What's Changed
* Initial Streamlit callback integration doc (md) by sfc-gh-jcarroll in https://github.com/hwchase17/langchain/pull/6788
* Zapier update oauth support by ralewis85 in https://github.com/hwchase17/langchain/pull/6780
* feat (documents): add a source code loader based on AST manipulation by cristobalcl in https://github.com/hwchase17/langchain/pull/6486
* Added missing attribute value object by 3coins in https://github.com/hwchase17/langchain/pull/6849
* feat: Add `UnstructuredOrgModeLoader` by MthwRobinson in https://github.com/hwchase17/langchain/pull/6842
* Zapier - Add better error messaging for 401 responses by ralewis85 in https://github.com/hwchase17/langchain/pull/6840
* Enhancement : Ignore deleted messages and media in WhatsAppChatLoader by augtheo in https://github.com/hwchase17/langchain/pull/6839
* rail_parser: Allow creation from pydantic by irgolic in https://github.com/hwchase17/langchain/pull/6832
* WebBaseLoader: optionally raise exception in the case of http error by mrtj in https://github.com/hwchase17/langchain/pull/6823
* fix pinecone delete bug by IANTHEREAL in https://github.com/hwchase17/langchain/pull/6816
* Adjusted OpenAI cost calculation by neilneuwirth in https://github.com/hwchase17/langchain/pull/6798
* add async to zapier nla tools by mplachter in https://github.com/hwchase17/langchain/pull/6791
* Docs/unstructured api key by MthwRobinson in https://github.com/hwchase17/langchain/pull/6781
* Specify utilities package in SerpAPIWrapper docstring by jung-hunsoo in https://github.com/hwchase17/langchain/pull/6821
* Update to the latest Psychic python library version by Ayan-Bandyopadhyay in https://github.com/hwchase17/langchain/pull/6804
* Web Loader: Add proxy support by timothyasp in https://github.com/hwchase17/langchain/pull/6792
* Create MultiQueryRetriever by rlancemartin in https://github.com/hwchase17/langchain/pull/6833
* Update link in apis.mdx by shashankdeshpande in https://github.com/hwchase17/langchain/pull/6812
* feat: Add streaming only final aiter of agent by ninely in https://github.com/hwchase17/langchain/pull/6274
* feat(document_loaders): add tencent cos directory and file loader by kagawagao in https://github.com/hwchase17/langchain/pull/6401
* feat (documents): add LarkSuite document loader by yaohui-wyh in https://github.com/hwchase17/langchain/pull/6420
* bump version to 218 by hwchase17 in https://github.com/hwchase17/langchain/pull/6857
New Contributors
* sfc-gh-jcarroll made their first contribution in https://github.com/hwchase17/langchain/pull/6788
* ralewis85 made their first contribution in https://github.com/hwchase17/langchain/pull/6780
* cristobalcl made their first contribution in https://github.com/hwchase17/langchain/pull/6486
* neilneuwirth made their first contribution in https://github.com/hwchase17/langchain/pull/6798
* jung-hunsoo made their first contribution in https://github.com/hwchase17/langchain/pull/6821
* shashankdeshpande made their first contribution in https://github.com/hwchase17/langchain/pull/6812
* ninely made their first contribution in https://github.com/hwchase17/langchain/pull/6274
* kagawagao made their first contribution in https://github.com/hwchase17/langchain/pull/6401
* yaohui-wyh made their first contribution in https://github.com/hwchase17/langchain/pull/6420
**Full Changelog**: https://github.com/hwchase17/langchain/compare/v0.0.217...v0.0.218