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LangChain Forum - Topics tagged intro-to-langgraph

Does HITL approval actually bind the action that reaches the executor? Production use of PostgresSaver: service-owned migrations and checkpoint retention in Node.js How are you guys stopping agents from silent loops/stampedes? Standard step_counters feel like garbage Introducing Langshark a local-first companion observability tool for self-hosted Langgraph deployments Help Needed : Best practices for client-side metadata filtering in custom checkpoint implementations? How do you actually decide between LangGraph, AutoGen, and which model to use for a task? Feedback requested: evaluating commit-time action validity in LangGraph workflows DeltaChannel + RemoveMessage message compression — how to express deletions with incremental storage? Research Q: what blocks your first LangGraph prod deploy? (not a pitch) A LangGraph checkpointer with provable thread deletion (signed erasure receipts) — feedback welcome Adding an end-to-end example: from locally-served model to agentic flow orchestration Deep Agent state cumbersome Sanity-check my LangGraph design before product demo LangGraph orchestration Problem Re-execute / restart from a specific task in a functional API AttributeError: 'AsyncSandboxClient' object has no attribute 'get_template' What is the equivalent of a transaction log for agent systems? Null-drift: A bare-metal O(1) Memory Store for continuous LangGraph agents Interrupt does not work correctly in LangGraph Pre-interrupt() code re-runs on resume — anti-pattern, or is there a sanctioned way to detect resume? Would pre-inference routing help long-context agent workflows? Improving citation accuracy and reducing hallucinations in custom Parent-Child RAG pipeline (Gemma3:4B + FAISS+BM25 + Cross-encoder reranker) Using LangGraph interrupt for multi-step wizards with branching — right tool or wrong abstraction? Built NORNR for spend governance in agent workflows LangGraph + PostgreSQL: Chat history and summarization best practice Discussion about why LangGraph JS ToolNode doesn’t inject ToolRuntime.state like Python does, and what the correct workaround or intended design pattern is. No cost displayed in LangSmith when using LiteLLM + LangGraph LiteLLM Router in LangChain: Missing Model Name and Cost in LangSmith Traces I find langgraph chat in documents useful, how can I hook it up as mcp or skill or a tool for the Claude Code? Can I get User IDs and Bot IDs of bots used in Slack channels for personal projects
WikipediaLoader endup in JSONDecodeError
Learium · 2026-04-29 · via LangChain Forum - Topics tagged intro-to-langgraph

In Module 5 research-assisant, (or in anyplace that uses wikipedialoader), my invoke stage akways end with ‘Wikipedia failed: JSONDecodeError(‘Expecting value: line 1 column 1 (char 0)’)’ , direct calling with requests api works fine, seems to be some issue with the wikipedialoader api? Not a big issue but it’s been bugging me a lot, wondering if anyone have the same issue. Attaching trace from langsmith

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