LangChain Complete 2026
What It Does - LLM orchestration - Chains and agents - Memory - Tool calling - RAG Tools - LangChain Python + JS - LangGraph state - LangSmith observability Patterns - Sequential chains - Router chains - Agent loops - RAG pipelines Next Step AI agentshttps://vibecodingturkey.com/en/rehberler/ai-agents-2026.