Need to provide a reasonable way to allow the user to keep track of launched processes

[kieferrm]

Version: 1.139.0-insider
Commit: 4fa9fcf
Date: 2026-09-17T15:56:52Z
Electron: 43.6.0
ElectronBuildId: 15274685
Chromium: 150.0.7871.250
Node.js: 24.20.0
V8: 15.0.245.31-electron.0
@github/copilot: 1.0.84-5
@github/copilot-sdk: 1.0.13
OS: Darwin arm64 25.6.0

1. use the copilot harness
2. ask the agent to start a server process (like in Browser use in the agents window on remote agent hosts not working #336681 to open a resource in a browser via a web server)

-> naturally the server keeps running after the session finishes; however in yolo mode and as a side effect of running scripts I might miss that a server was started

We should have support to track launched processes, for example we could list them in a drop down in the artifacts section of the agents window similar to what we do we subagents. Need also a solution for the editor window.

[anthonykim1]

I've been looking into ways to better keep track of background shells:

Few WIP relevant PRs, that would allow this to happen:

• Expose active background shells in chat state agent-host-protocol#475
• Add background work to chat state for shells and subagents agent-host-protocol#482

[anthonykim1]

Closed via: #338723
Now there is way to track both attached, detached background shells in both editor and agents window.