Code tab management?
Pico-8 0.1.11 code tabs are implemented as comment lines that look like scissors:

```
code in tab 0
-->8
code in tab 1
-->8
code in tab 2
```

For any cart processing that cares about code tabs, this is easy to manage with just strings. It's possible for lua.py to model tabs and manage this on behalf of the client. I mention it here in case anyone wants to upvote or comment on this idea, but it's probably a low priority.