diff --git a/UAT_PLAYBOOK.md b/UAT_PLAYBOOK.md
index 5db2f6b..c6e10f8 100644
--- a/UAT_PLAYBOOK.md
+++ b/UAT_PLAYBOOK.md
@@ -33,6 +33,11 @@ GroomBook API is a Hono-based REST service (TypeScript/Node.js) powering the pet
 | TC-API-1.8 | Email+password — invalid password | POST /api/auth/sign-in/email with wrong password | 400 Bad Request, error returned |
 | TC-API-1.9 | Email+password — unknown user | POST /api/auth/sign-in/email with non-existent email | 400 Bad Request, error returned |
 | TC-API-1.10 | Auto-provision on first OIDC login | First login as a Better-Auth user with no existing staff record | 200 OK, access granted; groomer staff record auto-created with name/email from user table |
+| TC-API-1.11 | Existing staff unaffected by OIDC login | Login as uat-groomer@groombook.dev (email+password), then GET /api/staff to find that record | 200 OK, staff record unchanged — no duplicate created, original role and isSuperUser preserved |
+| TC-API-1.12 | Auto-provisioned role and superUser flags | After TC-API-1.10, GET /api/staff and inspect the auto-created record | role = "groomer", isSuperUser = false, active = true |
+| TC-API-1.13 | Name fallback — user.name present | Auto-provision where Better-Auth user has name set | Staff name = user.name value from user table |
+| TC-API-1.14 | Name fallback — no name, email present | Auto-provision where Better-Auth user has name = null, email = "test@example.com" | Staff name = "test" (email prefix before @) |
+| TC-API-1.15 | Name fallback — no name, no email | Auto-provision where Better-Auth user has name = null, email = null | Staff name = "Unknown" |
 
 ### 4.2 Client Management