LangChain Production Checklist

Overview

Comprehensive go-live checklist for deploying LangChain applications to production. Covers configuration, resilience, observability, performance, security, testing, deployment, and cost management.

1. Configuration & Secrets

• All API keys in secrets manager (not .env in production)
• Environment-specific configs (dev/staging/prod) validated with Zod
• Startup validation fails fast on missing config
• .env files in .gitignore

// Startup validation
import { z } from "zod";