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Welcome to the Complete LangChain Masterclass (4 Hours 32 Minutes) — your all-in-one guide to mastering LangChain, from beginner to advanced. 🎓 This video combines all 31 episodes of the LangChain series into one seamless learning journey. Whether you’re building AI assistants, tool-using agents, or structured reasoning systems — this masterclass will take you from the fundamentals all the way to real-world, production-ready applications. 💡 What You’ll Learn: ✅ The core concepts behind LangChain: Chains, Tools, and Agents ✅ Creating and managing prompts for dynamic reasoning ✅ Building and using custom tools with @tool and StructuredTool ✅ Grouping tools into Toolkits for modular AI systems ✅ Binding tools to LLMs for real-time reasoning and execution ✅ Multi-step agent workflows with contextual memory ✅ Advanced topics like InjectedToolArgs and decision-making flows ✅ Step-by-step coding walkthroughs with live demonstrations 🚀 By the end of this masterclass, you’ll not only understand LangChain — you’ll be able to design, build, and deploy intelligent, agentic systems capable of performing complex reasoning and tool interactions. Perfect for developers, AI engineers, and researchers who want to build practical LLM-powered applications from scratch. 🎬 Timestamps (Chapters) 00:00:00 Introduction 00:01:36 First Interaction with Langchain 00:06:49 Chat history & message types for context awareness 00:15:48 ChatPromptTemplate 00:20:48 MessagePlaceHolder 00:28:04 StructuredOutput 00:36:33 Advanced Structured Outputs 00:44:59 StructuredOutputParser with Pydantic 00:53:47 StrOutputParser and Chains 01:08:19 StructuredOutputParser and OutputFixingParser 01:19:14 PydanticOutputParser 01:28:42 Sequential Chains 01:35:58 Conditional Chains 01:48:53 Parallel Chains 02:01:48 LLMChain 02:07:28 Understanding Embeddings 02:20:07 Building a RAG pipeline 02:34:14 RunnableSequence 02:41:27 RunnableParallel 02:48:19 DocumentLoaders 03:06:15 VectorStore 03:18:38 Retrievers 03:24:10 Chroma VectorStore Retriever 03:31:27 Project: Youtube Q&A RAG 03:47:41 Tools 03:53:13 StructuredTool 03:57:55 Toolkits 04:03:30 Tool Binding 04:08:57 EnforcedToolExecution 04:15:56 InjectedTool Explained