diff --git a/src/backend/services/index.ts b/src/backend/services/index.ts
index 330ba7cb1..1d6e72b24 100644
--- a/src/backend/services/index.ts
+++ b/src/backend/services/index.ts
@@ -123,6 +123,7 @@ export const puterServices = {
     userAccount: UserAccountService,
     // Leaf: team + user stores only.
     team: TeamService,
+    // Reaches `team` and `socket` at call time only.
     signup: SignupService,
     // AppPermissionService + SubdomainPermissionService register permission
     // rewriters/implicators only; no runtime state. Placed after fsEntry so