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Claude Code status line builder

Choose workspace and cost fields from the Claude Code stdin JSON, set a separator and display options, then copy a settings.json block and Python status line script. Everything runs locally in your browser, with no account or network connection.

Stdin JSON fields

Claude Code passes these values to your command as JSON on standard input.

This text joins the selected fields. Quotes and backslashes are escaped in the Python script.

Extra horizontal character spacing. The default is 0.

Re-run the command every N seconds. The minimum is 1 second.

Live terminal preview

Sample data

Dir: billing-api | Repo: billing-api | +128 | -31

Preview shows sample workspace and session cost data; your script runs locally.

Your settings.json block

{
  "statusLine": {
    "type": "command",
    "command": "python3 ~/.claude/statusline.py",
    "padding": 0
  }
}

Your statusline.py script

#!/usr/bin/env python3
import json
import os
import sys

data = json.load(sys.stdin)
workspace = data.get("workspace", {})
cost = data.get("cost", {})
SEPARATOR = " | "

repo = workspace.get("repo") or {}

parts = []
current_dir = os.path.basename(workspace.get("current_dir") or data.get("cwd") or "")
parts.append("Dir: " + current_dir)
repo_label = repo.get("name") or os.path.basename(workspace.get("project_dir") or "")
parts.append("Repo: " + repo_label)
added = cost.get("total_lines_added", 0)
parts.append(f"+{added}")
removed = cost.get("total_lines_removed", 0)
parts.append(f"-{removed}")
print(SEPARATOR.join(parts))

Save and merge the configuration

  • Save the Python script as ~/.claude/statusline.py.
  • Add the statusLine block to ~/.claude/settings.json or your project settings. Merge this block with your existing settings instead of replacing other configuration.
  • The command uses python3 ~/.claude/statusline.py and reads the stdin JSON with defaults for missing fields.

For an alternative, run /statusline inside Claude Code and describe what you want in natural language. Claude Code can generate a script and update your settings automatically. Read the Claude Code status line guide for update behavior and terminal formatting.