Mobile Agents sheet shows the OpenAI logo for a task delegated to another environment when the app is not connected to it

从 apps/mobile/src/features/threads/SubagentRow.tsx 开始：该行通过 useEnvironmentServerConfig(...) 解析 provider，并回退到 provider?.driver ?? subagent.driver，即 "remote" 占位符，来自 apps/server/src/peer/RemoteDelegation.ts。与 thread-subagent-group.tsx（SubagentAvatar）和 web 的 ThreadRelationshipsControl.tsx（fallbackIcon={BotIcon}）中已经使用的守卫进行比较，然后检查 apps/mobile/src/components/ProviderIcon.tsx，其中通用 fallback 渲染 OpenAI 结。完成后的样子是：委派给已断开环境的任务所在行显示中性的机器人字形，而不是 OpenAI 标志，对于到达通用 fallback 的 "remote" driver 也是如此。

What happened

On the iPad app, a thread on my MacBook delegated a task to my desktop environment with delegate_task, using Claude Opus 5.5. The iPad is connected to the MacBook but not to the desktop. In the thread's Agents sheet, that task's row shows the OpenAI/ChatGPT logo next to "Claude Opus 5.5". Local Claude tasks in the same sheet show the Claude logo correctly.

Reproduced with a placeholder task on Claude Haiku 5.5 delegated to the other environment: the row shows "Working on" followed by that environment's name and "Claude Haiku 5.5" with the OpenAI logo.

Diagnosis

The server records a cross-environment task with the placeholder driver "remote" (apps/server/src/peer/RemoteDelegation.ts: driver: ProviderDriverKind.make("remote"), commented "The driver runs there; this side only labels the task with it").

SubagentMetadata in apps/mobile/src/features/threads/SubagentRow.tsx looks up the provider instance in the remote environment's server config (useEnvironmentServerConfig(subagent.remoteChild?.environmentId ?? environmentId)). When the client is not connected to that environment, there is no config, so provider is undefined and the row falls back to <ProviderIcon provider={provider?.driver ?? subagent.driver} />, which means provider="remote".

ProviderIcon (apps/mobile/src/components/ProviderIcon.tsx) has no branch for "remote", and getProviderClient("remote") returns undefined, so it reaches the generic fallback at the end. That fallback is the OpenAI knot glyph (the same path as the OpenAI icon in apps/web/src/components/Icons.tsx). So any task whose driver cannot be resolved is drawn as an OpenAI task.

The other surfaces already handle this case:

• the mobile chat subagent card (thread-subagent-group.tsx, SubagentAvatar) skips item.driver when remoteChild is set ("A remote task's own driver is only a "remote" label") and shows a neutral robot symbol;
• web's lineage row (ThreadRelationshipsControl.tsx) does the same with fallbackIcon={BotIcon}.

Only the Agents sheet row passes the "remote" placeholder through. The code is unchanged on current main.

Possible fixes: apply the same remoteChild guard and robot fallback in SubagentRow; or, since launched.modelSelection is already stored, record or derive the real driver so the sheet can show the Claude logo even when it is offline. Separately, a generic fallback that is a real vendor's logo makes any unresolved driver look like Codex; a neutral glyph would be safer.

Steps to reproduce

1. Link two environments, A and B.
2. Connect the mobile app to A only.
3. In a thread on A, have the agent run delegate_task with a target in environment B and a Claude model.
4. On mobile, open the thread and tap the "Waiting on N subagents" pill to open the Agents sheet.
5. The delegated row shows "Working on" followed by B's name, the model name, and the OpenAI logo instead of the Claude logo.

From the code, connecting the mobile app to B as well should make the row show the correct icon and instance name, because the config lookup then succeeds. This has not been tested.

Version

Mobile 2.3.0 (iPadOS). Parent server: 0.1.10-nightly.20261115.4723 (macOS desktop app). Delegated environment's server: 0.1.10-nightly.20261112.4580 (Windows desktop app).

Environment

iPad mini, T3 Code 2.3.0 (App Store). Parent environment: macOS desktop app. Delegated environment: Windows desktop app, linked to the parent but not connected from the iPad.

Evidence

apps/server/src/peer/RemoteDelegation.ts
  driver: ProviderDriverKind.make("remote"),

apps/mobile/src/features/threads/SubagentRow.tsx
  const config = useEnvironmentServerConfig(subagent.remoteChild?.environmentId ?? environmentId);
  ...
  <ProviderIcon provider={provider?.driver ?? subagent.driver} ... />   // "remote" when config is missing

apps/mobile/src/components/ProviderIcon.tsx
  // last return: the OpenAI knot, used for any driver without an icon
  <Svg ... viewBox="100 100 411 411"> <Path d="M252.794 108.802 ..." />

Related issues

#26854 (iPhone listed cross-machine delegated tasks as top-level threads, fixed) and #24831/#24896 (account badges on subagent rows) touch the same rows but not the icon fallback. No existing issue found for this.

Fix applied or workaround

None. Connecting the mobile app to the delegated environment should work around it (from the code, untested).

Filed by

Claude Code (claude-opus-5-5) via T3 Code triage, main author.

Automated comment from a coding agent. Model: claude-opus-5-5