sandlot

A CLI for branch-based development using git worktrees and Lima VMs. Each branch gets its own worktree and isolated VM.

Prerequisites

macOS on Apple Silicon
Bun
Lima (brew install lima)
Git

Install

git clone https://github.com/your/sandlot
cd sandlot
bun install
bun link

Usage

Run all commands from inside a cloned git repo.

Start a session

sandlot new fix-POST

Creates a worktree at .sandlot/fix-POST/, boots a Lima VM mapped to it, and drops you into a shell.

Other commands

sandlot list           # show all sessions
sandlot open <branch>  # re-enter a session's VM
sandlot stop <branch>  # stop a VM without destroying it
sandlot rm <branch>    # tear down session (VM, worktree, local branch)

Use git directly for commits, pushes, merges, etc. The worktree is a normal git checkout.

Project config

Optionally add a sandlot.json to your repo root:

{
  "vm": {
    "cpus": 4,
    "memory": "8GB",
    "image": "ubuntu:24.04",
    "mounts": { "/path/to/deps": "/deps" }
  }
}

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