# How to Serve a Local Lab `biosimulant labs serve` opens the bundled local lab UI for a runnable lab source tree, `.bsilab` package, or public registry reference. ## Install ```bash pipx install biosimulant ``` No UI extra is required. The local web runtime ships with the default package. ## Create a starter lab ```bash biosimulant labs init ./serve-check --name "Serve Check" --force ``` ## Start the UI ```bash biosimulant labs serve ./serve-check ``` The browser opens by default at the root URL, for example `http://127.0.0.1:8765/`. For scripts, servers, and CI runners, suppress browser launch: ```bash biosimulant labs serve ./serve-check --no-open --port 8766 ``` ## What persists - Model, world, runtime, and wiring edits are saved to `lab.yaml`. - Canvas layout is saved to `wiring-layout.json`. - Run history is in memory for the active serve process. **Info:** `/ui` and `/ui/` redirect to `/` for compatibility, but new links and scripts should use the root URL. ## Next steps - [Labs Serve UI Reference](/references/library/labs-serve) - [Custom Visualizations](/how-to/library/custom-visualizations) - [Write a lab.yaml](/how-to/library/write-lab-manifest)