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markhazlett
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lg-review

Audits LangGraph/LangChain codebases for v0-to-v1 migration issues and deprecated patterns.

4|Updated Apr 15, 2026
Search Tags:#audit#migration#deprecation#langgraph#upgrade#code-review
One-click install
npx skills add https://github.com/markhazlett/agent-harness --skill lg-review
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: lg-review
Source: https://github.com/markhazlett/agent-harness/tree/main/.claude/skills/lg-review
Command: npx skills add https://github.com/markhazlett/agent-harness --skill lg-review

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Static, actionable guidance to migrate LangGraph v0 code to v1 and remove deprecated patterns, reducing upgrade risk and runtime issues.

Core Features & Use Cases

  • Static audit of code for deprecations and compatibility gaps.
  • Generates a structured punch-list with BLOCKING, WARNING, and NIT findings.
  • Produces migration plans and step-by-step guidance for safe upgrades in production.

Quick Start

Run /lg-review <path> to start an audit against a target file or directory.

Frequently Asked Questions about lg-review

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

FAQPage Schema
How do I audit my LangGraph codebase for v1 migration issues?▼

To audit LangGraph code for v1 migration issues, run a static analysis pipeline that scans for deprecated patterns and compatibility gaps, generating a structured punch-list of findings to guide your upgrade safely.

What is the best way to upgrade LangGraph agents from v0 to v1 safely?▼

The best way to upgrade LangGraph agents safely is to apply a static audit that identifies deprecations and correctness issues, producing a step-by-step migration plan with blocking and warning findings before you modify production code.

How does a LangGraph code audit identify deprecated patterns?▼

A LangGraph code audit identifies deprecated patterns by applying a grep-based pipeline across your codebase to surface v0 compatibility gaps, categorizing issues into blocking, warning, and style findings for actionable remediation.

Can I use a static audit to check LangChain chains for v1 compatibility?▼

Yes, you can use a static audit to check LangChain chains and prebuilt patterns for v1 compatibility by evaluating the codebase against a migration cheatsheet to surface deprecations and generate actionable upgrade guidance.

What do I need to migrate LangGraph code to v1 without runtime issues?▼

To migrate LangGraph code to v1 without runtime issues, you need a cheatsheet context and a structured punch-list workflow that surfaces correctness and production findings, ensuring deprecated patterns are removed before deployment.

Why does my LangGraph upgrade fail with deprecated v0 patterns?▼

LangGraph upgrades fail with deprecated v0 patterns because v1 introduces compatibility gaps and syntax changes that require a static code audit to detect, classify, and fix blocking issues before executing the migration.

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