# Latest **URL:** https://forum.langchain.com/latest.md [Latest](https://forum.langchain.com/latest.md) · [Categories](https://forum.langchain.com/categories.md) · [Tags](https://forum.langchain.com/tags.md) --- ## [Post Identification and Tags](https://forum.langchain.com/t/post-identification-and-tags/21)
**Author:** [@crystalr](https://forum.langchain.com/u/crystalr)\ **Replies:** 1\ **Last updated:** [August 15, 2026, 8:50am UTC](https://forum.langchain.com/t/post-identification-and-tags/21 "2026-08-15T08:50:39Z")
Tag your post in the Help \> Lang\* product subcategory to ensure the right experts are looking at your issue or question, e.g. cloud, hybrid, or self-hosted. --- ## [How to handle growing checkpoint blob?](https://forum.langchain.com/t/how-to-handle-growing-checkpoint-blob/4448)
**Author:** [@hks](https://forum.langchain.com/u/hks)\ **Replies:** 3\ **Last updated:** [September 23, 2026, 2:08pm UTC](https://forum.langchain.com/t/how-to-handle-growing-checkpoint-blob/4448 "2026-09-23T14:08:46Z")
I’m using open-source LangGraph with PostgresSaver and durability: "exit". The checkpoints table looks fine for my use case since I’m seeing roughly one checkpoint per chat request. The issue is that checkpoint\_blobs ke… --- ## [Managed Deep Agents: can the model be chosen at runtime, without redeploying?](https://forum.langchain.com/t/managed-deep-agents-can-the-model-be-chosen-at-runtime-without-redeploying/4595)
**Author:** [@dilip](https://forum.langchain.com/u/dilip)\ **Replies:** 2\ **Last updated:** [September 23, 2026, 1:12pm UTC](https://forum.langchain.com/t/managed-deep-agents-can-the-model-be-chosen-at-runtime-without-redeploying/4595 "2026-09-23T13:12:52Z")
I’d like users of our app to pick between provider models (Gemini / GPT / Claude) on a deployed Managed Deep Agent. The model seems fixed at deploy time, and the two overrides I’d expect to work are accepted and then sil… --- ## [There is no way to use custom filters like \`@\>\` with \`PGVectorStore\`](https://forum.langchain.com/t/there-is-no-way-to-use-custom-filters-like-with-pgvectorstore/4594)
**Author:** [@wbyoung](https://forum.langchain.com/u/wbyoung)\ **Replies:** 1\ **Last updated:** [September 23, 2026, 5:50am UTC](https://forum.langchain.com/t/there-is-no-way-to-use-custom-filters-like-with-pgvectorstore/4594 "2026-09-23T05:50:42Z")
It appears that it would be easy to subclass PGVectorStore and add support for custom operations via the filters if the buildFilterClauses method were not private. I’m new to the community. Is this the right place to di… --- ## [Beginner's LCAE Prep Journey — Sharing What I Learn Along the Way](https://forum.langchain.com/t/beginners-lcae-prep-journey-sharing-what-i-learn-along-the-way/4593)
**Author:** [@aftabhuss](https://forum.langchain.com/u/aftabhuss)\ **Replies:** 0\ **Last updated:** [September 23, 2026, 2:00am UTC](https://forum.langchain.com/t/beginners-lcae-prep-journey-sharing-what-i-learn-along-the-way/4593 "2026-09-23T02:00:32Z")
Hi, I’m Aftab — currently prepping full-time for the LCAE certification, coming from a graphic design background. Starting from Python fundamentals and working through LangChain Academy courses. I’ll be posting key conce… --- ## [I'm Harrison Chase. Ask me anything on Nov 13 & 14th](https://forum.langchain.com/t/im-harrison-chase-ask-me-anything-on-nov-13-14th/2113)
**Author:** [@hwchase17](https://forum.langchain.com/u/hwchase17)\ **Replies:** 25\ **Last updated:** [September 23, 2026, 1:52am UTC](https://forum.langchain.com/t/im-harrison-chase-ask-me-anything-on-nov-13-14th/2113 "2026-09-23T01:52:59Z")
Join me Thursday, November 13th from 8AM PST through Friday, November 14th 6PM PST for an AMA. We’ll use this same topic. Hit reply below to drop questions ahead of time! I’ll start answering your questions on the 13th. … --- ## [How can I Update Name In Certificate?](https://forum.langchain.com/t/how-can-i-update-name-in-certificate/4584)
**Author:** [@spyrakoss](https://forum.langchain.com/u/spyrakoss)\ **Replies:** 1\ **Last updated:** [September 22, 2026, 9:32am UTC](https://forum.langchain.com/t/how-can-i-update-name-in-certificate/4584 "2026-09-22T09:32:08Z")
Hello, I completed the foundation course on LangChain academy but the certificate name is “Google User” . I changed my name in account settings but it’s not updating the certificate. How can I get the name changed on t… --- ## [Best practices for a long-lived, agent-managed RAG / Knowledge Base?](https://forum.langchain.com/t/best-practices-for-a-long-lived-agent-managed-rag-knowledge-base/4549)
**Author:** [@SalvatoreLarosa](https://forum.langchain.com/u/SalvatoreLarosa)\ **Replies:** 3\ **Last updated:** [September 22, 2026, 2:59am UTC](https://forum.langchain.com/t/best-practices-for-a-long-lived-agent-managed-rag-knowledge-base/4549 "2026-09-22T02:59:30Z")
I’m looking for advice from people who have built and maintained serious RAG / Knowledge Base systems over time. I have a very large personal archive accumulated over many years around my professional interests: fintech… --- ## [Is provider KV caching sufficient for agent swarms and long run agents?](https://forum.langchain.com/t/is-provider-kv-caching-sufficient-for-agent-swarms-and-long-run-agents/4588)
**Author:** [@QuietZephyr19](https://forum.langchain.com/u/QuietZephyr19)\ **Replies:** 0\ **Last updated:** [September 21, 2026, 1:35am UTC](https://forum.langchain.com/t/is-provider-kv-caching-sufficient-for-agent-swarms-and-long-run-agents/4588 "2026-09-21T01:35:05Z")
I’m trying to build a side project in the inference space. I’ve been talking to a few inference engineers and startups and I’ve been hearing how annoying it is to not have manual control over the KV cache at times and ju… --- ## [Fixed graph vs LLM supervisor: lessons from building a 7-step paper writer in LangGraph](https://forum.langchain.com/t/fixed-graph-vs-llm-supervisor-lessons-from-building-a-7-step-paper-writer-in-langgraph/4582)
**Author:** [@prekshabarjatya](https://forum.langchain.com/u/prekshabarjatya)\ **Replies:** 0\ **Last updated:** [September 20, 2026, 12:24pm UTC](https://forum.langchain.com/t/fixed-graph-vs-llm-supervisor-lessons-from-building-a-7-step-paper-writer-in-langgraph/4582 "2026-09-20T12:24:54Z")
I built a LangGraph workflow that turns an assignment brief into a cited research paper, then ran it live against Groq, OpenAlex and Crossref. The biggest lesson was to keep routing in plain code and not let an LLM choos… --- ## [AgentLens — free, local-only CLI to audit what your LangChain agent actually did](https://forum.langchain.com/t/agentlens-free-local-only-cli-to-audit-what-your-langchain-agent-actually-did/4551)
**Author:** [@subhash-0000](https://forum.langchain.com/u/subhash-0000)\ **Replies:** 1\ **Last updated:** [September 19, 2026, 7:30am UTC](https://forum.langchain.com/t/agentlens-free-local-only-cli-to-audit-what-your-langchain-agent-actually-did/4551 "2026-09-19T07:30:56Z")
Been building with LangChain agents and kept running into the same problem: once an agent runs, I have no real record of what it decided, which tools it called, why, how long each step took, or what it cost. If something… --- ## [Question on Open Github Issue #7345: Status of configurable PostgreSQL schema](https://forum.langchain.com/t/question-on-open-github-issue-7345-status-of-configurable-postgresql-schema/4558)
**Author:** [@alive](https://forum.langchain.com/u/alive)\ **Replies:** 1\ **Last updated:** [September 18, 2026, 2:28pm UTC](https://forum.langchain.com/t/question-on-open-github-issue-7345-status-of-configurable-postgresql-schema/4558 "2026-09-18T14:28:22Z")
Hey everyone! :waving\_hand: Quick question regarding Issue #7345 (“Configurable PostgreSQL schema for langgraph-checkpoint-postgres”): https://github.com/langchain-ai/langgraph/issues/7345 It looks like there has been… --- ## [Exploring Provenance and Dependency-Aware Memory for Long-Horizon Agents](https://forum.langchain.com/t/exploring-provenance-and-dependency-aware-memory-for-long-horizon-agents/4412)
**Author:** [@Dhestor](https://forum.langchain.com/u/Dhestor)\ **Replies:** 1\ **Last updated:** [September 17, 2026, 9:09pm UTC](https://forum.langchain.com/t/exploring-provenance-and-dependency-aware-memory-for-long-horizon-agents/4412 "2026-09-17T21:09:36Z")
Exploring Provenance and Dependency-Aware Memory for Long-Horizon Agents Hi LangChain team and community, I’ve been exploring recent research on long-horizon agents, particularly the ReTree paper: I also explored the… --- ## [A problem of agent architecture](https://forum.langchain.com/t/a-problem-of-agent-architecture/4546)
**Author:** [@MSJavaScript](https://forum.langchain.com/u/MSJavaScript)\ **Replies:** 3\ **Last updated:** [September 16, 2026, 11:52pm UTC](https://forum.langchain.com/t/a-problem-of-agent-architecture/4546 "2026-09-16T23:52:28Z")
Hello, I am building an agent with architecture like below ModelNode reads skill docs and makes plans and assigns tasks to executor agent. My concern is, the executor is called by agent.invoke(messages), but the Mode… --- ## [First LangChain Docs Contribution - Next Steps?](https://forum.langchain.com/t/first-langchain-docs-contribution-next-steps/4541)
**Author:** [@sanne](https://forum.langchain.com/u/sanne)\ **Replies:** 3\ **Last updated:** [September 15, 2026, 8:16pm UTC](https://forum.langchain.com/t/first-langchain-docs-contribution-next-steps/4541 "2026-09-15T20:16:24Z")
I opened Issue #5863 for documentation updates and included a link to the changes in my fork. I read through the contribution guidelines, but since this is my first time contributing to the LangChain docs, I wasn’t sure … --- ## [The Right Solution/Architecture?](https://forum.langchain.com/t/the-right-solution-architecture/4522)
**Author:** [@ipatchcables](https://forum.langchain.com/u/ipatchcables)\ **Replies:** 3\ **Last updated:** [September 13, 2026, 12:27am UTC](https://forum.langchain.com/t/the-right-solution-architecture/4522 "2026-09-13T00:27:41Z")
I’m trying to build out a project that helps automate web testing work (I’m a dev - 100s over servers internally). I’m curious what approach would work best? I know it can’t be fully non-deterministic, but curious what t… --- ## [How are you guys stopping agents from silent loops/stampedes? Standard step\_counters feel like garbage](https://forum.langchain.com/t/how-are-you-guys-stopping-agents-from-silent-loops-stampedes-standard-step-counters-feel-like-garbage/4479)
**Author:** [@minakshihub](https://forum.langchain.com/u/minakshihub)\ **Replies:** 2\ **Last updated:** [September 14, 2026, 5:14pm UTC](https://forum.langchain.com/t/how-are-you-guys-stopping-agents-from-silent-loops-stampedes-standard-step-counters-feel-like-garbage/4479 "2026-09-14T17:14:06Z")
I’ve been looking at multi-agent failure states, and it seems like everyone is relying on basic Python step\_counters or LLM prompt-engineering (“do not repeat yourself”) to prevent agents from falling into infinite tool-… --- ## [Ephemeral Subagent Task - Deep Agent](https://forum.langchain.com/t/ephemeral-subagent-task-deep-agent/4518)
**Author:** [@ipatchcables](https://forum.langchain.com/u/ipatchcables)\ **Replies:** 2\ **Last updated:** [September 10, 2026, 1:55pm UTC](https://forum.langchain.com/t/ephemeral-subagent-task-deep-agent/4518 "2026-09-10T13:55:06Z")
Random task executes a dynamic subagent? AFAIK, this shouldn’t happen if you aren’t using CodeInterpreterMiddleware Really curious about this. ? Dynamic subagents - Docs by LangChain --- ## [Does HITL approval actually bind the action that reaches the executor?](https://forum.langchain.com/t/does-hitl-approval-actually-bind-the-action-that-reaches-the-executor/4517)
**Author:** [@Brodin2001](https://forum.langchain.com/u/Brodin2001)\ **Replies:** 2\ **Last updated:** [September 10, 2026, 12:11pm UTC](https://forum.langchain.com/t/does-hitl-approval-actually-bind-the-action-that-reaches-the-executor/4517 "2026-09-10T12:11:26Z")
Hey guys, I’ve been testing a failure mode in agent authorization that I’m not sure is getting enough attention. We usually model the flow as: agent proposes → human approves → tool executes But I think there are actu… --- ## [How are you handling governance for production LangChain agents? (PII, cost caps, tool safety)](https://forum.langchain.com/t/how-are-you-handling-governance-for-production-langchain-agents-pii-cost-caps-tool-safety/4315)
**Author:** [@nagasatish](https://forum.langchain.com/u/nagasatish)\ **Replies:** 5\ **Last updated:** [September 10, 2026, 11:21am UTC](https://forum.langchain.com/t/how-are-you-handling-governance-for-production-langchain-agents-pii-cost-caps-tool-safety/4315 "2026-09-10T11:21:19Z")
Curious how others are approaching governance for LangChain agents in production — specifically: PII leaking through RAG pipelines When a retriever pulls documents containing customer data (SSNs, emails, credit cards)… --- ## [Deep agent that scaffolds new LangChain/LangGraph agents on request — LocalShellBackend + langctl as tools?](https://forum.langchain.com/t/deep-agent-that-scaffolds-new-langchain-langgraph-agents-on-request-localshellbackend-langctl-as-tools/4436)
**Author:** [@Sami606713](https://forum.langchain.com/u/Sami606713)\ **Replies:** 4\ **Last updated:** [September 10, 2026, 7:24am UTC](https://forum.langchain.com/t/deep-agent-that-scaffolds-new-langchain-langgraph-agents-on-request-localshellbackend-langctl-as-tools/4436 "2026-09-10T07:24:29Z")
Problem I’m building a CLI (langctl) that scaffolds LangChain/LangGraph agent projects. I want to add a “builder” deep agent behind a chat UI that can take a request like “make me a research assistant” and actually pro… --- ## [Is support for MarkdownHeaderTextSplitter coming for Langchain-JS?](https://forum.langchain.com/t/is-support-for-markdownheadertextsplitter-coming-for-langchain-js/4516)
**Author:** [@michielvaneerd](https://forum.langchain.com/u/michielvaneerd)\ **Replies:** 1\ **Last updated:** [September 9, 2026, 4:40pm UTC](https://forum.langchain.com/t/is-support-for-markdownheadertextsplitter-coming-for-langchain-js/4516 "2026-09-09T16:40:54Z")
I see the Python Langchain supports the MarkdownHeaderTextSplitter which is needed keep the header hierarchy when chunking documents. But the Javascript Langchain does not seem to support this. Is this something that is … --- ## [Feature request: let a add\_conditional\_edges branch write into an existing add\_edge(\[...\], dest) barrier](https://forum.langchain.com/t/feature-request-let-a-add-conditional-edges-branch-write-into-an-existing-add-edge-dest-barrier/4513)
**Author:** [@AlejandroTorresMunoz](https://forum.langchain.com/u/AlejandroTorresMunoz)\ **Replies:** 0\ **Last updated:** [September 9, 2026, 9:11am UTC](https://forum.langchain.com/t/feature-request-let-a-add-conditional-edges-branch-write-into-an-existing-add-edge-dest-barrier/4513 "2026-09-09T09:11:36Z")
The gap add\_edge(\[source1, source2, ...\], dest) creates a NamedBarrierValue channel: dest becomes a real AND-join, firing only once every named source has written to it since it last fired. This works great, as long as e… --- ## [How to get structured output when using astream() or stream()](https://forum.langchain.com/t/how-to-get-structured-output-when-using-astream-or-stream/4509)
**Author:** [@MSJavaScript](https://forum.langchain.com/u/MSJavaScript)\ **Replies:** 1\ **Last updated:** [September 8, 2026, 11:06am UTC](https://forum.langchain.com/t/how-to-get-structured-output-when-using-astream-or-stream/4509 "2026-09-08T11:06:35Z")
Hello, I am using agent.astream() to print streaming message, but I don’t know how to get structured output like agent.invoke(). Anyone has some ideas ? def print\_msg(msg): if isinstance(msg, AIMessage): pr… --- ## [System Design of LC integration](https://forum.langchain.com/t/system-design-of-lc-integration/4500)
**Author:** [@RUTURAJROCks](https://forum.langchain.com/u/RUTURAJROCks)\ **Replies:** 1\ **Last updated:** [September 7, 2026, 11:09am UTC](https://forum.langchain.com/t/system-design-of-lc-integration/4500 "2026-09-07T11:09:21Z")
I am learning langchain and I want to study about how it is being implemented in big AI companies. As there are many for traditional designs like about Uber, Netflix system design , I want similar for this. Please sugges… --- ## [MoltsPayTool - Let your LangChain agent pay for AI services ](https://forum.langchain.com/t/moltspaytool-let-your-langchain-agent-pay-for-ai-services/3101)
**Author:** [@moltspay](https://forum.langchain.com/u/moltspay)\ **Replies:** 2\ **Last updated:** [September 7, 2026, 7:08am UTC](https://forum.langchain.com/t/moltspaytool-let-your-langchain-agent-pay-for-ai-services/3101 "2026-09-07T07:08:33Z")
Hey everyone! 👋 … --- ## [Feedback request: schema for blocked agent tool calls / audit evidence](https://forum.langchain.com/t/feedback-request-schema-for-blocked-agent-tool-calls-audit-evidence/4117)
**Author:** [@MkaliezZ](https://forum.langchain.com/u/MkaliezZ)\ **Replies:** 3\ **Last updated:** [September 6, 2026, 7:20am UTC](https://forum.langchain.com/t/feedback-request-schema-for-blocked-agent-tool-calls-audit-evidence/4117 "2026-09-06T07:20:46Z")
I’m looking for narrow technical feedback on a small schema/demo for blocked agent tool calls. The core idea is to represent a denied tool call as a completed policy decision, not as a failed tool execution. For example… --- ## [Structured query over withheld large tool results — a lossless alternative to clearing/summarizing](https://forum.langchain.com/t/structured-query-over-withheld-large-tool-results-a-lossless-alternative-to-clearing-summarizing/4497)
**Author:** [@shex1627](https://forum.langchain.com/u/shex1627)\ **Replies:** 0\ **Last updated:** [September 6, 2026, 7:16am UTC](https://forum.langchain.com/t/structured-query-over-withheld-large-tool-results-a-lossless-alternative-to-clearing-summarizing/4497 "2026-09-06T07:16:15Z")
I’ve been writing react agents and MCP servers for a while now, and a recurring problem is that MCP tool output is often large JSON — which gets expensive in tokens fast. As far as I’ve found, LangChain has two ways to h… --- ## [Production use of PostgresSaver: service-owned migrations and checkpoint retention in Node.js](https://forum.langchain.com/t/production-use-of-postgressaver-service-owned-migrations-and-checkpoint-retention-in-node-js/4481)
**Author:** [@waiz-ksolves](https://forum.langchain.com/u/waiz-ksolves)\ **Replies:** 2\ **Last updated:** [September 4, 2026, 2:16pm UTC](https://forum.langchain.com/t/production-use-of-postgressaver-service-owned-migrations-and-checkpoint-retention-in-node-js/4481 "2026-09-04T14:16:30Z")
We are planning to use @langchain/langgraph-checkpoint-postgres in a production Node.js service and have a few questions about the recommended database ownership and retention model. Our service team normally owns all P… --- ## [A LangGraph checkpointer with provable thread deletion (signed erasure receipts) — feedback welcome](https://forum.langchain.com/t/a-langgraph-checkpointer-with-provable-thread-deletion-signed-erasure-receipts-feedback-welcome/4137)
**Author:** [@cayerbe](https://forum.langchain.com/u/cayerbe)\ **Replies:** 1\ **Last updated:** [September 4, 2026, 12:23pm UTC](https://forum.langchain.com/t/a-langgraph-checkpointer-with-provable-thread-deletion-signed-erasure-receipts-feedback-welcome/4137 "2026-09-04T12:23:58Z")
Hey all — sharing something I built for my own agents and finally cleaned up enough to put out there. I’d genuinely value feedback from anyone running stateful LangGraph in production. The problem that started it. My ag… [Next page](https://forum.langchain.com/latest.md?page=1)