• VSCode Version: 1.21.0
• OS Version: Windows 10

Does this issue occur when all extensions are disabled?: Yes

We hope that the vscode debug adapter protocol can include the setExpression request that is described here

The main purpose of this request is to allow modifying a "watch" expression. Even though VS Code does not support modifying a watch expression today. Many other debugger clients who implement VS Code debug protocol involve business of modifying a watch expression. Eg. Visual Studio who can debug Node, Chrome and Edge using VS Code debug protocol.