@@ -0,0 +1,17 @@
+"""Sequential workflow execution on LangGraph.

@@ -0,0 +1,640 @@
+"""LangGraph compilation and sequential execution.

@@ -0,0 +1,93 @@
+"""Run file and result shapes.

@@ -0,0 +1,84 @@
+"""Single-writer persistence for run files.

@@ -0,0 +57,4 @@
+        path = self._path(run_id)
+        if not path.is_file():
+            raise ConfigError(f"unknown run: {run_id}")
+        return RunFile.from_dict(json.loads(path.read_text()))