Add 3 elite-tier AI agent projects to Category 4

- gpt-researcher (26.6k stars): Autonomous deep research agent
- mcp-agent (7.8k stars): MCP-based agent framework by LastMile AI
- KaibanJS (1.3k stars): Kanban-inspired multi-agent framework

All projects verified: 1000+ stars, active development, OSI-approved licenses

Author: alvinreal

README.md

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 - **[Marvin](https://github.com/PrefectHQ/marvin)** ![GitHub stars](https://img.shields.io/github/stars/PrefectHQ/marvin?style=social) - Python framework for structured outputs and agentic AI workflows. Simplifies LLM interactions with type-safe interfaces, automatic schema generation, and built-in observability. From the creators of Prefect. Apache 2.0 licensed.
 
 - **[Burr](https://github.com/apache/burr)** ![GitHub stars](https://img.shields.io/github/stars/apache/burr?style=social) - Apache incubating framework for building stateful AI applications (chatbots, agents, simulations). Monitor, trace, persist, and execute on your own infrastructure with built-in UI and pluggable memory. Apache 2.0 licensed.
+- **[KaibanJS](https://github.com/kaiban-ai/KaibanJS)** ![GitHub stars](https://img.shields.io/github/stars/kaiban-ai/KaibanJS?style=social) - JavaScript-native framework for building and managing multi-agent systems with a Kanban-inspired approach. Visual task board for AI agents with real-time collaboration features. MIT licensed.
 
 #### Multi-Agent Orchestration
 
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 - **[OpenAI Agents SDK](https://github.com/openai/openai-agents-python)** ![GitHub stars](https://img.shields.io/github/stars/openai/openai-agents-python?style=social) - Production-ready lightweight framework for multi-agent workflows. The evolution of Swarm with enhanced orchestration capabilities and enterprise-grade features.
 - **[Paperclip](https://github.com/paperclipai/paperclip)** ![GitHub stars](https://img.shields.io/github/stars/paperclipai/paperclip?style=social) - AI agent company and orchestration framework with 55K+ stars. MIT licensed.
 - **[AgentScope](https://github.com/agentscope-ai/agentscope)** ![GitHub stars](https://img.shields.io/github/stars/agentscope-ai/agentscope?style=social) - Alibaba's production-ready multi-agent framework with 23K+ stars. Features built-in MCP and A2A support, message hub for flexible orchestration, and AgentScope Runtime for production deployment.
+- **[mcp-agent](https://github.com/lastmile-ai/mcp-agent)** ![GitHub stars](https://img.shields.io/github/stars/lastmile-ai/mcp-agent?style=social) - Build effective agents using Model Context Protocol and simple workflow patterns. Handles connection mechanics, LLM integration, and persistent state for production MCP-based agents. MIT licensed.
 - **[Microsoft Agent Framework](https://github.com/microsoft/agent-framework)** ![GitHub stars](https://img.shields.io/github/stars/microsoft/agent-framework?style=social) - Microsoft's official framework combining AutoGen's agent abstractions with Semantic Kernel's enterprise features. Supports Python and .NET with graph-based workflows.
 - **[Agency Swarm](https://github.com/VRSEN/agency-swarm)** ![GitHub stars](https://img.shields.io/github/stars/VRSEN/agency-swarm?style=social) - Reliable multi-agent orchestration framework built on top of the OpenAI Assistants API with organizational structure modeling.
 - **[elizaOS](https://github.com/elizaOS/eliza)** ![GitHub stars](https://img.shields.io/github/stars/elizaOS/eliza?style=social) - Autonomous multi-agent framework for building and deploying AI-powered applications. Features Discord/Telegram/Farcaster connectors, RAG support, and a modern web dashboard.
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 - **[Langflow](https://github.com/langflow-ai/langflow)** ![GitHub stars](https://img.shields.io/github/stars/langflow-ai/langflow?style=social) - Visual low-code platform for agentic workflows.
 - **[Dify](https://github.com/langgenius/dify)** ![GitHub stars](https://img.shields.io/github/stars/langgenius/dify?style=social) - Production-ready agentic workflow platform.
 - **[OWL (camel-ai/owl)](https://github.com/camel-ai/owl)** ![GitHub stars](https://img.shields.io/github/stars/camel-ai/owl?style=social) - Advanced multi-agent collaboration system.
+- **[gpt-researcher](https://github.com/assafelovic/gpt-researcher)** ![GitHub stars](https://img.shields.io/github/stars/assafelovic/gpt-researcher?style=social) - Autonomous agent that conducts deep online research on any topic. Generates comprehensive reports with citations by orchestrating web searches, content scraping, and synthesis. Apache 2.0 licensed.
 - **[AI-Scientist-v2 (SakanaAI)](https://github.com/SakanaAI/AI-Scientist-v2)** ![GitHub stars](https://img.shields.io/github/stars/SakanaAI/AI-Scientist-v2?style=social) - Workshop-level automated scientific discovery via agentic tree search. Generates novel research ideas, runs experiments, and writes papers.
 - **[PraisonAI](https://github.com/MervinPraison/PraisonAI)** ![GitHub stars](https://img.shields.io/github/stars/MervinPraison/PraisonAI?style=social) - 24/7 AI employee team for automating complex challenges. Low-code multi-agent framework with handoffs, guardrails, memory, RAG, and 100+ LLM providers.
 - **[Agent-S (Simular AI)](https://github.com/simular-ai/Agent-S)** ![GitHub stars](https://img.shields.io/github/stars/simular-ai/Agent-S?style=social) - Open agentic framework that uses computers like a human. SOTA on OSWorld benchmark (72.6%) for GUI automation and computer control.