diff --git a/.changeset/org-role-vocabulary-closed.md b/.changeset/org-role-vocabulary-closed.md
new file mode 100644
index 000000000..325ea772e
--- /dev/null
+++ b/.changeset/org-role-vocabulary-closed.md
@@ -0,0 +1,33 @@
+---
+'@object-ui/auth': patch
+---
+
+docs(auth): the org-role vocabulary is closed — correct the mirror's standing instruction (framework ADR-0108)
+
+`org-roles.ts` carried a standing instruction that is now wrong: *"a role added
+server-side must be added HERE too."* There are no server-side additions left
+to chase.
+
+The framework used to register every declared `position` / `permission` name as
+an organization role, so the console's list could always fall behind the
+server's. That channel was retired (framework ADR-0108, objectstack#3723):
+every value stored in `sys_member.role` is projected into
+`current_user.positions`, so a business role handed out that way was capability
+with none of the position system's controls — no `granted_by`, no validity
+window, no scope check. `sys_member.role` is now a closed, framework-owned list
+of `owner` / `admin` / `delegated_admin` / `member`, and an app's own business
+roles are positions, granted through `sys_user_position` or an invitation's
+placement (framework ADR-0105 D8).
+
+So this mirror is now complete **by construction** rather than by vigilance.
+Nothing about the console's behaviour changes — the four names and their labels
+are what they already were.
+
+Still a mirror rather than a derivation, but only for a packaging reason now:
+the names live in `@objectstack/spec` as `BUILTIN_MEMBERSHIP_ROLES` /
+`BUILTIN_MEMBERSHIP_ROLE_OPTIONS`, which `@object-ui/auth` cannot import yet —
+this package takes no dependency on `@objectstack/spec`, and those constants
+ship in the first release carrying ADR-0108 (they are absent from the published
+16.1.0). A new test pins the list to exactly those four in display order until
+then, so drift fails loudly instead of silently offering a value the server's
+enforced `select` would reject.
diff --git a/packages/auth/src/__tests__/org-roles.test.ts b/packages/auth/src/__tests__/org-roles.test.ts
index 015e0a3a4..d5256b2c6 100644
--- a/packages/auth/src/__tests__/org-roles.test.ts
+++ b/packages/auth/src/__tests__/org-roles.test.ts
@@ -33,6 +33,22 @@ describe('vocabulary', () => {
     expect(ORG_ROLES).toContain(ORG_ROLE_DELEGATED_ADMIN);
   });
 
+  it('is EXACTLY the framework four — the closed vocabulary, mirrored', () => {
+    // [framework ADR-0108 / objectstack#3723] `sys_member.role` is a closed,
+    // framework-owned list; an app can no longer register a fifth name. This
+    // is the drift guard until `@object-ui/auth` can import
+    // `BUILTIN_MEMBERSHIP_ROLES` from `@objectstack/spec` (see org-roles.ts).
+    //
+    // Order matters: it is the display order both screens list, and it matches
+    // `BUILTIN_MEMBERSHIP_ROLE_OPTIONS` server-side.
+    //
+    // If this fails because the framework list changed, mirror the change —
+    // do NOT add a name the server does not offer. A value outside this set is
+    // rejected on write by an enforced `Field.select`, so the console would be
+    // offering something that always 400s.
+    expect([...ORG_ROLES]).toEqual(['owner', 'admin', 'delegated_admin', 'member']);
+  });
+
   it('every role has a label — a role with no label renders as a raw key', () => {
     for (const role of ORG_ROLES) {
       expect(ORG_ROLE_LABELS[role]?.key).toBeTruthy();
diff --git a/packages/auth/src/index.ts b/packages/auth/src/index.ts
index 5e35ffabb..1fbe18ef0 100644
--- a/packages/auth/src/index.ts
+++ b/packages/auth/src/index.ts
@@ -37,8 +37,9 @@ export { normalizePhoneIdentifier, looksLikePhoneIdentifier } from './phone-iden
 export { createAuthenticatedFetch, ActiveOrganizationStorage, type AuthenticatedAdapterOptions } from './createAuthenticatedFetch';
 export { getUserInitials } from './types';
 
-// Organization membership-role vocabulary + the narrowing helpers every org
-// screen shares (see `org-roles.ts` for why this mirrors rather than derives).
+// Organization membership-role vocabulary — a CLOSED, framework-owned list of
+// four (framework ADR-0108) — plus the narrowing helpers every org screen
+// shares. See `org-roles.ts` for why this still mirrors rather than derives.
 export {
   ORG_ROLE_OWNER,
   ORG_ROLE_ADMIN,
diff --git a/packages/auth/src/org-roles.ts b/packages/auth/src/org-roles.ts
index 0fa9ca3a5..d26dd1bc9 100644
--- a/packages/auth/src/org-roles.ts
+++ b/packages/auth/src/org-roles.ts
@@ -15,13 +15,32 @@
  * 'member'` in both `MembersPage` and `InviteMemberDialog`, so a role the
  * server had learned about was still unreachable from either screen.
  *
- * ⚠️ This list MIRRORS the server; it does not derive from it. `/auth/config`
- * exposes feature flags but no role vocabulary, so there is no surface to read
- * — see objectstack-ai/objectstack#3723, which tracks making one list the
- * source for all of them (the framework already carries the same list twice:
- * the better-auth roles map and two enforced `Field.select` option sets). Until
- * that lands, a role added server-side must be added HERE too — one place, not
- * two.
+ * ## The vocabulary is CLOSED — this mirror is complete by construction
+ *
+ * [framework ADR-0108 / objectstack#3723] These four names are the WHOLE list,
+ * and the framework owns them. An application cannot add a fifth: the server
+ * used to register every declared `position` / `permission` name as an
+ * organization role, and that was retired, because every value stored in
+ * `sys_member.role` is projected into `current_user.positions` — so a business
+ * role handed out this way was capability with none of the position system's
+ * controls (no `granted_by`, no validity window, no scope check).
+ *
+ * So the standing instruction that used to live here — *"a role added
+ * server-side must be added HERE too"* — no longer applies. There are no
+ * server-side additions to chase. A membership role is an organization GRADE
+ * (what you may reach); what a person may DO is a position, granted through
+ * `sys_user_position` or an invitation's placement (framework ADR-0105 D8).
+ *
+ * ⚠️ Still a mirror, not a derivation — but now only for a packaging reason,
+ * not a design one. The names live in `@objectstack/spec` as
+ * `BUILTIN_MEMBERSHIP_ROLES` / `BUILTIN_MEMBERSHIP_ROLE_OPTIONS`, which
+ * `@object-ui/auth` cannot import yet: this package does not depend on
+ * `@objectstack/spec`, and the constants ship in the first release carrying
+ * ADR-0108 (absent from the published 16.1.0). Once this package takes that
+ * dependency at a version that has them, the four `export const`s below become
+ * a re-export and `ORG_ROLES` becomes `[...BUILTIN_MEMBERSHIP_ROLES]` — the
+ * labels and grade ladder stay here, since they are console concerns.
+ * `orgRolesMatchFramework` in the tests pins the list until then.
  */
 
 export const ORG_ROLE_OWNER = 'owner';