Reopening project sometimes requires "Import Project"

[wiredopposite]

Sometimes opening an existing pico-vscode project requires importing it again with the extension, otherwise the configure and build buttons are greyed out. This also adds a bunch of unnecessary lines to your CMakeLists file and downloads the sdk and toolchain files over again.

[will-v-pi]

This can occur if you don't have a set(PICO_BOARD ....) line in your CMakeLists.txt - is that the case here?

Could you also add your CMakeLists.txt file to this issue so we can see what else might be causing the problem