dev-server-sandbox

To run multiple isolated dev-server instances in parallel, you can create temporary LATTICE_ROOT environments with automatically allocated free ports, allowing simultaneous development sessions across different git worktrees without configuration conflicts.

A dev-server sandbox is a temporary, isolated environment that runs independent dev-server instances. You need it when testing multiple configurations simultaneously across different git worktrees or running parallel test workflows that require distinct ports.

Set up parallel testing across git worktrees by launching a sandboxed dev-server that creates fresh temporary LATTICE_ROOT directories, copies optional provider and project configs, allocates free ports, and applies environment overrides for each instance.

Yes, you can use existing provider and project configs. The sandbox automatically copies optional providers.jsonc and config.json files when present, applying them to the isolated LATTICE_ROOT environment before launching the server.

Yes, the sandbox handles port allocation by automatically selecting free ports for each dev-server instance. It enables broad host access to support port-forwarding and multi-instance workflows across parallel sandboxed environments.

The best way to test isolated configurations simultaneously is creating temporary LATTICE_ROOT directories for each dev-server sandbox, which allocates free ports and launches independent instances with specific environment overrides from different git worktrees.