vercel-sandbox isolation sdk cli agent-dev

Vercel Sandbox now supports forking sandboxes

Fork sandboxes from snapshots with inherited config/env via `Sandbox.fork()`, overriding specific fields as needed.

Summary

Enables parallel sandbox variants and multi-tenant isolation without manual config duplication. Cuts setup time for branched agent workflows and template distribution.

Why it matters

Enables parallel sandbox variants and multi-tenant isolation without manual config duplication. Cuts setup time for branched agent workflows and template distribution.

Implementation verdict

Replaces manual sandbox cloning. Requires SDK upgrade to @vercel/sandbox@latest or CLI to sandbox@latest. Ready now—SDK and CLI both ship the feature today.

Sources

1.The fork starts from the source's current snapshot and inherits its config and environment variables
2.A fork takes about the same time as creating a sandbox, with the same limits
3.If the source has no snapshot, it falls back to a fresh create, using the source's runtime and config
4.Any parameter you pass overrides the inherited value

Dev Signal

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