Issues

• ClearToolUsesEdit fails to clear tool inputs in content blocks

  bugexternallangchain
  Bug

  langchain-ai/langchain#41238 · Filter by author UnZHGPPT opened on Oct 14, 2026
  1

• openai: streaming drops the assistant audio payload, so a streamed audio turn cannot be continued

  bugexternalopenai
  Bug

  langchain-ai/langchain#41237 · Filter by author kodurd opened on Oct 14, 2026
  3

• core: expose the prompt template to chat model and LLM callbacks so tracers can attach it to GenAI spans

  coreexternalfeature request
  Feature

  langchain-ai/langchain#41235 · Filter by author theshubhamgoel opened on Oct 13, 2026

• ShellSession.execute: Command include "exit N" can lead to a TimeOut

  bugexternallangchain
  Bug

  langchain-ai/langchain#41228 · Filter by author master1018 opened on Oct 13, 2026
  5

• A text-plain content block with inline text is rejected by the Bedrock, Gemini and OpenAI converters

  bugcoreexternalopenai
  Bug

  langchain-ai/langchain#41227 · Filter by author awg66 opened on Oct 12, 2026
  3

• langchain-typesafe: NaN/Infinity in state or criteria crash invoke with uncaught ValueError from httpx2 internals

  bugexternaltypesafe
  Bug

  langchain-ai/langchain#41214 · Filter by author kittimzhe opened on Oct 12, 2026
  2

• langchain-core: add a beta BaseDecisionModel interface for bounded judgments

  coreexternalinvestigateopenaistandard-teststypesafe
  langchain-ai/langchain#41193 · Filter by author teenaxta opened on Oct 10, 2026
  3

• perf(text-splitters): reduce repeated list copying during chunk eviction

  externalfeature requesttext-splitters
  Feature

  langchain-ai/langchain#41191 · Filter by author mowne67 opened on Oct 10, 2026
  1

• text-splitters: add_start_index returns an earlier duplicate's position when a chunk is shorter than chunk_overlap

  bugexternaltext-splitters
  Bug

  langchain-ai/langchain#41190 · Filter by author SANJANAKUMARI83 opened on Oct 10, 2026
  3

• HTMLSemanticPreservingSplitter corrupts text containing the literal PRESERVED_<n> (in-band placeholder) and _reinsert_preserved_elements is O(chunks x placeholders)

  bugexternaltext-splitters
  Bug

  langchain-ai/langchain#41186 · Filter by author moneebullah25 opened on Oct 9, 2026
  3

• HTMLSemanticPreservingSplitter(allowlist_tags=[...]) returns no documents (and drops preserved media)

  bugexternaltext-splitters
  Bug

  langchain-ai/langchain#41185 · Filter by author moneebullah25 opened on Oct 9, 2026
  3

• MarkdownTextSplitter and LatexTextSplitter never split on headings/sections (separators are regex-escaped)

  bugexternaltext-splitters
  Bug

  langchain-ai/langchain#41184 · Filter by author moneebullah25 opened on Oct 9, 2026
  5

• [RFC] Feature: Add Runnable.with_rescue() / RunnableRescue for inline step recovery in LCEL

  externalfeature requestlangchain
  Feature

  langchain-ai/langchain#41179 · Filter by author powerofaisinstudy-debug opened on Oct 9, 2026
  4

• sanitize_for_postgres docstring examples pass literal escapes instead of NUL characters

  bugcoreexternal
  Bug

  langchain-ai/langchain#41177 · Filter by author normaltank opened on Oct 9, 2026
  2

• core: mustache ChatPromptTemplate input schema types nested variables as str, so as_tool rejects valid input

  bugcoreexternal
  Bug

  langchain-ai/langchain#41169 · Filter by author sahil-mangla opened on Oct 9, 2026
  2

• count_tokens_approximately omits tool calls when AIMessage content is a list

  bugcoreexternal
  Bug

  langchain-ai/langchain#41166 · Filter by author bnkaiteam opened on Oct 9, 2026
  3

• count_tokens_approximately omits tool calls when AIMessage content is a list

  bugcoreexternal
  Bug

  langchain-ai/langchain#41165 · Filter by author bnkaiteam opened on Oct 9, 2026
  1

• with_retry().batch() returns another input's result when only some inputs recover on retry

  bugcoreexternal
  Bug

  langchain-ai/langchain#41162 · Filter by author sho29 opened on Oct 8, 2026
  2

• convert_to_openai_messages drops invalid tool calls from exported conversations

  bugcoreexternal
  Bug

  langchain-ai/langchain#41157 · Filter by author aalquwayfili opened on Oct 8, 2026
  2

• anthropic: treat Bedrock Claude model IDs like their canonical names in the mid-conversation system message check

  anthropicexternalfeature request
  Feature

  langchain-ai/langchain#41150 · Filter by author AlcebiadesFilho opened on Oct 8, 2026
  2

• XMLOutputParser.parse() removes valid elements with encoding attributes followed by newlines

  bugcoreexternal
  Bug

  langchain-ai/langchain#41149 · Filter by author Mohit-25-tech opened on Oct 8, 2026
  1

• SummarizationMiddleware replaces history with a placeholder when no HumanMessage falls in the trim window

  bugexternallangchain
  Bug

  langchain-ai/langchain#41146 · Filter by author Shaswathhere opened on Oct 8, 2026
  2

• [Feature]: Add format_context utility in langchain_core.documents for RAG prompts

  coreexternalfeature request
  Feature

  langchain-ai/langchain#41143 · Filter by author saptarshiroy39 opened on Oct 8, 2026
  1

• astream_events v2 does not emit terminal error events for failed runs

  bugcoreexternal
  Bug

  langchain-ai/langchain#41141 · Filter by author ANUBprad opened on Oct 8, 2026
  2

• merge_message_runs raises for ChatMessage roles and FunctionMessage names that differ

  bugcoreexternal
  Bug

  langchain-ai/langchain#41138 · Filter by author Mohit-25-tech opened on Oct 7, 2026
  6