Claude Code custom statusline: model [effort] + cwd (git branch) + context bar with token usage and color thresholds

statusline-command.sh

#!/bin/bash

input=$(cat)

model_raw=$(echo "$input" | jq -r '.model.display_name // .model.id // "claude"')
cwd=$(echo "$input" | jq -r '.workspace.current_dir // .cwd // ""')
effort=$(echo "$input" | jq -r '.effort_level // .effortLevel // empty')
output_style=$(echo "$input" | jq -r '.output_style.name // ""')

# Fall back to settings.json — Claude Code doesn't pass effortLevel via stdin
if [ -z "$effort" ]; then
    effort=$(jq -r '.effortLevel // empty' "$HOME/.claude/settings.json" 2>/dev/null)
fi

total_tokens=$(echo "$input" | jq -r '(.context_window.total_input_tokens // 0) + (.context_window.total_output_tokens // 0)')
context_size=$(echo "$input" | jq -r '.context_window.context_window_size // 0')
used_pct=$(echo "$input" | jq -r '.context_window.used_percentage // empty')

# Strip "(1M context)" — redundant with progress bar
model=$(echo "$model_raw" | sed -E 's/ *\([^)]*\)//g')

dir_base=$(basename "$cwd" 2>/dev/null)

branch=""
if [ -n "$cwd" ] && [ -d "$cwd" ]; then
    branch=$(git -C "$cwd" rev-parse --abbrev-ref HEAD 2>/dev/null)
fi

format_tokens() {
    local n=$1
    if [ "$n" -ge 1000000 ]; then
        printf "%s" "$(echo "scale=1; $n/1000000" | bc -l | sed 's/\.0$//')M"
    elif [ "$n" -ge 1000 ]; then
        printf "%dK" $((n / 1000))
    else
        printf "%d" "$n"
    fi
}

RED=$'\033[1;31m'
YELLOW=$'\033[1;33m'
RESET=$'\033[0m'

# Build segments
left="$model"
[ -n "$effort" ] && [ "$effort" != "null" ] && left="$left [$effort]"
[ -n "$output_style" ] && [ "$output_style" != "null" ] && [ "$output_style" != "default" ] && left="$left {$output_style}"

[ -n "$dir_base" ] && left="$left · $dir_base"
[ -n "$branch" ] && left="$left ($branch)"

if [ -n "$used_pct" ] && [ "$used_pct" != "null" ]; then
    bw=10
    f=$(printf "%.0f" "$(echo "$used_pct * $bw / 100" | bc -l)")
    [ "$f" -lt 0 ] && f=0
    [ "$f" -gt "$bw" ] && f=$bw
    e=$((bw - f))
    bar=""
    for ((i=0; i<f; i++)); do bar="${bar}█"; done
    for ((i=0; i<e; i++)); do bar="${bar}░"; done

    tokens_fmt=$(format_tokens "$total_tokens")
    context_fmt=$(format_tokens "$context_size")
    ctx="$bar $(printf "%.0f" "$used_pct")% ($tokens_fmt/$context_fmt)"

    color=""
    [ "$total_tokens" -ge 150000 ] && color="$YELLOW"
    [ "$total_tokens" -ge 300000 ] && color="$RED"

    if [ -n "$color" ]; then
        left="$left · ${color}${ctx}${RESET}"
    else
        left="$left · $ctx"
    fi
fi

printf "%s\n" "$left"

How to reuse

Install on a new machine:

curl -fsSL https://gist.githubusercontent.com/grundmanise/e3417808630e97d4972b75b6c7cefcb7/raw/statusline-command.sh -o ~/.claude/statusline-command.sh
chmod +x ~/.claude/statusline-command.sh

Wire it up in ~/.claude/settings.json:

{
  "statusLine": {
    "type": "command",
    "command": "~/.claude/statusline-command.sh"
  }
}

Requires jq and bc on PATH (preinstalled on macOS; brew install jq bc if missing).

Update the gist after local edits:

gh gist edit e3417808630e97d4972b75b6c7cefcb7 ~/.claude/statusline-command.sh

Pull latest changes down to another machine:

curl -fsSL https://gist.githubusercontent.com/grundmanise/e3417808630e97d4972b75b6c7cefcb7/raw/statusline-command.sh -o ~/.claude/statusline-command.sh