claude-later: sleep until a time then run claude

claude-later

#!/usr/bin/env bash

set -euo pipefail

usage() {
    echo "Usage: claude-later <time> [claude args...]"
    echo "  claude-later 2:00am -p \"write hello world in go\""
    echo "  claude-later 14:30 -p \"summarize my notes\""
    exit 1
}

[[ $# -lt 1 ]] && usage

TARGET_TIME="$1"
shift

# Parse target epoch
TARGET_EPOCH=$(date -d "$TARGET_TIME" +%s 2>/dev/null) || {
    echo "Error: can't parse time '$TARGET_TIME'" >&2
    exit 1
}

NOW_EPOCH=$(date +%s)

# If the time has already passed today, target tomorrow
if [[ "$TARGET_EPOCH" -le "$NOW_EPOCH" ]]; then
    TARGET_EPOCH=$(date -d "tomorrow $TARGET_TIME" +%s)
fi

SLEEP_SECONDS=$(( TARGET_EPOCH - NOW_EPOCH ))
WAKE_AT=$(date -d "@$TARGET_EPOCH" "+%Y-%m-%d %I:%M %p")

echo "Sleeping until $WAKE_AT (${SLEEP_SECONDS}s from now)..."
sleep "$SLEEP_SECONDS"

echo "Waking up — updating claude..."
claude update

echo "Running: claude $*"
claude "$@"