Expose Remote Control connection status in the statusLine JSON payload

Feature request

Custom statusLine scripts (configured via settings.json → statusLine.command) receive a JSON payload on stdin, documented at statusline.md. The documented fields (model, workspace, context_window, rate_limits, pr, vim.mode, agent.name, etc.) do not include anything about Remote Control connection state.

Meanwhile, remote-control.md describes a native /rc active indicator that shows in the footer (or startup header, in fullscreen rendering) while a Remote Control connection is up — but this indicator is entirely separate from the custom statusline mechanism, and disappears from view once the conversation scrolls past the startup header (in fullscreen mode).

Problem: anyone running a custom statusline script has no way to reflect Remote Control's live connection status in it, since the data simply isn't passed to the script. The only options today are:

• a static/always-on hint in the custom statusline (misleading — doesn't reflect actual state), or
• rely on the native indicator, which is only reliably visible at session start in fullscreen mode.

Proposed fix: add a remote_control object to the statusline JSON payload, e.g.:

"remote_control": {
  "connected": true,
  "url": "https://claude.ai/code/..."
}

This would let custom statusline scripts render an accurate, persistent, live RC status indicator alongside git branch, context usage, etc. — consistent with how pr.number/pr.url already mirror the footer's PR badge.

Version: Claude Code 2.1.270