changelog#

The format is based on Keep a Changelog.

[2.7.9] - 2026-09-16#

Added#

  • OMPE-103987 (NVBug 6544204): Shared Live Session links now name the storage discovery service that hosts the session, when exactly one connected service claims the stage.

Fixed#

  • OMPE-103987 (NVBug 6544204): A failed stage open reports the omniclient result for the URL instead of a bare ERROR: Failed to Open Stage.

[2.7.8] - 2026-09-14#

Fixed#

  • OMPE-103987 (NVBug 6544204): Retry opening a Live Session’s root layer when joining by shared link, so an intermittent first-read failure no longer aborts the join.

[2.7.7] - 2026-09-10#

Fixed#

  • NVBug 6544204: Remap shared Live session UUIDs to the receiver’s local provider URL before joining.

[2.7.6] - 2026-09-04#

Fixed#

  • OMPE-108624 (NVBug 6713654): “End and Merge” labelled its pre-merge checkpoint with the user’s description, so that checkpoint held the pre-session base layer; the description now marks only the merged checkpoint, and a URL the server keeps no checkpoints for is skipped rather than failing the merge.

[2.7.5] - 2026-08-18#

Fixed#

  • OMPE-103989: Checkpoint the persistent base layer when merging a Live session.

  • OMPE-103987: Join shared Live session links by their verified resolved session URL instead of relying on a session-list name lookup.

[2.7.4] - 2026-07-27#

Fixed#

  • OMPE-100965 (NVBug 6436397): Undo of a RemovePrimSpec command with multiple prim spec paths restored only the last removed spec and recreated the others as empty specs, silently losing their data. All specs are now backed up before any removal and only actually backed-up specs are restored on undo.

[2.7.3] - 2026-07-16#

Fixed#

  • OMPE-43454: Guard against a null stageHandle in LayersState::update to fix a crash on concurrent stage open. Added a regression test that reproduces the null-handle window and verifies the update loop no longer crashes.

[2.7.2] - 2026-07-06#

Changed#

  • OMPE-99673: Live session list and logged-user info queries no longer block the main thread at stage open. Session discovery (omniClientLiveListSessions) and the user-name lookup (omniClientGetServerInfo) run asynchronously and are drained per-frame, removing the load-time stall introduced by synchronous polling. No API change.

[2.7.1] - 2026-07-01#

Fixed#

  • NVBug 6388648: Join live-session links for stages that are not already open.

[2.7.0] - 2026-05-19#

Changed#

  • Migrated Live Session management from filesystem-based approach (__session__.toml, directory listings) to the OmniClient Live Session API (omniClientLiveListSessions, omniClientLiveCreateSession). Session discovery now uses periodic polling via omniClientLiveListSessions. This change is backwards-compatible: the v2 ABI of IWorkflowLiveSyncing is preserved (no major-version bump) and the Python surface keeps the same shape — see Deprecated below.

Deprecated#

  • IWorkflowLiveSyncing::getLiveSessionChannelUrl, joinLiveSessionByURL, and getLoggedInUserIdForLayer (C++) — retained for ABI compatibility but now log a one-time deprecation warning and return empty/false. The new omniclient-backed model no longer addresses channels as separate URLs, no longer supports joining by URL, and no longer exposes a per-layer logged-in user id.

  • IWorkflowLiveSyncing::getLoggedInUserNameForLayer (C++) renamed to getLoggedUserNameForLayer; the previous Python-binding name get_logged_in_user_name_for_layer is retained as a deprecated alias that forwards to the new name.

  • LiveSession.channel_url (Python) — deprecated property; always returns "".

  • LiveSyncing.join_live_session_by_url(...) (Python) — deprecated method; always returns False. Migrate to join_live_session() with a LiveSession from get_live_session_by_url() or find_live_session_by_name().

  • LiveSyncing.permission_to_merge_current_session (Python) — retained as a @property matching the v2 shape; deprecated in favour of LiveSession.merge_permission.

Fixed#

  • OMPE-85681: Fix crash when dereferencing expired edit target layer in stopCurrentLiveSession and startLiveSession.

[2.6.0] - 2026-02-10#

Changed#

  • Use omni.activity.ui’s get_open_file_addon_callback instead of register_open_stage_addon for activity hook

  • let omni.kit.usd.layer depends on omni.acitivty.ui instead of the other way around.

  • Add deprecation log for register_open_stage_addon

[2.5.2] - 2026-01-20#

Changed#

  • OMPE-73361: Restore render-settings to stage on exit of live-session (as they have been placed in the live-session layer)

[2.5.1] - 2025-12-11#

Fixed#

  • OMPE-73674: Fix time samples being authored at incorrect times in live sessions when stage has non-default timeCodesPerSecond.

[2.5.0] - 2025-11-24#

Changed#

  • Updated to use usd/sdf file format changes

[2.4.3] - 2025-11-25#

Changed#

  • OMPE-72436: Fix test with deprecated sdf file format

[2.4.2] - 2025-08-28#

Removed#

  • OMPE-56461: add test case with ‘+’ in query/non-query string of a URL.

[2.4.1] - 2025-06-10#

Removed#

  • OMPE-47961: customLayer data edits resetting render settings

[2.4.0] - 2025-07-25#

Changed#

  • Updated to use Events 2.0

[2.3.1] - 2025-06-26#

Fixed#

  • OMPE-50278: Fix crash when dereferencing nullptr for stage in test test_open_stage_with_live_session_mock.

[2.3.0] - 2025-06-10#

Changed#

  • OMPE-47961: Change to customLayerData should also emit INFO_CHANGED layer event.

[2.2.11] - 2025-05-30#

Changed#

  • OMPE-49021: Put open stage in a thread to avoid blocking the main thread on auth.

[2.2.10] - 2025-05-14#

Changed#

  • OMPE-45217: Fix test errors on OVC2.

[2.2.9] - 2025-05-01#

Changed#

  • Prepare for Python-3.12

[2.2.8] - 2025-04-26#

Changed#

  • OMPE-39146: Remove hard code for “omnverse”.

[2.2.7] - 2025-04-24#

Changed#

  • OMPE-43458: Fix test error in test_workflow_livesyncing.

[2.2.6] - 2025-04-17#

Changed#

  • Refactor UsdNotice handling to target stages and handle Sdf.Layer mutedness for OpenUSd-25.02

[2.2.5] - 2025-04-07#

Changed#

  • Updated to use omni.usd via eventdispatcher (Events 2.0) instead of EventStream (Events 1.0)

[2.2.4] - 2025-03-31#

Changed#

  • OMPE-37291: Improved error reporting for USD crate file version mismatch when creating layer reference.

[2.2.3] - 2025-03-11#

Changed#

  • OMPE-24091: If underlying channel reports error, stop and remove live session.

[2.2.2] - 2025-01-23#

Fixed#

  • OMPE-33230: Don’t check availability for omni.kit.widget.versioning when creating checkpoint.

[2.2.1] - 2025-01-22#

Fixed#

  • OMPE-30471: Change back LiveSession.modifiedTimestamp to seconds and fix issue with live session sort order.

[2.2.0] - 2024-09-17#

Fixed#

  • OMPE-20299: Issue with invalid customStateDelegate

[2.1.36] - 2024-09-05#

Added#

  • OMPE-12316: Add test for local path resolving.

[2.1.35] - 2024-07-26#

Changed#

  • OMPE-14264: Fix issue with ETM test for omni.graph.test test_path_attribute.

[2.1.34] - 2024-03-27#

Changed#

  • OMPRW-311: Fix some errors encountered during unit test.

[2.1.33] - 2024-02-22#

Changed#

  • OMPRW-838: Improve locking to persist lock status.

[2.1.32] - 2023-12-13#

Changed#

  • Copy all metas from stage after new layer creation.

[2.1.31] - 2023-12-12#

Changed#

  • Add more docs.

[2.1.30] - 2023-12-08#

Changed#

  • Improve mock utils to support live prim.

[2.1.29] - 2023-11-30#

Changed#

  • In a live session, if a user is not the owner and tries to save the stage, show warning message in console.

[2.1.28] - 2023-11-27#

Changed#

  • Fix crash that’s caused by removing live session folder.

[2.1.27] - 2023-11-13#

Changed#

  • Improve mock utils to create mocked live layers.

[2.1.26] - 2023-10-27#

Changed#

  • Send out sublayer refresh event for layer reload.

[2.1.25] - 2023-10-26#

Changed#

  • Add test util function for forbidding user merge.

[2.1.24] - 2023-10-24#

Changed#

  • Mock user join/left with channel message.

[2.1.23] - 2023-10-18#

Changed#

  • Add open stage callback register for the use of e.g. Activiy window

[2.1.22] - 2023-10-18#

  • Add more tests to increase code coverage.

  • Fix issues for mock utils.

[2.1.21] - 2023-10-16#

  • Add mock utils for unittests that don’t depend on real server states.

[2.1.20] - 2023-10-13#

  • Fix crash caused by accessing released session handle.

[2.1.19] - 2023-09-18#

  • Make omni.kit.collaboration.channel_manager optional.

[2.1.18] - 2023-07-17#

  • Fix test on OVC

[2.1.17] - 2023-07-13#

  • Improve layer event handling to only handle interested events.

[2.1.16] - 2023-07-07#

  • Add API to get owner of layer.

  • Fix ownership check.

[2.1.15] - 2023-07-07#

  • Delays authoring target change if join live session is batched with Sdf.ChangeBlock.

[2.1.14] - 2023-06-23#

  • Add API for LayerEventPayload to query influenced layers.

[2.1.13] - 2023-06-19#

  • Add modified time for live session to support sorting by access time.

[2.1.12] - 2023-06-13#

  • Fix possible crash that’s caused by re-parenting live prims.

[2.1.11] - 2023-05-26#

  • Creates default prim as over instead of def for live layer of live prim to instruct duplication logic.

[2.1.10] - 2023-05-23#

  • Add settings to control display of outdate notifications.

[2.1.9] - 2023-05-11#

  • Fix issue that live sessions cannot be found for several of them when multiple layers are in the same folder.

[2.1.8] - 2023-04-30#

  • Tweaked auto reload behavior to work better with live sessions.

[2.1.7] - 2023-04-28#

  • Extends LayerEventType to add AUTO_RELOAD_LAYERS_CHANGED event for notifying list change of auto reload layers.

[2.1.6] - 2023-04-20#

  • Add API to add/remove auto-reload prims.

[2.1.5] - 2023-04-11#

  • Respect in_live_session status when reloading layers.

  • Added the ability to filter outdated layers by in_session status.

[2.1.4] - 2023-04-10#

  • Improve live prim support to support joining live session for multiple prims with the same base layer.

[2.1.3] - 2023-03-28#

  • Add utils to get short user name for live session user.

[2.1.2] - 2023-03-22#

  • Ensure single leader in the live session.

[2.1.1] - 2023-03-21#

  • Don’t allow auto-authoring when stage is in any live session.

  • Add interface to cancel session join.

[2.1.0] - 2023-03-14#

  • Supports auto-reload interfaces to get/fetch outdated layers.

[2.0.20] - 2023-03-15#

  • Add supports to follow user in a live session.

[2.0.19] - 2023-03-08#

  • Add interface to open stage with live session joined.

[2.0.18] - 2023-03-07#

  • More improvements to runtime performances of subscribing all layres except sublayers.

[2.0.17] - 2023-03-07#

  • Fix issue to join session for prim to make sure default prim of live layer is the same as base layer.

[2.0.16] - 2023-02-24#

  • More improvements to the performance of loading stage with thousands of layers.

[2.0.15] - 2023-02-23#

  • Add supports to create live session for references/payloads.

[2.0.14] - 2023-02-20#

  • Only copy interested layer meta into live layer when it’s in a live session.

[2.0.13] - 2023-02-17#

  • Fix performance regression of loading stage.

[2.0.12] - 2023-02-14#

  • Save target layer after merging live session.

  • Add support to refresh payloads and references if they are outdated.

[2.0.11] - 2023-01-12#

  • Add user color support for live session user.

[2.0.10] - 2022-11-30#

  • Fix permission issue for sublayer live session if root layer is anonymous.

[2.0.9] - 2022-11-09#

  • Fix flaky specs_locking test

[2.0.8] - 2022-11-02#

  • Add API for fetching logged-in user and id for layer.

  • New events before/after merging live session.

[2.0.7] - 2022-10-28#

  • Fix issue that session creates with different DNS alias cannot be found.

[2.0.6] - 2022-10-27#

  • Fix UI issue that can show two sublayers as edit target.

[2.0.5] - 2022-10-21#

  • Fix regression to merge live session to new layer.

[2.0.4] - 2022-10-20#

  • Fix live session list refresh issue created by other connectors.

[2.0.3] - 2022-10-15#

  • Fix issue to parse payload of LIVE_SESSION_LIST_CHANGED event.

[2.0.2] - 2022-10-12#

  • Fix join live session by url that returns invalid session pointer.

[2.0.1] - 2022-10-05#

  • Fix crash if a session is joined and it’s removed from disk.

  • Fix edit target switch issue after joining live session.

  • Notification to remind saved session inside opened stage.

[2.0.0] - 2022-09-29#

  • Re-work omni.kit.usd.layers to support sublayer live sesison.

[1.1.8] - 2022-09-20#

  • Fix layer refresh if layer stack includes duplicate sublayer.

  • Fix crash to switch muteness scope.

[1.1.7] - 2022-09-13#

  • Ignore case for comparing session management message.

  • Synchronize layer meta between root and live root layer in live session.

[1.1.6] - 2022-08-09#

  • Fix layer version refresh

[1.1.5] - 2022-08-05#

  • Add version safeguard for TOML file.

[1.1.4] - 2022-07-25#

  • Fix duplicate outdate notification.

  • Move outdate notification from layer view into this extension.

[1.1.3] - 2022-07-20#

  • Add API to support link live layer to specific base layer for supporting projec workflow of other connectors.

[1.1.2] - 2022-07-11#

  • Fix merge_changes_to_specific_layer and add tests.

[1.1.1] - 2022-06-15#

  • Move channel management into this extension from layers view.

[1.1.0] - 2022-05-31#

  • Supports new live workflow.

[1.0.0] - 2022-03-31#

  • Initial extension.

  • Refactoring omni.usd to move layers interface to this extension.

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