$ sbx create shell $CAPTURE/fixtures/repo-kit --name m101-kit --kit ./fixtures/kits/hello-mixin

sandbox    m101-kit
agent      shell
kit        ./fixtures/kits/hello-mixin
workspace  $CAPTURE/fixtures/repo-kit (rw)
image      docker/sandbox-templates:shell-docker
cpu        10
memory     32 GiB

Pulling image
  <layers>
✓ Image ready
→ set 7 environment variable(s)
→ run 1 install command(s)
  $ apt-get update && apt-get install -y tree (kit=hello-mixin, user=0)
  ✓ apt-get update && apt-get install -y tree (kit=hello-mixin, user=0, <dur>)
→ register 1 startup command(s), run on every container start
  + sh -c { command -v apt-get && apt-get update -qq -y || true… (kit=shell, user=root)
  view startup log: cat /var/log/sbx-kit-startup.log
→ copy 1 workspace file(s), after workspace is ready
✓ Created sandbox m101-kit

To connect to this sandbox, run:
  sbx run --name m101-kit
[exit 0]

$ sbx exec m101-kit sh -c 'command -v tree; tree --version | head -1; echo; ls; echo; cat HELLO.md'
/usr/bin/tree
tree v2.3.1 (c) 1996 - 2026 by Steve Baker, Thomas Moore, Francesc Rocher, Florian Sesser, Kyosuke Tokoro

HELLO.md
README.md

Hello from the mixin.
[exit 0]