# leetcode-teacher

Generates interactive coding playgrounds with real product scenarios from companies like Uber and Slack. Teaches 20 algorithmic patterns in four languages.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 592 installs · ★ 221
- Author: jamesrochabrun
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/jamesrochabrun/skills/tree/HEAD/skills/leetcode-teacher/SKILL.md
- Updated: 2026-01-14
- HTML: https://affpapa.org/en/nevibecode/skills/leetcode-teacher

## What it does

This skill turns technical interview preparation into practical exercises. Instead of generic LeetCode puzzles, it frames problems around realistic product workflows: tracking unread messages in Slack, calculating Uber fares, or ranking Instagram likes. Difficulty scales from Easy to Expert.

Learning centers on 20 core algorithmic patterns. It covers two pointers, sliding windows, tree and graph traversals, topological sort, dynamic programming, and tries. You write code in browser-based playgrounds, run instant tests, and receive guided hints whenever an approach fails.

Language support is strictly limited to Python, TypeScript, Kotlin, and Swift. If your target interview requires C++ or Go, you will need to adapt the generated code templates manually.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add jamesrochabrun/skills --skill leetcode-teacher -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/leetcode-teacher/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/leetcode-teacher/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add jamesrochabrun/skills --skill leetcode-teacher -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/leetcode-teacher/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add jamesrochabrun/skills --skill leetcode-teacher -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/leetcode-teacher/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install jamesrochabrun/skills leetcode-teacher
```

2. **Manually: put the files in place**
- File: `.github/skills/leetcode-teacher/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add jamesrochabrun/skills --skill leetcode-teacher -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/jamesrochabrun/skills --path skills/leetcode-teacher
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/leetcode-teacher/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add jamesrochabrun/skills --skill leetcode-teacher -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/jamesrochabrun/skills/tree/HEAD/skills/leetcode-teacher/SKILL.md

## When to use it
- master 20 essential coding patterns for technical interviews
- practice algorithms through real scenarios from Uber, Slack, and Instagram
- solve problems in Python, TypeScript, Kotlin, or Swift
- run test suites in browser-based code playgrounds with instant feedback

## Example prompts
- Give me an Easy Two Pointers challenge in Python based on the Instagram like scenario
- Teach me the Sliding Window pattern in TypeScript with instant test cases
- Give me a hint for optimizing this graph traversal problem

## Source text · SKILL.md · MIT

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BEGIN THIRD-PARTY FILE 5264fbd3df94ea11
````text
---
name: leetcode-teacher
description: Interactive LeetCode-style teacher for technical interview preparation. Generates coding playgrounds with real product challenges, teaches patterns and techniques, supports Python/TypeScript/Kotlin/Swift, and provides progressive difficulty training for data structures and algorithms.
---

# LeetCode Teacher

An interactive technical interview preparation teacher that generates engaging coding playgrounds with real-world product challenges, pattern recognition training, and multi-language support.

## What This Skill Does

Transforms technical interview prep into interactive, practical experiences:
- **Interactive Code Playgrounds** - Browser-based coding environments with instant feedback
- **Multi-Language Support** - Python, TypeScript, Kotlin, Swift
- **Real Product Challenges** - Practical scenarios from real companies
- **Pattern Recognition** - Learn the 20 essential coding patterns
- **Progressive Difficulty** - Easy → Medium → Hard → Expert
- **Instant Feedback** - Run tests in real-time with detailed explanations
- **Technique Teaching** - Master problem-solving approaches

## Why This Skill Matters

**Traditional LeetCode practice:**
- Abstract, disconnected problems
- No pattern recognition guidance
- Trial and error approach
- Intimidating for beginners
- Limited language options

**With this skill:**
- Real product scenarios
- Pattern-based learning
- Guided problem-solving
- Progressive difficulty curve
- Multi-language practice
- Interactive, fun interface

## Core Principles

### 1. Pattern-First Learning
- Recognize problem patterns
- Apply proven templates
- Build intuition through practice
- Master one pattern at a time

### 2. Real Product Context
- Instagram feed ranking
- Uber trip matching
- Netflix recommendation
- Slack message search
- Amazon inventory management

### 3. Progressive Difficulty
- Start with fundamentals
- Build complexity gradually
- Unlock advanced patterns
- Track skill progression

### 4. Multi-Language Mastery
- Practice in your target language
- Compare implementations
- Learn language-specific tricks
- Interview in any language

### 5. Interactive Learning
- Write code in browser
- Run tests instantly
- Get hints when stuck
- See optimal solutions
- Track progress

## Problem Patterns Covered

### Array & String Patterns

**1. Two Pointers**
```
Pattern: Use two pointers to scan array
Use when: Need to find pairs, triplets, or subarrays
Example: "Find Instagram users who like each other"
Complexity: O(n) time, O(1) space
```

**2. Sliding Window**
```
Pattern: Maintain a window that slides through array
Use when: Need to find subarray with certain property
Example: "Find trending topics in last N tweets"
Complexity: O(n) time, O(k) space
```

**3. Fast & Slow Pointers**
```
Pattern: Two pointers moving at different speeds
Use when: Detect cycles, find middle element
````
END THIRD-PARTY FILE 5264fbd3df94ea11

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