Build a system, load it until it breaks, and watch why. A system design simulator for learning distributed systems.
Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.
Review code 100X faster. Lens draws every PR as animated architecture and data-flow walkthroughs, inside the pull request itself. Use it as a GitHub App, GitHub Action, CLI, or a Skill for your coding agent
Free, open-source diagram canvas. Draw it, write it as code (Mermaid, D2, Structurizr in), ask any AI model or a local one, let Claude Code edit it live over MCP, or map a GitHub repo with every arrow cited to a file and line. MIT, local-first, no account.
System design resources and examples for beginner to expert, Season 1. This is not an app. There is no root build, lint, or test command. Each video topic lives in its own folder.
The animated diagram editor AI agents can draw on. Animated technical diagrams (architecture, sequence, BPMN, cloud icons) built by you and your agent together on the same live canvas, via WebMCP. Open-source, local-first.
📚 A curated list of awesome articles, videos, and other resources to learn and practice software architecture, patterns, and principles.
系统性的 PHP 技术面试问答大全(面经)。涵盖 PHP8、MySQL、Redis、Nginx、系统设计、算法、Laravel 源码及高并发架构原理,助你斩获后端研发 Offer。PHP Interview Questions & Answers.
Whiteboard for practicing system design interviews with a live capacity model
A reading app for system design interviews: concept modules, technology pages and worked designs with interactive architecture diagrams.
Local-first, MCP-native tool for modelling software architecture. C4-style semantic model, React Flow editor, SQLite, single container — a self-hosted Structurizr alternative your AI client can edit over MCP.