line is 128 characters (lll)

SA1006: printf-style function with dynamic format string and no further arguments should use print-style function instead (staticcheck)

S1002: should omit comparison to bool constant, can be simplified to `*flagColorize` (gosimple)

S1002: should omit comparison to bool constant, can be simplified to `*flagPretty` (gosimple)

File is not `gofumpt`-ed with `-extra` (gofumpt)

File is not `gofumpt`-ed with `-extra` (gofumpt)

naked return in func `constructCodec` with 134 lines of code (nakedret)

missing cases in switch of type reflect.Kind: reflect.Invalid, reflect.Complex64, reflect.Complex128, reflect.Chan, reflect.Func, reflect.UnsafePointer (exhaustive)

naked return in func `constructCodec` with 134 lines of code (nakedret)

missing cases in switch of type reflect.Kind: reflect.Invalid, reflect.Bool, reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128, reflect.Array, reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer|reflect.Ptr, reflect.Slice, reflect.Struct, reflect.UnsafePointer (exhaustive)

package-comments: package comment is detached; there should be no blank lines between it and the package statement (revive)