The Problem

Engineers preparing for system‑design interviews need concise, well‑structured reference material that covers the breadth of topics in System Design Interview – An Insider’s Guide. Without a single, curated source, candidates waste time piecing together scattered notes, diagrams, and example architectures.

What This Does

The repository is a curated collection of markdown notes and supporting diagrams that walk through each chapter of the book.

  • Core content lives in directories such as 01. Scaling/Readme.md, 04. Rate Limiter/Readme.md, and 19. Distributed Message Queue/README.md.
  • Each chapter folder contains a Readme.md that outlines the design problem, key trade‑offs, and a high‑level solution, while the sibling images/ sub‑folder holds the visual assets referenced in the text (e.g., 04. Rate Limiter/images/token-bucket.png).

Because the repo contains only documentation (29 markdown files, 222 images) and a single test file, there is no executable code, build scripts, or runtime dependencies.

How It Is Wired

The repository does not expose an entry point or call graph; its purpose is static reference. The only “execution” path is the human reader opening a markdown file (e.g., cat 06. Key-Value Store/Readme.md).

  • No source files import one another, and no functions are defined.
  • The solitary test (test/notes_test.py – inferred from the “1 test file” count) likely validates the presence or formatting of markdown files, but it does not drive any functional behavior.

Consequently, there is no wiring to external services, databases, or networks. The impact surface is limited to the repository’s file system: editing a markdown file or replacing an image directly changes the delivered content.

How To Use It

# Clone the repository
git clone https://github.com/moses-y/system-design-notes.git
cd system-design-notes

# Browse a chapter (example: Rate Limiter)
open "04. Rate Limiter/Readme.md"   # macOS
# or
xdg-open "04. Rate Limiter/Readme.md"   # Linux

No additional setup, package manager, or Docker image is required because the repo contains no code to compile or run. If you wish to render the markdown with images locally, any markdown viewer (VS Code, Typora, etc.) will suffice.

Real‑World Use

A candidate can clone the repo on a laptop before an interview, open 12. Chat System/Readme.md, and use the embedded diagrams (high-level-design.png, heartbeat-mechanism.png) to rehearse the architecture discussion. The same approach works for interviewers who need a quick visual aid while evaluating a design.

Code Health & Issues

  • Medium – No CI pipeline – repository root (no .github/ or other CI config).
  • Medium – No LICENSE file – repository root, leaving usage rights unclear.
  • Low – Tests present – one test file detected, but no automated build steps.
  • Low – No Dockerfile or lockfile – indicates no runtime dependencies to manage.

No secrets or credential leaks were found.

The Bottom Line

The repo is a well‑organized, image‑rich set of study notes for system‑design interview preparation, but it provides no executable code or automation. It is valuable for individuals or teams needing a quick, offline reference, yet it lacks CI, licensing, and any runnable artifacts that would support integration into a larger tooling chain.