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This page documents notable changes to the Labellerr annotation platform. The latest releases appear first.

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About Versioning

This changelog follows Semantic Versioning principles:
  • MAJOR (X.0.0): Significant platform or workflow changes that can materially alter how the product is used.
  • MINOR (X.Y.0): New customer-facing capabilities and substantial backwards-compatible improvements.
  • PATCH (X.Y.Z): Focused bug fixes, reliability fixes, and small backwards-compatible improvements.
Major versions are intentionally rare.

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Changelog Categories

  • Added: New features and capabilities
  • Changed: Improvements or behavior changes to existing functionality
  • Fixed: Bug fixes and reliability improvements
  • Security: Security, authentication, access-control, or policy changes

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[2.0.1] - 2026-08-20

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Fixed

  • Export-service singleton and connection-reset — Fixed export-service singleton and connection-reset issues affecting coordinate normalization, pagination, and service reinitialization.
  • Export processing reliability — Improved export processing reliability for data-type handling and aggregation preferences.

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[2.0.0] - 2026-08-18

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Added

  • Workspace management and access controls — Added workspace settings, workspace-level user management, SSO enforcement, and IP allowlisting.
  • WebCodecs/CMAF video playback — Added client-side WebCodecs/CMAF playback with JPEG fallback, audio controls, enhanced timeline navigation, and frame-based mark-out controls.
  • SAM2 tracking for segmented video — Added frame acquisition and tracking support for videos stored as CMAF/HLS segments.

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Changed

  • Video playback and frame acquisition — Improved video playback, frame acquisition, buffering, caching, and recovery across segmented and JPEG-backed video (CMAF decode tier, JPEG fallback, density-gated frame ranges).
  • Video annotation draft handling — Improved video annotation draft handling with accumulated changes and undo/redo support.
  • Workspace access and error handling — Improved workspace access and error handling.

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Fixed

  • Delta handling for video — Improved delta handling for video annotation saves and made aggregation strategy a user preference (LABIMP-8894 — Actions #121, ExportsCore #69, labellingTool #1433).

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Security

  • Workspace-level SSO and IP — Added workspace-level SSO and IP allowlist enforcement.
  • Gateway-level CORS validation — Improved gateway-level CORS validation and API-key handling.

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[1.21.0] - 2026-07-28

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Added

  • SAM3 text-prompt support — Added SAM3 text-prompt support for annotation workflows.
  • SAM3 support for bounding-box prompts — Added SAM3 support for bounding-box prompts in the annotation tool.
  • SAM3 cross-image similarity search — Added SAM3 cross-image similarity search using reference regions or text prompts.
  • Batch similarity-search processing across project images — Added batch similarity-search processing across project images.
  • Batch processing for saving inference answers — Added batch processing for saving inference answers across multiple files.
  • Per-file success and error reporting — Added per-file success and error reporting for batch inference-answer operations.
  • Activity associations and background indexing — Added activity associations and background indexing support for inference saves.

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Changed

  • SAM3 prediction performance via cached instances — Improved SAM3 prediction performance by reusing cached model instances.
  • COCO pre-annotation exports with attributes — Improved COCO pre-annotation exports to preserve annotation attributes as structured metadata.
  • SAM3 validation and prediction filtering — Improved SAM3 validation and prediction filtering.

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[1.20.0] - 2026-06-17

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Added

  • Active Events overlay — Added an Active Events overlay for quickly identifying events present at a specific point in a video.
  • Change Label action — Added a Change Label action for event-tagging annotations in the video player.
  • Display controls in toolbar — Added display controls in the video annotation toolbar.
  • Manual start/end frame controls — Added manual controls for changing event start and end frames.
  • Prefetching of upcoming video frames — Added prefetching of upcoming video frames to improve playback responsiveness.
  • AWS S3 support for video — Added AWS S3 support for video frame retrieval.
  • Background prefetch of next-video frames — Added background prefetch of next-video frames using IDB store as cache for faster cold-start and transitions.

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Changed

  • Video playback buffering — Improved video playback buffering, caching, and frame availability handling (tiered memory + persistent cache, scheduled signed URLs, stall/miss tolerance).
  • Video-player controls and playback state — Improved video-player controls and playback state management.
  • Export handling for audio and multimodal — Improved export handling for audio and multimodal data types.

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Fixed

  • Date filtering for files — Fixed date filtering for files updated on the same day.
  • User edit flow — Fixed user edit flow in existing projects — project list readiness and filtering now update reliably without background polling.
  • Modal layering — Fixed modal layering that blocked S3 connection setup.

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[1.19.0] - 2026-05-28

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Added

  • MediaPipe landmark detection — Added MediaPipe landmark detection for hand and pose keypoints, including egocentric video tracking.
  • Per-keypoint attributes — Added per-keypoint attributes for keypoint skeleton annotations.
  • SAM2 tracking for polygons — Added SAM2 tracking for polygons using bounding-box prompts.
  • Attribute filtering for annotations — Added attribute filtering for annotations.
  • Improved keypoint guidelines based on MediaPipe — Added improved keypoint guidelines based on MediaPipe landmarks.
  • Per-keypoint attribute export in COCO — Added per-keypoint attribute export in COCO JSON.
  • Finish-on-N for polygon drawing — Added finish-on-N for polygon drawing with ordered timeline tracks and improved tracking reliability.

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Changed

  • Video tracking frame-range handling — Improved video tracking frame-range handling for landmark models.
  • Annotation filtering — Improved annotation filtering in image and video players.
  • Export support for multiple data types — Improved export support for multiple data types and video manifests (including per-file sharding).
  • Connection handling and CORS — Improved connection handling and optional CORS configuration for data connections, with warnings and test result panels.

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Fixed

  • Pixel-level polygon accuracy — Fixed pixel-level polygon accuracy on scaled/zoomed canvases and improved anchor targeting.
  • Timeline min/max length — Fixed timeline min/max length and narrow single-frame visibility; improved dashboard layout and resize controls.
  • Delete-project InProgress handling — Fixed delete-project & InProgress handling for projects exceeding 24h threshold and refined polling.
  • Export delete-button error — Fixed export delete-button error and indexing chip display when indexing is active.

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[1.18.0] - 2026-04-24

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Added

  • Event-annotation attributes — Added event-annotation attributes in the video player.
  • Editing support in Gallery — Added editing support in Gallery View and View Mode.
  • Auto-Bordering for polygon — Added Auto-Bordering for polygon annotations (Alt+click boundary-following, batch-aware undo/redo).
  • Direct accept/reject actions — Added direct accept/reject actions from View Mode.
  • View-only annotation mode — Added view-only annotation mode with permission-based controls and expanded domain for accept/reject across statuses.

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Changed

  • Attribute dialog UX — Improved attribute dialog UX and visual context (short IDs, bulk editing, draggable headers).
  • Audio annotation state — Improved audio annotation state management and draft saving via ngRx store.
  • Expanded workflow-state handling — Expanded workflow-state handling for accept/reject actions.

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Fixed

  • Guideline creation navigation — Fixed guideline creation navigation, pixel-level polygon issues, and UI stacking behavior.
  • Attribute validation for required — Fixed attribute validation for required attributes (including video-data skip and per-keypoint level checks).

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[1.17.0] - 2026-03-30

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Added

  • Keypoint annotation export — Added keypoint annotation export to COCO JSON, including skeleton information.
  • COCO pre-annotation support — Added COCO pre-annotation support for keypoints.
  • Edit-mode save API integration — Added edit-mode save API integration.
  • Transactional file assignment — Added transactional file assignment to reduce conflicts when assigning files to users.

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Changed

  • Refactored image annotation — Refactored image annotation workflows.
  • Keypoint export validation — Improved keypoint export validation and annotation retrieval.

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Fixed

  • Inline export error — Improved inline export error handling and edit-mode reliability.

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[1.16.0] - 2026-02-16

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Added

  • More reliable export — Added more reliable export processing through a Cloud Run Job and Apache Beam pipeline.
  • S3 export support — Added S3 export support.

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Changed

  • SAM request handling — Improved SAM request handling by removing the deprecated image-link dependency.
  • SAM3 prediction behavior — Improved SAM3 prediction behavior so annotation attributes can be carried forward.
  • GRPC connection reliability — Improved gRPC connection reliability and retry handling (safer channel recreation, recoverable-error handling).

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[1.15.0] - 2026-01-31

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Added

  • Annotation activity logs — Added annotation activity logs and fixed preservation of labelling transition time.
  • SAM+ for Magic Wand — Added SAM+ for Magic Wand and polygon refinement workflows (persistent model option, batch refinement, parallel warmup).
  • SegRefiner/SAMPlus-based annotation refinement — Added SegRefiner/SAMPlus-based annotation refinement.

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Changed

  • Video annotation attributes — Improved video annotation attributes in the player (frame-aware dialogs, prior-frame retrieval).
  • Project deletion and user-interface — Improved project deletion and user-interface flows (typed confirmation, selected-project indicator).
  • Annotation label-main architecture — Improved annotation label-main architecture and activity tracking (centralized store-driven workflow, autosave, activity preview).

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[1.14.0] - 2025-12-26

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Added

  • Configurable API rate — Added configurable API rate limiting (global per-client, 429 + Retry-After).
  • Short video previews — Added short video previews.
  • Support for streaming — Added support for streaming TS video content through the video data pipeline (HLS playlist + TS segment proxy, adapter-based storage).
  • Selective project-based user — Added selective project-based user import (guided two-step flow with per-step search and validation).

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Changed

  • Video-player stability when — Improved video-player stability when switching videos (resource cleanup, preloading fixes).
  • Annotation pagination and similar-file — Improved annotation pagination and similar-file search pagination (consistent footers, improved control).
  • Handling of missing — Improved handling of missing video end-frame values with FPS/start-end fallbacks and manual annotation consistency.
  • Visibility of bounding-box — Improved visibility of bounding-box corners and annotation-setting previews.

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Fixed

  • Video-player pagination and search-navigation — Fixed video-player, pagination, and search-navigation issues including rescaling/UI distortion on export↔files switching and pagination when searching similar files.

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[1.13.0] - 2025-11-29

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Added

  • File-queue thumbnails to make — Added file-queue thumbnails to make navigation easier in full-page annotation view.
  • Files Management milestone — Added Files Management milestone 2 capabilities (table/grid/object views, virtualized grid, search/filter/sort, bulk select, export).
  • Superset dashboarding support — Added Superset dashboarding support (guest-token viewer).
  • SAM3 exemplar-prompt support — Added SAM3 exemplar-prompt support (dedicated prediction + warmup endpoints, runtime mode selection).
  • Video pre-annotation processing — Added video pre-annotation processing improvements (COCO-for-video, unified media pre-annotations with Pub/Sub).

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Changed

  • Grouping selection and polygon — Improved grouping selection and polygon clipping workflows (precise containment, multi-piece clipping, G-shortcut).
  • Annotation bounds handling — Improved annotation bounds handling by keeping polygons and points within image boundaries (clamping/normalization).
  • File switching stability — Improved file switching stability and prevented annotations from carrying over between files (virtual scroll buffering, batched tree expansion).

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Fixed

  • Race conditions when — Fixed race conditions when switching files quickly in the annotation gallery and when fetching file data via gallery strip.

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[1.12.0] - 2025-10-24

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Added

  • File-management capabilities — Added file-management capabilities as an initial milestone of the Files Management module.
  • File tagging support — Added file tagging support and tagging APIs (single & batch, per-file success/failure, gRPC services, reserved-tag validation).
  • Keyboard shortcuts for changing — Added keyboard shortcuts for changing annotation labels (L for label, N for complete polygon).
  • Polyline occlusion handling — Added polyline occlusion handling with right-click interactions (gray dashed styling, persistence).
  • Dedicated gRPC services — Added dedicated gRPC services for file tagging and exports (with context propagation, background tasks, centralized error handling).

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Changed

  • Bulk inference handling — Improved bulk inference handling for pre-label and review-ready predictions (cloud-bucket support, dual storage paths).
  • Polygon editing and annotation — Improved polygon editing and annotation workflows (including eraser transparency to 100% for target polygon).

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Security

  • Security fixes across — Applied security fixes across export and gateway services.

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[1.11.0] - 2025-09-30

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Added

  • Project indexing progress — Added project indexing progress tracking with ETA information.
  • SAM2.1 support and updated — Added SAM2.1 support and updated frame-loading behavior (removed old SAM dependency).
  • Structured tracing and correlation — Added structured tracing and correlation information for improved diagnostics (GCP logging spans).

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Changed

  • Annotation rendering after — Improved annotation rendering after video load and handling of deleted/dangling video events.
  • Logging and error reporting — Improved logging and error reporting across core services (centralized error handling, context-based logging).
  • Project indexing and file-processing — Improved project indexing and file-processing visibility.

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Fixed

  • UUID compulsory enforcement — Fixed UUID compulsory enforcement in requests and made error handling more robust.
  • In-progress dataset selection — Fixed in-progress dataset selection handling.

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Security

  • Access-control and gateway — Addressed access-control and gateway security considerations alongside logging improvements.

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[1.10.0] - 2025-08-30

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Added

  • Search experience — Added a search experience for the file listing page, including support for legacy and newer query patterns (reusable search components, textarea mode, date-range guards).
  • Multi-object tracking support — Added multi-object tracking support (simultaneous tracking, multi-object API).
  • Video keyframe and marker — Added video keyframe and marker retrieval capabilities (keyframe/marker APIs, DataCore frame fetch).
  • Richer SAM2 logging — Added richer SAM2 logging and annotation history tracking for image and video workflows (GCS structure, session/history).
  • Ability to see similar — Added ability to see similar files already annotated on the labeling screen.
  • Video dataset upload — Added video dataset upload improvements with quality checks and new status chips.

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Changed

  • Delta-delete handling when — Added delta-delete handling when saving annotations across supported data modalities (GCS + Firestore delta logic).
  • Video dataset upload — Improved video dataset upload states and playback-related workflows.
  • File-list filtering pagination — Improved file-list filtering, pagination, status indicators, and annotation navigation (pagination fixes, status chip normalization).
  • Image adjustment controls — Improved image adjustment controls (brightness/contrast) and similar-file search behavior.
  • Pagination and annotation-count — Improved pagination and annotation-count filtering (including annotation count filters and file-listing page fixes).

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Fixed

  • SAM2 frame coverage — Fixed SAM2 frame coverage for last few frames, annotation counts, pagination, status display, and file transitions.
  • Pagination on file listing — Fixed pagination on file listing page (second-page reload, filter reset) and dataset page API params.
  • Irregular status chips — Fixed irregular status chips on file listing page.
  • User-added refresh new — Fixed user-added refresh — new users now appear via optimistic update without manual refresh.
  • Dialog-box tests and stale — Fixed dialog-box tests and stale SAM temp-state when deselecting questions.
  • Bounding-box creation when — Fixed bounding-box creation when release point is outside the Konva stage.
  • Video annotation delta — Fixed video annotation delta handling edge cases and in-progress dataset selection.

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[1.9.0] - 2025-07-27

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Added

  • Delta-based saving for video — Added delta-based saving for video annotations (firestore + caching optimization).
  • Polyline annotation support — Added polyline annotation support for satellite imagery.
  • Similar-file discovery for previously — Added similar-file discovery for previously annotated files.
  • Project failure status — Added project failure status visibility (red “Failed” pill for status_code 501).
  • Annotation indexing improvements — Added annotation indexing improvements for search (ES multimodal index flag, search bar suggestions).
  • Template search and improved — Added template search and improved project-creation validation (search reset on close, padding, name validation).
  • Bounding-box validation for empty — Added bounding-box validation for empty submissions and out-of-bounds handling.

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Changed

  • Video annotation change — Improved video annotation change tracking and diff handling (diff updates for video annotation).
  • File-list and project — Improved file-list and project responsiveness and pagination (table-responsive, media queries, dataset pagination).
  • Annotation validation and erased-region — Improved annotation validation and erased-region handling (polygon validator for erased regions).
  • SAM2 processing including — Improved SAM2 processing, including support for multiple input points and concurrent processing (torch).

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Fixed

  • Responsive issues in project — Fixed responsive issues in project table and dataset page not updating when more files available.
  • Sentry issues on /files — Fixed Sentry issues on /files and /dashboard routes and guideline page visibility.
  • Export notification trigger — Fixed export notification trigger inconsistency.
  • Attribute filtering for pubsub — Fixed attribute filtering for pubsub aggregate job and export pre-processor for erased regions.
  • Latency for answer submission — Fixed latency for answer submission by not waiting for pubsub (10–15s → 2–5s).

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[1.8.0] - 2025-06-19

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Added

  • Anonymous dataset search — Added anonymous dataset search so users can explore datasets without logging in.
  • Direct accept/reject actions — Added direct accept/reject actions for review-stage files from grid view.
  • File status information — Added file status information to exports.
  • Support for exporting — Added support for exporting files across workflow statuses.

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Changed

  • Bounding-box validation and coordinate — Added bounding-box validation and coordinate normalization to keep annotations within image boundaries.
  • Validation behavior for submissions — Improved validation behavior for submissions without annotations.
  • The project dataset — Improved the project, dataset, guideline, and export interfaces.
  • Handling of failed file — Improved handling of failed file references and reference errors in export controllers.

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[1.7.0] - 2025-05-13

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Added

  • Gemini-powered LLM API — Added a Gemini-powered LLM API route.
  • Fallback handling when — Added fallback handling when file update timestamps are unavailable.
  • Improved error reporting — Added improved error reporting for cloud-storage operations.
  • Validation for invalid — Added validation for invalid polygon and bounding-box annotations (ignore invalid annotations).
  • Richer activity information — Added richer activity information for annotation and review workflows.

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Changed

  • Dataset and sample-file — Improved dataset and sample-file retrieval APIs (including getting sample file from dataset id).
  • Error reporting for cloud-storage — Improved error reporting for cloud-storage operations.
  • Rejected-file handling reassigned — Improved rejected-file handling — reassigned to last annotator/reviewer who updated it and preserved annotator/reviewer email.
  • Separated development and production — Separated development and production export workflows and made workflow builds distinct per environment.
  • Annotation-save latency for image — Improved annotation-save latency for image workflows via cache service.

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Fixed

  • UUID handling issues — Fixed UUID handling issues affecting request processing.
  • Add-remark endpoint removal — Fixed add-remark endpoint removal and fetching logic cleanup.

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[1.6.0] - 2025-03-28

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Added

  • Support for using fine-tuned — Added support for using fine-tuned SAM models when available.
  • Dedicated inference handling — Added dedicated inference handling for fine-tuned SAM workflows.

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Changed

  • The Actions service — Migrated the Actions service from Flask to FastAPI.
  • Export processing to use — Updated export processing to use YOLO11 instead of YOLOv5.
  • SAM usage tracking — Added SAM usage tracking.

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[1.5.0] - 2025-02-20

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Added

  • Label-based file filtering — Added label-based file filtering.
  • Export email notifications — Added export email notifications and ordering support.

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Changed

  • Bulk file movement across — Improved bulk file movement across workflow stages.
  • Session management token — Improved session management, token authentication, and cross-workspace session restrictions.
  • Error logging and workflow — Improved error logging and workflow timing information.

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[1.4.0] - 2025-01-30

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Added

  • Pre-annotation processing through — Added pre-annotation processing through Cloud Run jobs.
  • Simultaneous SAM2 tracking — Added simultaneous SAM2 tracking and the ability to stop long-running SAM2 jobs.
  • Validation hooks for missing — Added validation hooks for missing or invalid annotations.
  • Support for validating — Added support for validating and ignoring invalid polygon and bounding-box annotations.
  • Richer activity information — Added richer activity information for annotation and review workflows.

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Changed

  • Annotation-save latency for image — Improved annotation-save latency for image workflows.
  • Rejection handling by preserving — Improved rejection handling by preserving annotator/reviewer information and reassigning rejected files appropriately.
  • Validation messages and attribute — Improved validation messages and attribute handling.
  • Time-taken tracking in Firestore — Improved time-taken tracking in Firestore and error logging.

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Security

  • Reported API security — Addressed reported API security vulnerabilities and tightened allowed origins.

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[1.3.0] - 2024-12-17

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Added

  • SAM2 support for bounding-box-driven — Added SAM2 support for bounding-box-driven video annotation.
  • Support for storing — Added support for storing and retrieving image and auto-label annotations through the updated annotation flow.
  • Annotation storage in managed — Added annotation storage in managed object storage with compatibility for existing annotation data.
  • Annotator identity information — Added annotator identity information to activity records.

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Changed

  • Annotation persistence and retrieval — Improved annotation persistence and retrieval across image and video workflows.

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[1.2.0] - 2024-11-25

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Added

  • SAM2-based inference capabilities — Integrated SAM2-based inference capabilities.
  • Support for SAM inputs — Added support for SAM inputs encoded as base64 images.
  • File-detail and frame-aware — Added file-detail and frame-aware data retrieval APIs.
  • Handling of video frame — Improved handling of video frame answers when annotation IDs are unavailable.

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[1.1.0] - 2024-10-14

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Added

  • Decoding support for mask — Added decoding support for mask annotations stored in base64 form.
  • Inference responses for compact/binary — Improved inference responses for compact/binary mask data.

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[1.0.0] - 2024-09-24

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Added

  • File retrieval ordering — Improved file retrieval ordering and foundational data APIs.

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Staying Updated

To stay informed about new releases:

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Release Schedule

Future Labellerr releases can continue using the same Semantic Versioning convention:
  • Minor versions: New features and substantial backwards-compatible improvements
  • Patch versions: Focused fixes and small improvements
  • Major versions: Significant or potentially breaking product/workflow changes

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Support

Documentation

Guides and reference for the Labellerr annotation tool

Product Updates

Monthly feature updates and announcements

Support

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