> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-mdrxyd-1782275112-9320b02.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# LangSmith Cloud changelog
> Weekly updates to LangSmith Cloud
Weekly updates to [LangSmith Cloud](/langsmith/observability) and [LangSmith Fleet](/langsmith/fleet).
**Subscribe**: This changelog includes an [RSS feed](https://docs.langchain.com/langsmith/product-changelog/rss.xml) that can integrate with [Slack](https://slack.com/help/articles/218688467-Add-RSS-feeds-to-Slack), [email](https://zapier.com/apps/email/integrations/rss/1441/send-new-rss-feed-entries-via-email), Discord bots like [Readybot](https://readybot.io/) or [RSS Feeds to Discord Bot](https://rss.app/en/bots/rssfeeds-discord-bot), and other subscription tools.
If you use self-hosted LangSmith, see the [self-hosted changelog](/langsmith/self-hosted-changelog) for updates.
## Observability and evaluations
### Automations
* [Automations](/langsmith/rules) 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](/langsmith/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](/langsmith/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](/langsmith/engine) spend emails when spend crosses each configured threshold, and pausing or disabling Engine now asks for confirmation.
### Datasets and experiments
* [Experiments](/langsmith/analyze-an-experiment) now show live loading progress in the header and the Progress column, so you can track completed and evaluated runs in real time.
* [Evaluators](/langsmith/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](/langsmith/evaluators) 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](/langsmith/manage-datasets), including from scratch, file upload, or a clone.
* Auto-attached Assertions [evaluators](/langsmith/evaluators) now read assertions from the reference output, so experiment scores reflect actual pass and fail results.
### Prompts and playground
* [OAuth client credentials](/langsmith/model-configurations#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](/langsmith/playground-model-providers) 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](/langsmith/model-configurations).
### Tracing
* [Trace query syntax](/langsmith/trace-query-syntax) now has a full operator reference, field table, and quick examples, so API filtering is easier to discover.
* The [OpenTelemetry guide](/langsmith/trace-with-opentelemetry) 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](/langsmith/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](/langsmith/alerts) to Slack as a native notification target and connect or disconnect the Slack app from the UI.
## Deployment
* Preview [deployments](/langsmith/deployment) now build the image for the preview commit instead of reusing the parent deployment's image.
## Sandboxes
* [Sandbox auth proxy](/langsmith/sandbox-auth-proxy) now documents GCP rules and service-account handling, so Google API access through the proxy is clearer.
* [Sandboxes](/langsmith/sandboxes) now marks AWS US SaaS availability as generally available, so the region table reflects the current rollout.
* [Sandboxes](/langsmith/sandboxes) now support Git mounts and Google Cloud Storage bucket mounts.
## Admin and billing
### Administration
* [Organization settings](/langsmith/administration-overview) 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](/langsmith/administration-overview).
### LLM Gateway
* The [LLM gateway](/langsmith/llm-gateway) now supports native Gemini routes for Vertex AI and the OpenAI embeddings endpoint.
* [Gateway guard](/langsmith/llm-gateway) policies now accept a granular PII configuration and a configurable timeout action.
### Usage and billing
* [Granular billable usage](/langsmith/granular-usage) now clarifies org scoping, so you can interpret usage totals more accurately.
## Observability and evaluations
### Engine
* [Engine](/langsmith/engine) now shows only project-level spend in project view, so org-wide spend stays in the org settings surface.
* [Engine](/langsmith/engine) now keeps the Slack issue-alert deck pinned above the scrolling issues list, so the callout stays visible as you browse.
### Datasets and experiments
The experiments table now displays loading progress bars showing the number of runs completed and evaluated, and experiments that predate this feature show a placeholder progress bar.
* [Dashboards](/langsmith/dashboards) now support time series bar and line charts backed by the v2 chart API, so monitored metrics can use the newer chart type.
* Categorical feedback now shows derived percentages in experiment tables, so pass/fail metrics are easier to scan.
### Prompts and playground
* [Playground](/langsmith/playground-model-providers) now mints OAuth bearers end to end for OAuth-enabled presets, so long-running batches and streams keep working.
## Sandboxes
* [Sandbox auth proxy](/langsmith/sandbox-auth-proxy) now supports GCP auth flows, so sandbox workloads can reach Google APIs through the proxy.
## Admin and billing
### Administration
* [Organization settings](/langsmith/administration-overview) no longer expose the hidden LCU rate-card admin modal or tenantless routes, so rate-card management stays behind the scenes.
## Fixes
* The Engine trial modal no longer shows the rough-math LCU bullet, so the pricing copy is less misleading.
## Observability and evaluations
### Automations
* [Run rule](/langsmith/rules) webhook payloads now include a trace deep link for each run, so downstream systems can jump straight back to the trace.
### Engine
* Per-workspace [Engine](/langsmith/engine) spend is now generally available: you can view LCU and USD spend directly on the Engine settings page, including session-level spend.
* The Engine settings page now surfaces additional Engine details in one place.
* You can rotate [Engine issue-board webhook](/langsmith/engine-webhooks) signing secrets from both the API and the webhook settings UI.
* The Engine issues list adds a sort option by trace count.
### Datasets and experiments
* A new out-of-the-box [Assertions evaluator](/langsmith/assertions) scores outputs against an explicit list of criteria specified in the reference output, and an Assertions rule is auto-attached when you add assertion-style examples to a dataset.
* Evaluator metrics are improved in the experiment detail, [comparison](/langsmith/compare-experiment-results), and global experiments tables.
### Prompts and playground
* The [Playground](/langsmith/playground-model-providers) supports Amazon Bedrock API key authentication, letting you authenticate with a bearer token instead of AWS credentials.
### Tracing
* The [trace view](/langsmith/view-traces) now shows an unread indicator on a run's actions menu when the run has reviewer notes you have not seen yet.
* The waterfall view is now full-height with sticky turn headers, so you keep your place while scrolling through long traces.
* Global search now includes context and sandboxes
## Deployment
* You can now trigger a LangSmith Deployment from the [Studio](/langsmith/studio) page.
* LangSmith Deployment now supports [deploying Google Agent Development Kit (ADK) agents](/langsmith/deploy-google-adk).
## Sandboxes
* [Sandbox proxy rules](/langsmith/sandbox-auth-proxy) now support configuring AWS authentication, so sandboxes can reach AWS services through the proxy with signed requests.
* Sandboxes can create [snapshots](/langsmith/sandbox-snapshots) from a Dockerfile build source.
## Admin and billing
### Administration
* Organization admins can now disable personal access token creation from the [organization settings](/langsmith/administration-overview) page.
### Usage and billing
* [Granular billable usage](/langsmith/granular-usage) now supports filtering and grouping by retention tier, separating long-lived from short-lived traces.
* The Granular Billable Usage page now surfaces LangSmith Deployment usage, including nodes executed, agent runs, and agent uptime, alongside trace usage.
## Fixes
* Performance improvements for the loading of large traces.
* Filter values for metadata are now preserved when you reopen a filter dropdown to edit it.
* Dataset creation now uses a multi-select dropdown for choosing CSV fields.
## New features
* [Fleet tools](/langsmith/fleet/tools) now include Salesforce OAuth provider setup for self-hosted users, so you can configure the provider end to end.
* Agent sharing is redesigned around two choices, who can use and who can edit an agent, plus a Publish as template option that lets others fork their own editable copy.
* Fleet agents now post a notification to the originating thread, such as Slack, when they pause at a human-in-the-loop interrupt, with a link back to the agent chat.
* You can now complete Fleet integration OAuth through your own callback URL, so headless setups can finish authentication without the LangSmith UI.
* Agent cards now show the agent owner.
* New first-party [templates](/langsmith/fleet/templates), Brand Copywriter and Applicant Screening, are available in the gallery.
## Fixes
* Switching threads in the agent chat now clears the previous thread immediately and shows a loading state instead of stale messages.
* The [skills](/langsmith/fleet/skills) list now degrades gracefully when one skill fails to load, so the remaining skills still appear.
## New features
* [Templates](/langsmith/fleet/templates) now show “by Fleet” with the Fleet logo, so curated templates match Fleet branding.
## Fixes
* The Fleet list-threads endpoint now returns `items` instead of `threads`, so the response shape matches the rest of the API.
* Fleet thread requests now return a clearer error when a large response would have triggered a 5xx, so long lists fail gracefully.
## New features
* [Skills](/langsmith/fleet/skills) load faster: the skills list fetches lightweight metadata first and loads file contents only when you open a skill.
* The agent creation menu adds a [Templates](/langsmith/fleet/templates) entry.
* The [remote MCP](/langsmith/fleet/remote-mcp-servers) authorization screen now shows the connecting application's name, logo, and homepage, terms, and privacy links instead of its raw client ID.
* [Slack integration](/langsmith/fleet/slack-app) available in AWS and APAC regions.
## Fixes
* [Scheduled (cron) execution](/langsmith/fleet/schedules) is restored for enterprise Fleet agents.
* Long-running agent runs and agent-builder generations are no longer cut off after 60 seconds.
* The Gmail read-emails [tool](/langsmith/fleet/tools) now returns results when you search sent mail with an `in:sent` query.
* Scrolling is improved for long toolbox, skill, and sub-agent lists in the agent editor, and webhook dialogs now scroll within the viewport.
***
[Connect these docs](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers.
[Edit this page on GitHub](https://github.com/langchain-ai/docs/edit/main/src/langsmith/changelog.mdx) or [file an issue](https://github.com/langchain-ai/docs/issues/new/choose).