What's Changed

• Add azure cognitive search retriever by @dev2049 in https://github.com/hwchase17/langchain/pull/4467
• add docs for environment variable by @agola11 in https://github.com/hwchase17/langchain/pull/4477
• Fix: Add run_manager on all AgentFinish returns in AgentExecutor by @kaikun213 in https://github.com/hwchase17/langchain/pull/4466
• Harrison/new search by @hwchase17 in https://github.com/hwchase17/langchain/pull/4359
• Add aleph alpha api key attribute by @dev2049 in https://github.com/hwchase17/langchain/pull/4489
• Refactor test workflow by @eyurtsev in https://github.com/hwchase17/langchain/pull/4457
• Test workflow, fix minor typos by @eyurtsev in https://github.com/hwchase17/langchain/pull/4495
• Update contribution guidelines by @dev2049 in https://github.com/hwchase17/langchain/pull/4431
• Load HuggingFace Tool by @vowelparrot in https://github.com/hwchase17/langchain/pull/4475
• Fix minor issues in self-query retriever prompt formatting by @nomeyer in https://github.com/hwchase17/langchain/pull/4450
• parameterized distance metrics; lint; format; tests by @EandrewJones in https://github.com/hwchase17/langchain/pull/4375
• [Docs]: Add Kinsta to the list of deployment providers by @kristofdombi in https://github.com/hwchase17/langchain/pull/4445
• Add LLMs support for Anyscale Service by @kylehh in https://github.com/hwchase17/langchain/pull/4350
• Callback Handler for MLflow by @akshaya-a in https://github.com/hwchase17/langchain/pull/4150
• Add _type for all parsers by @sunishsheth2009 in https://github.com/hwchase17/langchain/pull/4189
• Release 0.0.166 by @dev2049 in https://github.com/hwchase17/langchain/pull/4510

New Contributors

• @kaikun213 made their first contribution in https://github.com/hwchase17/langchain/pull/4466
• @nomeyer made their first contribution in https://github.com/hwchase17/langchain/pull/4450
• @EandrewJones made their first contribution in https://github.com/hwchase17/langchain/pull/4375
• @kristofdombi made their first contribution in https://github.com/hwchase17/langchain/pull/4445
• @kylehh made their first contribution in https://github.com/hwchase17/langchain/pull/4350
• @akshaya-a made their first contribution in https://github.com/hwchase17/langchain/pull/4150
• @sunishsheth2009 made their first contribution in https://github.com/hwchase17/langchain/pull/4189

Full Changelog: https://github.com/hwchase17/langchain/compare/v0.0.165...v0.0.166