I\'m using Assetic with the compass filter to pass and compile .scss files. This part of the setup seems to work fine. However, my understanding was that in the app_dev environm
Asset compilation is not part of the caching system. You need to re-install assets when you make changes, regardless of the environment.
app/console assets:install web
If the filesystem you're on supports symbolic links, you can avoid having to run this command for every change and instead just install the assets as such
app/console assets:install web --symlink
But since you're using Sass, this probably isn't an option for you.
HTH