diff --git a/sandbox.json b/sandbox.json
new file mode 100644
index 000000000..0ec3f9413
--- /dev/null
+++ b/sandbox.json
@@ -0,0 +1,4 @@
+{
+  "provider": "local",
+  "working_directory": "/var/folders/nm/bd2dwzy52t1ckn3tklsfmy1c0000gn/T/.tmpjE7kbJ/fabro-data/runs/20260328-dry-run-01KMTXZVMHB7NS0AJ9XWPMDX1B/worktree"
+}
\ No newline at end of file
diff --git a/start.json b/start.json
new file mode 100644
index 000000000..e03395545
--- /dev/null
+++ b/start.json
@@ -0,0 +1,6 @@
+{
+  "run_id": "01KMTXZVMHB7NS0AJ9XWPMDX1B",
+  "start_time": "2026-03-28T19:16:02.018819Z",
+  "run_branch": "fabro/run/01KMTXZVMHB7NS0AJ9XWPMDX1B",
+  "base_sha": "ad33264a1c9ac36120f8aab91c18cc21ae6a0076"
+}
\ No newline at end of file