n8n-to-langgraph

A Claude Code marketplace plugin that converts n8n workflows to LangGraph TypeScript applications.

What it does

This plugin provides a structured pipeline for converting n8n workflow JSON files into fully functional LangGraph applications with Langfuse observability built in by default. It handles the full lifecycle: analysis, architecture planning, implementation guidance, and post-implementation review.

Every converted application includes a Langfuse helper module that traces all LLM calls, tool invocations, and graph executions — giving you a dashboard with latency, token usage, costs, and session replay. The integration is opt-in via environment variables: zero overhead when keys are not set.

Architecture

3 specialized subagents + 1 orchestrator skill:

/n8n-to-langgraph 
│
├─► workflow-analyzer (×2-3 in parallel)
│   Parses n8n JSON, extracts system prompts verbatim,
│   traces execution paths, maps integrations & credentials
│
├─► conversion-architect
│   Designs LangGraph StateGraph topology, state schemas,
│   tool specs, test plan, and phased implementation order
│
└─► conversion-reviewer (review mode)
    Compares implementation against originals for fidelity,
    test coverage, and code quality

Each agent has domain-specific skills preloaded via frontmatter — they don’t inherit from the parent conversation. This guarantees the right knowledge is available regardless of how the agent is invoked.

Plugin structure

.claude-plugin/
├── plugin.json              # Plugin metadata
└── marketplace.json         # Marketplace registration
agents/
├── workflow-analyzer.md     # n8n workflow analysis agent
├── conversion-architect.md  # LangGraph architecture design agent
└── conversion-reviewer.md   # Post-implementation review agent
skills/
└── n8n-to-langgraph/
    └── SKILL.md             # Orchestrator skill + domain knowledge

Installation

In Claude Code, run:

/plugin marketplace add fazer-ai/n8n-to-langgraph
/plugin install n8n-to-langgraph@n8n-to-langgraph

See the plugin marketplaces docs for more details.

Manual installation

Alternatively, add to your ~/.claude/settings.json:

{
  "enabledPlugins": {
    "n8n-to-langgraph@n8n-to-langgraph": true
  },
  "extraKnownMarketplaces": {
    "n8n-to-langgraph": {
      "source": {
        "source": "git",
        "url": "https://github.com/fazer-ai/n8n-to-langgraph.git"
      }
    }
  }
}

Then restart Claude Code.

Usage

Convert workflows

/n8n-to-langgraph workflows/

This runs two phases:

1. Analysis — Parallel agents parse your n8n workflow JSONs, extract every system prompt verbatim, trace execution paths, and identify all integrations and credentials needed.