https://joejztang.github.io/tags/agent/Recent content in Agent on 130lHugoenThu, 15 Oct 2026 00:00:00 -0700https://joejztang.github.io/posts/langchain-langgraph-cheatsheet/Thu, 15 Oct 2026 00:00:00 -0700https://joejztang.github.io/posts/langchain-langgraph-cheatsheet/<div> <h1>Table of Contents</h1> <nav id="TableOfContents"> <ul> <li><a href="#part-1--beginner">Part 1 — Beginner</a> <ul> <li><a href="#1-chat-models--messages">1. Chat Models &amp; Messages</a></li> <li><a href="#2-tools--tool-calling">2. Tools &amp; Tool Calling</a></li> <li><a href="#3-langgraph-core-concepts">3. LangGraph Core Concepts</a></li> <li><a href="#4-conditional-edges-router-pattern">4. Conditional Edges (Router Pattern)</a></li> <li><a href="#5-using-messages-as-state">5. Using Messages as State</a></li> <li><a href="#6-react-agent">6. ReAct Agent</a></li> <li><a href="#7-short-term-memory-checkpointer">7. Short-term Memory (Checkpointer)</a></li> </ul> </li> <li><a href="#part-2--intermediate">Part 2 — Intermediate</a> <ul> <li><a href="#8-state-schema-options">8. State Schema Options</a></li> <li><a href="#9-reducers">9. Reducers</a></li> <li><a href="#10-multiple-schemas">10. Multiple Schemas</a></li> <li><a href="#11-trim--filter-messages">11. Trim &amp; Filter Messages</a></li> <li><a href="#12-streaming">12. Streaming</a></li> <li><a href="#13-human-in-the-loop">13. Human-in-the-Loop</a></li> <li><a href="#14-time-travel">14. Time Travel</a></li> <li><a href="#15-parallelization-fan-out--fan-in">15. Parallelization (Fan-out / Fan-in)</a></li> <li><a href="#16-sub-graphs">16. Sub-graphs</a></li> <li><a href="#17-map-reduce-send-api">17. Map-Reduce (Send API)</a></li> <li><a href="#18-long-term-memory-memory-store">18. Long-term Memory (Memory Store)</a></li> <li><a href="#19-memory-schemas">19. Memory Schemas</a></li> <li><a href="#20-deployment--langgraph-platform">20. Deployment &amp; LangGraph Platform</a></li> <li><a href="#21-assistants-configuration-variants">21. Assistants (Configuration Variants)</a></li> <li><a href="#22-double-texting-strategies">22. Double-Texting Strategies</a></li> </ul> </li> <li><a href="#quick-reference">Quick Reference</a></li> </ul> </nav> </div> <blockquote> <p>This post was generated with the help of <a href="https://claude.ai" class="external-link" target="_blank" rel="noopener">Claude</a> (Anthropic), based on the <a href="https://academy.langchain.com/courses/intro-to-langgraph" class="external-link" target="_blank" rel="noopener">LangChain Academy — Introduction to LangGraph</a> course.</p>