lg-cheatsheet

Generate concise LangGraph and LangChain v1 reference skims with YAML frontmatter.

4|Updated Apr 15, 2026

Search Tags:#typescript #javascript #langchain #reference #langgraph #best-practices

Ready to run

npx skills add https://github.com/markhazlett/agent-harness --skill lg-cheatsheet

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: lg-cheatsheet
Source: https://github.com/markhazlett/agent-harness/tree/main/.claude/skills/lg-cheatsheet
Command: npx skills add https://github.com/markhazlett/agent-harness --skill lg-cheatsheet

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides a concise, authoritative LangGraph/LangChain reference to accelerate learning, troubleshooting, and correct usage.

Core Features & Use Cases

Quick mental model and surface-level API overview for LangGraph and LangChain v1
Debunking common footguns, deprecated patterns, and JS/TS specifics
Production-oriented checklist and reference material for reviewers and engineers

Quick Start

Ask for LangGraph best practices and LangChain v1 guidance to get a concise reference tailored to your scenario.

Frequently Asked Questions about lg-cheatsheet

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

What are common LangGraph footguns and deprecated patterns to avoid?▼

This LangGraph reference identifies deprecated patterns and JS/TS-specific footguns to avoid. It provides a concise overview of common pitfalls, ensuring developers use the correct v1-current API and avoid problematic implementations.

How do I get a quick mental model for LangGraph and LangChain v1?▼

You can get a quick LangGraph mental model by using this reference for a surface-level API overview of LangChain v1. It establishes core architectural concepts to accelerate learning and correct implementation.

Is there a production checklist for deploying LangGraph applications?▼

Yes, this LangGraph reference provides a production-oriented checklist for engineers and reviewers. It offers guidance to verify correct API usage, avoid deprecated patterns, and ensure deployment readiness in LangGraph contexts.

Does this LangChain reference cover JavaScript and TypeScript specifics?▼

Yes, this LangChain reference explicitly covers JavaScript and TypeScript specifics. It addresses JS/TS-specific footguns and deprecated patterns to help developers implement correct best practices in their applications.

What is the best way to troubleshoot LangChain v1 API issues?▼

The best way to troubleshoot LangChain v1 issues is using this concise reference to verify the v1-current API. It highlights deprecated patterns and mental models to quickly identify and resolve incorrect implementations.

When do I need a LangGraph quick reference?▼

You need a LangGraph quick reference when seeking concise guidance on mental models, v1-current APIs, or production checklists. It is designed for developers needing fast troubleshooting and correct usage verification.