go-modern-guidelines

Why we included this project

AI coding assistants write a lot of Go, but what they produce often looks like the language stopped moving around Go 1.10: manual loops where range-over-int works, nil-check chains where cmp.Or would do. JetBrains packaged a practical fix as agent instructions. Point Claude Code, Codex, Cursor, Junie, or a skills.sh agent at them and the assistant reads your go.mod, limits itself to the features and stdlib additions that version supports, and prefers modern idioms like slices.Contains over hand-rolled loops. The guidelines also cover very recent stuff most models never trained on, such as the new(42) pointer helper and the type-safe error matching of errors.AsType[T] from Go 1.26. It is the same goal as the Go team's modernize analyzer, but for new code, so there is less to clean up later.