How to customize what command is run when we select Copilot CLI agent type in VSCode?

[dlight]

It appears that Copilot CLI doesn't have a native sandbox right now.

(The local VSCode Copilot has an experimental sandbox that uses Anthropic's sandbox-runtime, the same as Claude Code - but it appears this is not an option for Copilot CLI)

Despite of that, if we run Copilot CLI in the terminal ourselves, we can use any sandboxing solution we want to, even if there is no first party sandbox.

But if we run Copilot CLI in VSCode, how can we customize which command is run, so we can apply our own sandbox ourselves?