agentscope

AgentScope is an open-source Python framework for building and running agents "you can see, understand and trust". Version 2.0 is designed around increasingly capable models: rather than constraining them with rigid prompts and orchestrations, it gives them good building blocks and lets their reasoning and tool use do the work. It is developed by the agentscope-ai team and backed by an arXiv paper.

It suits Python developers building production agents and multi-agent systems. Building blocks include a ReAct agent loop with structured output and interruption and resume, a toolkit spanning Python tools, MCP servers and skills (with built-in coding tools), models from major providers including OpenAI, Anthropic, Gemini, DashScope, DeepSeek and Ollama, automatic context compaction, and a unified event stream for front ends. Recent releases add pipelines and team pipelines in which a leader delegates to member agents, the A2A protocol, model routing, standard operating procedures and realtime voice agents.

Getting started: requires Python 3.11+. Install with `uv pip install agentscope`, or install from source in editable mode, then build an agent from the ReAct building block and add tools and models.