https://dev.to/copilotkit/heres-how-to-build-fullstack-agent-apps-gemini-copilotkit-langgraph-15jb: "We are going to build two practical agents: Post Generator that drafts LinkedIn/X content using live web search & Stack Analyzer that inspects GitHub repos and creates structured reports. We will be using Next.js frontend, FastAPI backend, CopilotKit, LangGraph workflows, and Google Gemini."