go-modernizelisted

# Go Modernize Run Go 1.26's modernization analyzers to bring a package or module up to current idioms. This is not a required cleanup — it's a periodic pass that reduces cognitive load for the next reader. ## Prerequisites - Go 1.26.0 or newer (`go version`). This skill assumes the rewritten `go fix` that ships with 1.26. If on 1.25 or older, stop — the old `go fix` only handles API migrations, not idiom modernization. - Clean working tree. Commit or stash pending changes first. - Working CI (`go test ./...` passes) before starting. ## Step 1: Survey ```bash go version # confirm 1.26+ go fix -diff ./... | head -200 ``` Skim the diff for: - **Surprises**: any change you wouldn't want (rare, but possible in generated code or hand-tuned hot paths). These go on a skip list. - **Volume**: if it's hundreds of files, split the modernization across multiple PRs by package/subtree rather than one megadiff. ## Step 2: Know which analyzers run Go 1.26's `go fix` runs the modernize analyzer set. Key transformations: | Pattern | Becomes | |------------------------------------------|--------------------------------------| | `var x = new(T); *x = v` | `x := new(v)` (Go 1.26 `new(expr)`) | | `interface{}` | `any` | | `fmt.Sprintf("%s", x)` where x is string | `x` | | Manual `min(a, b)` / `max(a, b)` help