What is par_cc_usage CLAUDE.md?

Project instructions for PAR CC Usage, a Python command-line tool that tracks Claude Code token usage, costs, billing periods, and live monitoring data from JSONL files.

Setting up the project, running its usage monitor, managing the status-line integration, viewing token and cost data, and running checks and tests.

They give an agent the repository's setup, run, testing, formatting, linting, and type-checking commands so work follows the project's expected workflow.

How paulrobello/par_cc_usage configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to paulrobello/par_cc_usage. 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/paulrobello/par_cc_usage/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/paulrobello/par_cc_usage

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/paulrobello/par_cc_usage/claude-md/github.svg)](https://agentmods.dev/instructions/paulrobello/par_cc_usage/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/paulrobello/par_cc_usage/claude-md"><img src="https://agentmods.dev/badge/instructions/paulrobello/par_cc_usage/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/paulrobello/par_cc_usage/claude-md"><img src="https://agentmods.dev/badge/instructions/paulrobello/par_cc_usage/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 714 This file is loaded in full into every session.

When invoked 714 The same file — it is already loaded in full.

Security scan A 0 findings. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00714	$0.00714
Opus 5.5	$0.00286	$0.00286
Sonnet 5.5	$0.00143	$0.00143
Haiku 4.5	$0.00071	$0.00071

Measured 1mo ago against content hash f4232d71e4ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

par_cc_usage CLAUDE.md scanned grade A with 0 findings 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 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

PAR CC Usage is a Python CLI tool for tracking and analyzing Claude Code token usage. It monitors JSONL files, provides real-time statistics with cost tracking, and manages 5-hour billing blocks.

Quick Start

# Setup
uv sync

# Run monitor
make dev          # Development mode with hot reload
make run          # Normal mode
uv run pccu monitor

# Code quality (run before commits)
make checkall     # Format, lint, and typecheck

# Testing
make test

Key Commands

Status Line Integration

# Install/uninstall Claude Code status line
uv run pccu install-statusline [--force]
uv run pccu uninstall-statusline [--force]

Status line shows: [project] · 🪙 tokens · 💰 cost · ⏱️ time · SES:model · session_tokens

Monitor Options

uv run pccu monitor                 # Default: tools and pricing enabled
uv run pccu monitor --no-tools      # Disable tool usage display
uv run pccu monitor --no-pricing    # Disable pricing display
uv run pccu monitor --no-p90        # Use absolute max instead of P90
uv run pccu monitor --snapshot      # Single snapshot and exit

Configuration & Export

# Update config maximums
uv run pccu update-maximums [--dry-run] [--force]

# Export data
uv run pccu list --format json --output costs.json
uv run pccu list --format csv --output costs.csv

Troubleshooting

# Cache issues
uv run pccu clear-cache              # Clear and rebuild cache
uv run pccu monitor --no-cache       # Run without cache

# Debug commands
uv run pccu debug-unified            # Debug block calculation
uv run pccu test-webhook             # Test notifications

Development Guidelines

Version Management

ONLY bump version when user requests it
Version source: src/par_cc_usage/__init__.py line 3
Update README.md "What's New" section when bumping

Code Standards

Cyclomatic complexity ≤ 10
Type annotations required
Google style docstrings
Run make checkall before commits

Read the full file on GitHub · 98 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.

1mo ago First seen · 98 lines · 714 tokens per session scan A f4232d71e4ab

Subscribe to this mod's changes

par_cc_usage CLAUDE.md is an instructions file published in the GitHub repository paulrobello/par_cc_usage (84 stars, last pushed 4mo ago), licensed MIT. It adds 714 tokens to every session, about $0.0029 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Analytics and metrics Claude Code anthropic-claude cli terminal

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

par_cc_usage: Instructions file for Claude Code