diff --git a/demo/stand/README.md b/demo/stand/README.md
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+# Demo-stand extras
+
+Things that live on the public stand (demo.houseplan.tech) but are not part
+of the shipped integration.
+
+- `demo_robot/` — the scripted robot vacuum (docs/VACUUM.md, "demo stand gets
+  a scripted synthetic robot"). Deployed by copying the folder to
+  `custom_components/demo_robot` in both stand seeds and adding `demo_robot:`
+  to configuration.yaml; the dev stand picks it up automatically from this
+  path (`/opt/hp/bin/hp-update-dev.sh`). The rest of the stand-only config
+  (template LQI sensors, alarm helpers, the smoke automation) lives in the
+  seeds on the stand host — see `docs/TESTING-DEMO.md` and the memory note
+  `houseplan-demo-stand`.
diff --git a/demo/stand/demo_robot/__init__.py b/demo/stand/demo_robot/__init__.py
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+++ b/demo/stand/demo_robot/__init__.py
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+"""Scripted robot vacuum for the public demo stand.
+
+The real feature (docs/VACUUM.md) targets Tier-A map integrations — Xiaomi
+Cloud Map Extractor, Tasshack dreame-vacuum, Valetudo. None of them can run
+on the stand (no hardware), so the stand ships this simulator instead: a
+`vacuum` entity with start/pause/return_to_base and a `sensor` whose
+attributes follow the Tasshack shape (`vacuum_position` as a dict, `rooms`
+with names matching the plan rooms, `map_index`). Room names match the demo
+house on purpose — that is what makes «Настроить автоматически» demonstrable.
+
+Coordinates are millimetres in 0..8000 with the Y axis flipped versus the
+screen (like every real robot map seen so far) so the mirror toggle in the
+fit panel has meaning on the stand too.
+"""
+from __future__ import annotations
+
+import math
+from datetime import timedelta
+from typing import Any, Callable
+
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers import discovery
+from homeassistant.helpers.event import async_track_time_interval
+from homeassistant.helpers.typing import ConfigType
+
+DOMAIN = "demo_robot"
+TICK_S = 2          # telemetry cadence
+SPEED_MM = 600      # per tick ≈ 0.3 m/s, a realistic robot pace
+DOCK = (3900.0, 2600.0)
+
+# Robot-map rooms, mm, Y up (flipped vs screen). Bboxes mirror the plan's
+# room polygons; the names MUST equal the plan room names — auto-calibration
+# matches by name.
+ROOMS: dict[str, tuple[str, float, float, float, float]] = {
+    "1": ("Гостиная", 480, 4320, 4160, 7360),
+    "2": ("Кухня", 4160, 5120, 7520, 7360),
+    "3": ("Спальня", 4160, 2400, 7520, 5120),
+    "4": ("Кабинет", 480, 2400, 2720, 4320),
+    "5": ("Прихожая", 2720, 2400, 4160, 4320),
+}
+# cleaning order: start at the dock in the hallway, end next to it
+CLEAN_ORDER = ("5", "4", "1", "2", "3")
+INSET = 350.0       # keep lanes away from walls
+LANE_MM = 650.0     # serpentine lane spacing
+
+
+def _serpentine(x0: float, y0: float, x1: float, y1: float) -> list[tuple[float, float]]:
+    """Boustrophedon lanes across a room bbox, like a real vacuum drives."""
+    x0, y0, x1, y1 = x0 + INSET, y0 + INSET, x1 - INSET, y1 - INSET
+    pts: list[tuple[float, float]] = []
+    y = y0
+    left_to_right = True
+    while y <= y1 + 1:
+        xs = (x0, x1) if left_to_right else (x1, x0)
+        pts.append((xs[0], y))
+        pts.append((xs[1], y))
+        left_to_right = not left_to_right
+        y += LANE_MM
+    return pts
+
+
+def build_route() -> list[tuple[float, float]]:
+    route: list[tuple[float, float]] = [DOCK]
+    for rid in CLEAN_ORDER:
+        _, x0, y0, x1, y1 = ROOMS[rid]
+        route.extend(_serpentine(x0, y0, x1, y1))
+    route.append(DOCK)
+    return route
+
+
+class RobotSim:
+    """One shared simulation both entities read from."""
+
+    def __init__(self, hass: HomeAssistant) -> None:
+        self.hass = hass
+        self.route = build_route()
+        self.state = "docked"        # docked|cleaning|paused|returning
+        self.pos: tuple[float, float] = DOCK
+        self.heading = 0.0
+        self._seg = 0                # index of the segment being driven
+        self._seg_done = 0.0         # mm driven inside the current segment
+        self._back: list[tuple[float, float]] | None = None  # manual return path
+        self._listeners: list[Callable[[], None]] = []
+
+    # ---- entity plumbing ----
+    def add_listener(self, cb: Callable[[], None]) -> Callable[[], None]:
+        self._listeners.append(cb)
+
+        def _remove() -> None:
+            if cb in self._listeners:
+                self._listeners.remove(cb)
+        return _remove
+
+    def _notify(self) -> None:
+        for cb in list(self._listeners):
+            cb()
+
+    # ---- commands (called by the vacuum entity) ----
+    def start(self) -> None:
+        if self.state == "paused":
+            self.state = "returning" if self._back else "cleaning"
+        else:
+            self.state = "cleaning"
+            self._seg = 0
+            self._seg_done = 0.0
+            self._back = None
+            self.pos = DOCK
+        self._notify()
+
+    def pause(self) -> None:
+        if self.state in ("cleaning", "returning"):
+            self.state = "paused"
+            self._notify()
+
+    def stop(self) -> None:
+        self.pause()
+
+    def return_to_base(self) -> None:
+        if self.state == "docked":
+            return
+        # retrace the visited waypoints backwards — a straight line to the
+        # dock would cut through walls
+        visited = self.route[: self._seg + 1]
+        self._back = [self.pos] + list(reversed(visited))
+        self._seg = 0
+        self._seg_done = 0.0
+        self.state = "returning"
+        self._notify()
+
+    # ---- physics ----
+    def _polyline(self) -> list[tuple[float, float]]:
+        return self._back if self._back is not None else self.route
+
+    def tick(self, _now: Any = None) -> None:
+        if self.state not in ("cleaning", "returning"):
+            return
+        line = self._polyline()
+        # manual return drives twice as fast, like the real thing hurrying home
+        budget = SPEED_MM * (2 if self._back is not None else 1)
+        while budget > 0 and self._seg < len(line) - 1:
+            ax, ay = line[self._seg]
+            bx, by = line[self._seg + 1]
+            seg_len = math.hypot(bx - ax, by - ay)
+            left = seg_len - self._seg_done
+            if left <= budget:
+                budget -= left
+                self._seg += 1
+                self._seg_done = 0.0
+                continue
+            self._seg_done += budget
+            t = self._seg_done / seg_len
+            self.pos = (ax + (bx - ax) * t, ay + (by - ay) * t)
+            self.heading = math.degrees(math.atan2(by - ay, bx - ax)) % 360
+            budget = 0
+        if self._seg >= len(line) - 1:
+            # arrived: either the route is finished or the manual return is
+            self.pos = line[-1]
+            self.state = "docked"
+            self._back = None
+        elif self._back is None and self._seg >= len(line) - 2:
+            # the last route leg is the drive home
+            self.state = "returning"
+        self._notify()
+
+
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
+    sim = RobotSim(hass)
+    hass.data[DOMAIN] = sim
+
+    @callback
+    def _tick(now: Any) -> None:
+        sim.tick(now)
+
+    async_track_time_interval(hass, _tick, timedelta(seconds=TICK_S))
+    hass.async_create_task(
+        discovery.async_load_platform(hass, "vacuum", DOMAIN, {}, config)
+    )
+    hass.async_create_task(
+        discovery.async_load_platform(hass, "sensor", DOMAIN, {}, config)
+    )
+    return True
diff --git a/demo/stand/demo_robot/manifest.json b/demo/stand/demo_robot/manifest.json
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+++ b/demo/stand/demo_robot/manifest.json
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+{
+  "domain": "demo_robot",
+  "name": "Demo Robot Vacuum",
+  "codeowners": [],
+  "dependencies": [],
+  "documentation": "https://github.com/Matysh/houseplan-card/tree/dev/demo/stand/demo_robot",
+  "iot_class": "calculated",
+  "requirements": [],
+  "version": "1.0.0"
+}
diff --git a/demo/stand/demo_robot/sensor.py b/demo/stand/demo_robot/sensor.py
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+++ b/demo/stand/demo_robot/sensor.py
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+"""The map sensor of the stand simulator — Tasshack-shaped attributes.
+
+`vacuum_position` is a plain dict on purpose: the real Tasshack integration
+keeps a Point OBJECT in memory (houseplan's trail recorder handles both), but
+a dict is what any template/attribute tooling on the stand can also read.
+"""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.components.sensor import SensorEntity
+from homeassistant.core import HomeAssistant
+
+from . import DOMAIN, ROOMS, RobotSim
+
+
+async def async_setup_platform(hass: HomeAssistant, config, add_entities, discovery_info=None) -> None:
+    add_entities([DemoRobotMap(hass.data[DOMAIN])])
+
+
+class DemoRobotMap(SensorEntity):
+    _attr_should_poll = False
+    _attr_name = "Карта робота-пылесоса"
+    _attr_unique_id = "demo_robot_map"
+    _attr_icon = "mdi:map"
+
+    def __init__(self, sim: RobotSim) -> None:
+        self._sim = sim
+        self.entity_id = "sensor.demo_robot_map"
+
+    async def async_added_to_hass(self) -> None:
+        self.async_on_remove(self._sim.add_listener(self.async_write_ha_state))
+
+    @property
+    def native_value(self) -> str:
+        return self._sim.state
+
+    @property
+    def extra_state_attributes(self) -> dict[str, Any]:
+        x, y = self._sim.pos
+        return {
+            "vacuum_position": {
+                "x": round(x, 1),
+                "y": round(y, 1),
+                "a": round(self._sim.heading, 1),
+            },
+            "rooms": {
+                rid: {
+                    "name": name,
+                    "x0": x0, "y0": y0, "x1": x1, "y1": y1,
+                    "x": (x0 + x1) / 2, "y": (y0 + y1) / 2,
+                }
+                for rid, (name, x0, y0, x1, y1) in ROOMS.items()
+            },
+            "map_index": 1,
+        }
diff --git a/demo/stand/demo_robot/vacuum.py b/demo/stand/demo_robot/vacuum.py
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+++ b/demo/stand/demo_robot/vacuum.py
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+"""The vacuum entity of the stand simulator."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.components.vacuum import (
+    StateVacuumEntity,
+    VacuumActivity,
+    VacuumEntityFeature,
+)
+from homeassistant.core import HomeAssistant
+
+from . import DOMAIN, RobotSim
+
+ACTIVITY = {
+    "docked": VacuumActivity.DOCKED,
+    "cleaning": VacuumActivity.CLEANING,
+    "paused": VacuumActivity.PAUSED,
+    "returning": VacuumActivity.RETURNING,
+}
+
+
+async def async_setup_platform(hass: HomeAssistant, config, add_entities, discovery_info=None) -> None:
+    add_entities([DemoRobotVacuum(hass.data[DOMAIN])])
+
+
+class DemoRobotVacuum(StateVacuumEntity):
+    _attr_should_poll = False
+    _attr_name = "Робот-пылесос"
+    _attr_unique_id = "demo_robot_vacuum"
+    _attr_supported_features = (
+        VacuumEntityFeature.START
+        | VacuumEntityFeature.STOP
+        | VacuumEntityFeature.PAUSE
+        | VacuumEntityFeature.RETURN_HOME
+        | VacuumEntityFeature.STATE
+    )
+
+    def __init__(self, sim: RobotSim) -> None:
+        self._sim = sim
+        self.entity_id = "vacuum.demo_robot"
+
+    async def async_added_to_hass(self) -> None:
+        self.async_on_remove(self._sim.add_listener(self.async_write_ha_state))
+
+    @property
+    def activity(self) -> VacuumActivity:
+        return ACTIVITY.get(self._sim.state, VacuumActivity.IDLE)
+
+    @property
+    def extra_state_attributes(self) -> dict[str, Any]:
+        # the card resolves the active map name through the vacuum entity
+        return {"selected_map": "1"}
+
+    async def async_start(self) -> None:
+        self._sim.start()
+
+    async def async_pause(self) -> None:
+        self._sim.pause()
+
+    async def async_stop(self, **kwargs: Any) -> None:
+        self._sim.stop()
+
+    async def async_return_to_base(self, **kwargs: Any) -> None:
+        self._sim.return_to_base()