diff --git a/galaxy/client/support/status_manager.py b/galaxy/client/support/status_manager.py
index a5b149c0e..3fd50c8fd 100644
--- a/galaxy/client/support/status_manager.py
+++ b/galaxy/client/support/status_manager.py
@@ -9,7 +9,8 @@
 """
 
 import logging
-from typing import Dict, List, Optional, Any
+import time
+from typing import Any, Dict, List, Optional
 
 from ..device_manager import ConstellationDeviceManager
 from ..config_loader import ConstellationConfig
@@ -39,6 +40,10 @@ def __init__(
         self.pending_task_tracker = pending_task_tracker or {}
         self.logger = logging.getLogger(f"{__name__}.StatusManager")
 
+        # Completed task tracking: task_id -> {success, execution_time, completed_at}
+        self._completed_tasks: Dict[str, Dict[str, Any]] = {}
+        self._failed_tasks: Dict[str, Dict[str, Any]] = {}
+
     def get_device_status(self, device_id: Optional[str] = None) -> Dict[str, Any]:
         """
         Get device status information.
@@ -165,23 +170,62 @@ def get_device_health_summary(self) -> Dict[str, Any]:
 
         return health_summary
 
+    def record_task_completion(
+        self,
+        task_id: str,
+        success: bool,
+        execution_time: Optional[float] = None,
+    ) -> None:
+        """
+        Record the outcome of a completed task.
+
+        Call this after each task finishes so that get_task_statistics()
+        can return accurate success rates and timing information.
+
+        :param task_id: Unique task identifier
+        :param success: True if the task succeeded, False if it failed
+        :param execution_time: Wall-clock seconds the task took, or None if unknown
+        """
+        record: Dict[str, Any] = {
+            "task_id": task_id,
+            "completed_at": time.time(),
+            "execution_time": execution_time,
+        }
+        if success:
+            self._completed_tasks[task_id] = record
+        else:
+            self._failed_tasks[task_id] = record
+
     def get_task_statistics(self) -> Dict[str, Any]:
         """
         Get task execution statistics.
 
         :return: Task statistics
         """
-        # Note: This is a basic implementation. In a full system, you'd track
-        # completed tasks, success rates, execution times, etc.
+        total_done = len(self._completed_tasks) + len(self._failed_tasks)
+        success_rate = (
+            len(self._completed_tasks) / total_done if total_done > 0 else 0.0
+        )
+
+        execution_times = [
+            r["execution_time"]
+            for r in list(self._completed_tasks.values())
+            + list(self._failed_tasks.values())
+            if r.get("execution_time") is not None
+        ]
+        average_execution_time = (
+            sum(execution_times) / len(execution_times) if execution_times else 0.0
+        )
+
         return {
             "pending_tasks": len(self.pending_task_tracker),
             "task_queue_health": (
                 "healthy" if len(self.pending_task_tracker) < 100 else "overloaded"
             ),
-            # TODO: Add completed task tracking
-            "completed_tasks": 0,
-            "success_rate": 0.0,
-            "average_execution_time": 0.0,
+            "completed_tasks": len(self._completed_tasks),
+            "failed_tasks": len(self._failed_tasks),
+            "success_rate": round(success_rate, 3),
+            "average_execution_time": round(average_execution_time, 3),
         }
 
     def get_performance_metrics(self) -> Dict[str, Any]: