Member of the team here, happy to answer questions. Took a lot of ups, downs and work to get here but excited to finally get this out. Even more excited to share other features we've been cooking behind the scenes. Give it a try and let us know what you think, we're hungry for feedback.
right now we're using docker -- we're planning to support modal (https://modal.com/) for remote sandboxes and a "local" mode that might use something like worktrees