Custom statusline script for Claude Code CLI showing repo name, git branch (with dirty indicator), color-coded context usage, session cost, duration, lines changed, and active model name.

statusline.sh

#!/bin/bash

# Read JSON input once
input=$(cat)

# Extract fields
cwd=$(echo "$input" | jq -r '.workspace.current_dir')
ctx_pct=$(echo "$input" | jq -r '.context_window.used_percentage // 0' | cut -d. -f1)
cost=$(echo "$input" | jq -r '.cost.total_cost_usd // 0')
cost_fmt=$(printf '$%.2f' "$cost")
dur_ms=$(echo "$input" | jq -r '.cost.total_duration_ms // 0')
mins=$((dur_ms / 60000))
added=$(echo "$input" | jq -r '.cost.total_lines_added // 0')
removed=$(echo "$input" | jq -r '.cost.total_lines_removed // 0')
model=$(echo "$input" | jq -r '.model.display_name // "unknown"')

# Context color
if [ "$ctx_pct" -ge 60 ]; then
  ctx_color='\033[01;31m' # red
elif [ "$ctx_pct" -ge 40 ]; then
  ctx_color='\033[01;33m' # yellow
else
  ctx_color='\033[01;32m' # green
fi

# Cost color (red above $1)
cost_color='\033[00m'
cost_cents=$(echo "$cost" | awk '{printf "%d", $1 * 100}')
[ "$cost_cents" -ge 100 ] && cost_color='\033[01;31m'

# Git info
branch=""
dirty=""
repo=$(basename "$cwd")
if git -C "$cwd" rev-parse --git-dir > /dev/null 2>&1; then
  branch=$(git -C "$cwd" symbolic-ref --short HEAD 2>/dev/null || echo "detached")
  dirty_count=$(git -C "$cwd" status --porcelain 2>/dev/null | wc -l | tr -d ' ')
  [ "$dirty_count" -gt 0 ] && dirty="*"
fi

printf '\033[01;36m%s\033[00m \033[02m%s%s\033[00m | ctx: %b%s%%\033[00m | %b%s\033[00m | %sm | \033[32m+%s\033[00m \033[31m-%s\033[00m | %s' \
  "$repo" "$branch" "$dirty" \
  "$ctx_color" "$ctx_pct" \
  "$cost_color" "$cost_fmt" \
  "$mins" \
  "$added" "$removed" \
  "$model"