Week of April 24, 2026

<Tip> **Released this week:** [v0.3.14](https://github.com/superradcompany/microsandbox/releases/tag/v0.3.14) </Tip>

New features

Block-backed OCI rootfs

Image rootfs now ships as a packed VMDK with EROFS metadata and copy-on-write overlays instead of an extracted directory, cutting boot time and host disk usage. See the images overview.

Other features

• Sandbox-wide guest rlimits. Apply default RLIMIT_* values to every process inside the guest.
• execStreamWithConfig in the TypeScript SDK. Stream stdout/stderr while passing the same per-exec options as execWithConfig.
• Run microsandbox via cargo, npx, and pipx. cargo install microsandbox, npx microsandbox, and pipx run microsandbox all bring up a working CLI.

Bug fixes

• The SDK now self-heals when the bundled msb binary is missing, re-downloading it on demand.