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MCP Header Forwarding Failure (Discovery Phase)

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

external

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

Status: Open.

Bug

#35574 In langchain-ai/langchain;

· amelmgn opened on Mar 5, 2026

WeaviateVectorStore fails silently on index

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

external

Status: Open.

Bug

#35572 In langchain-ai/langchain;

· Luc Stiemer (xQsM3) opened on Mar 5, 2026

Support for gemini-3.1-flash-lite-preview and gemini-3-flash-preview from Google AI Studio

external

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

Status: Open.

Feature

#35571 In langchain-ai/langchain;

· Son Nguyen (nguyenhongson1902) opened on Mar 5, 2026

.

external

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

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

Status: Open.

Feature

#35570 In langchain-ai/langchain;

· Divy yadav (dvy246) opened on Mar 5, 2026

AI 效率工具实践分享 - 基于 LangChain 的工作流

external

Status: Open.

#35567 In langchain-ai/langchain;

· zhuxunyu opened on Mar 5, 2026

count_tokens_approximately: missing handler for tool_use content blocks causes ~2.4x overcounting

external

Status: Open.

#35558 In langchain-ai/langchain;

· Fabian Biebl (fbiebl) opened on Mar 4, 2026

Review, improvement, and migration of SemanticChunker to a non-experimental langchain pachage

external

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

text-splittersRelated to the package `text-splitters`Related to the package `text-splitters`

Status: Open.

Feature

#35553 In langchain-ai/langchain;

· Rodrigo Brocchi (brocchirodrigo) opened on Mar 4, 2026

Inconsistent multimodal image format: JS camelCase vs Python snake_case

external

Status: Open.

#35548 In langchain-ai/langchain;

· huyiZhang (huge0612) opened on Mar 4, 2026

Args with default_factory in a tool's args_schema should not be required

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

external

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

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

Status: Open.

Feature

#35547 In langchain-ai/langchain;

· Wang Liao (liaowang11) opened on Mar 4, 2026

AzureChatOpenAI initialization is not backwards compatible - forcing User-Agent header override

external

Status: Open.

#35521 In langchain-ai/langchain;

· Liraz Aharoni (appliraz) opened on Mar 2, 2026

Add Capsule to safely run untrusted code using WebAssembly sandboxes

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

external

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

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

Status: Open.

Feature

#35518 In langchain-ai/langchain;

· Mohamed Diallo (mavdol) opened on Mar 2, 2026

Streaming tool call executed with empty args {} due to SSE fragmentation of tool call arguments

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

external

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

Status: Open.

Bug

#35514 In langchain-ai/langchain;

· backer-and opened on Mar 2, 2026