cue cmd -t prod -t name=bar tag tags.cue tags_tool.cue
cmp stdout expect-stdout

-- expect-stdout --
prod: bar
-- tags.cue --
package tags

var: env: "prod" | "staging" @tag(env,short=prod|staging)
var: name: string  @tag(name)

-- tags_tool.cue --
package tags

import "tool/cli"

command: tag: cli.Print & {
    text: "\(var.env): \(var.name)"
}