@@ -0,0 +1,15 @@
+---
+"@objectstack/spec": minor
+---
+
+feat(spec): register the invitation role cap's three refusal codes under `@objectstack/plugin-auth`
+
+Clause-②: yes (widening)
+
+The error-code ledger (`ERROR_CODE_LEDGER`, and so `ErrorCode`) gains three `@objectstack/plugin-auth` codes, one per refusal the invitation role cap can return. Today the cap answers all three as a bare `403 FORBIDDEN`, so a client such as the Invite User dialog cannot tell them apart:
+
+- `INVITE_ROLE_ABOVE_ISSUER` — the requested role grades above the issuer's own; an invitation never confers authority above its issuer.
+- `INVITE_ISSUER_MEMBER_ONLY` — an issuer below admin grade may invite only as a plain `member`; the requested role may carry capability of its own.
+- `INVITE_ISSUER_UNVERIFIED` — fail-closed: the issuer's organization membership could not be established, so the invitation may confer nothing beyond `member`.
+
+Registration only: `@objectstack/plugin-auth` still throws `FORBIDDEN` until #23945 stamps these codes on its refusals. No existing code changes, and no standard-catalog member is shadowed (none needs a synonym waiver).
@@ -28,7 +28,7 @@ const result = ApiErrorSchema.parse(data);
 
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
-| **code** | `Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| 'INVALID_FORMAT' \| 'VALUE_TOO_LONG' \| 'VALUE_TOO_SHORT' \| 'VALUE_OUT_OF_RANGE' \| … +332 more>` | ✅ | Error code (e.g. VALIDATION_ERROR; StandardErrorCode ∪ the ledger the serving side registers — ERROR_CODE_LEDGER for framework packages) |
+| **code** | `Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| 'INVALID_FORMAT' \| 'VALUE_TOO_LONG' \| 'VALUE_TOO_SHORT' \| 'VALUE_OUT_OF_RANGE' \| … +335 more>` | ✅ | Error code (e.g. VALIDATION_ERROR; StandardErrorCode ∪ the ledger the serving side registers — ERROR_CODE_LEDGER for framework packages) |
 | **declaredCode** | `string` | optional | The producer-declared code, verbatim, when it is not a member of the closed `code` vocabulary — the open, author-authored channel (app-specific spellings; ADR-0112) |
 | **message** | `string` | ✅ | Readable error message |
 | **userMessage** | `string` | optional | Producer-marked user-facing refusal text, verbatim. Present exactly when the producer opted in at throw time; consumers render it to end users and keep their generic substitution for anything unmarked. Status-agnostic; never replaces `message`. |
@@ -219,7 +219,10 @@ const result = ApiErrorSchema.parse(data);
 * `INVALID_SIGNATURE`
 * `INVALID_STATE`
 * `INVITE_EMAIL_FAILED`
+* `INVITE_ISSUER_MEMBER_ONLY`
+* `INVITE_ISSUER_UNVERIFIED`
 * `INVITE_REQUIRES_EMAIL`
+* `INVITE_ROLE_ABOVE_ISSUER`
 * `INVITE_SMS_FAILED`
 * `IP_NOT_ALLOWED`
 * `ITEM_LOCKED`
 
@@ -386,7 +386,10 @@ const result = ErrorCode.parse(data);
 * `INVALID_SIGNATURE`
 * `INVALID_STATE`
 * `INVITE_EMAIL_FAILED`
+* `INVITE_ISSUER_MEMBER_ONLY`
+* `INVITE_ISSUER_UNVERIFIED`
 * `INVITE_REQUIRES_EMAIL`
+* `INVITE_ROLE_ABOVE_ISSUER`
 * `INVITE_SMS_FAILED`
 * `IP_NOT_ALLOWED`
 * `ITEM_LOCKED`
 
@@ -231,6 +231,18 @@ describe('ErrorCode (standard ∪ registered)', () => {
     expect(standardSynonymOf('FLOW_INPUT_SCHEMA_INVALID')).toBeUndefined();
   });
 
+  it('accepts the invitation role cap refusal codes, registered ahead of their plugin-auth producer', () => {
+    // #24082 is the spec half of #23945's split: the cap's three refusals are
+    // a bare `FORBIDDEN` today, so a client cannot tell them apart. #23945
+    // stamps them and asserts these exact strings by value — pinned here too.
+    for (const code of ['INVITE_ROLE_ABOVE_ISSUER', 'INVITE_ISSUER_MEMBER_ONLY', 'INVITE_ISSUER_UNVERIFIED']) {
+      expect(ErrorCode.parse(code)).toBe(code);
+      expect(ERROR_CODE_LEDGER['@objectstack/plugin-auth'], `${code} registered under plugin-auth`).toContain(code);
+      // INVITE is a token no standard member carries — no waiver needed.
+      expect(standardSynonymOf(code), `${code} needs no waiver`).toBeUndefined();
+    }
+  });
+
   it('accepts the nine-code batch — every code that ships in dist, door or no door (ruled: the ledger is the published face)', () => {
     // The #16404 ruling (director seat, decision batch #62, 2026-09-07, option
     // D): the published face is this ledger, so a code that ships in `dist` is
 
@@ -570,7 +570,13 @@ export const ERROR_CODE_LEDGER = {
     'INVALID_EMAIL',
     'INVALID_PHONE',
     'INVITE_EMAIL_FAILED',
+    // [#24082] The invitation role cap's three refusals (`invitation-role-cap.ts`,
+    // thrown 403 from `beforeCreateInvitation`), registered AHEAD of their
+    // producer: today the cap throws a bare `FORBIDDEN`, and #23945 stamps these.
+    'INVITE_ISSUER_MEMBER_ONLY',  // [#24082] 403: an issuer below admin grade may invite only as a plain `member`; the requested role does not outrank theirs but may carry capability of its own
+    'INVITE_ISSUER_UNVERIFIED',   // [#24082] 403, fail-closed: the issuer's `sys_member` role could not be established (no row, or the lookup did not answer), so the invitation may confer nothing beyond `member`
     'INVITE_REQUIRES_EMAIL',
+    'INVITE_ROLE_ABOVE_ISSUER',   // [#24082] 403: the requested role grades above the issuer's own (an invitation never confers authority above its issuer)
     'INVALID_REQUEST',
     'INVITE_SMS_FAILED',
     'IP_NOT_ALLOWED',