LowLevelDesign.ai
v1.2.0 star

AI-assisted LLD &
machine coding harness.

Desktop app for object-oriented design practice. Clarify ambiguous requirements with an AI interviewer, code multi-file Python or Java with local test execution, and get evaluated across core software design dimensions.

↓ Download & setup
01 /

what it does

Workspace editor and test runner
tap to zoom

Multi-File Code & Local Test Terminal

Write modular classes in Python or Java. Built-in code completion and instant local test execution with zero cloud latency.

3 / 4
02 /

install & setup

Download

Desktop installer for your operating system.

.dmg (Universal / Apple Silicon) .AppImage .exe (Setup & Portable)

Finding latest release...

Or run from source 
git clone https://github.com/ccd97/LowLevelDesign.ai.git
cd LowLevelDesign.ai
npm install
npm run dev

Setup

Quick steps to configure API and start mock sessions.

  1. Get API keys — OpenRouter (judge, questions, chat). Free tier available.
  2. Paste in Settings, gear icon in the top bar
  3. Generate a problem, clarify scope, code multi-file Python or Java
  4. Run local tests, get scored by the AI judge

→ Key setup guide