# Lines Per Minute Tracker

Real-time coding velocity monitor tracking lines added/removed per minute with productivity scoring and daily output projection for Claude Code sessions.

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## Metadata

**Title:** Lines Per Minute Tracker
**Category:** statuslines
**Author:** JSONbored
**Added:** October 2025
**Tags:** productivity, velocity, coding-speed, lines-per-minute, output-tracking
**URL:** https://claudepro.directory/statuslines/lines-per-minute-tracker

## Overview

Real-time coding velocity monitor tracking lines added/removed per minute with productivity scoring and daily output projection for Claude Code sessions.

## Content

#!/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
linesadded=$(echo "$input" | jq -r '.cost.totallines_added // 0')
linesremoved=$(echo "$input" | jq -r '.cost.totallines_removed // 0')
totaldurationms=$(echo "$input" | jq -r '.cost.totaldurationms // 1')
CALCULATE DURATION IN MINUTES (AVOID DIVISION BY ZERO)
if [ "$totaldurationms" -gt 0 ]; then
 durationminutes=$(echo "scale=2; $totalduration_ms / " | bc)
else
 duration_minutes= # Prevent division by zero
fi
CALCULATE NET LINES (ADDED - REMOVED)
netlines=$((linesadded - lines_removed))
CALCULATE TOTAL CHANGED LINES (ADDED + REMOVED)
totalchanged=$((linesadded + lines_removed))
CALCULATE LINES PER MINUTE
if (( $(echo "$duration_minutes > 0" | bc -l) )); then
 addedpermin=$(echo "scale=1; $linesadded / $durationminutes" | bc)
 removedpermin=$(echo "scale=1; $linesremoved / $durationminutes" | bc)
 netpermin=$(echo "scale=1; $netlines / $durationminutes" | bc)
 totalpermin=$(echo "scale=1; $totalchanged / $durationminutes" | bc)
else
 addedpermin=0
 removedpermin=0
 netpermin=0
 totalpermin=0
fi
PRODUCTIVITY SCORING BASED ON TOTAL CHANGES PER MINUTE
if (( $(echo "$totalpermin > 50" | bc -l) )); then
 PROD_COLOR="\[38;5;46m" # Green: High productivity (>50 lines/min)
 PROD_ICON="🚀"
 PROD_RATING="HIGH"
elif (( $(echo "$totalpermin > 20" | bc -l) )); then
 PROD_COLOR="\[38;5;226m" # Yellow: Medium productivity ( lines/min)
 PROD_ICON="📝"
 PROD_RATING="MED"
else
 PROD_COLOR="\[38;5;75m" # Blue: Low/steady productivity ( 0" | bc -l) )); then
 dailyprojection=$(echo "scale=0; $netper_min * " | bc)
else
 daily_projection=0
fi
RESET="\[0m"
FORMAT OUTPUT WITH NET LINES INDICATOR
if [ $net_lines -lt 0 ]; then
 netdisplay="${netlines}"
 net_label="(refactoring)"
else
 netdisplay="+${netlines}"
 net_label="(growth)"
fi
OUTPUT STATUSLINE
echo -e "${PRODICON} ${PRODRATING}: ${PRODCOLOR}${totalpermin} L/min${RESET} | +${addedpermin} -${removedpermin} | Net: ${netdisplay} ${netlabel} | 📅 ${dailyprojection} L/day"
KEY FEATURES
? Real-time lines per minute calculation for added, removed, and net changes
? Productivity scoring based on total change velocity (high >50 L/min, medium , low totallinesadded. This is EXPECTED for refactoring/cleanup sessions. Script correctly labels as '(refactoring)'. If unexpected, verify you're looking at correct session - multi-file refactors often have more deletions than additions.
4) Productivity rating stuck at LOW despite high activity
 Solution: Productivity rating is based on TOTAL changes (added + removed), not net lines. Thresholds: 50 = HIGH. Check totalpermin calculation: (linesadded + linesremoved) / duration_minutes. Adjust thresholds if your baseline velocity differs.
5) bc: command not found when calculating velocity
 Solution: Install bc: brew install bc (macOS), apt install bc (Linux). Alternative: use integer math with awk: awk -v added=$linesadded -v dur=$durationminutes 'BEGIN {print added/dur}' - loses decimal precision but works without bc.
TECHNICAL DETAILS
Documentation: https://docs.claude.com/en/docs/claude-code/statusline
PREVIEW
🚀 HIGH: L/min | + -7.1 | Net: + (growth) | 📅 21, L/day


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Source: Claude Pro Directory
Website: https://claudepro.directory
URL: https://claudepro.directory/statuslines/lines-per-minute-tracker

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