Made a little test command to confirm nohup works. Nohup doesn't keep running on windows but that's expected.

sleeper/.gitignore

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+sleeper
+sleeper.exe

sleeper/Makefile

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+
+
+build:
+	go build .

sleeper/go.mod

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+module lcthw.dev/go/go-coreutils/sleeper
+
+go 1.25.3

sleeper/main.go

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+package main
+
+import (
+  "fmt"
+  "time"
+  "flag"
+  "log"
+)
+
+func main() {
+  wait_for := "1s"
+  message := "test"
+
+  flag.StringVar(&wait_for, "d", "1s", "go time duration to parse")
+  flag.Parse()
+
+  if flag.NArg() > 0 {
+    message = flag.Args()[0]
+  }
+
+  for {
+    to_wait, err := time.ParseDuration(wait_for)
+    if err != nil { log.Fatal(err) }
+
+    time.Sleep(to_wait)
+    fmt.Println(message)
+  }
+}