After Go1.16, how do you write Go sketches in vim?

Question

vim

After 1.16 modules became default. Accordingly, gopls(Go language server) only works with go.mod go.sum. I used to write sketches, just to see what the code is running in the $GOPATH/scratch tree and all the vim+gopls(show definition, autocompletion) conveniences worked. Now they don't work. Obviously gopls (Go's language server protocol implementation) wants to see go.mod. What is it, to start a separate module for each draft? Am I just uncomfortable or how do you deal with it? Suggest best practices.)

Answer 1

I just have one go.mod for all drafts, which I copy.
module temp