Promote bridge, demo, craft_client to core birdcage package

Move bridge.py, demo.py, craft_client.py from tui/src/birdcage_tui/ to
src/birdcage/ so both TUI and MCP server can share the device layer
without a circular dependency on textual.

src/birdcage/__init__.py

@@ -1,6 +1,15 @@
 """birdcage: Winegard satellite dish control for amateur radio sky tracking."""
 
 from birdcage.antenna import AntennaConfig, BirdcageAntenna
+from birdcage.bridge import SerialBridge
+from birdcage.craft_client import (
+    CraftClient,
+    CraftTrackingState,
+    PassPrediction,
+    SearchResult,
+    TargetPosition,
+)
+from birdcage.demo import DemoCraftClient, DemoDevice
 from birdcage.leapfrog import apply_leapfrog
 from birdcage.protocol import (
     CarryoutG2Protocol,
@@ -16,11 +25,19 @@ __all__ = [
     "AntennaConfig",
     "BirdcageAntenna",
     "CarryoutG2Protocol",
+    "CraftClient",
+    "CraftTrackingState",
+    "DemoCraftClient",
+    "DemoDevice",
     "FirmwareProtocol",
     "HAL000Protocol",
     "HAL205Protocol",
+    "PassPrediction",
     "Position",
     "RssiReading",
     "RotctldServer",
+    "SearchResult",
+    "SerialBridge",
+    "TargetPosition",
     "apply_leapfrog",
 ]

src/birdcage/bridge.py

@@ -1,6 +1,6 @@
-"""Thread-safe bridge between Birdcage TUI and CarryoutG2Protocol.
+"""Thread-safe bridge between consumers and CarryoutG2Protocol.
 
-Wraps all serial I/O in a threading.Lock so the TUI's worker threads
+Wraps all serial I/O in a threading.Lock so concurrent callers
 don't stomp on each other. Tracks the current firmware submenu to
 minimize unnecessary q-then-reenter transitions.
 """
@@ -53,7 +53,7 @@ _MENU_COMMANDS: dict[Menu, str] = {
 
 
 class SerialBridge:
-    """Thread-safe wrapper around CarryoutG2Protocol for TUI consumption.
+    """Thread-safe wrapper around CarryoutG2Protocol.
 
     All public methods acquire a lock before touching the serial port.
     The bridge tracks the current firmware submenu so it can skip
@@ -68,7 +68,7 @@ class SerialBridge:
         self._connected = False
 
     # ------------------------------------------------------------------
-    # Menu prompt → string mapping for status display
+    # Menu prompt -> string mapping for status display
     # ------------------------------------------------------------------
 
     _MENU_PROMPTS: dict[Menu, str] = {
@@ -297,7 +297,7 @@ class SerialBridge:
             "el_accel": 0.0,
         }
 
-        # mv → "Max Vel [0] = 65.0  Max Vel [1] = 45.0" or similar
+        # mv -> "Max Vel [0] = 65.0  Max Vel [1] = 45.0" or similar
         vel_matches = re.findall(r"Max Vel\s*\[(\d)\]\s*=\s*(-?\d+\.?\d*)", mv_resp)
         for motor_id, val in vel_matches:
             if motor_id == "0":
@@ -305,7 +305,7 @@ class SerialBridge:
             elif motor_id == "1":
                 result["el_max_vel"] = float(val)
 
-        # ma → "Accel[0] = 400.0  Accel[1] = 400.0"
+        # ma -> "Accel[0] = 400.0  Accel[1] = 400.0"
         acc_matches = re.findall(r"Accel\[(\d)\]\s*=\s*(-?\d+\.?\d*)", ma_resp)
         for motor_id, val in acc_matches:
             if motor_id == "0":
@@ -316,7 +316,7 @@ class SerialBridge:
         return result
 
     def set_max_velocity(self, motor_id: int, deg_per_sec: float) -> None:
-        """Set max velocity for a motor axis (°/s). Firmware: MOT> mv [motor] [vel]."""
+        """Set max velocity for a motor axis (deg/s)."""
         with self._lock:
             self._ensure_menu(Menu.MOT)
             self._send(f"mv {motor_id} {deg_per_sec:.1f}")
@@ -324,7 +324,7 @@ class SerialBridge:
     def set_max_acceleration(self, motor_id: int, accel: float) -> None:
         """Set max acceleration for a motor axis.
 
-        Firmware: MOT> ma [motor] [accel] (°/s²).
+        Firmware: MOT> ma [motor] [accel] (deg/s^2).
         """
         with self._lock:
             self._ensure_menu(Menu.MOT)
@@ -460,7 +460,7 @@ class SerialBridge:
         Args:
             start_az: Starting azimuth in degrees.
             span: Total sweep width in degrees.
-            step_cdeg: Step size in centidegrees (100 = 1.00°).
+            step_cdeg: Step size in centidegrees (100 = 1.00 deg).
             num_xponders: Number of transponders to cycle per position.
             timeout: Serial read timeout for the long-running command.
 

src/birdcage/craft_client.py

@@ -2,7 +2,7 @@
 
 Provides satellite search, pass predictions, and real-time sky positions
 from the Craft orbital mechanics API. All methods are blocking — designed
-to be called from @work(thread=True) workers in the TUI.
+to be called from worker threads.
 
 Uses urllib.request + json only (no requests/httpx dependency).
 """

src/birdcage/demo.py

@@ -1,4 +1,4 @@
-"""Synthetic demo device for the Birdcage TUI.
+"""Synthetic demo device for Birdcage.
 
 Drop-in replacement for SerialBridge that simulates a Winegard Carryout G2
 dish with motor movement, RSSI signal modeling, and canned firmware responses.
@@ -16,7 +16,7 @@ import random
 import time
 from enum import Enum, auto
 
-from birdcage_tui.craft_client import PassPrediction, SearchResult, TargetPosition
+from birdcage.craft_client import PassPrediction, SearchResult, TargetPosition
 
 
 class _DemoMenu(Enum):
@@ -812,14 +812,14 @@ def _leo_position(target_id: str, t: float) -> tuple[float, float]:
     """
     offset, period, max_el = _LEO_ARCS.get(target_id, (0.0, 10.0, 40.0))
     period_sec = period * 60.0
-    phase = ((t + offset * 60.0) % period_sec) / period_sec  # 0.0 → 1.0
+    phase = ((t + offset * 60.0) % period_sec) / period_sec  # 0.0 -> 1.0
 
     # Visible window: phase 0.0-0.5 = above horizon, 0.5-1.0 = below
     if phase > 0.5:
         return 0.0, -10.0  # Below horizon
 
-    # Map 0→0.5 to AZ 90→270, EL 0→max→0 (sine arc)
+    # Map 0->0.5 to AZ 90->270, EL 0->max->0 (sine arc)
-    arc_phase = phase / 0.5  # 0.0 → 1.0 through the visible pass
+    arc_phase = phase / 0.5  # 0.0 -> 1.0 through the visible pass
     az = 90.0 + 180.0 * arc_phase
     el = max_el * math.sin(math.pi * arc_phase)
     return az, el

tui/src/birdcage_tui/app.py

@@ -102,15 +102,14 @@ class BirdcageApp(App):
     def _setup_device(self) -> None:
         """Create device (demo or real) and hand it to each screen."""
         if self.demo_mode:
-            from birdcage_tui.demo import DemoDevice
+            from birdcage.demo import DemoDevice
 
             self.device = DemoDevice()
             self.device.connect()
         else:
+            from birdcage.bridge import SerialBridge
             from birdcage.protocol import get_protocol
 
-            from birdcage_tui.bridge import SerialBridge
-
             protocol = get_protocol(self.firmware_name)
             self.device = SerialBridge(protocol)
             self.device.connect(self.serial_port)
@@ -142,11 +141,11 @@ class BirdcageApp(App):
     def _setup_craft_client(self) -> None:
         """Create a Craft API client and hand it to the control screen."""
         if self.demo_mode:
-            from birdcage_tui.demo import DemoCraftClient
+            from birdcage.demo import DemoCraftClient
 
             client = DemoCraftClient()
         else:
-            from birdcage_tui.craft_client import CraftClient
+            from birdcage.craft_client import CraftClient
 
             client = CraftClient(base_url=self.craft_url)
         try:

tui/src/birdcage_tui/screens/control.py

@@ -9,6 +9,7 @@ import contextlib
 import logging
 import threading
 
+from birdcage.craft_client import CraftClient, CraftTrackingState
 from textual import work
 from textual.app import ComposeResult
 from textual.binding import Binding
@@ -16,7 +17,6 @@ from textual.containers import Container, Horizontal, Vertical
 from textual.widgets import Button, ContentSwitcher, Input, Static
 from textual.worker import Worker
 
-from birdcage_tui.craft_client import CraftClient, CraftTrackingState
 from birdcage_tui.rotctld_server import TrackingState, TuiRotctldServer
 from birdcage_tui.widgets.compass_rose import CompassRose
 from birdcage_tui.widgets.craft_panel import CraftPanel

tui/tests/test_craft_mode.py

@@ -13,7 +13,7 @@ from unittest.mock import MagicMock
 import pytest
 
 from birdcage_tui.app import BirdcageApp
-from birdcage_tui.craft_client import PassPrediction, SearchResult, TargetPosition
+from birdcage.craft_client import PassPrediction, SearchResult, TargetPosition
 from birdcage_tui.screens.control import ControlScreen
 from birdcage_tui.widgets.craft_panel import CraftPanel, CraftTrackingStatus