backend/app/api/routes.py

@@ -157,6 +157,50 @@ async def get_task_status(task_id: str):
     return TaskStatusResponse(**task)
 
 
+@router.delete("/task/{task_id}/cleanup")
+async def cleanup_task(task_id: str):
+    """
+    Manually cleanup a completed/failed task from Redis storage.
+    
+    This endpoint allows the frontend to proactively delete task data
+    after the user has saved the results locally or to cloud storage.
+    This helps keep Redis storage clean and reduces memory usage.
+    
+    Note: Tasks are also automatically cleaned up 10 minutes after
+    completion/failure, so calling this endpoint is optional but recommended.
+    
+    Args:
+        task_id: Task identifier
+    
+    Returns:
+        Success message
+    
+    Raises:
+        HTTPException: If task not found
+    """
+    task = task_manager.get_task_status(task_id)
+    
+    if not task:
+        raise HTTPException(status_code=404, detail=f"Task {task_id} not found")
+    
+    # Only allow cleanup of completed or failed tasks
+    if task.get("status") not in ["completed", "failed"]:
+        raise HTTPException(
+            status_code=400, 
+            detail=f"Can only cleanup completed or failed tasks. Current status: {task.get('status')}"
+        )
+    
+    # Delete from both Redis and in-memory storage
+    task_manager.delete_task(task_id)
+    logger.info(f"🧹 Task {task_id} manually cleaned up from storage")
+    
+    return {
+        "success": True,
+        "message": f"Task {task_id} has been cleaned up from storage",
+        "task_id": task_id
+    }
+
+
 @router.get("/tickers")
 async def get_tickers():
     """Get list of popular tickers (example endpoint)"""

backend/app/services/task_manager.py

@@ -39,7 +39,8 @@ class HybridTaskManager:
         self._tasks: Dict[str, Dict[str, Any]] = {}
         self._lock = threading.RLock()
         self._cleanup_interval = 3600  # 1 hour
-        self._task_expiry = 86400  # 24 hours
+        self._task_expiry = 86400  # 24 hours for pending/running tasks
+        self._completed_task_expiry = 600  # 10 minutes for completed/failed tasks (auto cleanup)
         
         # Check Redis availability on startup
         if is_redis_available():
@@ -79,15 +80,23 @@ class HybridTaskManager:
             for key in expired_keys:
                 del self._tasks[key]
     
-    def _save_to_storage(self, task_id: str, task_data: dict):
-        """Save task to both Redis (if available) and in-memory"""
+    def _save_to_storage(self, task_id: str, task_data: dict, use_short_expiry: bool = False):
+        """
+        Save task to both Redis (if available) and in-memory.
+        
+        Args:
+            task_id: Task ID
+            task_data: Task data dictionary
+            use_short_expiry: If True, use shorter TTL for completed/failed tasks
+        """
         # Always save to in-memory (fast access)
         with self._lock:
             self._tasks[task_id] = task_data
         
         # Also save to Redis if available (persistence)
         if is_redis_available():
-            save_task_to_redis(task_id, task_data, self._task_expiry)
+            expiry = self._completed_task_expiry if use_short_expiry else self._task_expiry
+            save_task_to_redis(task_id, task_data, expiry)
     
     def _get_from_storage(self, task_id: str) -> Optional[dict]:
         """Get task from in-memory first, then Redis"""
@@ -165,7 +174,10 @@ class HybridTaskManager:
     
     def set_task_result(self, task_id: str, result: Any):
         """
-        Set task result and mark as completed
+        Set task result and mark as completed.
+        
+        Note: Completed tasks will be automatically cleaned up from Redis
+        after a short TTL (10 minutes by default) to free up space.
         
         Args:
             task_id: Task ID
@@ -177,11 +189,16 @@ class HybridTaskManager:
             task_data["result"] = result
             task_data["progress"] = "Analysis completed"
             task_data["completed_at"] = datetime.now().isoformat()
-            self._save_to_storage(task_id, task_data)
+            # Save with shorter TTL for auto cleanup
+            self._save_to_storage(task_id, task_data, use_short_expiry=True)
+            logger.info(f"✅ Task {task_id} completed, will be auto-cleaned from Redis in {self._completed_task_expiry} seconds")
     
     def set_task_error(self, task_id: str, error: str):
         """
-        Set task error and mark as failed
+        Set task error and mark as failed.
+        
+        Note: Failed tasks will be automatically cleaned up from Redis
+        after a short TTL (10 minutes by default) to free up space.
         
         Args:
             task_id: Task ID
@@ -193,7 +210,9 @@ class HybridTaskManager:
             task_data["error"] = error
             task_data["progress"] = "Analysis failed"
             task_data["failed_at"] = datetime.now().isoformat()
-            self._save_to_storage(task_id, task_data)
+            # Save with shorter TTL for auto cleanup
+            self._save_to_storage(task_id, task_data, use_short_expiry=True)
+            logger.info(f"❌ Task {task_id} failed, will be auto-cleaned from Redis in {self._completed_task_expiry} seconds")
     
     def get_task(self, task_id: str) -> Optional[Dict[str, Any]]:
         """

frontend/app/analysis/page.tsx

@@ -61,6 +61,8 @@ export default function AnalysisPage() {
           console.log("☁️ Auto-saved report to cloud");
         }
       }
+      // Note: Redis cleanup is handled immediately when analysis completes
+      // in useAnalysis hook, so no need to cleanup here
     } catch (error) {
       console.error("Auto-save failed:", error);
     }

frontend/app/analysis/results/page.tsx

@@ -164,6 +164,8 @@ export default function AnalysisResultsPage() {
           setSavedToCloud(true);
         }
       }
+      // Note: Redis cleanup is handled immediately when analysis completes
+      // in useAnalysis hook, so no need to cleanup here
       
       setSaveSuccess(true);
       // Reset success message after 3 seconds

frontend/hooks/useAnalysis.ts

@@ -42,6 +42,16 @@ export function useAnalysis() {
         const { clearPendingTask } = await import('@/lib/pending-task');
         clearPendingTask();
         
+        // 🧹 Immediately cleanup Redis cache after receiving result
+        // The result is already stored in React state, so Redis data is no longer needed
+        try {
+          await api.cleanupTask(id);
+          console.log("🧹 Redis cache cleaned up immediately after analysis completed");
+        } catch (cleanupErr) {
+          // Silently fail - cleanup is optional, task will auto-expire anyway
+          console.warn("Redis cleanup failed (will auto-expire):", cleanupErr);
+        }
+        
         // Stop polling
         if (pollingIntervalRef.current) {
           clearInterval(pollingIntervalRef.current);
@@ -70,6 +80,14 @@ export function useAnalysis() {
         const { clearPendingTask } = await import('@/lib/pending-task');
         clearPendingTask();
         
+        // 🧹 Cleanup Redis cache for failed task
+        try {
+          await api.cleanupTask(id);
+          console.log("🧹 Redis cache cleaned up after analysis failed");
+        } catch (cleanupErr) {
+          console.warn("Redis cleanup failed (will auto-expire):", cleanupErr);
+        }
+        
         // Stop polling
         if (pollingIntervalRef.current) {
           clearInterval(pollingIntervalRef.current);

frontend/lib/api.ts

@@ -63,4 +63,21 @@ export const api = {
     const response = await apiClient.get<{ tickers: Ticker[] }>("/api/tickers");
     return response.data;
   },
+
+  /**
+   * Cleanup task from Redis storage after saving results
+   * This helps keep Redis memory usage low
+   */
+  async cleanupTask(taskId: string): Promise<{ success: boolean; message: string }> {
+    try {
+      const response = await apiClient.delete<{ success: boolean; message: string; task_id: string }>(
+        `/api/task/${taskId}/cleanup`
+      );
+      return response.data;
+    } catch (error) {
+      // Silently fail - cleanup is optional, task will auto-expire anyway
+      console.warn("Task cleanup failed (will auto-expire in 10 minutes):", error);
+      return { success: false, message: "Cleanup failed silently" };
+    }
+  },
 };