diff --git a/litellm-proxy-extras/litellm_proxy_extras/migrations/20260516210000_add_access_group_membership/migration.sql b/litellm-proxy-extras/litellm_proxy_extras/migrations/20260516210000_add_access_group_membership/migration.sql
new file mode 100644
index 00000000000..3ce733ddd0c
--- /dev/null
+++ b/litellm-proxy-extras/litellm_proxy_extras/migrations/20260516210000_add_access_group_membership/migration.sql
@@ -0,0 +1,15 @@
+-- CreateTable
+CREATE TABLE IF NOT EXISTS "LiteLLM_AccessGroupMembership" (
+    "id" TEXT NOT NULL,
+    "parent_group" TEXT NOT NULL,
+    "child_group" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "LiteLLM_AccessGroupMembership_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX IF NOT EXISTS "LiteLLM_AccessGroupMembership_parent_group_child_group_key" ON "LiteLLM_AccessGroupMembership"("parent_group", "child_group");
+
+-- CreateIndex
+CREATE INDEX IF NOT EXISTS "LiteLLM_AccessGroupMembership_parent_group_idx" ON "LiteLLM_AccessGroupMembership"("parent_group");
diff --git a/litellm-proxy-extras/litellm_proxy_extras/schema.prisma b/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
index b53507abe6a..219fd9ccbf8 100644
--- a/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
+++ b/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
@@ -1375,3 +1375,17 @@ model LiteLLM_WorkflowMessage {
   @@unique([run_id, sequence_number])
   @@index([run_id])
 }
+
+// Parent/child relationships between access groups. Used by
+// _get_models_from_access_groups to expand a parent group into its
+// transitively-included models. Resolution is depth-first with a
+// visited set; cyclic edges are logged and skipped at read time.
+model LiteLLM_AccessGroupMembership {
+  id           String   @id @default(uuid())
+  parent_group String
+  child_group  String
+  created_at   DateTime @default(now())
+
+  @@unique([parent_group, child_group])
+  @@index([parent_group])
+}
diff --git a/litellm/proxy/schema.prisma b/litellm/proxy/schema.prisma
index b53507abe6a..219fd9ccbf8 100644
--- a/litellm/proxy/schema.prisma
+++ b/litellm/proxy/schema.prisma
@@ -1375,3 +1375,17 @@ model LiteLLM_WorkflowMessage {
   @@unique([run_id, sequence_number])
   @@index([run_id])
 }
+
+// Parent/child relationships between access groups. Used by
+// _get_models_from_access_groups to expand a parent group into its
+// transitively-included models. Resolution is depth-first with a
+// visited set; cyclic edges are logged and skipped at read time.
+model LiteLLM_AccessGroupMembership {
+  id           String   @id @default(uuid())
+  parent_group String
+  child_group  String
+  created_at   DateTime @default(now())
+
+  @@unique([parent_group, child_group])
+  @@index([parent_group])
+}
diff --git a/schema.prisma b/schema.prisma
index b53507abe6a..219fd9ccbf8 100644
--- a/schema.prisma
+++ b/schema.prisma
@@ -1375,3 +1375,17 @@ model LiteLLM_WorkflowMessage {
   @@unique([run_id, sequence_number])
   @@index([run_id])
 }
+
+// Parent/child relationships between access groups. Used by
+// _get_models_from_access_groups to expand a parent group into its
+// transitively-included models. Resolution is depth-first with a
+// visited set; cyclic edges are logged and skipped at read time.
+model LiteLLM_AccessGroupMembership {
+  id           String   @id @default(uuid())
+  parent_group String
+  child_group  String
+  created_at   DateTime @default(now())
+
+  @@unique([parent_group, child_group])
+  @@index([parent_group])
+}