Does this skill help with backend testing?

Yes, it provides specific strategies and directory structures for unit and integration testing using Jest for web packages and Vitest for worker packages.

Where should I place business logic according to these guidelines?

Business logic should always be encapsulated in service files within the feature directory, rather than being placed directly in tRPC procedures or queue processors.

How does it handle multi-tenant data isolation?

It enforces strict isolation patterns using projectId filtering across all database operations to ensure users only access resources they are entitled to.

How is environment configuration managed?

The skill mandates the use of an env.mjs configuration pattern to provide type-safe access to environment variables, prohibiting direct process.env calls in business logic.

What technology stack does this skill support?

This skill is specifically optimized for Next.js 14, tRPC, Express, TypeScript, Prisma (PostgreSQL), ClickHouse, and BullMQ within a monorepo structure.

Langfuse Backend Development Guide

Name: Langfuse Backend Development Guide
Author: Activer007

byActiver007

API Development

Streamlines backend development for Langfuse monorepos using Next.js 14, tRPC, and layered architecture patterns.

About

This skill provides comprehensive guidelines and best practices for developing robust backend features within the Langfuse ecosystem. It enforces a standardized layered architecture where tRPC procedures and queue processors delegate logic to dedicated services, ensuring maintainability and clean code. Designed for complex monorepos, it covers everything from multi-tenant isolation using PostgreSQL and ClickHouse to background job processing with BullMQ and high-fidelity observability via OpenTelemetry. Whether building public APIs or internal services, this skill ensures consistency across the entire backend stack.

Key Features

Standardized layered architecture enforcement (Procedures/Queues -> Services -> DB)
Automated checklists for tRPC features, public REST APIs, and BullMQ processors
Dual-database integration strategies for PostgreSQL (Prisma) and ClickHouse
Built-in observability patterns using OpenTelemetry and traceException error handling
Multi-tenant isolation patterns using projectId filtering for secure data access
0 GitHub stars

Use Cases

Developing secure and scalable tRPC routers for Next.js 14 applications
Implementing background job processing and queue consumers with BullMQ
Creating versioned public REST APIs with integrated authentication and Zod validation

About

Key Features

Standardized layered architecture enforcement (Procedures/Queues -> Services -> DB)
Automated checklists for tRPC features, public REST APIs, and BullMQ processors
Dual-database integration strategies for PostgreSQL (Prisma) and ClickHouse
Built-in observability patterns using OpenTelemetry and traceException error handling
Multi-tenant isolation patterns using projectId filtering for secure data access
0 GitHub stars

Use Cases

Developing secure and scalable tRPC routers for Next.js 14 applications
Implementing background job processing and queue consumers with BullMQ
Creating versioned public REST APIs with integrated authentication and Zod validation