@@ -0,0 +1,22 @@
+---
+'@objectstack/service-messaging': patch
+---
+
+fix(service-messaging): Setup's Notification Preferences form says which topics and channels can be entered
+
+Clause-②: no
+Metadata-protocol: none
+
+The Topic and Channel boxes on a notification preference only said "Notification topic" and "Channel id (inbox/email/push/…)", so an administrator had to know the machine names. One of the channels it named, `push`, does not exist. Both fields stay free text, because neither has a fixed list to pick from:
+
+- **Topics.** A topic is whatever name the sender uses, and nothing registers topics. A flow's notify step names its own topic, and platform features send fixed ones such as `approval.requested`.
+- **Channels.** Channels are registered while the server runs, and any plugin can add one. A dropdown would accept only the values in its list, and it cannot store the `*` wildcard that means "all channels".
+
+The help now names the values:
+
+- **Channel:** `inbox` (always available), `email` (once an email service is configured), `sms` (once an SMS service is configured), or the id of a channel an installed plugin adds.
+- **Topic:** where topics come from, with examples.
+
+Both helps also say `*` means all, and that a value nothing uses matches nothing.
+
+No stored row, accepted value, default or column changes. The translation bundles carry the new help.
@@ -0,0 +1,73 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * `sys_notification_preference.topic` and `.channel` stay free text, and their
+ * help says what to type (#25346, ruling A 2026-10-23).
+ *
+ * Setup → Notification Preferences offered two bare text boxes, so muting a
+ * topic meant knowing its machine name. Neither set can be a picker: topics
+ * are whatever string a sender writes (nothing registers them), and channels
+ * are registered at runtime through an open seam while a `select` is closed on
+ * the write path and cannot spell the stored `'*'` wildcard. The help carries
+ * the vocabulary instead, and these pins keep it honest:
+ *
+ *  - both fields stay `text` with the `'*'` default the resolver reads as
+ *    "all", so no stored row or write changes meaning;
+ *  - the channel help names exactly the ids of the channels this package
+ *    builds, read from the channel factories themselves, so a channel added
+ *    or renamed here fails this file until the help says so (the old help
+ *    named a `push` channel that never existed);
+ *  - the topic help names where topics come from and the wildcard.
+ */
+
+import { describe, expect, it } from 'vitest';
+import { NotificationPreference } from './notification-preference.object.js';
+import { createInboxChannel } from '../inbox-channel.js';
+import { createEmailChannel } from '../email-channel.js';
+import { createSmsChannel } from '../sms-channel.js';
+import { NotificationTemplateStore } from '../template-renderer.js';
+
+const fields = NotificationPreference.fields as Record<string, { type?: string; defaultValue?: unknown; description?: string }>;
+
+/** The ids of the channels `MessagingServicePlugin` registers, read off the factories. */
+function builtInChannelIds(): string[] {
+    const getData = () => undefined;
+    const store = new NotificationTemplateStore({ getData });
+    return [
+        createInboxChannel({ getData }).id,
+        createEmailChannel({ getEmail: () => undefined, getData, store }).id,
+        createSmsChannel({ getSms: () => undefined, getData, store }).id,
+    ];
+}
+
+/** Lowercase words of a help text that read as a channel id (`inbox`, `email`, …). */
+function channelIdsNamedIn(help: string, candidates: readonly string[]): string[] {
+    return candidates.filter((id) => new RegExp(`(^|[^a-z_])${id}([^a-z_]|$)`).test(help));
+}
+
+describe('sys_notification_preference topic / channel help (#25346)', () => {
+    it('both stay free text defaulting to the * wildcard', () => {
+        for (const name of ['topic', 'channel']) {
+            expect(fields[name]?.type, name).toBe('text');
+            expect(fields[name]?.defaultValue, name).toBe('*');
+            expect(fields[name]?.description, name).toMatch(/Enter \* for all /);
+        }
+    });
+
+    it('the channel help names every channel this package builds, and no channel it does not', () => {
+        const help = fields.channel?.description ?? '';
+        const ids = builtInChannelIds();
+        expect(ids).toEqual(['inbox', 'email', 'sms']);
+        expect(channelIdsNamedIn(help, ids)).toEqual(ids);
+        // Ids the spec's channel vocabulary carries that no channel here implements.
+        expect(channelIdsNamedIn(help, ['push', 'webhook', 'slack', 'teams', 'in-app'])).toEqual([]);
+        // The seam is open: a plugin's own channel id is a valid value too.
+        expect(help).toMatch(/a channel an installed plugin adds/);
+    });
+
+    it('the topic help says where a topic comes from', () => {
+        const help = fields.topic?.description ?? '';
+        expect(help).toMatch(/notify step/);
+        expect(help).toMatch(/approval\.requested/);
+    });
+});
@@ -133,7 +133,16 @@ export const NotificationPreference = ObjectSchema.create({
             // stored topic could never match an event the platform can store.
             // '*' is 1 char.
             maxLength: 200,
-            description: "Notification topic, or '*' for all topics.",
+            // [#25346, ruling A 2026-10-23] Free text, not a picker: no list of
+            // topics exists to pick from. A topic is whatever string the sender
+            // writes — a flow's notify step names its own, and platform features
+            // send fixed ones (`approval.*` in plugin-approvals, `collab.mention`
+            // in plugin-audit, …) — and nothing registers them. So the help says
+            // where a topic comes from instead. `notification-preference-
+            // topic-channel-help.test.ts` pins both helps.
+            description:
+                'The topic the notifications are sent under: the topic a flow\'s notify step names, or one the platform sends, ' +
+                'such as approval.requested or collab.mention. Enter * for all topics. A topic nothing sends matches nothing.',
         }),
 
         channel: Field.text({
@@ -147,7 +156,17 @@ export const NotificationPreference = ObjectSchema.create({
             // precedent (sys_session.revoke_reason, maxLength: 64). '*' is
             // 1 char.
             maxLength: 64,
-            description: "Channel id (inbox/email/push/…), or '*' for all channels.",
+            // [#25346, ruling A 2026-10-23] Free text, not a picker. The channels
+            // are known only at runtime, and the seam is open (any plugin may
+            // `registerChannel` its own id), while a `select` is closed on the
+            // write path and its option values are machine identifiers, which
+            // cannot spell the stored '*' wildcard. So the help names the ids
+            // this package registers instead; the pin holds that list equal to
+            // the `id`s of the three channels it builds (no `push` exists).
+            description:
+                'The channel: inbox (notifications shown inside the app, always available), email (once an email service is configured), ' +
+                'sms (once an SMS service is configured), or the id of a channel an installed plugin adds. ' +
+                'Enter * for all channels. An id no channel uses matches nothing.',
         }),
 
         enabled: Field.boolean({
 
@@ -210,11 +210,11 @@ export const enObjects: NonNullable<TranslationData['objects']> = {
       },
       topic: {
         label: "Topic",
-        help: "Notification topic, or '*' for all topics."
+        help: "The topic the notifications are sent under: the topic a flow's notify step names, or one the platform sends, such as approval.requested or collab.mention. Enter * for all topics. A topic nothing sends matches nothing."
       },
       channel: {
         label: "Channel",
-        help: "Channel id (inbox/email/push/…), or '*' for all channels."
+        help: "The channel: inbox (notifications shown inside the app, always available), email (once an email service is configured), sms (once an SMS service is configured), or the id of a channel an installed plugin adds. Enter * for all channels. An id no channel uses matches nothing."
       },
       enabled: {
         label: "Enabled",
 
@@ -210,11 +210,11 @@ export const esESObjects: NonNullable<TranslationData['objects']> = {
       },
       topic: {
         label: "Topic",
-        help: "Notification topic, or '*' for all topics."
+        help: "El tema con el que se envían las notificaciones: el tema que indica el paso de notificación de un flujo, o uno que envía la plataforma, como approval.requested o collab.mention. Escriba * para todos los temas. Un tema que nadie envía no coincide con nada."
       },
       channel: {
         label: "Channel",
-        help: "Channel id (inbox/email/push/…), or '*' for all channels."
+        help: "El canal: inbox (notificaciones dentro de la aplicación, siempre disponible), email (una vez configurado un servicio de correo electrónico), sms (una vez configurado un servicio de SMS) o el id de un canal que añada un plugin instalado. Escriba * para todos los canales. Un id que ningún canal usa no coincide con nada."
       },
       enabled: {
         label: "Enabled",
 
@@ -95,7 +95,6 @@ export const esESGeneratedSourceHashes: Readonly<Record<string, string>> = {
   "objects.sys_notification_delivery.label": "dab3eb6594ba3014",
   "objects.sys_notification_delivery.pluralLabel": "654247db5abbd7d2",
   "objects.sys_notification_preference.description": "48556455d3292290",
-  "objects.sys_notification_preference.fields.channel.help": "8c06b7c3f1a65fd7",
   "objects.sys_notification_preference.fields.channel.label": "979883fe73ee88cb",
   "objects.sys_notification_preference.fields.created_at.label": "1f02d416befb595b",
   "objects.sys_notification_preference.fields.digest.label": "76e9b35f27134f0b",
@@ -107,7 +106,6 @@ export const esESGeneratedSourceHashes: Readonly<Record<string, string>> = {
   "objects.sys_notification_preference.fields.enabled.label": "41fb04f20e64dc4f",
   "objects.sys_notification_preference.fields.id.label": "429cdf8675ce2833",
   "objects.sys_notification_preference.fields.quiet_hours.label": "fab43f24806d8f6f",
-  "objects.sys_notification_preference.fields.topic.help": "cf04f6b5ad2a5a33",
   "objects.sys_notification_preference.fields.topic.label": "819afdb3853e9d80",
   "objects.sys_notification_preference.fields.updated_at.label": "aba63dc2a9c79b8d",
   "objects.sys_notification_preference.fields.user_id.label": "6c0d22a931e235bd",
 
@@ -210,11 +210,11 @@ export const jaJPObjects: NonNullable<TranslationData['objects']> = {
       },
       topic: {
         label: "Topic",
-        help: "Notification topic, or '*' for all topics."
+        help: "通知の送信に使われるトピック:フローの通知ステップが指定するトピック、またはプラットフォームが送信するトピック(例: approval.requested、collab.mention)。すべてのトピックを対象にするには * を入力します。どこからも送信されないトピックは何にも一致しません。"
       },
       channel: {
         label: "Channel",
-        help: "Channel id (inbox/email/push/…), or '*' for all channels."
+        help: "チャネル:inbox(アプリ内の通知、常に利用可能)、email(メールサービスの設定後)、sms(SMS サービスの設定後)、またはインストール済みプラグインが追加したチャネルの ID。すべてのチャネルを対象にするには * を入力します。どのチャネルも使用しない ID は何にも一致しません。"
       },
       enabled: {
         label: "Enabled",
 
@@ -94,7 +94,6 @@ export const jaJPGeneratedSourceHashes: Readonly<Record<string, string>> = {
   "objects.sys_notification_delivery.label": "dab3eb6594ba3014",
   "objects.sys_notification_delivery.pluralLabel": "654247db5abbd7d2",
   "objects.sys_notification_preference.description": "48556455d3292290",
-  "objects.sys_notification_preference.fields.channel.help": "8c06b7c3f1a65fd7",
   "objects.sys_notification_preference.fields.channel.label": "979883fe73ee88cb",
   "objects.sys_notification_preference.fields.created_at.label": "1f02d416befb595b",
   "objects.sys_notification_preference.fields.digest.label": "76e9b35f27134f0b",
@@ -106,7 +105,6 @@ export const jaJPGeneratedSourceHashes: Readonly<Record<string, string>> = {
   "objects.sys_notification_preference.fields.enabled.label": "41fb04f20e64dc4f",
   "objects.sys_notification_preference.fields.id.label": "429cdf8675ce2833",
   "objects.sys_notification_preference.fields.quiet_hours.label": "fab43f24806d8f6f",
-  "objects.sys_notification_preference.fields.topic.help": "cf04f6b5ad2a5a33",
   "objects.sys_notification_preference.fields.topic.label": "819afdb3853e9d80",
   "objects.sys_notification_preference.fields.updated_at.label": "aba63dc2a9c79b8d",
   "objects.sys_notification_preference.fields.user_id.label": "6c0d22a931e235bd",
 
@@ -210,11 +210,11 @@ export const zhCNObjects: NonNullable<TranslationData['objects']> = {
       },
       topic: {
         label: "主题",
-        help: "通知主题,'*' 表示所有主题。"
+        help: "通知发送时使用的主题:流程中通知步骤指定的主题,或平台功能发出的主题,例如 approval.requested、collab.mention。填 * 表示所有主题。没有任何发送方使用的主题不会匹配任何通知。"
       },
       channel: {
         label: "通道",
-        help: "通道 ID(inbox/email/push/…),'*' 表示所有通道。"
+        help: "通道:inbox(站内收件箱,始终可用)、email(配置邮件服务后可用)、sms(配置短信服务后可用),或已安装插件添加的通道 ID。填 * 表示所有通道。没有任何通道使用的 ID 不会匹配任何通知。"
       },
       enabled: {
         label: "启用",