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parse_partial_json fails on raw \\r and \\t inside strings

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

external

Status: Open.

#36747 In langchain-ai/langchain;

· Rudra Tiwari (Rudra-Tiwari-codes) opened on Apr 15, 2026

RunnableWithFallbacks.batch uses strict=False zip, can silently misalign outputs

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

external

Status: Open.

#36746 In langchain-ai/langchain;

· Rudra Tiwari (Rudra-Tiwari-codes) opened on Apr 15, 2026

InMemoryVectorStore.add_documents silently drops documents on embedding count mismatch

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

external

Status: Open.

#36745 In langchain-ai/langchain;

· Rudra Tiwari (Rudra-Tiwari-codes) opened on Apr 15, 2026

XMLOutputParser._root_to_dict drops child elements when parent has text

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

external

Status: Open.

#36744 In langchain-ai/langchain;

· Rudra Tiwari (Rudra-Tiwari-codes) opened on Apr 15, 2026

feat(core): Add EChartsOutputParser for structured chart generation

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

external

Status: Open.

#36735 In langchain-ai/langchain;

· slepybear opened on Apr 15, 2026

Add comprehensive unit tests for ModelCallLimitMiddleware

external

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

Status: Open.

#36734 In langchain-ai/langchain;

· slepybear opened on Apr 15, 2026

docs(core,langchain): update outdated model references in docstrings and examples to latest GA versions

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

external

Status: Open.

#36732 In langchain-ai/langchain;

· slepybear opened on Apr 15, 2026

Add Perplexity embedding models

external

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

perplexity`langchain-perplexity` package issues & PRs`langchain-perplexity` package issues & PRs

Status: Open.

Feature

#36726 In langchain-ai/langchain;

· Caio Costa (CaioSBC) opened on Apr 14, 2026

Docs: add Superlinked (SIE) embeddings integration page

external

Status: Open.

#36712 In langchain-ai/langchain;

· Filip Makraduli (fm1320) opened on Apr 14, 2026

Fix typo in Visitor._validate_func error message for operators

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

Status: Open.

Bug

#36701 In langchain-ai/langchain;

· eye-gu (eye-gu) opened on Apr 13, 2026

Add ToolArgValidationMiddleware — a new agent middleware that validates LLM-generated tool-call arguments

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

#36700 In langchain-ai/langchain;

· S3rj (Serjbory) opened on Apr 13, 2026

ShellSession times out when stdout has no trailing newline and the done marker is appended to the same line

external

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

Status: Open.

#36696 In langchain-ai/langchain;

· nu1lx opened on Apr 13, 2026