Slack alerts native; Engine enablement unified; Git and GCS mounts for sandboxes

Observability and evaluations

Automations

• Automations now let you control trace retention per action, so traces matched by a rule can stay at base retention instead of being upgraded.

Engine

• The Engine issue board now shows a Connect GitHub action when GitHub is not connected, so you can set up pull request creation without leaving the board.

• Engine now has a unified enablement screen with access requests, and organization settings consolidate Engine usage and limits in one place.

• Organization admins now receive Engine spend emails when spend crosses each configured threshold, and pausing or disabling Engine now asks for confirmation.

Datasets and experiments

• Experiments now show live loading progress in the header and the Progress column, so you can track completed and evaluated runs in real time.

• Evaluators now include a trace-retention toggle in the advanced options, so scored traces can stay at base retention when that fits your workflow.

• Evaluator prompt editing now offers an advanced mode for editing Mustache templates directly with separate variable mappings.

• You can now apply resource tags when creating a dataset, including from scratch, file upload, or a clone.

• Auto-attached Assertions evaluators now read assertions from the reference output, so experiment scores reflect actual pass and fail results.

Prompts and playground

• OAuth client credentials now support per-workspace setup on model configurations, so workspace admins can self-serve OAuth on saved prompts and models.

• The Playground now exposes a Reasoning Summary option for OpenAI reasoning models on the Responses API.

• The model dropdown no longer suggests OpenAI models for an OpenAI Compatible Endpoint, so you can enter your own custom model name.

Tracing

• Trace query syntax now has a full operator reference, field table, and quick examples, so API filtering is easier to discover.

• The OpenTelemetry guide now explains how to link spans to an existing LangSmith SDK trace and what happens when a parent span never arrives, so cross-process traces are easier to debug.

Monitoring and alerting

• Dashboards now include a chart builder with chart templates, a create and edit pane, and brush and series controls on time series charts.

• You can now send alerts to Slack as a native notification target and connect or disconnect the Slack app from the UI.

Deployment

• Preview deployments now build the image for the preview commit instead of reusing the parent deployment’s image.

Sandboxes

• Sandbox auth proxy now documents GCP rules and service-account handling, so Google API access through the proxy is clearer.

• Sandboxes now marks AWS US SaaS availability as generally available, so the region table reflects the current rollout.

• Sandboxes now support Git mounts and Google Cloud Storage bucket mounts.

Admin and billing

Administration

• Organization settings now clarify that SSO/SCIM group names can omit spaces, so enterprise IdPs that disallow spaces still work cleanly.

• The Vanta MCP integration is now generally available to all workspaces.

• Applying tags when creating datasets, prompts, and projects is now governed by dedicated tag-on-create permissions.

LLM Gateway

• The LLM gateway now supports native Gemini routes for Vertex AI and the OpenAI embeddings endpoint.

• Gateway guard policies now accept a granular PII configuration and a configurable timeout action.

Usage and billing

• Granular billable usage now clarifies org scoping, so you can interpret usage totals more accurately.