diff --git a/supabase/migrations/20260106183631_add_homepage_default_to_identities.sql b/supabase/migrations/20260106183631_add_homepage_default_to_identities.sql
new file mode 100644
index 00000000..e685ac4c
--- /dev/null
+++ b/supabase/migrations/20260106183631_add_homepage_default_to_identities.sql
@@ -0,0 +1,34 @@
+-- Function to create homepage infrastructure for new identities
+-- Replicates the logic from createIdentity TypeScript function
+-- Returns the permission token ID to be used as home_page
+CREATE OR REPLACE FUNCTION create_identity_homepage()
+RETURNS uuid AS $$
+DECLARE
+    new_entity_set_id uuid;
+    new_entity_id uuid;
+    new_permission_token_id uuid;
+BEGIN
+    -- Create a new entity set
+    INSERT INTO entity_sets DEFAULT VALUES
+    RETURNING id INTO new_entity_set_id;
+
+    -- Create a root entity and add it to that entity set
+    new_entity_id := gen_random_uuid();
+    INSERT INTO entities (id, set)
+    VALUES (new_entity_id, new_entity_set_id);
+
+    -- Create a new permission token
+    INSERT INTO permission_tokens (root_entity)
+    VALUES (new_entity_id)
+    RETURNING id INTO new_permission_token_id;
+
+    -- Give the token full permissions on that entity set
+    INSERT INTO permission_token_rights (token, entity_set, read, write, create_token, change_entity_set)
+    VALUES (new_permission_token_id, new_entity_set_id, true, true, true, true);
+
+    RETURN new_permission_token_id;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Set the function as the default value for home_page column
+ALTER TABLE identities ALTER COLUMN home_page SET DEFAULT create_identity_homepage();