Online RootFS growth
On growth-enabled images, Sandbox0 automatically expands the writable RootFS as free space runs low, within a configured sparse logical ceiling up to 64 TiB. Agent processes keep running. Growth is enabled in the qualified Cloud region; confirm activation for other regions. Existing images and snapshots retain their captured storage geometry. The ceiling is logical capacity, not preallocated host disk.
Lux inference and screenshot/action adapters do not establish an automatically expanding Linux RootFS. The execution host determines whether installed packages, configuration and accumulated outputs survive. Sandbox0 supplies that separate durable runtime layer.