Five Hour Window Tracker

#!/usr/bin/env bash

# 5-Hour Session Window Tracker for Claude Code
# Tracks Claude's unique 5-hour rolling session window

# Read JSON from stdin
read -r input

# Extract session duration in milliseconds
total_duration_ms=$(echo "$input" | jq -r '.cost.total_duration_ms // 0')

# Convert to minutes and hours
duration_minutes=$((total_duration_ms / 60000))
duration_hours=$((duration_minutes / 60))
remaining_minutes=$((duration_minutes % 60))

# 5-hour window is 300 minutes
WINDOW_LIMIT=300
time_remaining=$((WINDOW_LIMIT - duration_minutes))

# Calculate percentage of window used
if [ $duration_minutes -gt 0 ]; then
  percentage_used=$(( (duration_minutes * 100) / WINDOW_LIMIT ))
else
  percentage_used=0
fi

# Prevent overflow (sessions can continue beyond 5 hours in practice)
if [ $percentage_used -gt 100 ]; then
  percentage_used=100
  time_remaining=0
fi

# Color coding based on window usage
if [ $percentage_used -lt 50 ]; then
  STATUS_COLOR="\033[38;5;46m"   # Green: < 50% used
  STATUS_ICON="✓"
elif [ $percentage_used -lt 80 ]; then
  STATUS_COLOR="\033[38;5;226m"  # Yellow: 50-80% used
  STATUS_ICON="⚠"
else
  STATUS_COLOR="\033[38;5;196m"  # Red: > 80% used
  STATUS_ICON="⏰"
fi

# Build progress bar (20 characters wide)
bar_filled=$(( percentage_used / 5 ))  # Each char = 5%
bar_empty=$(( 20 - bar_filled ))
bar=$(printf "█%.0s" $(seq 1 $bar_filled))$(printf "░%.0s" $(seq 1 $bar_empty))

# Format time remaining
if [ $time_remaining -gt 60 ]; then
  remaining_hours=$((time_remaining / 60))
  remaining_mins=$((time_remaining % 60))
  time_display="${remaining_hours}h ${remaining_mins}m"
elif [ $time_remaining -gt 0 ]; then
  time_display="${time_remaining}m"
else
  time_display="EXPIRED"
fi

RESET="\033[0m"

# Output statusline
echo -e "${STATUS_ICON} 5H Window: ${STATUS_COLOR}${bar}${RESET} ${percentage_used}% | ${STATUS_COLOR}${time_display}${RESET} left"

{
  "format": "bash",
  "position": "left",
  "refreshInterval": 1000
}