Problemsby GlyphLangChain users keep filing bugs
27 posts from 23 people20d activeRising, +3 this week
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The posts behind it
Merge streamed chunks once in the remaining runnable accumulators
Follow-up to #41697, which buffers streamed `AIMessageChunk`s and merges them once in runnable stream accumulators (`_ChunkAccumulator` in `runnables/base.py`). These accumulators still add each chunk with `+`, so streaming a large tool call through them re-parses the args...
langchain-openai: gpt-6.1-terra profile is missing mid-conversation and reasoning-effort overrides
### Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I used the GitHub search to find a similar feature request and didn't find it. - [x] I checked the...
langchain-openai: gpt-6.1-terra profile is missing mid-conversation and reasoning-effort overrides
### Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I used the GitHub search to find a similar feature request and didn't find it. - [x] I checked the...
langchain-core: `content_blocks` drops `extras` when converting Google GenAI `image_url` blocks
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
docs: typos in tools/base.py comments
Found minor typos in libs/core/langchain_core/tools/base.py: propreties -> properties, intance -> instance.
_generate_response_from_error leaves an unawaited coroutine when the error's response comes from an async HTTP client
### Package langchain-core ### Reproduction Steps / Example Code (Python) ### Error Message and Stack Trace (if applicable) ### Description When a chat model call fails, `_generate_response_from_error` calls `error.response.json()` synchronously. Some provider SDKs, including...
langchain-model-profiles README misnames refresh output and omits working directory
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
langchain-model-profiles symlink error misnames generated output file
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
with_retry(retry_if_exception_type=SomeError) retries every exception since 1.6.9
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
langchain: add reversible pseudonymize strategy and composite context detectors to PIIMiddleware
### Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I used the GitHub search to find a similar feature request and didn't find it. - [x] I checked the...
Which LLMOps platforms pass security reviews? SOC 2 and GDPR ? I’m the one doing review of this month abd I NEED HELP
am a security engineer at a B2B SaaS meaning am the last line of defense, mostly EU customers. our AI team picked an LLMOps platform and the vendor review landed on me. i’ve done plenty of these for normal SaaS, but LLM tooling has a couple of quirks the standard questionnaire...
Could this be the future of the internet?We need your opinions and advice on this project.
langchain-core: add a beta BaseDecisionModel interface for bounded judgments
## Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I searched GitHub for a similar feature request and did not find one covering this shared...
Guidence to learn langchain from scratch
Hello there . I am currently curious about learn langchain for making agentic workflow . Idk I read that somewhere on internet . So yeah If we use langchain Or langraph or something for building those agentic workflows . Guide me through it how can I become good at it .
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...
MarkdownTextSplitter and LatexTextSplitter never split on headings/sections (separators are regex-escaped)
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
Feature Request: Add x402 Scraper Tool to Community
Creating tool for x402
Feature Request: Add x402 Scraper Tool to Community
Creating tool for x402 via GraphQL with assignment
[FEATURE] Add Search1API search, news and crawl tools to crewai-tools
### Feature Area Integration with external tools ### Is your feature request related to a an existing bug? Please link it here. NA ### Describe the solution you'd like Add [Search1API](https://s1.dev) tools to `crewai-tools`, alongside the existing search tools (Tavily, Serper,...
MarkdownHeaderTextSplitter: code fence closed by shorter or info-string fence, so # lines inside code are split as headers
### Description `MarkdownHeaderTextSplitter` treats a fenced code block as closed as soon as a line starts with `) around a shorter inner example, or when a line like python from langchain_text_splitters import MarkdownHeaderTextSplitter s = MarkdownHeaderTextSplitter([("#",...
Question: how should an external fail-closed evidence verifier be published for crews?
crewai-alex-evidence 0.1.0 is on PyPI: https://pypi.org/project/crewai-alex-evidence/ It is a thin BaseTool adapter. Verification is delegated to langchain-alex; there is no second verifier implementation. The trust anchor is passed in by the caller and is never read from the...
langchain-core: is_data_content_block recomputes the block types on every call, ~23ms per ChatOpenAI payload
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
langchain-typesafe: TypeSafeClassifier declares serialization support but cannot round-trip through built-in deserialization
...declares serialization support. After normal secret handling is configured, one workaround is to supply both a custom import mapping and `valid_namespaces=["langchain_typesafe"]`. ### Compatibility and possible resolution The current serialized ID should remain deserializable...
MCP Apps (SEP-1865): first-class support for hosts that render a server's UI
## Summary [MCP Apps (SEP-1865)](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/docs/specification/draft/sep-1865.md) lets an MCP server return a **user interface** instead of text. A tool declares a `ui://` resource; the host renders it in a sandboxed...
langchain 1.4.0: any after_model middleware using documented `jump_to="tools"` bypasses the HITL pending_tool_calls gate and re-executes rejected tool calls
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
core: `AIMessage.content_blocks` mutates the original text block when attaching Google grounding citations
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
core: `AIMessage.content_blocks` mutates the original text block when attaching Google grounding citations
### Submission checklist - [x] This is a bug, not a usage question. - [x] I added a clear and descriptive title that summarizes this issue. - [x] I used the GitHub search to find a similar question and didn't find it. - [x] I am sure that this is a bug in LangChain rather than...
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About this problem
Evidence
27 posts from 23 people in 4 places, about 2 a week over 71 days. Mostly on langchain-ai/langchain, crewAIInc/crewAI, r/LangChain. Tools named alongside: GitHub, Anthropic, OpenAI, Perplexity.
Frustration Frustration 0 of 3· Seen on GitHub issues, Reddit
How it was grouped
Posts about LangChain that state a pain but match no known issue yet. First post Aug 27, 2026, latest Nov 5, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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