Changes since langchain==1.2.1
fix(langchain): add test to verify version (#34644) release(langchain): release 1.2.2 (#34643) fix(langchain): handle parallel usage of the todo tool in planning middleware (#34637) chore(langchain): fix types in test_wrap_model_call (#34573)
Changes since langchain-openai==1.1.6
release(openai): 1.1.7 (#34640)
fix(openai): raise proper exception OpenAIRefusalError on structured output refusal (#34619)
fix: handle empty assistant content in Responses API (#34272) (#34296)
fix(core): serialization patch (#34455)
fix(openai): handle function_call content in token counting (#34379)
fix(openai): filter function_call blocks in token counting (#34396)
Changes since langchain==1.2.0
release(langchain): 1.2.1 (#34622)
fix(core,langchain): use get_buffer_string for message summarization (#34607)
chore(langchain): fix types in test_model_fallback (#34615)
chore(langchain): fix types in test_pii (#34617)
chore(langchain): add admonition around redaction_rules (#34618)
chore(langchain): fix types in test_composition (#34580)
chore(langchain): fix types in test_decorators (#34583)
chore(langchain): fix types in test_wrap_tool_call (#34600)
chore(langchain): fix types in test_model_call_limit_types (#34601)
chore(langchain): fix types in test_file_search and test_human_in_the_loop (#34602)
fix(core): exclude injected args from tool schema (#34582)
chore(langchain): fix types in test_diagram and test_sync_async_wrappers (#34591)
style(langchain): add ruff rule PLC0415 (#34559)
fix(langchain): resolve race condition in ShellSession.execute() (#34535)
fix(infra): use langchain_v1 for dev container deps (#34534)
chore(deps): bump mypy to v1.19 and ruff to v1.14 (#34521)
fix(langchain-classic): pass default to config.getoption (#34034)
style(langchain): add ruff rule RUF012 (#34497)
refactor(langchain): refactor optional imports logic (#32813)
style: add ruff ISC001 rule (#34493)
style(langchain): add TC ruff rules (#34496)
style(langchain): fix some ruff preview rules (#34504)
style(langchain): fix some PLC0415 rules (#34475)
style(langchain): add ruff rules PT (#34434)
feat(langchain): enhance init_chat_model with improved validation (#34226)
docs(langchain): Docstring improved to show Streaming custom events (#34353)
feat(langchain): Add support to google_genai provider in init_embeddings (#34388)
release(core): 1.2.3 (#34421)
release(openai): 1.1.6: update max input tokens for gpt-5 series (#34419)
release(openai): 1.1.5 (#34409)
feat(infra): add CI check for out of date lockfiles (#34397)
Changes since langchain-anthropic==1.3.0
fix(anthropic): fix version (#34606) release(anthropic): 1.3.1 (#34605) fix(anthropic): CVE-2025-68664 (#34563) fix(anthropic): skip cache_control for code_execution blocks (#34579) fix(core): serialization patch (#34455) release(anthropic): 1.3.1 (#34337) fix(anthropic): prevent crash with cache_control and empty message content (#34025)
Changes since langchain-xai==1.2.0
release(xai): 1.2.1 (#34604) fix(xai): count reasoning tokens in output total (#34603)
Changes since langchain-core==1.2.5
release(core): 1.2.6 (#34586)
chore(core): Update LangChainTracer to use Pydantic v2 methods (#34541)
docs(core): add docstrings to internal helper functions (#34525)
docs(core): refresh content.py docstrings (#34546)
chore(deps): bump mypy to v1.19 and ruff to v1.14 (#34521)
refactor(core): fix some missing generic types (#31658)
style(core): add ruff RUF012 rule (#34492)
fix(core): support (message class, template) tuples in ChatPromptTemplate.from_messages (#33989)
test(core): add regression test for list-index $ref resolution (#34097)
fix(core): fix callback manager merge mixing handlers (#32028) (#33617)
style: add ruff ISC001 rule (#34493)
style(core): fix mypy no-any-return violations (#34204)
docs(core): image url docstring enhancement (#34488)
test(core): URL-encode bgColor parameter in mermaid.ink API calls (#34466)
style(core): fix some noqa: ARG rules (#34437)
fix(core): URL-encode bgColor in mermaid API calls (#34461)
perf(core): move origin type map to module level in function_calling.py (#34481)
style(core): add ruff rules TC (#34476)
perf(core): precompile hex color regex pattern at module level (#34480)
docs(core): update to indicate betas (#34457)
Changes since langchain-xai==1.1.0
fix(xai): ensure citations are streamed just once (#34556) release(xai): 1.2.0 (#34555) fix(xai): stream usage metadata by default (#34531) fix(core): serialization patch (#34455) fix(openai): filter function_call blocks in token counting (#34396) release(openai): 1.1.6: update max input tokens for gpt-5 series (#34419) release(openai): 1.1.5 (#34409) fix(openai): rely on langchain-core for setting chunk_position (#34404) chore: update core dep in lockfiles (#34216)
Changes since langchain-tests==1.1.1
release(standard-tests): 1.1.2 (#34507) style(text-splitters,standard-tests,cli): add ruff TC and RUF012 rules (#34495) style: add ruff ISC001 rule (#34493) fix(core): serialization patch (#34455)
Changes since langchain-classic==1.0.0
release(langchain-classic): 1.0.1 (#34467)
fix(core): serialization patch (#34455)
feat(langchain): enhance init_chat_model with improved validation (#34226)
feat(langchain): Add support to google_genai provider in init_embeddings (#34388)
docs: Fix typo in Zapier NLA API description (#34424)
release(core): 1.2.3 (#34421)
release(openai): 1.1.6: update max input tokens for gpt-5 series (#34419)
release(openai): 1.1.5 (#34409)
feat(infra): add CI check for out of date lockfiles (#34397)
fix(huggingface): Helper logic for init_chat_model with HuggingFace backend (#34259)
feat(core,anthropic): extras on BaseTool (#34120)
feat(anthropic): add effort support (#34116)
feat: Use uuid7 for run ids (#34172)
chore: disable blockbuster for langchain-classic (#34186)
style(core,langchain,qdrant): fix some docstrings for refs (#34105)
fix(core): Decouple provider prefix from model name in init_chat_mode… (#34046)
style(core,langchain-classic,openai): fix griffe warnings (#34074)
chore(docs): fix a few refs syntax errors (#34044)
chore: update README.md files (#33919)
chore(langchain): pass on reference docstrings (middleware) (#33904)
docs(langchain): correct IBM provider link in chat_models docstring (#33897)
refactor(langchain): use create_importer for HypotheticalDocumentEmbedder (#32078)
docs: fix typos in libs/langchain/langchain_classic/chains/summarize/chain.py (#33877)
style: some cleanup (#33857)
chore: attribute package change versions (#33854)
fix(langchain): remove Tigris (#33829)
chore: correct langchain-community references (#33827)
style: refs pass (#33813)
style: misc refs work (#33771)
chore: use model IDs, latest anthropic models (#33747)
chore(langchain): fix lint_imports paths (#33749)
style: more refs fixes (#33730)
style(core): more cleanup all around (#33711)
style: more refs work (#33707)
fix: links (#33691)
docs(langchain): clarify create_tool_calling_agent system_prompt formatting and add troubleshooting (#33679)
fix: update some links (#33686)
fix(langchain): correctly initialize huggingface models in init_chat_model (#33167)
style: even more refs work (#33619)
style: more refs polishing (#33601)
Changes since langchain-core==0.3.80
release(core): 0.3.81 (#34459) fix(core): serialization patch (#34458)
Changes since langchain-core==1.2.4
release(core): 1.2.5 (#34456)
fix(core): serialization patch (#34455)
fix(core): RunnablePick method return types (#34208)
fix(core): preserve Field(description=...) in @tool decorator (#34354)
fix(core): populate default args from tool's args_schema (#34399)
fix(core): use tool_calls instead of deprecated function_call in get_buffer_string (#34355)
feat(core): add PEP 702 __deprecated__ attribute support to @deprecated (#34257)
fix(core): ensure tool_call_count is never null (#34431)
feat(core): automatically count and store meta for tool call count (#33756)
feat(core): add 'approximate' alias in place of count_tokens_approximately (#33045)
chore(core): fix some ruff preview rules (#34425)
Changes since langchain-core==1.2.3
release(core): 1.2.4 (#34429)
feat(core): add usage_metadata to metadata in LangChainTracer (#34414)
fix(core): defer persisting traces for iterator inputs (#34416)
chore(core): fix some docstrings (#34426)
Changes since langchain-core==1.2.2
release(core): 1.2.3 (#34421) fix(core): allow unknown blocks in convert_to_openai_messages (#34420) feat(infra): add CI check for out of date lockfiles (#34397)
Changes since langchain-openai==1.1.5
release(openai): 1.1.6: update max input tokens for gpt-5 series (#34419)
Changes since langchain-openai==1.1.4
release(openai): 1.1.5 (#34409) fix(openai): rely on langchain-core for setting chunk_position (#34404)
Changes since langchain-tests==1.1.0
release(standard-tests): 1.1.1 (#34393) docs(standard-tests): throw more descriptive errors for some streaming cases (#34389)
Changes since langchain-core==1.2.1
chore(core): bump lockfile (#34392)
release(core): 1.2.2 (#34391)
fix(core): use get_type_hints for Python 3.14 TypedDict compatibility (#34390)
Changes since langchain-openai==1.1.3
release(openai): 1.1.4 (#34395) revert(openai): switch model from nano to mini when using flex (#34394) fix(openai): Correct hyperlinks in documentation of function with_structured_output (#34385)
Changes since langchain==1.1.3
release(langchain): 1.2 (#34373)
fix(langchain): shell output multithreading race condition (#34333)
refactor(standard-tests): improve VCR config (#33968)
fix(huggingface): Helper logic for init_chat_model with HuggingFace backend (#34259)
chore(langchain): cleanup ruff config (#32810)
fix: little lint thing (#34310)
chore(langchain): check agents integration tests with mypy (#34308)
fix(langchain): add sentinel value to ProviderStrategy / strict (#34290)
chore(langchain): add end to end test for strict mode in provider strategy (#34289)
feat(langchain,openai): add strict flag to ProviderStrategy structured output (#34149)
feat(core,anthropic): extras on BaseTool (#34120)
Changes since langchain-core==1.2.0
release(core): 1.2.1 (#34370) fix(core): handle None arguments in parse_tool_call (#34242) chore(core): fix some types related to ToolCallChunk (#34283)