Sandbox Templates and a Sandboxes fleet view

A Sandbox Template names where an agent’s commands run: the Bashkit Virtual Workspace or a managed provider such as Daytona or E2B, with its credential source, durability and lifecycle. Editing a template creates a new immutable revision, and existing sessions keep the revision they started with. An agent’s sandbox policy decides whether a session can pick or override the template.

In the UI: open Sandbox Templates and select New Sandbox Template. The Sandboxes page lists every sandbox across providers and states, with a lifecycle timeline, a Needs attention filter and pause, resume and delete in the detail drawer. Both sit in the collapsible Sandboxes sidebar group.

In code: GET /v1/sandboxes lists the fleet; /stats and /timeline back the page.

See Sandbox Templates and #4199, #4246, #4262.