a

core/schema/models/checkpoint.py

@@ -11,25 +11,24 @@ class Checkpoint:
     """
     A snapshot of pipeline state on a timeline.
 
-    Stage outputs stored as JSONB — each stage serializes to JSON,
-    the checkpoint stores it without knowing the shape.
-
     parent_id forms a tree: multiple children from the same parent
     = different config tries from the same starting point.
+
+    Stage outputs are stored separately in StageOutput table,
+    not carried in the checkpoint itself.
     """
 
     id: UUID
     timeline_id: UUID
-    job_id: Optional[UUID] = None  # which job created this checkpoint
-    parent_id: Optional[UUID] = None  # null = root checkpoint
+    job_id: Optional[UUID] = None
+    parent_id: Optional[UUID] = None
 
-    # Stage outputs — JSONB per stage, opaque to the checkpoint layer
-    stage_outputs: Dict[str, Any] = field(default_factory=dict)
+    stage_name: str = ""  # which stage produced this checkpoint
 
     # Config that produced this checkpoint
     config_overrides: Dict[str, Any] = field(default_factory=dict)
 
-    # Pipeline state
+    # Pipeline stats at this point
     stats: Dict[str, Any] = field(default_factory=dict)
 
     # Scenario bookmark