This release contains important changes for license key verification and sending subscription metrics and operational metadata to LangChain, beta support for Azure Blob Storage, and new features including a new diff view in LangSmith’s prompt hub and support for uploading images, audio, video, and PDF files with LangSmith traces.

Breaking Changes

• LangSmith now verifies license keys and sends subscription metrics plus operational metadata to LangChain, unless configured in offline mode. This requires changes to allow egress to a specific host. For more details see: Egress for Subscription Metrics and Operational Metadata

• To facilitate these changes, LangSmith v0.9 requires a new license key. Your admin point of contact will receive an email notification with a link to a new license key. If you have not received yours, please reach out to support@langchain.dev

New Features since v0.8.0

•  A new diff view in LangSmith’s prompt hub

•  File attachments with example datasets (requires blob storage)

• Organization-level Usage Charts

• OpenTelemetry support

• Annotation rubrics for guided annotation workflows

• 🛝 Saving model configurations in LangSmith's Playground

• Redesigned LangSmith product homepage & resource tags for organization

• Upload images, audio, video, and PDF files with LangSmith traces (requires blob storage)

• Prompt Canvas for streamlined prompt engineering

• Beta Support for Azure Blob Storage

Performance and Reliability Changes

• Improved performance and reliability stats-related queries in Clickhouse

• Support for asynchronous ingest of feedback when submitted via the SDK. For full support, we recommend updating to the latest versions of the LangSmith Python and JavaScript SDKs.

Infrastructure Changes

• As a reminder, default requirements for all resources were increased as of v0.7. Note that you may need to adjust your cluster settings upward. By default we now require the following minimum sizing:

  • 16 vCPU

  • 64GB RAM

  including at least one node that can fit a pod requesting 4 vCPU/16 GB RAM. To override these settings, you can manually configure resources requests/limits.

• Updated bundled Clickhouse version to 24.8

Admin Changes

• No Admin changes in this release.