diff --git a/contrib/osc-prompt.sh b/contrib/osc-prompt.sh
new file mode 100644
index 000000000..9cb9b4bdd
--- /dev/null
+++ b/contrib/osc-prompt.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+__osc_prompt() {
+    # Git has a precedence
+    if git rev-parse --quiet --git-dir >/dev/null 2>&1 ; then
+        # Test for the existence of bash function
+        declare -F __git_ps1 >/dev/null && printf "%s" "$(__git_ps1 "$@")"
+        return
+    fi
+    # Are we even in the OSC checkout?
+    [ -d .osc ] || return
+
+    local osc_binary osc_pattern osc_str;
+    osc_binary=$(type -p osc)
+    if [ -n "$1" ] ; then osc_pattern="${*}" ; else osc_pattern="(%s)" ; fi
+    if [ -n "$osc_binary" ] && [ -x "$osc_binary" ] && [ -f .osc/_package ] ; then
+        osc_str="$(osc status 2>/dev/null |cut -d' ' -f 1|sort|uniq -c|tr -d ' \n')"
+        # shellcheck disable=SC2059
+        printf " ${osc_pattern}" "$osc_str"
+    fi
+}