LitCode 🔥
The modern, local-first LeetCode companion for VS Code
A VS Code extension designed for frictionless, local-first algorithmic problem solving, curated curriculum tracking (Striver's SDE Sheet, NeetCode 150, Blind 75), multi-language offline test validation, and Socratic hints.
✨ Key Features
- 🚀 Guest-First (Zero Setup Required):
- Browse problems, daily challenges, and curated study plans immediately upon installation with zero authentication or login required.
- Activity Bar Side Panel:
- 🔥 Daily Coding Challenge: Auto-fetches the active problem of the day with direct one-click workspace setup.
- 📚 Curated Study Plans: Built-in support for Striver's SDE Sheet, NeetCode 150, and Blind 75 with real-time completion tracking.
- ➕ Custom Study Plans: Create, import, export, and manage your own custom problem sheets.
- ⭐ Bookmarks & Solved Tracking: Star favorite problems and mark completed problems with offline persistence.
- 🔍 Problem Search: Search 3,000+ LeetCode problems directly from VS Code via QuickPick (
Ctrl+Shift+P -> LeetCode: Search Problems).
- 🖥️ Companion Problem Webview:
- Automatically opens beside your code editor (
ViewColumn.Beside).
- Displays difficulty badges, problem topics/tags, clean markdown statements, interactive examples, constraints, and hints.
- ⚡ Local Multi-Language Test Runner:
- Run your code against sample and custom test cases right on your computer without sending requests to LeetCode.
- Instant offline feedback, pass/fail status, runtime in milliseconds, and expected vs. actual outputs.
- Supported Languages: Python 3, JavaScript (Node.js), TypeScript, C++ (g++), and Java.
- ⏱️ Mock Interview Timer & Strict Mode:
- Practice under real interview conditions with a countdown timer (default 45 min) in the status bar.
- Strict mode alerts you if you leave the editor or switch windows during the session.
- 🧠 Spaced Repetition System (SRS):
- Automatically schedules problem reviews based on SM-2 spaced repetition algorithms to ensure long-term retention.
- 🤖 Socratic AI Coach (BYOK & Copilot):
- Get progressive, Socratic hints without spoiling the entire solution.
- Zero-cost out of the box using VS Code's Language Model API (GitHub Copilot), or Bring-Your-Own-Key (BYOK) for OpenAI, Gemini, Claude, or local Ollama.
- ☁️ Remote Submission (Optional):
- Connect your LeetCode session cookies securely using VS Code
SecretStorage to submit directly to LeetCode and keep your streak alive.
🛠️ Configuration Settings
Configure these in VS Code Settings (Ctrl+, -> Search LitCode):
| Setting |
Default |
Description |
leetcode.defaultLanguage |
"python3" |
Default language for solutions (python3, javascript, typescript, cpp, java). |
leetcode.solutionsDirectory |
"" |
Directory path where solutions are saved. Defaults to ~/.leetcode/solutions. |
leetcode.autoOpenCompanionWebview |
true |
Automatically open the companion problem viewer beside your solution editor. |
leetcode.endpoint |
"https://leetcode.com" |
LeetCode endpoint (https://leetcode.com or https://leetcode.cn). |
leetcode.ai.apiKey |
"" |
Custom API Key for AI Coach (BYOK). Leave empty to use VS Code Language Model API. |
leetcode.ai.endpoint |
"https://api.openai.com/v1/chat/completions" |
Custom AI API endpoint (OpenAI, Ollama, etc.). |
leetcode.ai.model |
"gpt-4o-mini" |
Model identifier for custom AI provider. |
⌨️ Commands
| Command |
Title |
leetcode.openDailyChallenge |
Open Today's Daily Challenge |
leetcode.searchProblem |
Search LeetCode Problems |
leetcode.refreshExplorer |
Refresh Explorer View |
leetcode.runLocalTests |
Run Local Tests (Python / JS / TS / C++ / Java) |
leetcode.submitSolution |
Submit Solution to LeetCode |
leetcode.startInterviewTimer |
Start Mock Interview Timer |
leetcode.toggleStrictMode |
Toggle Strict Mock Interview Mode |
leetcode.changeLanguage |
Change Preferred Language |
leetcode.signIn |
Sign In with LeetCode Cookies |
leetcode.signOut |
Sign Out |
📦 Publishing
VS Code Marketplace
- Get a Personal Access Token (PAT) from Azure DevOps with Marketplace (Manage) scope.
- Publish with:
npx vsce publish -p <YOUR_VS_CODE_PAT>
Open VSX
- Get an Access Token from Open VSX Registry.
- Publish with:
npx ovsx publish -p <YOUR_OPEN_VSX_TOKEN>
📄 License
This extension is licensed under the MIT License.
| |
