diff --git a/flipoff.py b/flipoff.py
deleted file mode 100644
index ca297aa..0000000
--- a/flipoff.py
+++ /dev/null
@@ -1,137 +0,0 @@
-import argparse
-import asyncio
-import os
-import time
-
-import cv2
-from dbus_next.aio.message_bus import MessageBus
-from dbus_next.constants import BusType
-import mediapipe as mp  # type: ignore[import-untyped]
-from mediapipe.tasks import python  # type: ignore[import-untyped]
-from mediapipe.tasks.python import vision  # type: ignore[import-untyped]
-import numpy as np
-
-
-from mediapipe.tasks.python.components.containers.landmark import (  # type: ignore[import-untyped]  # isort: skip
-    NormalizedLandmark,
-)
-
-MODEL_PATH = os.environ.get("FLIPOFF_MODEL_PATH")
-DEBUG = os.environ.get("FLIPOFF_DRYRUN", "0") == "1"
-
-
-async def poweroff() -> None:
-    bus = await MessageBus(bus_type=BusType.SYSTEM).connect()
-    proxy = bus.get_proxy_object(
-        "org.freedesktop.login1",
-        "/org/freedesktop/login1",
-        None,
-    )
-    manager = proxy.get_interface("org.freedesktop.login1.Manager")
-    await manager.call_power_off(False)
-
-
-def is_flipping_off(hand: list[NormalizedLandmark]) -> bool:
-    y_12 = hand[12].y
-    y_10 = hand[10].y
-    y_8 = hand[8].y
-    y_6 = hand[6].y
-    y_16 = hand[16].y
-    y_14 = hand[14].y
-    y_20 = hand[20].y
-    y_18 = hand[18].y
-    if (
-        y_12 is None
-        or y_10 is None
-        or y_8 is None
-        or y_6 is None
-        or y_16 is None
-        or y_14 is None
-        or y_20 is None
-        or y_18 is None
-    ):
-        return False
-    return bool(y_12 < y_10 and y_8 > y_6 and y_16 > y_14 and y_20 > y_18)
-
-
-async def async_poweroff() -> None:
-    if DEBUG:
-        print("DRYRUN: Would power off")
-        return
-    try:
-        await poweroff()
-    except Exception as e:
-        print(f"Poweroff failed: {e}")
-
-
-def main() -> None:
-    parser = argparse.ArgumentParser(description="Hand gesture poweroff utility")
-    parser.add_argument(
-        "--headless",
-        action="store_true",
-        help="Hide GUI window and run in headless mode",
-    )
-    args = parser.parse_args()
-
-    if not MODEL_PATH:
-        raise RuntimeError("FLIPOFF_MODEL_PATH environment variable not set")
-
-    loop = asyncio.new_event_loop()
-    asyncio.set_event_loop(loop)
-
-    base_options = python.BaseOptions(model_asset_path=MODEL_PATH)
-    options = vision.HandLandmarkerOptions(
-        base_options=base_options,
-        num_hands=1,
-        running_mode=vision.RunningMode.VIDEO,
-    )
-
-    detector = vision.HandLandmarker.create_from_options(options)
-    cap: cv2.VideoCapture = cv2.VideoCapture(0)
-    last_trigger: float = 0.0
-
-    while True:
-        ret: bool
-        frame: np.ndarray
-        ret, frame = cap.read()
-        if not ret:
-            break
-
-        mp_image = mp.Image(image_format=mp.ImageFormat.SRGB, data=frame)
-        result = detector.detect_for_video(mp_image, int(time.time() * 1000))
-
-        if result.hand_landmarks:
-            hand: list[NormalizedLandmark] = result.hand_landmarks[0]
-
-            if DEBUG:
-                for landmark in hand:
-                    x = int(landmark.x * frame.shape[1])
-                    y = int(landmark.y * frame.shape[0])
-                    cv2.circle(frame, (x, y), 5, (0, 255, 0), -1)
-
-            flipping = is_flipping_off(hand)
-            if DEBUG:
-                text = "FLIPPING OFF DETECTED" if flipping else "Waiting for gesture..."
-                color = (0, 0, 255) if flipping else (0, 255, 0)
-                cv2.putText(frame, text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, color, 2)
-
-            if flipping:
-                now: float = time.time()
-                if now - last_trigger > 2:
-                    last_trigger = now
-                    loop.run_until_complete(async_poweroff())
-
-        if not args.headless:
-            cv2.imshow("Gesture Poweroff", frame)
-            if cv2.waitKey(1) & 0xFF == 27:
-                break
-
-    cap.release()
-    if not args.headless:
-        cv2.destroyAllWindows()
-    detector.close()
-    loop.close()
-
-
-if __name__ == "__main__":
-    main()
diff --git a/pyproject.toml b/pyproject.toml
index 6c82145..c1e26ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,12 +2,31 @@
 name = "flipoff"
 version = "0.1.0"
 description = "Begone, clanker"
+readme = "README.md"
 requires-python = ">=3.11"
-dependencies = ["mediapipe", "opencv-contrib-python", "dbus-next", "numpy"]
+dependencies = [
+  "mediapipe>=0.10.33",
+  "opencv-contrib-python>=4.13.0",
+  "dbus-next>=0.2.3",
+  "numpy>=2.4.4",
+]
+
+[project.optional-dependencies]
+dev = ["black>=26.3.1", "isort>=8.0.1", "mypy>=1.20.0"]
+
+[project.scripts]
+flipoff = "flipoff.cli:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 [dependency-groups]
 dev = ["black>=26.3.1", "isort>=8.0.1", "mypy>=1.20.0"]
 
+[tool.hatch.build.targets.wheel]
+packages = ["src/flipoff"]
+
 [tool.black]
 line-length = 100
 target-version = ["py311"]
@@ -17,7 +36,6 @@ force_single_line = true
 force_sort_within_sections = true
 known_first_party = []
 known_third_party = ["cv2", "dbus_next", "mediapipe"]
-lines_after_imports = 2
 profile = "black"
 
 [tool.mypy]
@@ -33,11 +51,6 @@ no_implicit_optional = true
 warn_redundant_casts = true
 warn_unused_ignores = true
 warn_no_return = true
-show_error_codes = true
 
 [tool.basedpyright]
-typeCheckingMode = "off"
-
-[build-system]
-requires = ["poetry-core"]
-build-backend = "poetry.core.masonry.api"
+typeCheckingMode = "off" # too overzealous
diff --git a/src/flipoff/__init__.py b/src/flipoff/__init__.py
new file mode 100644
index 0000000..865f1e6
--- /dev/null
+++ b/src/flipoff/__init__.py
@@ -0,0 +1,13 @@
+from flipoff.events import EventRegistry
+from flipoff.events import PoweroffEvent
+from flipoff.gesture import FlippingOffGesture
+from flipoff.gesture import Gesture
+from flipoff.gesture import GestureRegistry
+
+__all__ = [
+    "EventRegistry",
+    "FlippingOffGesture",
+    "Gesture",
+    "GestureRegistry",
+    "PoweroffEvent",
+]
diff --git a/src/flipoff/__main__.py b/src/flipoff/__main__.py
new file mode 100644
index 0000000..4b071ec
--- /dev/null
+++ b/src/flipoff/__main__.py
@@ -0,0 +1,4 @@
+from flipoff.cli import main
+
+if __name__ == "__main__":
+    main()
diff --git a/src/flipoff/cli.py b/src/flipoff/cli.py
new file mode 100644
index 0000000..e99bffb
--- /dev/null
+++ b/src/flipoff/cli.py
@@ -0,0 +1,147 @@
+import argparse
+import asyncio
+import os
+import time
+
+import cv2
+
+from flipoff.detector import Camera
+from flipoff.detector import HandDetector
+from flipoff.events import EventRegistry
+from flipoff.gesture import Gesture
+from flipoff.gesture import GestureRegistry
+
+
+def _get_callback(
+    gesture_cls: type[Gesture],
+    event_instance: object,
+    cooldown: float,
+    last_trigger: list[float],
+) -> callable:
+    def callback(hand: object) -> bool:
+        gesture_detected = gesture_cls().detect(hand)
+        if gesture_detected:
+            now = time.time()
+            if now - last_trigger[0] > cooldown:
+                last_trigger[0] = now
+                asyncio.create_task(event_instance.trigger())  # type: ignore[attr-defined]
+        return gesture_detected
+
+    return callback
+
+
+def run(
+    gesture_name: str,
+    event_name: str,
+    headless: bool,
+    camera_index: int,
+    cooldown: float,
+    debug: bool,
+) -> None:
+    model_path = os.environ.get("FLIPOFF_MODEL_PATH")
+    if not model_path:
+        raise RuntimeError("FLIPOFF_MODEL_PATH environment variable not set")
+
+    gesture_cls = GestureRegistry.get(gesture_name)
+    if not gesture_cls:
+        raise ValueError(f"Unknown gesture: {gesture_name}")
+    event_cls = EventRegistry.get(event_name)
+    if not event_cls:
+        raise ValueError(f"Unknown event: {event_name}")
+
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
+
+    detector = HandDetector(model_path)
+    camera = Camera(camera_index)
+    event_instance = event_cls()
+
+    gesture_instance = gesture_cls()
+    last_trigger = [0.0]
+
+    callback = _get_callback(gesture_cls, event_instance, cooldown, last_trigger)
+
+    while True:
+        ret, frame = camera.read()
+        if not ret:
+            break
+
+        hands = detector.detect(frame)
+        if hands:
+            callback(hands[0])
+
+            if debug:
+                for landmark in hands[0]:
+                    x = int(landmark.x * frame.shape[1])
+                    y = int(landmark.y * frame.shape[0])
+                    cv2.circle(frame, (x, y), 5, (0, 255, 0), -1)
+
+                flipping = gesture_instance.detect(hands[0])
+                text = f"{gesture_name.upper()} DETECTED" if flipping else "Waiting for gesture..."
+                color = (0, 0, 255) if flipping else (0, 255, 0)
+                cv2.putText(frame, text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, color, 2)
+
+        if not headless:
+            cv2.imshow("Gesture Poweroff", frame)
+            if cv2.waitKey(1) & 0xFF == 27:
+                break
+
+    camera.release()
+    if not headless:
+        cv2.destroyAllWindows()
+    detector.close()
+    loop.close()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Hand gesture event utility")
+    parser.add_argument(
+        "--gesture",
+        type=str,
+        default="flipping_off",
+        choices=list(GestureRegistry.all().keys()),
+        help="Gesture to detect",
+    )
+    parser.add_argument(
+        "--event",
+        type=str,
+        default="poweroff",
+        choices=list(EventRegistry.all().keys()),
+        help="Event to trigger on gesture",
+    )
+    parser.add_argument(
+        "--headless",
+        action="store_true",
+        help="Hide GUI window and run in headless mode",
+    )
+    parser.add_argument(
+        "--camera",
+        type=int,
+        default=0,
+        help="Camera index to use",
+    )
+    parser.add_argument(
+        "--cooldown",
+        type=float,
+        default=2.0,
+        help="Cooldown between event triggers in seconds",
+    )
+    parser.add_argument(
+        "--debug",
+        action="store_true",
+        help="Show debug visualizations",
+    )
+    args = parser.parse_args()
+
+    run(
+        gesture_name=args.gesture,
+        event_name=args.event,
+        headless=args.headless,
+        camera_index=args.camera,
+        cooldown=args.cooldown,
+        debug=args.debug or os.environ.get("FLIPOFF_DRYRUN", "0") == "1",
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/src/flipoff/detector.py b/src/flipoff/detector.py
new file mode 100644
index 0000000..1cc8eb5
--- /dev/null
+++ b/src/flipoff/detector.py
@@ -0,0 +1,69 @@
+import time
+from typing import Callable
+
+import cv2
+import mediapipe as mp
+from mediapipe.tasks import python
+from mediapipe.tasks.python import vision
+from mediapipe.tasks.python.components.containers.landmark import NormalizedLandmark
+import numpy as np
+
+
+class HandDetector:
+    def __init__(
+        self,
+        model_path: str,
+        num_hands: int = 1,
+    ) -> None:
+        base_options = python.BaseOptions(model_asset_path=model_path)
+        options = vision.HandLandmarkerOptions(
+            base_options=base_options,
+            num_hands=num_hands,
+            running_mode=vision.RunningMode.VIDEO,
+        )
+        self._detector = vision.HandLandmarker.create_from_options(options)
+
+    def detect(
+        self,
+        frame: np.ndarray,
+        timestamp_ms: int | None = None,
+    ) -> list[list[NormalizedLandmark]]:
+        if timestamp_ms is None:
+            timestamp_ms = int(time.time() * 1000)
+        mp_image = mp.Image(image_format=mp.ImageFormat.SRGB, data=frame)
+        result = self._detector.detect_for_video(mp_image, timestamp_ms)
+        return result.hand_landmarks if result.hand_landmarks else []
+
+    def close(self) -> None:
+        self._detector.close()
+
+
+class Camera:
+    def __init__(self, index: int = 0) -> None:
+        self._cap = cv2.VideoCapture(index)
+
+    def read(self) -> tuple[bool, np.ndarray]:
+        ret, frame = self._cap.read()
+        return ret, frame
+
+    def release(self) -> None:
+        self._cap.release()
+
+
+class GestureDetector:
+    def __init__(
+        self,
+        detector: HandDetector,
+        gesture_callback: Callable[[list[NormalizedLandmark]], bool],
+    ) -> None:
+        self._detector = detector
+        self._callback = gesture_callback
+
+    def process_frame(self, frame: np.ndarray) -> bool | None:
+        hands = self._detector.detect(frame)
+        if hands:
+            return self._callback(hands[0])
+        return None
+
+    def close(self) -> None:
+        self._detector.close()
diff --git a/src/flipoff/events.py b/src/flipoff/events.py
new file mode 100644
index 0000000..f416ec0
--- /dev/null
+++ b/src/flipoff/events.py
@@ -0,0 +1,60 @@
+from abc import ABC
+from abc import abstractmethod
+import asyncio
+import os
+from typing import ClassVar
+
+
+class Event(ABC):
+    name: ClassVar[str] = "unknown"
+
+    @abstractmethod
+    async def trigger(self) -> None:
+        raise NotImplementedError
+
+
+class PoweroffEvent(Event):
+    name = "poweroff"
+    DEBUG: bool = os.environ.get("FLIPOFF_DRYRUN", "0") == "1"
+
+    async def trigger(self) -> None:
+        if self.DEBUG:
+            print("DRYRUN: Would power off")
+            return
+        try:
+            await self._poweroff()
+        except Exception as e:
+            print(f"Poweroff failed: {e}")
+
+    async def _poweroff(self) -> None:
+        from dbus_next.aio.message_bus import MessageBus
+        from dbus_next.constants import BusType
+
+        bus = await MessageBus(bus_type=BusType.SYSTEM).connect()
+        proxy = bus.get_proxy_object(
+            "org.freedesktop.login1",
+            "/org/freedesktop/login1",
+            None,
+        )
+        manager = proxy.get_interface("org.freedesktop.login1.Manager")
+        await manager.call_power_off(False)
+
+
+class EventRegistry:
+    _events: dict[str, type[Event]] = {}
+
+    @classmethod
+    def register(cls, event_class: type[Event]) -> type[Event]:
+        cls._events[event_class.name] = event_class
+        return event_class
+
+    @classmethod
+    def get(cls, name: str) -> type[Event] | None:
+        return cls._events.get(name)
+
+    @classmethod
+    def all(cls) -> dict[str, type[Event]]:
+        return cls._events.copy()
+
+
+EventRegistry.register(PoweroffEvent)
diff --git a/src/flipoff/gesture.py b/src/flipoff/gesture.py
new file mode 100644
index 0000000..f008d9d
--- /dev/null
+++ b/src/flipoff/gesture.py
@@ -0,0 +1,60 @@
+from dataclasses import dataclass
+from typing import Callable
+from typing import ClassVar
+
+from mediapipe.tasks.python.components.containers.landmark import NormalizedLandmark
+
+
+@dataclass
+class GestureResult:
+    name: str
+    detected: bool
+
+
+class Gesture:
+    name: ClassVar[str] = "unknown"
+
+    def detect(self, hand: list[NormalizedLandmark]) -> bool:
+        raise NotImplementedError
+
+
+class GestureRegistry:
+    _gestures: dict[str, type[Gesture]] = {}
+
+    @classmethod
+    def register(cls, gesture_class: type[Gesture]) -> type[Gesture]:
+        cls._gestures[gesture_class.name] = gesture_class
+        return gesture_class
+
+    @classmethod
+    def get(cls, name: str) -> type[Gesture] | None:
+        return cls._gestures.get(name)
+
+    @classmethod
+    def all(cls) -> dict[str, type[Gesture]]:
+        return cls._gestures.copy()
+
+
+def _check_y_values(
+    hand: list[NormalizedLandmark],
+    *indices: int,
+) -> bool:
+    for idx in indices:
+        if hand[idx].y is None:
+            return False
+    return True
+
+
+@GestureRegistry.register
+class FlippingOffGesture(Gesture):
+    name = "flipping_off"
+
+    def detect(self, hand: list[NormalizedLandmark]) -> bool:
+        if not _check_y_values(hand, 12, 10, 8, 6, 16, 14, 20, 18):
+            return False
+        return bool(
+            hand[12].y < hand[10].y
+            and hand[8].y > hand[6].y
+            and hand[16].y > hand[14].y
+            and hand[20].y > hand[18].y
+        )
diff --git a/uv.lock b/uv.lock
index 4967014..ef1b554 100644
--- a/uv.lock
+++ b/uv.lock
@@ -258,6 +258,13 @@ dependencies = [
     { name = "opencv-contrib-python" },
 ]
 
+[package.optional-dependencies]
+dev = [
+    { name = "black" },
+    { name = "isort" },
+    { name = "mypy" },
+]
+
 [package.dev-dependencies]
 dev = [
     { name = "black" },
@@ -267,11 +274,15 @@ dev = [
 
 [package.metadata]
 requires-dist = [
-    { name = "dbus-next" },
-    { name = "mediapipe" },
-    { name = "numpy" },
-    { name = "opencv-contrib-python" },
+    { name = "black", marker = "extra == 'dev'", specifier = ">=26.3.1" },
+    { name = "dbus-next", specifier = ">=0.2.3" },
+    { name = "isort", marker = "extra == 'dev'", specifier = ">=8.0.1" },
+    { name = "mediapipe", specifier = ">=0.10.33" },
+    { name = "mypy", marker = "extra == 'dev'", specifier = ">=1.20.0" },
+    { name = "numpy", specifier = ">=2.4.4" },
+    { name = "opencv-contrib-python", specifier = ">=4.13.0" },
 ]
+provides-extras = ["dev"]
 
 [package.metadata.requires-dev]
 dev = [