diff --git a/backend/src/backend/scripts.py b/backend/src/backend/scripts.py
index 9d099dd..7f03d51 100644
--- a/backend/src/backend/scripts.py
+++ b/backend/src/backend/scripts.py
@@ -103,13 +103,22 @@ def safe_script_name(value: str, script_type: str) -> str:
 def _jupyter_path(script_type: str, script_id: str) -> str:
     """Return the in-Jupyter path used for a script.
 
-    The path is ``notebooks/{script_id}.{ext}`` — deterministic and
-    collision-free because ``script_id`` is a fresh ULID. The user's
-    ``script_name`` is kept on the Scripts row as a display label only;
-    the on-disk filename is owned by the database.
+    The path is ``{script_id}.{ext}`` — deterministic and
+    collision-free because ``script_id`` is a fresh ULID. Jupyter's
+    contents API treats the suffix after ``/api/contents/`` as a path
+    relative to its ``--notebook-dir`` (the workspace root), so a
+    ``notebooks/`` prefix here would push the file into a non-existent
+    ``notebooks/`` subdir on disk. The user's ``script_name`` is kept on
+    the Scripts row as a display label only; the on-disk filename is
+    owned by the database.
+
+    The ``/notebooks/`` segment in the user's browser URL
+    (``/jupyter/<ws>/notebooks/<file>.ipynb``) is jupyter's URL route
+    for the editor view, not a filesystem path — jupyter routes that
+    URL to the file at the workspace root.
     """
     ext = ".ipynb" if script_type == "notebook" else ".py"
-    return f"notebooks/{script_id}{ext}"
+    return f"{script_id}{ext}"
 
 
 def validate_script_content(content: str, script_type: str) -> bytes: