> For the complete documentation index, see [llms.txt](https://engine.sygnal.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://engine.sygnal.com/future/dev-team-notes/engine-mode.md).

# Engine Mode

## Initiate Debugging

From VSCode; 

* Open a terminal window with `` CTRL+` ``  
* Switch to bash, if needed

```
npm run build
```

Open a second terminal pane, by clicking the split pane button. 

```
npm run serve
```

> Now the code is running locally

In the site, you can change the engine mode 

```
?engine.mode=dev
```

```
?engine.mode=prod
```