SWE-Kit, launched by Composio, is an open-source headless IDE designed to enhance AI agent development with AI-native coding toolkits. It includes a Language Server Protocol for code intelligence and a secure development container, along with tools for code analysis, file management, and Git operations. Utilizing LangGraph, SWE-Kit models agents as state machines, enabling efficient state management and enhancing workflow predictability. The platform's modularity allows developers to craft specialized agents tailored to specific tasks, demonstrated through the creation and benchmarking of a Software Engineering Agent that achieved a 48.60% accuracy rate in resolving issues from a set of 2294 GitHub problems. LangGraph's state management system, complemented by LangSmith's monitoring capabilities, ensures transparent and reliable agent operations, while SWE-Kit's architecture supports diverse applications beyond software engineering, such as CRM and HRM, thereby empowering developers to construct intelligent, workflow-transforming agents.