cueimports is a CUE tool that updates your import lines, adding missing ones and removing unused ones.

It scans through:

• your local packages
• the cue.mod directory packages
• the standard library packages

go install github.com/asdine/cueimports/cmd/cueimports@latest

$ echo "data: json.Marshal({a: math.Sqrt(7)})" | cueimports

import (
	"encoding/json"
	"math"
)

data: json.Marshal({a: math.Sqrt(7)})