Skip to content

CLI Reference

There are nine entry points:

Any other first argument is an unknown subcommand and exits 2.

The CLI commands also have TUI actions: n creates a VM, R resets it, S opens a shell, l opens Landing, and v pastes an image from the board. The Landing pane also offers publishing to drupal.org. The CLI and TUI share the checks and operations behind these actions.

sand

Run with no arguments, sand launches the interactive TUI: it lists instances, streams a build's progress, and drives the same create/reset/ delete/start/stop lifecycle as the headless commands below. See The TUI for the keybindings and screens.

sand create

Usage: sand create [flags]

Headlessly provision a development VM for coding agents: no TUI, no prompts. Every
flag has a default: --git-name/--git-email fall back to the host's git config
(user.name/user.email), so on a machine with git configured `sand create`
needs no flags. If neither the flags nor the host git config supply an
identity, sand errors rather than fabricate a commit author. Flags mirror the
original bash provisioner's, minus --ref (the playbook is embedded in this
binary, so there is no ref to pin).

It never prompts: every flag has a default (or falls back to something on the host), and a missing required value — git identity — is a validation error, not a prompt.

Flags

Flag Type Default Description
--name string claude VM name. Checked against the target backend's own naming rule before anything is built — see VM names.
--base-name string sandbar-base Base image instance name; clones are made from this shared, long-lived image.
--hostname string same as --name VM hostname. Empty means EffectiveHostname() falls back to --name.
--user string the host username (id -un, then $USER, then claude) Primary VM user. A guest user matching the host username is created for you, so this mirrors that — it is never sent empty, since an empty user_name would override the Ansible user role's own default and break in-guest user creation.
--git-name string host git config user.name git user.name written into the VM. See git identity below.
--git-email string host git config user.email git user.email written into the VM. See git identity below.
--cpus string (parsed as int) 2 vCPUs. Must be a positive integer.
--memory string 8GiB RAM, e.g. 8GiB.
--disk string 100GiB Disk size, e.g. 100GiB. See disk sizing below.
--locale string en_US.UTF-8 System locale.
--timezone string the timezone this host is in IANA timezone for the guest, e.g. America/Toronto. See timezone below.
--domain string lan Domain suffix.
--docker-proxy-host string (empty — disabled) Docker registry pull-through proxy host. Optional; when set, sand also forces on devtools_docker_registry_proxy_enabled.
--clone-url string (empty — no clone) HTTPS repo to clone into the VM. Optional.
--clone-token string (empty) GitHub or GitLab token for --clone-url. Optional; see credential handling below.
--clone-forge string auto auto, github, or gitlab. Auto detects github.com and gitlab.com; select gitlab for self-hosted GitLab.
--recreate bool false Delete and re-clone --name if it is sand-managed. The older spelling of sand reset NAME, which does the same thing and can additionally preserve state — see --rebuild vs --recreate.
--rebuild bool false Delete and rebuild the base image first, then create.
--template string (empty) Clone from the named golden template, bypassing the shared base. Mutually exclusive with --rebuild, --recreate, and an explicit --base-name.
--profile string the last-used Connection Profile, else local Which connection profile to create the VM on. Only that one profile is built and preflighted — the rest of your fleet is untouched. A named profile that doesn't exist, or is disabled, is a validation error.
--with-claude bool remembered, initially false Install current Claude Code in this VM.
--with-codex bool remembered, initially false Install current Codex in this VM.
--with-opencode bool remembered, initially false Install current OpenCode in this VM.
--with-pi bool remembered, initially false Install current Pi in this VM.
--with-ddev bool true Deprecated and ignored; DDEV is always in the base image.
--with-go bool true Deprecated and ignored; Go is always in the base image.
--with-java bool true Deprecated and ignored; a headless JDK is always in the base image.

Agent flags configure the individual VM. Omitted flags use the last submitted agent selections, shared across profiles; explicit flags (including =false) win. All four may be off. See preference migration for existing installations. Reset uses the selections recorded for that VM. Likewise --recreate adopts that VM's recorded agents unless explicit agent flags override them. Reset and recreate do not change the global preferences.

DDEV, Go, and a headless JDK ship in the published base image, so sand create and the TUI no longer ask about them. --with-ddev, --with-go, and --with-java are still accepted so existing scripts keep working, but they have no effect.

When --template is set, the saved template is the clone source and the shared base is not inspected or rebuilt. The new VM records that provenance, so sand reset NAME continues cloning from the same template.

VM names

Lima and Proxmox accept different VM names:

Name Lima (local or remote) Proxmox
dev-box Allowed Allowed
test_vm Allowed Rejected: underscores are not allowed in DNS names.
web--1 Rejected: separators must be single characters. Allowed
-web, web- Rejected Rejected
my vm Rejected Rejected

For a name accepted by both, use ASCII letters and digits separated by single hyphens, with a letter or digit at each end and no more than 63 characters. For example: dev-box.

sand create and the TUI create form check the name before building and explain any invalid character or format. Reset operations keep the existing name and skip this check, so a VM created under older naming rules can still be rebuilt.

There is no --ref flag

If you go looking for one — the original bash provisioner had --ref to pin the git ref of a checked-out playbook — it does not exist here, deliberately. cmd/sand/create.go explains why in a comment next to where the flags are registered: the playbook is embedded in the sand binary at build time (playbook_embed.go), so there is no separate ref left to pin. Whichever sand binary you run is the playbook version.

--git-name / --git-email fall back to host git config

Neither flag is required. If you omit --git-name, sand reads git config user.name on the host; if you omit --git-email, it reads git config user.email. On a machine that already has a git identity configured, sand create with no flags at all is enough.

sand only errors when both the flag and the host git config are empty for a given field — it refuses to fabricate a commit author. The error names the missing field and tells you to pass the flag or set it with git config --global user.name "..." (or user.email).

--timezone follows the host

VMs used to run in UTC — not by choice, but because nothing set a timezone at all and the Debian/Ubuntu cloud images ship UTC. That made every log line, ls -l, date, and commit timestamp inside a VM disagree with the machine you were reading them on.

sand now reads the timezone of the host it is running on and provisions the guest to match, so sand create with no flags gives you a VM whose clock agrees with your own. Pass --timezone with an IANA name (--timezone Asia/Tokyo) to override.

The host's zone is detected from, in order: $TZ (including the :Zone and :/path/to/zoneinfo/Zone forms, and an empty TZ=, which POSIX defines as UTC), /etc/timezone, and the target of the /etc/localtime symlink — which covers Linux and macOS. If none of those give a usable answer, sand falls back to Etc/UTC, which is exactly the old behaviour, and says so on stderr rather than quietly handing you a VM with the wrong clock.

Legacy aliases (US/Eastern, Canada/Eastern, Japan) live in Debian's separate tzdata-legacy package, which the base image does not install. Where your host has one, sand resolves it to the canonical name by following the host's own tzdata symlink, so US/Eastern reaches the guest as America/New_York and simply works.

What happens to a zone the guest genuinely doesn't have depends on who chose it:

  • You named it with --timezone — the run stops with an error. You asked for a specific zone, and finishing would hand you a VM that is silently not in it.
  • sand detected it from your host — the run continues, prints a warning, and leaves the guest's existing zone. Your create can't be broken by something you never asked for.

Malformed names (a leading /, a .., shell metacharacters) are rejected up front by every entrypoint, before they can reach the playbook.

The timezone is applied in both provisioning phases, so a VM cloned from a base image built before this feature existed — or built while you were in a different timezone — still lands in the right zone. It is deliberately not part of the base image's version stamp, so changing timezone does not force a base rebuild.

--clone-token is a credential

--clone-token (and the rest of the create-time variables) is never placed on a command line inside the guest. sand streams the rendered Ansible extra-vars — including the token, when set — over stdin into /dev/shm (tmpfs) inside the VM, writes it with mode 0600, and removes it in an EXIT trap once the provisioning run for that phase finishes. It never touches the VM's persistent disk and never appears in a process listing.

--rebuild vs --recreate

These sound similar and do different things to different objects:

  • --rebuild deletes and rebuilds the shared base image (--base-name, default sandbar-base) before creating. Use it when the base itself needs to pick up a playbook or dependency change that a VM cloned from it right now is not going to get, or if the base image is corrupted. It is independent of --recreate and the two may be combined.
  • --recreate deletes and re-clones this VM (--name). It uses the VM's recorded settings for flags you omit, including its base image, resources, hostname, Git identity, and clone URL. Explicit flags override those settings; for example, --recreate --disk 200GiB changes the disk size. The target must already be managed by sand.

Prefer sand reset NAME in new scripts. It performs the same rebuild and also lets you preserve guest data. --recreate always deletes everything on the guest disk.

You cannot pass --clone-url with --recreate: a rebuild keeps the recorded project URL. Create another VM to work on a different repository.

Tokens are never recorded in the managed index. A rebuild reuses the saved global GitHub token or matching scoped GitLab token from the host secrets store. Pass --clone-token to override it. See credential handling.

Disk sizing

The base image is always built at a fixed 20GiB floor (vm.BaseDiskFloor), regardless of --disk — --disk sizes the clone, not the base. Each clone is then grown from that floor up to --disk once, before its first start (on a Lima profile, limactl edit --set '.disk=...'; on Proxmox, a disk resize through the API).

Because the underlying qcow2 disk can grow but not shrink live, a --disk smaller than the 20GiB floor is not something you can actually get: asking for less does not shrink the clone below the floor it started at.

samba_enabled does not apply here

Lima's Debian image role supports Samba-based host-home sharing, and its own Ansible defaults may say otherwise, but sand forces samba_enabled: false for every VM it creates (internal/provision/vars.go) — there is no host-home mount to share in the first place (see Files & shells). If you see samba_enabled mentioned anywhere in the underlying role's defaults, it does not apply to anything sand create does.

Examples

# Minimal — host git identity, all other defaults.
sand create

# Clone a private repo into the VM at create time.
sand create --name myproj --clone-url https://github.com/org/repo.git \
  --clone-token "$GITHUB_TOKEN"

# Clone from a self-hosted GitLab instance (explicit forge selection required).
sand create --name tools --clone-url https://git.example.internal/platform/tools/app.git \
  --clone-forge gitlab --clone-token "$GITLAB_TOKEN"

# Non-default resources, explicit identity.
sand create --name big --cpus 8 --memory 16GiB --disk 200GiB \
  --git-name "Jane Dev" --git-email jane@example.com

# Create on a specific connection profile (see Connection Profiles).
sand create --profile work

Verified --help output

$ sand create --help
Usage: sand create [flags]

Headlessly provision a development VM for coding agents: no TUI, no prompts. Every
flag has a default: --git-name/--git-email fall back to the host's git config
(user.name/user.email), so on a machine with git configured `sand create`
needs no flags. If neither the flags nor the host git config supply an
identity, sand errors rather than fabricate a commit author. Flags mirror the
original bash provisioner's, minus --ref (the playbook is embedded in this
binary, so there is no ref to pin).

Examples:
  sand create                                                   # host git identity
  sand create --git-name "Your Name" --git-email you@example.com
  sand create --profile work                                    # create on the "work" connection profile

Flags:
  -base-name string
        Base image instance name (default "sandbar-base")
  -clone-forge string
    Git service: auto detects github.com and gitlab.com; choose gitlab for self-hosted GitLab (default "auto")
  -clone-token string
    Token for github.com or gitlab.com (self-hosted GitLab: --clone-forge gitlab; never placed on guest argv)
  -clone-url string
        HTTPS repo to clone into the VM (optional)
  -cpus string
        vCPUs (default "2")
  -disk string
        Disk size, e.g. 100GiB (default "100GiB")
  -docker-proxy-host string
        Docker registry pull-through proxy host (optional)
  -domain string
        Domain suffix (default "lan")
  -git-email git config user.email
        git user.email (default: host git config user.email)
  -git-name git config user.name
        git user.name (default: host git config user.name)
  -hostname string
        VM hostname (default: same as --name)
  -locale string
        System locale (default "en_US.UTF-8")
  -memory string
        RAM, e.g. 8GiB (default "8GiB")
  -name string
        VM name (default "claude")
  -profile string
        Connection profile to create on (default: the last-used profile, else "local")
  -rebuild
        Destroy the base image and rebuild it from scratch before creating (a stale base is otherwise converged in place)
  -recreate
        Delete and re-clone the named instance if it is sand-managed. The older spelling of 'sand reset NAME', which does the same thing and can also preserve agent settings, the project, selected paths, or the whole home directory
  -timezone string
        IANA timezone for the guest, e.g. America/Toronto (default: the timezone this host is in)
  -user string
        Primary VM user
  -with-claude
        Install Claude Code when creating this VM (default: last submitted selection)
  -with-codex
        Install OpenAI Codex when creating this VM (default: last submitted selection)
  -with-ddev
        Deprecated and ignored: this tool is always part of the base image (default true)
  -with-go
        Deprecated and ignored: this tool is always part of the base image (default true)
  -with-java
        Deprecated and ignored: this tool is always part of the base image (default true)
  -with-opencode
        Install OpenCode when creating this VM (default: last submitted selection)
  -with-pi
        Install Pi when creating this VM (default: last submitted selection)

(--user has no printed default because it is resolved to the host username after flags are parsed, not at registration time — see the flags table above.)

sand reset NAME

Rebuild a VM managed by sand from its base image. The name, project URL, and recorded settings are kept; guest files are deleted unless you choose a preserve option. This is the CLI equivalent of R in the TUI (Resetting a VM).

sand reset web                                    # clean rebuild, same settings
sand reset web --preserve-agents                  # keep coding-agent state
sand reset web --preserve-agents --preserve-project
sand reset web --preserve '~/src/app' --preserve '~/scratch/spike'
sand reset web --preserve-home                    # keep the guest home
sand reset web --cpus 8 --memory 16GiB            # change CPU and memory

sand refuses to reset a VM it does not manage. It checks the VM's ownership marker first, then the managed index. You can reset a VM created by another sand controller on the same host.

Flag What survives
--preserve-agents Settings and files for Claude Code, Codex, OpenCode, and Pi.
--preserve-project The project's organisation directory, including the checkout, uncommitted work, and .env. Skips cloning again if the checkout is present, so a private repository needs no clone token.
--preserve PATH A directory inside the guest home, including a Git checkout or linked worktree. Repeat for more directories.
--preserve-home The guest home, including everything above, except ~/.ssh/authorized_keys.

--preserve accepts an absolute guest path (/home/you/src/app), a quoted tilde path ('~/src/app'), or a home-relative path (src/app). Quote ~ so your workstation's shell does not expand it to your host home directory. Run sand land NAME to list cached checkout paths. Paths outside the guest home are rejected before the VM is deleted.

Use --preserve-home to keep your files while updating a working VM. The home is copied back before the provisioning playbook runs, so Ansible can update the files it manages. The rebuilt VM keeps its new ~/.ssh/authorized_keys so sand can still connect. Preserving the whole home copies more data than preserving individual directories.

Before it backs up or deletes anything, a reset makes sure the base image is ready: it downloads a replacement when the local one is stale or missing. If that fails, for example because you are offline, sand stops with the VM and its data untouched, and a stale base is kept rather than deleted. Only then does it back up and delete the VM.

Preserved data passes through a private (0700) directory on your workstation. After a successful reset, sand removes that copy. If the reset fails before attempting to delete the VM, it also removes the copy: the original VM still has the data. If deletion has been attempted, sand keeps the archives and prints their path for recovery. See If a reset fails after the VM was deleted.

Do not preserve data from a VM you suspect is compromised. The copy can include credentials and anything an agent wrote in the selected directories. See Security Model.

Files outside the directories you preserve are deleted. Nothing outside the guest home, such as /srv or /opt, can be preserved by these options.

If a reset fails after the VM was deleted

When a reset fails after it deleted the VM, for example because the clone ran out of disk space, the VM is gone and the only copy of your preserved data is the backup directory. The error names it and says how to finish:

reset failed after staging; your data is preserved at /home/you/.local/state/sandbar/staging/sand-reset-123456789: <cause>

To finish this reset once the cause is fixed: sand reset web --from-backup /home/you/.local/state/sandbar/staging/sand-reset-123456789

Fix the cause, then run that command. It rebuilds web with the settings the failed reset recorded, restores the backup in the same order a normal reset does, and removes the directory once everything is back. If it fails again, the directory is kept and you can retry.

  • The backup directory contains reset.json beside the archives. It records the VM's settings and what was backed up. It never contains the clone token, so cloning reuses the saved host token. Pass --clone-token if no token is saved or to override it.
  • The VM must not exist. --from-backup completes a reset; it never overwrites a running VM. If you already created a replacement, delete it first.
  • Don't combine --from-backup with the --preserve flags. The backup says what it holds.
  • Other flags, such as --memory, override the recorded settings, as they do in a normal reset.
  • The VM no longer exists, so sand can't discover its connection profile. Pass --profile when more than one profile is enabled.
  • A backup made by an older sand has no reset.json. A whole-home or agent-state backup still restores, using the VM's entry in the managed index or defaults for its settings. A backup that holds a project or checkout archive is refused, because the paths inside it aren't recorded. Extract those with tar by hand.

The TUI reports the same error and path. Finish the reset from a terminal with the command above.

Watching a copy run

Large directories can take several minutes to back up and restore. sand reports progress in the CLI output, the TUI progress log, and the VM tile:

==> Backing up home…
==> Backing up home: 910 MB, 76 MB/s
==> Backed up home: 1.6 GB in 24s, 68 MB/s
…
==> Restoring home: 59% of 1.6 GB, 82 MB/s
==> Restored home: 1.6 GB in 21s, 78 MB/s

Backup progress shows bytes copied and transfer rate. Restore progress also shows a percentage, because the completed archive's size is known. Copies that finish before the first reporting interval have no progress updates.

Archives are compressed inside the source VM using zstd when available, or the slower gzip otherwise. sand reports when it falls back to gzip. An older source VM may lack zstd; refreshing the base image affects future clones, not the VM being backed up. sand create --rebuild rebuilds the base before creating a VM.

Flags

Flag Type Default Description
--preserve-agents bool false Keep settings and files for Claude Code, Codex, OpenCode, and Pi.
--preserve-project bool false Keep the project's per-org directory.
--preserve string (repeatable) (none) Keep one more directory inside the guest home. Pass it once per directory.
--preserve-home bool false Keep the entire guest home directory; implies the three flags above.
--cpus string (parsed as int) this VM's vCPUs.
--memory string this VM's RAM, e.g. 16GiB.
--disk string this VM's Disk size. A clone's disk can grow but never shrink, so a smaller value is not something you can actually get (see disk sizing).
--hostname string this VM's VM hostname.
--user string this VM's Primary VM user.
--git-name / --git-email string this VM's git identity written into the guest.
--locale string this VM's System locale.
--timezone string this VM's IANA timezone. Naming one explicitly makes an unknown zone fatal in the guest, exactly as it does on sand create.
--domain string this VM's Domain suffix.
--docker-proxy-host string this VM's Docker registry pull-through proxy host.
--clone-token string (empty) GitHub or GitLab token for this VM's recorded repo. Blank reuses the saved global GitHub or matching scoped GitLab token. An explicit token replaces the saved token after success. A restored checkout skips cloning.
--from-backup string (directory) (none) Finish a reset that failed after the VM was deleted: rebuild NAME and restore the backup in this directory. See If a reset fails after the VM was deleted.
--profile string the profile that owns NAME Which Connection Profile NAME lives on. Only needed when the same name exists under more than one enabled profile.

NAME is required (exactly one positional argument), and flags may appear before or after it.

Omitted flags use the VM's recorded settings. Explicit flags override them, and the new settings become the defaults for the next reset.

There is no --clone-url

A reset keeps the VM's recorded project URL. This ensures the project named by a preserve option is the project restored after the rebuild. To work on another repository, create another VM with sand create. sand create --recreate --clone-url ... is also rejected, and the TUI locks the repository URL during a reset.

There is no --base-name: a reset uses the VM's recorded base image. There is also no --rebuild, which replaces the shared base image and belongs to sand create.

Secrets are re-applied

A reset ends by writing the VM's host-stored secrets into the rebuilt guest, so the VM comes back with the environment it had. sand create does the same after a build, and additionally records --clone-token as the GH_TOKEN secret for GitHub or scoped GITLAB_TOKEN for GitLab so it can be rotated later without a rebuild. See GitHub and GitLab tokens.

Verified --help output

$ sand reset --help
Usage: sand reset NAME [flags]

Delete a sand-managed VM and clone it fresh from its base image, keeping its
name, its project, and every setting it was built with. This is the headless
spelling of the TUI's R (Reset).

Everything inside the guest is lost unless you ask for it back:

  --preserve-agents    keep settings, credentials, sessions, and history for
                       Claude Code, Codex, OpenCode, and Pi
  --preserve-project   keep the cloned project's per-org directory (the checkout,
                       its uncommitted work, and the .env alongside it)
  --preserve PATH      keep one more directory inside the guest home — any git
                       checkout or worktree, whether sand cloned it or you did.
                       Repeatable. Run 'sand land NAME' to list what this VM
                       holds. Paths may be absolute (/home/you/src/app), tilde
                       (~/src/app) or home-relative (src/app).
  --preserve-home      keep the WHOLE home directory, then re-run the playbook
                       on top of it. This is the one to use when the VM is fine
                       and you only want an up-to-date build; it implies every
                       flag above.

All of these copy data out of the VM to this host and back in afterwards. Do NOT
preserve anything from a VM you believe is compromised.

Every other flag you omit is taken from the VM's own recorded settings, so
'sand reset web' means "give me this VM back". Pass one to change it:
'sand reset web --disk 200GiB' resizes on the way through.

There is no --clone-url: a reset rebuilds the project this VM already has. To
work on a different repo, create another VM with 'sand create'.
A blank --clone-token reuses the saved GitHub or scoped GitLab token for cloning.
An explicit token replaces the saved token after a successful reset.

If a reset fails after the VM was deleted, the error names a directory holding
your backup. Finish the job with:

  sand reset NAME --from-backup DIR

That rebuilds NAME with the settings the failed reset recorded, restores the
backup in the usual order, and removes DIR once everything is back. The VM must
not exist (the failed reset already deleted it). Pass --profile if NAME's
connection profile is not the only enabled one.

Examples:
  sand reset web                                  # clean rebuild, same settings
  sand reset web --preserve-agents                # keep coding-agent state
  sand reset web --preserve-agents --preserve-project
  sand reset web --preserve ~/src/app --preserve ~/scratch/spike
  sand reset web --preserve-home                  # keep everything, rebuild the OS
  sand reset web --cpus 8 --memory 16GiB          # rebuild bigger

Flags:
  -clone-token string
        Token for this VM's recorded repo (GitHub or GitLab); blank reuses its saved token
  -cpus string
        vCPUs (default: whatever this VM has)
  -disk string
        Disk size, e.g. 100GiB (default: whatever this VM has; a clone's disk can grow but never shrink)
  -docker-proxy-host string
        Docker registry pull-through proxy host (default: whatever this VM has)
  -domain string
        Domain suffix (default: whatever this VM has)
  -from-backup DIR
        Finish a reset that failed after deleting the VM: rebuild NAME and restore the backup in DIR (the path the failure named)
  -git-email string
        git user.email written into the VM (default: whatever this VM has)
  -git-name string
        git user.name written into the VM (default: whatever this VM has)
  -hostname string
        VM hostname (default: whatever this VM has)
  -locale string
        System locale (default: whatever this VM has)
  -memory string
        RAM, e.g. 8GiB (default: whatever this VM has)
  -preserve PATH
        Keep one more directory PATH inside the guest home (repeatable); run 'sand land NAME' to list this VM's checkouts
  -preserve-agents
        Keep settings and files for Claude Code, Codex, OpenCode, and Pi across the rebuild
  -preserve-home
        Keep the ENTIRE guest home directory across the rebuild (implies the other --preserve-* flags)
  -preserve-project
        Keep the cloned project's per-org directory (checkout + .env) across the rebuild
  -profile string
        Connection profile NAME lives on (only needed when NAME exists under more than one enabled profile)
  -timezone string
        IANA timezone for the guest (default: whatever this VM has)
  -user string
        Primary VM user (default: whatever this VM has)

sand template

Golden templates are named snapshots of managed VMs. They are scoped to a Connection Profile, just like VMs.

sand template snapshot dev golden
sand template list
sand create --name next --template golden
sand template delete golden

snapshot briefly stops a running source so the clone is consistent, then restores its original power state. list reports size, source, creation date, and whether the recorded playbook version is current. delete warns about dependent VMs but does not delete them; those VMs keep running but cannot be reset from the removed template. All subcommands accept --profile.

See Golden Templates for the complete workflow.

sand shell NAME

Attach a shell to NAME's persistent tmux session in the guest. This is the same attach path the TUI's S key uses, so the two entrypoints never drift.

Usage: sand shell NAME [--profile <name>] [--cc]

Attach a shell to NAME's persistent tmux session in the guest.

  C-a c   new window          C-a d   detach
  C-a |   split vertically    C-a S   split horizontally

Detaching — or just closing the terminal — leaves the session and everything
running in it alive; attach again with this same command and it is all still
there. Note C-a is tmux's prefix here, so it no longer moves the cursor to the
start of the line.

A second terminal running this command shares the same windows but keeps its
own current one, so two terminals can look at two different windows of the
same VM.

--cc attaches in tmux control mode instead. In a terminal that speaks the
protocol, each guest window becomes a native tab, so C-a c opens a real tab
rather than a window drawn inside this one. iTerm2 is the reference
implementation; WezTerm implements a subset; the list is not exhaustive and
sand does not detect your terminal, it just starts a tmux -CC client.
Run it from a plain terminal window: a host tmux pane strips the control-mode
handshake, so --cc refuses when $TMUX is set.

The named VM must already exist and be running (see 'sand' to list instances,
or 'sand create' to make one). If NAME is managed under more than one
connection profile, --profile picks which one to attach to.

NAME is required (exactly one positional argument); --profile and --cc may each appear before or after NAME. sand shell refuses a VM that does not exist or is not running.

--cc attaches in tmux control mode, so a terminal that speaks the protocol renders the guest's tmux windows as native tabs. It refuses when $TMUX is set, because a host tmux pane strips the handshake control mode needs — see Native terminal tabs with tmux -CC for both ways to get native tabs and why you can only have one of them at a time.

Cross-profile resolution for sand shell

Because the same VM name can exist under more than one Connection Profile, sand shell NAME resolves which one you mean like this:

  1. --profile <name> given explicitly — used directly. An unknown or disabled profile name is a hard error.
  2. With no --profile: if only one connection profile is enabled, sand shell uses it directly (this is also what a single-profile setup — the out-of-the-box default — always does, so nothing changes if you never create a second profile).
  3. With more than one enabled profile: sand shell looks up which enabled profile's registry actually owns a VM named NAME. Zero owners is "no such VM"; exactly one owner is used automatically; more than one owner (the same name exists on two profiles) is an error asking you to pass --profile to disambiguate, and lists the profile names it's ambiguous between.

sand paste-image NAME

Stage the host clipboard's image on a running VM's guest clipboard, ready for Ctrl-V inside Claude Code, Codex, OpenCode, or Pi in the guest.

Usage: sand paste-image NAME [--profile <name>]

Read the host clipboard image and stage it on NAME's guest clipboard at
<guest-home>/.sand/clip/latest.png, ready for Ctrl-V inside the guest.

The named VM must already exist and be running (see 'sand' to list instances,
or 'sand create' to make one). If NAME is managed under more than one
connection profile, --profile picks which one to target.

If the host clipboard holds no image, nothing is staged and the command
exits non-zero.

NAME is required (exactly one positional argument); --profile may appear before or after NAME. The command requires a running VM. If the host clipboard contains only text or is empty, it reports "no image on clipboard" and exits with a non-zero status.

How it works

When you run sand paste-image, sand reads the clipboard image only on the machine running sand (your workstation), verifying an image type is advertised before fetching any bytes. The image is then written into the guest at a single-slot path in one step. Read-only xclip and wl-paste shims serve agents that invoke clipboard commands; a private headless X display serves agents such as Codex that use the X11 clipboard API directly.

Security: The feature is structured to prevent clipboard text from leaking into the guest. It never reads clipboard text; it gates the clipboard read on an advertised image/* type, and the guest shims have no text-serving path at all.

Cross-profile resolution for sand paste-image

Like sand shell, sand paste-image NAME resolves which connection profile you mean using the same logic described above under sand shell's Cross-profile resolution.

sand land NAME

List NAME's git checkouts and their branch/push/PR state, or act on one. This is the same detection and the same gh actions the TUI's l (Land) key uses — see Landing.

Usage: sand land NAME [PATH] [--pr | --web | --review [--clean]] [--profile <name>]

List NAME's git checkouts and their branch/push/PR state, or act on one:

  sand land NAME                list checkouts + branch/push/PR state
  sand land NAME PATH --pr      open a one-shot draft PR for PATH's pushed branch
  sand land NAME PATH --web     open PATH's branch (or PR) in a browser
  sand land NAME PATH --review  review PATH's changes in a browser, served from the VM
  sand land NAME PATH --review --clean
                                the same, discarding any review already saved there

--pr uses the workstation's own 'gh' (never the guest's token). Without gh
it prints the compare URL and, on a terminal, offers to open it; piped or
scripted, it exits non-zero with the URL on stderr so automation can react.
--web never needs gh: it opens a constructed GitHub URL, which redirects to
an existing PR for the branch on its own.

--review needs no pushed branch, no remote and no gh at all: it runs a review
server inside the VM against PATH, opens it in a browser on this machine, and
blocks until you finish the review — which writes review.xml into PATH inside
the VM, where the agent can read it. Nothing leaves the VM. The review tool is
part of every base image; a base older than the tool itself picks it up on the
next 'sand create'.

A review.xml already in PATH is carried into the new review, so comments you
wrote earlier are there to keep, edit or drop. Nothing ever removes that file
on its own, so --clean is how you start over: it deletes the saved review and
its walkthrough sidecar first. A repository cloned during provisioning already
has the review tool's assistant skills. For a repository cloned later, run
`self-review-install-skills PATH` inside the VM; it installs the skills and
keeps them and the review files out of `git status`.

The named VM must already exist and be running (see 'sand' to list
instances, or 'sand create' to make one). If NAME is managed under more than
one connection profile, --profile picks which one to act on.

With no PATH or flags, sand land NAME prints a table (PATH KIND BRANCH PUSH PR) of every checkout the sweep found, including a count of the commits that exist nowhere but the VM for an unpushed branch (unpushed (+3)) and the PR's number/state when one exists (#42 open (draft)).

A branch whose commits are all published somewhere, but which no longer matches its own pushed copy — the usual result of a rebase — reads diverged rather than unpushed (+0): there is nothing there to lose.

--pr PATH, --web PATH and --review PATH require a PATH from that listing, and are mutually exclusive. --clean modifies --review: it discards any review already saved in that checkout before starting, and is refused (rather than ignored) alongside any other action.

  • --pr and --web both refuse a checkout that isn't pushed or has no recognized remote — there's nothing to open a PR or browser page against yet.
  • --pr opens a one-shot draft PR via the workstation's own gh. Without gh installed, it instead prints the branch's compare URL: on a real terminal it offers to open that URL in a browser (y/N prompt); in a script or pipe (no terminal) it does not prompt — it exits non-zero with the compare URL as the only text on stderr, so automation can capture and act on it.
  • --web is gh-free by construction: it never calls gh at all. It opens a constructed GitHub compare URL in a browser, which GitHub's own routing redirects to an existing open PR for that branch when one exists.
  • --review has no pushed-branch or remote precondition at all — reviewing uncommitted or unpushed work is the point. See Reviewing changes in a browser for the full workflow.

sand land does not commit or push. With --pr, it reads the guest's metadata and calls gh on the workstation. With --review, the server runs inside the VM and sends the diff to your browser over a loopback connection. It does not copy a checkout onto your workstation. See Reachability.

Submitting a review saves review.xml in the guest checkout, or at the output-file path configured for self-review. The agent can read that file directly. self-review-install-skills adds the default review files and installed skills to the guest user's active global Git excludes file. See Keeping review files out of commits if the repository already tracks those files.

sand publish NAME PATH [ISSUE]

Publish PATH's local commits (inside the VM named NAME) to the drupal.org issue fork for issue ISSUE, using the workstation's own drupal.org token — never a credential inside the VM. This is the same publication logic (internal/drupalorg) the TUI's Landing pane offers as its publish to drupal.org row; see Publishing to drupal.org for what it does, what the confirmation shows, and what to know before you rely on it.

Usage: sand publish NAME PATH [ISSUE] [--yes] [--allow-outside-issue-namespace] [--profile <name>]

Publish PATH's local commits (inside the VM named NAME) to the drupal.org
issue fork for issue ISSUE, using the workstation's own drupal.org token —
never a credential inside the VM. Prints the destination and every commit
and file that will change, then asks for confirmation before writing
anything; declining publishes nothing.

ISSUE may be omitted when PATH was cloned from its issue fork: such a
checkout's origin remote is "issue/<module>-<ISSUE>", which already names
the issue, so it is read from there. Give ISSUE explicitly to override that,
or when the checkout's remote is the canonical "project/<module>" repository
and so names no issue at all.

The named VM must already exist and be running (see 'sand' to list
instances, or 'sand create' to make one). If NAME is managed under more than
one connection profile, --profile picks which one to act on.

ISSUE is optional. If you cloned the issue fork — the normal way to work an issue — the checkout's own origin already spells the issue out (git@git.drupal.org:issue/<module>-<ISSUE>.git, or the HTTPS spelling https://git.drupalcode.org/issue/<module>-<ISSUE>.git), and sand publish reads it from there, printing the number it derived before the confirmation so you can see what it settled on:

$ sand publish web /home/u/dubbot
sand publish: issue 3619578, read from this checkout's remote

Pass ISSUE yourself to override that, or when the checkout was cloned from the canonical project/<module> repository — that remote names no issue, so there is nothing to derive and sand publish says so rather than guessing.

sand publish refuses immediately, before touching the VM or drupal.org at all, if no workstation drupal.org PAT is on file — see Setup for where that file goes. Given a running VM and a PAT, it resolves the destination, collects PATH's change set, prints the full confirmation (every commit, author, and file change — never a summary), and then requires an explicit human act before publishing anything:

  • --yes confirms non-interactively. It is the only sanctioned non-interactive route, and it is never read from an environment variable — pass it only after you've reviewed the printed confirmation yourself. Without it, a non-terminal stdin (a script or pipe) refuses outright rather than publishing silently; on a real terminal you're prompted [y/N] instead.
  • --allow-outside-issue-namespace is the only way to let the commit destination fall outside the issue/<module>-<issue> fork namespace — and so the only way to publish straight to a canonical drupal.org project rather than an issue fork. This is not the normal path; see Publishing to drupal.org for why that guard exists.
  • --profile picks which connection profile NAME is resolved on, the same as every other command that names a VM.

After a successful publish, sand publish fetches the fork branch in the guest and reports how your checkout compares — the replay creates new commits with new SHAs, so the two diverge by construction. When their content is identical and your tree is clean, it offers to reset the checkout onto the published commits. That offer is a separate question from --yes, which confirms only the publish; without a terminal the command to run is printed instead. See Your checkout after a publish.

If every local commit is already in the checkout's upstream branch or the canonical project's base branch, sand publish reports nothing to publish and exits without prompting. It first reads the destination anonymously from drupal.org to identify that base branch.

If the range contains a merge commit, sand publish names it and stops without publishing anything. Rebase onto the project's base branch before your first publish. See Rebase onto the base branch.

The printed report lists every change-set commit in order — its status (landed, already-present, failed, or not-attempted) and its SHA on the fork where it has one — followed by the merge request's URL (opened, or already open) and any warnings. A replay that fails partway is reported exactly as far as it got; re-running sand publish is how you recover, and A failure partway explains why that — rather than repairing the fork by hand — is the supported path.

Publication only ever appends to the fork's branch; sand publish has no force push and cannot rewrite or remove a commit it already published. That also means rewriting your local history after a publish is not supported — an amended commit whose message and author are unchanged is reported already-present and its amendment is never sent. See There is no force push.

sand version / sand --version

Prints the build identity and exits. Both spellings do the same thing, and --version is checked before anything else in sand's argument dispatch, so it works even without limactl installed.

A released binary prints the version GoReleaser stamped in at build time (-ldflags "-X main.version=..."). A binary built from source instead prints the git revision Go's toolchain embeds automatically, with a -dirty suffix if the working tree had uncommitted changes at build time — for example:

$ sand --version
07bae1a-dirty