CopilotKit: CopilotKit is a React framework for embedding AI copilots, chatbots, and in-app agents directly into web applications. It provides UI components (chat interface, sidebar, textarea) and backend infrastructure for building agentic frontends — where AI can read and modify application state, take actions, and render generative UI. Supports LangChain, LangGraph, CrewAI, and custom agent backends.; bilig: bilig is a headless workbook runtime for TypeScript. It allows Node.js services, agent tools, and serverless functions to use spreadsheet formulas and workbook state programmatically without a visual interface. It features formula evaluation, persistence, round-trip verification, and MCP support.
Adding a context-aware AI copilot to a SaaS product that understands app state
Server-side spreadsheet automation (e.g., invoice totals, budget variance)