package main

// Shared by the plugin's hooks (novox/hq ADR 0489 §5): a notice on exit 0 — the stop hook failing open or
// letting a wait through, the session-start hook unable to use a session id — reaches the operator's screen,
// not only the log. Claude Code shows a hook's top-level "systemMessage" field to the person; stderr alone,
// on an allowed (exit 0) outcome, is never shown there.

import (
	"encoding/json"
	"fmt"
	"io"
)

// writeSystemMessage prints message as the one JSON object Claude Code shows the operator, falling back to
// the plain words on the one error that cannot happen (a string always marshals).
func writeSystemMessage(w io.Writer, message string) {
	raw, err := json.Marshal(map[string]string{"systemMessage": message})
	if err != nil {
		fmt.Fprintln(w, message)
		return
	}
	fmt.Fprintln(w, string(raw))
}