diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59815de6fc..ef6a8716b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -48,6 +48,8 @@ WeChat original voice can be prepared for playback, native quotes and retained l
 
 ### Fixed
 
+- **Bind app** no longer hides apps the IM plugin can't serve yet. A Discord app whose plugin lacks checked sending now shows greyed out with **update the IM plugin to bind this app**, instead of silently missing from the list ([#1123](https://github.com/BotHarness/BotHarness/issues/1123)).
+
 - Shared Channel messages now show the external sender’s retained name, including existing Discord history; bubbles render retained native @ names as chips using the Lark Inbox renderer, while original text and IDs stay intact and unavailable names keep the literal fallback ([#1061](https://github.com/BotHarness/BotHarness/issues/1061)).
 
 ### Documentation
diff --git a/CHANGELOG.zh.md b/CHANGELOG.zh.md
index 6fec2a1121..774892942d 100644
--- a/CHANGELOG.zh.md
+++ b/CHANGELOG.zh.md
@@ -48,6 +48,8 @@
 
 ### Fixed
 
+- **绑定应用** 不再隐藏 IM 插件暂时不支持的应用。插件缺少受检发送能力的 Discord 应用现在会置灰显示，并注明 **需要更新 IM 插件后才能绑定**，不会再悄悄从列表里消失（[#1123](https://github.com/BotHarness/BotHarness/issues/1123)）。
+
 - 共享频道消息现在显示已保存的外部发送人名称，已有 Discord 历史也会更新显示；气泡复用 Lark 收件箱的渲染方式，将已保存名称的原生 @ 提及显示为标签；原文和 ID 保持不变，未知名称保留原始文本（[#1061](https://github.com/BotHarness/BotHarness/issues/1061)）。
 
 ### Documentation
diff --git a/docs/assets/pr/1123-unsupported-apps/README.md b/docs/assets/pr/1123-unsupported-apps/README.md
new file mode 100644
index 0000000000..b3c512f366
--- /dev/null
+++ b/docs/assets/pr/1123-unsupported-apps/README.md
@@ -0,0 +1,8 @@
+# #1123 Unsupported apps stay visible in Bind app
+
+Captured from a real DSH Host (0.2.0-rc.1) with a simulated provider. "旧版插件应用" is a simulated app whose IM plugin lacks `proactive-text-checked`, the same state as Discord apps on the pinned dsh-im. Bind app is opened from Bob.
+
+|     | Light                   | Dark                   |
+| --- | ----------------------- | ---------------------- |
+| zh  | ![](bind-zh-light.webp) | ![](bind-zh-dark.webp) |
+| en  | ![](bind-en-light.webp) | ![](bind-en-dark.webp) |
diff --git a/docs/assets/pr/1123-unsupported-apps/bind-en-dark.webp b/docs/assets/pr/1123-unsupported-apps/bind-en-dark.webp
new file mode 100644
index 0000000000..8e72bbe056
Binary files /dev/null and b/docs/assets/pr/1123-unsupported-apps/bind-en-dark.webp differ
diff --git a/docs/assets/pr/1123-unsupported-apps/bind-en-light.webp b/docs/assets/pr/1123-unsupported-apps/bind-en-light.webp
new file mode 100644
index 0000000000..691ac48f99
Binary files /dev/null and b/docs/assets/pr/1123-unsupported-apps/bind-en-light.webp differ
diff --git a/docs/assets/pr/1123-unsupported-apps/bind-zh-dark.webp b/docs/assets/pr/1123-unsupported-apps/bind-zh-dark.webp
new file mode 100644
index 0000000000..e4248f9cdd
Binary files /dev/null and b/docs/assets/pr/1123-unsupported-apps/bind-zh-dark.webp differ
diff --git a/docs/assets/pr/1123-unsupported-apps/bind-zh-light.webp b/docs/assets/pr/1123-unsupported-apps/bind-zh-light.webp
new file mode 100644
index 0000000000..8f79d76b6d
Binary files /dev/null and b/docs/assets/pr/1123-unsupported-apps/bind-zh-light.webp differ
diff --git a/packages/client/src/client/external-identity-list.tsx b/packages/client/src/client/external-identity-list.tsx
index 5936430b47..554fb788af 100644
--- a/packages/client/src/client/external-identity-list.tsx
+++ b/packages/client/src/client/external-identity-list.tsx
@@ -280,16 +280,17 @@ export function ExternalIdentityList({
                   options={[...accounts]
                     .sort(
                       (a, b) =>
-                        Number(a.boundBotSlug !== undefined || !a.connected) -
-                          Number(b.boundBotSlug !== undefined || !b.connected) ||
+                        Number(a.boundBotSlug !== undefined || !a.connected || !!a.unsupported) -
+                          Number(b.boundBotSlug !== undefined || !b.connected || !!b.unsupported) ||
                         platform(a.platform).localeCompare(platform(b.platform)) ||
                         a.name.localeCompare(b.name),
                     )
                     .map((account) => ({
                       value: account.providerId + ':' + account.ref,
                       label: account.name,
-                      hint:
-                        account.boundBotSlug === undefined
+                      hint: account.unsupported
+                        ? t('identity.appUnsupported', { platform: platform(account.platform) })
+                        : account.boundBotSlug === undefined
                           ? account.connected
                             ? platform(account.platform)
                             : t('identity.appOffline', { platform: platform(account.platform) })
@@ -303,7 +304,10 @@ export function ExternalIdentityList({
                                 platform: platform(account.platform),
                                 name: botName(account.boundBotSlug),
                               }),
-                      disabled: !account.connected || account.boundBotSlug !== undefined,
+                      disabled:
+                        !account.connected ||
+                        account.boundBotSlug !== undefined ||
+                        !!account.unsupported,
                     }))}
                 />
               </label>
diff --git a/packages/client/src/client/locale.ts b/packages/client/src/client/locale.ts
index de0c68e343..728b869109 100644
--- a/packages/client/src/client/locale.ts
+++ b/packages/client/src/client/locale.ts
@@ -814,6 +814,7 @@ export const zh = {
   'identity.appUsedBy': '{platform} · 已被 {name} 使用',
   'identity.appThisBot': '{platform} · 已绑定到这个 Bot',
   'identity.appOffline': '{platform} · 未连接',
+  'identity.appUnsupported': '{platform} · 需要更新 IM 插件后才能绑定',
   'identity.manageApps': '管理应用凭据',
   'identity.newConversations': '新会话',
   'identity.newConversations.auto': '自动接收',
@@ -2961,6 +2962,7 @@ My relationship with the Human, established lore and topics to avoid: [fill in].
   'identity.appUsedBy': '{platform} · used by {name}',
   'identity.appThisBot': '{platform} · already bound to this Bot',
   'identity.appOffline': '{platform} · not connected',
+  'identity.appUnsupported': '{platform} · update the IM plugin to bind this app',
   'identity.manageApps': 'Manage app credentials',
   'identity.newConversations': 'New conversations',
   'identity.newConversations.auto': 'Admit automatically',
diff --git a/packages/client/test/external-identity-list.test.ts b/packages/client/test/external-identity-list.test.ts
index 244e7df611..bd45630c2c 100644
--- a/packages/client/test/external-identity-list.test.ts
+++ b/packages/client/test/external-identity-list.test.ts
@@ -252,7 +252,7 @@ it('Bind app shows real readiness after the commit and the app row lists its con
   }
 });
 
-it('Bind app lists every app, disables the ones a Bot uses with its owner, and offers a second app of a bound platform', async () => {
+it('Bind app lists every app, disables the ones a Bot uses with its owner or the Provider cannot serve, and offers a second app of a bound platform', async () => {
   Object.assign(globalThis, { IS_REACT_ACT_ENVIRONMENT: true });
   const app = (ref: string, boundBotSlug?: string) => ({
     providerId: 'dsh-im/feishu',
@@ -264,7 +264,12 @@ it('Bind app lists every app, disables the ones a Bot uses with its owner, and o
     ...(boundBotSlug ? { boundBotSlug } : {}),
   });
   const snapshot: MessagingSnapshot = {
-    accounts: [app('mine', 'ada'), app('theirs', 'bea'), app('free')],
+    accounts: [
+      app('mine', 'ada'),
+      app('theirs', 'bea'),
+      { ...app('old'), unsupported: 'checked-send' as const },
+      app('free'),
+    ],
     identities: [
       {
         id: 'binding',
@@ -311,6 +316,7 @@ it('Bind app lists every app, disables the ones a Bot uses with its owner, and o
     expect(options.map((o) => [o.dataset.value, o.disabled, o.textContent])).toEqual([
       ['dsh-im/feishu:free', false, expect.stringContaining('App free')],
       ['dsh-im/feishu:mine', true, expect.stringContaining('已绑定到这个 Bot')],
+      ['dsh-im/feishu:old', true, expect.stringContaining('需要更新 IM 插件')],
       ['dsh-im/feishu:theirs', true, expect.stringContaining('已被 Bea 使用')],
     ]);
   } finally {
diff --git a/packages/core/src/messaging/channel-media.ts b/packages/core/src/messaging/channel-media.ts
index a446d5d816..d52300af60 100644
--- a/packages/core/src/messaging/channel-media.ts
+++ b/packages/core/src/messaging/channel-media.ts
@@ -142,7 +142,9 @@ export function createChannelMediaAccess(options: {
       ? entry.provider.inspectAccount(value.accountRef)
       : entry.provider
           .accounts()
-          .then((accounts) => accounts.find((item) => item.ref === value.accountRef));
+          .then((accounts) =>
+            accounts.find((item) => item.ref === value.accountRef && !item.unsupported),
+          );
     const account = await abortable(inspect, signal);
     validate();
     if (
diff --git a/packages/core/src/messaging/dsh-im.ts b/packages/core/src/messaging/dsh-im.ts
index 5bee521cb9..90d2ef7266 100644
--- a/packages/core/src/messaging/dsh-im.ts
+++ b/packages/core/src/messaging/dsh-im.ts
@@ -307,7 +307,7 @@ export function createDshImProvider(
   )
     return undefined;
   const host = service as DshImOutboundService;
-  const account = async (ref: string) => {
+  const describe = async (ref: string) => {
     let info;
     try {
       info = await host.describeBot(ref);
@@ -322,8 +322,7 @@ export function createDshImProvider(
       info.version !== 1 ||
       info.botId !== ref ||
       info.channel !== platform ||
-      !/^[a-f0-9]{64}$/.test(info.account?.fingerprint ?? '') ||
-      !info.capabilities.includes('proactive-text-checked')
+      !/^[a-f0-9]{64}$/.test(info.account?.fingerprint ?? '')
     )
       throw new MessagingError('provider-incompatible');
     return {
@@ -332,8 +331,16 @@ export function createDshImProvider(
       name: info.account.name ?? ref,
       fingerprint: info.account.fingerprint,
       connected: info.connected,
+      ...(info.capabilities.includes('proactive-text-checked')
+        ? {}
+        : { unsupported: 'checked-send' as const }),
     };
   };
+  const account = async (ref: string) => {
+    const value = await describe(ref);
+    if (value.unsupported) throw new MessagingError('provider-incompatible');
+    return value;
+  };
   const targets = async (ref: string) =>
     (await host.listTargets(ref)).map((target) => ({
       ref: target.targetId,
@@ -373,7 +380,7 @@ export function createDshImProvider(
     id: `dsh-im/${platform}`,
     async accounts() {
       const bots = (await host.listBots()).filter((bot) => bot.channel === platform);
-      const result = await Promise.allSettled(bots.map((bot) => account(bot.botId)));
+      const result = await Promise.allSettled(bots.map((bot) => describe(bot.botId)));
       return result.flatMap((item) => (item.status === 'fulfilled' ? [item.value] : []));
     },
     targets,
diff --git a/packages/core/src/messaging/outbound.ts b/packages/core/src/messaging/outbound.ts
index e8c539f3bc..f8e044c28e 100644
--- a/packages/core/src/messaging/outbound.ts
+++ b/packages/core/src/messaging/outbound.ts
@@ -379,7 +379,9 @@ export function createOutboundMessaging(options: {
     const account = await bounded(
       entry.provider.inspectAccount
         ? entry.provider.inspectAccount(value.accountRef)
-        : entry.provider.accounts().then((rows) => rows.find((r) => r.ref === value.accountRef)),
+        : entry.provider
+            .accounts()
+            .then((rows) => rows.find((r) => r.ref === value.accountRef && !r.unsupported)),
     );
     current(value.providerId, entry.token);
     if (!account || account.ref !== value.accountRef || account.fingerprint !== value.fingerprint)
diff --git a/packages/core/src/messaging/provider.ts b/packages/core/src/messaging/provider.ts
index 6e6207b2ff..0b0e6c84a8 100644
--- a/packages/core/src/messaging/provider.ts
+++ b/packages/core/src/messaging/provider.ts
@@ -4,6 +4,7 @@ export interface MessagingAccount {
   name: string;
   fingerprint: string;
   connected: boolean;
+  unsupported?: 'checked-send';
 }
 
 export interface MessagingTarget {
diff --git a/packages/core/test/dsh-im-unsupported.test.ts b/packages/core/test/dsh-im-unsupported.test.ts
new file mode 100644
index 0000000000..698c53372a
--- /dev/null
+++ b/packages/core/test/dsh-im-unsupported.test.ts
@@ -0,0 +1,32 @@
+import { expect, it } from 'vitest';
+import { createDshImProvider, type DshImOutboundService } from '../src/messaging/dsh-im.js';
+
+it('lists a Discord app without checked send as unsupported and refuses to inspect it for binding', async () => {
+  const capabilities = { old: [] as string[], ready: ['proactive-text-checked'] };
+  const service = {
+    contractVersion: 1,
+    listBots: async () => [
+      { botId: 'old', channel: 'discord' },
+      { botId: 'ready', channel: 'discord' },
+    ],
+    describeBot: async (botId: 'old' | 'ready') => ({
+      version: 1,
+      botId,
+      channel: 'discord',
+      connected: true,
+      capabilities: capabilities[botId],
+      account: { name: botId, fingerprint: (botId === 'old' ? 'a' : 'b').repeat(64) },
+    }),
+    listTargets: async () => [],
+    sendChecked: async () => ({ ok: true }),
+  } as unknown as DshImOutboundService;
+  const provider = createDshImProvider(service, 'discord')!;
+  expect(await provider.accounts()).toEqual([
+    expect.objectContaining({ ref: 'old', unsupported: 'checked-send' }),
+    expect.not.objectContaining({ unsupported: expect.anything() }),
+  ]);
+  await expect(provider.inspectAccount!('old')).rejects.toMatchObject({
+    code: 'provider-incompatible',
+  });
+  await expect(provider.inspectAccount!('ready')).resolves.toMatchObject({ ref: 'ready' });
+});