Code, Build and Evaluate agents - excellent Model and Skills/MCP/ACP/A2A Support

OpenJudge: A Unified Framework for Holistic Evaluation and Quality Rewards

An open-source, code-first Go toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

A Go framework for building production agent systems with graph workflows, tools, memory, A2A, AG-UI, MCP, evaluation, and observability.

Mastra is the modern TypeScript framework for AI-powered applications and agents.

The open-source TypeScript framework for building AI workflows and agents. Designed for Claude Code describe what you want, Claude builds it, with all the best practices already in place.