Send Notification

Environment Detection

Check which method is available:

# Linux desktop
echo $DISPLAY

# ntfy.sh remote
echo $NTFY_SH_PRIVATE_TOPIC

# macOS
uname -s

Methods

Condition	Method
$DISPLAY non-empty	Linux desktop (notify-send)
uname -s = Darwin	macOS (terminal-notifier)
$NTFY_SH_PRIVATE_TOPIC non-empty	Remote via ntfy.sh
None of the above	Fallback: write to /tmp/claude-notify

Linux Desktop

notify-send -a "claude" -u critical "Claude" "<message>"

macOS

terminal-notifier -title "Claude" -message "<message>"

Remote via ntfy.sh

User must set up topic first:

export NTFY_SH_PRIVATE_TOPIC="your-secret-topic-name"

Send:

curl -s -d "<message>" "https://ntfy.sh/$NTFY_SH_PRIVATE_TOPIC"

Privacy: ntfy.sh topics are public. Never include sensitive data in notifications.

Fallback

echo "$(date -Iseconds): <message>" >> /tmp/claude-notify