claude code statusline

statusline.sh

#!/bin/bash
# Optimized statusline for Claude Code
# - Single jq call (fast)
# - No node check, no bc dependency
# 
# ENV OPTIONS:
#   STATUSLINE_SHOW_COST=1  Show $$
#   STATUSLINE_TIMING=1     Show script exec time

[ "${STATUSLINE_TIMING:-0}" = "1" ] && _start=$(date +%s%3N)

export TERM=xterm-256color

# Read stdin first (JSON from Claude Code), then process with jq
json=$(cat)

# Single jq call extracts everything (tab-separated)
IFS=$'\t' read -r cwd model used_pct cost < <(
  echo "$json" | jq -r '[
    (.workspace.current_dir // ""),
    (.model.display_name // ""),
    (.context_window.used_percentage // 0 | tostring),
    (.cost.total_cost_usd // 0 | tostring)
  ] | @tsv'
)

# Convert to integer
pct=${used_pct%%.*}
pct=${pct:-0}

# Colors
RED=$'\033[31m'; GREEN=$'\033[32m'; YELLOW=$'\033[33m'
BLUE=$'\033[34m'; MAGENTA=$'\033[35m'; CYAN=$'\033[36m'
GRAY=$'\033[90m'; RESET=$'\033[0m'
SEP="${GRAY}│${RESET}"

short_dir="${cwd##*/}"

# Git branch (single command with dirty check)
git_info=""
if cd "$cwd" 2>/dev/null; then
  if git_branch=$(git rev-parse --abbrev-ref HEAD 2>/dev/null); then
    git diff --quiet 2>/dev/null && git diff --cached --quiet 2>/dev/null && dirty="" || dirty="*"
    [ ${#git_branch} -gt 20 ] && git_branch="${git_branch:0:17}..."
    [ -n "$dirty" ] && bc="$YELLOW" || bc="$CYAN"
    git_info=" ${SEP} ${bc} ${git_branch}${dirty}${RESET}"
  fi
fi

# Python venv (concise, warns if mismatched with project)
venv_info=""
venv_name=""
[ -n "$VIRTUAL_ENV" ] && venv_name="${VIRTUAL_ENV##*/}"
[ -z "$venv_name" ] && [ -n "$CONDA_DEFAULT_ENV" ] && venv_name="$CONDA_DEFAULT_ENV"
if [ -n "$venv_name" ]; then
  # Truncate long names (max 12 chars)
  [ ${#venv_name} -gt 12 ] && venv_name="${venv_name:0:10}.."
  # Warn (yellow) if venv doesn't seem to match project dir
  if [[ "$short_dir" == *"$venv_name"* ]] || [[ "$venv_name" == *"$short_dir"* ]] || [[ "$venv_name" == ".venv" ]] || [[ "$venv_name" == "venv" ]]; then
    vc="$GREEN"
  else
    vc="$YELLOW"  # Possible mismatch
  fi
  venv_info=" ${SEP} ${vc}🐍${venv_name}${RESET}"
fi

# Timestamp of this update (for tracking cache expiry - 5 min inactivity)
time_info=" ${SEP} ${CYAN}$(date +%H:%M)${RESET}"



# Token display: progress bar (uses used_percentage from API which includes cache)
token_info=""
if [ "$pct" -gt 0 ]; then
  if [ "$pct" -ge 75 ]; then pc="$RED"
  elif [ "$pct" -ge 50 ]; then pc="$YELLOW"
  else pc="$GREEN"; fi

  filled=$((pct * 8 / 100)); [ "$filled" -gt 8 ] && filled=8; [ "$filled" -lt 1 ] && filled=1
  bar="${pc}"; for ((i=0;i<filled;i++)); do bar+="▓"; done
  bar+="${GRAY}"; for ((i=filled;i<8;i++)); do bar+="░"; done
  token_info=" ${SEP} ${bar}${RESET} ${GRAY}${pct}%${RESET}"
fi

# Cost (hidden by default, set STATUSLINE_SHOW_COST=1 to display)
cost_info=""
if [ "${STATUSLINE_SHOW_COST:-0}" = "1" ] && [ -n "$cost" ] && [ "$cost" != "0" ] && [ "$cost" != "null" ]; then
  cost_fmt=$(awk -v c="$cost" 'BEGIN {printf "%.2f", c}')
  cost_info=" ${SEP} ${GRAY}\$${cost_fmt}${RESET}"
fi

# Model (compact with version: "O 4.6", "S 4", "H 3.5")
model_info=""
if [ -n "$model" ]; then
  # Extract version number (e.g., "4.6" from "Claude Opus 4.6" or "4" from "Claude Sonnet 4")
  ver=$(echo "$model" | grep -oE '[0-9]+\.?[0-9]*' | head -1)
  case "$model" in
    *Opus*)   mc="$MAGENTA"; ms="◆"; mn="O${ver:+ $ver}" ;;
    *Sonnet*) mc="$BLUE";    ms="◇"; mn="S${ver:+ $ver}" ;;
    *Haiku*)  mc="$GREEN";   ms="○"; mn="H${ver:+ $ver}" ;;
    *)        mc="$GRAY";    ms="●"; mn="$model" ;;
  esac
  model_info=" ${SEP} ${mc}${ms} ${mn}${RESET}"
fi

# Self-timing (if enabled)
timing_info=""
if [ "${STATUSLINE_TIMING:-0}" = "1" ]; then
  _end=$(date +%s%3N)
  _elapsed=$((_end - _start))
  timing_info=" ${SEP} ${GRAY}${_elapsed}ms${RESET}"
fi

printf "${BLUE}%s${RESET}%s%s%s%s%s%s%s" \
  "$short_dir" "$git_info" "$venv_info" "$time_info" "$token_info" "$cost_info" "$model_info" "$timing_info"