Understand your codebase.
Contribute from day zero.
A personalized onboarding kit that reads your GitHub repo, understands your role, and gives you everything you need to start contributing in minutes, not weeks.
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Architecture Diagram
High-level view of this codebase and how the pieces fit together.
Web App
(Next.js)
API Routes
(app/api)
Auth
(NextAuth.js)
Database
(PostgreSQL)
External APIs
(Stripe, etc.)
File Storage
(S3)
Where does authentication happen?
10:24 AM
Bob 10:25 AM
Authentication is handled by NextAuth.js in app/api/auth/[...nextauth].ts. This file configures the auth providers and handles the session strategy.
Ask anything about this codebase...
How it works
From repo URL to contributing - in three steps
Paste a GitHub URL
Drop in any public repository URL. Day Zero fetches the structure, key files, and architecture so you don't have to read through everything yourself.
Pick your role and level
Tell us whether you're Frontend, Backend, Full Stack, or DevOps and whether you're Junior, Mid, or Senior. Your kit is built around you, not a generic developer.
Get your personalized kit
Receive an architecture overview, a first-hour setup guide, hidden gotchas, a suggested first task, and a live chat - all grounded in the actual codebase.
Examples
Try it on a real codebase
Click any repo below to instantly generate a kit - no GitHub URL needed.