ccat: Instructions file for Claude Code

CLAUDE.md

ccat CLAUDE.md is an instructions file for Claude Code from nwiizo/ccat. It costs 823 tokens per session, scanned A, original, MIT.

A project guide for Claude Code, an AI coding assistant, describing the ccat Rust command-line tool and how to work on its code.

In plain words
What is it for?
Use it when developing ccat: formatting Rust code, running lint checks, building releases, running tests, benchmarks, or generating documentation.
Why use it?
It gives the assistant and developers shared instructions for installing, checking, testing, and changing the project.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is nwiizo/ccat's own configuration. It tells Claude Code how to work on ccat 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 ccat configures →

View source ↗ nwiizo/ccat
Reuse

Borrowing it

Nothing to install: this file belongs to nwiizo/ccat. 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/nwiizo/ccat/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/nwiizo/ccat

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.

agentmods badge for ccat CLAUDE.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/nwiizo/ccat/claude-md"><img src="https://agentmods.dev/badge/instructions/nwiizo/ccat/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.

agentmods 80×15 button for ccat CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/nwiizo/ccat/claude-md"><img src="https://agentmods.dev/badge/instructions/nwiizo/ccat/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 823 This file is loaded in full into every session.
When invoked 823 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00823 $0.00823
Opus 5.5 $0.00329 $0.00329
Sonnet 5.5 $0.00165 $0.00165
Haiku 4.5 $0.00082 $0.00082

Measured 2mo ago against content hash bde113d9eb46, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ccat 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 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.

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 · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 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

This is ccat, a command-line tool for analyzing and managing Claude Code memory files (CLAUDE.md). It's built in Rust and provides comprehensive analysis, diagnostics, and export capabilities for CLAUDE.md files across different scopes (user, project, subdirectory).

Installation

From crates.io (Recommended)

cargo install ccat

From source

git clone https://github.com/nwiizo/ccat.git
cd ccat
cargo install --path .

Development Commands

Essential Commands

# Build and run quality checks (recommended before commits)
just check

# Auto-fix formatting and clippy issues
just fix

# Build release binary
just build

# Run tests
just test

# Install locally
just install

Development Workflow

# Format code
cargo fmt

# Run lints
cargo clippy --all-targets --all-features -- -D warnings

# Run specific tests
cargo test [test_name]

# Run benchmarks
cargo bench

# Generate and open documentation
cargo doc --open

Architecture Overview

The codebase is organized into five main modules:

Core Module (src/core/)

  • Scanner: Discovers CLAUDE.md files in filesystem hierarchy
  • Parser: Parses memory files and extracts imports/metadata
  • Resolver: Resolves import chains and validates references
  • Cache: LRU caching system for parsed files

CLI Module (src/cli/)

  • Commands: Eight main commands (show, diagnose, search, diff, watch, export, validate, init)
  • Args: Command-line argument definitions and parsing
  • Entry point that routes to appropriate command handlers

Analyzer Module (src/analyzer/)

  • Diagnostics: Detects issues like circular imports, missing files, large contexts
  • Security: Scans for exposed secrets, API keys, passwords
  • Validator: Validates memory file structure and content
  • Profiler: Performance metrics and analysis

Read the full file on GitHub · 122 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 · 122 lines · 823 tokens per session scan A bde113d9eb46

Subscribe to this mod's changes

ccat CLAUDE.md is an instructions file published in the GitHub repository nwiizo/ccat (34 stars, last pushed 3mo ago), licensed MIT. It adds 823 tokens to every session, about $0.0033 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.

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