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Error in create_agent() when enable "messages" streaming mode: 'Error: is not a valid tool'

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Bug

#34654 In langchain-ai/langchain;

· Smpests opened on Jan 8, 2026

astream lose when useing deep-Thinking model

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Bug

#34648 In langchain-ai/langchain;

· LLLzxx opened on Jan 8, 2026

Langsmith <code>include_model</code> broken due to deserialization allowlist

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

core`langchain-core` package issues & PRs`langchain-core` package issues & PRs

Status: Open.

Bug

#34645 In langchain-ai/langchain;

· gabrielrfg opened on Jan 8, 2026

Request for Guidance: Reasoning Transparency After Migrating from <code>ZeroShotAgent</code> to <code>create_agent</code>

core`langchain-core` package issues & PRs`langchain-core` package issues & PRs

feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionality

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Feature

#34630 In langchain-ai/langchain;

· Yuvashrikumar opened on Jan 7, 2026

OllamaEmbeddings doesnt support <code>output_dimensionality</code> in embed_documents method.

feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionality

ollama`langchain-ollama` package issues & PRs`langchain-ollama` package issues & PRs

Status: Open.

Feature

#34623 In langchain-ai/langchain;

· fathurwithyou opened on Jan 7, 2026

Issue: Deprecation warning guides users to langchain.agents, breaking stream_mode="messages" token streaming

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

core`langchain-core` package issues & PRs`langchain-core` package issues & PRs

groq`langchain-groq` package issues & PRs`langchain-groq` package issues & PRs

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Bug

#34613 In langchain-ai/langchain;

· AmazyanAyoub opened on Jan 6, 2026

OpenAI.BadRequestError when using create_agent with structured output and tools with optional input parameters

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

core`langchain-core` package issues & PRs`langchain-core` package issues & PRs

langchain`langchain` package issues & PRs`langchain` package issues & PRs

openai`langchain-openai` package issues & PRs`langchain-openai` package issues & PRs

Status: Open.

Bug

#34596 In langchain-ai/langchain;

· sabri-bruc-scacap opened on Jan 4, 2026

Bug Report: <code>create_agent</code> Doesn't Persist <code>None</code> Values in Command Updates

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Bug

#34590 In langchain-ai/langchain;

· stzonis opened on Jan 3, 2026

Add Official Support for Conda as an Alternative Dependency Manager in Development/Container Environments

feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionality

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Feature

#34578 In langchain-ai/langchain;

· riunyfir opened on Jan 2, 2026

Bug Report: uv sync --dev Fails Due to Insufficient Permissions for Non-Root Users, Causing Dependency Installation Interruption Problem Description

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

langchain`langchain` package issues & PRs`langchain` package issues & PRs

Status: Open.

Bug

#34577 In langchain-ai/langchain;

· riunyfir opened on Jan 2, 2026

ToolRuntime isn't injected into BaseTool subclass's _run

bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing feature

langchain`langchain` package issues & PRs`langchain` package issues & PRs

openai`langchain-openai` package issues & PRs`langchain-openai` package issues & PRs

Status: Open.

Bug

#34558 In langchain-ai/langchain;

· sammyne opened on Jan 1, 2026

Support Agent Skills

feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionality

Status: Open.

Feature

#34548 In langchain-ai/langchain;

· Fly-Playgroud opened on Dec 31, 2025