Development record

Two flag pairs are mutually exclusive, but neither flag's help says so. site build --preview and --version (internal/surface/cli/site.go:88; help at site.go:83-87; docs/reference/cli/commands.md:4732-4733). update --check and --yes (internal/surface/cli/update.go:156; help at update.go:154-155; commands.md:4898-4899). A reader of the reference learns of either pairing only from cobra's error.