Codebase 101Free for public repos

It makes you understand how your codebase is built — after you build it.

Paste a public repo. Codebase 101 reads your code and gives you a short guided tour of what you actually have — and tells you what to learn next. It teaches; you absorb. (It’s not a chatbot — that’s what Claude Code is for.)

Your public repo

We never write to your code — read-only. Public repos need no sign-in. About 6 minutes, 8 short steps.

A peek at the tour Codebase 101 builds for a repo like yours

STEP 1

The map of your repo

/ (the root)

STEP 3

How it knows it's you

lib/supabase/auth.ts

STEP 5

The part that runs without you

supabase/functions/water-reminders

STEP 8

Keeping it alive in production

.env · vercel.json

Whose world this is: Maya taught herself to build with AI and shipped PlantPal — a plant-care reminder app with 40 real users. It works; she just doesn’t yet understand how. Codebase 101 fixes that. Maya and PlantPal are an illustrative example; the tour, files, and code peeks shown here are a realistic worked example of a small Next.js + Supabase app. This is an early build — the tour-generation engine that reads a real repo is not wired yet, so every tour here is the worked example (no repo is read, nothing is written).