Lifecycle

When you press Play, Loom starts up and loads your UI automatically. The bridge is live as soon as the UI page renders. State pushes, action calls, and events all flow from that point.

On Stop

When you exit Play mode, the bridge disposes and any C# event subscriptions are released. The Vite dev server keeps running between Play sessions for fast restart; restart it manually with Loom -> Restart Dev Server if it misbehaves.

On Editor restart

After installing or upgrading the Loom Unity package, fully restart Unity. Closing and reopening the scene is not enough; you must restart the Editor.

In player builds

The Vite dev server is editor-only. In player builds, the UI is loaded from Application.streamingAssetsPath/Loom/index.html, which Vite’s production build emits.