[BUG] Remote Control: AskUserQuestion shows 'awaiting input' on mobile but question and answer UI are completely missing

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When using Remote Control (/remote-control) via the Claude mobile app (phone), and the CLI instance invokes the AskUserQuestion tool, the mobile app only displays a status indicator showing that the session is "awaiting user input." However:

• The actual question text is not rendered at all — not truncated, completely absent
• There is no answer UI — no text input, no option buttons, no way to respond
• The session is effectively stuck: the CLI is waiting for a response that the mobile user has no way to provide

On the CLI side, AskUserQuestion renders a full TUI interface with the question and input/selection options. None of this is surfaced to the remote mobile client.

What Should Happen?

When AskUserQuestion is invoked, the Remote Control mobile client should render:

1. The full question text
2. The appropriate answer UI (text input field, multiple-choice options, etc.)
3. A submit mechanism to send the response back to the CLI session

This should mirror the functionality available in the terminal TUI, adapted for the mobile form factor.

Steps to Reproduce

1. Start a Claude Code CLI session on a local machine
2. Enable Remote Control (/remote-control)
3. Connect to the session from the Claude app on a phone
4. Trigger any workflow that causes Claude to invoke the AskUserQuestion tool (e.g., a skill that prompts the user for a choice, or an agent that needs user clarification)
5. Observe on mobile: The app shows the session is awaiting user input, but no question or answer interface is displayed
6. Observe on CLI: The TUI shows the full AskUserQuestion prompt, waiting for input

Claude Model

Opus

Is this a regression?

Not sure — Remote Control is a recent feature

Claude Code Version

Latest

Platform

Anthropic API (Max)

Operating System

• CLI host: macOS (Apple Silicon)
• Remote client: iOS Claude app (iPhone)

Terminal/Shell

zsh

Additional Information

Related but distinct issues:

• #28508 — AskUserQuestion selections made on mobile are not received by CLI (question is visible, response doesn't propagate). Different: in this issue the question is never shown at all.
• #28991 — AskUserQuestion text is truncated on iOS with no expand option (question is partially visible, answer options work). Different: in this issue the entire question/answer UI is absent, not just truncated.

This appears to be a more fundamental rendering issue where the AskUserQuestion tool call is not being translated into any mobile UI component — the mobile client only recognizes that the session is in a "waiting" state but does not render the interactive prompt.