As mentioned, Claude Code is built to (at least in VSCode) automatically install it’s extension when you run it in the terminal. I can’t speak to the specifics of installing it on Windows in WSL, but this would be something to raise on the Claude Code side I believe.
I don’t know of any behaviours or changes we have that should stop this from working as intended, so I would assume Claude Code has just not been build to support Cursor inside WSL.
If any figures out what the cause is here and it does turn our to be Cursor, we’d be happy to resolve it!