Sub Agent not able to interact or see context window

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

In the current state of Cursor—and this has been the case for a long time, since it became possible to start sub-agents—there are two major limitations in the new tab where the sub-agent is launched:

  • First, there is no way to interact with it; there is no chat window where we can communicate with the sub-agent.
  • Second, we cannot see the context window. We do not know whether it is at 20% or 80%.

These two factors are, of course, incredibly limiting.

Steps to Reproduce

see desc

Operating System

Windows 10/11

Version Information

Version: 3.22.7 (user setup)
VS Code Extension API: 1.128.0
Commit: 37076c6c3f9e253c0fa2305197e45befd13a2260
Date: 2026-09-24T05:01:24.589Z
Layout: IDE
Build Type: Stable
Release Track: Default
Electron: 42.10.0
Chromium: 148.0.7778.280
Node.js: 24.18.1
V8: 14.8.178.38-electron.0
xterm.js: 6.1.0-beta.291
OS: Windows_NT x64 10.0.26200

Does this stop you from using Cursor

No - Cursor works, but with this issue

A post was merged into an existing topic: Feature Request: Show Subagent Context Window Size in the IDE