arkor dev

Launch Studio in the browser.

arkor dev boots Studio on http://localhost:4000. Studio is the local web UI where you trigger training runs, watch the run stream, and chat with the resulting model in the Playground.

Run it

pnpm dev

npm run dev

yarn dev

bun dev

Open the URL the CLI prints. Click Run training to spawn a training run against src/arkor/index.ts. Live metrics stream in; once the run completes, the Playground lets you chat with the trained model (mid-run checkpoints are reachable from code via onCheckpoint({ infer })).

arkor dev does not start a training run on its own. It only serves the UI plus the small loopback API the SPA talks to. Training is triggered from the UI.

Need a different port?

Pass --port:

pnpm dev --port 5000

npm run dev -- --port 5000

yarn dev --port 5000

bun dev --port 5000

Add --open to open the browser automatically.

Reference

For the full flag list, the loopback / CSRF security model, and the troubleshooting catalog (port collisions, anonymous bootstrap, token expiry, 403 reasons), see the arkor dev reference.