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LangChain Execution Engine

The LangChain execution engine has moved to the Ark Marketplace .

Installation

Install from the marketplace:

ark marketplace install executor-langchain

Or deploy with DevSpace as a dependency:

dependencies:
  executor-langchain:
    git: https://github.com/mckinsey/agents-at-scale-marketplace
    subPath: services/executor-langchain

Features

  • A2A protocol for engine communication
  • LangChain framework integration
  • Optional RAG (Retrieval-Augmented Generation) support via agent labels
  • Compatible with all Model providers (Azure OpenAI, OpenAI)

ExecutionEngine Resource

The LangChain executor registers as an ExecutionEngine with A2A protocol:

apiVersion: ark.mckinsey.com/v1prealpha1
kind: ExecutionEngine
metadata:
  name: executor-langchain
spec:
  address:
    valueFrom:
      serviceRef:
        name: executor-langchain
        port: "8000"
  description: "LangChain Executor - A2A server with RAG support"

RAG Support

Enable RAG for an agent by adding the label:

apiVersion: ark.mckinsey.com/v1alpha1
kind: Agent
metadata:
  name: my-agent
  labels:
    langchain: rag
spec:
  executionEngine:
    name: executor-langchain
  prompt: |
    You are an expert Python developer assistant with deep knowledge of the codebase.

Next Steps

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