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1,787 problems · 347 companies

LLM apps

Trouble with LangChain instead

2 posts from 2 people2d activeSteady, +1 this weekunverified

Posts per day

Posts per day2 posts, Oct 9 to Nov 11

The posts behind it

Stack OverflowStack Overflow [langchain] · mascaiNov 8

How to force langchain model to use my language instead of English

I created an agent with tools. I am asking the agent about weather (in Russian language). The tool get_weather expects Russian city names (e.g. Москва instead of Moscow), but the model puts English words into my tool. My code. import os from dotenv import load_dotenv from...

1 replies
GitHub issueslangchain-ai/langchain · normaltankOct 9

sanitize_for_postgres docstring examples pass literal escapes instead of NUL characters

### Description The two `sanitize_for_postgres` docstring examples pass a literal backslash escape instead of a NUL character, so neither produces its documented output. The docstring is raw (`r"""..."""`), making its double backslashes unnecessary. The function itself behaves...

1 replies

Companies and products named

2 posts
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About this problem

Evidence

2 posts from 2 people in 2 places, about 1 a week over 31 days. Mostly on langchain-ai/langchain, Stack Overflow [langchain]. Tools named alongside: GitHub, OpenAI.

Frustration Frustration 0 of 3· Seen on GitHub issues, Stack Overflow

How it was grouped

Posts about LangChain with no known issue, sharing the word "instead". First post Oct 9, 2026, latest Nov 8, 2026. Unverified: fewer than 3 posts, or one person or place only. Method

Other LangChain problems

LangChain users keep filing bugs

Top post: "langchain 1.4.0: any after_model middleware using documented `jump_to=tools` bypasses the HITL", one of 26 posts from 22 people on GitHub issues, Reddit.

LangChain upgrades break working setups

10 posts from 10 people on GitHub issues, Reddit.

Trouble with LangChain agent

Top post: "langchain-classic: importing a moved agent from `agent_toolkits` raises `ValueError` instead of `ImportError`", one of 8 posts from 7 people on GitHub issues, Reddit, Stack Overflow.

RAG on LangChain returns irrelevant or missing context

8 posts from 7 people on Reddit, GitHub issues, Stack Overflow.

LangChain agents loop, stall or fail midway

5 posts from 5 people on Reddit, GitHub issues.

LangChain rate limits and usage caps block work

4 posts from 3 people on GitHub issues.

Trouble with LangChain test

Top post: "langchain: MCP adapter test asserts a POSIX-only error message, fails on Windows where the drive letter", one of 4 posts from 4 people on GitHub issues.

Trouble with LangChain agents

Top post: "Is it normal for a LangGraph supervisor to consume as many tokens as all 8 agents combined? How can we", one of 4 posts from 4 people on Reddit.

LangChain error messages are cryptic

3 posts from 2 people on GitHub issues.

LangChain vulnerabilities are hard to triage and patch

3 posts from 1 person on GitHub issues. Unverified.

Prompt injection makes LangChain features unsafe

3 posts from 2 people on Reddit, GitHub issues.

LangChain lock-in makes switching costly

2 posts from 2 people on GitHub issues. Unverified.

History

Momentum went from fading to steady.

Nov 11, 2026

Momentum went from new to fading.

Oct 16, 2026

First seen with 1 post; the top post now: "How to force langchain model to use my language instead of English".

Oct 11, 2026