diff --git a/.gitignore b/.gitignore
index c81eb68..8abfdc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,11 @@ sound_algo/*.log
 
 # ML model weights downloaded at runtime
 *.pt
+*.ckpt
+*.safetensors
+*.mlpackage
+*.onnx
+*.gguf
 
 # Claude MCP artifacts
 .playwright-mcp/
diff --git a/launcher/Sources/AVLiveLauncher/ProcessManager.swift b/launcher/Sources/AVLiveLauncher/ProcessManager.swift
index 701cdeb..35fee95 100644
--- a/launcher/Sources/AVLiveLauncher/ProcessManager.swift
+++ b/launcher/Sources/AVLiveLauncher/ProcessManager.swift
@@ -775,4 +775,9 @@ final class ProcessManager: ObservableObject {
             }
         }
     }
+
+    deinit {
+        sentinelTimer?.invalidate()
+        sentinelTimer = nil
+    }
 }