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monoread: Instructions file for Claude Code

CLAUDE.md

monoread CLAUDE.md is an instructions file for Claude Code from yukukotani/monoread. It costs 505 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for monoread, a command-line tool and MCP server that extracts web pages into formats suited to AI systems.

In plain words
What is it for?
Use them when developing, testing, linting, or debugging monoread and its command-line or MCP interfaces.
Why use it?
They explain the project's layered structure, content-provider fallback order, development commands, and TypeScript coding rules.

Instructions file for Claude Code

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

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

not rated 11repo 11mo ago A scan 505 tokens original Apache-2.0
View source ↗ yukukotani/monoread
Reuse

Borrowing it

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

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 monoread CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/yukukotani/monoread/claude-md.svg)](https://agentmods.dev/instructions/yukukotani/monoread/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/yukukotani/monoread/claude-md"><img src="https://agentmods.dev/badge/instructions/yukukotani/monoread/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 505 This file is loaded in full into every session.
When invoked 505 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 $0.00505 $0.00505
Opus 5 $0.00253 $0.00253
Sonnet 5 $0.00101 $0.00101
Haiku 4.5 $0.00051 $0.00051

Measured 8d ago against content hash f0cf8d3bfc97, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

monoread 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 8d 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 · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 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

monoread is a CLI tool and MCP server for reading web page content in AI-optimized format. It provides high-quality content extraction using Mozilla Readability and llms.txt standards.

Development Commands

  • pnpm dev: Run in development mode
  • pnpm build: Build for production
  • pnpm test / pnpm test:watch / pnpm test:coverage: Run tests
  • pnpm lint: Run all linting (Biome + TypeScript)
  • pnpm fix: Fix linting issues automatically
  • pnpm mcp / pnpm mcp:debug: Run as MCP server

Architecture

Layered Architecture

  • Presentation Layer (src/presentation/): CLI (gunshi) and MCP server
  • Use Case Layer (src/usecase/): Business logic and content providers
  • Libs (src/libs/): Domain-independent utilities

Content Provider System

Multi-provider fallback system: GithubProvider → ReadabilityProvider → LlmsTxtProvider → HttpProvider. Each implements ContentProvider interface with canHandle() and extractContent() methods.

Development Rules

Core Principles

  • Language: TypeScript with strict type checking
  • Paradigm: Functional programming (functions over classes)
  • Error Handling: Tagged unions instead of throwing errors
  • Conversation: You MUST respond in Japanese
  • Comments: You MUST NOT keep descriptions of changes in code

Testing (TDD)

  • Follow t-wada's Test-Driven Development
  • Create failing tests first, then make them pass
  • Test files in same directory as source files (.test.ts extension)
  • Tech: vitest, power-assert-monorepo

Commit Workflow

  • Small, frequent commits per task
  • Run pnpm lint before each commit
  • Write commit messages in Japanese
  • Mark todos completed immediately after committing

Directory Structure

You MUST follow this structure and ask user before adding new directories under src/:

  • src/presentation/: CLI and MCP server implementations
  • src/usecase/: Business logic and providers
  • src/libs/: Domain-independent utilities

Read the full file on GitHub · 55 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. 8d ago First seen · 55 lines · 505 tokens per session scan A f0cf8d3bfc97

Subscribe to this mod's changes

monoread CLAUDE.md is an instructions file published in the GitHub repository yukukotani/monoread (11 stars, last pushed 11mo ago), licensed Apache-2.0. It adds 505 tokens to every session, about $0.0025 per session on Opus 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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