SSH backend

The remote utility contract, authentication material, and the remote-canonical workspace this backend seeds once.

SSH backend

Use backend: "ssh" to sandbox exec, file tools, and media reads on an arbitrary SSH-accessible machine.

The remote environment must provide /bin/sh, python3, and GNU-compatible stat (-c) and readlink (-f) for the filesystem bridge. These utilities must be available to the non-interactive SSH command, not just an interactive login shell. The Gateway host does not need these remote utilities: a macOS or Windows Gateway can use an SSH target that supplies them. This is a remote utility contract, not a Linux-only Gateway requirement.

{  agents: {    defaults: {      sandbox: {        mode: "all",        backend: "ssh",        scope: "session",        workspaceAccess: "rw",        ssh: {          target: "user@gateway-host:22",          workspaceRoot: "/tmp/openclaw-sandboxes",          strictHostKeyChecking: true,          updateHostKeys: true,          identityFile: "~/.ssh/id_ed25519",          certificateFile: "~/.ssh/id_ed25519-cert.pub",          knownHostsFile: "~/.ssh/known_hosts",          // Or use SecretRefs / inline contents instead of local files:          // identityData: { source: "env", provider: "default", id: "SSH_IDENTITY" },          // certificateData: { source: "env", provider: "default", id: "SSH_CERTIFICATE" },          // knownHostsData: { source: "env", provider: "default", id: "SSH_KNOWN_HOSTS" },        },      },    },  },}

Defaults: command: "ssh", workspaceRoot: "/tmp/openclaw-sandboxes", strictHostKeyChecking: true, updateHostKeys: true.

• Lifecycle: OpenClaw creates a per-scope remote root under sandbox.ssh.workspaceRoot. On first use after create or recreate, it seeds that remote workspace from the local workspace once. After that, exec, read, write, edit, apply_patch, prompt media reads, and inbound media staging run directly against the remote workspace over SSH. OpenClaw does not sync remote changes back to the local workspace automatically.
• Authentication material: identityFile/certificateFile/knownHostsFile reference existing local files. identityData/certificateData/knownHostsData accept inline strings or SecretRefs, resolved through the normal secrets runtime snapshot, written to temp files with mode 0600, and deleted when the SSH session ends. If both a *File and *Data variant are set for the same item, *Data wins for that session.
• Remote-canonical consequences: the remote SSH workspace becomes the real sandbox state after the initial seed. Host-local edits made outside OpenClaw after the seed step are not visible remotely until you recreate the sandbox. openclaw sandbox recreate deletes the per-scope remote root and seeds again from local on next use. Browser sandboxing is not supported on this backend, and sandbox.docker.* settings do not apply to it.