CopilotKit is an open-source Python framework designed for developers to build customized AI agents. It offers a modular architecture where you can register and configure tools — such as file system access, web search, Python REPL, and SQL connectors — then wire them into agents that leverage any supported LLM. Built-in memory modules allow conversation state persistence, while LangGraph lets you define structured reasoning flows for complex tasks. Agents can be deployed in scripts, web services, or CLI apps and scale across cloud providers. CopilotKit works seamlessly with OpenAI, Azure OpenAI, and Anthropic models, empowering automated workflows, chatbots, and data analysis bots.

Fast-LLM-Agent-MCP is a lightweight, open-source Python framework for building AI agents that combine memory management, chain-of-thought reasoning, and multi-step planning. Developers can integrate it with OpenAI, Azure OpenAI, local Llama, and other models to maintain conversational context, generate structured reasoning traces, and decompose complex tasks into executable subtasks. Its modular design allows custom tool integration and memory stores, making it ideal for applications like virtual assistants, decision support systems, and automated customer support bots.