• Run, debug, and watch Vitest tests in Visual Studio Code.
• NX support (see the NX sample).
• A @open tag can be used when filtering tests, to only show the tests open in the editor.

• Visual Studio Code version >= July 2021 (version 1.59).
• Vitest version >= v0.12.0

• vitest.enable: Extension will automatically detect if the current project is using Vitest. If detection fails, extension can be manually enabled via this option.
• vitest.watchOnStartup: Whether to activate Watch mode by default when the extension starts.
• vitest.nodeEnv: Environment passed to the runner process in addition to process.env
• vitest.commandLine: Command to execute Vitest tests. It should have the ability to append extra arguments. For example npx vitest or yarn test --. This is a workspace setting. Do not change it in the user settings, since it will affect all the projects you open)
• vitest.debugExclude: Excludes files matching specified glob patterns from debugging. Default: [\"<node_internals>/**\", \"**/node_modules/**\"]

See https://vitest.dev/guide/workspace.html for monorepo support.

You can use VS Code command add folder to workspace to add the sub directory. The extension should work fine.