diff --git a/tasks.py b/tasks.py
index 6b98f54..4690e5c 100644
--- a/tasks.py
+++ b/tasks.py
@@ -22,6 +22,7 @@ from celery_app import app
 from artdag import DAG, Node, NodeType
 from artdag.engine import Engine
 from artdag.executor import register_executor, Executor, get_executor
+import artdag.nodes  # Register all built-in executors (SOURCE, EFFECT, etc.)
 
 # Add effects to path (use env var in Docker, fallback to home dir locally)
 EFFECTS_PATH = Path(os.environ.get("EFFECTS_PATH", str(Path.home() / "artdag-effects")))