diff --git a/scripts/git-incremental-deploy.ps1 b/scripts/git-incremental-deploy.ps1
index 888dcef..61203eb 100644
--- a/scripts/git-incremental-deploy.ps1
+++ b/scripts/git-incremental-deploy.ps1
@@ -1504,6 +1504,7 @@ const expectedMigrationNames = new Set([
   '20260820_add_ding_workflow_snapshots',
   '20260824_expand_ding_workflow_insights',
   '20260826_add_ding_workflow_demand_type',
+  '20260827_add_ding_workflow_detail_fields',
 ]);
 if (migrations.length !== expectedMigrationNames.size
   || migrations.some((item) => !expectedMigrationNames.has(item && item.name)
diff --git a/scripts/git-incremental-deploy.test.mjs b/scripts/git-incremental-deploy.test.mjs
index fab6188..ee113a4 100644
--- a/scripts/git-incremental-deploy.test.mjs
+++ b/scripts/git-incremental-deploy.test.mjs
@@ -52,3 +52,13 @@ test('deployment SSH hops keep long builds and cutovers alive', () => {
     assert.match(source, /TCPKeepAlive=yes/)
   }
 })
+
+test('migration deployment gate recognizes the latest approved schema migration', () => {
+  const source = readFileSync(new URL('./git-incremental-deploy.ps1', import.meta.url), 'utf8')
+  const gateStart = source.indexOf('const expectedMigrationNames = new Set([')
+  const gateEnd = source.indexOf(']);', gateStart)
+
+  assert.ok(gateStart >= 0 && gateEnd > gateStart, 'migration gate list is missing')
+  const gate = source.slice(gateStart, gateEnd)
+  assert.match(gate, /20260827_add_ding_workflow_detail_fields/)
+})