langfuse-multi-env-setup

name	langfuse-multi-env-setup
description	Configure Langfuse across development, staging, and production environments. Use when setting up multi-environment deployments, configuring per-environment keys, or implementing environment-specific Langfuse configurations. Trigger with phrases like "langfuse environments", "langfuse staging", "langfuse dev prod", "langfuse environment setup", "langfuse config by env".
allowed-tools	Read, Write, Edit, Bash(aws:*), Bash(gcloud:*), Bash(vault:*)
version	1.12.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","langfuse","deployment"]
compatibility	Designed for Claude Code

Langfuse Multi-Environment Setup

Overview

Configure Langfuse across dev/staging/production with isolated API keys, environment-specific SDK settings, secret management, and CI/CD integration to prevent cross-environment data leakage.

Prerequisites

• Separate Langfuse API key pairs per environment (or separate projects)
• Secret management solution (env vars, Vault, AWS/GCP secrets)
• CI/CD pipeline with environment-aware deployment

Environment Strategy

Environment	API Key Source	Langfuse Project	Settings
Development	.env.local	Dev project	Debug on, flush immediately, 100% sampling
Staging	CI/CD secrets	Staging project	Prod-like settings, 50% sampling
Production	Secret manager	Prod project	Optimized batching, 10% sampling

Instructions

Step 1: Environment-Specific Configuration

// src/config/langfuse.ts
import { LangfuseSpanProcessor } from "@langfuse/otel";
import { NodeSDK } from "@opentelemetry/sdk-node";
import { LangfuseClient } from "@langfuse/client";

type Env = "development" | "staging" | "production";

interface LangfuseEnvConfig {
  exportIntervalMillis: number;
  maxExportBatchSize: number;
  debug: boolean;
  sampleRate: ;
}

 : <, > = {
  : {
    : ,
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  : {
    : ,
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 ():  {
   env = process.. || ;
   (env === )  ;
   (env ===  || process.. === )  ;
   ;
}

  () {
   env = ();
   config = [env];

  
   required = [, ];
   ( key  required) {
     (!process.[key]) {
        ();
    }
  }

  
   processor =  ({
    : config.,
    : config.,
  });

   sdk =  ({ : [processor] });
  sdk.();

  
   client =  ();

  .();

   { sdk, client, env, config };
}