diff --git a/supabase/migrations/20260711000015_phase4.sql b/supabase/migrations/20260711000015_phase4.sql
new file mode 100644
index 0000000..2608ac8
--- /dev/null
+++ b/supabase/migrations/20260711000015_phase4.sql
@@ -0,0 +1,10 @@
+-- Add effectiveness recheck round tracking to capa_actions
+ALTER TABLE capa_actions
+  ADD COLUMN IF NOT EXISTS effectiveness_recheck_round INT NOT NULL DEFAULT 0;
+
+-- WhatsApp credentials for Settings UI
+INSERT INTO app_settings (key, value, updated_at, updated_by)
+VALUES
+  ('META_WHATSAPP_PHONE_NUMBER_ID', '', now(), NULL),
+  ('META_WHATSAPP_ACCESS_TOKEN',    '', now(), NULL)
+ON CONFLICT (key) DO NOTHING;