Seneca Microservices Framework

Seneca is a mature Node.js microservices framework designed to help organize application business logic through a pattern-matching approach to message passing. Currently at stable version 3.38.0, its release cadence is active but irregular, with a focus on stability and a smaller core. Key differentiators include its flexible pattern-matching for defining commands, transport independence that abstracts message delivery, and a robust ecosystem of plugins for common microservice concerns like data storage, user management, and distributed logic. The framework emphasizes breaking down applications into 'stuff that happens' rather than strict data models, providing a flexible toolkit for building Minimum Viable Products and complex distributed systems. It supports Node.js versions 10 and above and ships with TypeScript types.