Lines Per Minute Tracker

#!/usr/bin/env bash

# Lines Per Minute Productivity Tracker for Claude Code
# Calculates coding velocity and productivity metrics

# Read JSON from stdin
read -r input

# Extract values
lines_added=$(echo "$input" | jq -r '.cost.total_lines_added // 0')
lines_removed=$(echo "$input" | jq -r '.cost.total_lines_removed // 0')
total_duration_ms=$(echo "$input" | jq -r '.cost.total_duration_ms // 1')

# Calculate duration in minutes (avoid division by zero)
if [ "$total_duration_ms" -gt 0 ]; then
  duration_minutes=$(echo "scale=2; $total_duration_ms / 60000" | bc)
else
  duration_minutes=0.01  # Prevent division by zero
fi

# Calculate net lines (added - removed)
net_lines=$((lines_added - lines_removed))

# Calculate total changed lines (added + removed)
total_changed=$((lines_added + lines_removed))

# Calculate lines per minute
if (( $(echo "$duration_minutes > 0" | bc -l) )); then
  added_per_min=$(echo "scale=1; $lines_added / $duration_minutes" | bc)
  removed_per_min=$(echo "scale=1; $lines_removed / $duration_minutes" | bc)
  net_per_min=$(echo "scale=1; $net_lines / $duration_minutes" | bc)
  total_per_min=$(echo "scale=1; $total_changed / $duration_minutes" | bc)
else
  added_per_min=0
  removed_per_min=0
  net_per_min=0
  total_per_min=0
fi

# Productivity scoring based on total changes per minute
if (( $(echo "$total_per_min > 50" | bc -l) )); then
  PROD_COLOR="\033[38;5;46m"   # Green: High productivity (>50 lines/min)
  PROD_ICON="🚀"
  PROD_RATING="HIGH"
elif (( $(echo "$total_per_min > 20" | bc -l) )); then
  PROD_COLOR="\033[38;5;226m"  # Yellow: Medium productivity (20-50 lines/min)
  PROD_ICON="📝"
  PROD_RATING="MED"
else
  PROD_COLOR="\033[38;5;75m"   # Blue: Low/steady productivity (<20 lines/min)
  PROD_ICON="✏️"
  PROD_RATING="LOW"
fi

# Project daily output (assuming 8-hour workday = 480 minutes)
if (( $(echo "$net_per_min > 0" | bc -l) )); then
  daily_projection=$(echo "scale=0; $net_per_min * 480" | bc)
else
  daily_projection=0
fi

RESET="\033[0m"

# Format output with net lines indicator
if [ $net_lines -lt 0 ]; then
  net_display="${net_lines}"
  net_label="(refactoring)"
else
  net_display="+${net_lines}"
  net_label="(growth)"
fi

# Output statusline
echo -e "${PROD_ICON} ${PROD_RATING}: ${PROD_COLOR}${total_per_min} L/min${RESET} | +${added_per_min} -${removed_per_min} | Net: ${net_display} ${net_label} | 📅 ${daily_projection} L/day"

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