How to Customize Your Claude Code Status Line

Ever glanced at Claude Code and wondered which model you’re actually using? Or how much of the context window you’ve burned through? By default, this information is hidden away—but you can surface it right in your terminal.

A custom status line shows you what matters at a glance:

[Opus] Context: 12%

This tells you the active model and context usage without interrupting your flow. Let me show you how to set it up.

Claude Code pipes JSON data to your status line script via stdin. Your script processes that data and outputs whatever text you want displayed.

The JSON contains everything you’d want to know: model info, token counts, costs, and workspace details.

Create a new file at ~/.claude/statusline.sh:

#!/bin/bash
input=$(cat)

MODEL=$(echo "$input" | jq -r '.model.display_name')
INPUT_TOKENS=$(echo "$input" | jq -r '.context_window.total_input_tokens')
OUTPUT_TOKENS=$(echo "$input" | jq -r '.context_window.total_output_tokens')
CONTEXT_SIZE=$(echo "$input" | jq -r '.context_window.context_window_size')

TOTAL_TOKENS=$((INPUT_TOKENS + OUTPUT_TOKENS))
PERCENT_USED=$((TOTAL_TOKENS * 100 / CONTEXT_SIZE))

echo "[$MODEL] Context: ${PERCENT_USED}%"

The script reads JSON from stdin, extracts the fields we care about using jq, calculates the percentage, and outputs the formatted string.

chmod +x ~/.claude/statusline.sh

Add the status line configuration to ~/.claude/settings.json:

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

If you already have settings in this file, add the statusLine block alongside your existing configuration.

Close and reopen Claude Code. Your new status line should appear.

The script receives JSON with these fields:

Want to see how much your session is costing? Extend the script:

#!/bin/bash
input=$(cat)

MODEL=$(echo "$input" | jq -r '.model.display_name')
INPUT_TOKENS=$(echo "$input" | jq -r '.context_window.total_input_tokens')
OUTPUT_TOKENS=$(echo "$input" | jq -r '.context_window.total_output_tokens')
CONTEXT_SIZE=$(echo "$input" | jq -r '.context_window.context_window_size')
COST=$(echo "$input" | jq -r '.cost.total_cost_usd')

TOTAL_TOKENS=$((INPUT_TOKENS + OUTPUT_TOKENS))
PERCENT_USED=$((TOTAL_TOKENS * 100 / CONTEXT_SIZE))

printf "[%s] Context: %d%% | $%.2f" "$MODEL" "$PERCENT_USED" "$COST"

Now you’ll see something like: [Opus] Context: 12% | $0.45

Status line not showing?

1. Check that jq is installed: brew install jq (macOS) or apt install jq (Linux)
2. Verify the script is executable: ls -la ~/.claude/statusline.sh
3. Restart Claude Code after making changes

Test your script manually:

echo '{"model":{"display_name":"Opus"},"context_window":{"total_input_tokens":1000,"total_output_tokens":500,"context_window_size":200000}}' | ~/.claude/statusline.sh

Should output: [Opus] Context: 0%

The status line is one piece of the Claude Code customization puzzle. Once you’re comfortable with scripts like this, explore:

• Notification hooksClaude Code Notifications: Get Alerts When Tasks Finish (Hooks Setup)How to set up Claude Code notifications using hooks. Get desktop alerts when Claude finishes a task, needs your input, or requests permission, instead of watching the terminal.claude-codenotificationshooks+1Nov 23, 2025 to get desktop alerts when Claude needs input
• Slash commandsClaude Code Slash Commands: A Complete Guide (2026)Learn how to transform Claude Code from a chatbot into a deterministic engine using Slash Commands. This guide covers the technical setup and a complete 'Full Circle' workflow that automates your entire feature lifecycle.aiclaude-codeNov 22, 2025 to automate repetitive tasks
• The full Claude Code feature stackClaude Code Explained (2026): MCP, Skills, Subagents, Hooks & PluginsA practical guide to Claude Code's features: MCP, CLAUDE.md, slash commands, subagents, hooks, plugins, skills, and scheduled tasks. Updated April 2026 with deferred tool loading, worktree isolation, agent teams, and more.claude-codeaimcp+2Nov 9, 2025 for MCP, skills, and subagents

The status line script pattern—reading JSON from stdin and outputting formatted text—is the same foundation that powers many of Claude Code’s extensibility features.