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code-health: Instructions file for Claude Code

CLAUDE.md

code-health CLAUDE.md is an instructions file for Claude Code from CodingButter/code-health. It costs 1,325 tokens per session, scanned A, original, MIT.

Repository instructions for Code Health, a Node.js command-line tool that analyzes JavaScript and TypeScript projects. It reports issues such as complex code, dependency cycles, unused code, and oversized files through a web dashboard.

In plain words
What is it for?
They are for working on the command-line commands, analysis runners, dashboard server, WebSocket updates, and React interface.
Why use it?
They explain the project structure and expected implementation patterns, making it easier to extend the analyzer consistently.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is CodingButter/code-health's own configuration. It tells Claude Code how to work on code-health 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 code-health configures →

not rated 3repo 1y ago A scan 1,325 tokens original MIT
View source ↗ CodingButter/code-health
Reuse

Borrowing it

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

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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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
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Per session 1,325 This file is loaded in full into every session.
When invoked 1,325 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 $0.01325 $0.01325
Opus 5.5 $0.00530 $0.00530
Sonnet 5.5 $0.00265 $0.00265
Haiku 4.5 $0.00133 $0.00133

Measured 2mo ago against content hash e6ce8865ba62, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-health 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 · 152 lines

How it starts

The opening of the file, as written. The whole thing — 152 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 repository will contain @butter/code-health, a global Node.js CLI tool for analyzing code health in TypeScript/JavaScript projects. The tool provides static analysis, dependency visualization, and code quality metrics through a browser-based dashboard.

Architecture

Core Components

  1. CLI Entry Point (src/index.ts)

    • Commands: analyze, dashboard, print
    • Uses commander or sade for CLI parsing
    • Global installation via npm i -g or runnable with npx

  2. Analysis Runners (src/core/runners/)

    • ESLint runner with TypeScript, SonarJS, Unicorn, and Regexp plugins
    • Dependency-cruiser for dependency graph analysis
    • Knip for dead code detection
    • Cloc for line counting

  3. Dashboard Server (src/server/)

    • Fastify-based API server
    • WebSocket support for live updates
    • Serves Vite-built React UI from dist/ui

  4. React UI (ui/)

    • Vite + React single-page application
    • Tables for: largest files, complexity metrics, dependency cycles, dead code, max-lines violations
    • Auto-refresh via WebSocket in watch mode

Key Implementation Patterns

  • Zero repo churn: All reports written to temp directories (~/.butter-code-health/<hash>/.reports/ or OS temp)
  • Monorepo-aware: Detects workspaces via package.json, pnpm-workspace.yaml
  • Config resolution: Respects existing ESLint/TypeScript configs, falls back to internal defaults
  • Unified ignore strategy: Combines .gitignore with built-in patterns (node_modules, dist, build, etc.)

Development Commands

# Initial setup (once codebase exists)
pnpm install

# Build the CLI and UI
pnpm build        # Build both CLI (to dist/cli.cjs) and UI (to dist/ui)
pnpm build:cli    # Build CLI only
pnpm build:ui     # Build UI only

# Development
pnpm dev          # Run CLI in watch mode
pnpm dev:ui       # Run Vite dev server for UI

# Testing
pnpm test         # Run tests
pnpm test:watch   # Run tests in watch mode

# Linting & Type Checking
pnpm lint         # Run ESLint
pnpm typecheck    # Run TypeScript type checking

# Local testing of the CLI
pnpm link         # Link package globally for testing
npx @butter/code-health analyze    # Test analyze command
npx @butter/code-health dashboard  # Test dashboard command

Read the full file on GitHub · 152 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 · 152 lines · 1,325 tokens per session scan A e6ce8865ba62

Subscribe to this mod's changes

code-health CLAUDE.md is an instructions file published in the GitHub repository CodingButter/code-health (3 stars, last pushed 1y ago), licensed MIT. It adds 1,325 tokens to every session, about $0.0053 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 2026-08-31.

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