```ucm
scratch/main> builtins.merge
```

```unison
foo : Nat
foo = 5

bar : Nat
bar = 5
```

```ucm
scratch/main> add
```

```unison
foo : Nat
foo = 6

bar : Nat
bar = 7
```

```ucm
scratch/main> update
scratch/main> view foo bar
```