refactor stage 1

detect/checkpoint/replay.py

@@ -12,7 +12,13 @@ import logging
 import uuid
 
 from detect import emit
-from detect.checkpoint import load_checkpoint, list_checkpoints
+# TODO: migrate to Timeline/Branch/Checkpoint model
+# These old functions no longer exist — replay needs rework
+def _not_migrated(*args, **kwargs):
+    raise NotImplementedError("Replay not yet migrated to Timeline/Branch/Checkpoint model")
+
+load_checkpoint = _not_migrated
+list_checkpoints = _not_migrated
 from detect.graph import NODES, build_graph
 
 logger = logging.getLogger(__name__)