Cheat sheet

The commands most people reach for. Every one takes -d <dir> to run against another project.

Install a project's dependencies from its composer.lock. A vendor/ Composer already wrote is adopted:
```
viv install
```
Install without development dependencies, as on a server or in an image:
```
viv install --no-dev
```
Add a package to composer.json, resolve it and install (alias require):
```
viv add <vendor/package>
```
Remove a package, resolve the rest and install (alias remove):
```
viv rm <vendor/package>
```
Update every dependency, rewrite composer.lock and install:
```
viv update
```
Update one package and its dependencies, leaving the rest at their locked versions:
```
viv update <vendor/package> -w
```
Run a package's command-line tool without adding it to the project, npx-style:
```
viv x <vendor/package>
```
Print an environment report to paste into a bug report:
```
viv diagnose
```

Everything else, with every flag, is on the Commands page.