Self-hosted LangSmith changelog

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langsmith-0.8.31

• This release packages the same LangSmith application version as langsmith-0.8.30. Refer to the langsmith-0.8.30 release notes below.

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langsmith-0.15.0-rc.14

• Fixed the truncation issue of the ‘Enabled’ column in the automations table.
• Improved handling of click events in the UI with the polly button icon fix.
• Implemented multiple UI enhancements such as the addition of solid icons, icon xs variants, and updated details view headers.
• Improved performance by removing unused join operations from session stats and optimizing query handling.
• Added new event hooks for model invocation and updated the fleet-admin permissions to include read access.
• Expanded model support with new tools for GLM5 and Minimax 2.5.
• Added new features to the evaluator UI, including filters by created_by, feedback key, and resource.
• Recognized external type definitions in evaluators, enabling more sophisticated feedback and sorting options.
• Introduced loading improvements for better data handling in various Fleet UI components.
• Enhanced fleet management with tool usage breakdowns, spend limit enforcement, and improved usage dashboards.
• Added support for auditing logs across Go write endpoints and audit logging for sensitive data access.
• Implemented new security features such as SSRF protection, transparent HTTP/HTTPS proxying, and enhanced authorization for self-hosted environments.
• Supported service identification with GitHub OAuth installation synchronization and CRUD operations.
• Introduced mobile-friendly login and a Progressive Web App (PWA) capability.
• Added the capability to invite users to organizations via a new endpoint.
• Enhanced message processing with SubAgentDetails, facilitating better context capture and management.

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langsmith-0.15.0-rc.13

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.12. Refer to the langsmith-0.15.0-rc.12 release notes below.

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langsmith-0.14.6

• Fixed storage issue by backporting S3 CopyObject KMS headers to v14, improving data transfer security for S3 integrations.
• Fixed security vulnerabilities: CVE-2026-40192, CVE-2026-40347, CVE-2026-41205, CVE-2026-42561

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langsmith-0.15.0-rc.12

• Fixed the truncation issue in the ‘Enabled’ column of the automations table to improve UI usability.
• Improved the evaluator details page and added sorting capabilities for created and updated timestamps.
• Enhanced evaluator tables by adding a type filter and click-to-filter functionality for type, feedback key, and resource cells.
• Added a new evaluator reuse feature to streamline the use of existing evaluators.
• Improved frontend evaluators to include feedback key and resource filters, enhancing usability.
• Added support for tracing tool usage and displaying agent names in the usage dashboard, enhancing performance insights.
• Expanded session management features with Redis tracking for SmithDB run rules.
• Enhanced mobile friendliness and PWA support for login interfaces.
• Improved performance by optimizing session synchronization and indexing strategies.
• Added mTLS support for ClickHouse migrations.
• Added parallel tool calls rendering in the messages view for better visual representation of concurrent processes.
• Introduced a new endpoint to update licenses for self-hosted instances via JWT.
• Added a new UI section for displaying evaluator actions required when creating an issue board.
• Implemented mobile-friendly login and an installable PWA to enhance accessibility for mobile users.
• Streamlined session and dataset tracking by integrating Redis for run rules in SmithDB.
• Enhanced DataGrid components for better UI performance in tracing views.

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langsmith-0.15.0-rc.10

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.9

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.8

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.7

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.6

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.5

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.4. Refer to the langsmith-0.15.0-rc.4 release notes below.

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langsmith-0.15.0-rc.4

• Enhanced the Messages View with auto-scroll navigation, parallel tool calls rendering, and improved styling
• Improved Messages View performance with better memory utilization and processing times
• Added thread ID display in run details with copy-to-clipboard functionality
• Added the ability to open threads in new tabs
• Fixed dark mode gradient styling
• Fixed OAuth refresh race condition in Fleet
• Fixed run rules not marking matched runs as completed in Redis at max attempts
• Fixed dataset evaluators incorrectly created with group_by thread_id
• Added new run rules logic for workspaces with no existing rules
• Removed self-hosted gate for Fleet usage page
• Hidden minimal reasoning effort option for GPT-5.x models in the playground

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langsmith-0.14.5

• Fixed the agent-builder failure to start on v14 self-hosted 0.14.6 due to the langgraph-api 0.8.3 base image bundling LangSmith 0.7.37, which removed SandboxTemplate, by pinning LangSmith<0.7.34 to downgrade to a compatible version.

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langsmith-0.15.0-rc.3

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.1. Refer to the langsmith-0.15.0-rc.1 release notes below.

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langsmith-0.14.3

• Fixed silent corruption of traceId, spanId, and parentSpanId for OTLP/JSON (Content-Type: application/json) trace ingestion.
• Reduced Microsoft Graph permission requirements for Microsoft 365 docs and Teams private-message tools.

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langsmith-0.15.0-rc.2

• This release packages the same LangSmith application version as langsmith-0.15.0-rc.1. Refer to the langsmith-0.15.0-rc.1 release notes below.

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langsmith-0.15.0-rc.1

• Fixed truncation issue by widening the ‘Enabled’ column in the automations table for better header visibility.
• Updated details view header for improved user experience.
• Improved performance by removing dead run_stats_facets join from session stats queries.
• Fixed MCP server filter dropdown to make it scrollable.
• Added ‘user cost’ table and toggle for agent/user view in the fleet.
• Enhanced security by adding URL allowlist enforcement for JWT injection.
• Added ability to sort evaluators by creation and update time in the backend.
• Added ‘Feedback Key’ filtering in the evaluators table for more precise searches.
• Showed back button on the full-page trace view to enhance navigation.
• Fixed audit-logs and various performance improvements for lower latency.
• Enhanced UI by showing ‘Feedback Key’ in evaluator column dropdown.
• Added session insights, views, metadata, and dashboard endpoints to improve data accessibility.
• Fixed file creation issues to prevent active interrupt state clearance.
• Provided async support for agents in the fleet to improve reliability.
• Fixed issues with agent cloning that previously caused flow issues.
• Added spend limit enforcement and the ability to track usage, enhancing cost management features.
• Made more efficient use of resources with new skill memory-store mirror updates in fleets.
• Improved evaluator reuse UX for users with better management of evaluator actions on issue generation.
• Enhanced security features by preventing sub-agents from triggering unauthorized actions.
• Optimized memory and resource management in the agent builder chat.
• Improved evaluator trace detail navigation by preserving search model in URLs.
• Upgraded per-environment favicon colors for clarity in staging and dev environments.
• Performance improvements in session sync reducing resource usage.
• Added default agent name support in usage dashboard for clarity in report generation.
• Made UI improvements to evaluator details for a smoother experience.
• Enabled auto-wake and auto-stop for Sandbox environments to save resources.
• Integrated tracing tool functionality in issue creation for better context and reliability.
• Added “create agent manually” button to navigation for easier agent management.
• Enhanced memory management tools UI for better approval process visualization.
• Fixed tool usage table and improved its performance for a better UX.
• Enabled auditing for sensitive data access endpoints for enhanced security compliance.
• Improved tracing project name display in usage dashboard for better project clarity.
• Introduced keyboard shortcuts in the editor page for rapid interaction.
• Set default MSP cron schedule as standard to reduce manual setup effort.
• Added integration user flow with prompt messages for smooth operation and understanding.
• Fixed default tracing project selection to Fleet to prevent inconsistencies.

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langsmith-0.14.2

• This release packages the same LangSmith application version as langsmith-0.14.0. Refer to the langsmith-0.14.0 release notes below.

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langsmith-0.14.1

• This release packages the same LangSmith application version as langsmith-0.14.0. Refer to the langsmith-0.14.0 release notes below.

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langsmith-0.14.0

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Breaking changes

• Fixed an issue where host-backend wasn’t picking up commonEnv. This may result in duplicate environment variables that need to be removed.

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Infrastructure changes

• Migrations now run as a Pre-upgrade hook prior to image versions rolling out. This will prevent issues when migrations fail.
• GCS Workload Identity support — authenticate to GCS blob storage using cloud-native workload identity instead of long-lived credentials.
• Valkey support — Valkey can now be used as a drop-in replacement for Redis.

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New features

• Polly on self-hosted — our AI assistant for understanding traces, runs, and evaluator feedback is now available in self-hosted.
• ABAC and audit logs GA — Attribute-Based Access Control and audit logs are enabled by default for self-hosted deployments.
• LLM Auth Proxy on by default — URL allowlist prevents credential forwarding to unintended hosts, and JWTs now carry organization_name and workspace_name claims.
• Unified model configurations — Agent Builder, Polly, Insights, Playground, and Evaluators now share a single set of model configs, with workspace-admin controls over model access across all AI features.
• Prompt Owners — designate a specific group of users with fine-grained permission to promote or delete individual prompts, without granting broader org access.
• Multi-modal evaluators — pass attachments and base64 content (images, audio, PDFs) directly into evaluators.
• Cost alerts on tracing projects — set alerts on tracing project-level costs alongside existing LangSmith alerts.
• Expanded playground model support — Anthropic via Vertex AI, custom Azure models, Bedrock inference profiles and configurable base URLs, Gemini 3.1 Pro, GPT-5.3 / 5.4 (now default), and Baseten + GLM-5.
• New agent tools and triggers — Google Sheets and Docs, Outlook mail and calendar, Microsoft Teams, Salesforce SOQL, Gmail OAuth v2 with refresh tokens, and an Outlook Trigger.
• Insights enhancements — scheduled Insights reports, categories trending over time, full feedback comments in analysis, and a lower minimum job interval (6h → 1h).
• Annotation and review upgrades — required reviewers per queue, pairwise queues that honor reviewer_access_mode, an “Assigned to me” filter, per-annotator CSV export, and bulk table actions.
• Prompt Hub and tool registry — commit tag search, model select in template creation, a workspace-scoped tool registry API, and a private registry UI.
• Evaluator workflow improvements — prebuilt LLM evaluators use strict structured outputs by default, evaluators support tagging and reuse, retries no longer lose scores, and a new API runs playground experiments programmatically.
• Custom iframe output renderer — drag-to-resize HTML chart outputs in experiments and trace views.
• Thread and inbox UX — auto-generated thread titles, redesigned run details in threads, session-level feedback stats, keyboard shortcuts, and filtering out internal helper threads.

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Admin changes

• Granular usage reporting — granular billable usage APIs that allow you to retrieve detailed trace usage data broken down by workspace, project, user, or API key.

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langsmith-0.13.43

• This release packages the same LangSmith application version as langsmith-0.13.42. Refer to the langsmith-0.13.42 release notes below.

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langsmith-0.13.42

• Fixed issue in metadata filtering to recognize json.Number as a primitive type, improving data ingestion accuracy.

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langsmith-0.13.41

• Internal improvements and maintenance updates

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langsmith-0.13.40

• Added support for mTLS configuration to enhance self-hosted security.
• Improved the loading speed of the Fleet interface.
• Fixed a bug in the tracing UI that caused intermittent display issues.
• Added support for Redis Cluster, improving scalability for self-hosted deployments.
• Improved PostgreSQL IAM integration for better database management in self-hosted instances.

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langsmith-0.13.39

• Users can now run experiments without projects:create, decoupling experiment execution from project governance controls.
• Added skeleton loading state when switching between agent chat threads instead of a blank chat input.
• Improved the Fleet Arcade integrations page to display correct actions and clearer backend states.
• Arcade gateway installs now automatically sanitize invalid MCP server names before adding them to a workspace.
• Users can now see assigned reviewers as name chips in the annotation queue list and filter to queues they are assigned to via an “Assigned to me” button.
• Improved run details hover on the trace tree for less flicker when clicking or moving quickly between rows.
• Fixed a timeout when generating Insights reports with feedback enabled on high-volume workspaces.
• Arcade integrations now show a permission error instead of a generic upstream failure when a connected user lacks access to the configured Arcade project.
• Added a clickable ID badge to the experiment detail page header for easy copying of the experiment ID.
• LLM auth proxy JWTs now include organization_name and workspace_name claims.
• Added dataset split selection to the evaluator playground, allowing users to run evaluator experiments on specific dataset splits.
• Fixed experiment comparison view showing contradictory improvement arrows and regression cell colors for composite scores.
• Fixed a bug where deleting traces from pre-compression multipart blob storage objects could corrupt byte ranges for other traces in the same object, causing 416 errors when reading their payloads.
• Fixed crash when viewing a tool run in an in-progress trace.
• Lowered Insights job schedule minimum interval from 6 hours to 1 hour, configurable via CLIO_SCHEDULE_MIN_INTERVAL_SECONDS environment variable.
• LLM auth proxy now supports Insights (CLIO) service identity for JWT-based LLM authentication.
• Fixed subagent files not being deleted from hub repo memory when subagents are removed in the agent editor.
• Simplified Arcade workspace connection status to show “Workspace configured” instead of the confusing “Connected account” label with a redundant badge.
• Fixed a bug where expanding a tool call in the run detail view and scrolling away caused it to collapse back when scrolled into view again.
• Agent file reads (clone, inspect, startup) now correctly use the hub as the source of truth when hub memory is enabled.
• Fixed custom output rendering (HTML charts via iframe) not working in the redesigned experiment detail panes.
• Allowed usage of LLM Auth Proxy in self-hosted by default.
• Sessions facets raw path now returns input/output KV facets when RUNS_LITE_STATS_TENANTS is enabled, matching the Python backend behavior.
• Click-to-copy tooltips (e.g. project ID) now respond to clicks on the tooltip content itself, not just the trigger badge.
• Improved MCP server authorization enforcement in the platform backend.
• Added Baseten as a model provider with GLM-5 support.
• Improved LLM inference efficiency by reducing date precision in system prompts from minute-level to date-only.
• Fixed Polly losing trace context when a trace page is expanded to full page view.
• Added a unified files sidebar to Fleet chat, accessible via a “Files” button in the header, to browse, search, create, rename, move, and preview all agent-generated files in one panel.
• Added SSRF_ALLOW_PRIVATE_IPS_WEBHOOKS, SSRF_ALLOW_PRIVATE_IPS_MCP_SERVERS, and SSRF_ALLOW_PRIVATE_IPS_TOOLS environment variables to allow self-hosted deployments to connect to services on private IP ranges.
• Added get_current_time tool to Polly so relative time expressions in filter queries resolve correctly.
• Reference outputs are now always visible in the experiment trace detail view, fixing an issue where they were hidden for some organizations.
• Fixed agent OAuth connections failing with “Unknown provider” errors for non-personal agents.
• Added Base URL configuration support for Bedrock models in the playground and model configurations, enabling custom endpoint URLs for proxy or gateway deployments.
• Added sign out button back to the settings page sidebar.
• The run rules list endpoint now returns backfill_id when backfill progress is requested.
• SSO users can no longer see or accept pending invites to organizations other than their own SSO organization.
• Fleet webhook execution now uses a dedicated endpoint instead of the MCP proxy.
• Added session-level feedback stats to the sessions API for parity with the Python backend.
• Improved MCP proxy authorization and URL safety checks for agent runtime requests.

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langsmith-0.13.38

• Fixed MCP OAuth tools (e.g., Hex, Notion) failing on self-hosted deployments when HOST_BACKEND_ENDPOINT_PUBLIC lacked an https:// scheme.
• Insights agent now includes full feedback comments when analyzing traces.
• Removed the legacy Feed page in Fleet; Inbox is now the default thread view for all tenants.
• Fixed a permission error that blocked users from creating evaluators when using the evaluator reuse feature.
• Org admins can now grant Model Configuration management to workspace editors and custom roles via Settings > Roles.
• Pairwise annotation queues now respect reviewer_access_mode: completion/archive logic gates on assigned reviewers only, and GET responses include assigned_reviewers.
• Agent chat messages are no longer grouped into a collapsible “Completed N steps” container. A single copy dropdown on the last AI message of each turn lets you copy just the response or all steps including tool outputs.
• Fixed pagination in the waterfall view for thread traces, where threads with more than 20 turns now load additional traces when scrolling.
• Fixed “Empty Message” text appearing in the agent editor chat when AI invokes tools without accompanying text.
• Added Salesforce SOQL query tool to Fleet, enabling agents to query Salesforce data via OAuth.
• Annotation queue run list items now show reviewer names and avatars when hovering over the review stats badge.
• Go session stats now return feedback_key, feedback_key_score, feedback_value, and feedback_source facets in run_facets, matching the Python backend.
• Fixed /info endpoint returning 401 when infoEndpointAuthRequired is enabled with SSO authentication.
• Added a documentation link button to the “Trigger Webhook” section in the Save prompt dialog for easier access to webhook docs.
• Fixed layout shift in agent chat caused by the copy button unmounting during streaming.

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langsmith-0.13.37

• Added URL allowlist for the LLM Auth Proxy to prevent credential forwarding to unintended hosts.
• Enabled audit logs by default for self-hosted deployments.
• MCP servers now respect granular RBAC permissions in the UI; users only see actions their role allows.
• Enabled ABAC by default for self-hosted deployments.
• Fixed low-frequency SmithDB ingestion errors (“incomplete chunked payload”) during multipart uploads when the HTTP body is truncated.
• Fixed a bug with OpenAI tools rendering.

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langsmith-0.13.36

• This release packages the same LangSmith application version as langsmith-0.13.32. Refer to the langsmith-0.13.32 release notes below.

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langsmith-0.13.35

• This release packages the same LangSmith application version as langsmith-0.13.32. Refer to the langsmith-0.13.32 release notes below.

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langsmith-0.13.34

• This release packages the same LangSmith application version as langsmith-0.13.32. Refer to the langsmith-0.13.32 release notes below.

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langsmith-0.13.33

• This release packages the same LangSmith application version as langsmith-0.13.32. Refer to the langsmith-0.13.32 release notes below.

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langsmith-0.13.32

• Added ability for users to find account labels for first-class providers.
• Fixed issue where switching alerts did not switch charts accordingly.
• Fixed key error for experiments with attachments.
• Added dismiss button functionality to the agentify banner.
• Improved responsiveness in run details header and compare traces.
• Added truncate property to feedback chips list to respond to container width.
• Fixed subpixel bleed on body rows in the repetition summary table.
• Fixed race condition in AQ run archive check.
• Patched 9 medium security alerts and 4 high security alerts.
• Renamed Metadata to Attributes in the comparison detail pane.
• Enabled toggle panel size button in RepetitionDetailPane.
• Updated model cards in the frontend.
• Fixed issue to load prompt picker when opening playground from experiments table.
• Properly disabled environment promotion buttons for users without tag permissions.
• Enabled granular usage rollup cron for self-hosted instances.
• Onboarded more CUD operations for audit logs.
• Added Ashby integration migration to Agent Builder.
• Improved performance by parallelizing graph loading and eliminating redundant MCP fetches in Agent Builder.
• Automatically expanded/collapsed keys for improved UI.
• Fixed blue hover state for trace comparison divider.
• Avoided MITM races during sandbox startup with Smithbox proxy.
• Fixed bar height calculation in the granular usage chart.
• Added Dynatrace webhook integration for alerts.
• Displayed toast notification on “run now” button click in Forge.
• Handled non-string resource fields in MCP OAuth discovery.
• Added feedback banner for experiment sidebar redesign.
• Added example attachments to experiment detail panes.
• Wired Arcade integration to real OAuth flow in Agent Builder.
• Fixed loading flash in host revisions table during revalidation.
• Fixed imports in host backend for truststore.
• Added request context to authentication middleware error log in Agent Builder.
• Fixed editing prompt feature in evaluator.
• Fetched full run data in new experiment detail pane.

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langsmith-0.13.31

• This release packages the same LangSmith application version as langsmith-0.13.28. Refer to the langsmith-0.13.28 release notes below.

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langsmith-0.13.30

• This release packages the same LangSmith application version as langsmith-0.13.28. Refer to the langsmith-0.13.28 release notes below.

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langsmith-0.13.29

• This release packages the same LangSmith application version as langsmith-0.13.28. Refer to the langsmith-0.13.28 release notes below.

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langsmith-0.13.28

• Fixed ABAC permission checks to improve self-hosted instance functionality.
• Enhanced agent builder by handling DotDict in decrypting passthrough headers.
• Improved fleet logo for better dark mode support.
• Updated Slack reauthorization required message with link to integrations page in Agent Builder.
• Added network allow-deny list feature.
• Introduced new access control UI for the sandbox proxy.
• Fixed GCS workload identity in storage and added copy health check.
• Reduced concurrency and added timeout for scheduled insights jobs.
• Enhanced frontend performance by reducing the number of preload chunks during initial load.
• Added caching for /info and /auth/v1/user responses in localStorage to improve frontend performance.
• Enabled JWT generation for auth-proxy in playground service for enhanced security.
• Recreated feedbacks index in the backend for storage optimization.
• Implemented gating for workspace skill editing by repo ownership in the Agent Builder.
• Added static TTL expiry for sandbox claims for improved management.
• Enabled Slack channels for personal agents in Agent Builder.
• Adjusted frontend contrast for run status icons in light mode for better visibility.
• Implemented JWT generation for LLM-as-judge evals to enhance evaluation security.
• Always display creator name on agent workspace cards for better transparency.
• Reordered inbox tabs to improve navigation.
• Supported Google IAP session refresh in self-hosted environments.
• Replaced MUI checkboxes in various sections to improve UI consistency.
• Improved experimental evaluator SAQ timeouts matching online eval paths for better performance.
• Supported RDS DB instance on k8s platform for enhanced infrastructure flexibility.
• Loaded LLM auth proxy JWT signing key from LANGSMITH_SIGNING_JWKS to align with security standards.
• Improved run detail dropdown design for a better user experience.
• Added service key authentication to runs, sessions, and sandbox endpoints for enhanced security.
• Added LangChain vendor extractor to enhance message processing capabilities.
• Fixed parsing errors related to cache reads impacting costs for better performance metrics.
• Introduced support for specifying environment variables from secret references for improved configuration management.

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langsmith-0.13.27

• Organization admins can now edit member display names inline from the members table in Settings.
• Multipart ingestion requests no longer accept Inputs, Outputs, or Events as inline fields. These must be sent as dedicated out-of-band parts.
• Tracing support email on the Home page error banner is now a clickable mailto link.
• Improved run details tab highlighting so selected sections stay correctly highlighted near scroll boundaries.
• Improved keyboard shortcut rendering in the chat assistant tooltip.
• Fixed connect/disconnect button on Slack integrations.
• Added prompt environments support.

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langsmith-0.13.26

• Sub-agents spawned during Fleet conversations now display real-time status cards inline in the chat, with a detail sidebar showing the sub-agent’s live timeline, tool calls, and results.
• Prebuilt LLM evaluators now use strict structured output mode by default. Strict mode automatically toggles when switching between OpenAI and non-OpenAI model providers.
• Fixed a bug where online evaluator scores were lost when the evaluation succeeded on a retry but the total job time exceeded the queue timeout.
• Deleting a run from an annotation queue now fully removes it instead of incorrectly marking it as completed.
• Included per-annotator feedback in experiments CSV export.
• Uploading dataset examples with invalid UTF-8 in inputs or outputs now returns a 422 error instead of a 500.
• Reduced CPU and memory requirements for dev and dev_free self-hosted deployments.
• Reject insecure default JWT secret at startup for improved security.
• Updated brand colors for neutral backgrounds and surfaces.
• Renamed prompt usage example label from “Use object in LangChain” to “Use Programmatically”.
• Fixed agent zip upload to correctly place cron schedules in the Schedule section.
• Inbox now sorts the All tab by recency and properly wraps long messages in preview.
• Fixed chat assistant tooltips rendering behind the chatbox.
• Added ABAC authorization middleware.

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langsmith-0.13.25

• This release packages the same LangSmith application version as langsmith-0.13.24. Refer to the langsmith-0.13.24 release notes below.

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langsmith-0.13.24

• Added rich markdown editor with toolbar and slash commands in Fleet.
• Added skill creation flow with page entry and navigation in Fleet.
• Annotation queue CSV exports now include per-annotator feedback scores and a reviewer notes column.
• Fixed dataset metadata filters not matching number fields across pages.
• Fixed datasets table only showing first page of results on tall screens.
• Alert like/notlike filters on error, inputs, and outputs now correctly match individual tokens instead of the full phrase.
• Fixed list_runs tool crashing when the LangSmith API returns an error.
• Fixed stray artifact in system prompt for Gemini models.
• Accepting an organization invite now navigates to the newly joined organization.
• Improved Playground auto-scroll during streaming output.
• Added workspace scope display for personal API keys.
• Bumped Python to 3.13 and pinned OpenSSL to resolve security vulnerabilities.
• Blocked shell injection characters in build/install commands.
• Improved Polly assistant understanding of traces and runs.
• Fixed baseline experiment stats not showing on initial page load.
• Fixed duplicated x-axis date labels on the insights time series chart.
• Re-enabled ABAC for listing datasets.
• Added ABAC runs delete endpoint.

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langsmith-0.13.23

• Patched security vulnerabilities in smith-frontend.
• Patched security vulnerabilities in smith-polly.
• Fixed a code injection vulnerability.
• Restricted --allow-run to only the deno binary in smith-ace.
• Fixed XSS vulnerability by escaping URLs in the RichTextEditor.
• Fixed Playground functionality in self-hosted environments.

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langsmith-0.13.21

• This release packages the same LangSmith application version as langsmith-0.13.20. Refer to the langsmith-0.13.20 release notes below.

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langsmith-0.13.20

• Added JSON/YAML syntax highlighting to experiment comparison for better readability.
• Improved thread trace opening behavior in the frontend, removing the need for an expand button.
• Eliminated n+1 query issue in the backend for listing personal access tokens, improving performance.
• Fixed support for OpenAI compatible endpoints with smith-polly integration.
• Timed out bulk exports stuck in CREATED status to avoid indefinite processing.
• Addressed issue where service identity access was blocked from creating repository endpoints.
• Recorded hub prompt commit in experiment session metadata for better session tracking.
• Improved authentication for /sessions shadow queries.
• Updated backend deployments with ABAC (Attribute-Based Access Control).
• Enhanced UI with projects and runs write permissions support.
• Added support for new models: GPT-5.4 and GPT-5.4 pro.
• Fixed large attachment image preview issue for better UI experience.
• Made GPT-5.4 the default OpenAI playground model, simplifying model selection.
• Increased maximum tags displayed in RunTags component for better visibility.
• Added models and prompts columns to experiments table, enhancing data insights.
• Resolved agent builder runs rejection issue when limit settings were changed.
• Fixed float errors in /sessions go endpoint for improved data handling.
• Returned fetched value when Redis cache SET fails, improving reliability.
• Enabled AWS IAM role support for agent builder, Polly, and Insights features.
• Redesigned custom chart CRUD in the frontend, enhancing user satisfaction.
• Introduced prompt filtering in the experiments table for targeted data analysis.
• Updated inbox counts and thread fetching logic in Agent Builder for real-time information.
• Added a feature to group experiments by prompt for streamlined data management.

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langsmith-0.13.19

• This release packages the same LangSmith application version as langsmith-0.13.18. Refer to the langsmith-0.13.18 release notes below.

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langsmith-0.13.18

• Introduced a redesigned run details view in threads for improved user experience.
• Fixed an issue where popovers were covering other content in the UI.
• Added Microsoft Outlook Calendar Tools to the Agent Builder for integration.
• Addressed bugs related to agent chat popups and placeholders in the Agent Builder.
• Improved support for disabling feedback comment filtering in self-hosted instances.
• Enhanced performance with improved code splitting in the frontend.
• Added model support for GPT 5.3 instant and GPT-5.3-chat-latest.
• Introduced a new single_run filter type for more refined querying.
• Added ability to read insights reports and show insights categories over time.
• Added drag-to-resize functionality with persistence in custom iframe output renderer.
• Enhanced security with more robust user migration processes.
• Enabled tagging support for evaluators and enhanced their reuse functionality.
• Fixed issues with session expired warnings after logout.
• Enhanced UI components for better user interaction in the playground and feedback tagging.
• Improved metadata handling in datasets and fixed overflow issues.
• Introduced support for Microsoft Teams Tools in the Agent Builder.
• Implemented better handling for OAuth provider updates.
• Added new /orgs/current/info endpoint to the platform-backend for more robust organizational information retrieval.
• Introduced compatibility testing for session API with added safety checks for PostgreSQL and Redis connections.
• Added functionality to bind Slack agents dynamically, enhancing the integration experience.

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langsmith-0.13.17

• Fixed a bug in the executor deployment handling for new operator versions.
• Added a setting to filter out internal helper threads from the inbox.
• Improved the evaluator’s page by providing context to Polly’s feedback.
• Forced trace filtering for dataset code evaluators to enhance stability.
• Updated OAuth mode management, restricting changes during updates.
• Fixed an issue with experiment cell colors to enhance user clarity.
• Improved the usage configuration modal to utilize a new TTL endpoint for trace retention.
• Addressed a bug where workspace invites were not displaying correctly in the UI.
• Applied brand color adjustments in dark mode and various UI elements.
• Enhanced OAuth callback security by preventing potential reflected XSS vulnerabilities.
• Added a dynamic OAuth feature for user management.
• Fixed a bug preventing filter updates when certain conditions were met.
• Implemented rebranding updates for the auth screen.
• Added a feature to collapse sidebar automatically on small viewports.
• Fixed issues with variable handling in playground evaluate mode.
• Enhanced the Agent Builder with infinite scroll and improved inbox fetching.
• Added a new Outlook Trigger feature in the Agent Builder.
• Upgraded agent-builder to use websockets and new OpenAI model API (gpt-5.3-codex).
• Fixed auto-save on API key during onboarding process.
• Resolved issues causing errors in the playground due to empty placeholders.
• Updated frontend with a new logo for favicon.
• Fixed authorization bugs in cron deployment for Gmail/Outlook.
• Updated styling in various UI components, including studio button and index column behavior.
• Enhanced onboarding snippets for better integration with Langchain Python.
• Added support for custom separators in SCIM group names.

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langsmith-0.13.16

• This release packages the same LangSmith application version as langsmith-0.13.15. Refer to the langsmith-0.13.15 release notes below.

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langsmith-0.13.15

• Added rebranded primary colors to button under feature flag in the frontend UI.
• Replaced dataset autocomplete with tag input to improve user experience.
• Auto-hide and position Models column in the frontend based on data.
• Fixed revalidation conflict in the Smith frontend.
• Improved workspace model configurations to prevent text overflow with tooltips.
• Surfaced Models option in Group By popover under a feature flag.
• Supported loading ChatAnthropicVertex model configs in Smith-Polly.
• Added “No matching filters” message for empty search results in Filter Component Select V2.
• Enabled navigating automatically to insights with global scroll support.
• Resolved issues with playground and evaluators provider selector not filtering out disabled providers.
• Improved messaging mode user experience and styling.
• Implemented Raw Query Mode for Inline Filters.
• Allow secret_key_ref to be None in K8sEnvVarSource for backend improvements.
• Fixed agent builder UI to wrap question text on narrow viewports and dismiss “Add API Key to Get Started” dialog.
• Updated UX to match evaluator button height with tool button pattern.
• Persisted selected model in local storage for a consistent UI experience.
• Auto-generated thread titles for improved thread management.
• Enhanced backend by gating secrets access with granular RBAC permissions.
• Implemented Outlook Email Tools in the Agent Builder.
• Improved keyboard shortcuts in the inbox feature of the Agent Builder UI.

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langsmith-0.13.14

• Fixed agent generation interruptions and handling, improving stability in the user experience.
• Fixed long feedback header text overflow when dragged to the last column.
• Added OAuth connections for built-in tools and providers on the tool page.
• Fixed crashes occurring on the run details page.
• Fixed onboarding dialog not fetching tools unnecessarily.
• Updated agent builder frontend to show real-time run count.
• Added private registry UI to the frontend.
• Enhanced support for SerializedConstructor model configs in playground and insights.
• Added Gemini 3.1 Pro model to playground and backend model lists.
• Fixed tool registry crash in the playground.
• Added support for Gmail authentication improvements, including refresh token capability.
• Added new API endpoints for running playground experiments using a new service.
• Improved UI for trace filters with version 2 UX using Filterbar.
• Enhanced syntax highlighting to match Figma design for standardization.
• Supported Gmail OAuth v2 with cron logic for higher reliability.
• Added new models column in the experiment view with updated filtering options.
• Supported multiple paths for query shadowing log improvements.
• Added UIs for managing and editing model API key names in the playground.

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langsmith-0.13.13

• Reverted the PostgreSQL version to v14.7 and the Redis version to v7. This fixes breaking changes introduced in langsmith-0.13.10.
• Fixed internal error details being leaked in 5xx responses to enhance security.
• Improved View UI by moving SaveViewButton from ViewDropdown and changing SaveForm to a modal for better usability.
• Added model select dropdown to the template creation flow for enhanced user experience.
• Added warning for duplicate URLs when creating MCP server to prevent configuration errors.
• Added user context to agents and sub-agents for better feature functionality.
• Added support for SerializedConstructor model configs in the playground for improved flexibility.
• Enhanced UI by showing categorical feedback in experiment view config and hiding the sort icon.
• Improved playground and experiment views by fixing cell alignment.
• Added image upload support to facilitate better asset management.
• Added onboarding dialog to general-purpose agent for improved user guidance.
• Added spinner to loading triggers skeleton for better loading indication.

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langsmith-0.13.12

• Improved button sizes and filter chip alignment in the InlineFilters UX.
• Added commit tags search and display to the Prompt Hub.
• Fixed issue with viewing experiments having objects for feedback scores.
• Enhanced tracing for the deploy_image task.
• Added a search bar for the new consolidated filter dropdown.
• Added environment variable for globally disabling personal access token creation.
• Added cost charts feature.
• Improved homepage styling and fixed related design issues.
• Fixed issues with rerendering in General Purpose API (GPA).
• Improved system to count PENDING, RETRY, and FAILED transactions in self-hosted offline usage reporting.
• Enhanced the agent builder to localize the current date to the user’s timezone.
• Added Bedrock inference profile dropdown to the playground.
• Improved error detection and messaging for server issues in agent-chat.
• Fixed styling issues including email count in invite modal and load state display in the agent editor.
• Implemented initial design for a tools page with feature flags.
• Added icon-only filter popover mode to the frontend filter UI.
• Added beacon endpoint for Self Hosted Agent Builder Runs Limiting.
• Enable new Granular Usage tab for reporting billable usage by workspace, project, user, and API key (enable with DEFAULT_ORG_FEATURE_ENABLE_GRANULAR_USAGE_REPORTING=true and GRANULAR_USAGE_TABLE_ENABLED=true environment variables in commonEnv)

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langsmith-0.13.11

• Improved Agent Builder by using persisted simple model config.
• Fixed UI for Playground with better message block and tool button consistency.
• Added a search bar for the new consolidated filter dropdown.
• Fixed agent builder model selector for users without ‘workspaces:manage’ permission.
• Added file upload feature for General Purpose Agent.
• Added button to create General Purpose Agent.
• Enhanced the Playground by preserving baseline setting in URL on page reload.
• Improved Playground experiment table UI and alignment.
• Fixed bulk deletion of datasets to update the table correctly.
• Added new API: workspace-scoped tool registry API.
• Improved support for multifield runFields.
• Enhanced insights scheduler with backend changes.
• Added ability to navigate pages in Polly and an initial set of base evaluations.
• Added tracing enhancements to Agent Builder, including tool call tracing.
• Integrated changes to support custom model configs temporarily.

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langsmith-0.13.10

• This release packages the same LangSmith application version as langsmith-0.13.9. Refer to the langsmith-0.13.9 release notes below.

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langsmith-0.13.9

• Fixed sorting of workspaces alphabetically in the new switcher to improve user experience.
• Improved playground with new tool modal design and model config popup windows for enhanced usability.
• Fixed issue with creating tags being idempotent.
• Modified Agent Builder to cache MCP tools list, session ID, and OAuth tokens for better performance.
• Fixed updated error message for exhausted agent builder runs.
• Fixed routing configuration for the agent builder /allow-run API endpoint.
• Fixed spacing of home page tables for improved UI.
• Fixed issue with datasets repeatedly fetching if empty.
• Fixed edit access for API keys for non-admin users.
• Added cost and token columns in the experiment view for better data insights.
• Fixed an issue where the Slack trigger was dropping messages due to authentication errors.
• Fixed boolean feedback values handling in comparison table cells.
• Updated service key subject for API calls to /allow-run for accurate authentication.
• Improved agent builder to use persisted simple model config.
• Fixed error state handling for OAuth login failures.
• Enhanced agent builder by ensuring threads display errors on reconnect in agent chat.
• Fixed UI to ensure the footer menu closes on organization switch.
• Improved tagging authentication by using specific resource auth.
• Enhanced UI to prevent closing the pane from within the app selector dropdown.
• Fixed potential SQL injection risks in feedback and annotation queue listing.
• Added a 15-second timeout to the OAuth HTTP client for improved connection reliability.

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langsmith-0.13.7

• This release packages the same LangSmith application version as langsmith-0.13.6. Refer to the langsmith-0.13.6 release notes below.

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langsmith-0.13.6

• Fixed an issue with truncated large numbers affecting the user interface.
• Improved error string conversion from S3 to enhance error handling.
• Updated Filters UX to save DateTimeRange, improving user experience.
• Fixed UUID conversion to ensure consistent general agent identification.
• Fixed agent ID conversion to always use a string instead of UUID for stability.
• Enhanced the experiment comparison view by showing custom computed columns.
• Fixed chat preview for langchain-shaped output for better user experience.
• Improved caching mechanisms and authentication control planes’ RetryableHTTP.
• Fixed the issue of incorrect tenant usage when bootstrapping agents.
• Improved user interface by adjusting page padding to remove visual obstructions.
• Updated wording for trace-related inquiries to improve clarity.
• Enhanced large field uploads to S3 for single run POST/PATCH endpoints.

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langsmith-0.13.5

• Fixed regression on cloning prebuilt dashboards to enhance user experience.
• Updated Filters UX to match new mocks and improved the view dropdown.
• Fixed Agent Builder by converting UUID to str before JSON encoding to prevent errors.
• Added an updated insights sidebar for a more informative UI.
• Implemented bulk actions for tables to improve data management efficiency.
• Added a redesigned feedback banner for annotation queue in the frontend.
• Provided option to require feedback in the Smith frontend to enhance user communication.
• Limited Agent Builder template list to 2 rows for better usability.
• Fixed cursor jumping issue when editing agent builder skill name and description.
• Solved SSO+SCIM issue, always provisioning users to workspaces.
• Fixed Slack Auth disconnecting issue for workspace users.
• Enhanced missing tool experience in the Agent Builder by adjusting prompts.
• Prevented session fixation in self-hosted OAuth for enhanced security.
• Fixed the ‘view run’ regression in the annotation queue redesign in Smith frontend.
• Reduced gRPC streaming chunk size from 1MB to 64KB for improved performance.
• Added download zip button inside the Agent Builder Explorer.
• Enhanced tracing URLs allowed by adding them to the Datadog RUM config.

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langsmith-0.13.4

• Fixed the toggle functionality for all column sections when clicking the Columns header.
• Fixed failure to edit SSO settings
• Improved frontend performance by using BarSeries instead of AnimatedBarSeries for granular usage tabs.
• Added a Cmd + Enter hotkey to the new annotation queue for enhanced user interaction.
• Added an option in the playground UI to mitigate loading errors by defaulting to use_responses_api=true.
• Added support for custom Azure models.
• Updated the playground UI for improved user experience.
• Improved studio chat UX with auto-resize textarea and keyboard shortcuts.
• Fixed prompt saving issue with incorrect naming.
• Improved visibility and user experience by making search icons larger and tracking navigation of AQ, prompts, and deployments.
• Enhanced UI for the Agent Builder with the introduction of a new Diff UI with context lines.
• Enabled accurate Y-axis margins using d3 nice ticks for better frontend visualization.
• Allowed the ‘recently added to’ section to pop over in the ‘add to dataset’ UI.
• Added pagination to the dashboard select view for better usability.
• Added support to limit long-lived TTL options and expose them in the org TTL settings endpoint.
• Fixed a bug with streaming flicker using the responses API in the playground.
• Enhanced the annotation queue user experience with custom output rendering in new queues.
• Optimized dataset session comparison using example_ids filtering for better performance.
• Provided a download ZIP file button in the Agent Builder for user convenience.
• Added a streamlined loading state for the Agent Builder’s agent generator graph.
• Allowed updating and creating SSO settings specifically in self-hosted environments.
• Added support for displaying SCIM user’s displayName attribute.

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langsmith-0.13.3

• Improved streaming to accumulate streamed delta data without loss.
• Added Google Sheets/Docs tools integration.
• Enhanced UX for OAuth servers in settings.
• Made view trace links more obvious in the UI.
• Resolved multiple bugs and performance issues in Agent Builder, including writing self-hosted Agent Builder runs to a single project and collapsing subagent tool cards by default.
• Improved experiment UI, now showing experiment descriptions on the single experiment page and fixing a blank page issue when accessing experiments via public URL.
• Enhanced UX by solving bulk export flakiness and allowing updating of bulk export destination credentials.
• Improved inline filter UX with multiple bug fixes and added edit functionality.
• Added support for configurable run input/output preview paths on the backend.
• Introduced new workspace management permissions for managing members’ access.
• Optimized Agent Builder to reduce network calls.
• Added Action Menu to MyAgents Navlink in Agent Builder.
• Improved frontend performance, including solving slowness when loading authentication status.
• Enhanced Agent Builder with the API Key Needed Label/Button and collapsed action cluster features.
• Resolved playground tool modal overflow issue.
• Improved security by fixing frontend vulnerability in remix run router and clearing URLs on logout to prevent workspace misdirection.
• Updated API to use invoices for monthly burndown tracking and added support for V2 API.
• Improved frontend to handle malformed LLM outputs gracefully.
• Improved date/time selection UI by allowing bold “Last time” values for DateTimeRangePicker component.

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langsmith-0.13.2

• Fixed content-type validation for dataset uploads to improve data handling.
• Improved the new annotation queue page with a pretty JSON editor and message list editor.
• Enabled better handling of retriable ingest errors on QueueRunPayloads.
• Fixed Cron Trigger updates in the Agent Builder UI.
• Added support for Redis Cluster, enhancing scalability for self-hosted setups.
• Fixed OAuth account takeover vulnerability to enhance security.
• Improved rendering of raw output in the playground.
• Added new inline UX filters and a View Dropdown component for enhanced user interaction.
• Increased line-height on XS Text variant to prevent clipping issues in the frontend.

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langsmith-0.13.1

• This release packages the same LangSmith application version as langsmith-0.13.0. Refer to the langsmith-0.13.0 release notes below.

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langsmith-0.13.0

• Added support for Agent Builder in self-hosted deployments
• Added configurable trace TTL for long-lived traces
• Added ability to conditionally enable OAuth tools and triggers
• Added sample application creation during onboarding
• Fixed feedback pagination and auto-pagination bugs
• Fixed trace drawer skeleton not appearing immediately

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langsmith-0.12.37

• This release packages the same LangSmith application version as langsmith-0.12.36. Refer to the langsmith-0.12.36 release notes below.

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langsmith-0.12.36

• Added support for custom MCP servers with OAuth in Agent Builder
• Added ability to view and edit memory files in Agent Builder
• Added support for attachments in the frontend
• Improved streaming tree performance in trace viewer
• Fixed scroll behavior in trace tree
• Fixed unicode truncation issues in trace display
• Fixed onboarding screen showing incorrectly when runs exist
• Increased maximum automation rules per workspace to 200

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langsmith-0.12.35

• Added per-bar highlighting for feedback charts in experiments
• Added Agent Builder activity feed
• Changed experiment chip to hover card for better usability
• Fixed agents appearing in random sidebar positions
• Fixed tool modal nesting issue in playground
• Fixed diff mode fallback on comparison page
• Fixed race condition in OAuth authentication requests

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langsmith-0.12.34

• Added Redis IAM authentication support for GCP and Azure
• Added self-serve audit logs in OCSF format
• Added hide column option to experiment outputs header
• Added message_user tool to the tool server
• Improved trace tree loading speed
• Allowed basic auth installations to disable invites via API
• Fixed tenant ID handling in navigation
• Fixed scrolling in Agent Builder templates view
• Fixed Gmail account connection limit tooltip
• Fixed user view preference persistence on page load
• Fixed tab wrapping in UI
• Made feedback charts visible by default
• Made SCIM group name matching case-insensitive

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langsmith-0.12.33

• Security fix: fixed Studio vulnerability to malicious baseUrl param by requiring user-defined allowed origins
• Allow enabling invites alongside JIT provisioning for SSO (OAuth with Client Secret mode only)
• Added self-serve audit logs for administrative actions (Private Preview)

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langsmith-0.12.32

• Added IAM connection support for PostgreSQL (AWS only).
• Added GPT-5.2 model support to the playground.
• Added support for setting memory limits on executor pods.

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langsmith-0.12.31

• Improved error messages for basic authentication misconfiguration.
• Added organization operator role support.
• Fixed issues with streaming datasets endpoint.

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langsmith-0.12.30

• This release packages the same LangSmith application version as langsmith-0.12.29. Refer to the langsmith-0.12.29 release notes below.

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langsmith-0.12.29

• Added mTLS (mutual TLS) support for ClickHouse connections to enhance security for database communication.

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langsmith-0.12.28

• Added mTLS (mutual TLS) support for PostgreSQL connections to enhance security for database communication.
• Added mTLS support for ClickHouse clients.
• Fixed Agent Builder onboarding and side navigation visibility when disabled in self-hosted deployments.

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langsmith-0.12.27

• Added mTLS (mutual TLS) support for Redis connections to enhance security.
• Added support for empty trigger server configuration in self-hosted deployments.
• Improved incident banner styling and content.

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langsmith-0.8.30

• Internal improvements and maintenance updates

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langsmith-0.12.25

• Enabled Agent Builder UI feature flag for self-hosted deployments.
• Added Redis Cluster support for improved scalability and high availability.

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langsmith-0.12.24

• Added dequeue timeouts to all SAQ (Simple Async Queue) queues to improve reliability.
• Performance improvements and bug fixes.

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langsmith-0.12.23

• Internal improvements and maintenance updates

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langsmith-0.12.22

• This release packages the same LangSmith application version as langsmith-0.12.21. Refer to the langsmith-0.12.21 release notes below.

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langsmith-0.12.21

• Added explicit revisionHistoryLimit configuration for operator deployment template.

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langsmith-0.12.20

• This release packages the same LangSmith application version as langsmith-0.12.18. Refer to the langsmith-0.12.18 release notes below.

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langsmith-0.12.19

• This release packages the same LangSmith application version as langsmith-0.12.18. Refer to the langsmith-0.12.18 release notes below.

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langsmith-0.12.18

• Internal improvements and maintenance updates

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langsmith-0.12.17

• Internal improvements and maintenance updates

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langsmith-0.12.16

• Internal improvements and maintenance updates

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langsmith-0.12.15

• Internal improvements and maintenance updates

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langsmith-0.12.14

• Internal improvements and maintenance updates

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langsmith-0.12.13

• This release packages the same LangSmith application version as langsmith-0.12.12. Refer to the langsmith-0.12.12 release notes below.

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langsmith-0.12.12

• Internal improvements and maintenance updates