langchain-core

Extras are now propagated on content-block-start events.

1.6.12release notes

Hardens handling around inspect.signature for Python 3.14.

1.6.7release notes

Includes OpenAI redacted_content in v1 output for Bedrock Converse.

1.6.7release notes

Adds compatibility with Claude Sonnet 5.5 for developers using the Anthropic integration.

1.6.6release notes

Long tool IDs are abbreviated in XML buffer strings.

1.6.5release notes

Avoids mutation in Bedrock Converse standard content.

1.6.2release notes

Avoids mutation in Google GenAI standard content.

1.6.2release notes

Indexing in genai v1 streaming content was fixed.

1.6.1release notes

StructuredTool was made JSON-serializable.

1.6.1release notes

Chain-group runs are finalized when a BaseException is raised.

1.6.0release notes

RunnablePick instances can now be deserialized.

1.6.0release notes

Postponed annotations are resolved when determining injected argument keys.

1.6.0release notes

Now handles None and zero sizes consistently with batch_iterate.

1.5.5release notes

Fixes issues in merging chunks.

1.5.5release notes

Preserves non-string, non-dictionary items in list values.

1.5.5release notes

Fixes handling of tool descriptions when infer_schema is false.

1.5.5release notes

Handles falsy LLM and chat model caches.

1.5.5release notes

Validation now respects Pydantic aliases for tool inputs.

1.5.5release notes

Clears the callback when an exception occurs in the context manager.

1.5.5release notes

Handles v1 base model validation in the async path.

1.5.5release notes

Injected arguments are handled for subclasses of BaseTool.

1.5.4release notes

filter_args respects include_injected=False.

1.5.4release notes

OpenAI file blocks are preserved.

1.5.4release notes

Compatibility with pydantic 2.14 was fixed.

1.5.4release notes

Runables using RootModel preserve a flat tool args schema.

1.5.4release notes

Streaming tracers close event loops they create internally.

1.5.4release notes

StructuredPrompt no longer mutates caller kwargs.

1.5.4release notes

Text stream projections have corrected types.

1.5.4release notes

The gateway now falls back to LANGSMITH_API_KEY for authentication.

1.5.3release notes

Handles empty strings in gateway environment variables.

1.5.2release notes

Uses the tool_call_schema cache for BaseTool token counting.

1.5.1release notes

Uses asyncio.get_running_loop() in async contexts.

1.4.9release notes

Improved error messages from LangSmith loaders, making loader failures clearer to developers.

1.4.9release notes

Fixed handling of continuation lines containing colons when parsing Google-style docstrings.

1.4.9release notes

Added messages to bare raise ValueError calls, making these errors more informative.

1.4.9release notes

Fixed bugs in XML and Pydantic output parsers.

1.4.9release notes

Preserves usage token details in v3 streaming events.

1.4.8release notes

The package version trace metadata was renamed.

1.4.7release notes

Pydantic v1 support in tools/runnable was fixed.

1.4.7release notes

Normalize v1 streamed tool calls.

1.4.6release notes

Fixes the async tracer fallback for on_chat_model_start when called in a sync context.

1.4.5release notes

Tightens structured output model fallbacks.

1.4.5release notes

The output type of structured tool error handlers is fixed.

1.4.4release notes

Accepts the Serializable constructor-envelope wire shape.

1.4.1release notes

Removes Bedrock prevalidation from load.

1.4.1release notes

Preserves reasoning blocks alongside tool_call in the v3 stream.

1.4.1release notes

Preserves chunk additional_kwargs across v3 stream assembly.

1.4.1release notes

Adds add_user_message and add_ai_message back.

1.4.0release notes

Avoids eagerly importing pydantic.v1 when using the deprecated decorator.

1.4.0release notes

Fixes string content when streaming with output_version="v1".

1.4.0release notes

Adds support for Python 3.14, including TypedDict compatibility using get_type_hints.

1.4.0release notes

Delegates to the core implementation on invoke when streaming=True.

1.4.0release notes

Includes tool_call_id in on_tool_error event data and passes it to on_tool_start callbacks.

1.4.0release notes

Validates batch_size in _batch and _abatch to prevent an infinite loop.

1.3.3release notesrelease notes

Preserves structured inputs on tool runs in tracers.

1.3.3release notesrelease notes

Makes the removal argument optional.

1.3.3release notesrelease notes

Handles response content blocks that lack a type key during conversion.

1.3.0release notes

Restores cloud metadata IPs and the link-local range in the SSRF policy.

1.3.0release notesrelease notes

Handles symlinks in the deprecated prompt save path.

1.2.27release notesrelease notes

Adds an initialization validator and serialization mappings for Bedrock models.

1.2.26release notes

Adds computer to the set of well-known OpenAI tools.

1.2.24release notesrelease notes

Adds missing ModelProfile fields and warns on schema drift.

1.2.21release notesrelease notes

Invocation parameters are now traced in metadata.

1.2.20release notes

Tool call schema generation now preserves default_factory.

1.2.18release notes

Usage metadata is now extracted from serialized tracer message outputs.

1.2.17release notes

Empty tool chunk IDs are treated as missing during merge.

1.2.16release notes

Typing and documentation clarify that on_chat_model_start requires positional arguments.

1.2.15release notes

Error messages for non-JSON-serializable tool schemas are improved, making these failures easier to understand.

1.2.15release notes

Prevents a recursion error when args_schema is a dict.

1.2.14release notes

Accepts integer temperature values for LangSmith tracing.

1.2.14release notes

Fixes incorrect merging of parallel tool calls.

1.2.14release notesrelease notes

Preserves index and timestamp fields when merging.

1.2.14release notes

Fixes setting ChatGeneration.text.

1.2.12release notes

The tracer now catches Exception instead of using a bare except.

1.2.11release notes

The cap is applied and adjusted when scaling approximate token counts.

1.2.9release notes

Base model annotations are allowed for an empty model.

1.2.8release notes

Block iteration uses Iterator instead of Iterable.

1.2.8release notes

Fixes parsing when docstrings have no arguments or reserved arguments.

1.2.8release notes

Improves the error message when a title is missing.

1.2.8release notes

Nested Mustache variable extraction is fixed.

1.2.8release notes

Correctly guards against non-text-block types.

1.2.8release notes

The event data now includes tool_call_id.

1.2.8release notes

Prevents a crash when the messages list is empty.

1.2.8release notes

The return type is Iterator.

1.2.8release notes

Injected arguments found only in a tool signature are no longer traced.

1.2.7release notes

Injected arguments are excluded from tool schemas.

1.2.7release notes

Message IDs are stripped from cache keys using model_copy.

1.2.7release notes

Strict schema generation is fixed for functions with optional arguments.

1.2.7release notes

URL-encodes the bgColor parameter in mermaid API calls.

1.2.6release notes

Fixes callback manager merging that mixed handlers.

1.2.6release notes

Default arguments are populated from a tool's args_schema.

1.2.5release notes

Uses tool_calls instead of the deprecated function_call when formatting messages.

1.2.5release notesrelease notes

The return types of RunnablePick methods were fixed.

1.2.5release notes

A serialization issue was fixed.

1.2.5release notes

The decorator now preserves descriptions supplied through Field(description=...).

1.2.5release notes

tool_call_count is ensured to never be null.

1.2.5release notes

Trace persistence is deferred for iterator inputs.

0.3.82, 1.2.4release notesrelease notes

Allows unknown blocks in convert_to_openai_messages.

1.2.3release notes

Uses get_type_hints for Python 3.14 TypedDict compatibility.

1.2.2release notes

Handles None arguments in parse_tool_call.

1.2.1release notes

The conversion input type was widened to Mapping, allowing mapping inputs.

1.2.0release notes

Jinja2 restrictions were undone, changing the restrictions applied when using Jinja2.

1.1.3release notes

Prevents async tasks from being garbage-collected.

1.1.2release notes

The callback now receives tool_call_id.

1.1.2release notes

Uses ensure_ascii=False when formatting exceptions.

1.1.1release notes

Handles a missing schema for StructuredPrompt.

1.1.1release notes

Fixes a tool call ID bug introduced with runtime injection.

1.1.1release notes

Exceptions are no longer masked, so callers can observe the original exception.

1.0.5release notes

Empty content blocks are filtered from formatted prompts.

1.0.4release notes

Fixes tool name checking in name_dict.

1.0.4release notes

Fixes empty parallel schemas when child runnable input schemas use TypedDict.

1.0.4release notes

Fixes the case where RunnablePick may not return a dict when keys is a string.

1.0.4release notes

Preserves context in shielded async callbacks.

1.0.4release notes

JSON get_format_instructions is improved using Opik Agent Optimizer.

1.0.2release notes

PydanticOutputParser format instructions are fixed for v1 models.

1.0.2release notes

Google GenAI text blocks are translated to v1.

1.0.2release notes

Injected arguments are filtered out from tracing.

1.0.2release notes

Schema handling is more defensive.

1.0.1release notes

A serialization patch was included; the notes do not specify further details.

0.3.81release notes