update

backend/agents.py

@@ -44,10 +44,11 @@ def provider_available(provider: str) -> bool:
     return True
 
 
-def kill_process(agent_key: str) -> None:
-    process = _active_processes.get(agent_key)
-    if process and process.returncode is None:
-        process.kill()
+def kill_process(agent_key_prefix: str) -> None:
+    """Killt alle aktiven Prozesse, deren Key mit dem Prefix beginnt (deckt -plan/-w1… ab)."""
+    for key, process in list(_active_processes.items()):
+        if key.startswith(agent_key_prefix) and process.returncode is None:
+            process.kill()
 
 
 async def run_agent(