diff --git a/codex-rs/state/migrations/0017_phase2_selection_flag.sql b/codex-rs/state/migrations/0017_phase2_selection_flag.sql
new file mode 100644
index 000000000..1d95d9a40
--- /dev/null
+++ b/codex-rs/state/migrations/0017_phase2_selection_flag.sql
@@ -0,0 +1,2 @@
+ALTER TABLE stage1_outputs
+ADD COLUMN selected_for_phase2 INTEGER NOT NULL DEFAULT 0;