diff --git a/backend/neural_mesh/agents/yabai_window_manager.py b/backend/neural_mesh/agents/yabai_window_manager.py
new file mode 100644
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+++ b/backend/neural_mesh/agents/yabai_window_manager.py
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+"""
+JARVIS Ghost Monitor Protocol - Yabai Window Manager (v1.0)
+===========================================================
+
+Part of the Patent-Pending "Ghost Monitor Architecture".
+
+This module implements the "Exile" and "Boomerang" protocols for:
+1.  Moving windows to the Shadow Realm (Display 2) for isolated monitoring.
+2.  Summoning windows back to the user's focus when needed (Boomerang).
+3.  Maintaining "Single-Seat Concurrency" (user is never interrupted).
+
+Core Components:
+- Shadow Realm (v53): Virtual display isolation.
+- Exile Protocol: Move to Display 2.
+- Boomerang Protocol (v63): Auto-summon via OS signals.
+- The Reaper: State convergence (implemented in YabaiSpaceDetector, to be integrated).
+
+Directives:
+- Treat Display 2 as a privileged, secure execution environment.
+- Strict adherence to Single-Seat Concurrency.
+"""
+
+import asyncio
+import logging
+import os
+import json
+from typing import Dict, List, Optional, Tuple, Any
+from dataclasses import dataclass
+
+# Setup logging
+logger = logging.getLogger(__name__)
+
+@dataclass
+class WindowState:
+    window_id: int
+    app_name: str
+    title: str
+    original_space: int
+    original_frame: Dict[str, float]
+    exiled_at: float
+
+class YabaiWindowManager:
+    def __init__(self):
+        self.yabai_path = os.getenv("YABAI_PATH", "/opt/homebrew/bin/yabai")
+        self.shadow_display_index = 2  # The Ghost Display
+        self.exiled_windows: Dict[int, WindowState] = {}
+        
+        # State Convergence (The Reaper)
+        self._convergence_lock = asyncio.Lock()
+
+    async def _run_yabai(self, args: List[str]) -> Tuple[bool, str]:
+        """Execute yabai command safely."""
+        try:
+            cmd = [self.yabai_path] + args
+            proc = await asyncio.create_subprocess_exec(
+                *cmd,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+            stdout, stderr = await proc.communicate()
+            
+            if proc.returncode != 0:
+                return False, stderr.decode().strip()
+            return True, stdout.decode().strip()
+        except Exception as e:
+            return False, str(e)
+
+    async def ensure_shadow_realm(self) -> bool:
+        """Verify Display 2 (Shadow Realm) is active."""
+        success, output = await self._run_yabai(["-m", "query", "--displays"])
+        if not success:
+            logger.error(f"[GhostMonitor] Failed to query displays: {output}")
+            return False
+            
+        try:
+            displays = json.loads(output)
+            # Check if we have at least 2 displays
+            if len(displays) < 2:
+                logger.warning("[GhostMonitor] Shadow Realm (Display 2) not found!")
+                return False
+                
+            # Verify Display 2 is valid
+            shadow = next((d for d in displays if d["index"] == self.shadow_display_index), None)
+            if shadow:
+                return True
+            return False
+        except Exception as e:
+            logger.error(f"[GhostMonitor] Error parsing display info: {e}")
+            return False
+
+    async def exile_window(self, window_id: int) -> bool:
+        """
+        Exile Protocol: Move window to Display 2 (Shadow Realm).
+        """
+        logger.info(f"[GhostMonitor] 🌑 Exiling window {window_id} to Shadow Realm")
+        
+        async with self._convergence_lock:
+            # 1. Get current state for "Boomerang" later
+            success, win_info = await self._get_window_info(window_id)
+            if not success or not win_info:
+                logger.error(f"[GhostMonitor] Failed to get info for window {window_id}")
+                return False
+
+            # 2. Store state
+            self.exiled_windows[window_id] = WindowState(
+                window_id=window_id,
+                app_name=win_info.get("app", "Unknown"),
+                title=win_info.get("title", ""),
+                original_space=win_info.get("space", 1),
+                original_frame=win_info.get("frame", {}),
+                exiled_at=asyncio.get_event_loop().time()
+            )
+
+            # 3. Move to Display 2
+            # Use --display 2 to move across spaces/displays
+            success, msg = await self._run_yabai(["-m", "window", str(window_id), "--display", str(self.shadow_display_index)])
+            if not success:
+                logger.error(f"[GhostMonitor] Failed to move window {window_id}: {msg}")
+                return False
+
+            # 4. Maximize on Shadow Realm (Retina Mosaic preparation)
+            # Use grid 1:1:0:0:1:1 to fill screen
+            await self._run_yabai(["-m", "window", str(window_id), "--grid", "1:1:0:0:1:1"])
+            
+            return True
+
+    async def boomerang_window(self, window_id: int) -> bool:
+        """
+        Boomerang Protocol (v63): Auto-summon window back to user.
+        Uses OS signals/focus to bring it back.
+        """
+        logger.info(f"[GhostMonitor] 🪃 Boomerang: Summoning window {window_id}")
+        
+        async with self._convergence_lock:
+            if window_id not in self.exiled_windows:
+                logger.warning(f"[GhostMonitor] Window {window_id} not known in Exile logs")
+                # Proceed anyway if it's on Display 2?
+            
+            # 1. Move back to Display 1 (or original display if we knew it)
+            # We assume Display 1 is the user's primary
+            success, msg = await self._run_yabai(["-m", "window", str(window_id), "--display", "1"])
+            if not success:
+                logger.error(f"[GhostMonitor] Boomerang failed for {window_id}: {msg}")
+                return False
+
+            # 2. Focus the window
+            await self._run_yabai(["-m", "window", str(window_id), "--focus"])
+            
+            # 3. Clean up state
+            if window_id in self.exiled_windows:
+                del self.exiled_windows[window_id]
+                
+            return True
+
+    async def _get_window_info(self, window_id: int) -> Tuple[bool, Optional[Dict]]:
+        success, output = await self._run_yabai(["-m", "query", "--windows", "--id", str(window_id)])
+        if not success:
+            return False, None
+        try:
+            return True, json.loads(output)
+        except:
+            return False, None
+