langchain

Changes since langchain-core==0.3.86

chore(infra): merge v1.4 into master (#37350)
chore: bump urllib3 from 2.6.3 to 2.7.0 in /libs/core (#37329)
fix(core): avoid eager pydantic.v1 import in @deprecated (#37308)
chore: bump mistune from 3.1.4 to 3.2.1 in /libs/core (#37237)
chore: bump jupyter-server from 2.17.0 to 2.18.0 in /libs/core (#37204)
release(core): 1.3.3 (#37198)
fix(core): set deprecation since to 1.3.3 to match release (#37200)
fix(core, langchain): harden load() against untrusted manifests (#37197)
chore: bump notebook from 7.5.0 to 7.5.6 in /libs/core (#37109)
chore: bump types-pyyaml from 6.0.12.20250915 to 6.0.12.20260408 in /libs/core (#37129)
fix(core): preserve structured inputs on tool runs in tracers (#37108)
release(perplexity): 1.2.0 (#37091)
chore(docs): update x handle references (#37081)
fix(core): make removal optional in warn_deprecated (#37056)
fix(core): validate batch_size in _batch and _abatch to prevent infinite loop (#36663)
chore(core): mark stream_v2/astream_v2 as beta (#36992)
release(core): 1.3.2 (#36990)
feat(core): add content-block-centric streaming (v2) (#36834)
release(core): 1.3.1 (#36972)
feat(core): allow _format_output to pass through list of ToolOutputMixin instances (#36963)
chore: bump nbconvert from 7.17.0 to 7.17.1 in /libs/core (#36923)
feat(core): Update inheritance behavior for tracer metadata for special keys (#36900)
chore: bump langsmith from 0.7.13 to 0.7.31 in /libs/core (#36813)
release(core): release 1.3.0 (#36851)
release(core): 1.3.0a3 (#36829)
chore(core): keep checkpoint_ns behavior in streaming metadata for backwards compat (#36828)
feat(core): Add chat model and LLM invocation params to traceable metadata (#36771)
fix(core): restore cloud metadata IPs and link-local range in SSRF policy (#36816)
chore(deps): bump pytest to 9.0.3 (#36801)
chore(core): harden private SSRF utilities (#36768)
fix(openai): handle content blocks without type key in responses api conversion (#36725)
chore: bump pytest from 9.0.2 to 9.0.3 in /libs/core (#36719)
release(core): 1.3.0.a2 (#36698)
fix(core): Use reference counting for storing inherited run trees to support garbage collection (#36660)
docs(core): nit (#36685)
release(core): 1.3.0a1 (#36656)
chore(core): reduce streaming metadata / perf (#36588)
release(core): release 1.2.28 (#36614)
fix(core): add more sanitization to templates (#36612)
release(core): 1.2.27 (#36586)
fix(core): handle symlinks in deprecated prompt save path (#36585)
chore: add comment explaining pygments>=2.20.0 (#36570)
release(core): 1.2.26 (#36511)
fix(core): add init validator and serialization mappings for Bedrock models (#34510)
feat(core): add ChatBaseten to serializable mapping (#36510)
chore(core): drop gpt-3.5-turbo from docstrings (#36497)
fix(core): correct parameter names in filter_messages docstring example (#36462)
release(core): 1.2.25 (#36473)
fix(core): harden check for txt files in deprecated prompt loading functions (#36471)
fix(core): fixed typos in the documentation (#36459)
release(core): 1.2.24 (#36434)
feat(core): impute placeholder filenames for OpenAI file inputs (#36433)
chore: pygments>=2.20.0 across all packages (CVE-2026-4539) (#36385)
fix(core): add "computer" to _WellKnownOpenAITools (#36261)
release(core): 1.2.23 (#36323)
revert: Revert "fix(core): trace invocation params in metadata" (#36322)
chore: bump requests from 2.32.5 to 2.33.0 in /libs/core (#36243)
release(core): 1.2.22 (#36201)
fix(core): validate paths in prompt.save and load_prompt, deprecate methods (#36200)
release(core): 1.2.21 (#36179)
fix(core,model-profiles): add missing ModelProfile fields, warn on schema drift (#36129)
chore(core): remove stale blockbuster allowlist for deleted context module (#36168)
ci: suppress pytest streaming output in CI (#36092)
release(core): 1.2.20 (#36085)
fix(core): trace invocation params in metadata (#36080)
feat: Add LangSmith integration metadata to create_agent and init_chat_model (#35810)
feat(core): harden anti-ssrf (#35960)
ci: avoid unnecessary dep installs in lint targets (#36046)
docs(core): document base_url in mermaid api (#35961)
chore: bump orjson from 3.11.5 to 3.11.6 in /libs/core (#35805)
chore: housekeeping (#35850)
release(core): 1.2.19 (#35832)
chore(core): move BaseCrossEncoder to langchain-core (#35809)
chore: bump tornado from 6.5.2 to 6.5.5 in /libs/core (#35775)
release(core): 1.2.18 (#35704)
fix(core): fix double backticks in deprecation docstring for alternative_import (#35658)
fix(core): preserve default_factory when generating tool call schema (#35550)
feat(openai): support tool search (#35582)
chore: bump the minor-and-patch group across 3 directories with 7 updates (#35605)
release(core): 1.2.17 (#35527)
fix(core): extract usage metadata from serialized tracer message outputs (#35526)
chore: bump the langchain-deps group across 3 directories with 7 updates (#35513)
chore: bump the langchain-deps group across 3 directories with 14 updates (#35441)
release(core): 1.2.16 (#35439)
fix(core): treat empty tool chunk ids as missing in merge (#35414)
fix(core): improve error message for non-JSON-serializable tool schemas (#34376)
fix(core): improve typing/docs for on_chat_model_start to clarify required positional args (#35324)
perf(core): defer specific langsmith imports to reduce import time (#35298)
revert: add ChatAnthropicBedrockWrapper (#35371)
release(core): 1.2.15 (#35367)
fix(anthropic): replace retired model IDs in tests and docstrings (#35365)
feat(anthropic): add ChatAnthropicBedrock wrapper (#35091)
style: fix some ruff noqa (#35321)
release(core): 1.2.14 (#35328)
chore(core): remove langserve from sys info util, add deepagents (#35325)
fix(core): fix merge_lists incorrectly merging parallel tool calls (#35281)
fix(core): accept int temperature in _get_ls_params for LangSmith tracing (#35302)
revert: accept integer temperature values in _get_ls_params (#35319)
fix(core): accept integer temperature values in _get_ls_params (#35317)
docs(core): update load note to be precise (#35309)
fix(core): prevent recursion error when args_schema is dict (#35260)
fix(core): preserve index and timestamp fields when merging (#34731)
docs(core): add security warnings and best practices for deserialization (#35282)
docs: fix docstring inaccuracies and update outdated LangSmith URLs (#35283)
fix(core): correct misleading jinja2 sandboxing comment (#35183)
chore: bump the langchain-deps group across 3 directories with 8 updates (#35257)
release(core): 1.2.13 (#35230)
docs(core): expanded get_lc_namespace docstring (#35229)
feat(openrouter): add langchain-openrouter provider package (#35211)
style: bump ruff version to 0.15 (#35042)
release(core): 1.2.12 (#35192)
fix(core): fix setting ChatGeneration.text (#35191)
release(core): 1.2.11 (#35144)
fix(openai): sanitize urls when counting tokens in images (#35143)
chore(core): clean up docstring mismatch and redundant logic in langchain-core (#35064)
fix(core): replace bare except with Exception in tracer (#35138)
release(core): 1.2.10 (#35136)
chore(deps): bump the langchain-deps group across 3 directories with 40 updates (#35129)
chore(deps): bump the langchain-deps group across 3 directories with 11 updates (#35121)
feat(core): add ContextOverflowError, raise in anthropic and openai (#35099)
feat(model-profiles): add text_inputs and text_outputs (#35084)
feat(core): count tokens from tool schemas in count_tokens_approximately (#35098)
docs(core): add missing name docstring for RunnableSerializable (#35088)
release(core): 1.2.9 (#35025)
fix(core): adjust cap when scaling approximate token counts (#35017)
revert: precompile hex color regex pattern at module level (#35016)
chore: add make type target (#35015)
revert: "chore: add typing target in Makefile" (#35013)
chore: add typing target in Makefile (#35012)
fix(core): apply cap when scaling approximate token counts (#35005)
feat(core): allow scaling by reported usage when counting tokens approximately (#34996)
test(core): increase delta_time for flaky test (#34982)
chore: enrich pyproject.toml files (#34980)
release(core): 1.2.8 (#34975)
docs(core): add examples for pretty_repr, pretty_print (#34968)
docs(core): use proper admonition for get_buffer_string (#34967)
docs: add usage examples to core classes (#34841)
chore(core): fix docstring format (#34966)
chore(deps): bump the uv group across 20 directories with 3 updates (#34941)
docs: add example to create_message function docstring (#34851)
docs(core): clarify @tool decorator argument and return type requirements (#34860)
fix(core): fix nested mustache variable extraction and update docs (#34872)
fix(core): allow base model annotations for empty model (#34932)
chore: upgrade urllib3 to 2.6.3 (#34940)
fix(core): prevent crash in ParrotFakeChatModel when messages list is empty (#34943)
fix(core): google docstring parsing with no arguments/reserved arguments (#34861)
test(core): add tests for approximate token counting with multimodal messages (#34898)
fix(core): replace Iterable with Iterator for block iteration (#34934)
fix(core): yield_blobs returns Iterator (#34935)
docs: Fix typo in Runnable description of async variants (#34905)
fix(core): raise outputparserexception for unknown tools (#34923)
docs(core): nit (#34914)
chore(core): nits (#34897)
feat(core): add multimodal support to count_tokens_approximately (#34883)
fix(core): fix typo 'use a a' -> 'use as a' in check_version.py (#34878)
style(core): lint (#34862)
feat(core): add XML format option for get_buffer_string (#34802)
chore(core): relax packaging constraints (#34832)
chore(deps-dev): bump setuptools from 67.8.0 to 78.1.1 in /libs/core in the uv group across 1 directory (#34825)
chore(core, langchain): add version consistency check pre-commit hooks (#34782)
docs(core): enhance docstring for RunnableConfig for clarity on total=False (#34756)
docs(core): clean up callbacks param descriptions (#34738)
fix(core): correctly guard against non-text-block types (#34729)
chore: update twitter URLs (#34736)
refactor(core): generalize comma_list utility to support any Iterable (#34714)
fix(core): add explicit tags parameter to sync LLMManagerMixin methods (#34722)
docs(core): enhance docstrings for ToolCall and ToolCallChunk (#34719)
fix(core): add tool_call_id to on_tool_error event data (#33731)
fix(core): improve error message for missing title in JSON schema functions (#34683)
fix(core): make yield_keys prefix keyword-only to match BaseStore (#34659)
chore(core): bump lock (#34695)
chore(core): improve types for RunnableLambda (#34539)
chore(core): improve types for StreamingRunnable (#34540)
style(core): fix some noqa escapes (#34675)
style: bump ruff version to 0.14.11 (#34674)
fix: remove relative imports (#34680)
release: langchain-core 1.2.7 (#34678)
fix: don't trace injected args only found in signature (#34670)
feat(core): add more file extensions to ignore in HTML link extraction (#34552)
refactor(core): improve docstrings for HTML link extraction utilities (#34550)
test(core): add edge case for empty examples in LengthBasedExampleSelector (#34641)
fix(core): fix strict schema generation for functions with optional args (#34599)
feat(core): support custom message separator in get_buffer_string() (#34569)
refactor(core): add warning for fallback GPT-2 tokenizer usage (#34621)
fix(core,langchain): use get_buffer_string for message summarization (#34607)
test(core): add tests for formatting utils and merge functions (#34511)
fix(core): strip message IDs from cache keys using model_copy (#33915)
fix(core): exclude injected args from tool schema (#34582)
refactor(core): select chunk_id via ranking and remove extra allocation (#34588)
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)
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)
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)
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)
chore(core): bump lockfile (#34392)
release(core): 1.2.2 (#34391)
fix(core): use get_type_hints for Python 3.14 TypedDict compatibility (#34390)
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)
release(core): 1.2 (#34319)
style(core): docs nit (#34312)
fix(core): widen openai tool/function conversion input type to Mapping (#34304)
chore(core): add admonitions around use of load (#34285)
feat(core,anthropic): extras on BaseTool (#34120)
release: langchain-core 1.1.3 (#34266)
fix(core): undo jinja2 restrictions (#34072)
fix: remove partial usage for retriever func + afunc (#34265)
release(core): 1.1.2 (#34253)
fix(core): pass tool_call_id to on_tool_start callback (#34235)
chore(core): improve typing of messages utils functions (#34225)
fix(core): prevent async task garbage collection (RUF006) (#34238)
chore(core): use anext and deprecate py_anext (#34211)
feat(core): support google maps grounding in genai block translator (#34244)
docs(core,groq,openai): nits for ref docs (#34243)
docs(core): improve style for refs (#34227)
docs(core): update StrOutputParser docstring (#34213)
release: langchain-core 1.1.1 (#34212)
feat: Use uuid7 for run ids (#34172)
fix: tool call id bug introduced w/ runtime injection (#34185)
chore: update test to be compatible with mem-optimized runtree (#34176)
docs(core): update docstrings in RunnableConfig, dereference_refs (#34131)
docs(anthropic,core,langchain): updates (#34106)
style(core,langchain,qdrant): fix some docstrings for refs (#34105)
fix(core): handle missing StructuredPrompt schema (#34096)
fix(core): ensure_ascii=False in PydanticOutputParser exception formatting (#34006)
fix(infra,core): nits (#34079)
style(core,langchain-classic,openai): fix griffe warnings (#34074)
chore(docs): fix a few refs syntax errors (#34044)
release(core): 1.1.0 (#34063)
feat(model-profiles): distribute data across packages (#34024)
release(core): 1.0.7 (#34036)
fix(core): fix validation for input variables in f-string templates, restrict functionality supported by jinja2, mustache templates (#34035)
release: langchain-core 1.0.6 (#34018)
chore: Support tool runtime injection when custom args schema is prov… (#33999)
feat(core): add proxy support for mermaid png rendering (#32400)
release(core): 1.0.5 (#33973)
fix(core): don't mask exceptions (#33959)
docs(core): add clarity to base token counting methods (#33958)
chore(core,infra): nits (#33954)
chore(core): fix some ruff TC rules (#33929)
chore: update README.md files (#33919)
test(core): add comprehensive tests for groq block translator (#33906)
revert(core): "applied secrets_map in load to plain string values" (#33913)
fix(core): applied secrets_map in load to plain string values (#33678)
release(core): 1.0.4 (#33886)
feat(core): support draw subgraph using pygraphviz (#32966)
fix(core): Fix tool name check in name_dict for PydanticToolsParser (#33479)
fix(core): Filter empty content blocks from formatted prompts (#32519)
fix(core): context preservation in shielded async callbacks (#32163)
fix(core): RunnablePick may not return a dict if keys is a string (#31321)
fix(core): fix Runnable parallel schema being empty when children runnable input schemas use TypedDict (#28196)
docs: fix typos in libs/core/langchain_core/utils/function_calling.py (#33873)
docs: fix typos in libs/core/tests/unit_tests/utils/test_strings.py (#33875)
docs: fix typos in libs/core/tests/unit_tests/indexing/test_hashed_document.py (#33874)
docs: fix typos in libs/core/tests/unit_tests/test_tools.py (#33876)
docs: fix typos in some files (#33867)
style: some cleanup (#33857)
chore: attribute package change versions (#33854)
fix(core): handle missing dependency version information (#33844)
chore: correct langchain-community references (#33827)
chore(core): add ruff rule PLR2004 (#33706)
chore(core): clean pyproject formatting (#33821)
docs(model-profiles): fix typo (#33820)
style: refs pass (#33813)
fix(core): add no colors check (#33780)
release(core): 1.0.3 (#33768)
style: misc refs work (#33771)
docs(core): improve tools module docstrings (#33755)
feat(core): mint langchain-model-profiles and add profile property to BaseChatModel (#33728)
chore: use model IDs, latest anthropic models (#33747)
release: core 1.0.2 and langchain 1.0.3 (#33736)
fix: filter out injected args from tracing (#33729)
style: more refs fixes (#33730)
fix(core): improve JSON get_format_instructions using Opik Agent Optimizer (#33718)
style(core): more cleanup all around (#33711)
style: more refs work (#33707)
fix(core): translate Google GenAI text blocks to v1 (#33699)
feat(langchain): export UsageMetadata (#33692)
fix: links (#33691)
fix(core): fix PydanticOutputParser's get_format_instructions for v1 models (#32479)
refactor(core): Minor refactor for code readability (#33674)
fix(infra): add emacs backup files to gitignore (#33675)
fix: update some links (#33686)
style(core): more refs work (#33664)
fix(core): make handling of schemas more defensive (#33660)
release(core): 1.0.1 (#33639)
feat(core): automatic set required to include all properties in strict mode (#32930)
docs(core): Updated docs for mustache_template_vars (#33481)
style: even more refs work (#33619)
style: more refs work (#33616)
style: more refs polishing (#33601)
ci(infra): test CodSpeed with Python 3.13 (#33599)
style(anthropic): use aliases for model names (#33590)
chore: update pyproject.toml url entries (#33587)
release(core): 1.0.0 (#33562)
fix(core): support for Python 3.14 (#33461)
docs: more fixes for refs (#33554)
release: joint rcs for core + langchain (#33549)
chore(langchain): allow injection of ToolRuntime and generic ToolRuntime[ContextT, StateT] (#33546)
chore: more sweeping (#33533)
release(core): 1.0.0rc2 (#33530)
docs(anthropic): update extended thinking docs and fix urls (#33525)
feat(core): support vertexai standard content (#33521)
style: more sweeping refs work (#33513)
style: more work for refs (#33508)
feat(core): include original block type in server tool results for google-genai (#33502)
release(core): 1.0.0rc1 (#33497)
chore(core): delete BaseMemory, move to langchain-classic (#33373)
docs: update package READMEs (#33488)
fix(core): propagate extras when aggregating tool calls in v1 content (#33494)
chore(core): delete items marked for removal in schemas.py (#33375)
fix(docs): Fix several typos and grammar (#33487)
chore(core): delete function_calling.py utils marked for removal (#33376)
chore(core): delete pydantic_v1/ (#33374)
feat(groq): support built-in tools in message content (#33459)
chore(core): delete get_relevant_documents (#33378)
style: llm -> model (#33423)
chore(langchain): remove arg types from docstrings (#33413)
style: fix tables, capitalization (#33417)
fix(core): handle parent/child mustache vars (#33345)
style: remove Defaults to None (#33404)
style: .. code-block:: admonition translations (#33400)
style: address Sphinx double-backtick snippet syntax (#33389)
chore(core): remove arg types from docstrings (#33388)
chore: update Sphinx links to markdown (#33386)
fix(core): override streaming callback if streaming attribute is set (#33351)
refactor(core): clean up sys_info.py (#33372)
style: remove more Optional syntax (#33371)
chore: drop UP045 (#33362)
refactor(core): remove keep-runtime-typing from pyproject.toml following dropping 3.9 (#33360)
style: monorepo pass for refs (#33359)
fix(core): don't print package if no version found (#33347)
chore: enrich pyproject.toml files with links to new references, others (#33343)
release(core): 1.0.0a8 (#33341)
fix(core): add back add_user_message and add_ai_message (#33340)
release(core): 1.0.0a7 (#33309)
fix(core,openai,anthropic): delegate to core implementation on invoke when streaming=True (#33308)
fix(core): fix string content when streaming output_version="v1" (#33261)
chore(infra): pdm -> hatchling (#33289)
style(core): drop python 39 linting target for 3.10 (#33286)
chore(core): docstring nits (#33285)
chore(core,langchain,langchain_v1)!: remove globals from langchain-v1, update globals in langchain-classic, langchain-core (#33251)
feat(core): add optional include_id param to convert_to_openai_messages function (#33242)
chore: delete deprecated items (#33192)
docs: v1 docs updates (#33173)
release: v1.0.0 (#32567)