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claude-code-statusline: Instructions file for Claude Code

CLAUDE.md

claude-code-statusline CLAUDE.md is an instructions file for Claude Code from fjlmcm/claude-code-statusline. It costs 964 tokens per session, scanned B, original, MIT.

A project instruction file for a Claude Code terminal status bar, a command-line display showing session, Git, context, and Anthropic usage information. It documents the Node.js project’s commands, architecture, and core files.

In plain words
What is it for?
Use it when developing, testing, installing, uninstalling, or troubleshooting this status-bar tool. It is also a reference for changing its rendering, configuration, quota, or language-related code.
Why use it?
It helps a coding agent understand how the status bar receives data, assembles its output, and reads configuration and usage information. It also records the correct test and installation commands.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: reads .claude/ paths; mentions CLAUDE.md; names the TodoWrite tool.

This is fjlmcm/claude-code-statusline's own configuration. It tells Claude Code how to work on claude-code-statusline itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-code-statusline configures →

not rated 3repo 7mo ago B scan 964 tokens original MIT
View source ↗ fjlmcm/claude-code-statusline
Reuse

Borrowing it

Nothing to install: this file belongs to fjlmcm/claude-code-statusline. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/fjlmcm/claude-code-statusline/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/fjlmcm/claude-code-statusline

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/fjlmcm/claude-code-statusline/claude-md"><img src="https://agentmods.dev/badge/instructions/fjlmcm/claude-code-statusline/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/fjlmcm/claude-code-statusline/claude-md"><img src="https://agentmods.dev/badge/instructions/fjlmcm/claude-code-statusline/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 964 This file is loaded in full into every session.
When invoked 964 The same file — it is already loaded in full.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00964 $0.00964
Opus 5.5 $0.00386 $0.00386
Sonnet 5.5 $0.00193 $0.00193
Haiku 4.5 $0.00096 $0.00096

Measured 2mo ago against content hash 03003748da29, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

claude-code-statusline CLAUDE.md scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- **setup.js** — Idempotent: copies scripts to `~/.claude/plugins/claude-code-statusline/`, sets `statusLine.command` in `~/.claude/settings.json`
CLAUDE.md · 49 lines

How it starts

The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Claude Code statusline plugin — a Node.js CLI tool that renders a live status bar in Claude Code's terminal showing model info, git status, context usage, and real-time Anthropic API quota data. Supports 9 languages and two layout modes (expanded/compact).

Commands

  • Run tests: npm test (uses Jest)
  • Run a single test file: npx jest tests/render.test.js
  • Manual install (for dev): node ccsl-install.js
  • Manual uninstall: node ccsl-uninstall.js
  • Test statusline output directly: pipe JSON to node scripts/statusline.js

Architecture

The entry point is scripts/statusline.js. It reads JSON session data from stdin, assembles state from lib modules, and writes ANSI-formatted output to stdout.

Core modules (scripts/lib/)

  • config.js — ANSI constants, path definitions (~/.claude/ files), config loading (file + env vars), credential reading (file or macOS Keychain), plan detection from OAuth subscription type
  • quota.js — Fetches quota from api.anthropic.com/api/oauth/usage via OAuth token; uses atomic file-based cache (usage_cache.json); stale cache triggers a detached background child process (--refresh-cache flag); lock file prevents concurrent refresh spawns; 429 responses trigger exponential backoff (60s→120s→240s→300s cap) persisted to .backoff file
  • render.js — renderExpanded (2-line) and renderCompact (1-line) layouts; displays remaining quota percentage (100 - used); expanded mode shows 7d per-model breakdown inline (7d left:opus 80% sonnet 23%); color thresholds based on used%: green ≤50%, yellow ≤80%, red >80%; all spaces replaced with NBSP for terminal rendering
  • i18n.js — STRINGS, TIME_FORMATS, DURATION_UNITS for 9 locales (en/zh/ja/ko/fr/de/es/pt/ru); detectLang() checks CCSL_LANG → LANG/LC_ALL → Intl; fill() is a simple {key} template function
  • context.js — Calculates context window usage percentage from used_percentage or token counts
  • git.js — Reads branch from .git/HEAD directly (supports worktrees via gitdir), runs git status --porcelain and git rev-list for dirty/ahead/behind counts
  • transcript.js — Parses Claude Code JSONL transcript (tail 128KB) to count TodoWrite/TaskCreate/TaskUpdate operations for compact mode's task counter
  • debug.js — Conditional logging to ~/.claude/statusline-debug.log when CCSL_DEBUG=1

Read the full file on GitHub · 49 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 49 lines · 964 tokens per session scan B 03003748da29

Subscribe to this mod's changes

claude-code-statusline CLAUDE.md is an instructions file published in the GitHub repository fjlmcm/claude-code-statusline (3 stars, last pushed 7mo ago), licensed MIT. It adds 964 tokens to every session, about $0.0039 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude Codeanthropicclaude-code-plugincliquotastatusline
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