C
Minimal knowledge for vibe coding

AI writes the code.
CS fundamentals make it work.

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From one goal of yours
AI 1:1 tutoring

Pick what you want to build, then master it 1:1 by writing it yourself and understanding the why — a taste is free, the full course is Pro.

  • Goal-based custom plan (basics · tools · steps)
  • 1:1 back-and-forth tutoring (type it yourself, piece by piece)
  • Linked to concept notes (free) — check instantly when you get stuck
  • Taste it free · full 1:1 interactive is Pro
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Pricing

All 347 pieces of content are free. Unlimited AI 1:1 tutoring is Pro.

Free
₩0Free forever
  • 347 concept notes — all free to read (no login)
  • AI 1:1 coach — 5 turns/day trial
  • Save progress & bookmarks
  • No ads
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Pro
₩9,900/ month
  • Unlimited interactive lessons — learn by writing code yourself
  • Full interactive "Try it yourself" in concept notes
  • Unlimited AI 1:1 coach + premium model (Claude)
  • Everything in Free included

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AI content automation pipeline

From a single topic — draft to publish, AI does it automatically

01
AI draft
Give a topic, it writes
02
Legal review
Risk & terms check
03
Translate
KO·EN·JA localization
04
Publish
Auto-publish after review
Concept → Practice → Verify: skill builds in 3 steps

Learning flow

STEP 01

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Social sign-up in 30 sec (Kakao · Naver · Google)

STEP 02

Choose a category

Choose freely from 15 tracks

STEP 03

Study · Bookmark

Track progress by lesson

STEP 04

AI 1:1 tutoring

Custom course per goal

From Java basics to AI applications — all free

Java
6 lessons
Spring Boot
10 lessons
Database
6 lessons
HTML/CSS
11 lessons
JavaScript
21 lessons
TypeScript
7 lessons
React
22 lessons
Next.js
15 lessons
Python
27 lessons
Vibe Coding
9 lessons
Dev Tools
4 lessons
Network
9 lessons
OS
5 lessons
Security
4 lessons
DevOps
4 lessons
Collaboration & Git
4 lessons

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CodeMaster | CS fundamentals for vibe coding — AI writes the code, CS makes it work