> ## Documentation Index
> Fetch the complete documentation index at: https://docs.microsandbox.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Week of April 24, 2026

> Block-backed OCI rootfs, guest rlimits, and TypeScript SDK improvements.

<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](/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.