diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index 21cf0f0f01..58e9bbc92c 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -1679,6 +1679,7 @@ export type Endpoints = Overwrite<Endpoints_2, {
     'signin-flow': {
         req: SigninFlowRequest;
         res: SigninFlowResponse;
+        errors: SigninFlowErrors;
     };
     'signin-with-passkey': {
         req: SigninWithPasskeyRequest;
@@ -1695,12 +1696,14 @@ export type Endpoints = Overwrite<Endpoints_2, {
                 $default: SigninWithPasskeyInitResponse;
             };
         };
+        errors: SigninWithPasskeyErrors;
     };
     'admin/roles/create': {
         req: Overwrite<AdminRolesCreateRequest, {
             policies: PartialRolePolicyOverride;
         }>;
         res: AdminRolesCreateResponse;
+        errors: AdminRolesCreateErrors;
     };
 }>;
 
@@ -1732,10 +1735,11 @@ declare namespace entities {
         SignupErrors,
         SigninFlowRequest,
         SigninFlowResponse,
-        SigninErrors,
+        SigninFlowErrors,
         SigninWithPasskeyRequest,
         SigninWithPasskeyInitResponse,
         SigninWithPasskeyResponse,
+        SigninWithPasskeyErrors,
         PartialRolePolicyOverride,
         EmptyRequest,
         EmptyResponse,
@@ -3515,7 +3519,7 @@ type IRevokeTokenErrors = EndpointsErrors['i___revoke-token'][keyof EndpointsErr
 type IRevokeTokenRequest = operations['i___revoke-token']['requestBody']['content']['application/json'];
 
 // @public (undocumented)
-function isAPIError(reason: any): reason is Error & Record<typeof MK_API_ERROR, unknown>;
+function isAPIError(reason: Record<PropertyKey, unknown>): reason is APIError;
 
 // @public (undocumented)
 type ISigninHistoryErrors = EndpointsErrors['i___signin-history'][keyof EndpointsErrors['i___signin-history']];
@@ -4484,8 +4488,10 @@ type ServerStatsLog = ServerStats[];
 // @public (undocumented)
 type Signin = components['schemas']['Signin'];
 
+// Warning: (ae-forgotten-export) The symbol "WebAuthnServiceErrors" needs to be exported by the entry point index.d.ts
+//
 // @public (undocumented)
-type SigninErrors = {
+type SigninFlowErrors = {
     message: 'Too many failed attempts to sign in. Try again later.';
     code: 'TOO_MANY_AUTHENTICATION_FAILURES';
     id: '22d05606-fbcf-421a-a2db-b32610dcfd1b';
@@ -4501,7 +4507,7 @@ type SigninErrors = {
     id: 'cdf1235b-ac71-46d4-a3a6-84ccce48df6f';
 } | {
     id: '93b86c4b-72f9-40eb-9815-798928603d1e';
-};
+} | WebAuthnServiceErrors;
 
 // @public (undocumented)
 type SigninFlowRequest = {
@@ -4529,6 +4535,25 @@ type SigninFlowResponse = {
     authRequest: PublicKeyCredentialRequestOptionsJSON;
 };
 
+// @public (undocumented)
+type SigninWithPasskeyErrors = {
+    message: 'Too many failed attempts to sign in. Try again later.';
+    code: 'TOO_MANY_AUTHENTICATION_FAILURES';
+    id: '22d05606-fbcf-421a-a2db-b32610dcfd1b';
+} | {
+    id: '4e30e80c-e338-45a0-8c8f-44455efa3b76';
+} | {
+    id: '1658cc2e-4495-461f-aee4-d403cdf073c1';
+} | {
+    id: '932c904e-9460-45b7-9ce6-7ed33be7eb2c';
+} | {
+    id: '652f899f-66d4-490e-993e-6606c8ec04c3';
+} | {
+    id: 'e03a5f46-d309-4865-9b69-56282d94e1eb';
+} | {
+    id: '2d84773e-f7b7-4d0b-8f72-bb69b584c912';
+} | WebAuthnServiceErrors;
+
 // @public (undocumented)
 type SigninWithPasskeyInitResponse = {
     option: PublicKeyCredentialRequestOptionsJSON;
diff --git a/packages/misskey-js/src/autogen/endpointErrors.ts b/packages/misskey-js/src/autogen/endpointErrors.ts
index efceb28d8f..cdf3137d53 100644
--- a/packages/misskey-js/src/autogen/endpointErrors.ts
+++ b/packages/misskey-js/src/autogen/endpointErrors.ts
@@ -1966,6 +1966,7 @@ export type EndpointsErrors = {
 		'URI_NULL': IdentifiableError['bf326f31-d430-4f97-9933-5d61e4d48a23'],
 		'FORBIDDEN_TO_SET_YOURSELF': IdentifiableError['25c90186-4ab0-49c8-9bba-a1fa6c202ba4'],
 		'RESTRICTED_BY_ROLE': IdentifiableError['8feff0ba-5ab5-585b-31f4-4df816663fad'],
+		'YOUR_NAME_CONTAINS_PROHIBITED_WORDS': IdentifiableError['0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191'],
 		'INVALID_PARAM': IdentifiableError['3d81ceae-475f-4600-b2a8-2bc116157532'],
 		'CREDENTIAL_REQUIRED': IdentifiableError['1384574d-a912-4b81-8601-c7b1c4085df1'],
 		'AUTHENTICATION_FAILED': IdentifiableError['b0a7f5f8-dc2f-4171-b91f-de88ad238e14'],
@@ -3285,6 +3286,7 @@ export type IdentifiableError = {
 	'bf326f31-d430-4f97-9933-5d61e4d48a23': {'message':'User ActivityPup URI is null.', 'code':'URI_NULL', 'id':'bf326f31-d430-4f97-9933-5d61e4d48a23', [x: string]: any },
 	'25c90186-4ab0-49c8-9bba-a1fa6c202ba4': {'message':'You can\'t set yourself as your own alias.', 'code':'FORBIDDEN_TO_SET_YOURSELF', 'id':'25c90186-4ab0-49c8-9bba-a1fa6c202ba4', [x: string]: any },
 	'8feff0ba-5ab5-585b-31f4-4df816663fad': {'message':'This feature is restricted by your role.', 'code':'RESTRICTED_BY_ROLE', 'id':'8feff0ba-5ab5-585b-31f4-4df816663fad', [x: string]: any },
+	'0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191': {'message':'Your new name contains prohibited words.', 'code':'YOUR_NAME_CONTAINS_PROHIBITED_WORDS', 'id':'0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191', 'httpStatusCode':422, [x: string]: any },
 	'b5c90186-4ab0-49c8-9bba-a1f766282ba4': {'message':'Destination account doesn\'t have proper \'Known As\' alias, or has already moved.', 'code':'DESTINATION_ACCOUNT_FORBIDS', 'id':'b5c90186-4ab0-49c8-9bba-a1f766282ba4', [x: string]: any },
 	'4362e8dc-731f-4ad8-a694-be2a88922a24': {'message':'The root can\'t migrate.', 'code':'NOT_ROOT_FORBIDDEN', 'id':'4362e8dc-731f-4ad8-a694-be2a88922a24', [x: string]: any },
 	'95ba11b9-90e8-43a5-ba16-7acc1ab32e71': {'message':'Local User ActivityPup URI is null.', 'code':'URI_NULL', 'id':'95ba11b9-90e8-43a5-ba16-7acc1ab32e71', [x: string]: any },