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My-Distributed-Bookstore: Instructions file for Claude Code

CLAUDE.md

My-Distributed-Bookstore CLAUDE.md is an instructions file for Claude Code from Youngermaster/My-Distributed-Bookstore. It costs 22,546 tokens per session, scanned C, original, Apache-2.0.

A project overview for a distributed bookstore built from microservices, which are small services that work together over a network. It describes the cloud deployment, languages, databases, messaging, authentication, and web frontend.

In plain words
What is it for?
Use it when developing or reviewing bookstore services, APIs, event-driven workflows, authentication, data storage, deployment, or the React frontend.
Why use it?
It gives coding agents the system boundaries and technology choices needed to make compatible changes across the bookstore’s services.

Instructions file for Claude Code

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

This is Youngermaster/My-Distributed-Bookstore's own configuration. It tells Claude Code how to work on My-Distributed-Bookstore 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 My-Distributed-Bookstore configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import { useAuthStore } from '../store/authStore';.

not rated 2repo 1y ago C scan 22,546 tokens original Apache-2.0
View source ↗ Youngermaster/My-Distributed-Bookstore
Reuse

Borrowing it

Nothing to install: this file belongs to Youngermaster/My-Distributed-Bookstore. 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/Youngermaster/My-Distributed-Bookstore/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Youngermaster/My-Distributed-Bookstore

Made for: Claude Code.

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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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Per session 22,546 This file is loaded in full into every session.
When invoked 22,546 The same file — it is already loaded in full.
Security scan C 2 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 $0.22546 $0.22546
Opus 5.5 $0.09018 $0.09018
Sonnet 5.5 $0.04509 $0.04509
Haiku 4.5 $0.02255 $0.02255

Measured 2mo ago against content hash bda0614f9e66, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

My-Distributed-Bookstore CLAUDE.md scanned grade C with 2 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf */bin */dist

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

CMD wget --no-verbose --tries=1 --spider http://localhost:8081/health || exit 1
CLAUDE.md · 3,324 lines

How it starts

The opening of the file, as written. The whole thing — 3,324 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

A production-ready distributed bookstore system built with microservices architecture on AWS EKS, following industry best practices and principles from "Distributed Systems" by Tanenbaum & van Steen. This project demonstrates real-world implementation of distributed systems concepts including event-driven architecture, saga patterns, gRPC communication, and comprehensive observability.

Tech Stack

Backend Microservices (Polyglot Architecture):

  • Go 1.21+: Primary language for high-performance services
    • Fiber (web framework)
    • GORM (ORM)
    • gRPC with Protocol Buffers
  • Node.js/TypeScript: For I/O-bound services
    • Express.js
    • Payment gateway integrations
    • WebSocket support
  • Python 3.11+: For ML/AI services
    • FastAPI
    • scikit-learn (recommendations)
    • NLTK (sentiment analysis)
  • JWT: Authentication & authorization
  • PostgreSQL 15: Primary relational database
  • Redis 7: Caching, sessions, rate limiting
  • RabbitMQ 3.12: Message broker for async communication

Frontend:

  • TypeScript + React 18+
  • shadcn/ui component library
  • TanStack Query v5 (data fetching)
  • Zustand (state management)
  • React Router v6
  • Tailwind CSS

Infrastructure:

  • Docker & Docker Compose (local development)
  • Kubernetes 1.28+ (AWS EKS)
  • Nginx Ingress Controller
  • PostgreSQL (per-service databases)
  • Redis (shared cache cluster)
  • RabbitMQ (StatefulSet cluster)
  • S3 (static assets, book covers)
  • CloudFront (CDN)
  • Route53 (DNS)
  • ACM (SSL certificates)

Observability:

  • Jaeger (distributed tracing)
  • Prometheus (metrics collection)
  • Grafana (visualization dashboards)
  • ELK Stack (centralized logging)
    • Fluentd (log shipping)
    • Elasticsearch (log storage)
    • Kibana (log analysis)

Architecture Principles

Microservices Design

  • Database per Service: Each microservice owns its data
  • API Gateway Pattern: Single entry point for clients
  • Service Discovery: Kubernetes DNS
  • Event-Driven Architecture: Asynchronous communication via RabbitMQ
  • Saga Pattern: Distributed transactions without 2PC
  • CQRS: Separate read/write models for complex queries
  • Circuit Breaker: Fault tolerance with automatic recovery
  • Health Checks: Liveness and readiness probes

Read the full file on GitHub · 3,324 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 · 3,324 lines · 22,546 tokens per session scan C bda0614f9e66

Subscribe to this mod's changes

My-Distributed-Bookstore CLAUDE.md is an instructions file published in the GitHub repository Youngermaster/My-Distributed-Bookstore (2 stars, last pushed 1y ago), licensed Apache-2.0. It adds 22,546 tokens to every session, about $0.0902 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

distributed-systemsgo-microservicekubernetes
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