Global installs run by name, and pnpm and yarn are ready
In a new sandbox, npm install -g failed without sudo, and with it, or with bun add -g, the command installed but was not found. Now all three put their commands on PATH, so npm install -g @anthropic-ai/claude-code gives you claude straight away, and pnpm and yarn work through Corepack. See the sandbox environment.
Private previews work inside your own site's iframe
Set an iframe's src to a preview's urlWithToken: the link keeps its token for your site alone, a paused sandbox shows its waking page in the frame and reloads by itself, and a public preview skips its warning page when it is framed. See previews.
Disk-only snapshots
mode: "disk" on a snapshot keeps only the root filesystem, and a sandbox created from it boots fresh with your files and no saved processes. Memory snapshots stay the default. See the API.
Faster disks, shared fairly
A sandbox's disk no longer has a fixed speed or a burst to run out. It shares its server's drives with the sandboxes beside it, in proportion: at least about 40 MB/s each way, and up to about 1 GB/s when its neighbours are quiet. A busy neighbour slows your writes a little rather than stalling them, and a pause stays quick on a busy server. See the sandbox environment.