHAT_USER", "")]
+                name = "DM mit " + (", ".join(other) if other else "unbekannt")
+            else:
+                name = rm.get("name", "unnamed")
+            rooms.append({"id": rid, "name": name, "type": t})
+        return rooms
+
+    def post_message(self, room_id: str, text: str, attachments: Optional[List[dict]] = None) -> bool:
+        if not self.auth_token:
+            return False
+        payload = {"roomId": room_id, "text": text}
+        if attachments:
+            payload["attachments"] = attachments
+        r = self._request("POST", "/api/v1/chat.postMessage", headers={
+            "X-Auth-Token": self.auth_token,
+            "X-User-Id": self.user_id,
+            "Content-Type": "application/json",
+        }, data=payload)
+        return bool(r and r.get("success"))
+
+
+class DDPClient:
+    PING_INTERVAL = 8.0
+    RECONNECT_BACKOFFS = [5, 10, 20, 30, 60, 120]
+
+    def __init__(self, host: str, on_message_cb=None, on_connected_cb=None):
+        self.host = host
+        self._on_message = on_message_cb
+        self._on_connected = on_connected_cb
+        self.sock: Optional[socket.socket] = None
+        self.connected = False
+        self._running = False
+        self._reader_thread: Optional[threading.Thread] = None
+        self._write_lock = threading.Lock()
+        self._msg_queue: queue.Queue = queue.Queue()
+        self._next_sub_id = 1
+        self._sub_rooms: Dict[str, str] = {}
+        self._session: Optional[str] = None
+        self._reconnect_attempt = 0
+
+    def _create_socket(self) -> socket.socket:
+        ctx = ssl.create_default_context()
+        raw = socket.create_connection((self.host, 443), timeout=10)
+        return ctx.wrap_socket(raw, server_hostname=self.host)
+
+    def _handshake(self, s: socket.socket) -> bool:
+        import base64
+        key = base64.b64encode(os.urandom(16)).decode()
+        hs = (
+            f"GET /websocket HTTP/1.1\r\n"
+            f"Host: {self.host}\r\n"
+            f"Upgrade: websocket\r\n"
+            f"Connection: Upgrade\r\n"
+            f"Sec-WebSocket-Key: {key}\r\n"
+            f"Sec-WebSocket-Version: 13\r\n"
+            f"Origin: https://{self.host}\r\n\r\n"
+        )
+        s.sendall(hs.encode())
+        resp = b""
+        while b"\r\n\r\n" not in resp:
+            chunk = s.recv(1024)
+            if not chunk:
+                break
+            resp += chunk
+        return b"101 Switching Protocols" in resp
+
+    def _send_frame(self, data: bytes, opcode: int = 0x01, mask: bool = True) -> None:
+        if not self.sock:
+            return
+        length = len(data)
+        if length < 126:
+            header = struct.pack("!BB", 0x80 | opcode, (0x80 if mask else 0x00) | length)
+        elif length < 65536:
+            header = struct.pack("!BBH", 0x80 | opcode, (0x80 if mask else 0x00) | 126, length)
+        else:
+            header = struct.pack("!BBQ", 0x80 | opcode, (0x80 if mask else 0x00) | 127, length)
+        frame = header
+        if mask:
+            masking = os.urandom(4)
+            masked = bytes(b ^ masking[i % 4] for i, b in enumerate(data))
+            frame += masking + masked
+        else:
+            frame += data
+        with self._write_lock:
+            self.sock.sendall(frame)
+
+    def _send_json(self, obj: dict) -> None:
+        self._send_frame(json.dumps(obj).encode("utf-8"), opcode=0x01, mask=True)
+
+    def _send_raw_pong(self, payload: bytes) -> None:
+        self._send_frame(payload, opcode=0x0A, mask=True)
+
+    def _reader_loop(self):
+        import select
+        self.sock.settimeout(1.0)
+        last_ping = time.time()
+        while self._running:
+            try:
+                if time.time() - last_ping >= self.PING_INTERVAL:
+                    try:
+                        self._send_json({"msg": "ping"})
+                        last_ping = time.time()
+                    except Exception:
+                        break
+                readable, _, _ = select.select([self.sock], [], [], 1.0)
+                if not readable:
+                    continue
+                hdr = self.sock.recv(2)
+                if not hdr:
+                    break
+                fin = (hdr[0] & 0x80) != 0
+                opcode = hdr[0] & 0x0F
+                masked = (hdr[1] & 0x80) != 0
+                length = hdr[1] & 0x7F
+                if length == 126:
+                    length = struct.unpack("!H", self.sock.recv(2))[0]
+                elif length == 127:
+                    length = struct.unpack("!Q", self.sock.recv(8))[0]
+                payload = b""
+                remaining = length
+                while remaining > 0:
+                    chunk = self.sock.recv(min(4096, remaining))
+                    if not chunk:
+                        break
+                    payload += chunk
+                    remaining -= len(chunk)
+                if len(payload) < length:
+                    break
+                if masked:
+                    mask = payload[:4]
+                    payload = bytes(b ^ mask[i % 4] for i, b in enumerate(payload[4:]))
+                if opcode == 0x09:
+                    self._send_raw_pong(payload)
+                elif opcode == 0x01 and payload:
+                    try:
+                        data = json.loads(payload.decode("utf-8"))
+                        msg_type = data.get("msg", "")
+                        if msg_type == "connected":
+                            self.connected = True
+                            self._session = data.get("session")
+                            if self._on_connected:
+                                self._on_connected()
+                        elif msg_type == "ping":
+                            self._send_json({"msg": "pong"})
+                        elif msg_type == "changed" and data.get("collection") == "stream-room-messages":
+                            fields = data.get("fields", {})
+                            args = fields.get("args", [])
+                            if args and isinstance(args, list):
+                                self._msg_queue.put(args[0])
+                    except Exception:
+                        pass
+                elif opcode == 0x08:
+                    break
+            except Exception:
+                break
+        self.connected = False
+        logger.debug("DDP reader thread exited")
+
+    def connect_and_login(self, token: str) -> bool:
+        try:
+            self.sock = self._create_socket()
+            if not self._handshake(self.sock):
+                return False
+            self._running = True
+            self._reader_thread = threading.Thread(target=self._reader_loop, daemon=True)
+            self._reader_thread.start()
+            time.sleep(0.3)
+            self._send_json({"msg": "connect", "version": "1", "support": ["1", "pre2", "pre1"]})
+            for _ in range(50):
+                if self.connected:
+                    break
+                time.sleep(0.1)
+            if not self.connected:
+                self.disconnect()
+                return False
+            time.sleep(0.2)
+            self._send_json({"msg": "method", "method": "login",
+                             "params": [{"resume": token}], "id": "ddplogin"})
+            time.sleep(0.5)
+            return True
+        except Exception as e:
+            logger.error("DDP connect failed: %s", e)
+            self.disconnect()
+            return False
+
+    def subscribe_room(self, room_id: str) -> Optional[str]:
+        if not self.connected:
+            return None
+        sub_id = f"sub{self._next_sub_id}"
+        self._next_sub_id += 1
+        # CRITICAL: Rocket.Chat V5+ requires {"token": "true"} as second param,
+        # otherwise subscribe succeeds but NO messages ever stream.
+        self._send_json({
+            "msg": "sub",
+            "name": "stream-room-messages",
+            "params": [room_id, {"token": "true"}],
+            "id": sub_id
+        })
+        self._sub_rooms[room_id] = sub_id
+        return sub_id
+
+    def set_status(self, status: str) -> bool:
+        if not self.connected:
+            return False
+        method = f"UserPresence:{status}"
+        self._send_json({"msg": "method", "method": method, "params": [], "id": f"st{int(time.time()*1000)}"})
+        return True
+
+    def disconnect(self):
+        self._running = False
+        if self.sock:
+            try:
+                self.sock.close()
+            except Exception:
+                pass
+            self.sock = None
+        self.connected = False
+        self._sub_rooms.clear()
+
+    def reconnect_and_restore(self, token: str) -> bool:
+        self.disconnect()
+        time.sleep(1)
+        old_subs = list(self._sub_rooms.keys())
+        self._sub_rooms.clear()
+        if self.connect_and_login(token):
+            for rid in old_subs:
+                self.subscribe_room(rid)
+            return True
+        return False
+
+
+class RocketChatAdapter(BasePlatformAdapter):
+    def __init__(self, config: PlatformConfig):
+        super().__init__(config=config, platform=Platform("rocketchat"))
+        self.base_url = _get_config_str(config, "base_url", "ROCKETCHAT_BASE_URL")
+        self.user = _get_config_str(config, "user", "ROCKETCHAT_USER")
+        self.password = _get_config_str(config, "password", "ROCKETCHAT_PASSWORD")
+        self.rest = RocketChatREST(self.base_url)
+        self.ddp: Optional[DDPClient] = None
+        self._auth_token: Optional[str] = None
+        self._user_id: Optional[str] = None
+        self._rooms: List[dict] = []
+        self._subscribed_rooms: set = set()
+        self._listen_task: Optional[asyncio.Task] = None
+        self._status_timer: Optional[threading.Timer] = None
+        self._last_activity = 0.0
+        self._shutdown_event = threading.Event()
+        self._room_info: Dict[str, dict] = {}
+
+    async def connect(self) -> bool:
+        if not self.base_url or not self.user or not self.password:
+            logger.error("[rocketchat] Missing configuration")
+            return False
+        if not self.rest.login(self.user, self.password):
+            logger.error("[rocketchat] REST login failed")
+            return False
+        self._auth_token = self.rest.auth_token
+        self._user_id = self.rest.user_id
+        host = self.base_url.replace("https://", "").replace("http://", "").split("/")[0]
+        self.ddp = DDPClient(
+            host=host,
+            on_connected_cb=lambda: self.ddp.set_status("away") if self.ddp else None,
+        )
+        if not self.ddp.connect_and_login(self._auth_token):
+            logger.error("[rocketchat] DDP connect/login failed")
+            return False
+        self._rooms = self.rest.get_rooms()
+        for room in self._rooms:
+            sub_id = self.ddp.subscribe_room(room["id"])
+            if sub_id:
+                self._subscribed_rooms.add(room["id"])
+                self._room_info[room["id"]] = {"name": room["name"], "type": room["type"]}
+                logger.info("[rocketchat] Subscribed to %s", room["name"])
+        self._mark_connected()
+        self._listen_task = asyncio.create_task(self._listen_loop())
+        self._last_activity = time.time()
+        self._schedule_idle_timer()
+        logger.info("[rocketchat] Connected to %s", self.base_url)
+        return True
+
+    async def disconnect(self) -> None:
+        self._mark_disconnected()
+        self._shutdown_event.set()
+        if self._status_timer:
+            self._status_timer.cancel()
+        if self._listen_task and not self._listen_task.done():
+            self._listen_task.cancel()
+            try:
+                await self._listen_task
+            except asyncio.CancelledError:
+                pass
+        if self.ddp:
+            self.ddp.disconnect()
+            self.ddp = None
+        logger.info("[rocketchat] Disconnected")
+
+    async def send(self, chat_id: str, content: str, reply_to: Optional[str] = None,
+                   metadata: Optional[Dict[str, Any]] = None) -> SendResult:
+        if not self.rest.auth_token:
+            return SendResult(success=False, error="Not authenticated")
+
+        # Handle interaction templates via metadata
+        attachments = None
+        if metadata and metadata.get("template"):
+            from . import _TEMPLATE_MAP, _build_custom_buttons
+            template_name = metadata.get("template")
+            question_id = metadata.get("question_id", "")
+            if template_name == "custom" and metadata.get("custom_buttons"):
+                buttons = _build_custom_buttons(metadata["custom_buttons"], prefix=question_id)
+                attachments = [{
+                    "color": "#1d74f5",
+                    "title": metadata.get("button_title", "Wähle eine Option:"),
+                    "actions": buttons,
+                }]
+            elif template_name in _TEMPLATE_MAP:
+                tmpl = _TEMPLATE_MAP[template_name]
+                attachment = dict(tmpl.get("attachment", {}))
+                raw_buttons = tmpl.get("buttons", [])
+                buttons = []
+                for btn in raw_buttons:
+                    msg_payload = btn.get("msg", "")
+                    if question_id:
+                        msg_payload = f"{question_id}::{msg_payload}"
+                    buttons.append({
+                        "type": "button",
+                        "text": btn.get("text", "?"),
+                        "msg": msg_payload,
+                        "msg_in_chat_window": True,
+                        "style": btn.get("style", "default"),
+                    })
+                attachment["actions"] = buttons
+                attachments = [attachment]
+
+        success = self.rest.post_message(chat_id, content, attachments=attachments)
+        if success:
+            return SendResult(success=True, message_id=str(int(time.time() * 1000)))
+        return SendResult(success=False, error="chat.postMessage failed")
+
+    async def send_typing(self, chat_id: str, metadata=None) -> None:
+        pass
+
+    async def get_chat_info(self, chat_id: str) -> Dict[str, Any]:
+        info = self._room_info.get(chat_id, {})
+        return {"name": info.get("name", chat_id), "type": "group" if info.get("type") in ("c", "p") else "dm"}
+
+    async def _listen_loop(self):
+        loop = asyncio.get_running_loop()
+        while self._running and not self._shutdown_event.is_set():
+            try:
+                msg_obj = await loop.run_in_executor(None, self._ddp_queue_get, 1.0)
+                if msg_obj is None:
+                    if self.ddp and not self.ddp.connected:
+                        logger.warning("[rocketchat] DDP disconnected, reconnecting...")
+                        if self._auth_token and self.ddp.reconnect_and_restore(self._auth_token):
+                            logger.info("[rocketchat] Reconnected")
+                        else:
+                            await asyncio.sleep(5)
+                    continue
+                await self._process_incoming(msg_obj)
+            except asyncio.CancelledError:
+                break
+            except Exception as e:
+                logger.error("[rocketchat] Listener error: %s", e)
+                await asyncio.sleep(1)
+
+    def _ddp_queue_get(self, timeout: float):
+        if not self.ddp:
+            return None
+        try:
+            return self.ddp._msg_queue.get(timeout=timeout)
+        except queue.Empty:
+            return None
+
+    async def _process_incoming(self, msg_obj: dict):
+        rid = msg_obj.get("rid")
+        msg_text = msg_obj.get("msg", "")
+        msg_id = msg_obj.get("_id", "")
+        user_info = msg_obj.get("u", {})
+        sender_id = user_info.get("_id", "")
+        sender_name = user_info.get("username", "unknown")
+        if sender_id == self._user_id:
+            return
+        if not rid or not msg_text:
+            return
+        self._last_activity = time.time()
+        self._go_online()
+        room_name = self._room_info.get(rid, {}).get("name", rid)
+        source = self.build_source(
+            chat_id=rid,
+            chat_name=room_name,
+            chat_type="group" if self._room_info.get(rid, {}).get("type") in ("c", "p") else "dm",
+            user_id=sender_id,
+            user_name=sender_name,
+        )
+        event = MessageEvent(
+            text=msg_text,
+            message_type=MessageType.TEXT,
+            source=source,
+            raw_message=msg_obj,
+            message_id=msg_id,
+        )
+        await self.handle_message(event)
+
+    def _go_online(self):
+        if self.ddp and self.ddp.connected:
+            self.ddp.set_status("online")
+        self._schedule_idle_timer()
+
+    def _go_idle(self):
+        idle = time.time() - self._last_activity
+        if idle >= 900 and self.ddp and self.ddp.connected:
+            self.ddp.set_status("away")
+
+    def _schedule_idle_timer(self):
+        if self._status_timer:
+            self._status_timer.cancel()
+        self._status_timer = threading.Timer(900, self._go_idle)
+        self._status_timer.daemon = True
+        self._status_timer.start()
diff --git a/plugin.yaml b/plugin.yaml
new file mode 100644
index 0000000..91e2eef
--- /dev/null
+++ b/plugin.yaml
@@ -0,0 +1,22 @@
+name: rocketchat-platform
+kind: platform
+version: 1.0.0
+description: >
+  Rocket.Chat gateway adapter for Hermes Agent.
+  Connects to a self-hosted Rocket.Chat server via WebSocket/DDP for
+  real-time message streaming and presence, and REST API for sending replies.
+  Supports channels, private groups, and direct messages.
+author: Hermes Community
+requires_env:
+  - ROCKETCHAT_BASE_URL
+  - ROCKETCHAT_USER
+  - ROCKETCHAT_PASSWORD
+  - name: ROCKETCHAT_ROOM_ID
+    description: "Default room/channel ID to subscribe (optional if auto-discovery enabled)"
+    required: false
+  - name: ROCKETCHAT_ALLOW_ALL_USERS
+    description: "Set to 'true' to allow all users (default: false = allowlist)"
+    required: false
+  - name: ROCKETCHAT_ALLOWED_USERS
+    description: "Comma-separated list of allowed Rocket.Chat usernames"
+    required: false