LangChain Orchestration Skill Complete guide for building production-grade LLM applications with LangChain, covering chains, agents, memory, RAG patterns, and advanced orchestration techniques. Table of Contents 1. Core Concepts 2. Chains 3. Agents 4. Memory Systems 5. RAG Patterns 6. LLM Integrations 7. Callbacks & Monitoring 8. Retrieval Strategies 9. Streaming 10. Error Handling 11. Production Best Practices Core Concepts LangChain Expression Language (LCEL) LCEL is the declarative way to compose chains in LangChain, enabling streaming, async, and parallel execution. Runnable Interface Eve…