diff --git a/server/app/goauto/migrations/migrate.go b/server/app/goauto/migrations/migrate.go
index e18f18d..254c3a1 100644
--- a/server/app/goauto/migrations/migrate.go
+++ b/server/app/goauto/migrations/migrate.go
@@ -8,8 +8,11 @@ import (
 
 // Migrate creates the complete GoAuto MVP schema. AutoMigrate is intentionally
 // kept behind this package so the CLI migration and tests use the same model set.
-func Migrate(db *gorm.DB) error {
-	return db.AutoMigrate(
+// MigratedModels is the single source of truth for which models make up the
+// schema, so tests can assert repo-wide conventions over exactly the set that
+// Migrate creates rather than a hand-maintained copy that drifts.
+func MigratedModels() []any {
+	return []any{
 		&models.AgentDevice{},
 		&models.PDDProduct{},
 		&models.ShopeeProduct{},
@@ -22,5 +25,9 @@ func Migrate(db *gorm.DB) error {
 		&models.CollectionColorPrice{},
 		&models.CollectionSKU{},
 		&models.CollectionSKUValue{},
-	)
+	}
+}
+
+func Migrate(db *gorm.DB) error {
+	return db.AutoMigrate(MigratedModels()...)
 }
diff --git a/server/app/goauto/migrations/migrate_test.go b/server/app/goauto/migrations/migrate_test.go
index 3fc8570..8de548d 100644
--- a/server/app/goauto/migrations/migrate_test.go
+++ b/server/app/goauto/migrations/migrate_test.go
@@ -359,3 +359,20 @@ func TestMySQLTextJSONBlobColumnsHaveNoLiteralDefault(t *testing.T) {
 		}
 	}
 }
+
+// 仓库约定：所有 GoAuto 模型显式声明单数表名。漏写 TableName() 时 gorm 会
+// 悄悄用复数（syb_session -> syb_sessions），迁移照样成功，直到有人按约定的
+// 名字写查询才会发现。这里对迁移清单里的每个模型逐一核对。
+func TestEveryModelDeclaresSingularTableName(t *testing.T) {
+	type tableNamer interface{ TableName() string }
+	for _, model := range migrations.MigratedModels() {
+		namer, ok := model.(tableNamer)
+		if !ok {
+			t.Fatalf("%T 没有声明 TableName()，gorm 会用复数表名", model)
+		}
+		name := namer.TableName()
+		if strings.HasSuffix(name, "s") && !strings.HasSuffix(name, "ss") {
+			t.Fatalf("%T 的表名 %q 像复数，仓库约定用单数", model, name)
+		}
+	}
+}
diff --git a/server/app/goauto/models/schema.go b/server/app/goauto/models/schema.go
index 06aecbc..962a00c 100644
--- a/server/app/goauto/models/schema.go
+++ b/server/app/goauto/models/schema.go
@@ -380,6 +380,8 @@ type SYBProduct struct {
 
 func (SYBProduct) TableName() string { return "syb_product" }
 
+func (SYBSession) TableName() string { return "syb_session" }
+
 func (product *SYBProduct) BeforeCreate(_ *gorm.DB) error {
 	if product.RawJSON == "" {
 		product.RawJSON = "{}"