The code spell checker plugin, formerly cspell, works well for “normal” vscode project, but wasn’t doing anything for a workspace based project.

cSpell is a spelling plugin for VS Code. Not my favourite, but the only one I found. It isn’t particularly well documented though. It avoids spell checking files in .gitignore. To stop that, you need to add “cSpell.useGitignore”: false, to your settings