Pre-built VM images (kernel + rootfs) for sbx.

Each release contains:

• vmlinux-{arch} - Linux kernel binary from Firecracker CI
• rootfs-{arch}.ext4 - Alpine Linux ext4 rootfs
• manifest.json - Release manifest with artifact metadata

Images are consumed by sbx image pull:

sbx image pull v0.1.0
sbx create --from-image v0.1.0 my-sandbox

# Build all artifacts (requires sudo for rootfs).
make build

# Generate manifest.json from built artifacts.
make manifest VERSION=v0.1.0

Build parameters are defined in config.yaml:

• Kernel version and Firecracker CI source
• Rootfs distro, version, and package profile
• Firecracker version (metadata only, binary not bundled)
• Target architectures

1. Update config.yaml if needed
2. Push changes via PR, CI validates the build
3. Create and push a semver tag: git tag v0.1.0 && git push origin v0.1.0
4. Release workflow builds artifacts and creates a GitHub Release