Mastra typescript framework for model harnessing

Mastra is an open-source, TypeScript-native framework designed to build, test, and deploy production-grade AI agents and structured workflows.

Built from the ground up for the TypeScript ecosystem, Mastra provides the complete scaffolding needed to transition AI prototypes into reliable production systems. The framework integrates directly with over 40 LLM providers through a unified interface, offering essential primitives like autonomous agents, graph-based workflows with human-in-the-loop pauses, and built-in RAG pipelines. By eliminating the need to bridge Python-first tooling into web stacks, Mastra allows developers to orchestrate complex multi-step processes, author Model Context Protocol (MCP) servers, and run automated evaluations (evals) using a single, cohesive codebase.

https://mastra.ai