<2-3 sentences summarising what the project addresses and solves, the target audience, and the benefit.> This repository hosts "The Engineering Handbook," an open-source curriculum for High-Level System Design (HLD) and Data Structures & Algorithms (DSA). It targets software engineers, offering a structured, in-depth, and continuously updated learning resource as an alternative to fragmented online materials or paid courses, providing meticulously researched, modern, and practical guidance.

How It Works

The project delivers extensive educational content as plain Markdown files. Each chapter is a self-contained article explaining concepts from first principles with diagrams, examples, and primary source citations, avoiding external redirects for core learning. Content renders natively on GitHub and powers dedicated websites (handbook.academy) with enhanced features like search and interactive DSA visualizations, ensuring a consistent, high-quality, and accessible learning experience.

Quick Start & Requirements

Access the handbooks online via handbook.academy, hld.handbook.academy, or dsa.handbook.academy. For contributors running local validation checks, Node.js 20+ and npm are required. No specialized hardware is needed for reading.

Highlighted Details

• Vast Scope: HLD Handbook (~773k words, 159 chapters) covers topics from networking to LLM serving and post-quantum crypto. DSA Handbook (~470k words, 120 chapters) includes multi-language solutions for 155 LeetCode problems.
• Modern & Deep Content: Features cutting-edge AI/ML systems design, distributed systems theory, and modern algorithms, supported by over 3,100 citations (HLD). Includes a 22-page "Trade-offs Library" and 37 DSA "Pattern Decision Pages."
• Quality & Automation: Rigorous CI checks ensure Markdown linting, citation integrity, Mermaid diagram rendering, prose quality, and external link validity.
• Interactive DSA: The DSA website offers 46 interactive widgets for algorithm visualization.

Maintenance & Community

The project is solo-maintained by @invincible04. Contributions are welcomed via pull requests, with detailed guidelines in CONTRIBUTING.md. Community interaction occurs via GitHub Issues and Discussions. Active maintenance is evident through continuous updates and a robust CI pipeline.

Licensing & Compatibility

All content and scripts are licensed under CC BY-SA 4.0, permitting free use, adaptation, and commercialization with attribution and share-alike terms. The content itself cannot be paywalled.

Limitations & Caveats

Reliance on a single maintainer poses a bus factor risk. While comprehensive in HLD and DSA, coverage of other CS areas is planned but not yet implemented. Absolute beginners may require prior exposure to basic programming concepts.